diff --git a/contract b/contract
new file mode 160000
index 0000000..328f751
--- /dev/null
+++ b/contract
@@ -0,0 +1 @@
+Subproject commit 328f751cfdfbc487a62b46d8e579dfdbd463bb56
diff --git a/contract/.editorconfig b/contract/.editorconfig
deleted file mode 100644
index 10edce2..0000000
--- a/contract/.editorconfig
+++ /dev/null
@@ -1,16 +0,0 @@
-root = true
-
-[*]
-end_of_line = lf
-insert_final_newline = true
-charset = utf-8
-indent_size = 2
-indent_style = space
-
-[*.sol]
-indent_size = 4
-indent_style = space
-
-[Makefile]
-indent_style = tab
-indent_size = 8
diff --git a/contract/.gitignore b/contract/.gitignore
deleted file mode 100644
index 3297e19..0000000
--- a/contract/.gitignore
+++ /dev/null
@@ -1,5 +0,0 @@
-node_modules/
-artifacts/
-cache/
-.log/
-chain.ts
diff --git a/contract/LICENSE b/contract/LICENSE
deleted file mode 100644
index df62036..0000000
--- a/contract/LICENSE
+++ /dev/null
@@ -1,21 +0,0 @@
-MIT License
-
-Copyright (c) 2021 SparkLink
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
diff --git a/contract/Makefile b/contract/Makefile
deleted file mode 100644
index 5a98a1d..0000000
--- a/contract/Makefile
+++ /dev/null
@@ -1,34 +0,0 @@
-.PHONY: build test prepare clean
-
-prepare:
-	yarn
-	if [ ! -f chain.ts ]; then cp chain.sample.ts chain.ts; fi;
-
-build:
-	yarn hardhat compile
-
-test: build
-	yarn hardhat test
-
-clean:
-	yarn hardhat clean
-
-check:
-	yarn hardhat check
-
-rinkeby:
-	yarn hardhat run scripts/deploy.ts --network rinkeby
-
-matic:
-	yarn hardhat run scripts/deploy.ts --network matic
-
-BSC:
-	yarn hardhat run scripts/deploy.ts --network BSC
-
-ETH:
-	yarn hardhat run scripts/deploy.ts --network ETH
-
-hh:
-	yarn hardhat run scripts/deploy.ts 
-flatten:
-	yarn hardhat flatten ./contracts/SparkLink.sol > publish.sol
\ No newline at end of file
diff --git a/contract/README.md b/contract/README.md
deleted file mode 100644
index 508b473..0000000
--- a/contract/README.md
+++ /dev/null
@@ -1,85 +0,0 @@
-# SparkLink Smart Contract
-
-## Brief introduction
-
-SparkLink Smart Contract is an Ethereum smart contract.
-
-Authors can publish their virtual products (such as a book) on the blockchain and generate a `root NFT`.
-
-Others can buy a child `NFT3` from any existing father `NFT2`, holder of `NFT2` will get income.
-
-At the same time, holders of `NFT2`'s father `NFT3` will extract the amount corresponding to the proportion of royalties from the profit of the child `NFT2`.
-
-SparkLink Smart Contract can support these features:
-
-- Authors can create virtual products (such as a book) with attributes (such as: royalty percent, maximum number of child NFTs).
-- Accept shill from an existing NFT and will get an child NFT.
-- Claim the profit generated by the NFT you own.
-
-For design details, please see [API document](doc/SparkLink_API.md).
-
-## Getting Started
-
-To install required node.js modules:
-
-```bash
-npm ci
-```
-
-To compile the solidity source code
-
-```bash
-make build
-```
-
-To run unit test:
-
-```bash
-make test
-```
-
-To deploy the smart contract on Ethereum rinkeby testnet:
-
-```bash
-make rinkeby
-```
-
-Note:
-
-- This project is powered by [hardhat](https://hardhat.org/).
-  You can change your network configuration in `hardhat.config.ts` file.
-- Before you deploy a smart contract or interact with a smart contract,
-  you need to set up your wallet private key and [`infura`](https://infura.io/) key in `config.json`.
-
-  `config.json` is a template, which contains dummy configurations.
-
-  Please handle your private key carefully. In this project,
-  `config.json` has already been added into `.gitignore`, as foolproof.
-
-## Deployed Contract Address
-
-| Contract               | Address                |
-| ---------------------- | ---------------------- |
-| [Mainnet][mainnet]     | [0x71872117][71872117] |
-| [BSC][bscscan]         | [0xDc891065][Dc891065] |
-| [Matic][matic]         | [0x166BCdc5][166BCdc5] |
-
-[mainnet]: https://etherscan.io/
-[ropsten]: https://ropsten.etherscan.io
-[bscscan]: https://bscscan.com
-[bsctest]: https://testnet.bscscan.com
-[matic]: https://polygonscan.com
-[mumbai]: https://explorer-mumbai.maticvigil.com
-[166BCdc5]: https://polygonscan.com/address/0x166BCdc53BC8573448F37C66EF409f1Cb31450a2
-[Dc891065]: https://www.bscscan.com/address/0xDc89106504f82642801dc43C8B545Ef7DA95ff2b
-[71872117]: https://etherscan.io/address/0x7187211744c67F8cE89fEAc63b85D8D17417bDfE
-
-## Contribute
-
-Any contribution is welcomed to make it better.
-
-Had you any questions, please do not hesitate to create an [issue](https://github.com/andy-at-mask/AirPod/issues).
-
-## License
-
-[MIT LICENSE](LICENSE)
diff --git a/contract/abi/SparkLink.json b/contract/abi/SparkLink.json
deleted file mode 100644
index b4d4325..0000000
--- a/contract/abi/SparkLink.json
+++ /dev/null
@@ -1,1359 +0,0 @@
-{
-  "_format": "hh-sol-artifact-1",
-  "contractName": "SparkLink",
-  "sourceName": "contracts/SparkLink.sol",
-  "abi": [
-    {
-      "inputs": [
-        {
-          "internalType": "address",
-          "name": "DAO_router_address01",
-          "type": "address"
-        },
-        {
-          "internalType": "address",
-          "name": "DAO_router_address02",
-          "type": "address"
-        },
-        {
-          "internalType": "address",
-          "name": "uniswapRouterAddress",
-          "type": "address"
-        },
-        {
-          "internalType": "address",
-          "name": "factoryAddress",
-          "type": "address"
-        }
-      ],
-      "stateMutability": "nonpayable",
-      "type": "constructor"
-    },
-    {
-      "anonymous": false,
-      "inputs": [
-        {
-          "indexed": true,
-          "internalType": "address",
-          "name": "owner",
-          "type": "address"
-        },
-        {
-          "indexed": true,
-          "internalType": "address",
-          "name": "approved",
-          "type": "address"
-        },
-        {
-          "indexed": true,
-          "internalType": "uint256",
-          "name": "tokenId",
-          "type": "uint256"
-        }
-      ],
-      "name": "Approval",
-      "type": "event"
-    },
-    {
-      "anonymous": false,
-      "inputs": [
-        {
-          "indexed": true,
-          "internalType": "address",
-          "name": "owner",
-          "type": "address"
-        },
-        {
-          "indexed": true,
-          "internalType": "address",
-          "name": "operator",
-          "type": "address"
-        },
-        {
-          "indexed": false,
-          "internalType": "bool",
-          "name": "approved",
-          "type": "bool"
-        }
-      ],
-      "name": "ApprovalForAll",
-      "type": "event"
-    },
-    {
-      "anonymous": false,
-      "inputs": [
-        {
-          "indexed": true,
-          "internalType": "uint64",
-          "name": "NFT_id",
-          "type": "uint64"
-        },
-        {
-          "indexed": true,
-          "internalType": "address",
-          "name": "receiver",
-          "type": "address"
-        },
-        {
-          "indexed": false,
-          "internalType": "uint128",
-          "name": "amount",
-          "type": "uint128"
-        }
-      ],
-      "name": "Claim",
-      "type": "event"
-    },
-    {
-      "anonymous": false,
-      "inputs": [
-        {
-          "indexed": true,
-          "internalType": "uint64",
-          "name": "NFT_id",
-          "type": "uint64"
-        },
-        {
-          "indexed": false,
-          "internalType": "uint128",
-          "name": "transfer_price",
-          "type": "uint128"
-        }
-      ],
-      "name": "DeterminePrice",
-      "type": "event"
-    },
-    {
-      "anonymous": false,
-      "inputs": [
-        {
-          "indexed": true,
-          "internalType": "uint64",
-          "name": "NFT_id",
-          "type": "uint64"
-        },
-        {
-          "indexed": false,
-          "internalType": "uint128",
-          "name": "transfer_price",
-          "type": "uint128"
-        },
-        {
-          "indexed": true,
-          "internalType": "address",
-          "name": "to",
-          "type": "address"
-        }
-      ],
-      "name": "DeterminePriceAndApprove",
-      "type": "event"
-    },
-    {
-      "anonymous": false,
-      "inputs": [
-        {
-          "indexed": true,
-          "internalType": "uint64",
-          "name": "NFT_id",
-          "type": "uint64"
-        },
-        {
-          "indexed": false,
-          "internalType": "string",
-          "name": "content",
-          "type": "string"
-        }
-      ],
-      "name": "Label",
-      "type": "event"
-    },
-    {
-      "anonymous": false,
-      "inputs": [
-        {
-          "indexed": true,
-          "internalType": "address",
-          "name": "previousOwner",
-          "type": "address"
-        },
-        {
-          "indexed": true,
-          "internalType": "address",
-          "name": "newOwner",
-          "type": "address"
-        }
-      ],
-      "name": "OwnershipTransferred",
-      "type": "event"
-    },
-    {
-      "anonymous": false,
-      "inputs": [
-        {
-          "indexed": true,
-          "internalType": "address",
-          "name": "publisher",
-          "type": "address"
-        },
-        {
-          "indexed": true,
-          "internalType": "uint64",
-          "name": "rootNFTId",
-          "type": "uint64"
-        },
-        {
-          "indexed": false,
-          "internalType": "address",
-          "name": "token_addr",
-          "type": "address"
-        }
-      ],
-      "name": "Publish",
-      "type": "event"
-    },
-    {
-      "anonymous": false,
-      "inputs": [
-        {
-          "indexed": false,
-          "internalType": "uint8",
-          "name": "old_DAO_fee",
-          "type": "uint8"
-        },
-        {
-          "indexed": false,
-          "internalType": "uint8",
-          "name": "new_DAO_fee",
-          "type": "uint8"
-        }
-      ],
-      "name": "SetDAOFee",
-      "type": "event"
-    },
-    {
-      "anonymous": false,
-      "inputs": [
-        {
-          "indexed": false,
-          "internalType": "address",
-          "name": "old_router_address",
-          "type": "address"
-        },
-        {
-          "indexed": false,
-          "internalType": "address",
-          "name": "new_router_address",
-          "type": "address"
-        }
-      ],
-      "name": "SetDAORouter01",
-      "type": "event"
-    },
-    {
-      "anonymous": false,
-      "inputs": [
-        {
-          "indexed": false,
-          "internalType": "address",
-          "name": "old_router_address",
-          "type": "address"
-        },
-        {
-          "indexed": false,
-          "internalType": "address",
-          "name": "new_router_address",
-          "type": "address"
-        }
-      ],
-      "name": "SetDAORouter02",
-      "type": "event"
-    },
-    {
-      "anonymous": false,
-      "inputs": [
-        {
-          "indexed": false,
-          "internalType": "uint8",
-          "name": "old_loss_ratio",
-          "type": "uint8"
-        },
-        {
-          "indexed": false,
-          "internalType": "uint8",
-          "name": "new_loss_ratio",
-          "type": "uint8"
-        }
-      ],
-      "name": "SetLoosRatio",
-      "type": "event"
-    },
-    {
-      "anonymous": false,
-      "inputs": [
-        {
-          "indexed": true,
-          "internalType": "uint64",
-          "name": "NFT_id",
-          "type": "uint64"
-        },
-        {
-          "indexed": false,
-          "internalType": "bytes32",
-          "name": "old_URI",
-          "type": "bytes32"
-        },
-        {
-          "indexed": false,
-          "internalType": "bytes32",
-          "name": "new_URI",
-          "type": "bytes32"
-        }
-      ],
-      "name": "SetURI",
-      "type": "event"
-    },
-    {
-      "anonymous": false,
-      "inputs": [
-        {
-          "indexed": true,
-          "internalType": "address",
-          "name": "from",
-          "type": "address"
-        },
-        {
-          "indexed": true,
-          "internalType": "address",
-          "name": "to",
-          "type": "address"
-        },
-        {
-          "indexed": true,
-          "internalType": "uint256",
-          "name": "tokenId",
-          "type": "uint256"
-        }
-      ],
-      "name": "Transfer",
-      "type": "event"
-    },
-    {
-      "inputs": [],
-      "name": "DAO_fee",
-      "outputs": [
-        {
-          "internalType": "uint8",
-          "name": "",
-          "type": "uint8"
-        }
-      ],
-      "stateMutability": "view",
-      "type": "function"
-    },
-    {
-      "inputs": [],
-      "name": "DAO_router01",
-      "outputs": [
-        {
-          "internalType": "address",
-          "name": "",
-          "type": "address"
-        }
-      ],
-      "stateMutability": "view",
-      "type": "function"
-    },
-    {
-      "inputs": [],
-      "name": "DAO_router02",
-      "outputs": [
-        {
-          "internalType": "address",
-          "name": "",
-          "type": "address"
-        }
-      ],
-      "stateMutability": "view",
-      "type": "function"
-    },
-    {
-      "inputs": [],
-      "name": "MAX_DAO_FEE",
-      "outputs": [
-        {
-          "internalType": "uint8",
-          "name": "",
-          "type": "uint8"
-        }
-      ],
-      "stateMutability": "view",
-      "type": "function"
-    },
-    {
-      "inputs": [],
-      "name": "MAX_LOSS_RATIO",
-      "outputs": [
-        {
-          "internalType": "uint8",
-          "name": "",
-          "type": "uint8"
-        }
-      ],
-      "stateMutability": "view",
-      "type": "function"
-    },
-    {
-      "inputs": [
-        {
-          "internalType": "uint64",
-          "name": "_NFT_id",
-          "type": "uint64"
-        }
-      ],
-      "name": "acceptShill",
-      "outputs": [],
-      "stateMutability": "payable",
-      "type": "function"
-    },
-    {
-      "inputs": [
-        {
-          "internalType": "address",
-          "name": "to",
-          "type": "address"
-        },
-        {
-          "internalType": "uint256",
-          "name": "tokenId",
-          "type": "uint256"
-        }
-      ],
-      "name": "approve",
-      "outputs": [],
-      "stateMutability": "nonpayable",
-      "type": "function"
-    },
-    {
-      "inputs": [
-        {
-          "internalType": "address",
-          "name": "owner",
-          "type": "address"
-        }
-      ],
-      "name": "balanceOf",
-      "outputs": [
-        {
-          "internalType": "uint256",
-          "name": "",
-          "type": "uint256"
-        }
-      ],
-      "stateMutability": "view",
-      "type": "function"
-    },
-    {
-      "inputs": [
-        {
-          "internalType": "uint64",
-          "name": "_NFT_id",
-          "type": "uint64"
-        }
-      ],
-      "name": "claimProfit",
-      "outputs": [],
-      "stateMutability": "nonpayable",
-      "type": "function"
-    },
-    {
-      "inputs": [
-        {
-          "internalType": "uint64",
-          "name": "_NFT_id",
-          "type": "uint64"
-        },
-        {
-          "internalType": "uint128",
-          "name": "_price",
-          "type": "uint128"
-        }
-      ],
-      "name": "determinePrice",
-      "outputs": [],
-      "stateMutability": "nonpayable",
-      "type": "function"
-    },
-    {
-      "inputs": [
-        {
-          "internalType": "uint64",
-          "name": "_NFT_id",
-          "type": "uint64"
-        },
-        {
-          "internalType": "uint128",
-          "name": "_price",
-          "type": "uint128"
-        },
-        {
-          "internalType": "address",
-          "name": "_to",
-          "type": "address"
-        }
-      ],
-      "name": "determinePriceAndApprove",
-      "outputs": [],
-      "stateMutability": "nonpayable",
-      "type": "function"
-    },
-    {
-      "inputs": [
-        {
-          "internalType": "uint256",
-          "name": "tokenId",
-          "type": "uint256"
-        }
-      ],
-      "name": "getApproved",
-      "outputs": [
-        {
-          "internalType": "address",
-          "name": "",
-          "type": "address"
-        }
-      ],
-      "stateMutability": "view",
-      "type": "function"
-    },
-    {
-      "inputs": [
-        {
-          "internalType": "uint64",
-          "name": "_NFT_id",
-          "type": "uint64"
-        }
-      ],
-      "name": "getDepthByNFTId",
-      "outputs": [
-        {
-          "internalType": "uint64",
-          "name": "",
-          "type": "uint64"
-        }
-      ],
-      "stateMutability": "view",
-      "type": "function"
-    },
-    {
-      "inputs": [
-        {
-          "internalType": "uint64",
-          "name": "_NFT_id",
-          "type": "uint64"
-        }
-      ],
-      "name": "getEditionIdByNFTId",
-      "outputs": [
-        {
-          "internalType": "uint32",
-          "name": "",
-          "type": "uint32"
-        }
-      ],
-      "stateMutability": "pure",
-      "type": "function"
-    },
-    {
-      "inputs": [
-        {
-          "internalType": "uint64",
-          "name": "_NFT_id",
-          "type": "uint64"
-        }
-      ],
-      "name": "getFatherByNFTId",
-      "outputs": [
-        {
-          "internalType": "uint64",
-          "name": "",
-          "type": "uint64"
-        }
-      ],
-      "stateMutability": "view",
-      "type": "function"
-    },
-    {
-      "inputs": [
-        {
-          "internalType": "uint64",
-          "name": "_NFT_id",
-          "type": "uint64"
-        }
-      ],
-      "name": "getIsFreeByNFTId",
-      "outputs": [
-        {
-          "internalType": "bool",
-          "name": "",
-          "type": "bool"
-        }
-      ],
-      "stateMutability": "view",
-      "type": "function"
-    },
-    {
-      "inputs": [
-        {
-          "internalType": "uint64",
-          "name": "_NFT_id",
-          "type": "uint64"
-        }
-      ],
-      "name": "getIsNCByNFTId",
-      "outputs": [
-        {
-          "internalType": "bool",
-          "name": "",
-          "type": "bool"
-        }
-      ],
-      "stateMutability": "view",
-      "type": "function"
-    },
-    {
-      "inputs": [
-        {
-          "internalType": "uint64",
-          "name": "_NFT_id",
-          "type": "uint64"
-        }
-      ],
-      "name": "getIsNDByNFTId",
-      "outputs": [
-        {
-          "internalType": "bool",
-          "name": "",
-          "type": "bool"
-        }
-      ],
-      "stateMutability": "view",
-      "type": "function"
-    },
-    {
-      "inputs": [],
-      "name": "getLossRatio",
-      "outputs": [
-        {
-          "internalType": "uint8",
-          "name": "",
-          "type": "uint8"
-        }
-      ],
-      "stateMutability": "view",
-      "type": "function"
-    },
-    {
-      "inputs": [
-        {
-          "internalType": "uint64",
-          "name": "_NFT_id",
-          "type": "uint64"
-        }
-      ],
-      "name": "getNFTInfoByNFTID",
-      "outputs": [
-        {
-          "internalType": "uint64",
-          "name": "issue_information",
-          "type": "uint64"
-        },
-        {
-          "internalType": "uint64",
-          "name": "father_id",
-          "type": "uint64"
-        },
-        {
-          "internalType": "uint128",
-          "name": "shill_price",
-          "type": "uint128"
-        },
-        {
-          "internalType": "uint16",
-          "name": "remain_shill_times",
-          "type": "uint16"
-        },
-        {
-          "internalType": "uint128",
-          "name": "profit",
-          "type": "uint128"
-        },
-        {
-          "internalType": "string",
-          "name": "metadata",
-          "type": "string"
-        }
-      ],
-      "stateMutability": "view",
-      "type": "function"
-    },
-    {
-      "inputs": [
-        {
-          "internalType": "uint64",
-          "name": "_NFT_id",
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-  "linkReferences": {},
-  "deployedLinkReferences": {}
-}
diff --git a/contract/chain.sample.ts b/contract/chain.sample.ts
deleted file mode 100644
index 94a12fb..0000000
--- a/contract/chain.sample.ts
+++ /dev/null
@@ -1,11 +0,0 @@
-export default {
-    defaultNetwork: "hardhat",
-    networks: {
-        hardhat: {
-        },
-        rinkeby: {
-            url: "https://rinkeby.infura.io/v3/xxxxxxx",
-            accounts: ["0xFFFFFFFFFFFFFFFFFFFFFFFFF"]
-        }
-    }
-}
\ No newline at end of file
diff --git a/contract/contracts/IERC721.sol b/contract/contracts/IERC721.sol
deleted file mode 100644
index 852ac3c..0000000
--- a/contract/contracts/IERC721.sol
+++ /dev/null
@@ -1,142 +0,0 @@
-// SPDX-License-Identifier: MIT
-
-pragma solidity >= 0.8.0;
-
-import "@openzeppelin/contracts/utils/introspection/IERC165.sol";
-
-/// @title ERC-721 Non-Fungible Token Standard
-/// @dev See https://eips.ethereum.org/EIPS/eip-721
-///  Note: the ERC-165 identifier for this interface is 0x80ac58cd.
-interface IERC721 is IERC165 {
-     /**
-     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
-     */
-    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
-
-    /**
-     * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
-     */
-    event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
-
-    /**
-     * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
-     */
-    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
-
-    /**
-     * @dev Returns the number of tokens in ``owner``'s account.
-     */
-    function balanceOf(address owner) external view returns (uint256 balance);
-
-    /**
-     * @dev Returns the owner of the `tokenId` token.
-     *
-     * Requirements:
-     *
-     * - `tokenId` must exist.
-     */
-    function ownerOf(uint256 tokenId) external view returns (address owner);
-
-    /**
-     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
-     * are aware of the ERC721 protocol to prevent tokens from being forever locked.
-     *
-     * Requirements:
-     *
-     * - `from` cannot be the zero address.
-     * - `to` cannot be the zero address.
-     * - `tokenId` token must exist and be owned by `from`.
-     * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
-     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
-     *
-     * Emits a {Transfer} event.
-     */
-    function safeTransferFrom(
-        address from,
-        address to,
-        uint256 tokenId
-    ) payable external;
-
-    /**
-     * @dev Transfers `tokenId` token from `from` to `to`.
-     *
-     * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
-     *
-     * Requirements:
-     *
-     * - `from` cannot be the zero address.
-     * - `to` cannot be the zero address.
-     * - `tokenId` token must be owned by `from`.
-     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
-     *
-     * Emits a {Transfer} event.
-     */
-    function transferFrom(
-        address from,
-        address to,
-        uint256 tokenId
-    ) payable external;
-
-    /**
-     * @dev Gives permission to `to` to transfer `tokenId` token to another account.
-     * The approval is cleared when the token is transferred.
-     *
-     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.
-     *
-     * Requirements:
-     *
-     * - The caller must own the token or be an approved operator.
-     * - `tokenId` must exist.
-     *
-     * Emits an {Approval} event.
-     */
-    function approve(address to, uint256 tokenId) external;
-
-    /**
-     * @dev Returns the account approved for `tokenId` token.
-     *
-     * Requirements:
-     *
-     * - `tokenId` must exist.
-     */
-    function getApproved(uint256 tokenId) external view returns (address operator);
-
-    /**
-     * @dev Approve or remove `operator` as an operator for the caller.
-     * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
-     *
-     * Requirements:
-     *
-     * - The `operator` cannot be the caller.
-     *
-     * Emits an {ApprovalForAll} event.
-     */
-    function setApprovalForAll(address operator, bool _approved) external;
-
-    /**
-     * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
-     *
-     * See {setApprovalForAll}
-     */
-    function isApprovedForAll(address owner, address operator) external view returns (bool);
-
-    /**
-     * @dev Safely transfers `tokenId` token from `from` to `to`.
-     *
-     * Requirements:
-     *
-     * - `from` cannot be the zero address.
-     * - `to` cannot be the zero address.
-     * - `tokenId` token must exist and be owned by `from`.
-     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
-     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
-     *
-     * Emits a {Transfer} event.
-     */
-    function safeTransferFrom(
-        address from,
-        address to,
-        uint256 tokenId,
-        bytes calldata data
-    ) payable external;
-}
diff --git a/contract/contracts/IERC721Metadata.sol b/contract/contracts/IERC721Metadata.sol
deleted file mode 100644
index dc42af1..0000000
--- a/contract/contracts/IERC721Metadata.sol
+++ /dev/null
@@ -1,26 +0,0 @@
-// SPDX-License-Identifier: MIT
-
-pragma solidity ^0.8.0;
-
-import "./IERC721.sol";
-
-/**
- * @title ERC-721 Non-Fungible Token Standard, optional metadata extension
- * @dev See https://eips.ethereum.org/EIPS/eip-721
- */
-interface IERC721Metadata is IERC721 {
-    /**
-     * @dev Returns the token collection name.
-     */
-    function name() external view returns (string memory);
-
-    /**
-     * @dev Returns the token collection symbol.
-     */
-    function symbol() external view returns (string memory);
-
-    /**
-     * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
-     */
-    function tokenURI(uint256 tokenId) external view returns (string memory);
-}
diff --git a/contract/contracts/IERC721Receiver.sol b/contract/contracts/IERC721Receiver.sol
deleted file mode 100644
index 9683f4a..0000000
--- a/contract/contracts/IERC721Receiver.sol
+++ /dev/null
@@ -1,26 +0,0 @@
-// SPDX-License-Identifier: MIT
-
-pragma solidity ^0.8.0;
-
-/**
- * @title ERC721 token receiver interface
- * @dev Interface for any contract that wants to support safeTransfers
- * from ERC721 asset contracts.
- */
-interface IERC721Receiver {
-    /**
-     * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
-     * by `operator` from `from`, this function is called.
-     *
-     * It must return its Solidity selector to confirm the token transfer.
-     * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
-     *
-     * The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
-     */
-    function onERC721Received(
-        address operator,
-        address from,
-        uint256 tokenId,
-        bytes calldata data
-    ) external returns (bytes4);
-}
diff --git a/contract/contracts/SparkLink.sol b/contract/contracts/SparkLink.sol
deleted file mode 100644
index bae80a3..0000000
--- a/contract/contracts/SparkLink.sol
+++ /dev/null
@@ -1,1169 +0,0 @@
-// SPDX-License-Identifier: MIT
-
-pragma solidity >= 0.8.4;
-
-import "./IERC721Receiver.sol";
-import "./IERC721Metadata.sol";
-import "@openzeppelin/contracts/utils/Counters.sol";
-import "@openzeppelin/contracts/utils/Address.sol";
-import "@openzeppelin/contracts/utils/Context.sol";
-import "@openzeppelin/contracts/utils/Strings.sol";
-import "@openzeppelin/contracts/utils/introspection/ERC165.sol";
-import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
-import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
-import "@openzeppelin/contracts/access/Ownable.sol";
-import "@uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router02.sol";
-import "@uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router01.sol";
-import '@uniswap/v2-core/contracts/interfaces/IUniswapV2Factory.sol';
-contract SparkLink is Ownable, ERC165, IERC721, IERC721Metadata{
-    using Address for address;
-    using Counters for Counters.Counter;
-    using SafeERC20 for IERC20;
-    Counters.Counter private _issueIds;
-    /*
-    Abstract struct Issue {
-        uint32 total_amount;
-        bool is_free
-        bool is_ND;
-        bool is_NC;
-        uint16 shill_times;
-        uint8 royalty_fee;
-    }
-    This structure records some common attributes of a series of NFTs:
-        - `royalty_fee`: the proportion of royaltyes
-        - `shill_times`: the number of times a single NFT can been shared
-        - `total_amount`: the total number of NFTs in the series
-    To reduce gas cost, this structure is actually stored in the `father_id` attibute of root NFT
-        - 0~31  `total_amount`
-        - 37 `is_free`
-        - 38 `is_NC`
-        - 39 `is_ND`
-        - 40~55 `shill_times`
-        - 56~63 `royalty_fee`
-    */
-
-    struct Edition {
-        // This structure stores NFT related information:
-        //  - `father_id`: For root NFT it stores issue abstract sturcture
-        //                 For other NFTs its stores the NFT Id of which NFT it `acceptShill` from
-        // - `shill_price`: The price should be paid when others `accpetShill` from this NFT
-        // - remaining_shill_times: The initial value is the shilltimes of the issue it belongs to
-        //                       When others `acceptShill` from this NFT, it will subtract one until its value is 0  
-        // - `owner`: record the owner of this NFT
-        // - `ipfs_hash`: IPFS hash value of the URI where this NTF's metadata stores
-        // - `transfer_price`: The initial value is zero
-        //                   Set by `determinePrice` or `determinePriceAndApprove` before `transferFrom`
-        //                   It will be checked wether equal to msg.value when `transferFrom` is called
-        //                   After `transferFrom` this value will be set to zero
-        // - `profit`: record the profit owner can claim (include royalty fee it should conduct to its father NFT)
-        uint64 father_id;
-        uint128 shill_price;
-        uint16 remaining_shill_times;
-        address owner;
-        bytes32 ipfs_hash;
-        uint128 transfer_price;
-        uint128 profit;
-    }
-
-    // Emit when `determinePrice` success
-    event DeterminePrice(
-        uint64 indexed NFT_id,
-        uint128 transfer_price
-    );
-
-    // Emit when `determinePriceAndApprove` success
-    event DeterminePriceAndApprove(
-        uint64 indexed NFT_id,
-        uint128 transfer_price,
-        address indexed to
-    );
-
-    // Emit when `publish` success
-    // - `rootNFTId`: Record the Id of root NFT given to publisher 
-    event Publish(
-        address indexed publisher,
-        uint64  indexed rootNFTId,
-        address token_addr
-    );
-
-    // Emit when claimProfit success
-    //- `amount`: Record the actual amount owner of this NFT received (profit - profit*royalty_fee/100)
-    event Claim(
-        uint64 indexed NFT_id,
-        address indexed receiver,
-        uint128 amount
-    );
-    // Emit when setURI success
-    event SetURI(
-        uint64 indexed NFT_id,
-        bytes32 old_URI,
-        bytes32 new_URI
-    );
-
-    event Label(
-        uint64 indexed NFT_id,
-        string content
-    );
-
-    event SetDAOFee(
-        uint8 old_DAO_fee,
-        uint8 new_DAO_fee
-    );
-
-    event SetLoosRatio(
-        uint8 old_loss_ratio,
-        uint8 new_loss_ratio
-    );
-
-    event SetDAORouter01(
-        address old_router_address,
-        address new_router_address
-    );
-
-    event SetDAORouter02(
-        address old_router_address,
-        address new_router_address
-    );
-
-    //----------------------------------------------------------------------------------------------------
-    /**
-     * @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
-     */
-    constructor(address DAO_router_address01,address DAO_router_address02, address uniswapRouterAddress, address factoryAddress) {
-        uniswapV2Router =  IUniswapV2Router02(uniswapRouterAddress);
-        uniswapV2Factory = IUniswapV2Factory(factoryAddress);
-        DAO_router01 = DAO_router_address01;
-        DAO_router02 = DAO_router_address02;
-        _name = "SparkLink";
-        _symbol = "SPL";
-    } 
-    
-   /**
-     * @dev Create a issue and mint a root NFT for buyer acceptShill from
-     *
-     * Requirements:
-     *
-     * - `_first_sell_price`: The price should be paid when others `accpetShill` from this NFT
-     * - `_royalty_fee`: The proportion of royaltyes, it represents the ratio of the father NFT's profit from the child NFT
-     *                   Its value should <= 100
-     * - `_shill_times`: the number of times a single NFT can been shared
-     *                   Its value should <= 65536
-     * - `_ipfs_hash`: IPFS hash value of the URI where this NTF's metadata stores
-     *
-     * - `token_address`: list of tokens(address) can be accepted for payment.
-     *                 `A token address` can be ERC-20 token contract address or `address(0)`(ETH).
-     *
-     * - `_is_free`:
-     * - `_is_NC`: 
-     * 
-     * - `_is_ND`: 
-     * Emits a {Publish} event.
-     * - Emitted {Publish} event contains root NFT id.
