Feat: add cosmos api version param to cosmos api

[vincentysc]

Issue

submit proposal with msg type /cosmos.gov.v1.MsgSubmitProposal and no msgs in the request will got error on cosmos API https://rest.testnet-croeseid-4.cronos-pos.org/cosmos/gov/v1beta1/proposals/1579

Error msg

codespace sdk code 29: invalid type: can't convert a gov/v1 Proposal to gov/v1beta1 Proposal when amount of proposal messages not exactly one

Solution

• use the msg type version as the cosmos API version
• e.g. when msg type /cosmos.gov.v1.MsgSubmitProposal version is v1, use v1 in Cosmos API https://rest.testnet-croeseid-4.cronos-pos.org/cosmos/gov/v1beta1/proposals/1579

Prove

MsgSubmitProposal and QueryProposalRequest are both under the same version v1beta1 .

MsgSubmitProposal in tx.proto
package cosmos.gov.v1beta1;

message MsgSubmitProposal {
  option (cosmos.msg.v1.signer) = "proposer";
  option (amino.name)           = "cosmos-sdk/MsgSubmitProposal";

  option (gogoproto.equal)           = false;
  option (gogoproto.goproto_getters) = false;

  // content is the proposal's content.
  google.protobuf.Any content = 1 [(cosmos_proto.accepts_interface) = "cosmos.gov.v1beta1.Content"];
...
}

https://github.com/crypto-org-chain/cosmos-sdk/blob/8d0a31ef043d1593cdfc702f9504ea7e199760c9/proto/cosmos/gov/v1beta1/tx.proto#L35-L43

QueryProposalRequest in query.proto
package cosmos.gov.v1beta1; 
rpc Proposal(QueryProposalRequest) returns (QueryProposalResponse) {
    option (google.api.http).get = "/cosmos/gov/v1beta1/proposals/{proposal_id}";
  }

https://github.com/crypto-org-chain/cosmos-sdk/blob/8d0a31ef043d1593cdfc702f9504ea7e199760c9/proto/cosmos/gov/v1beta1/query.proto#L16-L18