-     */
-    function publish(
-        uint128 _first_sell_price,
-        uint8 _royalty_fee,
-        uint16 _shill_times,
-        bytes32 _ipfs_hash,
-        address _token_addr,
-        bool _is_free,
-        bool _is_NC,
-        bool _is_ND
-    ) 
-        external 
-    {
-        require(_royalty_fee <= 100, "SparkLink: Royalty fee should be <= 100%.");
-        _issueIds.increment();
-        require(_issueIds.current() <= type(uint32).max, "SparkLink: Value doesn't fit in 32 bits.");
-        if (_token_addr != address(0))
-            require(IERC20(_token_addr).totalSupply() > 0, "Not a valid ERC20 token address");
-        uint32 new_issue_id = uint32(_issueIds.current());
-        uint64 rootNFTId = getNftIdByEditionIdAndIssueId(new_issue_id, 1);
-        require(
-            _checkOnERC721Received(address(0), msg.sender, rootNFTId, ""),
-            "SparkLink: Transfer to non ERC721Receiver implementer"
-        );
-
-        Edition storage new_NFT = editions_by_id[rootNFTId];
-        uint64 information;
-        information = reWriteUint8InUint64(56, _royalty_fee, information);
-        information = reWriteUint16InUint64(40, _shill_times, information);
-        information = reWriteBoolInUint64(37, _is_free, information);
-        information = reWriteBoolInUint64(38, _is_NC, information);
-        information = reWriteBoolInUint64(39, _is_ND, information);
-        information += 1;
-        token_addresses[new_issue_id] = _token_addr;
-        new_NFT.father_id = information;
-        new_NFT.remaining_shill_times = _shill_times;
-        new_NFT.shill_price = _first_sell_price;
-        new_NFT.owner = msg.sender;
-        new_NFT.ipfs_hash = _ipfs_hash;
-        _balances[msg.sender] += 1;
-        emit Transfer(address(0), msg.sender, rootNFTId);
-        emit Publish(
-            msg.sender,
-            rootNFTId,
-            _token_addr
-        );
-    }
-
-    /**
-     * @dev Buy a child NFT from the _NFT_id buyer input
-     *
-     * Requirements:
-     *
-     * - `_NFT_id`: _NFT_id the father NFT id buyer mint NFT from
-     *              remain shill times of the NFT_id you input should greater than 0
-     * Emits a {Ttansfer} event.
-     * - Emitted {Transfer} event from 0x0 address to msg.sender, contain new NFT id.
-     * - New NFT id will be generater by edition id and issue id
-     *   0~31 edition id
-     *   32~63 issue id
-     */
-    function acceptShill(
-        uint64 _NFT_id
-    ) 
-        external 
-        payable 
-    {
-        require(isEditionExisting(_NFT_id), "SparkLink: This NFT does not exist");
-        require(editions_by_id[_NFT_id].remaining_shill_times > 0, "SparkLink: There is no remaining shill time for this NFT");
-        if (!isRootNFT(_NFT_id)||!getIsFreeByNFTId(_NFT_id)){
-            address token_addr = getTokenAddrByNFTId(_NFT_id);
-            if (token_addr == address(0)){
-                require(msg.value == editions_by_id[_NFT_id].shill_price, "SparkLink: Wrong price");
-                _addProfit( _NFT_id, editions_by_id[_NFT_id].shill_price);
-            }
-            else {
-                uint256 before_balance = IERC20(token_addr).balanceOf(address(this));
-                IERC20(token_addr).safeTransferFrom(msg.sender, address(this), editions_by_id[_NFT_id].shill_price);
-                _addProfit( _NFT_id, uint256toUint128(IERC20(token_addr).balanceOf(address(this))-before_balance));
-            }
-        }
-        editions_by_id[_NFT_id].remaining_shill_times -= 1;
-        _mintNFT(_NFT_id, msg.sender);
-        if (editions_by_id[_NFT_id].remaining_shill_times == 0)
-            _mintNFT(_NFT_id, ownerOf(_NFT_id));
-    }
-
-    /**
-     * @dev Transfers `tokenId` token from `from` to `to`.
-     *      
-     * Requirements:
-     *
-     * - `from` cannot be the zero address.
-     * - `to` cannot be the zero address.
-     * - `tokenId` token must be owned by `from`.
-     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
-     * - If `transfer_price` has been set, caller should give same value in msg.sender.
-     * - Will call `claimProfit` before transfer and `transfer_price` will be set to zero after transfer. 
-     * Emits a {TransferAsset} events
-     */
-    function transferFrom(address from, address to, uint256 tokenId) external payable override {
-        _transfer(from, to, uint256toUint64(tokenId));
-    }
-
-    function safeTransferFrom(address from, address to, uint256 tokenId) external payable override{
-       _safeTransfer(from, to, uint256toUint64(tokenId), "");
-    }
-
-    function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata _data) external payable override {
-        _safeTransfer(from, to, uint256toUint64(tokenId), _data);
-    }
-    
-    /**
-     * @dev Claim profit from reward pool of NFT.
-     *      
-     * Requirements:
-     *
-     * - `_NFT_id`: The NFT id of NFT caller claim, the profit will give to its owner.
-     * - If its profit is zero the event {Claim} will not be emited.
-     * Emits a {Claim} events
-     */
-    function claimProfit(uint64 _NFT_id) public {
-        require(isEditionExisting(_NFT_id), "SparkLink: This edition does not exist");
-        
-        if (editions_by_id[_NFT_id].profit != 0) {
-            uint128 amount = editions_by_id[_NFT_id].profit;
-            address token_addr = getTokenAddrByNFTId(_NFT_id);
-            if (DAO_fee != 0) {
-                uint128 DAO_amount = calculateFee(amount, DAO_fee);
-                amount -= DAO_amount;
-                if (token_addr == address(0)) {
-                    payable(DAO_router01).transfer(DAO_amount);
-                }
-                else if (uniswapV2Factory.getPair(token_addr, uniswapV2Router.WETH()) == address(0)) {
-                    IERC20(token_addr).safeTransfer(DAO_router02,DAO_amount);
-                }
-                else {
-                    _swapTokensForEth(token_addr, DAO_amount);
-                }
-            }
-            editions_by_id[_NFT_id].profit = 0;
-            if (!isRootNFT(_NFT_id)) {
-                uint128 _royalty_fee = calculateFee(amount, getRoyaltyFeeByNFTId(_NFT_id));
-                _addProfit(getFatherByNFTId(_NFT_id), _royalty_fee);
-                amount -= _royalty_fee;
-            }
-            if (token_addr == address(0)){
-                payable(ownerOf(_NFT_id)).transfer(amount);
-            }
-            else {
-                IERC20(token_addr).safeTransfer(ownerOf(_NFT_id), amount);
-            }
-            emit Claim(
-                _NFT_id,
-                ownerOf(_NFT_id),
-                amount
-            );
-        }
-    }
-
-    /**
-     * @dev Set token URI.
-     *
-     * Requirements:
-     *
-     * - `_NFT_id`: transferred token id.
-     * - `ipfs_hash`: ipfs hash value of the URI will be set.
-     * Emits a {SetURI} events
-     */
-    function setURI(uint64 _NFT_id, bytes32 ipfs_hash) public {
-        if (getIsNDByNFTId(_NFT_id)) {
-            require(_NFT_id == getRootNFTIdByNFTId(_NFT_id), "SparkLink: NFT follows the ND protocol, only the root NFT's URI can be set.");
-        }
-        require(ownerOf(_NFT_id) == msg.sender, "SparkLink: Only owner can set the token URI");
-        _setTokenURI(_NFT_id, ipfs_hash);
-    }
-
-     /**
-     * @dev update token URI.
-     *
-     * Requirements:
-     *
-     * - `_NFT_id`: transferred token id.
-     */
-    function updateURI(uint64 _NFT_id) public{
-        require(ownerOf(_NFT_id) == msg.sender, "SparkLink: Only owner can update the token URI");
-        editions_by_id[_NFT_id].ipfs_hash = editions_by_id[getRootNFTIdByNFTId(_NFT_id)].ipfs_hash;
-    }
-
-    function label(uint64 _NFT_id, string memory content) public {
-        require(ownerOf(_NFT_id) == msg.sender, "SparkLink: Only owner can label this NFT");
-        emit Label(_NFT_id, content);
-    }
-    /**
-     * @dev Determine NFT price before transfer.
-     *
-     * Requirements:
-     *
-     * - `_NFT_id`: transferred token id.
-     * - `_price`: The amount of ETH should be payed for `_NFT_id`
-     * Emits a {DeterminePrice} events
-     */
-    function determinePrice(
-        uint64 _NFT_id,
-        uint128 _price
-    ) 
-        public 
-    {
-        require(isEditionExisting(_NFT_id), "SparkLink: This NFT does not exist");
-        require(msg.sender == ownerOf(_NFT_id), "SparkLink: Only owner can set the price");
-        editions_by_id[_NFT_id].transfer_price = _price;
-        emit DeterminePrice(_NFT_id, _price);
-    }
-
-    /**
-     * @dev Determine NFT price before transfer.
-     *
-     * Requirements:
-     *
-     * - `_NFT_id`: transferred token id.
-     * - `_price`: The amount of ETH should be payed for `_NFT_id`
-     * - `_to`: The account address `approve` to. 
-     * Emits a {DeterminePriceAndApprove} events
-     */
-    function determinePriceAndApprove(
-        uint64 _NFT_id,
-        uint128 _price,
-        address _to
-    ) 
-        public 
-    {
-        determinePrice(_NFT_id, _price);
-        approve(_to, _NFT_id);
-        emit DeterminePriceAndApprove(_NFT_id, _price, _to);
-    }
-
-    function setDAOFee(uint8 _DAO_fee) public onlyOwner {
-        require(_DAO_fee <= MAX_DAO_FEE, "SparkLink: DAO fee can not exceed 5%");
-        emit SetDAOFee(DAO_fee, _DAO_fee);
-        DAO_fee = _DAO_fee;
-    }
-
-    function setDAORouter01(address _DAO_router01) public onlyOwner {
-        emit SetDAORouter01(DAO_router01, _DAO_router01);
-        DAO_router01 = _DAO_router01;
-    }
-
-    function setDAORouter02(address _DAO_router02) public onlyOwner {
-        emit SetDAORouter01(DAO_router02, _DAO_router02);
-        DAO_router02 = _DAO_router02;
-    }
-
-    function setUniswapV2Router(address _uniswapV2Router) public onlyOwner {
-        uniswapV2Router =  IUniswapV2Router02(_uniswapV2Router);
-    }
-    function setUniswapV2Factory(address _uniswapV2Factory) public onlyOwner {
-        uniswapV2Factory = IUniswapV2Factory(_uniswapV2Factory);
-    }
-
-    function setLoosRatio(uint8 _loss_ratio) public onlyOwner {
-        require(_loss_ratio <= MAX_LOSS_RATIO, "SparkLink: Loss ratio can not below 50%");
-        emit SetLoosRatio(loss_ratio, _loss_ratio);
-        loss_ratio = _loss_ratio;
-    }
-    /**
-     * @dev See {IERC721-approve}.
-     */
-    function approve(address to, uint256 tokenId) public virtual override {
-        address owner = ownerOf(tokenId);
-        require(to != owner, "SparkLink: Approval to current owner");
-        require(
-            _msgSender() == owner || isApprovedForAll(owner, _msgSender()),
-            "SparkLink: Approve caller is not owner nor approved for all"
-        );
-
-        _approve(to, uint256toUint64(tokenId));
-    }
-
-    /**
-     * @dev See {IERC721-setApprovalForAll}.
-     */
-    function setApprovalForAll(address operator, bool approved) public virtual override {
-        require(operator != _msgSender(), "SparkLink: Approve to caller");
-        _operatorApprovals[_msgSender()][operator] = approved;
-        emit ApprovalForAll(_msgSender(), operator, approved);
-    }
-
-    /**
-     * @dev See {IERC165-supportsInterface}.
-     */
-    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
-        return
-            interfaceId == type(IERC721).interfaceId ||
-            interfaceId == type(IERC721Metadata).interfaceId ||
-            super.supportsInterface(interfaceId);
-    }
-
-    /**
-     * @dev See {IERC721-balanceOf}.
-     */
-    function balanceOf(address owner) public view virtual override returns (uint256) {
-        require(owner != address(0), "SparkLink: Balance query for the zero address");
-        return _balances[owner];
-    }
-
-    /**
-     * @dev See {IERC721-ownerOf}.
-     */
-    function ownerOf(uint256 tokenId) public view virtual override returns (address) {
-        address owner = editions_by_id[uint256toUint64(tokenId)].owner;
-        require(owner != address(0), "SparkLink: Owner query for nonexistent token");
-        return owner;
-    }
-
-    /**
-     *                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        @dev See {IERC721Metadata-name}.
-     */
-    function name() public view virtual override returns (string memory) {
-        return _name;
-    }
-
-    /**
-     * @dev See {IERC721Metadata-symbol}.
-     */
-    function symbol() public view virtual override returns (string memory) {
-        return _symbol;
-    }
-    
-    /**
-     * @dev Query NFT information set.
-     *
-     * Requirements:
-     * - `_NFT_id`: The id of the edition queryed.
-     * Return :
-     * - `issue_information`: For root NFT it stores issue abstract sturcture
-     * - 0~31   `total_amount`
-     * - 37     `is_free`
-     * - 38     `is_NC`
-     * - 39     `is_ND`
-     * - 40~55  `shill_times`
-     * - 56~63 `royalty_fee`
-     * - `father_id`: For root NFT it stores issue abstract sturcture
-     *                For other NFTs its stores the NFT Id of which NFT it `acceptShill` from
-     * - `shill_price`: The price should be paid when others `accpetShill` from this NFT
-     * - `remaining_shill_times`: The initial value is the shilltimes of the issue it belongs to
-     *                      When others `acceptShill` from this NFT, it will subtract one until its value is 0  
-     * - `owner`: record the owner of this NFT
-     * - `transfer_price`: The initial value is zero
-     *                  Set by `determinePrice` or `determinePriceAndApprove` before `transferFrom`
-     *                  It will be checked wether equal to msg.value when `transferFrom` is called
-     *                  After `transferFrom` this value will be set to zero
-     * - `profit`: record the profit owner can claim (include royalty fee it should conduct to its father NFT)
-     * - `metadata`: IPFS hash value of the URI where this NTF's metadata stores
-     */
-
-    function getNFTInfoByNFTID(uint64 _NFT_id) 
-        public view  
-        returns (
-            uint64 issue_information,
-            uint64 father_id,
-            uint128 shill_price,
-            uint16 remain_shill_times,
-            uint128 profit,
-            string memory metadata
-            ) 
-    {
-        require(isEditionExisting(_NFT_id), "SparkLink: Approved query for nonexistent token");
-        return(
-            editions_by_id[getRootNFTIdByNFTId(_NFT_id)].father_id,
-            getFatherByNFTId(_NFT_id),
-            editions_by_id[_NFT_id].shill_price,
-            getRemainShillTimesByNFTId(_NFT_id),
-            getProfitByNFTId(_NFT_id),
-            tokenURI(_NFT_id)
-        );
-    }
-
-    /**
-     * @dev See {IERC721-getApproved}.
-     */
-    function getApproved(uint256 tokenId) public view virtual override returns (address) {
-        require(isEditionExisting(uint256toUint64(tokenId)), "SparkLink: Approved query for nonexistent token");
-
-        return _tokenApprovals[uint256toUint64(tokenId)];
-    }
-
-    /**
-     * @dev See {IERC721-isApprovedForAll}.
-     */
-    function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
-        return _operatorApprovals[owner][operator];
-    }
-
-    /** 
-     * @dev See {IERC721Metadata-tokenURI}.
-     */
-    function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
-        require(isEditionExisting(uint256toUint64(tokenId)), "SparkLink: URI query for nonexistent token");
-        bytes32 _ipfs_hash = editions_by_id[uint256toUint64(tokenId)].ipfs_hash;
-        string memory encoded_hash = _toBase58String(_ipfs_hash);
-        string memory base = _baseURI();
-        return string(abi.encodePacked(base, encoded_hash));
-    }
-
-  /**
-     * @dev Query is issue free for first lever buyer.
-     *
-     * Requirements:
-     * - `_NFT_id`: The id of the edition queryed.
-     * Return a bool value.
-     */
-    function getIsFreeByNFTId(uint64 _NFT_id) public view returns (bool) {
-        require(isEditionExisting(_NFT_id), "SparkLink: Edition is not exist.");
-        return getBoolFromUint64(37, editions_by_id[getRootNFTIdByNFTId(_NFT_id)].father_id);
-    }
-
-    /**
-     * @dev Query is issue follows the NC protocol by any NFT belongs to this issue.
-     *
-     * Requirements:
-     * - `_NFT_id`: The id of the edition queryed.
-     * Return a bool value.
-     */
-    function getIsNCByNFTId(uint64 _NFT_id) public view returns (bool) {
-        require(isEditionExisting(_NFT_id), "SparkLink: Edition is not exist.");
-        return getBoolFromUint64(38, editions_by_id[getRootNFTIdByNFTId(_NFT_id)].father_id);
-    }
-
-    /**
-     * @dev Query is issue follows the ND protocol by any NFT belongs to this issue.
-     *
-     * Requirements:
-     * - `_NFT_id`: The id of the edition queryed.
-     * Return a bool value.
-     */
-    function getIsNDByNFTId(uint64 _NFT_id) public view returns (bool) {
-        require(isEditionExisting(_NFT_id), "SparkLink: Edition is not exist.");
-        return getBoolFromUint64(39, editions_by_id[getRootNFTIdByNFTId(_NFT_id)].father_id);
-    }
-
-    /**
-     * @dev Query is edition exist.
-     *
-     * Requirements:
-     * - `_NFT_id`: The id of the edition queryed.
-     * Return a bool value.
-     */
-    function isEditionExisting(uint64 _NFT_id) public view returns (bool) {
-        return (editions_by_id[_NFT_id].owner != address(0));
-    }
-
-    /**
-     * @dev Query the amount of ETH a NFT can be claimed.
-     *  
-     * Requirements:
-     * - `_NFT_id`: The id of the NFT queryed.
-     * Return the value this NFT can be claimed.
-     * If the NFT is not root NFT, this value will subtract royalty fee percent.
-     */
-    function getProfitByNFTId(uint64 _NFT_id) public view returns (uint128){
-        require(isEditionExisting(_NFT_id), "SparkLink: Edition is not exist.");
-        uint128 amount = editions_by_id[_NFT_id].profit;
-         if (DAO_fee != 0) {
-                uint128 DAO_amount = calculateFee(amount, DAO_fee);
-                amount -= DAO_amount;
-        }
-        if (!isRootNFT(_NFT_id)) {
-            uint128 _total_fee = calculateFee(amount, getRoyaltyFeeByNFTId(_NFT_id));            
-            amount -= _total_fee;
-        }
-        return amount;
-    }
-
-    /**
-     * @dev Query royalty fee percent of an issue by any NFT belongs to this issue.
-     *  
-     * Requirements:
-     * - `_NFT_id`: The id of the NFT queryed.
-     * Return royalty fee percent of this issue.
-     */
-    function getRoyaltyFeeByNFTId(uint64 _NFT_id) public view returns (uint8) {
-        require(isEditionExisting(_NFT_id), "SparkLink: Edition is not exist.");
-        return getUint8FromUint64(56, editions_by_id[getRootNFTIdByNFTId(_NFT_id)].father_id);
-    }
-
-    /**
-     * @dev Query max shill times of an issue by any NFT belongs to this issue.
-     *  
-     * Requirements:
-     * - `_NFT_id`: The id of the NFT queryed.
-     * Return max shill times of this issue.
-     */
-    function getShillTimesByNFTId(uint64 _NFT_id) public view returns (uint16) {
-        require(isEditionExisting(_NFT_id), "SparkLink: Edition is not exist.");
-        return getUint16FromUint64(40, editions_by_id[getRootNFTIdByNFTId(_NFT_id)].father_id);
-    }
-
-    /**
-     * @dev Query total NFT number of a issue by any NFT belongs to this issue.
-     *  
-     * Requirements:
-     * - `_NFT_id`: The id of the NFT queryed.
-     * Return total NFT number of this issue.
-     */
-    function getTotalAmountByNFTId(uint64 _NFT_id) public view returns (uint32) {
-        require(isEditionExisting(_NFT_id), "SparkLink: Edition is not exist.");
-        return getBottomUint32FromUint64(editions_by_id[getRootNFTIdByNFTId(_NFT_id)].father_id);
-    }
-
-    /**
-     * @dev Query supported token address of a issue by any NFT belongs to this issue.
-     *  
-     * Requirements:
-     * - `_NFT_id`: The id of the NFT queryed.
-     * Return supported token address of this NFT.
-     * Address 0 represent ETH.
-     */
-    function getTokenAddrByNFTId(uint64 _NFT_id) public view returns (address) {
-        require(isEditionExisting(_NFT_id), "SparkLink: Edition is not exist.");
-        return token_addresses[uint32(_NFT_id>>32)];
-    }
-
-    /**
-     * @dev Query the id of this NFT's father NFT.
-     *  
-     * Requirements:
-     * - `_NFT_id`: The id of the NFT queryed.
-     * - This NFT should exist and not be root NFT.
-     * Return the father NFT id of this NFT.
-     */
-    function getFatherByNFTId(uint64 _NFT_id) public view returns (uint64) {
-        require(isEditionExisting(_NFT_id), "SparkLink: Edition is not exist.");
-        if (isRootNFT(_NFT_id)) {
-            return 0;
-        }
-        return editions_by_id[_NFT_id].father_id;
-    }    
-    
-    /**
-     * @dev Query transfer_price of this NFT.
-     *  
-     * Requirements:
-     * - `_NFT_id`: The id of the NFT queryed.
-     * Return transfer_price of this NFT.
-     */
-    function getTransferPriceByNFTId(uint64 _NFT_id) public view returns (uint128) {
-        require(isEditionExisting(_NFT_id), "SparkLink: Edition is not exist.");
-        return editions_by_id[_NFT_id].transfer_price;
-    }
-
-    /**
-     * @dev Query shill_price of this NFT.
-     *  
-     * Requirements:
-     * - `_NFT_id`: The id of the NFT queryed.
-     * Return shill_price of this NFT.
-     */
-    function getShillPriceByNFTId(uint64 _NFT_id) public view returns (uint128) {
-        require(isEditionExisting(_NFT_id), "SparkLink: Edition is not exist.");
-        if (getIsFreeByNFTId(_NFT_id)&&isRootNFT(_NFT_id))
-            return 0;
-        else
-            return editions_by_id[_NFT_id].shill_price;
-    }
-
-    /**
-     * @dev Query remaining_shill_times of this NFT.
-     *  
-     * Requirements:
-     * - `_NFT_id`: The id of the NFT queryed.
-     * Return remaining_shill_times of this NFT.
-     */
-    function getRemainShillTimesByNFTId(uint64 _NFT_id) public view returns (uint16) {
-        require(isEditionExisting(_NFT_id), "SparkLink: Edition is not exist.");
-        return editions_by_id[_NFT_id].remaining_shill_times;
-    }
-
-    /**
-     * @dev Query depth of this NFT.
-     *  
-     * Requirements:
-     * - `_NFT_id`: The id of the NFT queryed.
-     * Return depth of this NFT.
-     */
-    function getDepthByNFTId(uint64 _NFT_id) public view returns (uint64) {
-        require(isEditionExisting(_NFT_id), "SparkLink: Edition is not exist.");
-        uint64 depth = 0;
-        for (depth = 0; !isRootNFT(_NFT_id); _NFT_id = getFatherByNFTId(_NFT_id)) {
-            depth += 1;
-        }
-        return depth;
-    }
-
-    /**
-     * @dev Query is this NFT is root NFT by check is its edition id is 1.
-     *  
-     * Requirements:
-     * - `_NFT_id`: The id of the NFT queryed.
-     * Return a bool value to indicate wether this NFT is root NFT.
-     */
-    function isRootNFT(uint64 _NFT_id) public pure returns (bool) {
-        return getBottomUint32FromUint64(_NFT_id) == uint32(1);
-    }
-
-    /**
-     * @dev Query root NFT id by NFT id.
-     *  
-     * Requirements:
-     * - `_NFT_id`: The id of the NFT queryed.
-     * Return a bool value to indicate wether this NFT is root NFT.
-     */
-    function getRootNFTIdByNFTId(uint64 _NFT_id) public pure returns (uint64) {
-        return ((_NFT_id>>32)<<32 | uint64(1));
-    }
-
-    /**
-     * @dev Query loss ratio of this contract.
-     *  
-     * Return loss ratio of this contract.
-     */
-    function getLossRatio() public view returns (uint8) {
-        return loss_ratio;
-    }
-    
-    /**
-     * @dev Calculate edition id by NFT id.
-     *  
-     * Requirements:
-     * - `_NFT_id`: The NFT id of the NFT caller want to get.
-     * Return edition id.
-     */
-    function getEditionIdByNFTId(uint64 _NFT_id) public pure returns (uint32) {
-        return getBottomUint32FromUint64(_NFT_id);
-    }
-    // Token name
-    string private _name;
-
-    // Token symbol
-    string private _symbol;
-    uint8 public loss_ratio = 62;
-    uint8 public DAO_fee = 2;
-    uint8 public constant MAX_DAO_FEE = 2;
-    uint8 public constant MAX_LOSS_RATIO = 50;
-    address public DAO_router01;
-    address public DAO_router02;
-    IUniswapV2Router02 public  uniswapV2Router;
-    IUniswapV2Factory public  uniswapV2Factory;
-    // Mapping owner address to token count
-    mapping(address => uint64) private _balances;
-    // Mapping from token ID to approved address
-    mapping(uint64 => address) private _tokenApprovals;
-    // Mapping from owner to operator approvals
-    mapping(address => mapping(address => bool)) private _operatorApprovals;
-    mapping (uint64 => Edition) private editions_by_id;
-    // mapping from issue ID to support ERC20 token address
-    mapping(uint32 => address) private token_addresses;
-
-    bytes constant private sha256MultiHash = hex"1220"; 
-    bytes constant private ALPHABET = '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz';
-
-    function _swapTokensForEth(address token_addr, uint128 token_amount) private {
-        // generate the uniswap pair path of token -> weth
-        address[] memory path = new address[](2);
-        path[0] = token_addr;
-        path[1] = uniswapV2Router.WETH();
-
-        IERC20(token_addr).approve(address(uniswapV2Router), token_amount);
-
-        // make the swap
-        uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
-            token_amount,
-            0, // accept any amount of ETH
-            path,
-            DAO_router01,
-            block.timestamp
-        );
-    }
-
-
-     /**
-     * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
-     * The call is not executed if the target address is not a contract.
-     *
-     * @param from address representing the previous owner of the given token ID
-     * @param to target address that will receive the tokens
-     * @param tokenId uint256 ID of the token to be transferred
-     * @param _data bytes optional data to send along with the call
-     * @return bool whether the call correctly returned the expected magic value
-     */
-    function _checkOnERC721Received(
-        address from,
-        address to,
-        uint64 tokenId,
-        bytes memory _data
-    ) 
-        private 
-        returns (bool) 
-    {
-        if (to.isContract()) {
-            try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
-                return retval == IERC721Receiver.onERC721Received.selector;
-            } catch (bytes memory reason) {
-                if (reason.length == 0) {
-                    revert("SparkLink: Transfer to non ERC721Receiver implementer");
-                } else {
-                    assembly {
-                        revert(add(32, reason), mload(reason))
-                    }
-                }
-            }
-        } else {
-            return true;
-        }
-    }
-
-    /**
-     * @dev Sets `_tokenURI` as the tokenURI of `tokenId`.
-     *
-     * Requirements:
-     *
-     * - `tokenId` must exist.
-     */
-    function _setTokenURI(uint64 tokenId, bytes32 ipfs_hash) internal virtual {
-        bytes32 old_URI = editions_by_id[tokenId].ipfs_hash;
-        editions_by_id[tokenId].ipfs_hash = ipfs_hash;
-        emit SetURI(tokenId, old_URI, ipfs_hash);
-    }
-    
-     /**
-     * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
-     * The call is not executed if the target address is not a contract.
-     *
-     * @param _NFT_id NFT id of father NFT
-     * @param _owner indicate the address new NFT transfer to
-     * @return a uint64 store new NFT id
-     **/
-    function _mintNFT(
-        uint64 _NFT_id,
-        address _owner
-    ) 
-        internal 
-        returns (uint64) 
-    {
-        _addTotalAmount(_NFT_id);
-        uint32 new_edition_id = getTotalAmountByNFTId(_NFT_id);
-        uint64 new_NFT_id = getNftIdByEditionIdAndIssueId(uint32(_NFT_id>>32), new_edition_id);
-        require(
-            _checkOnERC721Received(address(0), _owner, new_NFT_id, ""),
-            "SparkLink: Transfer to non ERC721Receiver implementer"
-        );
-        Edition storage new_NFT = editions_by_id[new_NFT_id];
-        new_NFT.remaining_shill_times = getShillTimesByNFTId(_NFT_id);
-        new_NFT.father_id = _NFT_id;
-        if (getIsFreeByNFTId(_NFT_id)&&isRootNFT(_NFT_id))
-            new_NFT.shill_price = editions_by_id[_NFT_id].shill_price;
-        else
-            new_NFT.shill_price = calculateFee(editions_by_id[_NFT_id].shill_price, loss_ratio);
-        if (new_NFT.shill_price == 0) {
-            new_NFT.shill_price = editions_by_id[_NFT_id].shill_price;
-        }
-        new_NFT.owner = _owner;
-        new_NFT.ipfs_hash = editions_by_id[_NFT_id].ipfs_hash;
-        _balances[_owner] += 1;
-        emit Transfer(address(0), _owner, new_NFT_id);
-        return new_NFT_id;
-    }
-
-    /**
-     * @dev Internal function to clear approve and transfer_price
-     *
-     * @param _NFT_id NFT id of father NFT
-     **/
-    function _afterTokenTransfer (uint64 _NFT_id) internal {
-        // Clear approvals from the previous owner
-        _approve(address(0), _NFT_id);
-        editions_by_id[_NFT_id].transfer_price = 0;
-    }
-
-    /**
-     * @dev Internal function to support transfer `tokenId` from `from` to `to`.
-     *
-     * @param from address representing the previous owner of the given token ID
-     * @param to target address that will receive the tokens
-     * @param tokenId uint256 ID of the token to be transferred
-     * Emits a {Transfer} event.
-     */
-    function _transfer(
-        address from,
-        address to,
-        uint64 tokenId
-    ) 
-        internal 
-        virtual 
-    {
-        require(ownerOf(tokenId) == from, "SparkLink: Transfer of token that is not own");
-        require(_isApprovedOrOwner(_msgSender(), tokenId), "SparkLink: Transfer caller is not owner nor approved");
-        require(to != address(0), "SparkLink: Transfer to the zero address");
-        if (msg.sender != ownerOf(tokenId)) {
-            address token_addr = getTokenAddrByNFTId(tokenId);
-            uint128 transfer_price = editions_by_id[tokenId].transfer_price;
-            if (token_addr == address(0)){
-                require(msg.value == transfer_price, "SparkLink: Price not met");
-                _addProfit(tokenId, transfer_price);
-            }
-            else {
-                uint256 before_balance = IERC20(token_addr).balanceOf(address(this));
-                IERC20(token_addr).safeTransferFrom(msg.sender, address(this), transfer_price);
-                _addProfit(tokenId, uint256toUint128(IERC20(token_addr).balanceOf(address(this))-before_balance));
-            }
-            claimProfit(tokenId);
-        }
-        else {
-            claimProfit(tokenId);
-        }
-        _afterTokenTransfer(tokenId);
-        _balances[from] -= 1;
-        _balances[to] += 1;
-        editions_by_id[tokenId].owner = to;
-        emit Transfer(from, to, tokenId);
-    }
-
-     /**
-     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
-     * are aware of the ERC721 protocol to prevent tokens from being forever locked.
-     *
-     * `_data` is additional data, it has no specified format and it is sent in call to `to`.
-     *
-     * This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
-     * implement alternative mechanisms to perform token transfer, such as signature-based.
-     *
-     * Requirements:
-     *
-     * - `from` cannot be the zero address.
-     * - `to` cannot be the zero address.
-     * - `tokenId` token must exist and be owned by `from`.
-     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
-     *
-     * Emits a {Transfer} event.
-     */
-    function _safeTransfer(
-        address from,
-        address to,
-        uint64 tokenId,
-        bytes memory _data
-    ) 
-        internal 
-        virtual 
-    {
-        _transfer(from, to, tokenId);
-        require(_checkOnERC721Received(from, to, tokenId, _data), "SparkLink: Transfer to non ERC721Receiver implementer");
-    }
-
-    /**
-     * @dev Approve `to` to operate on `tokenId`
-     *
-     * Emits a {Approval} event.
-     */
-    function _approve(address to, uint64 tokenId) internal virtual {
-        _tokenApprovals[tokenId] = to;
-        emit Approval(ownerOf(tokenId), to, tokenId);
-    }
-
-    function _addProfit(uint64 _NFT_id, uint128 _increase) internal {
-        editions_by_id[_NFT_id].profit = editions_by_id[_NFT_id].profit+_increase;
-    }
-
-    function _addTotalAmount(uint64 _NFT_Id) internal {
-        require(getTotalAmountByNFTId(_NFT_Id) < type(uint32).max, "SparkLink: There is no left in this issue.");
-        editions_by_id[getRootNFTIdByNFTId(_NFT_Id)].father_id += 1;
-    }
-
-    function _isApprovedOrOwner(address spender, uint64 tokenId) internal view virtual returns (bool) {
-        require(isEditionExisting(tokenId), "SparkLink: Operator query for nonexistent token");
-        address owner = ownerOf(tokenId);
-        return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
-    }
-        
-    function _baseURI() internal pure returns (string memory) {
-        return "https://ipfs.io/ipfs/";
-    } 
-
-
-    /**
-     * @dev Calculate NFT id by issue id and edition id.
-     *  
-     * Requirements:
-     * - `_issue_id`: The issue id of the NFT caller want to get.
-     * - `_edition_id`: The edition id of the NFT caller want to get.
-     * Return NFT id.
-     */
-    function getNftIdByEditionIdAndIssueId(uint32 _issue_id, uint32 _edition_id) internal pure returns (uint64) {
-        return (uint64(_issue_id)<<32)|uint64(_edition_id);
-    }
-
-    function getBoolFromUint64(uint8 position, uint64 data64) internal pure returns (bool flag) {
-        // (((1 << size) - 1) & base >> position)
-        assembly {
-            flag := and(1, shr(position, data64))
-        }
-    }
-
-    function getUint8FromUint64(uint8 position, uint64 data64) internal pure returns (uint8 data8) {
-        // (((1 << size) - 1) & base >> position)
-        assembly {
-            data8 := and(sub(shl(8, 1), 1), shr(position, data64))
-        }
-    }
-    function getUint16FromUint64(uint8 position, uint64 data64) internal pure returns (uint16 data16) {
-        // (((1 << size) - 1) & base >> position)
-        assembly {
-            data16 := and(sub(shl(16, 1), 1), shr(position, data64))
-        }
-    }
-    function getBottomUint32FromUint64(uint64 data64) internal pure returns (uint32 data32) {
-        // (((1 << size) - 1) & base >> position)
-        assembly {
-            data32 := and(sub(shl(32, 1), 1), data64)
-        }
-    }
-
-    function reWriteBoolInUint64(uint8 position, bool flag, uint64 data64) internal pure returns (uint64 boxed) {
-        assembly {
-            // mask = ~((1 << 8 - 1) << position)
-            // _box = (mask & _box) | ()data << position)
-            boxed := or( and(data64, not(shl(position, 1))), shl(position, flag))
-        }
-    }
-
-    
-    function reWriteUint8InUint64(uint8 position, uint8 flag, uint64 data64) internal pure returns (uint64 boxed) {
-        assembly {
-            // mask = ~((1 << 8 - 1) << position)
-            // _box = (mask & _box) | ()data << position)
-            boxed := or(and(data64, not(shl(position, 1))), shl(position, flag))
-        }
-    }
-
-    function reWriteUint16InUint64(uint8 position, uint16 data16, uint64 data64) internal pure returns (uint64 boxed) {
-        assembly {
-            // mask = ~((1 << 16 - 1) << position)
-            // _box = (mask & _box) | ()data << position)
-            boxed := or( and(data64, not(shl(position, sub(shl(16, 1), 1)))), shl(position, data16))
-        }
-    }
-
-    function uint256toUint64(uint256 value) internal pure returns (uint64) {
-        require(value <= type(uint64).max, "SparkLink: Value doesn't fit in 64 bits");
-        return uint64(value);
-    }
-
-    function uint256toUint128(uint256 value) internal pure returns (uint128) {
-        require(value <= type(uint128).max, "SparkLink: Value doesn't fit in 128 bits");
-        return uint128(value);
-    }
-    
-    function calculateFee(uint128 _amount, uint8 _fee_percent) internal pure returns (uint128) {
-        return _amount*_fee_percent/10**2;
-    }
-
-    function _toBase58String(bytes32 con) internal pure returns (string memory) {
-        
-        bytes memory source = bytes.concat(sha256MultiHash,con);
-
-        uint8[] memory digits = new uint8[](64); //TODO: figure out exactly how much is needed
-        digits[0] = 0;
-        uint8 digitlength = 1;
-        for (uint256 i = 0; i<source.length; ++i) {
-        uint carry = uint8(source[i]);
-        for (uint256 j = 0; j<digitlength; ++j) {
-            carry += uint(digits[j]) * 256;
-            digits[j] = uint8(carry % 58);
-            carry = carry / 58;
-        }
-        
-        while (carry > 0) {
-            digits[digitlength] = uint8(carry % 58);
-            digitlength++;
-            carry = carry / 58;
-        }
-        }
-        //return digits;
-        return string(toAlphabet(reverse(truncate(digits, digitlength))));
-    }
-
-    function toAlphabet(uint8[] memory indices) internal pure returns (bytes memory) {
-        bytes memory output = new bytes(indices.length);
-        for (uint256 i = 0; i<indices.length; i++) {
-            output[i] = ALPHABET[indices[i]];
-        }
-        return output;
-    }
-    
-    function truncate(uint8[] memory array, uint8 length) internal pure returns (uint8[] memory) {
-        uint8[] memory output = new uint8[](length);
-        for (uint256 i = 0; i<length; i++) {
-            output[i] = array[i];
-        }
-        return output;
-    }
-  
-    function reverse(uint8[] memory input) internal pure returns (uint8[] memory) {
-        uint8[] memory output = new uint8[](input.length);
-        for (uint256 i = 0; i<input.length; i++) {
-            output[i] = input[input.length-1-i];
-        }
-        return output;
-    }
-}
diff --git a/contract/contracts/burn_token.sol b/contract/contracts/burn_token.sol
deleted file mode 100644
index f62856d..0000000
--- a/contract/contracts/burn_token.sol
+++ /dev/null
@@ -1,483 +0,0 @@
-// Sources flattened with hardhat v2.5.0 https://hardhat.org
-
-// File openzeppelin-solidity/contracts/token/ERC20/IERC20.sol@v4.2.0
-
-// SPDX-License-Identifier: MIT
-
-pragma solidity ^0.8.0;
-
-/**
- * @dev Interface of the ERC20 standard as defined in the EIP.
- */
-interface IERC20 {
-    /**
-     * @dev Returns the amount of tokens in existence.
-     */
-    function totalSupply() external view returns (uint256);
-
-    /**
-     * @dev Returns the amount of tokens owned by `account`.
-     */
-    function balanceOf(address account) external view returns (uint256);
-
-    /**
-     * @dev Moves `amount` tokens from the caller's account to `recipient`.
-     *
-     * Returns a boolean value indicating whether the operation succeeded.
-     *
-     * Emits a {Transfer} event.
-     */
-    function transfer(address recipient, uint256 amount) external returns (bool);
-
-    /**
-     * @dev Returns the remaining number of tokens that `spender` will be
-     * allowed to spend on behalf of `owner` through {transferFrom}. This is
-     * zero by default.
-     *
-     * This value changes when {approve} or {transferFrom} are called.
-     */
-    function allowance(address owner, address spender) external view returns (uint256);
-
-    /**
-     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
-     *
-     * Returns a boolean value indicating whether the operation succeeded.
-     *
-     * IMPORTANT: Beware that changing an allowance with this method brings the risk
-     * that someone may use both the old and the new allowance by unfortunate
-     * transaction ordering. One possible solution to mitigate this race
-     * condition is to first reduce the spender's allowance to 0 and set the
-     * desired value afterwards:
-     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
-     *
-     * Emits an {Approval} event.
-     */
-    function approve(address spender, uint256 amount) external returns (bool);
-
-    /**
-     * @dev Moves `amount` tokens from `sender` to `recipient` using the
-     * allowance mechanism. `amount` is then deducted from the caller's
-     * allowance.
-     *
-     * Returns a boolean value indicating whether the operation succeeded.
-     *
-     * Emits a {Transfer} event.
-     */
-    function transferFrom(
-        address sender,
-        address recipient,
-        uint256 amount
-    ) external returns (bool);
-
-    /**
-     * @dev Emitted when `value` tokens are moved from one account (`from`) to
-     * another (`to`).
-     *
-     * Note that `value` may be zero.
-     */
-    event Transfer(address indexed from, address indexed to, uint256 value);
-
-    /**
-     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
-     * a call to {approve}. `value` is the new allowance.
-     */
-    event Approval(address indexed owner, address indexed spender, uint256 value);
-}
-
-/**
- * @dev Interface for the optional metadata functions from the ERC20 standard.
- *
- * _Available since v4.1._
- */
-interface IERC20Metadata is IERC20 {
-    /**
-     * @dev Returns the name of the token.
-     */
-    function name() external view returns (string memory);
-
-    /**
-     * @dev Returns the symbol of the token.
-     */
-    function symbol() external view returns (string memory);
-
-    /**
-     * @dev Returns the decimals places of the token.
-     */
-    function decimals() external view returns (uint8);
-}
-
-/*
- * @dev Provides information about the current execution context, including the
- * sender of the transaction and its data. While these are generally available
- * via msg.sender and msg.data, they should not be accessed in such a direct
- * manner, since when dealing with meta-transactions the account sending and
- * paying for execution may not be the actual sender (as far as an application
- * is concerned).
- *
- * This contract is only required for intermediate, library-like contracts.
- */
-abstract contract Context {
-    function _msgSender() internal view virtual returns (address) {
-        return msg.sender;
-    }
-
-    function _msgData() internal view virtual returns (bytes calldata) {
-        return msg.data;
-    }
-}
-
-/**
- * @dev Implementation of the {IERC20} interface.
- *
- * This implementation is agnostic to the way tokens are created. This means
- * that a supply mechanism has to be added in a derived contract using {_mint}.
- * For a generic mechanism see {ERC20PresetMinterPauser}.
- *
- * TIP: For a detailed writeup see our guide
- * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
- * to implement supply mechanisms].
- *
- * We have followed general OpenZeppelin guidelines: functions revert instead
- * of returning `false` on failure. This behavior is nonetheless conventional
- * and does not conflict with the expectations of ERC20 applications.
- *
- * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
- * This allows applications to reconstruct the allowance for all accounts just
- * by listening to said events. Other implementations of the EIP may not emit
- * these events, as it isn't required by the specification.
- *
- * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
- * functions have been added to mitigate the well-known issues around setting
- * allowances. See {IERC20-approve}.
- */
-contract ERC20 is Context, IERC20, IERC20Metadata {
-    mapping(address => uint256) private _balances;
-
-    mapping(address => mapping(address => uint256)) private _allowances;
-
-    uint256 private _totalSupply;
-
-    string private _name;
-    string private _symbol;
-
-    /**
-     * @dev Sets the values for {name} and {symbol}.
-     *
-     * The default value of {decimals} is 18. To select a different value for
-     * {decimals} you should overload it.
-     *
-     * All two of these values are immutable: they can only be set once during
-     * construction.
-     */
-    constructor(string memory name_, string memory symbol_) {
-        _name = name_;
-        _symbol = symbol_;
-    }
-
-    /**
-     * @dev Returns the name of the token.
-     */
-    function name() public view virtual override returns (string memory) {
-        return _name;
-    }
-
-    /**
-     * @dev Returns the symbol of the token, usually a shorter version of the
-     * name.
-     */
-    function symbol() public view virtual override returns (string memory) {
-        return _symbol;
-    }
-
-    /**
-     * @dev Returns the number of decimals used to get its user representation.
-     * For example, if `decimals` equals `2`, a balance of `505` tokens should
-     * be displayed to a user as `5,05` (`505 / 10 ** 2`).
-     *
-     * Tokens usually opt for a value of 18, imitating the relationship between
-     * Ether and Wei. This is the value {ERC20} uses, unless this function is
-     * overridden;
-     *
-     * NOTE: This information is only used for _display_ purposes: it in
-     * no way affects any of the arithmetic of the contract, including
-     * {IERC20-balanceOf} and {IERC20-transfer}.
-     */
-    function decimals() public view virtual override returns (uint8) {
-        return 18;
-    }
-
-    /**
-     * @dev See {IERC20-totalSupply}.
-     */
-    function totalSupply() public view virtual override returns (uint256) {
-        return _totalSupply;
-    }
-
-    /**
-     * @dev See {IERC20-balanceOf}.
-     */
-    function balanceOf(address account) public view virtual override returns (uint256) {
-        return _balances[account];
-    }
-
-    /**
-     * @dev See {IERC20-transfer}.
-     *
-     * Requirements:
-     *
-     * - `recipient` cannot be the zero address.
-     * - the caller must have a balance of at least `amount`.
-     */
-    function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
-        _transfer(_msgSender(), recipient, amount);
-        return true;
-    }
-
-    /**
-     * @dev See {IERC20-allowance}.
-     */
-    function allowance(address owner, address spender) public view virtual override returns (uint256) {
-        return _allowances[owner][spender];
-    }
-
-    /**
-     * @dev See {IERC20-approve}.
-     *
-     * Requirements:
-     *
-     * - `spender` cannot be the zero address.
-     */
-    function approve(address spender, uint256 amount) public virtual override returns (bool) {
-        _approve(_msgSender(), spender, amount);
-        return true;
-    }
-
-    /**
-     * @dev See {IERC20-transferFrom}.
-     *
-     * Emits an {Approval} event indicating the updated allowance. This is not
-     * required by the EIP. See the note at the beginning of {ERC20}.
-     *
-     * Requirements:
-     *
-     * - `sender` and `recipient` cannot be the zero address.
-     * - `sender` must have a balance of at least `amount`.
-     * - the caller must have allowance for ``sender``'s tokens of at least
-     * `amount`.
-     */
-    function transferFrom(
-        address sender,
-        address recipient,
-        uint256 amount
-    ) public virtual override returns (bool) {
-        _transfer(sender, recipient, amount);
-
-        uint256 currentAllowance = _allowances[sender][_msgSender()];
-        require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
-        unchecked {
-            _approve(sender, _msgSender(), currentAllowance - amount);
-        }
-
-        return true;
-    }
-
-    /**
-     * @dev Atomically increases the allowance granted to `spender` by the caller.
-     *
-     * This is an alternative to {approve} that can be used as a mitigation for
-     * problems described in {IERC20-approve}.
-     *
-     * Emits an {Approval} event indicating the updated allowance.
-     *
-     * Requirements:
-     *
-     * - `spender` cannot be the zero address.
-     */
-    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
-        _approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
-        return true;
-    }
-
-    /**
-     * @dev Atomically decreases the allowance granted to `spender` by the caller.
-     *
-     * This is an alternative to {approve} that can be used as a mitigation for
-     * problems described in {IERC20-approve}.
-     *
-     * Emits an {Approval} event indicating the updated allowance.
-     *
-     * Requirements:
-     *
-     * - `spender` cannot be the zero address.
-     * - `spender` must have allowance for the caller of at least
-     * `subtractedValue`.
-     */
-    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
-        uint256 currentAllowance = _allowances[_msgSender()][spender];
-        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
-        unchecked {
-            _approve(_msgSender(), spender, currentAllowance - subtractedValue);
-        }
-
-        return true;
-    }
-
-    /**
-     * @dev Moves `amount` of tokens from `sender` to `recipient`.
-     *
-     * This internal function is equivalent to {transfer}, and can be used to
-     * e.g. implement automatic token fees, slashing mechanisms, etc.
-     *
-     * Emits a {Transfer} event.
-     *
-     * Requirements:
-     *
-     * - `sender` cannot be the zero address.
-     * - `recipient` cannot be the zero address.
-     * - `sender` must have a balance of at least `amount`.
-     */
-    function _transfer(
-        address sender,
-        address recipient,
-        uint256 amount
-    ) internal virtual {
-        require(sender != address(0), "ERC20: transfer from the zero address");
-        require(recipient != address(0), "ERC20: transfer to the zero address");
-
-        _beforeTokenTransfer(sender, recipient, amount);
-
-        uint256 senderBalance = _balances[sender];
-        require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
-
-        unchecked {
-            _balances[sender] = senderBalance - amount;
-        }
-        // burn half of the `transfered` tokens
-        uint256 received_amount = amount/2;
-        _balances[recipient] += received_amount;
-
-        emit Transfer(sender, recipient, received_amount);
-
-        _afterTokenTransfer(sender, recipient, amount);
-    }
-
-    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
-     * the total supply.
-     *
-     * Emits a {Transfer} event with `from` set to the zero address.
-     *
-     * Requirements:
-     *
-     * - `account` cannot be the zero address.
-     */
-    function _mint(address account, uint256 amount) internal virtual {
-        require(account != address(0), "ERC20: mint to the zero address");
-
-        _beforeTokenTransfer(address(0), account, amount);
-
-        _totalSupply += amount;
-        _balances[account] += amount;
-        emit Transfer(address(0), account, amount);
-
-        _afterTokenTransfer(address(0), account, amount);
-    }
-
-    /**
-     * @dev Destroys `amount` tokens from `account`, reducing the
-     * total supply.
-     *
-     * Emits a {Transfer} event with `to` set to the zero address.
-     *
-     * Requirements:
-     *
-     * - `account` cannot be the zero address.
-     * - `account` must have at least `amount` tokens.
-     */
-    function _burn(address account, uint256 amount) internal virtual {
-        require(account != address(0), "ERC20: burn from the zero address");
-
-        _beforeTokenTransfer(account, address(0), amount);
-
-        uint256 accountBalance = _balances[account];
-        require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
-        unchecked {
-            _balances[account] = accountBalance - amount;
-        }
-        _totalSupply -= amount;
-
-        emit Transfer(account, address(0), amount);
-
-        _afterTokenTransfer(account, address(0), amount);
-    }
-
-    /**
-     * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
-     *
-     * This internal function is equivalent to `approve`, and can be used to
-     * e.g. set automatic allowances for certain subsystems, etc.
-     *
-     * Emits an {Approval} event.
-     *
-     * Requirements:
-     *
-     * - `owner` cannot be the zero address.
-     * - `spender` cannot be the zero address.
-     */
-    function _approve(
-        address owner,
-        address spender,
-        uint256 amount
-    ) internal virtual {
-        require(owner != address(0), "ERC20: approve from the zero address");
-        require(spender != address(0), "ERC20: approve to the zero address");
-
-        _allowances[owner][spender] = amount;
-        emit Approval(owner, spender, amount);
-    }
-
-    /**
-     * @dev Hook that is called before any transfer of tokens. This includes
-     * minting and burning.
-     *
-     * Calling conditions:
-     *
-     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
-     * will be transferred to `to`.
-     * - when `from` is zero, `amount` tokens will be minted for `to`.
-     * - when `to` is zero, `amount` of ``from``'s tokens will be burned.
-     * - `from` and `to` are never both zero.
-     *
-     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
-     */
-    function _beforeTokenTransfer(
-        address from,
-        address to,
-        uint256 amount
-    ) internal virtual {}
-
-    /**
-     * @dev Hook that is called after any transfer of tokens. This includes
-     * minting and burning.
-     *
-     * Calling conditions:
-     *
-     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
-     * has been transferred to `to`.
-     * - when `from` is zero, `amount` tokens have been minted for `to`.
-     * - when `to` is zero, `amount` of ``from``'s tokens have been burned.
-     * - `from` and `to` are never both zero.
-     *
-     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
-     */
-    function _afterTokenTransfer(
-        address from,
-        address to,
-        uint256 amount
-    ) internal virtual {}
-}
-
-contract BurnToken is ERC20 {
-    constructor(uint initialSupply) ERC20("TestToken", "TEST") {
-        _mint(msg.sender, initialSupply);
-    }
-}
\ No newline at end of file
diff --git a/contract/contracts/tokenA.sol b/contract/contracts/tokenA.sol
deleted file mode 100644
index 24018e9..0000000
--- a/contract/contracts/tokenA.sol
+++ /dev/null
@@ -1,11 +0,0 @@
-// SPDX-License-Identifier: MIT
-
-pragma solidity >= 0.8.0;
-
-import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
-
-contract TestTokenA is ERC20 {
-    constructor(uint initialSupply) ERC20("TestTokenC", "TESTC") {
-        _mint(msg.sender, initialSupply);
-    }
-}
diff --git a/contract/doc/MathDoc.md b/contract/doc/MathDoc.md
deleted file mode 100644
index f2f39a2..0000000
--- a/contract/doc/MathDoc.md
+++ /dev/null
@@ -1,104 +0,0 @@
-# SparkNFT 收益
-
-## 名词表
-
-- 「刚刚被 `publish()` 出来的那个 NFT」为第 $L_0$ 层。
-- 某用户在 `acceptShill()` 后会获得一个第 $L_n$ 层 NFT。
-  > `Layer`
-- 生成 $L_n$ 层的 NFT 需要调用 `acceptShill()` ，调用此函数时需要携带的 `msg.value` 为 $P_n$
-  > `Price` 。其中 $P_0$ 没有意义， $P_1$ 由 `publish()` 的传入参数决定
-- $D = P_n \div P_{n-1}$
-  > 每层购买价格的衰减比率 (`Decay`)， $0 < D < 1$ ，由合约内置，全合约统一，不可更改
-- 本内容树允许每个 NFT 派生出 $S$ 个下级 NFT
-  > `Shill` ，由 `publish()` 传入参数决定。可以理解为 `S叉树` 。
-- 内容树第$N$层的节点数量同样一$S$控制， $T_n = S^{n}$
-- $L_n$ 的 NFT 获取利润后，需要上交给 $L_{n-1}$ 其所得的 $R$ 倍
-  > `Royalty Fee` , $0 < R < 1$ ，由 `publish()` 传入参数决定。
-  > 一般场景下不会大于 $10\%$ ，过大不利于调动传播者积极性。
-
-## 场景
-
-### 新用户购买第 $L_n$ 层所需付费金额
-
-- $L_1$
-$$
-P_1  
-$$
-
-- $L_2$
-$$
-P_1D
-$$
-
-- $L_n$
-$$
-P_{n-1}D \\
-= P_1D^n
-$$
-
-### 在有新用户购买第 $X$ 层的 NFT 后，第 $Y$ 层会收到的钱
-收到的钱分为两部分
-- 一部分留在了第 $Y$ 层
-- 另一部分传递到上层
-
-- $L_1$ , $L_0$
-  - Keep in $L_0$
-$$
-P_1
-$$
-
-- $L_2$ 
-  - Keep in $L_1$
-$$
-P_2(1-R) \\
-= P_1D(1-R)
-$$
-  - Keep in $L_0$
-$$
-P_2R \\
-= P_1DR
-$$
-- $L_n \qquad {n > 1}$ 
-  - Keep in $L_{n-1}$
-$$
-P_n(1-R) \\
-= P_{n-1}D(1-R) \\
-= P_1D^{n-1}(1-R)
-$$
-  - Keep in $L_{n-2}$
-$$
-P_nR \\
-= P_{n-1}DR \\
-= P_1D^{n-1}R
-$$
-  - Keep in $L_0$
-$$
-P_nR^{n-1} \\
-= P_{n-1}DR^{n-1}  \\
-= P_1D^{n-1}R^{n-1} 
-$$
-
-
-
-### 当$N$层被填满时第$0$层的总收益
-第$N$层的节点数量$T$受到$S$的控制，呈指数增长。
-第$N$层的单价受$D$的控制，指数递减。
-$L_0$从第$N$层的每个NFT获取的利润受$R$的控制，呈指数递减。
-- 第$1$层
-$$
-P_1S
-$$
-- 第$2$层
-$$
-P_2S^2R \\
-= P_1DS^2R
-$$
-
-- 第$N$层
-$$
-P_nS^nR^{n-1} \\
-= P_1D^{n-1}S^nR^{n-1}
-$$
-即从第二层开始，第$N$层带给$L_0$的利润增长或下降幅度收到$D, S ,R$三个量的控制，其中D为常数，目前设定为$0.9$
-当$DSR>1$即$SR>1 \div D$时当$N$层被填满时第$0$层的总收益持增长趋势
-此公式同时适用于对任意一节点。
\ No newline at end of file
diff --git a/contract/doc/SparkLink_API.md b/contract/doc/SparkLink_API.md
deleted file mode 100644
index e104310..0000000
--- a/contract/doc/SparkLink_API.md
+++ /dev/null
@@ -1,41 +0,0 @@
-# SparkNFT Smart Contract API
-
-## Contract ABI interface
-
-List of functions (follow the link to the comment):
-
-- [publish](./../contracts/SparkNFT.sol)
-- [acceptShill]()
-- [claimProfit]()
-- [determinePrice]()
-- [determinePriceAndApprove]()
-
-
-Besides, `SparkNFT Smart Contract` is also a special ERC-721 NFT (attached a tree data structure).
-
-- Therefore, it supports NFT-721 interfaces, like `ownerOf`, `balanceOf`.
-- Since it is special, the behavior of `mint` is very different from common ERC-721 NFT.
-  There are two methods to mint a new NFT.
-  When publisher `publish` an issue (represent an series of NFTs), contract will generate a root NFT and transfer it to him.
-  Then other buyer can using `acceptShill` with a NFT ID mint a NFT which is a child NFT of the NFT ID it used.
-  In the second progress, buyer need pay for this NFT's price to the owner of the NFT ID he inputs.
-  And when some one mint NFT from new this NFT, the owner of its father NFT will get part of amount it sells. 
-- There are some slight differences at the behavior of `token transfer` function.
-  This token is integrated a price mechanism, if token's price is determined by owner, `transfer` function will check if the value of this transaction is equal price. 
-
-## `Edition` data structure
-- 
-## `Issue` data structure(abstract)
-- To reduce gas costs due to storage, we storage 
-
-## Function Briefing
-
-### 1. publish
-
-Publisher can call this function to create an issue (e.g a book) which contains several NFT with same or similar content.
-The publisher need to provide four elements: first sell price, royalty fee percent, shill times and IPFS hash.
-
-**`function publish(uint128 _first_sell_price, uint8 _royalty_fee, uint8 _shill_times, bytes32 _ipfs_hash)`**
-
-- Parameters:
-  - `_first_sell_price`:  
\ No newline at end of file
diff --git a/contract/doc/gas_report.txt b/contract/doc/gas_report.txt
deleted file mode 100644
index c9e3693..0000000
--- a/contract/doc/gas_report.txt
+++ /dev/null
@@ -1,46 +0,0 @@
-·-------------------------------------------|---------------------------|-------------|-----------------------------·
-|            Solc version: 0.8.4            ·  Optimizer enabled: true  ·  Runs: 200  ·  Block limit: 30000000 gas  │
-············································|···························|·············|······························
-|  Methods                                                                                                          │
-···············|····························|·············|·············|·············|···············|··············
-|  Contract    ·  Method                    ·  Min        ·  Max        ·  Avg        ·  # calls      ·  usd (avg)  │
-···············|····························|·············|·············|·············|···············|··············
-|  BurnToken   ·  approve                   ·      46215  ·      46227  ·      46221  ·           18  ·          -  │
-···············|····························|·············|·············|·············|···············|··············
-|  BurnToken   ·  transfer                  ·      51661  ·      51673  ·      51666  ·           18  ·          -  │
-···············|····························|·············|·············|·············|···············|··············
-|  SparkLink   ·  acceptShill               ·     118919  ·     236659  ·     158398  ·          163  ·          -  │
-···············|····························|·············|·············|·············|···············|··············
-|  SparkLink   ·  approve                   ·          -  ·          -  ·      49127  ·            2  ·          -  │
-···············|····························|·············|·············|·············|···············|··············
-|  SparkLink   ·  claimProfit               ·      49156  ·     119863  ·      67844  ·           82  ·          -  │
-···············|····························|·············|·············|·············|···············|··············
-|  SparkLink   ·  determinePrice            ·      28369  ·      48281  ·      36416  ·            6  ·          -  │
-···············|····························|·············|·············|·············|···············|··············
-|  SparkLink   ·  determinePriceAndApprove  ·      41601  ·      75837  ·      72573  ·           43  ·          -  │
-···············|····························|·············|·············|·············|···············|··············
-|  SparkLink   ·  label                     ·          -  ·          -  ·      27960  ·            2  ·          -  │
-···············|····························|·············|·············|·············|···············|··············
-|  SparkLink   ·  publish                   ·     142409  ·     167917  ·     146479  ·           44  ·          -  │
-···············|····························|·············|·············|·············|···············|··············
-|  SparkLink   ·  safeTransferFrom          ·      88130  ·     183203  ·     131705  ·           37  ·          -  │
-···············|····························|·············|·············|·············|···············|··············
-|  SparkLink   ·  setApprovalForAll         ·      24323  ·      46235  ·      38931  ·            3  ·          -  │
-···············|····························|·············|·············|·············|···············|··············
-|  SparkLink   ·  setURI                    ·          -  ·          -  ·      34067  ·            1  ·          -  │
-···············|····························|·············|·············|·············|···············|··············
-|  TestTokenA  ·  approve                   ·      46203  ·      46287  ·      46221  ·           52  ·          -  │
-···············|····························|·············|·············|·············|···············|··············
-|  TestTokenA  ·  transfer                  ·      51537  ·      51561  ·      51550  ·           31  ·          -  │
-···············|····························|·············|·············|·············|···············|··············
-|  TestTokenA  ·  transferFrom              ·      59287  ·      59299  ·      59292  ·           19  ·          -  │
-···············|····························|·············|·············|·············|···············|··············
-|  Deployments                              ·                                         ·  % of limit   ·             │
-············································|·············|·············|·············|···············|··············
-|  BurnToken                                ·          -  ·          -  ·     654071  ·        2.2 %  ·          -  │
-············································|·············|·············|·············|···············|··············
-|  SparkLink                                ·    4437104  ·    4437116  ·    4437113  ·       14.8 %  ·          -  │
-············································|·············|·············|·············|···············|··············
-|  TestTokenA                               ·          -  ·          -  ·     638568  ·        2.1 %  ·          -  │
-·-------------------------------------------|-------------|-------------|-------------|---------------|-------------·
-
diff --git a/contract/doc/tmp.md b/contract/doc/tmp.md
deleted file mode 100644
index 34bdb6d..0000000
--- a/contract/doc/tmp.md
+++ /dev/null
@@ -1,20 +0,0 @@
-目前增加了ERC20的支持。
-新增的变化有：
-publish 多传入一个address类型的_token_addr参数
-shill_times的类型由uint8改为了uint16
-多了两个接口
-getTokenAddrByIssueId
-getTokenAddrByNFTId
-用于查询对应issue内支持的流通代币的地址
-除了今天讨论的前端的填入地址的变化之外。
-在铸造和购买两个页面都需要有approve的操作了目前。
-
-部署地址：
-rinkeby:
-0xca6090D6F006eF6Dbf7E177b0197aD12B36cd476
-matic:
-0xb42d4525841008A69E427026DF354067fD6A524f
-
-这部分的测试考虑了我们前面说过的相对比较常见的打入账户的token的数量与transfer的时候不一样的情况
-在这种情况下是work的，其他的情况我觉得就是publisher自己的锅了
-（俺去帮女友搬家了今天，嘿嘿。
\ No newline at end of file
diff --git a/contract/hardhat.config.ts b/contract/hardhat.config.ts
deleted file mode 100644
index 374c632..0000000
--- a/contract/hardhat.config.ts
+++ /dev/null
@@ -1,55 +0,0 @@
-import { task } from "hardhat/config";
-import '@typechain/hardhat'
-import '@nomiclabs/hardhat-ethers'
-import "@nomiclabs/hardhat-waffle";
-import "hardhat-gas-reporter";
-import 'hardhat-deploy';
-import 'hardhat-deploy-ethers';
-import chain from "./chain";
-
-// This is a sample Hardhat task. To learn how to create your own go to
-// https://hardhat.org/guides/create-task.html
-task("accounts", "Prints the list of accounts", async (_args, hre) => {
-  const accounts = await hre.ethers.getSigners();
-
-  for (const account of accounts) {
-    console.log(account.address);
-  }
-});
-
-// You need to export an object to set up your config
-// Go to https://hardhat.org/config/ to learn more
-
-/**
- * @type import('hardhat/config').HardhatUserConfig
- */
-export default { 
-    ...chain,
-    solidity: {
-        version: "0.8.4",
-        settings: {
-            optimizer: {
-                enabled: true,
-                runs: 200,
-            },
-        },
-    } ,
-    gasReporter: {
-        currency: 'USD',
-        gasPrice: '40',
-    },
-    typechain: {
-        outDir: 'artifacts/typechain',
-        target: 'ethers-v5',
-    },
-    external: {
-        contracts: [
-          {
-            artifacts: 'node_modules/@uniswap/v2-core/build',
-          },
-          {
-            artifacts: 'node_modules/@uniswap/v2-periphery/build',
-          },
-        ],
-      },
-};
diff --git a/contract/package.json b/contract/package.json
deleted file mode 100644
index 8d31a59..0000000
--- a/contract/package.json
+++ /dev/null
@@ -1,30 +0,0 @@
-{
-  "name": "hardhat-project",
-  "devDependencies": {
-    "@nomiclabs/hardhat-ethers": "^2.0.2",
-    "@nomiclabs/hardhat-solhint": "^2.0.0",
-    "@nomiclabs/hardhat-waffle": "^2.0.1",
-    "@typechain/ethers-v5": "^7.0.1",
-    "@typechain/hardhat": "^2.3.0",
-    "@types/chai": "^4.2.21",
-    "@types/mocha": "^9.0.0",
-    "@types/node": "^16.7.2",
-    "chai": "^4.3.4",
-    "ethereum-waffle": "^3.4.0",
-    "ethers": "^5.4.4",
-    "hardhat": "^2.6.0",
-    "hardhat-deploy": "^0.9.4",
-    "hardhat-gas-reporter": "^1.0.4",
-    "ts-node": "^10.2.1",
-    "typechain": "^6.0.2",
-    "typescript": "^4.3.5"
-  },
-  "dependencies": {
-    "@openzeppelin/contracts": "^4.2.0",
-    "@uniswap/v2-core": "^1.0.1",
-    "@uniswap/v2-periphery": "^1.1.0-beta.0",
-    "weth": "^1.0.4",
-    "hardhat-deploy": "^0.9.4",
-    "hardhat-deploy-ethers": "^0.3.0-beta.11"
-  }
-}
diff --git a/contract/publish.sol b/contract/publish.sol
deleted file mode 100644
index 5ce27a5..0000000
--- a/contract/publish.sol
+++ /dev/null
@@ -1,2220 +0,0 @@
-
-// Sources flattened with hardhat v2.6.1 https://hardhat.org
-
-// File contracts/IERC721Receiver.sol
-
-// SPDX-License-Identifier: MIT
-
-pragma solidity ^0.8.0;
-
-/**
- * @title ERC721 token receiver interface
- * @dev Interface for any contract that wants to support safeTransfers
- * from ERC721 asset contracts.
- */
-interface IERC721Receiver {
-    /**
-     * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
-     * by `operator` from `from`, this function is called.
-     *
-     * It must return its Solidity selector to confirm the token transfer.
-     * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
-     *
-     * The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
-     */
-    function onERC721Received(
-        address operator,
-        address from,
-        uint256 tokenId,
-        bytes calldata data
-    ) external returns (bytes4);
-}
-
-
-// File @openzeppelin/contracts/utils/introspection/IERC165.sol@v4.3.0
-
-
-
-pragma solidity ^0.8.0;
-
-/**
- * @dev Interface of the ERC165 standard, as defined in the
- * https://eips.ethereum.org/EIPS/eip-165[EIP].
- *
- * Implementers can declare support of contract interfaces, which can then be
- * queried by others ({ERC165Checker}).
- *
- * For an implementation, see {ERC165}.
- */
-interface IERC165 {
-    /**
-     * @dev Returns true if this contract implements the interface defined by
-     * `interfaceId`. See the corresponding
-     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
-     * to learn more about how these ids are created.
-     *
-     * This function call must use less than 30 000 gas.
-     */
-    function supportsInterface(bytes4 interfaceId) external view returns (bool);
-}
-
-
-// File contracts/IERC721.sol
-
-
-
-pragma solidity >= 0.8.0;
-
-/// @title ERC-721 Non-Fungible Token Standard
-/// @dev See https://eips.ethereum.org/EIPS/eip-721
-///  Note: the ERC-165 identifier for this interface is 0x80ac58cd.
-interface IERC721 is IERC165 {
-     /**
-     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
-     */
-    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
-
-    /**
-     * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
-     */
-    event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
-
-    /**
-     * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
-     */
-    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
-
-    /**
-     * @dev Returns the number of tokens in ``owner``'s account.
-     */
-    function balanceOf(address owner) external view returns (uint256 balance);
-
-    /**
-     * @dev Returns the owner of the `tokenId` token.
-     *
-     * Requirements:
-     *
-     * - `tokenId` must exist.
-     */
-    function ownerOf(uint256 tokenId) external view returns (address owner);
-
-    /**
-     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
-     * are aware of the ERC721 protocol to prevent tokens from being forever locked.
-     *
-     * Requirements:
-     *
-     * - `from` cannot be the zero address.
-     * - `to` cannot be the zero address.
-     * - `tokenId` token must exist and be owned by `from`.
-     * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
-     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
-     *
-     * Emits a {Transfer} event.
-     */
-    function safeTransferFrom(
-        address from,
-        address to,
-        uint256 tokenId
-    ) payable external;
-
-    /**
-     * @dev Transfers `tokenId` token from `from` to `to`.
-     *
-     * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
-     *
-     * Requirements:
-     *
-     * - `from` cannot be the zero address.
-     * - `to` cannot be the zero address.
-     * - `tokenId` token must be owned by `from`.
-     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
-     *
-     * Emits a {Transfer} event.
-     */
-    function transferFrom(
-        address from,
-        address to,
-        uint256 tokenId
-    ) payable external;
-
-    /**
-     * @dev Gives permission to `to` to transfer `tokenId` token to another account.
-     * The approval is cleared when the token is transferred.
-     *
-     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.
-     *
-     * Requirements:
-     *
-     * - The caller must own the token or be an approved operator.
-     * - `tokenId` must exist.
-     *
-     * Emits an {Approval} event.
-     */
-    function approve(address to, uint256 tokenId) external;
-
-    /**
-     * @dev Returns the account approved for `tokenId` token.
-     *
-     * Requirements:
-     *
-     * - `tokenId` must exist.
-     */
-    function getApproved(uint256 tokenId) external view returns (address operator);
-
-    /**
-     * @dev Approve or remove `operator` as an operator for the caller.
-     * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
-     *
-     * Requirements:
-     *
-     * - The `operator` cannot be the caller.
-     *
-     * Emits an {ApprovalForAll} event.
-     */
-    function setApprovalForAll(address operator, bool _approved) external;
-
-    /**
-     * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
-     *
-     * See {setApprovalForAll}
-     */
-    function isApprovedForAll(address owner, address operator) external view returns (bool);
-
-    /**
-     * @dev Safely transfers `tokenId` token from `from` to `to`.
-     *
-     * Requirements:
-     *
-     * - `from` cannot be the zero address.
-     * - `to` cannot be the zero address.
-     * - `tokenId` token must exist and be owned by `from`.
-     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
-     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
-     *
-     * Emits a {Transfer} event.
-     */
-    function safeTransferFrom(
-        address from,
-        address to,
-        uint256 tokenId,
-        bytes calldata data
-    ) payable external;
-}
-
-
-// File contracts/IERC721Metadata.sol
-
-
-
-pragma solidity ^0.8.0;
-
-/**
- * @title ERC-721 Non-Fungible Token Standard, optional metadata extension
- * @dev See https://eips.ethereum.org/EIPS/eip-721
- */
-interface IERC721Metadata is IERC721 {
-    /**
-     * @dev Returns the token collection name.
-     */
-    function name() external view returns (string memory);
-
-    /**
-     * @dev Returns the token collection symbol.
-     */
-    function symbol() external view returns (string memory);
-
-    /**
-     * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
-     */
-    function tokenURI(uint256 tokenId) external view returns (string memory);
-}
-
-
-// File @openzeppelin/contracts/utils/Counters.sol@v4.3.0
-
-
-
-pragma solidity ^0.8.0;
-
-/**
- * @title Counters
- * @author Matt Condon (@shrugs)
- * @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number
- * of elements in a mapping, issuing ERC721 ids, or counting request ids.
- *
- * Include with `using Counters for Counters.Counter;`
- */
-library Counters {
-    struct Counter {
-        // This variable should never be directly accessed by users of the library: interactions must be restricted to
-        // the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
-        // this feature: see https://github.com/ethereum/solidity/issues/4637
-        uint256 _value; // default: 0
-    }
-
-    function current(Counter storage counter) internal view returns (uint256) {
-        return counter._value;
-    }
-
-    function increment(Counter storage counter) internal {
-        unchecked {
-            counter._value += 1;
-        }
-    }
-
-    function decrement(Counter storage counter) internal {
-        uint256 value = counter._value;
-        require(value > 0, "Counter: decrement overflow");
-        unchecked {
-            counter._value = value - 1;
-        }
-    }
-
-    function reset(Counter storage counter) internal {
-        counter._value = 0;
-    }
-}
-
-
-// File @openzeppelin/contracts/utils/Address.sol@v4.3.0
-
-
-
-pragma solidity ^0.8.0;
-
-/**
- * @dev Collection of functions related to the address type
- */
-library Address {
-    /**
-     * @dev Returns true if `account` is a contract.
-     *
-     * [IMPORTANT]
-     * ====
-     * It is unsafe to assume that an address for which this function returns
-     * false is an externally-owned account (EOA) and not a contract.
-     *
-     * Among others, `isContract` will return false for the following
-     * types of addresses:
-     *
-     *  - an externally-owned account
-     *  - a contract in construction
-     *  - an address where a contract will be created
-     *  - an address where a contract lived, but was destroyed
-     * ====
-     */
-    function isContract(address account) internal view returns (bool) {
-        // This method relies on extcodesize, which returns 0 for contracts in
-        // construction, since the code is only stored at the end of the
-        // constructor execution.
-
-        uint256 size;
-        assembly {
-            size := extcodesize(account)
-        }
-        return size > 0;
-    }
-
-    /**
-     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
-     * `recipient`, forwarding all available gas and reverting on errors.
-     *
-     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
-     * of certain opcodes, possibly making contracts go over the 2300 gas limit
-     * imposed by `transfer`, making them unable to receive funds via
-     * `transfer`. {sendValue} removes this limitation.
-     *
-     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
-     *
-     * IMPORTANT: because control is transferred to `recipient`, care must be
-     * taken to not create reentrancy vulnerabilities. Consider using
-     * {ReentrancyGuard} or the
-     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
-     */
-    function sendValue(address payable recipient, uint256 amount) internal {
-        require(address(this).balance >= amount, "Address: insufficient balance");
-
-        (bool success, ) = recipient.call{value: amount}("");
-        require(success, "Address: unable to send value, recipient may have reverted");
-    }
-
-    /**
-     * @dev Performs a Solidity function call using a low level `call`. A
-     * plain `call` is an unsafe replacement for a function call: use this
-     * function instead.
-     *
-     * If `target` reverts with a revert reason, it is bubbled up by this
-     * function (like regular Solidity function calls).
-     *
-     * Returns the raw returned data. To convert to the expected return value,
-     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
-     *
-     * Requirements:
-     *
-     * - `target` must be a contract.
-     * - calling `target` with `data` must not revert.
-     *
-     * _Available since v3.1._
-     */
-    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
-        return functionCall(target, data, "Address: low-level call failed");
-    }
-
-    /**
-     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
-     * `errorMessage` as a fallback revert reason when `target` reverts.
-     *
-     * _Available since v3.1._
-     */
-    function functionCall(
-        address target,
-        bytes memory data,
-        string memory errorMessage
-    ) internal returns (bytes memory) {
-        return functionCallWithValue(target, data, 0, errorMessage);
-    }
-
-    /**
-     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
-     * but also transferring `value` wei to `target`.
-     *
-     * Requirements:
-     *
-     * - the calling contract must have an ETH balance of at least `value`.
-     * - the called Solidity function must be `payable`.
-     *
-     * _Available since v3.1._
-     */
-    function functionCallWithValue(
-        address target,
-        bytes memory data,
-        uint256 value
-    ) internal returns (bytes memory) {
-        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
-    }
-
-    /**
-     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
-     * with `errorMessage` as a fallback revert reason when `target` reverts.
-     *
-     * _Available since v3.1._
-     */
-    function functionCallWithValue(
-        address target,
-        bytes memory data,
-        uint256 value,
-        string memory errorMessage
-    ) internal returns (bytes memory) {
-        require(address(this).balance >= value, "Address: insufficient balance for call");
-        require(isContract(target), "Address: call to non-contract");
-
-        (bool success, bytes memory returndata) = target.call{value: value}(data);
-        return verifyCallResult(success, returndata, errorMessage);
-    }
-
-    /**
-     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
-     * but performing a static call.
-     *
-     * _Available since v3.3._
-     */
-    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
-        return functionStaticCall(target, data, "Address: low-level static call failed");
-    }
-
-    /**
-     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
-     * but performing a static call.
-     *
-     * _Available since v3.3._
-     */
-    function functionStaticCall(
-        address target,
-        bytes memory data,
-        string memory errorMessage
-    ) internal view returns (bytes memory) {
-        require(isContract(target), "Address: static call to non-contract");
-
-        (bool success, bytes memory returndata) = target.staticcall(data);
-        return verifyCallResult(success, returndata, errorMessage);
-    }
-
-    /**
-     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
-     * but performing a delegate call.
-     *
-     * _Available since v3.4._
-     */
-    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
-        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
-    }
-
-    /**
-     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
-     * but performing a delegate call.
-     *
-     * _Available since v3.4._
-     */
-    function functionDelegateCall(
-        address target,
-        bytes memory data,
-        string memory errorMessage
-    ) internal returns (bytes memory) {
-        require(isContract(target), "Address: delegate call to non-contract");
-
-        (bool success, bytes memory returndata) = target.delegatecall(data);
-        return verifyCallResult(success, returndata, errorMessage);
-    }
-
-    /**
-     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
-     * revert reason using the provided one.
-     *
-     * _Available since v4.3._
-     */
-    function verifyCallResult(
-        bool success,
-        bytes memory returndata,
-        string memory errorMessage
-    ) internal pure returns (bytes memory) {
-        if (success) {
-            return returndata;
-        } else {
-            // Look for revert reason and bubble it up if present
-            if (returndata.length > 0) {
-                // The easiest way to bubble the revert reason is using memory via assembly
-
-                assembly {
-                    let returndata_size := mload(returndata)
-                    revert(add(32, returndata), returndata_size)
-                }
-            } else {
-                revert(errorMessage);
-            }
-        }
-    }
-}
-
-
-// File @openzeppelin/contracts/utils/Context.sol@v4.3.0
-
-
-
-pragma solidity ^0.8.0;
-
-/**
- * @dev Provides information about the current execution context, including the
- * sender of the transaction and its data. While these are generally available
- * via msg.sender and msg.data, they should not be accessed in such a direct
- * manner, since when dealing with meta-transactions the account sending and
- * paying for execution may not be the actual sender (as far as an application
- * is concerned).
- *
- * This contract is only required for intermediate, library-like contracts.
- */
-abstract contract Context {
-    function _msgSender() internal view virtual returns (address) {
-        return msg.sender;
-    }
-
-    function _msgData() internal view virtual returns (bytes calldata) {
-        return msg.data;
-    }
-}
-
-
-// File @openzeppelin/contracts/utils/Strings.sol@v4.3.0
-
-
-
-pragma solidity ^0.8.0;
-
-/**
- * @dev String operations.
- */
-library Strings {
-    bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
-
-    /**
-     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
-     */
-    function toString(uint256 value) internal pure returns (string memory) {
-        // Inspired by OraclizeAPI's implementation - MIT licence
-        // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
-
-        if (value == 0) {
-            return "0";
-        }
-        uint256 temp = value;
-        uint256 digits;
-        while (temp != 0) {
-            digits++;
-            temp /= 10;
-        }
-        bytes memory buffer = new bytes(digits);
-        while (value != 0) {
-            digits -= 1;
-            buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
-            value /= 10;
-        }
-        return string(buffer);
-    }
-
-    /**
-     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
-     */
-    function toHexString(uint256 value) internal pure returns (string memory) {
-        if (value == 0) {
-            return "0x00";
-        }
-        uint256 temp = value;
-        uint256 length = 0;
-        while (temp != 0) {
-            length++;
-            temp >>= 8;
-        }
-        return toHexString(value, length);
-    }
-
-    /**
-     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
-     */
-    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
-        bytes memory buffer = new bytes(2 * length + 2);
-        buffer[0] = "0";
-        buffer[1] = "x";
-        for (uint256 i = 2 * length + 1; i > 1; --i) {
-            buffer[i] = _HEX_SYMBOLS[value & 0xf];
-            value >>= 4;
-        }
-        require(value == 0, "Strings: hex length insufficient");
-        return string(buffer);
-    }
-}
-
-
-// File @openzeppelin/contracts/utils/introspection/ERC165.sol@v4.3.0
-
-
-
-pragma solidity ^0.8.0;
-
-/**
- * @dev Implementation of the {IERC165} interface.
- *
- * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
- * for the additional interface id that will be supported. For example:
- *
- * ```solidity
- * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
- *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
- * }
- * ```
- *
- * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
- */
-abstract contract ERC165 is IERC165 {
-    /**
-     * @dev See {IERC165-supportsInterface}.
-     */
-    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
-        return interfaceId == type(IERC165).interfaceId;
-    }
-}
-
-
-// File @openzeppelin/contracts/token/ERC20/IERC20.sol@v4.3.0
-
-
-
-pragma solidity ^0.8.0;
-
-/**
- * @dev Interface of the ERC20 standard as defined in the EIP.
- */
-interface IERC20 {
-    /**
-     * @dev Returns the amount of tokens in existence.
-     */
-    function totalSupply() external view returns (uint256);
-
-    /**
-     * @dev Returns the amount of tokens owned by `account`.
-     */
-    function balanceOf(address account) external view returns (uint256);
-
-    /**
-     * @dev Moves `amount` tokens from the caller's account to `recipient`.
-     *
-     * Returns a boolean value indicating whether the operation succeeded.
-     *
-     * Emits a {Transfer} event.
-     */
-    function transfer(address recipient, uint256 amount) external returns (bool);
-
-    /**
-     * @dev Returns the remaining number of tokens that `spender` will be
-     * allowed to spend on behalf of `owner` through {transferFrom}. This is
-     * zero by default.
-     *
-     * This value changes when {approve} or {transferFrom} are called.
-     */
-    function allowance(address owner, address spender) external view returns (uint256);
-
-    /**
-     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
-     *
-     * Returns a boolean value indicating whether the operation succeeded.
-     *
-     * IMPORTANT: Beware that changing an allowance with this method brings the risk
-     * that someone may use both the old and the new allowance by unfortunate
-     * transaction ordering. One possible solution to mitigate this race
-     * condition is to first reduce the spender's allowance to 0 and set the
-     * desired value afterwards:
-     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
-     *
-     * Emits an {Approval} event.
-     */
-    function approve(address spender, uint256 amount) external returns (bool);
-
-    /**
-     * @dev Moves `amount` tokens from `sender` to `recipient` using the
-     * allowance mechanism. `amount` is then deducted from the caller's
-     * allowance.
-     *
-     * Returns a boolean value indicating whether the operation succeeded.
-     *
-     * Emits a {Transfer} event.
-     */
-    function transferFrom(
-        address sender,
-        address recipient,
-        uint256 amount
-    ) external returns (bool);
-
-    /**
-     * @dev Emitted when `value` tokens are moved from one account (`from`) to
-     * another (`to`).
-     *
-     * Note that `value` may be zero.
-     */
-    event Transfer(address indexed from, address indexed to, uint256 value);
-
-    /**
-     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
-     * a call to {approve}. `value` is the new allowance.
-     */
-    event Approval(address indexed owner, address indexed spender, uint256 value);
-}
-
-
-// File @openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol@v4.3.0
-
-
-
-pragma solidity ^0.8.0;
-
-
-/**
- * @title SafeERC20
- * @dev Wrappers around ERC20 operations that throw on failure (when the token
- * contract returns false). Tokens that return no value (and instead revert or
- * throw on failure) are also supported, non-reverting calls are assumed to be
- * successful.
- * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
- * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
- */
-library SafeERC20 {
-    using Address for address;
-
-    function safeTransfer(
-        IERC20 token,
-        address to,
-        uint256 value
-    ) internal {
-        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
-    }
-
-    function safeTransferFrom(
-        IERC20 token,
-        address from,
-        address to,
-        uint256 value
-    ) internal {
-        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
-    }
-
-    /**
-     * @dev Deprecated. This function has issues similar to the ones found in
-     * {IERC20-approve}, and its usage is discouraged.
-     *
-     * Whenever possible, use {safeIncreaseAllowance} and
-     * {safeDecreaseAllowance} instead.
-     */
-    function safeApprove(
-        IERC20 token,
-        address spender,
-        uint256 value
-    ) internal {
-        // safeApprove should only be called when setting an initial allowance,
-        // or when resetting it to zero. To increase and decrease it, use
-        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
-        require(
-            (value == 0) || (token.allowance(address(this), spender) == 0),
-            "SafeERC20: approve from non-zero to non-zero allowance"
-        );
-        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
-    }
-
-    function safeIncreaseAllowance(
-        IERC20 token,
-        address spender,
-        uint256 value
-    ) internal {
-        uint256 newAllowance = token.allowance(address(this), spender) + value;
-        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
-    }
-
-    function safeDecreaseAllowance(
-        IERC20 token,
-        address spender,
-        uint256 value
-    ) internal {
-        unchecked {
-            uint256 oldAllowance = token.allowance(address(this), spender);
-            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
-            uint256 newAllowance = oldAllowance - value;
-            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
-        }
-    }
-
-    /**
-     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
-     * on the return value: the return value is optional (but if data is returned, it must not be false).
-     * @param token The token targeted by the call.
-     * @param data The call data (encoded using abi.encode or one of its variants).
-     */
-    function _callOptionalReturn(IERC20 token, bytes memory data) private {
-        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
-        // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
-        // the target address contains contract code and also asserts for success in the low-level call.
-
-        bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
-        if (returndata.length > 0) {
-            // Return data is optional
-            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
-        }
-    }
-}
-
-
-// File @openzeppelin/contracts/access/Ownable.sol@v4.3.0
-
-
-
-pragma solidity ^0.8.0;
-
-/**
- * @dev Contract module which provides a basic access control mechanism, where
- * there is an account (an owner) that can be granted exclusive access to
- * specific functions.
- *
- * By default, the owner account will be the one that deploys the contract. This
- * can later be changed with {transferOwnership}.
- *
- * This module is used through inheritance. It will make available the modifier
- * `onlyOwner`, which can be applied to your functions to restrict their use to
- * the owner.
- */
-abstract contract Ownable is Context {
-    address private _owner;
-
-    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
-
-    /**
-     * @dev Initializes the contract setting the deployer as the initial owner.
-     */
-    constructor() {
-        _setOwner(_msgSender());
-    }
-
-    /**
-     * @dev Returns the address of the current owner.
-     */
-    function owner() public view virtual returns (address) {
-        return _owner;
-    }
-
-    /**
-     * @dev Throws if called by any account other than the owner.
-     */
-    modifier onlyOwner() {
-        require(owner() == _msgSender(), "Ownable: caller is not the owner");
-        _;
-    }
-
-    /**
-     * @dev Leaves the contract without owner. It will not be possible to call
-     * `onlyOwner` functions anymore. Can only be called by the current owner.
-     *
-     * NOTE: Renouncing ownership will leave the contract without an owner,
-     * thereby removing any functionality that is only available to the owner.
-     */
-    function renounceOwnership() public virtual onlyOwner {
-        _setOwner(address(0));
-    }
-
-    /**
-     * @dev Transfers ownership of the contract to a new account (`newOwner`).
-     * Can only be called by the current owner.
-     */
-    function transferOwnership(address newOwner) public virtual onlyOwner {
-        require(newOwner != address(0), "Ownable: new owner is the zero address");
-        _setOwner(newOwner);
-    }
-
-    function _setOwner(address newOwner) private {
-        address oldOwner = _owner;
-        _owner = newOwner;
-        emit OwnershipTransferred(oldOwner, newOwner);
-    }
-}
-
-
-// File @uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router01.sol@v1.1.0-beta.0
-
-pragma solidity >=0.6.2;
-
-interface IUniswapV2Router01 {
-    function factory() external pure returns (address);
-    function WETH() external pure returns (address);
-
-    function addLiquidity(
-        address tokenA,
-        address tokenB,
-        uint amountADesired,
-        uint amountBDesired,
-        uint amountAMin,
-        uint amountBMin,
-        address to,
-        uint deadline
-    ) external returns (uint amountA, uint amountB, uint liquidity);
-    function addLiquidityETH(
-        address token,
-        uint amountTokenDesired,
-        uint amountTokenMin,
-        uint amountETHMin,
-        address to,
-        uint deadline
-    ) external payable returns (uint amountToken, uint amountETH, uint liquidity);
-    function removeLiquidity(
-        address tokenA,
-        address tokenB,
-        uint liquidity,
-        uint amountAMin,
-        uint amountBMin,
-        address to,
-        uint deadline
-    ) external returns (uint amountA, uint amountB);
-    function removeLiquidityETH(
-        address token,
-        uint liquidity,
-        uint amountTokenMin,
-        uint amountETHMin,
-        address to,
-        uint deadline
-    ) external returns (uint amountToken, uint amountETH);
-    function removeLiquidityWithPermit(
-        address tokenA,
-        address tokenB,
-        uint liquidity,
-        uint amountAMin,
-        uint amountBMin,
-        address to,
-        uint deadline,
-        bool approveMax, uint8 v, bytes32 r, bytes32 s
-    ) external returns (uint amountA, uint amountB);
-    function removeLiquidityETHWithPermit(
-        address token,
-        uint liquidity,
-        uint amountTokenMin,
-        uint amountETHMin,
-        address to,
-        uint deadline,
-        bool approveMax, uint8 v, bytes32 r, bytes32 s
-    ) external returns (uint amountToken, uint amountETH);
-    function swapExactTokensForTokens(
-        uint amountIn,
-        uint amountOutMin,
-        address[] calldata path,
-        address to,
-        uint deadline
-    ) external returns (uint[] memory amounts);
-    function swapTokensForExactTokens(
-        uint amountOut,
-        uint amountInMax,
-        address[] calldata path,
-        address to,
-        uint deadline
-    ) external returns (uint[] memory amounts);
-    function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
-        external
-        payable
-        returns (uint[] memory amounts);
-    function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
-        external
-        returns (uint[] memory amounts);
-    function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
-        external
-        returns (uint[] memory amounts);
-    function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
-        external
-        payable
-        returns (uint[] memory amounts);
-
-    function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
-    function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
-    function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
-    function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
-    function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
-}
-
-
-// File @uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router02.sol@v1.1.0-beta.0
-
-pragma solidity >=0.6.2;
-
-interface IUniswapV2Router02 is IUniswapV2Router01 {
-    function removeLiquidityETHSupportingFeeOnTransferTokens(
-        address token,
-        uint liquidity,
-        uint amountTokenMin,
-        uint amountETHMin,
-        address to,
-        uint deadline
-    ) external returns (uint amountETH);
-    function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
-        address token,
-        uint liquidity,
-        uint amountTokenMin,
-        uint amountETHMin,
-        address to,
-        uint deadline,
-        bool approveMax, uint8 v, bytes32 r, bytes32 s
-    ) external returns (uint amountETH);
-
-    function swapExactTokensForTokensSupportingFeeOnTransferTokens(
-        uint amountIn,
-        uint amountOutMin,
-        address[] calldata path,
-        address to,
-        uint deadline
-    ) external;
-    function swapExactETHForTokensSupportingFeeOnTransferTokens(
-        uint amountOutMin,
-        address[] calldata path,
-        address to,
-        uint deadline
-    ) external payable;
-    function swapExactTokensForETHSupportingFeeOnTransferTokens(
-        uint amountIn,
-        uint amountOutMin,
-        address[] calldata path,
-        address to,
-        uint deadline
-    ) external;
-}
-
-
-// File @uniswap/v2-core/contracts/interfaces/IUniswapV2Factory.sol@v1.0.1
-
-pragma solidity >=0.5.0;
-
-interface IUniswapV2Factory {
-    event PairCreated(address indexed token0, address indexed token1, address pair, uint);
-
-    function feeTo() external view returns (address);
-    function feeToSetter() external view returns (address);
-
-    function getPair(address tokenA, address tokenB) external view returns (address pair);
-    function allPairs(uint) external view returns (address pair);
-    function allPairsLength() external view returns (uint);
-
-    function createPair(address tokenA, address tokenB) external returns (address pair);
-
-    function setFeeTo(address) external;
-    function setFeeToSetter(address) external;
-}
-
-
-// File contracts/SparkLink.sol
-
-
-
-pragma solidity >= 0.8.4;
-
-
-
-
-
-
-
-
-
-
-
-
-
-contract SparkLink is Ownable, ERC165, IERC721, IERC721Metadata{
-    using Address for address;
-    using Counters for Counters.Counter;
-    using SafeERC20 for IERC20;
-    Counters.Counter private _issueIds;
-    /*
-    Abstract struct Issue {
-        uint32 total_amount;
-        bool is_free
-        bool is_ND;
-        bool is_NC;
-        uint16 shill_times;
-        uint8 royalty_fee;
-    }
-    This structure records some common attributes of a series of NFTs:
-        - `royalty_fee`: the proportion of royaltyes
-        - `shill_times`: the number of times a single NFT can been shared
-        - `total_amount`: the total number of NFTs in the series
-    To reduce gas cost, this structure is actually stored in the `father_id` attibute of root NFT
-        - 0~31  `total_amount`
-        - 37 `is_free`
-        - 38 `is_NC`
-        - 39 `is_ND`
-        - 40~55 `shill_times`
-        - 56~63 `royalty_fee`
-    */
-
-    struct Edition {
-        // This structure stores NFT related information:
-        //  - `father_id`: For root NFT it stores issue abstract sturcture
-        //                 For other NFTs its stores the NFT Id of which NFT it `acceptShill` from
-        // - `shill_price`: The price should be paid when others `accpetShill` from this NFT
-        // - remaining_shill_times: The initial value is the shilltimes of the issue it belongs to
-        //                       When others `acceptShill` from this NFT, it will subtract one until its value is 0  
-        // - `owner`: record the owner of this NFT
-        // - `ipfs_hash`: IPFS hash value of the URI where this NTF's metadata stores
-        // - `transfer_price`: The initial value is zero
-        //                   Set by `determinePrice` or `determinePriceAndApprove` before `transferFrom`
-        //                   It will be checked wether equal to msg.value when `transferFrom` is called
-        //                   After `transferFrom` this value will be set to zero
-        // - `profit`: record the profit owner can claim (include royalty fee it should conduct to its father NFT)
-        uint64 father_id;
-        uint128 shill_price;
-        uint16 remaining_shill_times;
-        address owner;
-        bytes32 ipfs_hash;
-        uint128 transfer_price;
-        uint128 profit;
-    }
-
-    // Emit when `determinePrice` success
-    event DeterminePrice(
-        uint64 indexed NFT_id,
-        uint128 transfer_price
-    );
-
-    // Emit when `determinePriceAndApprove` success
-    event DeterminePriceAndApprove(
-        uint64 indexed NFT_id,
-        uint128 transfer_price,
-        address indexed to
-    );
-
-    // Emit when `publish` success
-    // - `rootNFTId`: Record the Id of root NFT given to publisher 
-    event Publish(
-        address indexed publisher,
-        uint64  indexed rootNFTId,
-        address token_addr
-    );
-
-    // Emit when claimProfit success
-    //- `amount`: Record the actual amount owner of this NFT received (profit - profit*royalty_fee/100)
-    event Claim(
-        uint64 indexed NFT_id,
-        address indexed receiver,
-        uint128 amount
-    );
-    // Emit when setURI success
-    event SetURI(
-        uint64 indexed NFT_id,
-        bytes32 old_URI,
-        bytes32 new_URI
-    );
-
-    event Label(
-        uint64 indexed NFT_id,
-        string content
-    );
-
-    event SetDAOFee(
-        uint8 old_DAO_fee,
-        uint8 new_DAO_fee
-    );
-
-    event SetLoosRatio(
-        uint8 old_loss_ratio,
-        uint8 new_loss_ratio
-    );
-
-    event SetDAORouter01(
-        address old_router_address,
-        address new_router_address
-    );
-
-    event SetDAORouter02(
-        address old_router_address,
-        address new_router_address
-    );
-
-    //----------------------------------------------------------------------------------------------------
-    /**
-     * @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
-     */
-    constructor(address DAO_router_address01,address DAO_router_address02, address uniswapRouterAddress, address factoryAddress) {
-        uniswapV2Router =  IUniswapV2Router02(uniswapRouterAddress);
-        uniswapV2Factory = IUniswapV2Factory(factoryAddress);
-        DAO_router01 = DAO_router_address01;
-        DAO_router02 = DAO_router_address02;
-        _name = "SparkLink";
-        _symbol = "SPL";
-    } 
-    
-   /**
-     * @dev Create a issue and mint a root NFT for buyer acceptShill from
-     *
-     * Requirements:
-     *
-     * - `_first_sell_price`: The price should be paid when others `accpetShill` from this NFT
-     * - `_royalty_fee`: The proportion of royaltyes, it represents the ratio of the father NFT's profit from the child NFT
-     *                   Its value should <= 100
-     * - `_shill_times`: the number of times a single NFT can been shared
-     *                   Its value should <= 65536
-     * - `_ipfs_hash`: IPFS hash value of the URI where this NTF's metadata stores
-     *
-     * - `token_address`: list of tokens(address) can be accepted for payment.
-     *                 `A token address` can be ERC-20 token contract address or `address(0)`(ETH).
-     *
-     * - `_is_free`:
-     * - `_is_NC`: 
-     * 
-     * - `_is_ND`: 
-     * Emits a {Publish} event.
-     * - Emitted {Publish} event contains root NFT id.
-     */
-    function publish(
-        uint128 _first_sell_price,
-        uint8 _royalty_fee,
-        uint16 _shill_times,
-        bytes32 _ipfs_hash,
-        address _token_addr,
-        bool _is_free,
-        bool _is_NC,
-        bool _is_ND
-    ) 
-        external 
-    {
-        require(_royalty_fee <= 100, "SparkLink: Royalty fee should be <= 100%.");
-        _issueIds.increment();
-        require(_issueIds.current() <= type(uint32).max, "SparkLink: Value doesn't fit in 32 bits.");
-        if (_token_addr != address(0))
-            require(IERC20(_token_addr).totalSupply() > 0, "Not a valid ERC20 token address");
-        uint32 new_issue_id = uint32(_issueIds.current());
-        uint64 rootNFTId = getNftIdByEditionIdAndIssueId(new_issue_id, 1);
-        require(
-            _checkOnERC721Received(address(0), msg.sender, rootNFTId, ""),
-            "SparkLink: Transfer to non ERC721Receiver implementer"
-        );
-
-        Edition storage new_NFT = editions_by_id[rootNFTId];
-        uint64 information;
-        information = reWriteUint8InUint64(56, _royalty_fee, information);
-        information = reWriteUint16InUint64(40, _shill_times, information);
-        information = reWriteBoolInUint64(37, _is_free, information);
-        information = reWriteBoolInUint64(38, _is_NC, information);
-        information = reWriteBoolInUint64(39, _is_ND, information);
-        information += 1;
-        token_addresses[new_issue_id] = _token_addr;
-        new_NFT.father_id = information;
-        new_NFT.remaining_shill_times = _shill_times;
-        new_NFT.shill_price = _first_sell_price;
-        new_NFT.owner = msg.sender;
-        new_NFT.ipfs_hash = _ipfs_hash;
-        _balances[msg.sender] += 1;
-        emit Transfer(address(0), msg.sender, rootNFTId);
-        emit Publish(
-            msg.sender,
-            rootNFTId,
-            _token_addr
-        );
-    }
-
-    /**
-     * @dev Buy a child NFT from the _NFT_id buyer input
-     *
-     * Requirements:
-     *
-     * - `_NFT_id`: _NFT_id the father NFT id buyer mint NFT from
-     *              remain shill times of the NFT_id you input should greater than 0
-     * Emits a {Ttansfer} event.
-     * - Emitted {Transfer} event from 0x0 address to msg.sender, contain new NFT id.
-     * - New NFT id will be generater by edition id and issue id
-     *   0~31 edition id
-     *   32~63 issue id
-     */
-    function acceptShill(
-        uint64 _NFT_id
-    ) 
-        external 
-        payable 
-    {
-        require(isEditionExisting(_NFT_id), "SparkLink: This NFT does not exist");
-        require(editions_by_id[_NFT_id].remaining_shill_times > 0, "SparkLink: There is no remaining shill time for this NFT");
-        if (!isRootNFT(_NFT_id)||!getIsFreeByNFTId(_NFT_id)){
-            address token_addr = getTokenAddrByNFTId(_NFT_id);
-            if (token_addr == address(0)){
-                require(msg.value == editions_by_id[_NFT_id].shill_price, "SparkLink: Wrong price");
-                _addProfit( _NFT_id, editions_by_id[_NFT_id].shill_price);
-            }
-            else {
-                uint256 before_balance = IERC20(token_addr).balanceOf(address(this));
-                IERC20(token_addr).safeTransferFrom(msg.sender, address(this), editions_by_id[_NFT_id].shill_price);
-                _addProfit( _NFT_id, uint256toUint128(IERC20(token_addr).balanceOf(address(this))-before_balance));
-            }
-        }
-        editions_by_id[_NFT_id].remaining_shill_times -= 1;
-        _mintNFT(_NFT_id, msg.sender);
-        if (editions_by_id[_NFT_id].remaining_shill_times == 0)
-            _mintNFT(_NFT_id, ownerOf(_NFT_id));
-    }
-
-    /**
-     * @dev Transfers `tokenId` token from `from` to `to`.
-     *      
-     * Requirements:
-     *
-     * - `from` cannot be the zero address.
-     * - `to` cannot be the zero address.
-     * - `tokenId` token must be owned by `from`.
-     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
-     * - If `transfer_price` has been set, caller should give same value in msg.sender.
-     * - Will call `claimProfit` before transfer and `transfer_price` will be set to zero after transfer. 
-     * Emits a {TransferAsset} events
-     */
-    function transferFrom(address from, address to, uint256 tokenId) external payable override {
-        _transfer(from, to, uint256toUint64(tokenId));
-    }
-
-    function safeTransferFrom(address from, address to, uint256 tokenId) external payable override{
-       _safeTransfer(from, to, uint256toUint64(tokenId), "");
-    }
-
-    function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata _data) external payable override {
-        _safeTransfer(from, to, uint256toUint64(tokenId), _data);
-    }
-    
-    /**
-     * @dev Claim profit from reward pool of NFT.
-     *      
-     * Requirements:
-     *
-     * - `_NFT_id`: The NFT id of NFT caller claim, the profit will give to its owner.
-     * - If its profit is zero the event {Claim} will not be emited.
-     * Emits a {Claim} events
-     */
-    function claimProfit(uint64 _NFT_id) public {
-        require(isEditionExisting(_NFT_id), "SparkLink: This edition does not exist");
-        
-        if (editions_by_id[_NFT_id].profit != 0) {
-            uint128 amount = editions_by_id[_NFT_id].profit;
-            address token_addr = getTokenAddrByNFTId(_NFT_id);
-            if (DAO_fee != 0) {
-                uint128 DAO_amount = calculateFee(amount, DAO_fee);
-                amount -= DAO_amount;
-                if (token_addr == address(0)) {
-                    payable(DAO_router01).transfer(DAO_amount);
-                }
-                else if (uniswapV2Factory.getPair(token_addr, uniswapV2Router.WETH()) == address(0)) {
-                    IERC20(token_addr).safeTransfer(DAO_router02,DAO_amount);
-                }
-                else {
-                    _swapTokensForEth(token_addr, DAO_amount);
-                }
-            }
-            editions_by_id[_NFT_id].profit = 0;
-            if (!isRootNFT(_NFT_id)) {
-                uint128 _royalty_fee = calculateFee(amount, getRoyaltyFeeByNFTId(_NFT_id));
-                _addProfit(getFatherByNFTId(_NFT_id), _royalty_fee);
-                amount -= _royalty_fee;
-            }
-            if (token_addr == address(0)){
-                payable(ownerOf(_NFT_id)).transfer(amount);
-            }
-            else {
-                IERC20(token_addr).safeTransfer(ownerOf(_NFT_id), amount);
-            }
-            emit Claim(
-                _NFT_id,
-                ownerOf(_NFT_id),
-                amount
-            );
-        }
-    }
-
-    /**
-     * @dev Set token URI.
-     *
-     * Requirements:
-     *
-     * - `_NFT_id`: transferred token id.
-     * - `ipfs_hash`: ipfs hash value of the URI will be set.
-     * Emits a {SetURI} events
-     */
-    function setURI(uint64 _NFT_id, bytes32 ipfs_hash) public {
-        if (getIsNDByNFTId(_NFT_id)) {
-            require(_NFT_id == getRootNFTIdByNFTId(_NFT_id), "SparkLink: NFT follows the ND protocol, only the root NFT's URI can be set.");
-        }
-        require(ownerOf(_NFT_id) == msg.sender, "SparkLink: Only owner can set the token URI");
-        _setTokenURI(_NFT_id, ipfs_hash);
-    }
-
-     /**
-     * @dev update token URI.
-     *
-     * Requirements:
-     *
-     * - `_NFT_id`: transferred token id.
-     */
-    function updateURI(uint64 _NFT_id) public{
-        require(ownerOf(_NFT_id) == msg.sender, "SparkLink: Only owner can update the token URI");
-        editions_by_id[_NFT_id].ipfs_hash = editions_by_id[getRootNFTIdByNFTId(_NFT_id)].ipfs_hash;
-    }
-
-    function label(uint64 _NFT_id, string memory content) public {
-        require(ownerOf(_NFT_id) == msg.sender, "SparkLink: Only owner can label this NFT");
-        emit Label(_NFT_id, content);
-    }
-    /**
-     * @dev Determine NFT price before transfer.
-     *
-     * Requirements:
-     *
-     * - `_NFT_id`: transferred token id.
-     * - `_price`: The amount of ETH should be payed for `_NFT_id`
-     * Emits a {DeterminePrice} events
-     */
-    function determinePrice(
-        uint64 _NFT_id,
-        uint128 _price
-    ) 
-        public 
-    {
-        require(isEditionExisting(_NFT_id), "SparkLink: This NFT does not exist");
-        require(msg.sender == ownerOf(_NFT_id), "SparkLink: Only owner can set the price");
-        editions_by_id[_NFT_id].transfer_price = _price;
-        emit DeterminePrice(_NFT_id, _price);
-    }
-
-    /**
-     * @dev Determine NFT price before transfer.
-     *
-     * Requirements:
-     *
-     * - `_NFT_id`: transferred token id.
-     * - `_price`: The amount of ETH should be payed for `_NFT_id`
-     * - `_to`: The account address `approve` to. 
-     * Emits a {DeterminePriceAndApprove} events
-     */
-    function determinePriceAndApprove(
-        uint64 _NFT_id,
-        uint128 _price,
-        address _to
-    ) 
-        public 
-    {
-        determinePrice(_NFT_id, _price);
-        approve(_to, _NFT_id);
-        emit DeterminePriceAndApprove(_NFT_id, _price, _to);
-    }
-
-    function setDAOFee(uint8 _DAO_fee) public onlyOwner {
-        require(_DAO_fee <= MAX_DAO_FEE, "SparkLink: DAO fee can not exceed 5%");
-        emit SetDAOFee(DAO_fee, _DAO_fee);
-        DAO_fee = _DAO_fee;
-    }
-
-    function setDAORouter01(address _DAO_router01) public onlyOwner {
-        emit SetDAORouter01(DAO_router01, _DAO_router01);
-        DAO_router01 = _DAO_router01;
-    }
-
-    function setDAORouter02(address _DAO_router02) public onlyOwner {
-        emit SetDAORouter01(DAO_router02, _DAO_router02);
-        DAO_router02 = _DAO_router02;
-    }
-
-    function setUniswapV2Router(address _uniswapV2Router) public onlyOwner {
-        uniswapV2Router =  IUniswapV2Router02(_uniswapV2Router);
-    }
-    function setUniswapV2Factory(address _uniswapV2Factory) public onlyOwner {
-        uniswapV2Factory = IUniswapV2Factory(_uniswapV2Factory);
-    }
-
-    function setLoosRatio(uint8 _loss_ratio) public onlyOwner {
-        require(_loss_ratio <= MAX_LOSS_RATIO, "SparkLink: Loss ratio can not below 50%");
-        emit SetLoosRatio(loss_ratio, _loss_ratio);
-        loss_ratio = _loss_ratio;
-    }
-    /**
-     * @dev See {IERC721-approve}.
-     */
-    function approve(address to, uint256 tokenId) public virtual override {
-        address owner = ownerOf(tokenId);
-        require(to != owner, "SparkLink: Approval to current owner");
-        require(
-            _msgSender() == owner || isApprovedForAll(owner, _msgSender()),
-            "SparkLink: Approve caller is not owner nor approved for all"
-        );
-
-        _approve(to, uint256toUint64(tokenId));
-    }
-
-    /**
-     * @dev See {IERC721-setApprovalForAll}.
-     */
-    function setApprovalForAll(address operator, bool approved) public virtual override {
-        require(operator != _msgSender(), "SparkLink: Approve to caller");
-        _operatorApprovals[_msgSender()][operator] = approved;
-        emit ApprovalForAll(_msgSender(), operator, approved);
-    }
-
-    /**
-     * @dev See {IERC165-supportsInterface}.
-     */
-    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
-        return
-            interfaceId == type(IERC721).interfaceId ||
-            interfaceId == type(IERC721Metadata).interfaceId ||
-            super.supportsInterface(interfaceId);
-    }
-
-    /**
-     * @dev See {IERC721-balanceOf}.
-     */
-    function balanceOf(address owner) public view virtual override returns (uint256) {
-        require(owner != address(0), "SparkLink: Balance query for the zero address");
-        return _balances[owner];
-    }
-
-    /**
-     * @dev See {IERC721-ownerOf}.
-     */
-    function ownerOf(uint256 tokenId) public view virtual override returns (address) {
-        address owner = editions_by_id[uint256toUint64(tokenId)].owner;
-        require(owner != address(0), "SparkLink: Owner query for nonexistent token");
-        return owner;
-    }
-
-    /**
-     *                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        @dev See {IERC721Metadata-name}.
-     */
-    function name() public view virtual override returns (string memory) {
-        return _name;
-    }
-
-    /**
-     * @dev See {IERC721Metadata-symbol}.
-     */
-    function symbol() public view virtual override returns (string memory) {
-        return _symbol;
-    }
-    
-    /**
-     * @dev Query NFT information set.
-     *
-     * Requirements:
-     * - `_NFT_id`: The id of the edition queryed.
-     * Return :
-     * - `issue_information`: For root NFT it stores issue abstract sturcture
-     * - 0~31   `total_amount`
-     * - 37     `is_free`
-     * - 38     `is_NC`
-     * - 39     `is_ND`
-     * - 40~55  `shill_times`
-     * - 56~63 `royalty_fee`
-     * - `father_id`: For root NFT it stores issue abstract sturcture
-     *                For other NFTs its stores the NFT Id of which NFT it `acceptShill` from
-     * - `shill_price`: The price should be paid when others `accpetShill` from this NFT
-     * - `remaining_shill_times`: The initial value is the shilltimes of the issue it belongs to
-     *                      When others `acceptShill` from this NFT, it will subtract one until its value is 0  
-     * - `owner`: record the owner of this NFT
-     * - `transfer_price`: The initial value is zero
-     *                  Set by `determinePrice` or `determinePriceAndApprove` before `transferFrom`
-     *                  It will be checked wether equal to msg.value when `transferFrom` is called
-     *                  After `transferFrom` this value will be set to zero
-     * - `profit`: record the profit owner can claim (include royalty fee it should conduct to its father NFT)
-     * - `metadata`: IPFS hash value of the URI where this NTF's metadata stores
-     */
-
-    function getNFTInfoByNFTID(uint64 _NFT_id) 
-        public view  
-        returns (
-            uint64 issue_information,
-            uint64 father_id,
-            uint128 shill_price,
-            uint16 remain_shill_times,
-            uint128 profit,
-            string memory metadata
-            ) 
-    {
-        require(isEditionExisting(_NFT_id), "SparkLink: Approved query for nonexistent token");
-        return(
-            editions_by_id[getRootNFTIdByNFTId(_NFT_id)].father_id,
-            getFatherByNFTId(_NFT_id),
-            editions_by_id[_NFT_id].shill_price,
-            getRemainShillTimesByNFTId(_NFT_id),
-            getProfitByNFTId(_NFT_id),
-            tokenURI(_NFT_id)
-        );
-    }
-
-    /**
-     * @dev See {IERC721-getApproved}.
-     */
-    function getApproved(uint256 tokenId) public view virtual override returns (address) {
-        require(isEditionExisting(uint256toUint64(tokenId)), "SparkLink: Approved query for nonexistent token");
-
-        return _tokenApprovals[uint256toUint64(tokenId)];
-    }
-
-    /**
-     * @dev See {IERC721-isApprovedForAll}.
-     */
-    function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
-        return _operatorApprovals[owner][operator];
-    }
-
-    /** 
-     * @dev See {IERC721Metadata-tokenURI}.
-     */
-    function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
-        require(isEditionExisting(uint256toUint64(tokenId)), "SparkLink: URI query for nonexistent token");
-        bytes32 _ipfs_hash = editions_by_id[uint256toUint64(tokenId)].ipfs_hash;
-        string memory encoded_hash = _toBase58String(_ipfs_hash);
-        string memory base = _baseURI();
-        return string(abi.encodePacked(base, encoded_hash));
-    }
-
-  /**
-     * @dev Query is issue free for first lever buyer.
-     *
-     * Requirements:
-     * - `_NFT_id`: The id of the edition queryed.
-     * Return a bool value.
-     */
-    function getIsFreeByNFTId(uint64 _NFT_id) public view returns (bool) {
-        require(isEditionExisting(_NFT_id), "SparkLink: Edition is not exist.");
-        return getBoolFromUint64(37, editions_by_id[getRootNFTIdByNFTId(_NFT_id)].father_id);
-    }
-
-    /**
-     * @dev Query is issue follows the NC protocol by any NFT belongs to this issue.
-     *
-     * Requirements:
-     * - `_NFT_id`: The id of the edition queryed.
-     * Return a bool value.
-     */
-    function getIsNCByNFTId(uint64 _NFT_id) public view returns (bool) {
-        require(isEditionExisting(_NFT_id), "SparkLink: Edition is not exist.");
-        return getBoolFromUint64(38, editions_by_id[getRootNFTIdByNFTId(_NFT_id)].father_id);
-    }
-
-    /**
-     * @dev Query is issue follows the ND protocol by any NFT belongs to this issue.
-     *
-     * Requirements:
-     * - `_NFT_id`: The id of the edition queryed.
-     * Return a bool value.
-     */
-    function getIsNDByNFTId(uint64 _NFT_id) public view returns (bool) {
-        require(isEditionExisting(_NFT_id), "SparkLink: Edition is not exist.");
-        return getBoolFromUint64(39, editions_by_id[getRootNFTIdByNFTId(_NFT_id)].father_id);
-    }
-
-    /**
-     * @dev Query is edition exist.
-     *
-     * Requirements:
-     * - `_NFT_id`: The id of the edition queryed.
-     * Return a bool value.
-     */
-    function isEditionExisting(uint64 _NFT_id) public view returns (bool) {
-        return (editions_by_id[_NFT_id].owner != address(0));
-    }
-
-    /**
-     * @dev Query the amount of ETH a NFT can be claimed.
-     *  
-     * Requirements:
-     * - `_NFT_id`: The id of the NFT queryed.
-     * Return the value this NFT can be claimed.
-     * If the NFT is not root NFT, this value will subtract royalty fee percent.
-     */
-    function getProfitByNFTId(uint64 _NFT_id) public view returns (uint128){
-        require(isEditionExisting(_NFT_id), "SparkLink: Edition is not exist.");
-        uint128 amount = editions_by_id[_NFT_id].profit;
-         if (DAO_fee != 0) {
-                uint128 DAO_amount = calculateFee(amount, DAO_fee);
-                amount -= DAO_amount;
-        }
-        if (!isRootNFT(_NFT_id)) {
-            uint128 _total_fee = calculateFee(amount, getRoyaltyFeeByNFTId(_NFT_id));            
-            amount -= _total_fee;
-        }
-        return amount;
-    }
-
-    /**
-     * @dev Query royalty fee percent of an issue by any NFT belongs to this issue.
-     *  
-     * Requirements:
-     * - `_NFT_id`: The id of the NFT queryed.
-     * Return royalty fee percent of this issue.
-     */
-    function getRoyaltyFeeByNFTId(uint64 _NFT_id) public view returns (uint8) {
-        require(isEditionExisting(_NFT_id), "SparkLink: Edition is not exist.");
-        return getUint8FromUint64(56, editions_by_id[getRootNFTIdByNFTId(_NFT_id)].father_id);
-    }
-
-    /**
-     * @dev Query max shill times of an issue by any NFT belongs to this issue.
-     *  
-     * Requirements:
-     * - `_NFT_id`: The id of the NFT queryed.
-     * Return max shill times of this issue.
-     */
-    function getShillTimesByNFTId(uint64 _NFT_id) public view returns (uint16) {
-        require(isEditionExisting(_NFT_id), "SparkLink: Edition is not exist.");
-        return getUint16FromUint64(40, editions_by_id[getRootNFTIdByNFTId(_NFT_id)].father_id);
-    }
-
-    /**
-     * @dev Query total NFT number of a issue by any NFT belongs to this issue.
-     *  
-     * Requirements:
-     * - `_NFT_id`: The id of the NFT queryed.
-     * Return total NFT number of this issue.
-     */
-    function getTotalAmountByNFTId(uint64 _NFT_id) public view returns (uint32) {
-        require(isEditionExisting(_NFT_id), "SparkLink: Edition is not exist.");
-        return getBottomUint32FromUint64(editions_by_id[getRootNFTIdByNFTId(_NFT_id)].father_id);
-    }
-
-    /**
-     * @dev Query supported token address of a issue by any NFT belongs to this issue.
-     *  
-     * Requirements:
-     * - `_NFT_id`: The id of the NFT queryed.
-     * Return supported token address of this NFT.
-     * Address 0 represent ETH.
-     */
-    function getTokenAddrByNFTId(uint64 _NFT_id) public view returns (address) {
-        require(isEditionExisting(_NFT_id), "SparkLink: Edition is not exist.");
-        return token_addresses[uint32(_NFT_id>>32)];
-    }
-
-    /**
-     * @dev Query the id of this NFT's father NFT.
-     *  
-     * Requirements:
-     * - `_NFT_id`: The id of the NFT queryed.
-     * - This NFT should exist and not be root NFT.
-     * Return the father NFT id of this NFT.
-     */
-    function getFatherByNFTId(uint64 _NFT_id) public view returns (uint64) {
-        require(isEditionExisting(_NFT_id), "SparkLink: Edition is not exist.");
-        if (isRootNFT(_NFT_id)) {
-            return 0;
-        }
-        return editions_by_id[_NFT_id].father_id;
-    }    
-    
-    /**
-     * @dev Query transfer_price of this NFT.
-     *  
-     * Requirements:
-     * - `_NFT_id`: The id of the NFT queryed.
-     * Return transfer_price of this NFT.
-     */
-    function getTransferPriceByNFTId(uint64 _NFT_id) public view returns (uint128) {
-        require(isEditionExisting(_NFT_id), "SparkLink: Edition is not exist.");
-        return editions_by_id[_NFT_id].transfer_price;
-    }
-
-    /**
-     * @dev Query shill_price of this NFT.
-     *  
-     * Requirements:
-     * - `_NFT_id`: The id of the NFT queryed.
-     * Return shill_price of this NFT.
-     */
-    function getShillPriceByNFTId(uint64 _NFT_id) public view returns (uint128) {
-        require(isEditionExisting(_NFT_id), "SparkLink: Edition is not exist.");
-        if (getIsFreeByNFTId(_NFT_id)&&isRootNFT(_NFT_id))
-            return 0;
-        else
-            return editions_by_id[_NFT_id].shill_price;
-    }
-
-    /**
-     * @dev Query remaining_shill_times of this NFT.
-     *  
-     * Requirements:
-     * - `_NFT_id`: The id of the NFT queryed.
-     * Return remaining_shill_times of this NFT.
-     */
-    function getRemainShillTimesByNFTId(uint64 _NFT_id) public view returns (uint16) {
-        require(isEditionExisting(_NFT_id), "SparkLink: Edition is not exist.");
-        return editions_by_id[_NFT_id].remaining_shill_times;
-    }
-
-    /**
-     * @dev Query depth of this NFT.
-     *  
-     * Requirements:
-     * - `_NFT_id`: The id of the NFT queryed.
-     * Return depth of this NFT.
-     */
-    function getDepthByNFTId(uint64 _NFT_id) public view returns (uint64) {
-        require(isEditionExisting(_NFT_id), "SparkLink: Edition is not exist.");
-        uint64 depth = 0;
-        for (depth = 0; !isRootNFT(_NFT_id); _NFT_id = getFatherByNFTId(_NFT_id)) {
-            depth += 1;
-        }
-        return depth;
-    }
-
-    /**
-     * @dev Query is this NFT is root NFT by check is its edition id is 1.
-     *  
-     * Requirements:
-     * - `_NFT_id`: The id of the NFT queryed.
-     * Return a bool value to indicate wether this NFT is root NFT.
-     */
-    function isRootNFT(uint64 _NFT_id) public pure returns (bool) {
-        return getBottomUint32FromUint64(_NFT_id) == uint32(1);
-    }
-
-    /**
-     * @dev Query root NFT id by NFT id.
-     *  
-     * Requirements:
-     * - `_NFT_id`: The id of the NFT queryed.
-     * Return a bool value to indicate wether this NFT is root NFT.
-     */
-    function getRootNFTIdByNFTId(uint64 _NFT_id) public pure returns (uint64) {
-        return ((_NFT_id>>32)<<32 | uint64(1));
-    }
-
-    /**
-     * @dev Query loss ratio of this contract.
-     *  
-     * Return loss ratio of this contract.
-     */
-    function getLossRatio() public view returns (uint8) {
-        return loss_ratio;
-    }
-    
-    /**
-     * @dev Calculate edition id by NFT id.
-     *  
-     * Requirements:
-     * - `_NFT_id`: The NFT id of the NFT caller want to get.
-     * Return edition id.
-     */
-    function getEditionIdByNFTId(uint64 _NFT_id) public pure returns (uint32) {
-        return getBottomUint32FromUint64(_NFT_id);
-    }
-    // Token name
-    string private _name;
-
-    // Token symbol
-    string private _symbol;
-    uint8 public loss_ratio = 62;
-    uint8 public DAO_fee = 2;
-    uint8 public constant MAX_DAO_FEE = 2;
-    uint8 public constant MAX_LOSS_RATIO = 50;
-    address public DAO_router01;
-    address public DAO_router02;
-    IUniswapV2Router02 public  uniswapV2Router;
-    IUniswapV2Factory public  uniswapV2Factory;
-    // Mapping owner address to token count
-    mapping(address => uint64) private _balances;
-    // Mapping from token ID to approved address
-    mapping(uint64 => address) private _tokenApprovals;
-    // Mapping from owner to operator approvals
-    mapping(address => mapping(address => bool)) private _operatorApprovals;
-    mapping (uint64 => Edition) private editions_by_id;
-    // mapping from issue ID to support ERC20 token address
-    mapping(uint32 => address) private token_addresses;
-
-    bytes constant private sha256MultiHash = hex"1220"; 
-    bytes constant private ALPHABET = '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz';
-
-    function _swapTokensForEth(address token_addr, uint128 token_amount) private {
-        // generate the uniswap pair path of token -> weth
-        address[] memory path = new address[](2);
-        path[0] = token_addr;
-        path[1] = uniswapV2Router.WETH();
-
-        IERC20(token_addr).approve(address(uniswapV2Router), token_amount);
-
-        // make the swap
-        uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
-            token_amount,
-            0, // accept any amount of ETH
-            path,
-            DAO_router01,
-            block.timestamp
-        );
-    }
-
-
-     /**
-     * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
-     * The call is not executed if the target address is not a contract.
-     *
-     * @param from address representing the previous owner of the given token ID
-     * @param to target address that will receive the tokens
-     * @param tokenId uint256 ID of the token to be transferred
-     * @param _data bytes optional data to send along with the call
-     * @return bool whether the call correctly returned the expected magic value
-     */
-    function _checkOnERC721Received(
-        address from,
-        address to,
-        uint64 tokenId,
-        bytes memory _data
-    ) 
-        private 
-        returns (bool) 
-    {
-        if (to.isContract()) {
-            try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
-                return retval == IERC721Receiver.onERC721Received.selector;
-            } catch (bytes memory reason) {
-                if (reason.length == 0) {
-                    revert("SparkLink: Transfer to non ERC721Receiver implementer");
-                } else {
-                    assembly {
-                        revert(add(32, reason), mload(reason))
-                    }
-                }
-            }
-        } else {
-            return true;
-        }
-    }
-
-    /**
-     * @dev Sets `_tokenURI` as the tokenURI of `tokenId`.
-     *
-     * Requirements:
-     *
-     * - `tokenId` must exist.
-     */
-    function _setTokenURI(uint64 tokenId, bytes32 ipfs_hash) internal virtual {
-        bytes32 old_URI = editions_by_id[tokenId].ipfs_hash;
-        editions_by_id[tokenId].ipfs_hash = ipfs_hash;
-        emit SetURI(tokenId, old_URI, ipfs_hash);
-    }
-    
-     /**
-     * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
-     * The call is not executed if the target address is not a contract.
-     *
-     * @param _NFT_id NFT id of father NFT
-     * @param _owner indicate the address new NFT transfer to
-     * @return a uint64 store new NFT id
-     **/
-    function _mintNFT(
-        uint64 _NFT_id,
-        address _owner
-    ) 
-        internal 
-        returns (uint64) 
-    {
-        _addTotalAmount(_NFT_id);
-        uint32 new_edition_id = getTotalAmountByNFTId(_NFT_id);
-        uint64 new_NFT_id = getNftIdByEditionIdAndIssueId(uint32(_NFT_id>>32), new_edition_id);
-        require(
-            _checkOnERC721Received(address(0), _owner, new_NFT_id, ""),
-            "SparkLink: Transfer to non ERC721Receiver implementer"
-        );
-        Edition storage new_NFT = editions_by_id[new_NFT_id];
-        new_NFT.remaining_shill_times = getShillTimesByNFTId(_NFT_id);
-        new_NFT.father_id = _NFT_id;
-        if (getIsFreeByNFTId(_NFT_id)&&isRootNFT(_NFT_id))
-            new_NFT.shill_price = editions_by_id[_NFT_id].shill_price;
-        else
-            new_NFT.shill_price = calculateFee(editions_by_id[_NFT_id].shill_price, loss_ratio);
-        if (new_NFT.shill_price == 0) {
-            new_NFT.shill_price = editions_by_id[_NFT_id].shill_price;
-        }
-        new_NFT.owner = _owner;
-        new_NFT.ipfs_hash = editions_by_id[_NFT_id].ipfs_hash;
-        _balances[_owner] += 1;
-        emit Transfer(address(0), _owner, new_NFT_id);
-        return new_NFT_id;
-    }
-
-    /**
-     * @dev Internal function to clear approve and transfer_price
-     *
-     * @param _NFT_id NFT id of father NFT
-     **/
-    function _afterTokenTransfer (uint64 _NFT_id) internal {
-        // Clear approvals from the previous owner
-        _approve(address(0), _NFT_id);
-        editions_by_id[_NFT_id].transfer_price = 0;
-    }
-
-    /**
-     * @dev Internal function to support transfer `tokenId` from `from` to `to`.
-     *
-     * @param from address representing the previous owner of the given token ID
-     * @param to target address that will receive the tokens
-     * @param tokenId uint256 ID of the token to be transferred
-     * Emits a {Transfer} event.
-     */
-    function _transfer(
-        address from,
-        address to,
-        uint64 tokenId
-    ) 
-        internal 
-        virtual 
-    {
-        require(ownerOf(tokenId) == from, "SparkLink: Transfer of token that is not own");
-        require(_isApprovedOrOwner(_msgSender(), tokenId), "SparkLink: Transfer caller is not owner nor approved");
-        require(to != address(0), "SparkLink: Transfer to the zero address");
-        if (msg.sender != ownerOf(tokenId)) {
-            address token_addr = getTokenAddrByNFTId(tokenId);
-            uint128 transfer_price = editions_by_id[tokenId].transfer_price;
-            if (token_addr == address(0)){
-                require(msg.value == transfer_price, "SparkLink: Price not met");
-                _addProfit(tokenId, transfer_price);
-            }
-            else {
-                uint256 before_balance = IERC20(token_addr).balanceOf(address(this));
-                IERC20(token_addr).safeTransferFrom(msg.sender, address(this), transfer_price);
-                _addProfit(tokenId, uint256toUint128(IERC20(token_addr).balanceOf(address(this))-before_balance));
-            }
-            claimProfit(tokenId);
-        }
-        else {
-            claimProfit(tokenId);
-        }
-        _afterTokenTransfer(tokenId);
-        _balances[from] -= 1;
-        _balances[to] += 1;
-        editions_by_id[tokenId].owner = to;
-        emit Transfer(from, to, tokenId);
-    }
-
-     /**
-     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
-     * are aware of the ERC721 protocol to prevent tokens from being forever locked.
-     *
-     * `_data` is additional data, it has no specified format and it is sent in call to `to`.
-     *
-     * This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
-     * implement alternative mechanisms to perform token transfer, such as signature-based.
-     *
-     * Requirements:
-     *
-     * - `from` cannot be the zero address.
-     * - `to` cannot be the zero address.
-     * - `tokenId` token must exist and be owned by `from`.
-     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
-     *
-     * Emits a {Transfer} event.
-     */
-    function _safeTransfer(
-        address from,
-        address to,
-        uint64 tokenId,
-        bytes memory _data
-    ) 
-        internal 
-        virtual 
-    {
-        _transfer(from, to, tokenId);
-        require(_checkOnERC721Received(from, to, tokenId, _data), "SparkLink: Transfer to non ERC721Receiver implementer");
-    }
-
-    /**
-     * @dev Approve `to` to operate on `tokenId`
-     *
-     * Emits a {Approval} event.
-     */
-    function _approve(address to, uint64 tokenId) internal virtual {
-        _tokenApprovals[tokenId] = to;
-        emit Approval(ownerOf(tokenId), to, tokenId);
-    }
-
-    function _addProfit(uint64 _NFT_id, uint128 _increase) internal {
-        editions_by_id[_NFT_id].profit = editions_by_id[_NFT_id].profit+_increase;
-    }
-
-    function _addTotalAmount(uint64 _NFT_Id) internal {
-        require(getTotalAmountByNFTId(_NFT_Id) < type(uint32).max, "SparkLink: There is no left in this issue.");
-        editions_by_id[getRootNFTIdByNFTId(_NFT_Id)].father_id += 1;
-    }
-
-    function _isApprovedOrOwner(address spender, uint64 tokenId) internal view virtual returns (bool) {
-        require(isEditionExisting(tokenId), "SparkLink: Operator query for nonexistent token");
-        address owner = ownerOf(tokenId);
-        return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
-    }
-        
-    function _baseURI() internal pure returns (string memory) {
-        return "https://ipfs.io/ipfs/";
-    } 
-
-
-    /**
-     * @dev Calculate NFT id by issue id and edition id.
-     *  
-     * Requirements:
-     * - `_issue_id`: The issue id of the NFT caller want to get.
-     * - `_edition_id`: The edition id of the NFT caller want to get.
-     * Return NFT id.
-     */
-    function getNftIdByEditionIdAndIssueId(uint32 _issue_id, uint32 _edition_id) internal pure returns (uint64) {
-        return (uint64(_issue_id)<<32)|uint64(_edition_id);
-    }
-
-    function getBoolFromUint64(uint8 position, uint64 data64) internal pure returns (bool flag) {
-        // (((1 << size) - 1) & base >> position)
-        assembly {
-            flag := and(1, shr(position, data64))
-        }
-    }
-
-    function getUint8FromUint64(uint8 position, uint64 data64) internal pure returns (uint8 data8) {
-        // (((1 << size) - 1) & base >> position)
-        assembly {
-            data8 := and(sub(shl(8, 1), 1), shr(position, data64))
-        }
-    }
-    function getUint16FromUint64(uint8 position, uint64 data64) internal pure returns (uint16 data16) {
-        // (((1 << size) - 1) & base >> position)
-        assembly {
-            data16 := and(sub(shl(16, 1), 1), shr(position, data64))
-        }
-    }
-    function getBottomUint32FromUint64(uint64 data64) internal pure returns (uint32 data32) {
-        // (((1 << size) - 1) & base >> position)
-        assembly {
-            data32 := and(sub(shl(32, 1), 1), data64)
-        }
-    }
-
-    function reWriteBoolInUint64(uint8 position, bool flag, uint64 data64) internal pure returns (uint64 boxed) {
-        assembly {
-            // mask = ~((1 << 8 - 1) << position)
-            // _box = (mask & _box) | ()data << position)
-            boxed := or( and(data64, not(shl(position, 1))), shl(position, flag))
-        }
-    }
-
-    
-    function reWriteUint8InUint64(uint8 position, uint8 flag, uint64 data64) internal pure returns (uint64 boxed) {
-        assembly {
-            // mask = ~((1 << 8 - 1) << position)
-            // _box = (mask & _box) | ()data << position)
-            boxed := or(and(data64, not(shl(position, 1))), shl(position, flag))
-        }
-    }
-
-    function reWriteUint16InUint64(uint8 position, uint16 data16, uint64 data64) internal pure returns (uint64 boxed) {
-        assembly {
-            // mask = ~((1 << 16 - 1) << position)
-            // _box = (mask & _box) | ()data << position)
-            boxed := or( and(data64, not(shl(position, sub(shl(16, 1), 1)))), shl(position, data16))
-        }
-    }
-
-    function uint256toUint64(uint256 value) internal pure returns (uint64) {
-        require(value <= type(uint64).max, "SparkLink: Value doesn't fit in 64 bits");
-        return uint64(value);
-    }
-
-    function uint256toUint128(uint256 value) internal pure returns (uint128) {
-        require(value <= type(uint128).max, "SparkLink: Value doesn't fit in 128 bits");
-        return uint128(value);
-    }
-    
-    function calculateFee(uint128 _amount, uint8 _fee_percent) internal pure returns (uint128) {
-        return _amount*_fee_percent/10**2;
-    }
-
-    function _toBase58String(bytes32 con) internal pure returns (string memory) {
-        
-        bytes memory source = bytes.concat(sha256MultiHash,con);
-
-        uint8[] memory digits = new uint8[](64); //TODO: figure out exactly how much is needed
-        digits[0] = 0;
-        uint8 digitlength = 1;
-        for (uint256 i = 0; i<source.length; ++i) {
-        uint carry = uint8(source[i]);
-        for (uint256 j = 0; j<digitlength; ++j) {
-            carry += uint(digits[j]) * 256;
-            digits[j] = uint8(carry % 58);
-            carry = carry / 58;
-        }
-        
-        while (carry > 0) {
-            digits[digitlength] = uint8(carry % 58);
-            digitlength++;
-            carry = carry / 58;
-        }
-        }
-        //return digits;
-        return string(toAlphabet(reverse(truncate(digits, digitlength))));
-    }
-
-    function toAlphabet(uint8[] memory indices) internal pure returns (bytes memory) {
-        bytes memory output = new bytes(indices.length);
-        for (uint256 i = 0; i<indices.length; i++) {
-            output[i] = ALPHABET[indices[i]];
-        }
-        return output;
-    }
-    
-    function truncate(uint8[] memory array, uint8 length) internal pure returns (uint8[] memory) {
-        uint8[] memory output = new uint8[](length);
-        for (uint256 i = 0; i<length; i++) {
-            output[i] = array[i];
-        }
-        return output;
-    }
-  
-    function reverse(uint8[] memory input) internal pure returns (uint8[] memory) {
-        uint8[] memory output = new uint8[](input.length);
-        for (uint256 i = 0; i<input.length; i++) {
-            output[i] = input[input.length-1-i];
-        }
-        return output;
-    }
-}
\ No newline at end of file
diff --git a/contract/scripts/deploy.ts b/contract/scripts/deploy.ts
deleted file mode 100644
index b0b010f..0000000
--- a/contract/scripts/deploy.ts
+++ /dev/null
@@ -1,73 +0,0 @@
-// We require the Hardhat Runtime Environment explicitly here. This is optional
-// but useful for running the script in a standalone fashion through `node <script>`.
-//
-// When running the script with `npx hardhat run <script>` you'll find the Hardhat
-// Runtime Environment's members available in the global scope.
-import { ethers } from "hardhat";
-import { HardhatRuntimeEnvironment } from "hardhat/types";
-// import {}
-
-const hre = require("hardhat");
-async function main() {
-  // Hardhat always runs the compile task when running scripts with its command
-  // line interface.
-  //
-  // If this script is run directly using `node` you may want to call compile
-  // manually to make sure everything is compiled
-  // await hre.run('compile');
-  const network_name = String(hre.network.name);
-  console.log(network_name);
-  let swapRouterAddress: String;
-  let swapFactoryAddress: String;
-  let DAORouterAddress01: String;
-  let DAORouterAddress02: String;
-  const pancakeSwapFactory = "0xcA143Ce32Fe78f1f7019d7d551a6402fC5350c73";
-  const pancakeSwapRouter02 = "0x10ED43C718714eb63d5aA57B78B54704E256024E";
-  const quickSwapFactory = "0x5757371414417b8C6CAad45bAeF941aBc7d3Ab32";
-  const quickSwapRouter02 = "0xa5E0829CaCEd8fFDD4De3c43696c57F7D7A678ff";
-  const uniSwapFactory = "0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f";
-  const uniSwapRouter02 = "0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D";
-  const DAO_Router_01 = "0x5245841D384C48EA47F16da587b31D23e194cb4a";
-  const DAO_Router_02 = "0x63c8D73CedD89a42CbA911f890FDcA94648b7bAF";
-  DAORouterAddress01 = DAO_Router_01;
-  DAORouterAddress02 = DAO_Router_02;
-  if (network_name == "BSC")
-  {
-    swapRouterAddress = pancakeSwapRouter02;
-    swapFactoryAddress  = pancakeSwapFactory;
-  }
-  else if (network_name == "matic")
-  {
-    swapRouterAddress = quickSwapRouter02;
-    swapFactoryAddress = quickSwapFactory;
-  }
-  else if (network_name == "ETH")
-  {
-    swapRouterAddress = uniSwapRouter02;
-    swapFactoryAddress = uniSwapFactory;
-  }
-  else{
-    return;
-  }
-  const [deployer] = await ethers.getSigners();
-  console.log("Deploying contracts with the account:", deployer.address);
-  console.log("Account balance:", (await deployer.getBalance()).toString());
-  console.log("SwapRouterAddress: " + swapRouterAddress);
-  console.log("SwapFactoryAddress: " + swapFactoryAddress);
-  // We get the contract to deploy
-  const SparkLink = await ethers.getContractFactory("SparkLink");
-  const sparkLink = await SparkLink.deploy(DAORouterAddress01, DAORouterAddress02,swapRouterAddress, swapFactoryAddress);
-
-  await sparkLink.deployed();
-
-  console.log("SparkLink deployed to:", sparkLink.address);
-}
-// module.exports = main()
-// // We recommend this pattern to be able to use async/await everywhere
-// and properly handle errors.
-main()
-  .then(() => process.exit(0))
-  .catch((error) => {
-    console.error(error);
-    process.exit(1);
-  });
diff --git a/contract/test/helper.ts b/contract/test/helper.ts
deleted file mode 100644
index 010fe1a..0000000
--- a/contract/test/helper.ts
+++ /dev/null
@@ -1,87 +0,0 @@
-import { ethers } from "hardhat";
-import { BigNumber } from "@ethersproject/bignumber";
-import { SignerWithAddress } from "@nomiclabs/hardhat-ethers/signers";
-import { SparkLink } from "../artifacts/typechain/SparkLink";
-// import {}
-import spark_constant from "./spark_constant";
-import { Address } from "cluster";
-export default {
-  /*
-   * Returns Publish() event
-   */
-  async publish(
-    contract: SparkLink,
-    first_sell_price = BigNumber.from(100),
-    royalty_fee = 30,
-    shill_times = 10,
-    ipfs_hash = Buffer.from(spark_constant.default_hash_1._hash, 'hex'),
-    token_addr = ethers.constants.AddressZero,
-    is_free = false,
-    is_NC = false,
-    is_ND = false
-  ) {
-    await contract.publish(
-      first_sell_price,
-      royalty_fee,
-      shill_times,
-      ipfs_hash,
-      token_addr,
-      is_free,
-      is_NC,
-      is_ND
-    );
-    const publish_event = (await contract.queryFilter(contract.filters.Publish()))[0];
-    return publish_event;
-  },
-
-
-  // async publish_burn(
-  //   contract: SparkLink,
-  //   first_sell_price = BigNumber.from(100),
-  //   royalty_fee =30,
-  //   shill_times = 10,
-  //   ipfs_hash = Buffer.from(spark_constant.default_hash_1._hash, 'hex'),
-  //   token_addr = ethers.constants.AddressZero
-  // ) {
-  //   await contract.publish(
-  //     first_sell_price,
-  //     royalty_fee,
-  //     shill_times,
-  //     ipfs_hash,
-  //     token_addr
-  //   );
-  //   const publish_event = (await contract.queryFilter(contract.filters.Publish()))[0];
-  //   return publish_event;
-  // },
-  /*
-   * Returns Mint() event.
-   * will call publish() if nft_id is not given.
-   */
-  async accept_shill(contract: SparkLink, caller_account: SignerWithAddress, nft_id?: BigNumber, value?: BigNumber) {
-    if (!nft_id) {
-      nft_id = (await this.publish(contract)).args.rootNFTId;
-    }
-    if (!value) {
-      value = BigNumber.from(100);
-    }
-    await contract.connect(caller_account).acceptShill(nft_id, { value:  value})
-    const transfer_event = (await contract.queryFilter(contract.filters.Transfer(ethers.constants.AddressZero, caller_account.address, null)))[0];
-    return transfer_event;
-  },
-
-  async claim_profit(contract: SparkLink, caller_account: SignerWithAddress, NFT_id: BigNumber) {
-    await contract.connect(caller_account).claimProfit(NFT_id);
-    const claim_event = (await contract.queryFilter(contract.filters.Claim(NFT_id, await contract.ownerOf(NFT_id))))[0];
-    return claim_event;
-  },
-
-  async setURI(contract: SparkLink, caller_acount: SignerWithAddress, NFT_id:BigNumber, ipfs_hash: String) {
-    await contract.connect(caller_acount).setURI(NFT_id, Buffer.from(ipfs_hash, 'hex'));
-    const SetURI_event = (await contract.queryFilter(contract.filters.SetURI(NFT_id, null, null)))[0];
-    return SetURI_event;
-  },
-
-  // async addLiquidity(token_addr: Address, caller_account: SignerWithAddress, ) {
-
-  // }
-}
diff --git a/contract/test/spark_constant.ts b/contract/test/spark_constant.ts
deleted file mode 100644
index e4bd5c6..0000000
--- a/contract/test/spark_constant.ts
+++ /dev/null
@@ -1,186 +0,0 @@
-import { BigNumber } from "ethers";
-import { ethers } from "hardhat";
-import { SignerWithAddress } from "@nomiclabs/hardhat-ethers/signers";
-import { utils } from "ethers";
-const airpod_ctor_parameters = {
-    _name: "SparkLink",
-    _symbol: "SPL"
-};
-
-const testTokenMintAmount = utils.parseUnits('1000000000', 18).toString();
-const default_hash_1 = {
-    _hash: '4f0b018a3b003b7c99f97427f410cafe5707ba18d28b13cd8bfa59e08e110380',
-    _URI: "https://ipfs.io/ipfs/QmTfCejgo2wTwqnDJs8Lu1pCNeCrCDuE4GAwkna93zdd7d"
-};
-
-const hash_2 = {
-    _hash: '5084d4dfd5da02f60cc01eab0b41cd28af321597c469881d612df4adaa2b3815',
-    _URI: "https://ipfs.io/ipfs/QmTkxoV1ZciKyFciWDueJDXv8bWRfD5R1YmmeMF6QojL6x"
-};
-
-const hash_3 = {
-    _hash: '55b38a82d49f814f34409e141d237aef5aee996364cbba94bae0f1abdad85173',
-    _URI: "https://ipfs.io/ipfs/QmU7C9hnDYnThfpCvX28bdzZpX8Dtyt8m7J6cUNfmBoN6E"
-};
-
-const valid_publish_parameters = { 
-    _first_sell_price: BigNumber.from(10000000000),
-    _royalty_fee: 30,
-    _shill_times: 10,
-    ipfs_hash: Buffer.from('4f0b018a3b003b7c99f97427f410cafe5707ba18d28b13cd8bfa59e08e110380', 'hex'),
-    token_addr: ethers.constants.AddressZero,
-    is_free: false,
-    is_NC: false,
-    is_ND:false
-}
-const valid_publish_parameters_with_ND = { 
-    _first_sell_price: BigNumber.from(100),
-    _royalty_fee: 30,
-    _shill_times: 10,
-    ipfs_hash: Buffer.from('4f0b018a3b003b7c99f97427f410cafe5707ba18d28b13cd8bfa59e08e110380', 'hex'),
-    token_addr: ethers.constants.AddressZero,
-    is_free: false,
-    is_NC: false,
-    is_ND: true
-}
-const invalid_publish_royalty_fee = {
-    _first_sell_price: BigNumber.from(1000),
-    _royalty_fee: 111,
-    _shill_times: 12,
-    ipfs_hash: Buffer.from('4f0b018a3b003b7c99f97427f410cafe5707ba18d28b13cd8bfa59e08e110380', 'hex'),
-    token_addr: ethers.constants.AddressZero,
-    is_free: false,
-    is_NC: false,
-    is_ND:false
-}
-const invalid_publish_royalty_fee_overflow = {
-    _first_sell_price: BigNumber.from(1000),
-    _royalty_fee: 256,
-    _shill_times: 12,
-    ipfs_hash: Buffer.from('4f0b018a3b003b7c99f97427f410cafe5707ba18d28b13cd8bfa59e08e110380', 'hex'),
-    token_addr: ethers.constants.AddressZero,
-    is_free: false,
-    is_NC: false,
-    is_ND:false
-}
-const invalid_publish_shill_times_overflow = {
-    _first_sell_price: BigNumber.from(1000),
-    _royalty_fee: 11,
-    _shill_times: 65536,
-    ipfs_hash: Buffer.from('4f0b018a3b003b7c99f97427f410cafe5707ba18d28b13cd8bfa59e08e110380', 'hex'),
-    token_addr: ethers.constants.AddressZero,
-    is_free: false,
-    is_NC: false,
-    is_ND:false
-}
-const invalid_publish_price_overflow = {
-    _first_sell_price: BigNumber.from("0x1234567890123456789012345678901211234"),
-    _royalty_fee: 11,
-    _shill_times: 11,
-    ipfs_hash: Buffer.from('4f0b018a3b003b7c99f97427f410cafe5707ba18d28b13cd8bfa59e08e110380', 'hex'),
-    token_addr: ethers.constants.AddressZero,
-    is_free: false,
-    is_NC: false,
-    is_ND:false
-}
-const invalid_publish_ipfs_hash_overflow = {
-    _first_sell_price: BigNumber.from(1000),
-    _royalty_fee: 11,
-    _shill_times: 11,
-    ipfs_hash: Buffer.from('4f0b018a3b003b7c99f97427f410cafe5707ba18d28b13cd8bfa59e08e11038011', 'hex'),
-    token_addr: ethers.constants.AddressZero,
-    is_free: false,
-    is_NC: false,
-    is_ND:false
-}
-const publish_one_hundred_royalty_fee = {
-    _first_sell_price: BigNumber.from(100000000),
-    _royalty_fee: 100,
-    _shill_times: 12,
-    ipfs_hash: Buffer.from('4f0b018a3b003b7c99f97427f410cafe5707ba18d28b13cd8bfa59e08e110380', 'hex'),
-    token_addr: ethers.constants.AddressZero,
-    is_free: false,
-    is_NC: false,
-    is_ND:false
-}
-const publish_zero_royalty_fee = {
-    _first_sell_price: BigNumber.from(1000),
-    _royalty_fee: 0,
-    _shill_times: 12,
-    ipfs_hash: Buffer.from('4f0b018a3b003b7c99f97427f410cafe5707ba18d28b13cd8bfa59e08e110380', 'hex'),
-    token_addr: ethers.constants.AddressZero,
-    is_free: false,
-    is_NC: false,
-    is_ND:false
-}
-const publish_zero_first_sell_price = {
-    _first_sell_price: BigNumber.from(0),
-    _royalty_fee: 12,
-    _shill_times: 12,
-    ipfs_hash: Buffer.from('4f0b018a3b003b7c99f97427f410cafe5707ba18d28b13cd8bfa59e08e110380', 'hex'),
-    token_addr: ethers.constants.AddressZero,
-    is_free: false,
-    is_NC: false,
-    is_ND:false
-}
-const publish_zero_shill_times = {
-    _first_sell_price: BigNumber.from(1121),
-    _royalty_fee: 12,
-    _shill_times: 0,
-    ipfs_hash: Buffer.from('4f0b018a3b003b7c99f97427f410cafe5707ba18d28b13cd8bfa59e08e110380', 'hex'),
-    token_addr: ethers.constants.AddressZero,
-    is_free: false,
-    is_NC: false,
-    is_ND:false
-}
-const publish_one_shill_times = {
-    _first_sell_price: BigNumber.from(1121),
-    _royalty_fee: 12,
-    _shill_times: 1,
-    ipfs_hash: Buffer.from('4f0b018a3b003b7c99f97427f410cafe5707ba18d28b13cd8bfa59e08e110380', 'hex'),
-    token_addr: ethers.constants.AddressZero,
-    is_free: false,
-    is_NC: false,
-    is_ND:false
-}
-const nft_id_not_exist = BigNumber.from(114514);
-const edition_id_not_exist = BigNumber.from(114514);
-const issue_id_not_exist = BigNumber.from(114514);
-const overflow_price_value = BigNumber.from("0x1234567890123456789012345678901211234");
-const overflow_NFT_id_value = BigNumber.from("0x1234567890123456789012");
-const overflow_ipfs_hash_value = Buffer.from('4f0b018a3b003b7c99f97427f410cafe5707ba18d28b13cd8bfa59e08e11038011', 'hex');
-const label1 = "huluwahuluwa yiketengshangqigegua"
-const label2 = "葫芦娃葫芦娃，一颗藤上七个瓜"
-const label3 = "伞兵UP"
-const loss_ratio = 62;
-const DAO_fee = 2;
-export default {
-    airpod_ctor_parameters,
-    default_hash_1,
-    loss_ratio,
-    DAO_fee,
-    publish_one_hundred_royalty_fee,
-    publish_zero_royalty_fee,
-    invalid_publish_royalty_fee,
-    invalid_publish_royalty_fee_overflow,
-    invalid_publish_shill_times_overflow,
-    invalid_publish_ipfs_hash_overflow,
-    invalid_publish_price_overflow,
-    nft_id_not_exist,
-    edition_id_not_exist,
-    issue_id_not_exist,
-    overflow_price_value,
-    overflow_NFT_id_value,
-    overflow_ipfs_hash_value,
-    publish_zero_first_sell_price,
-    publish_zero_shill_times,
-    publish_one_shill_times,
-    hash_2,
-    hash_3,
-    label1,
-    label2,
-    label3,
-    testTokenMintAmount,
-    valid_publish_parameters,
-    valid_publish_parameters_with_ND
-};
\ No newline at end of file
diff --git a/contract/test/spark_link_test.ts b/contract/test/spark_link_test.ts
deleted file mode 100644
index 011f95e..0000000
--- a/contract/test/spark_link_test.ts
+++ /dev/null
@@ -1,1185 +0,0 @@
-import { use, expect } from "chai";
-import { solidity } from "ethereum-waffle";
-import { artifacts, ethers } from "hardhat";
-import { SparkLink } from "../artifacts/typechain/SparkLink";
-import { TestTokenA } from "../artifacts/typechain/TestTokenA";
-import { BurnToken } from "../artifacts/typechain/BurnToken";
-import { BigNumber } from "@ethersproject/bignumber";
-import { SignerWithAddress } from "@nomiclabs/hardhat-ethers/signers";
-import spark_constant from "./spark_constant";
-import helper from "./helper";
-import { utils } from "ethers";
-import exp from "constants";
-import jsonABI_UniswapV2Factory from "@uniswap/v2-core/build/UniswapV2Factory.json";
-import jsonABI_UniswapV2Router02 from "@uniswap/v2-periphery/build/UniswapV2Router02.json";
-import jsonABI_WETH9 from "@uniswap/v2-periphery/build/WETH9.json";
-import { connect } from "http2";
-import { Contract } from "hardhat/internal/hardhat-network/stack-traces/model";
-import { Address } from "cluster";
-use(solidity);
-
-describe("SparkLink", function () {
-  let SparkLink: SparkLink;
-  let owner: SignerWithAddress;
-  let caller: SignerWithAddress;
-  let aha : SignerWithAddress;
-  let accounts: SignerWithAddress[];
-  let UniswapV2FactoryInterface = new ethers.utils.Interface(jsonABI_UniswapV2Factory.abi);
-  let UniswapV2Factory;
-  let UniswapV2FactoryAddress:String;
-  let UniswapV2Router02Interface = new ethers.utils.Interface(jsonABI_UniswapV2Router02.abi);
-  let UniswapV2Router02;
-  let UniswapV2Router02Address:String;
-  let WETH9Interface = new ethers.utils.Interface(jsonABI_WETH9.abi);
-  let WETH9;
-
-  beforeEach(async () => {
-    accounts = await ethers.getSigners();
-    owner = accounts[0];
-    caller = accounts[19];
-    aha = accounts[18];
-    let UniswapV2FactoryFactory = new ethers.ContractFactory(UniswapV2FactoryInterface, jsonABI_UniswapV2Factory.evm.bytecode.object, owner);
-    let UniswapV2FactoryContract = await UniswapV2FactoryFactory.deploy(owner.address);
-    UniswapV2Factory = (await UniswapV2FactoryContract.deployed()).connect(owner);
-    let WETH9Factory = new ethers.ContractFactory(WETH9Interface, jsonABI_WETH9.evm.bytecode.object, owner);
-    let WETH9Contract = await WETH9Factory.deploy();
-    WETH9 = (await WETH9Contract.deployed()).connect(owner)
-    let UniswapV2Router02Factory = new ethers.ContractFactory(UniswapV2Router02Interface, jsonABI_UniswapV2Router02.evm.bytecode.object, owner);
-    let UniswapV2Router02Contract = await UniswapV2Router02Factory.deploy(UniswapV2Factory.address, WETH9.address);
-    let UniswapV2Router02 = (await UniswapV2Router02Contract.deployed()).connect(owner);
-    UniswapV2FactoryAddress = UniswapV2Factory.address;
-    UniswapV2Router02Address =  UniswapV2Router02.address;
-    const SparkLinkFactory = await ethers.getContractFactory("SparkLink");
-    SparkLink = (await SparkLinkFactory.deploy(caller.address, aha.address, UniswapV2Router02Address, UniswapV2FactoryAddress)) as SparkLink;
-    SparkLink = (await SparkLink.deployed()).connect(owner);
-  });
-
-  it('Should NFT name and symbol initialized properly in contract creator', async () => {
-    expect(await SparkLink.name()).to.equal(spark_constant.airpod_ctor_parameters._name);
-    expect(await SparkLink.symbol()).to.equal(spark_constant.airpod_ctor_parameters._symbol);
-  });
-
-  context('publish()', async () => {
-    it('Should publish reject invalid parameters', async () => {
-      // should revert with no valid royalty fee
-      { 
-        let invalid_parameter = spark_constant.invalid_publish_royalty_fee;
-        let error_info = "SparkLink: Royalty fee should be <= 100%.";
-        await expect(SparkLink.publish(
-          invalid_parameter._first_sell_price, 
-          invalid_parameter._royalty_fee, 
-          invalid_parameter._shill_times, 
-          invalid_parameter.ipfs_hash,
-          invalid_parameter.token_addr,
-          invalid_parameter.is_free,
-          invalid_parameter.is_NC,
-          invalid_parameter.is_ND
-        )).to.be.revertedWith(error_info);
-      }
-      // should revert with royalty fee overflow
-      {
-        let invalid_parameter = spark_constant.invalid_publish_royalty_fee_overflow;
-        await expect(SparkLink.publish(
-          invalid_parameter._first_sell_price, 
-          invalid_parameter._royalty_fee, 
-          invalid_parameter._shill_times, 
-          invalid_parameter.ipfs_hash,
-          invalid_parameter.token_addr,
-          invalid_parameter.is_free,
-          invalid_parameter.is_NC,
-          invalid_parameter.is_ND
-        )).to.be.reverted;
-      }
-      // should revert with shill times overflow      
-      {
-        let invalid_parameter = spark_constant.invalid_publish_shill_times_overflow;
-        await expect(SparkLink.publish(
-          invalid_parameter._first_sell_price, 
-          invalid_parameter._royalty_fee, 
-          invalid_parameter._shill_times, 
-          invalid_parameter.ipfs_hash,
-          invalid_parameter.token_addr,
-          invalid_parameter.is_free,
-          invalid_parameter.is_NC,
-          invalid_parameter.is_ND
-        )).to.be.reverted;
-      }
-      // should revert with first sell price overflow
-      {
-        let invalid_parameter = spark_constant.invalid_publish_price_overflow;
-        await expect(SparkLink.publish(
-          invalid_parameter._first_sell_price, 
-          invalid_parameter._royalty_fee, 
-          invalid_parameter._shill_times, 
-          invalid_parameter.ipfs_hash,
-          invalid_parameter.token_addr,
-          invalid_parameter.is_free,
-          invalid_parameter.is_NC,
-          invalid_parameter.is_ND
-        )).to.be.reverted;
-      }
-      // should revert with ipfs hash overflow
-      {
-        let invalid_parameter = spark_constant.invalid_publish_ipfs_hash_overflow;
-        await expect(SparkLink.publish(
-          invalid_parameter._first_sell_price, 
-          invalid_parameter._royalty_fee, 
-          invalid_parameter._shill_times, 
-          invalid_parameter.ipfs_hash,
-          invalid_parameter.token_addr,
-          invalid_parameter.is_free,
-          invalid_parameter.is_NC,
-          invalid_parameter.is_ND
-        )).to.be.reverted;
-      }
-    });
-
-    it('should publish an issue and emit event successfully', async () => {
-      const event = await helper.publish(SparkLink)
-
-      expect(event.args.publisher).to.hexEqual(owner.address);
-      let root_nft_id = BigNumber.from("0x100000000").add(1);
-      expect(event.args.rootNFTId).to.eq(BigNumber.from(root_nft_id));
-      expect(await SparkLink.tokenURI(root_nft_id)).to.eq(spark_constant.default_hash_1._URI);
-      expect(await SparkLink.getShillTimesByNFTId(root_nft_id)).to.eq(10);
-      expect(await SparkLink.getShillPriceByNFTId(root_nft_id)).to.eq(BigNumber.from(100));
-      expect(await SparkLink.getTotalAmountByNFTId(root_nft_id)).to.eq(1);
-      expect(await SparkLink.getRemainShillTimesByNFTId(root_nft_id)).to.eq(10);
-    });    
-
-    it('should publish an issue and emit event successfully with test token', async () => {
-      const TestTokenA = await ethers.getContractFactory('TestTokenA');
-      const testTokenA = await TestTokenA.deploy(spark_constant.testTokenMintAmount);
-      let testTokenAContract = await testTokenA.deployed();
-      let test_token_parameter = spark_constant.valid_publish_parameters;
-      test_token_parameter.token_addr = testTokenAContract.address;
-      const event = await helper.publish(
-        SparkLink,
-        test_token_parameter._first_sell_price,
-        test_token_parameter._royalty_fee,
-        test_token_parameter._shill_times,
-        test_token_parameter.ipfs_hash,
-        testTokenAContract.address
-        );
-      expect(event.args.publisher).to.hexEqual(owner.address);
-      let root_nft_id = BigNumber.from("0x100000000").add(1);
-      expect(event.args.rootNFTId).to.eq(BigNumber.from(root_nft_id));
-      expect(await SparkLink.tokenURI(root_nft_id)).to.eq(spark_constant.default_hash_1._URI);
-      expect(await SparkLink.getShillTimesByNFTId(root_nft_id)).to.eq(10);
-      expect(await SparkLink.getShillPriceByNFTId(root_nft_id)).to.eq(test_token_parameter._first_sell_price);
-      expect(await SparkLink.getTotalAmountByNFTId(root_nft_id)).to.eq(1);
-      expect(await SparkLink.getRemainShillTimesByNFTId(root_nft_id)).to.eq(10);
-    });
-
-    it('should publish an issue and emit event successfully with burn token', async () => {
-      const BurnToken = await ethers.getContractFactory('BurnToken');
-      const burnToken = await BurnToken.deploy(spark_constant.testTokenMintAmount);
-      let BurnTokenContract = await burnToken.deployed();
-      let test_token_parameter = spark_constant.valid_publish_parameters;
-      test_token_parameter.token_addr = BurnTokenContract.address;
-      const event = await helper.publish(
-        SparkLink,
-        test_token_parameter._first_sell_price,
-        test_token_parameter._royalty_fee,
-        test_token_parameter._shill_times,
-        test_token_parameter.ipfs_hash,
-        BurnTokenContract.address
-        );
-      expect(event.args.publisher).to.hexEqual(owner.address);
-      let root_nft_id = BigNumber.from("0x100000000").add(1);
-      expect(event.args.rootNFTId).to.eq(BigNumber.from(root_nft_id));
-      expect(await SparkLink.tokenURI(root_nft_id)).to.eq(spark_constant.default_hash_1._URI);
-      expect(await SparkLink.getShillTimesByNFTId(root_nft_id)).to.eq(10);
-      expect(await SparkLink.getShillPriceByNFTId(root_nft_id)).to.eq(test_token_parameter._first_sell_price);
-      expect(await SparkLink.getTotalAmountByNFTId(root_nft_id)).to.eq(1);
-      expect(await SparkLink.getRemainShillTimesByNFTId(root_nft_id)).to.eq(10);
-    });
-
-    it('should work when shill times is zero', async (): Promise<void> => {
-      const other = accounts[1];
-      const special_parameters = spark_constant.publish_zero_shill_times;
-      const publish_event = await helper.publish(
-          SparkLink, special_parameters._first_sell_price, special_parameters._royalty_fee ,special_parameters._shill_times , special_parameters.ipfs_hash);
-      const transfer_event = (await SparkLink.queryFilter(SparkLink.filters.Transfer(ethers.constants.AddressZero, owner.address, null)))[0];
-      expect(transfer_event.args.from).to.eq(ethers.constants.AddressZero);
-      expect(transfer_event.args.to).to.eq(owner.address);
-    });
-
-});
-
-  context('acceptShill()', async () => {
-    it('Should acceptShill reject invalid parameters', async () => {
-        let other = accounts[1];
-        let error_info = "SparkLink: This NFT does not exist";
-        let invalid_parameter = spark_constant.nft_id_not_exist;
-        await expect(SparkLink.connect(other).acceptShill(invalid_parameter)
-        ).to.be.revertedWith(error_info);
-    });
-
-    it('Should acceptShill reject not enough ETH', async () => {
-        let other = accounts[1];
-        const publish_event = await helper.publish(SparkLink);
-        let error_info = "SparkLink: Wrong price";
-        const root_nft_id = publish_event.args.rootNFTId;
-        await expect(
-          SparkLink.connect(other).acceptShill(root_nft_id, {value: 0})
-        ).to.be.revertedWith(error_info);
-    });
-
-    it('Should acceptShill reject no remain shill times', async () => {
-        let other = accounts[1];
-        let loop_times = 10;
-        const publish_event = await helper.publish(SparkLink);
-        let error_info = "SparkLink: There is no remaining shill time for this NFT";
-        const root_nft_id = publish_event.args.rootNFTId;
-        for (let i = 0; i < loop_times; i += 1) {
-          await helper.accept_shill(SparkLink, other, root_nft_id);
-        }
-        await expect(
-          SparkLink.connect(other).acceptShill(root_nft_id, {value: 100})
-        ).to.be.revertedWith(error_info);
-    });
-
-    it('should mint a NFT from an issue', async (): Promise<void> => {
-      const other = accounts[1];
-      const first_sell_price = BigNumber.from(100);
-      const publish_event = await helper.publish(SparkLink, first_sell_price)
-      const root_nft_id = publish_event.args.rootNFTId;
-      const contract_balance_before_acceptShill = await ethers.provider.getBalance(SparkLink.address);
-      const transfer_event = await helper.accept_shill(SparkLink, other, root_nft_id);
-      const contract_balance_after_acceptShill = await ethers.provider.getBalance(SparkLink.address);
-      expect(contract_balance_after_acceptShill.sub(contract_balance_before_acceptShill)).to.eq(await SparkLink.getShillPriceByNFTId(root_nft_id));
-      expect(transfer_event.args.to).to.eq(other.address);
-      const new_NFT_id = transfer_event.args.tokenId;
-      expect(await SparkLink.getRemainShillTimesByNFTId(root_nft_id)).to.eq(9);
-      expect(await SparkLink.getProfitByNFTId(root_nft_id)).to.eq(100*(100-spark_constant.DAO_fee)/100);
-      expect(await SparkLink.getRemainShillTimesByNFTId(new_NFT_id)).to.eq(10);
-      expect(await SparkLink.getFatherByNFTId(new_NFT_id)).to.eq(root_nft_id);
-      expect(await SparkLink.getShillPriceByNFTId(new_NFT_id)).to.eq(first_sell_price.mul(spark_constant.loss_ratio).div(100));
-      expect(await SparkLink.ownerOf(new_NFT_id)).to.eq(other.address);
-      expect(await SparkLink.balanceOf(other.address)).to.eq(1);
-      expect(await SparkLink.tokenURI(new_NFT_id)).to.eq(await SparkLink.tokenURI(root_nft_id));
-      const father_id = await SparkLink.getFatherByNFTId(transfer_event.args.tokenId);
-      expect(father_id).to.eq(root_nft_id)
-    });
-    
-    it('should mint an owner NFT after remain_shill_times decrease to 0', async (): Promise<void> => {
-      const other = accounts[1];
-      const shill_price = BigNumber.from(100);
-      const publish_event = await helper.publish(SparkLink, shill_price);
-      const root_nft_id = publish_event.args.rootNFTId;
-      const shill_times = await SparkLink.getShillTimesByNFTId(root_nft_id);
-      for (let i = 1; i < shill_times; i +=1) {
-        await helper.accept_shill(SparkLink, other, root_nft_id, shill_price);
-      }
-      await SparkLink.connect(other).acceptShill(root_nft_id, { value: BigNumber.from(100) })
-      const transfer_event = (await SparkLink.queryFilter(SparkLink.filters.Transfer(ethers.constants.AddressZero, owner.address, null)))[0];
-      expect(transfer_event.args.from).to.eq(ethers.constants.AddressZero);
-      expect(transfer_event.args.to).to.eq(owner.address);
-    });
-
-    it('should work when first sell price is zero', async (): Promise<void> => {
-      const other = accounts[1];
-      const special_parameters = spark_constant.publish_zero_first_sell_price;
-      const publish_event = await helper.publish(
-          SparkLink, special_parameters._first_sell_price, special_parameters._royalty_fee ,special_parameters._shill_times , special_parameters.ipfs_hash);
-      const root_nft_id = publish_event.args.rootNFTId;
-      const shill_price = await SparkLink.getShillPriceByNFTId(root_nft_id);
-      const shill_times = await SparkLink.getShillTimesByNFTId(root_nft_id);
-      for (let i = 1; i < shill_times; i +=1) {
-        await helper.accept_shill(SparkLink, other, root_nft_id, shill_price);
-      }
-      await SparkLink.connect(other).acceptShill(root_nft_id, { value: 0 })
-      const transfer_event = (await SparkLink.queryFilter(SparkLink.filters.Transfer(ethers.constants.AddressZero, owner.address, null)))[0];
-      expect(transfer_event.args.from).to.eq(ethers.constants.AddressZero);
-      expect(transfer_event.args.to).to.eq(owner.address);
-    });    
-    
-    it('should work when royalty fee is zero', async (): Promise<void> => {
-      const other = accounts[1];
-      const special_parameters = spark_constant.publish_zero_royalty_fee;
-      const publish_event = await helper.publish(
-          SparkLink, special_parameters._first_sell_price, special_parameters._royalty_fee ,special_parameters._shill_times , special_parameters.ipfs_hash);
-      const root_nft_id = publish_event.args.rootNFTId;
-      const shill_price = await SparkLink.getShillPriceByNFTId(root_nft_id);
-      const shill_times = await SparkLink.getShillTimesByNFTId(root_nft_id);
-      for (let i = 1; i < shill_times; i +=1) {
-        await helper.accept_shill(SparkLink, other, root_nft_id, shill_price);
-      }
-      await SparkLink.connect(other).acceptShill(root_nft_id, { value: shill_price })
-      const transfer_event = (await SparkLink.queryFilter(SparkLink.filters.Transfer(ethers.constants.AddressZero, owner.address, null)))[0];
-      expect(transfer_event.args.from).to.eq(ethers.constants.AddressZero);
-      expect(transfer_event.args.to).to.eq(owner.address);
-    });    
-    
-    it('should work when shill times is one', async (): Promise<void> => {
-      const other = accounts[1];
-      const special_parameters = spark_constant.publish_one_shill_times;
-      const publish_event = await helper.publish(
-          SparkLink, special_parameters._first_sell_price, special_parameters._royalty_fee ,special_parameters._shill_times , special_parameters.ipfs_hash);
-      const root_nft_id = publish_event.args.rootNFTId;
-      const shill_price = await SparkLink.getShillPriceByNFTId(root_nft_id);
-      const shill_times = await SparkLink.getShillTimesByNFTId(root_nft_id);
-      await SparkLink.connect(other).acceptShill(root_nft_id, { value: shill_price })
-      const transfer_event = (await SparkLink.queryFilter(SparkLink.filters.Transfer(ethers.constants.AddressZero, owner.address, null)))[0];
-      expect(transfer_event.args.from).to.eq(ethers.constants.AddressZero);
-      expect(transfer_event.args.to).to.eq(owner.address);
-    }); 
-
-    it('should shill_price decrease by loss ratio', async (): Promise<void> => {
-      const loop_times = 17;
-      const other = accounts[2];
-      const base_account_index = 3;
-      let shill_price = BigNumber.from(1000000);
-      const publish_event = await helper.publish(SparkLink, shill_price);
-      const root_nft_id = publish_event.args.rootNFTId;
-      let royalty_fee = await SparkLink.getRoyaltyFeeByNFTId(root_nft_id);
-      let DAO_fee = spark_constant.DAO_fee;
-      let sub_DAO_fee = 100 - DAO_fee;
-      let sub_royalty_fee = (BigNumber.from(100)).sub(royalty_fee);
-      let father_nft_id = root_nft_id;
-      let new_nft_id = (await helper.accept_shill(SparkLink, other, root_nft_id, shill_price)).args.tokenId;
-      expect(await SparkLink.getProfitByNFTId(father_nft_id)).to.eq(shill_price.mul(100-DAO_fee).div(100));
-      shill_price = shill_price.mul(spark_constant.loss_ratio).div(100);
-      for (let i = 0; i < loop_times; i += 1) {
-        father_nft_id = new_nft_id;
-        new_nft_id = (await helper.accept_shill(SparkLink, accounts[base_account_index+i], new_nft_id, shill_price)).args.tokenId;
-        expect((await SparkLink.getProfitByNFTId(father_nft_id))).to.eq(BigNumber.from(Math.ceil(Math.ceil(Number(shill_price)*sub_DAO_fee/100)*Number(sub_royalty_fee)/100)));
-        shill_price = shill_price.mul(spark_constant.loss_ratio).div(100);
-      }
-    });
-    it('should shill_price decrease by loss ratio with test token', async (): Promise<void> => {
-      const TestTokenA = await ethers.getContractFactory('TestTokenA');
-      const testTokenA = await TestTokenA.deploy(spark_constant.testTokenMintAmount);
-      let testTokenAContract = await testTokenA.deployed();
-      let test_token_parameter = spark_constant.valid_publish_parameters;
-      test_token_parameter.token_addr = testTokenAContract.address;
-      const publish_event = await helper.publish(
-        SparkLink,
-        test_token_parameter._first_sell_price,
-        test_token_parameter._royalty_fee,
-        test_token_parameter._shill_times,
-        test_token_parameter.ipfs_hash,
-        testTokenAContract.address
-      );
-      const loop_times = 17;
-      const other = accounts[2];
-      const base_account_index = 3;
-      let shill_price = test_token_parameter._first_sell_price;
-      const root_nft_id = publish_event.args.rootNFTId;
-      let royalty_fee = await SparkLink.getRoyaltyFeeByNFTId(root_nft_id);
-      let sub_royalty_fee = (BigNumber.from(100)).sub(royalty_fee);
-      let DAO_fee = spark_constant.DAO_fee;
-      let sub_DAO_fee = 100-DAO_fee;
-      let father_nft_id = root_nft_id;
-      await testTokenAContract.connect(owner).approve(owner.address, spark_constant.testTokenMintAmount);
-      await testTokenAContract.connect(owner).transferFrom(owner.address, other.address,shill_price);
-      await testTokenAContract.connect(other).approve(SparkLink.address, shill_price);
-      let new_nft_id = (await helper.accept_shill(SparkLink, other, root_nft_id, shill_price)).args.tokenId;
-      expect(await SparkLink.getProfitByNFTId(father_nft_id)).to.eq(shill_price.sub(shill_price.mul(DAO_fee).div(100)));
-      shill_price = shill_price.mul(spark_constant.loss_ratio).div(100);
-      for (let i = 0; i < loop_times; i += 1) {
-        father_nft_id = new_nft_id;
-        await testTokenAContract.connect(owner).transferFrom(owner.address, accounts[base_account_index+i].address,shill_price);
-        await testTokenAContract.connect(accounts[base_account_index+i]).approve(SparkLink.address, shill_price);
-        new_nft_id = (await helper.accept_shill(SparkLink, accounts[base_account_index+i], new_nft_id, shill_price)).args.tokenId;
-        expect((await SparkLink.getProfitByNFTId(father_nft_id))).to.eq(BigNumber.from(Math.ceil(Math.ceil(Number(shill_price)*sub_DAO_fee/100)*Number(sub_royalty_fee)/100)));
-        shill_price = shill_price.mul(spark_constant.loss_ratio).div(100);
-      }
-    });
-    it('should shill_price decrease by loss ratio with burn token', async (): Promise<void> => {
-      const BurnToken = await ethers.getContractFactory('BurnToken');
-      const burnToken = await BurnToken.deploy(spark_constant.testTokenMintAmount);
-      let BurnTokenContract = await burnToken.deployed();
-      let test_token_parameter = spark_constant.valid_publish_parameters;
-      test_token_parameter.token_addr = BurnTokenContract.address;
-      const publish_event = await helper.publish(
-        SparkLink,
-        test_token_parameter._first_sell_price,
-        test_token_parameter._royalty_fee,
-        test_token_parameter._shill_times,
-        test_token_parameter.ipfs_hash,
-        BurnTokenContract.address
-        );
-      const loop_times = 17;
-      const other = accounts[2];
-      const base_account_index = 3;
-      let shill_price = test_token_parameter._first_sell_price;
-      const root_nft_id = publish_event.args.rootNFTId;
-      let royalty_fee = await SparkLink.getRoyaltyFeeByNFTId(root_nft_id);
-      let sub_royalty_fee = (BigNumber.from(100)).sub(royalty_fee);
-      let DAO_fee = spark_constant.DAO_fee;
-      let father_nft_id = root_nft_id;
-      await BurnTokenContract.connect(owner).transfer( other.address,shill_price.mul(2));
-      await BurnTokenContract.connect(other).approve(SparkLink.address, shill_price);
-      let new_nft_id = (await helper.accept_shill(SparkLink, other, root_nft_id, shill_price)).args.tokenId;
-      expect(await SparkLink.getProfitByNFTId(father_nft_id)).to.eq(shill_price.div(2).sub(shill_price.div(2).mul(DAO_fee).div(100)));
-      shill_price = shill_price.mul(spark_constant.loss_ratio).div(100);
-      for (let i = 0; i < loop_times; i += 1) {
-        father_nft_id = new_nft_id;
-        await BurnTokenContract.connect(owner).transfer(accounts[base_account_index+i].address,shill_price.mul(2));
-        await BurnTokenContract.connect(accounts[base_account_index+i]).approve(SparkLink.address, shill_price);
-        new_nft_id = (await helper.accept_shill(SparkLink, accounts[base_account_index+i], new_nft_id, shill_price)).args.tokenId;
-        expect((await SparkLink.getProfitByNFTId(father_nft_id))).to.eq(BigNumber.from(Math.ceil(Number(shill_price.div(2).sub(shill_price.div(2).mul(DAO_fee).div(100)))*Number(sub_royalty_fee)/100)));
-        shill_price = shill_price.mul(spark_constant.loss_ratio).div(100);
-      }
-    });
-  });
-  context('claimProfit()', async () => {
-    it('Should claimProfit reject none exist Edition', async () => {
-      {
-        let other = accounts[1];
-        let error_info = "SparkLink: This edition does not exist";
-        let invalid_parameter = spark_constant.nft_id_not_exist;
-        await expect(SparkLink.connect(other).claimProfit(invalid_parameter)
-        ).to.be.revertedWith(error_info);
-      }
-    });
-
-    it('should emit Claim event', async (): Promise<void> => {
-      const other = accounts[1];
-      const caller = accounts[2];
-      const first_sell_price = BigNumber.from(100);
-      const publish_event = await helper.publish(SparkLink, first_sell_price)
-      const root_nft_id = publish_event.args.rootNFTId;
-      await helper.accept_shill(SparkLink, other, root_nft_id);
-      const claim_event = await helper.claim_profit(SparkLink, caller, root_nft_id);
-      expect(claim_event.args.NFT_id).to.eq(root_nft_id);
-      expect(claim_event.args.receiver).to.eq(owner.address);
-      let shillPrice = await SparkLink.getShillPriceByNFTId(root_nft_id)
-      expect(claim_event.args.amount).to.eq(shillPrice.sub(shillPrice.mul(spark_constant.DAO_fee).div(100)));
-    });
-
-    it("should transfer ETH from contract balance to owner balance", async (): Promise<void> => {
-      const other = accounts[1];
-      const caller = accounts[2];
-      const first_sell_price = BigNumber.from(100);
-      const publish_event = await helper.publish(SparkLink, first_sell_price)
-      const root_nft_id = publish_event.args.rootNFTId;
-      await helper.accept_shill(SparkLink, other, root_nft_id);
-      const contract_balance_before_claimProfit = await ethers.provider.getBalance(SparkLink.address);
-      const owner_balance_before_claimProfit = await ethers.provider.getBalance(owner.address);
-      await helper.claim_profit(SparkLink, caller, root_nft_id);
-      const contract_balance_after_claimProfit = await ethers.provider.getBalance(SparkLink.address);
-      const owner_balance_after_claimProfit = await ethers.provider.getBalance(owner.address);
-      expect(contract_balance_before_claimProfit.sub(contract_balance_after_claimProfit)).
-        to.eq(await SparkLink.getShillPriceByNFTId(root_nft_id));
-      expect(owner_balance_after_claimProfit.sub(owner_balance_before_claimProfit)).
-        to.eq(first_sell_price.sub(first_sell_price.mul(spark_constant.DAO_fee).div(100)));
-    });
-
-    it("should transfer test token A from contract balance to owner balance", async (): Promise<void> => {
-      const TestTokenA = await ethers.getContractFactory('TestTokenA');
-      const testTokenA = await TestTokenA.deploy(spark_constant.testTokenMintAmount);
-      let testTokenAContract = await testTokenA.deployed();
-      let test_token_parameter = spark_constant.valid_publish_parameters;
-      test_token_parameter.token_addr = testTokenAContract.address;
-      const publish_event = await helper.publish(
-        SparkLink,
-        test_token_parameter._first_sell_price,
-        test_token_parameter._royalty_fee,
-        test_token_parameter._shill_times,
-        test_token_parameter.ipfs_hash,
-        testTokenAContract.address
-        );
-      const other = accounts[1];
-      const shill_price = spark_constant.valid_publish_parameters._first_sell_price;
-      await testTokenAContract.connect(owner).approve(owner.address, spark_constant.testTokenMintAmount);
-      await testTokenAContract.connect(owner).transferFrom(owner.address, other.address,shill_price);
-      await testTokenAContract.connect(other).approve(SparkLink.address, shill_price);
-      const root_nft_id = publish_event.args.rootNFTId;
-      await helper.accept_shill(SparkLink, other, root_nft_id);
-      const contract_balance_before_claimProfit = await testTokenAContract.balanceOf(SparkLink.address);
-      const owner_balance_before_claimProfit = await testTokenAContract.balanceOf(owner.address);
-      await helper.claim_profit(SparkLink, caller, root_nft_id);
-      const contract_balance_after_claimProfit = await testTokenAContract.balanceOf(SparkLink.address);
-      const owner_balance_after_claimProfit = await testTokenAContract.balanceOf(owner.address);
-      expect(contract_balance_before_claimProfit.sub(contract_balance_after_claimProfit)).
-        to.eq(shill_price);
-      expect(owner_balance_after_claimProfit.sub(owner_balance_before_claimProfit)).
-        to.eq(shill_price.sub(shill_price.mul(spark_constant.DAO_fee).div(100)));
-    });
-
-    it("should profit spread from the bottom to the top", async (): Promise<void> => {
-      const loop_times = 17;
-      const base_account_index = 2;
-      let shill_prices:BigNumber[] = new Array;
-      let nft_ids:BigNumber[] = new Array;
-      let profits:BigNumber[] = new Array(loop_times+1);
-      let claim_increases:BigNumber[] = new Array(loop_times+1);
-      shill_prices.push(BigNumber.from(10000000));
-      const publish_event = await helper.publish(SparkLink, shill_prices[0]);
-      // length is loop_times+1
-      nft_ids.push(publish_event.args.rootNFTId);
-      let royalty_fee = await SparkLink.getRoyaltyFeeByNFTId(publish_event.args.rootNFTId);
-      let DAO_fee = spark_constant.DAO_fee;
-      for (let i = 0; i < loop_times; i += 1){
-        nft_ids.push((await helper.accept_shill(SparkLink, accounts[base_account_index+i], nft_ids[i], shill_prices[i])).args.tokenId);
-        shill_prices.push(shill_prices[i].mul(spark_constant.loss_ratio).div(100));
-      }
-      profits[loop_times] = BigNumber.from(0);
-      claim_increases[loop_times] = BigNumber.from(0);
-      profits[loop_times-1] = (await SparkLink.getShillPriceByNFTId(nft_ids[loop_times-1]));
-      profits[loop_times-1] = profits[loop_times-1].sub(profits[loop_times-1].mul(DAO_fee).div(100));
-      claim_increases[loop_times-1] = profits[loop_times-1].sub(profits[loop_times-1].mul(royalty_fee).div(100))
-      for (let i = loop_times-2; i >= 0; i -= 1){
-        profits[i] = profits[i+1].mul(royalty_fee).div(100).add(await SparkLink.getShillPriceByNFTId(nft_ids[i]));
-        profits[i] = profits[i].sub(profits[i].mul(DAO_fee).div(100));
-        claim_increases[i] = profits[i].sub(profits[i].mul(royalty_fee).div(100));
-      }
-      for (let i = loop_times-1; i >= 1; i -= 1) {
-        shill_prices[i] = shill_prices[i].sub(shill_prices[i].mul(DAO_fee).div(100));
-      }
-      for (let i = loop_times-1; i >= 1; i -= 1) {
-       expect(shill_prices[i].sub(shill_prices[i].mul(royalty_fee).div(100))).to.eq(await SparkLink.getProfitByNFTId(nft_ids[i]));
-      }
-      for (let i = 0; i < loop_times; i += 1) {
-        expect(await SparkLink.getEditionIdByNFTId(nft_ids[i])).to.eq(i+1);
-      }
-      claim_increases[0] = profits[0];
-      for (let i = loop_times-1; i >= 0; i -= 1) {
-        let before_balance = await ethers.provider.getBalance(await SparkLink.ownerOf(nft_ids[i]));
-        let claim_event = await helper.claim_profit(SparkLink, caller, nft_ids[i]);
-        let amount = claim_event.args.amount;
-        let after_balance = await ethers.provider.getBalance(await SparkLink.ownerOf(nft_ids[i]));
-        expect(amount).to.eq(after_balance.sub(before_balance));
-        expect(claim_increases[i]).to.eq(amount);
-      }
-    }) 
-    
-    it("should profit spread from the bottom to the top with test token A", async (): Promise<void> => {
-      const TestTokenA = await ethers.getContractFactory('TestTokenA');
-      const testTokenA = await TestTokenA.deploy(spark_constant.testTokenMintAmount);
-      let testTokenAContract = await testTokenA.deployed();
-      let test_token_parameter = spark_constant.valid_publish_parameters;
-      test_token_parameter.token_addr = testTokenAContract.address;
-      const loop_times = 17;
-      const caller = accounts[1];
-      const base_account_index = 2;
-      let shill_prices:BigNumber[] = new Array;
-      let nft_ids:BigNumber[] = new Array;
-      let profits:BigNumber[] = new Array(loop_times+1);
-      let claim_increases:BigNumber[] = new Array(loop_times+1);
-      shill_prices.push(spark_constant.valid_publish_parameters._first_sell_price);
-      const publish_event = await helper.publish(
-        SparkLink,
-        shill_prices[0],
-        test_token_parameter._royalty_fee,
-        test_token_parameter._shill_times,
-        test_token_parameter.ipfs_hash,
-        testTokenAContract.address
-        );
-      // length is loop_times+1
-      nft_ids.push(publish_event.args.rootNFTId);
-      let royalty_fee = await SparkLink.getRoyaltyFeeByNFTId(publish_event.args.rootNFTId);
-      let DAO_fee = spark_constant.DAO_fee;
-      for (let i = 0; i < loop_times; i += 1){
-        await testTokenAContract.connect(owner).transfer(accounts[base_account_index+i].address, shill_prices[i]);
-        await testTokenAContract.connect(accounts[base_account_index+i]).approve(SparkLink.address, shill_prices[i]);
-        nft_ids.push((await helper.accept_shill(SparkLink, accounts[base_account_index+i], nft_ids[i], shill_prices[i])).args.tokenId);
-        shill_prices.push(shill_prices[i].mul(spark_constant.loss_ratio).div(100));
-      }
-      profits[loop_times] = BigNumber.from(0);
-      claim_increases[loop_times] = BigNumber.from(0);
-      profits[loop_times-1] = (await SparkLink.getShillPriceByNFTId(nft_ids[loop_times-1]));
-      profits[loop_times-1] = profits[loop_times-1].sub(profits[loop_times-1].mul(DAO_fee).div(100));
-      claim_increases[loop_times-1] = profits[loop_times-1].sub(profits[loop_times-1].mul(royalty_fee).div(100))
-      for (let i = loop_times-2; i >= 0; i -= 1){
-        profits[i] = profits[i+1].mul(royalty_fee).div(100).add(await SparkLink.getShillPriceByNFTId(nft_ids[i]));
-        profits[i] = profits[i].sub(profits[i].mul(DAO_fee).div(100));
-        claim_increases[i] = profits[i].sub(profits[i].mul(royalty_fee).div(100));
-      }
-      for (let i = loop_times-1; i >= 1; i -= 1) {
-        shill_prices[i] = shill_prices[i].sub(shill_prices[i].mul(DAO_fee).div(100));
-      }
-      for (let i = loop_times-1; i >= 1; i -= 1) {
-       expect(shill_prices[i].sub(shill_prices[i].mul(royalty_fee).div(100))).to.eq(await SparkLink.getProfitByNFTId(nft_ids[i]));
-      }
-      for (let i = 0; i < loop_times; i += 1) {
-        expect(await SparkLink.getEditionIdByNFTId(nft_ids[i])).to.eq(i+1);
-      }
-      claim_increases[0] = profits[0];
-      for (let i = loop_times-1; i >= 0; i -= 1) {
-        let before_balance = await await testTokenAContract.balanceOf(await SparkLink.ownerOf(nft_ids[i]));
-        let claim_event = await helper.claim_profit(SparkLink, caller, nft_ids[i]);
-        let amount = claim_event.args.amount;
-        let after_balance = await testTokenAContract.balanceOf(await SparkLink.ownerOf(nft_ids[i]));
-        expect(amount).to.eq(after_balance.sub(before_balance));
-        expect(claim_increases[i]).to.eq(amount);
-      }
-    }) 
-
-    it("should profit spread from the bottom to the top when royalty fee is 100", async (): Promise<void> => {
-      const loop_times = 17;
-      const caller = accounts[1];
-      const base_account_index = 2;
-      let shill_prices:BigNumber[] = new Array;
-      let nft_ids:BigNumber[] = new Array;
-      let profits:BigNumber[] = new Array(loop_times+1);
-      let claim_increases:BigNumber[] = new Array(loop_times+1);
-      let special_parameters = spark_constant.publish_one_hundred_royalty_fee; 
-      const publish_event = await helper.publish(
-        SparkLink, special_parameters._first_sell_price, special_parameters._royalty_fee ,special_parameters._shill_times , special_parameters.ipfs_hash);
-      // length is loop_times+1
-      nft_ids.push(publish_event.args.rootNFTId);
-      let first_sell_price = await SparkLink.getShillPriceByNFTId(publish_event.args.rootNFTId);
-      shill_prices.push(first_sell_price);
-      let royalty_fee = await SparkLink.getRoyaltyFeeByNFTId(publish_event.args.rootNFTId);
-      let DAO_fee = spark_constant.DAO_fee;
-      for (let i = 0; i < loop_times; i += 1){
-        nft_ids.push((await helper.accept_shill(SparkLink, accounts[base_account_index+i], nft_ids[i], shill_prices[i])).args.tokenId);
-        shill_prices.push(shill_prices[i].mul(spark_constant.loss_ratio).div(100));
-      }
-      profits[loop_times] = BigNumber.from(0);
-      claim_increases[loop_times] = BigNumber.from(0);
-      profits[loop_times-1] = (await SparkLink.getShillPriceByNFTId(nft_ids[loop_times-1]));
-      profits[loop_times-1] = profits[loop_times-1].sub(profits[loop_times-1].mul(DAO_fee).div(100));
-      claim_increases[loop_times-1] = profits[loop_times-1].sub(profits[loop_times-1].mul(royalty_fee).div(100))
-      for (let i = loop_times-2; i >= 0; i -= 1){
-        profits[i] = profits[i+1].mul(royalty_fee).div(100).add(await SparkLink.getShillPriceByNFTId(nft_ids[i]));
-        profits[i] = profits[i].sub(profits[i].mul(DAO_fee).div(100));
-        claim_increases[i] = profits[i].sub(profits[i].mul(royalty_fee).div(100));
-      }
-      for (let i = loop_times-1; i >= 1; i -= 1) {
-        shill_prices[i] = shill_prices[i].sub(shill_prices[i].mul(DAO_fee).div(100));
-      }
-      for (let i = loop_times-1; i >= 1; i -= 1) {
-        expect(shill_prices[i].sub(shill_prices[i].mul(royalty_fee).div(100))).to.eq(await SparkLink.getProfitByNFTId(nft_ids[i]));
-      }
-      for (let i = 0; i < loop_times; i += 1) {
-        expect(await SparkLink.getEditionIdByNFTId(nft_ids[i])).to.eq(i+1);
-      }
-      claim_increases[0] = profits[0];
-      for (let i = loop_times-1; i >= 0; i -= 1) {
-        let before_balance = await ethers.provider.getBalance(await SparkLink.ownerOf(nft_ids[i]));
-        let claim_event = await helper.claim_profit(SparkLink, caller, nft_ids[i]);
-        let amount = claim_event.args.amount;
-        let after_balance = await ethers.provider.getBalance(await SparkLink.ownerOf(nft_ids[i]));
-        expect(amount).to.eq(after_balance.sub(before_balance));
-        expect(claim_increases[i]).to.eq(amount);
-      }
-    })
-  });
-  context('determinePriceAndApprove()', async () => {
-    it('Should determinePriceAndApprove reject none exist Edition', async () => {
-      {
-        let other = accounts[1];
-        let caller = accounts[2];
-        let error_info = "SparkLink: Only owner can set the price";
-        const publish_event = await helper.publish(SparkLink);
-        let root_nft_id = publish_event.args.rootNFTId;
-        await expect(SparkLink.connect(caller).determinePriceAndApprove(root_nft_id, BigNumber.from(12), other.address)
-        ).to.be.revertedWith(error_info);
-      }
-    });
-
-    it('Should determinePriceAndApprove reject none exist Edition', async () => {
-      {
-        let other = accounts[1];
-        let error_info = "SparkLink: This NFT does not exist";
-        let invalid_parameter = spark_constant.nft_id_not_exist;
-        await expect(SparkLink.connect(other).determinePriceAndApprove(invalid_parameter, BigNumber.from(12), owner.address)
-        ).to.be.revertedWith(error_info);
-      }
-    });
-
-    it('Should determinePriceAndApprove reject approve to owner', async () => {
-      {
-        let other = accounts[1];
-        let error_info = "SparkLink: Approval to current owner"
-        const publish_event = await helper.publish(SparkLink);
-        let root_nft_id = publish_event.args.rootNFTId;
-        await expect(SparkLink.connect(owner).determinePriceAndApprove(root_nft_id, BigNumber.from(12), owner.address)
-        ).to.be.revertedWith(error_info);
-      }
-    });
-
-    it('should determine a price and approve', async () => {
-      const owner = accounts[1];
-      const receiver = accounts[2];
-      const transfer_event = await helper.accept_shill(SparkLink, owner);
-      const nft_id = transfer_event.args.tokenId;
-      const transfer_price = BigNumber.from(100);
-      await SparkLink
-        .connect(owner)
-        .determinePriceAndApprove(nft_id, transfer_price, receiver.address);
-      const event = (await SparkLink.queryFilter(SparkLink.filters.DeterminePriceAndApprove()))[0];
-      expect(event.args.transfer_price).to.eq(transfer_price);
-      expect(event.args.to).to.eq(receiver.address);
-    });
-
-    it('should determine and approve several times work', async () => {
-      const owner = accounts[1];
-      const receiver = accounts[2];
-      const transfer_event = await helper.accept_shill(SparkLink, owner);
-      const nft_id = transfer_event.args.tokenId;
-      const transfer_price = BigNumber.from(100);
-      let loop_times = 5;
-      for (let i = 0; i < loop_times; i += 1) {
-        await SparkLink
-          .connect(owner)
-          .determinePriceAndApprove(nft_id, transfer_price.mul(i), accounts[i+3].address);
-        const event = (await SparkLink.queryFilter(SparkLink.filters.DeterminePriceAndApprove()))[i];
-        expect(event.args.NFT_id).to.eq(nft_id);
-        expect(event.args.transfer_price).to.eq(transfer_price.mul(i));
-        expect(event.args.to).to.eq(accounts[i+3].address);
-      }
-    });
-  });
-
-  context('determinePrice()', async () => {
-    it('Should determinePrice reject none exist Edition', async () => {
-      {
-        let other = accounts[1];
-        let error_info = "SparkLink: This NFT does not exist";
-        let invalid_parameter = spark_constant.nft_id_not_exist;
-        await expect(SparkLink.connect(other).determinePrice(invalid_parameter, BigNumber.from(12))
-                  ).to.be.revertedWith(error_info);
-      }
-    });
-
-    it('should determine a price', async () => {
-      const owner = accounts[1];
-      const receiver = accounts[2];
-      const transfer_event = await helper.accept_shill(SparkLink, owner);
-      const nft_id = transfer_event.args.tokenId;
-      const transfer_price = BigNumber.from(100);
-      await SparkLink
-        .connect(owner)
-        .determinePrice(nft_id, transfer_price);
-      const event = (await SparkLink.queryFilter(SparkLink.filters.DeterminePrice()))[0];
-      expect(event.args.NFT_id).to.eq(nft_id);
-      expect(event.args.transfer_price).to.eq(transfer_price);
-    });
-
-    it('should determine a price several times work', async () => {
-      const owner = accounts[1];
-      const receiver = accounts[2];
-      const transfer_event = await helper.accept_shill(SparkLink, owner);
-      const nft_id = transfer_event.args.tokenId;
-      const transfer_price = BigNumber.from(100);
-      let loop_times = 5;
-      for (let i = 0; i < loop_times; i += 1) {
-        await SparkLink
-          .connect(owner)
-          .determinePrice(nft_id, transfer_price.mul(i));
-        const event = (await SparkLink.queryFilter(SparkLink.filters.DeterminePrice()))[i];
-        expect(event.args.NFT_id).to.eq(nft_id);
-        expect(event.args.transfer_price).to.eq(transfer_price.mul(i));
-      }
-    });
-  });
-
-  context('safeTransferFrom()', async () => {
-    it('should transfer an NFT from one to another', async () => {
-      let transfer_event = await helper.accept_shill(SparkLink, accounts[1]);
-      const owner = accounts[1];
-      const receiver = accounts[2];
-      const nft_id = transfer_event.args.tokenId;
-      const price = BigNumber.from(100);
-
-      await SparkLink.connect(owner).determinePriceAndApprove(nft_id, price, receiver.address);
-
-      await SparkLink.connect(receiver)["safeTransferFrom(address,address,uint256)"](
-        owner.address,
-        receiver.address,
-        nft_id,
-        { value: price }
-      );
-
-      transfer_event = (await SparkLink.queryFilter(SparkLink.filters.Transfer(
-        owner.address,
-        receiver.address,
-        nft_id
-      )))[0];
-
-      expect(transfer_event.args.from).to.eq(owner.address);
-      expect(transfer_event.args.to).to.eq(receiver.address);
-      expect(transfer_event.args.tokenId).to.eq(nft_id);
-    });
-
-    it('should transfer give correct profit to seller', async () => {
-      let publish_event = await helper.publish(SparkLink);
-      const nft_id = publish_event.args.rootNFTId;
-      const price_base = BigNumber.from(100);
-      const price_increase = BigNumber.from(11451);
-      const loop_times = 10;
-      for (let i = 0; i < loop_times; i += 1) {
-        await SparkLink.connect(accounts[i]).determinePriceAndApprove(nft_id, price_base.add(price_increase.mul(i)), accounts[i+1].address);
-        const before_owner_balance = await ethers.provider.getBalance(accounts[i].address);
-        await SparkLink.connect(accounts[i+1])["safeTransferFrom(address,address,uint256)"](
-          accounts[i].address,
-          accounts[i+1].address,
-          nft_id,
-          { value: price_base.add(price_increase.mul(i))}
-        );      
-        let transfer_event = (await SparkLink.queryFilter(SparkLink.filters.Transfer(
-          accounts[i].address,
-          accounts[i+1].address,
-          nft_id
-        )))[0];
-        expect(transfer_event.args.from).to.eq(accounts[i].address);
-        expect(transfer_event.args.to).to.eq(accounts[i+1].address);
-        expect(transfer_event.args.tokenId).to.eq(nft_id);
-        let claim_event = (await SparkLink.queryFilter(SparkLink.filters.Claim(
-          nft_id,
-          accounts[i].address,
-          null
-        )))[0];
-        const after_owner_balance = await ethers.provider.getBalance(accounts[i].address);
-        let true_price = price_base.add(price_increase.mul(i));
-        true_price = true_price.sub(true_price.mul(spark_constant.DAO_fee).div(100));
-        expect(claim_event.args.amount).to.eq(true_price);
-        expect(after_owner_balance.sub(before_owner_balance)).to.eq(true_price);
-      }
-    })
-
-    it('should transfer give correct profit to seller and father NFT holder', async () => {
-      const owner = accounts[0];
-      const base_account_index = 2;
-      let publish_event = await helper.publish(SparkLink);
-      const root_nft_id = publish_event.args.rootNFTId;
-      const royalty_fee = await SparkLink.getRoyaltyFeeByNFTId(publish_event.args.rootNFTId);
-      let accept_shill_event = await helper.accept_shill(SparkLink, accounts[2], root_nft_id);
-      let nft_id = accept_shill_event.args.tokenId;
-      const price_base = BigNumber.from(10000000);
-      const price_increase = BigNumber.from(114510000);
-      const loop_times = 15;
-      await SparkLink.connect(caller).claimProfit(root_nft_id);
-      for (let i = base_account_index; i < loop_times; i += 1) {
-        let transfer_price = price_base.add(price_increase.mul(i));
-        let exclude_DAO_transfer_price = transfer_price.sub(transfer_price.mul(spark_constant.DAO_fee).div(100));
-        let transfer_royalty_price = exclude_DAO_transfer_price.mul(royalty_fee).div(100);
-        let transfer_remain_price = exclude_DAO_transfer_price.sub(transfer_royalty_price);
-        await SparkLink.connect(accounts[i]).determinePriceAndApprove(nft_id, transfer_price, accounts[i+1].address);
-        const before_owner_balance = await ethers.provider.getBalance(accounts[i].address);
-        const before_father_balance = await ethers.provider.getBalance(owner.address);
-        await SparkLink.connect(accounts[i+1])["safeTransferFrom(address,address,uint256)"](
-          accounts[i].address,
-          accounts[i+1].address,
-          nft_id,
-          { value: price_base.add(price_increase.mul(i))}
-        );
-        let transfer_event = (await SparkLink.queryFilter(SparkLink.filters.Transfer(
-          accounts[i].address,
-          accounts[i+1].address,
-          nft_id
-        )))[0];
-        expect(transfer_event.args.from).to.eq(accounts[i].address);
-        expect(transfer_event.args.to).to.eq(accounts[i+1].address);
-        expect(transfer_event.args.tokenId).to.eq(nft_id);
-        let transfer_claim_event = (await SparkLink.queryFilter(SparkLink.filters.Claim(
-          nft_id,
-          accounts[i].address,
-          null
-        )))[0]
-        await SparkLink.connect(caller).claimProfit(root_nft_id);
-        let claim_father_event = (await SparkLink.queryFilter(SparkLink.filters.Claim(
-          root_nft_id,
-          owner.address,
-          null
-        )))[i-base_account_index+1];
-        transfer_royalty_price = transfer_royalty_price.sub(transfer_royalty_price.mul(spark_constant.DAO_fee).div(100));
-        expect(claim_father_event.args.amount).to.eq(transfer_royalty_price);
-        const after_father_balance = await ethers.provider.getBalance(owner.address);
-        const after_owner_balance = await ethers.provider.getBalance(accounts[i].address);
-        expect(transfer_claim_event.args.amount).to.eq(transfer_remain_price);
-        expect(after_owner_balance.sub(before_owner_balance)).to.eq(transfer_remain_price);
-        expect(after_father_balance.sub(before_father_balance)).to.eq(transfer_royalty_price);
-      }
-    });
-    it('should transfer give correct profit to seller and father NFT holder with test token', async () => {
-      const TestTokenA = await ethers.getContractFactory('TestTokenA');
-      const testTokenA = await TestTokenA.deploy(spark_constant.testTokenMintAmount);
-      let testTokenAContract = await testTokenA.deployed();
-      let test_token_parameter = spark_constant.valid_publish_parameters;
-      test_token_parameter.token_addr = testTokenAContract.address;
-      const publish_event = await helper.publish(
-        SparkLink,
-        test_token_parameter._first_sell_price,
-        test_token_parameter._royalty_fee,
-        test_token_parameter._shill_times,
-        test_token_parameter.ipfs_hash,
-        testTokenAContract.address
-        );
-      const owner = accounts[0];
-      const caller = accounts[1];
-      const base_account_index = 2;
-      const root_nft_id = publish_event.args.rootNFTId;
-      const royalty_fee = await SparkLink.getRoyaltyFeeByNFTId(publish_event.args.rootNFTId);
-      await testTokenAContract.connect(owner).transfer(accounts[2].address, test_token_parameter._first_sell_price);
-      await testTokenAContract.connect(accounts[2]).approve(SparkLink.address, test_token_parameter._first_sell_price);
-      let accept_shill_event = await helper.accept_shill(SparkLink, accounts[2], root_nft_id);
-      let nft_id = accept_shill_event.args.tokenId;
-      const price_base = BigNumber.from(100);
-      const price_increase = BigNumber.from(11451);
-      const loop_times = 15;
-      await SparkLink.connect(caller).claimProfit(root_nft_id);
-      for (let i = base_account_index; i < loop_times; i += 1) {
-        let transfer_price = price_base.add(price_increase.mul(i));
-        let exclude_DAO_transfer_price = transfer_price.sub(transfer_price.mul(spark_constant.DAO_fee).div(100));
-        let transfer_royalty_price = exclude_DAO_transfer_price.mul(royalty_fee).div(100);
-        let transfer_remain_price = exclude_DAO_transfer_price.sub(transfer_royalty_price);
-        await SparkLink.connect(accounts[i]).determinePriceAndApprove(nft_id, transfer_price, accounts[i+1].address);
-        await testTokenAContract.connect(owner).transfer(accounts[i+1].address, price_base.add(price_increase.mul(i)));
-        await testTokenAContract.connect(accounts[i+1]).approve(SparkLink.address, price_base.add(price_increase.mul(i)));
-        const before_owner_balance = await testTokenAContract.balanceOf(accounts[i].address);
-        const before_father_balance = await testTokenAContract.balanceOf(owner.address);
-        await SparkLink.connect(accounts[i+1])["safeTransferFrom(address,address,uint256)"](
-          accounts[i].address,
-          accounts[i+1].address,
-          nft_id,
-          { value: price_base.add(price_increase.mul(i))}
-        );
-        let transfer_event = (await SparkLink.queryFilter(SparkLink.filters.Transfer(
-          accounts[i].address,
-          accounts[i+1].address,
-          nft_id
-        )))[0];
-        expect(transfer_event.args.from).to.eq(accounts[i].address);
-        expect(transfer_event.args.to).to.eq(accounts[i+1].address);
-        expect(transfer_event.args.tokenId).to.eq(nft_id);
-        let transfer_claim_event = (await SparkLink.queryFilter(SparkLink.filters.Claim(
-          nft_id,
-          accounts[i].address,
-          null
-        )))[0]
-        await SparkLink.connect(caller).claimProfit(root_nft_id);
-        let claim_father_event = (await SparkLink.queryFilter(SparkLink.filters.Claim(
-          root_nft_id,
-          owner.address,
-          null
-        )))[i-base_account_index+1];
-        transfer_royalty_price = transfer_royalty_price.sub(transfer_royalty_price.mul(spark_constant.DAO_fee).div(100));
-        expect(claim_father_event.args.amount).to.eq(transfer_royalty_price);
-        const after_father_balance = await testTokenAContract.balanceOf(owner.address);
-        const after_owner_balance = await testTokenAContract.balanceOf(accounts[i].address);
-        expect(transfer_claim_event.args.amount).to.eq(transfer_remain_price);
-        expect(after_owner_balance.sub(before_owner_balance)).to.eq(transfer_remain_price);
-        expect(after_father_balance.sub(before_father_balance)).to.eq(transfer_royalty_price);
-      }
-    })
-  });
-
-  context('approve()', async () => {
-    it('Should approve reject approve to owner', async () => {
-      {
-        let other = accounts[1];
-        let error_info = "SparkLink: Approval to current owner";
-        const publish_event = await helper.publish(SparkLink);
-        let root_nft_id = publish_event.args.rootNFTId;
-        await expect(SparkLink.connect(owner).approve(owner.address, root_nft_id)
-          ).to.be.revertedWith(error_info);
-      }
-    });
-
-    it('Should approve reject caller who is not owner', async () => {
-      {
-        let other = accounts[1];
-        let caller = accounts[3];
-        let error_info = "SparkLink: Approve caller is not owner nor approved for all";
-        const publish_event = await helper.publish(SparkLink);
-        let root_nft_id = publish_event.args.rootNFTId;
-        await expect(SparkLink.connect(caller).approve(other.address, root_nft_id)
-          ).to.be.revertedWith(error_info);
-      }
-    });
-
-    it("should approve an NFT from owner", async () => {
-      let publish_event = await helper.publish(SparkLink);
-      let root_nft_id = publish_event.args.rootNFTId;
-      let owner = accounts[0];
-      let other = accounts[1];
-      await SparkLink.connect(owner).approve(other.address, root_nft_id);
-      const event = (await SparkLink.queryFilter(SparkLink.filters.Approval()))[0];
-      expect(other.address).to.eq(event.args.approved);
-    })
-  });
-
-  context('setApprovalForAll()', async () => {
-    it('Should setApprovalForAll reject approve to caller', async () => {
-      {
-        await helper.publish(SparkLink);
-        let owner = accounts[0];
-        let error_info = "SparkLink: Approve to caller";
-        await expect(SparkLink.connect(owner).setApprovalForAll(owner.address, true)).to.be.revertedWith(error_info);
-      }
-    });
-
-    it("should approve all an NFT from owner", async () => {
-      await helper.publish(SparkLink);
-      let owner = accounts[0];
-      let other = accounts[1];
-      await SparkLink.connect(owner).setApprovalForAll(other.address, true);
-      expect(true).to.eq(await SparkLink.isApprovedForAll(owner.address,other.address));
-    })
-
-    it("should chancel approve all an NFT from owner", async () => {
-      await helper.publish(SparkLink);
-      let owner = accounts[0];
-      let other = accounts[1];
-      await SparkLink.connect(owner).setApprovalForAll(other.address, true);
-      expect(true).to.eq(await SparkLink.isApprovedForAll(owner.address,other.address));
-      await SparkLink.connect(owner).setApprovalForAll(other.address, false);
-      expect(false).to.eq(await SparkLink.isApprovedForAll(owner.address,other.address));
-    })
-  })
-
-  context('setURI()', async () => {
-    it("should setURI work", async () => {
-      const publish_event = await helper.publish(SparkLink);
-      const tokenId = publish_event.args.rootNFTId;
-      const ipfs_hash = spark_constant.hash_2._hash;
-      const URI = spark_constant.hash_2._URI;
-      const SetURI_event = await helper.setURI(SparkLink, owner, tokenId, ipfs_hash);
-      expect("0x"+ipfs_hash).to.eq(SetURI_event.args.new_URI);
-      expect(await SparkLink.tokenURI(tokenId)).to.eq(URI);
-    })
-    it ("should setURI reverted with invalid Id", async () => {
-      const invalid_parameter = spark_constant.overflow_NFT_id_value;
-      await expect(SparkLink.connect(owner).setURI(invalid_parameter, Buffer.from(spark_constant.hash_2._hash, "hex"))).to.be.reverted;
-    })
-    it ("should setURI reverted with invalid Id", async () => {
-      const invalid_parameter = spark_constant.nft_id_not_exist;
-      await expect(SparkLink.connect(owner).setURI(invalid_parameter, Buffer.from(spark_constant.hash_2._hash, "hex"))).to.be.reverted;
-    })
-    it ("should setURI reverted with account not owner", async () => {
-      const caller = accounts[1];
-      const publish_event = await helper.publish(SparkLink);
-      const tokenId = publish_event.args.rootNFTId;
-      const error_info = "SparkLink: Only owner can set the token URI";
-      await expect(SparkLink.connect(caller).setURI(tokenId, Buffer.from(spark_constant.hash_2._hash, "hex"))).to.be.revertedWith(error_info);
-    })
-    it ("should setURI reverted with ND attribute", async () => {
-      const caller = accounts[1];
-      const other = accounts[2];
-      const valid_parameter = spark_constant.valid_publish_parameters_with_ND;
-      const publish_event = await helper.publish(
-        SparkLink,
-        valid_parameter._first_sell_price, 
-        valid_parameter._royalty_fee, 
-        valid_parameter._shill_times, 
-        valid_parameter.ipfs_hash,
-        valid_parameter.token_addr,
-        valid_parameter.is_free,
-        valid_parameter.is_NC,
-        valid_parameter.is_ND
-      );
-      const root_nft_id = publish_event.args.rootNFTId;
-      await SparkLink.connect(other).acceptShill(root_nft_id, {value: 100});
-      const transfer_event = (await SparkLink.queryFilter(SparkLink.filters.Transfer(ethers.constants.AddressZero, other.address, null)))[0];;
-      const tokenId = transfer_event.args.tokenId;
-      const error_info = "SparkLink: NFT follows the ND protocol, only the root NFT's URI can be set.";
-      await expect(SparkLink.connect(other).setURI(tokenId, Buffer.from(spark_constant.hash_2._hash, "hex"))).to.be.revertedWith(error_info);
-    })
-  })
-
-  context("label()", async () => {
-    it("should label work and emit Label event", async () => {
-      const publish_event = await helper.publish(SparkLink);
-      const tokenId = publish_event.args.rootNFTId;
-      const label = spark_constant.label1;
-      await SparkLink.connect(owner).label(tokenId, label);
-      const label_event = (await SparkLink.queryFilter(SparkLink.filters.Label(tokenId, null)))[0];
-      expect(label_event.args.content).to.eq(label);
-    })
-    it("should label work and emit Label event with UTF8", async () => {
-      const publish_event = await helper.publish(SparkLink);
-      const tokenId = publish_event.args.rootNFTId;
-      const label = spark_constant.label1;
-      await SparkLink.connect(owner).label(tokenId, label);
-      const label_event = (await SparkLink.queryFilter(SparkLink.filters.Label(tokenId, null)))[0];
-      expect(label_event.args.content).to.eq(label);
-    })
-    it ("should label reverted with invalid Id", async () => {
-      const invalid_parameter = spark_constant.overflow_NFT_id_value;
-      const label = spark_constant.label1;
-      await expect(SparkLink.connect(owner).label(invalid_parameter,label)).to.be.reverted;
-    })
-    it ("should label reverted with invalid Id", async () => {
-      const invalid_parameter = spark_constant.nft_id_not_exist;
-      const label = spark_constant.label1;
-      await expect(SparkLink.connect(owner).label(invalid_parameter,label)).to.be.reverted;
-    })
-    it ("should setURI reverted with account not owner", async () => {
-      const caller = accounts[1];
-      const publish_event = await helper.publish(SparkLink);
-      const tokenId = publish_event.args.rootNFTId;
-      const label = spark_constant.label1;
-      const error_info = "SparkLink: Only owner can label this NFT";
-      await expect(SparkLink.connect(caller).label(tokenId, label)).to.be.revertedWith(error_info);
-    })
-  })
-
-  context('getApproved()', async () => {
-    it("should getApproved correct approve address", async () => {
-      let publish_event = await helper.publish(SparkLink);
-      let root_nft_id = publish_event.args.rootNFTId;
-      let owner = accounts[0];
-      let other = accounts[1];
-      await SparkLink.connect(owner).approve(other.address, root_nft_id);
-      expect(other.address).to.eq(await SparkLink.getApproved(root_nft_id));
-    })
-
-    it("should getApproved reject none exist token", async () => {
-      let invalid_parameter = spark_constant.nft_id_not_exist;
-      let error_info = "SparkLink: Approved query for nonexistent token";
-      await expect(SparkLink.getApproved(invalid_parameter)).to.be.revertedWith(error_info);
-    })
-
-    it("should getApproved reject overflow tokenId", async () => {
-      let invalid_parameter = spark_constant.overflow_NFT_id_value;
-      let error_info = "SparkLink: Value doesn't fit in 64 bits";
-      await expect(SparkLink.getApproved(invalid_parameter)).to.be.revertedWith(error_info);
-    })
-  })
-
-  context('getFatherByNFTId()', async () => {
-    it("should getFatherByNFTId reject none exist token", async () => {
-      let invalid_parameter = spark_constant.nft_id_not_exist;
-      let error_info = "SparkLink: Edition is not exist.";
-      await expect(SparkLink.getFatherByNFTId(invalid_parameter)).to.be.revertedWith(error_info);
-    })
-
-    it("should getFatherByNFTId work", async () => {
-      const other = accounts[1];
-      const publish_event = await helper.publish(SparkLink);
-      const root_nft_id = publish_event.args.rootNFTId;
-      const accept_shill_event = await helper.accept_shill(SparkLink, other, root_nft_id);
-      const father_id = await SparkLink.getFatherByNFTId(accept_shill_event.args.tokenId);
-      expect(father_id).to.eq(root_nft_id);
-    })
-  })
-
-  context('getTransferPriceByNFTId()', async () => {
-    it("should getTransferPriceByNFTId reject none exist token", async () => {
-      let invalid_parameter = spark_constant.nft_id_not_exist;
-      let error_info = "SparkLink: Edition is not exist.";
-      await expect(SparkLink.getTransferPriceByNFTId(invalid_parameter)).to.be.revertedWith(error_info);
-    })
-  })
-
-  context('getShillPriceByNFTId()', async () => {
-    it("should getShillPriceByNFTId reject none exist token", async () => {
-      let invalid_parameter = spark_constant.nft_id_not_exist;
-      let error_info = "SparkLink: Edition is not exist.";
-      await expect(SparkLink.getShillPriceByNFTId(invalid_parameter)).to.be.revertedWith(error_info);
-    })
-  })
-
-  context('getRemainShillTimesByNFTId()', async () => {
-    it("should getRemainShillTimesByNFTId reject none exist token", async () => {
-      let invalid_parameter = spark_constant.nft_id_not_exist;
-      let error_info = "SparkLink: Edition is not exist.";
-      await expect(SparkLink.getRemainShillTimesByNFTId(invalid_parameter)).to.be.revertedWith(error_info);
-    })
-  })
-
-  context('getDepthByNFTId()', async () => {
-    it("should getDepthByNFTId reject none exist token", async () => {
-      let invalid_parameter = spark_constant.nft_id_not_exist;
-      let error_info = "SparkLink: Edition is not exist.";
-      await expect(SparkLink.getDepthByNFTId(invalid_parameter)).to.be.revertedWith(error_info);
-    })
-  })
-});
diff --git a/contract/tsconfig.json b/contract/tsconfig.json
deleted file mode 100644
index 7fe7de9..0000000
--- a/contract/tsconfig.json
+++ /dev/null
@@ -1,12 +0,0 @@
-{
-  "compilerOptions": {
-    "target": "es2018",
-    "module": "commonjs",
-    "strict": true,
-    "esModuleInterop": true,
-    "outDir": "dist",
-    "resolveJsonModule": true
-  },
-  "include": ["./scripts", "./test"],
-  "files": ["./hardhat.config.ts"]
-}
diff --git a/contract/yarn.lock b/contract/yarn.lock
deleted file mode 100644
index 2cc3849..0000000
--- a/contract/yarn.lock
+++ /dev/null
@@ -1,8885 +0,0 @@
-# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
-# yarn lockfile v1
-
-
-"@babel/code-frame@^7.0.0":
-  version "7.14.5"
-  resolved "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.14.5.tgz"
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-  dependencies:
-    "@babel/highlight" "^7.14.5"
-
-"@babel/helper-validator-identifier@^7.14.5":
-  version "7.14.9"
-  resolved "https://registry.npmjs.org/@babel/helper-validator-identifier/-/helper-validator-identifier-7.14.9.tgz"
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-
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-  version "7.14.5"
-  resolved "https://registry.npmjs.org/@babel/highlight/-/highlight-7.14.5.tgz"
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-  dependencies:
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-    chalk "^2.0.0"
-    js-tokens "^4.0.0"
-
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-  resolved "https://registry.npmjs.org/@cspotcode/source-map-consumer/-/source-map-consumer-0.8.0.tgz"
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-
-"@cspotcode/source-map-support@0.6.1":
-  version "0.6.1"
-  resolved "https://registry.npmjs.org/@cspotcode/source-map-support/-/source-map-support-0.6.1.tgz"
-  integrity sha512-DX3Z+T5dt1ockmPdobJS/FAsQPW4V4SrWEhD2iYQT2Cb2tQsiMnYxrcUH9By/Z3B+v0S5LMBkQtV/XOBbpLEOg==
-  dependencies:
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-
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-  version "0.4.5"
-  resolved "https://registry.npmjs.org/@ensdomains/ens/-/ens-0.4.5.tgz"
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-  dependencies:
-    bluebird "^3.5.2"
-    eth-ens-namehash "^2.0.8"
-    solc "^0.4.20"
-    testrpc "0.0.1"
-    web3-utils "^1.0.0-beta.31"
-
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-  version "0.2.4"
-  resolved "https://registry.npmjs.org/@ensdomains/resolver/-/resolver-0.2.4.tgz"
-  integrity sha512-bvaTH34PMCbv6anRa9I/0zjLJgY4EuznbEMgbV77JBCQ9KNC46rzi0avuxpOfu+xDjPEtSFGqVEOr5GlUSGudA==
-
-"@ethereum-waffle/chai@^3.4.0":
-  version "3.4.0"
-  resolved "https://registry.npmjs.org/@ethereum-waffle/chai/-/chai-3.4.0.tgz"
-  integrity sha512-GVaFKuFbFUclMkhHtQTDnWBnBQMJc/pAbfbFj/nnIK237WPLsO3KDDslA7m+MNEyTAOFrcc0CyfruAGGXAQw3g==
-  dependencies:
-    "@ethereum-waffle/provider" "^3.4.0"
-    ethers "^5.0.0"
-
-"@ethereum-waffle/compiler@^3.4.0":
-  version "3.4.0"
-  resolved "https://registry.npmjs.org/@ethereum-waffle/compiler/-/compiler-3.4.0.tgz"
-  integrity sha512-a2wxGOoB9F1QFRE+Om7Cz2wn+pxM/o7a0a6cbwhaS2lECJgFzeN9xEkVrKahRkF4gEfXGcuORg4msP0Asxezlw==
-  dependencies:
-    "@resolver-engine/imports" "^0.3.3"
-    "@resolver-engine/imports-fs" "^0.3.3"
-    "@typechain/ethers-v5" "^2.0.0"
-    "@types/mkdirp" "^0.5.2"
-    "@types/node-fetch" "^2.5.5"
-    ethers "^5.0.1"
-    mkdirp "^0.5.1"
-    node-fetch "^2.6.1"
-    solc "^0.6.3"
-    ts-generator "^0.1.1"
-    typechain "^3.0.0"
-
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-  version "3.3.0"
-  resolved "https://registry.npmjs.org/@ethereum-waffle/ens/-/ens-3.3.0.tgz"
-  integrity sha512-zVIH/5cQnIEgJPg1aV8+ehYicpcfuAisfrtzYh1pN3UbfeqPylFBeBaIZ7xj/xYzlJjkrek/h9VfULl6EX9Aqw==
-  dependencies:
-    "@ensdomains/ens" "^0.4.4"
-    "@ensdomains/resolver" "^0.2.4"
-    ethers "^5.0.1"
-
-"@ethereum-waffle/mock-contract@^3.3.0":
-  version "3.3.0"
-  resolved "https://registry.npmjs.org/@ethereum-waffle/mock-contract/-/mock-contract-3.3.0.tgz"
-  integrity sha512-apwq0d+2nQxaNwsyLkE+BNMBhZ1MKGV28BtI9WjD3QD2Ztdt1q9II4sKA4VrLTUneYSmkYbJZJxw89f+OpJGyw==
-  dependencies:
-    "@ethersproject/abi" "^5.0.1"
-    ethers "^5.0.1"
-
-"@ethereum-waffle/provider@^3.4.0":
-  version "3.4.0"
-  resolved "https://registry.npmjs.org/@ethereum-waffle/provider/-/provider-3.4.0.tgz"
-  integrity sha512-QgseGzpwlzmaHXhqfdzthCGu5a6P1SBF955jQHf/rBkK1Y7gGo2ukt3rXgxgfg/O5eHqRU+r8xw5MzVyVaBscQ==
-  dependencies:
-    "@ethereum-waffle/ens" "^3.3.0"
-    ethers "^5.0.1"
-    ganache-core "^2.13.2"
-    patch-package "^6.2.2"
-    postinstall-postinstall "^2.1.0"
-
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-  version "3.4.0"
-  resolved "https://registry.npmjs.org/@ethereumjs/block/-/block-3.4.0.tgz"
-  integrity sha512-umKAoTX32yXzErpIksPHodFc/5y8bmZMnOl6hWy5Vd8xId4+HKFUOyEiN16Y97zMwFRysRpcrR6wBejfqc6Bmg==
-  dependencies:
-    "@ethereumjs/common" "^2.4.0"
-    "@ethereumjs/tx" "^3.3.0"
-    ethereumjs-util "^7.1.0"
-    merkle-patricia-tree "^4.2.0"
-
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-  integrity sha512-wAuKLaew6PL52kH8YPXO7PbjjKV12jivRSyHQehkESw4slSLLfYA6Jv7n5YxyT2ajD7KNMPVh7oyF/MU6HcOvg==
-  dependencies:
-    "@ethereumjs/block" "^3.4.0"
-    "@ethereumjs/common" "^2.4.0"
-    "@ethereumjs/ethash" "^1.0.0"
-    debug "^2.2.0"
-    ethereumjs-util "^7.1.0"
-    level-mem "^5.0.1"
-    lru-cache "^5.1.1"
-    rlp "^2.2.4"
-    semaphore-async-await "^1.5.1"
-
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-  integrity sha512-UdkhFWzWcJCZVsj1O/H8/oqj/0RVYjLc1OhPjBrQdALAkQHpCp8xXI4WLnuGTADqTdJZww0NtgwG+TRPkXt27w==
-  dependencies:
-    crc-32 "^1.2.0"
-    ethereumjs-util "^7.1.0"
-
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-  dependencies:
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-    buffer-xor "^2.0.1"
-    ethereumjs-util "^7.0.7"
-    miller-rabin "^4.0.0"
-
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-  dependencies:
-    "@ethereumjs/common" "^2.4.0"
-    ethereumjs-util "^7.1.0"
-
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-  version "5.5.2"
-  resolved "https://registry.npmjs.org/@ethereumjs/vm/-/vm-5.5.2.tgz"
-  integrity sha512-AydZ4wfvZAsBuFzs3xVSA2iU0hxhL8anXco3UW3oh9maVC34kTEytOfjHf06LTEfN0MF9LDQ4ciLa7If6ZN/sg==
-  dependencies:
-    "@ethereumjs/block" "^3.4.0"
-    "@ethereumjs/blockchain" "^5.4.0"
-    "@ethereumjs/common" "^2.4.0"
-    "@ethereumjs/tx" "^3.3.0"
-    async-eventemitter "^0.2.4"
-    core-js-pure "^3.0.1"
-    debug "^2.2.0"
-    ethereumjs-util "^7.1.0"
-    functional-red-black-tree "^1.0.1"
-    mcl-wasm "^0.7.1"
-    merkle-patricia-tree "^4.2.0"
-    rustbn.js "~0.2.0"
-    util.promisify "^1.0.1"
-
-"@ethersproject/abi@5.0.0-beta.153":
-  version "5.0.0-beta.153"
-  resolved "https://registry.npmjs.org/@ethersproject/abi/-/abi-5.0.0-beta.153.tgz"
-  integrity sha512-aXweZ1Z7vMNzJdLpR1CZUAIgnwjrZeUSvN9syCwlBaEBUFJmFY+HHnfuTI5vIhVs/mRkfJVrbEyl51JZQqyjAg==
-  dependencies:
-    "@ethersproject/address" ">=5.0.0-beta.128"
-    "@ethersproject/bignumber" ">=5.0.0-beta.130"
-    "@ethersproject/bytes" ">=5.0.0-beta.129"
-    "@ethersproject/constants" ">=5.0.0-beta.128"
-    "@ethersproject/hash" ">=5.0.0-beta.128"
-    "@ethersproject/keccak256" ">=5.0.0-beta.127"
-    "@ethersproject/logger" ">=5.0.0-beta.129"
-    "@ethersproject/properties" ">=5.0.0-beta.131"
-    "@ethersproject/strings" ">=5.0.0-beta.130"
-
-"@ethersproject/abi@5.5.0", "@ethersproject/abi@^5.0.0-beta.146", "@ethersproject/abi@^5.0.1", "@ethersproject/abi@^5.1.2", "@ethersproject/abi@^5.4.0", "@ethersproject/abi@^5.5.0":
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