feat: Add gen script

[nguyennk92]

No description provided.

[cursor]

Bug: EIP-712 Hashing Bug with Dynamic Bytes

The isAtomic function incorrectly treats dynamic bytes as atomic, causing them to be directly encoded instead of keccak256 hashed in the generated EIP-712 hash function. Additionally, several variables (objs, fieldList, fields, hashString, functionString, obj) are implicitly declared as global, leading to scope pollution and potential conflicts.

gen-js/gen-sol.js#L3-L98

v3utils/gen-js/gen-sol.js

Lines 3 to 98 in 0a77207

	function isAtomic(t) {
	return t.startsWith('bytes') || t.startsWith('uint') || t.startsWith('int') || t === 'bool' || t === 'address';
	}
	objs = {}
	Object.keys(x).forEach(key => {
	objs[key] = {
	arr: x[key],
	objName: key,
	deps: [],
	};
	});
	function getDeps(obj, deps = []) {
	obj.arr.forEach(element => {
	if (objs[element.type]) {
	if (!deps.includes(element.type)) {
	deps.push(element.type);
	getDeps(objs[element.type], deps);
	}
	}
	});
	deps.sort();
	return deps;
	}
	function getInitHashString(obj) {
	fieldList = [];
	obj.arr.forEach(element => {
	fieldList.push(`${element.type} ${element.name}`);
	});
	fields = fieldList.join(',');
	hashString = `${obj.objName}(${fields})`;
	return hashString;
	}
	function getFullHashString(obj) {
	hashString = getInitHashString(obj);
	obj.deps.forEach(dep => {
	hashString += getInitHashString(objs[dep]);
	});
	return hashString;
	}
	function genTypeHashStatement(obj) {
	return ` // keccak256(
	// \"${getFullHashString(obj)}\"
	// );
	bytes32 constant ${obj.objName}_TYPEHASH = ${keccak256(getFullHashString(obj))};` // do NOT delete spaces
	}
	function genStruct(obj) {
	fieldList = [];
	obj.arr.forEach(element => {
	ename = element.name;
	if (element.name === 'type') {
	ename = '_type';
	}
	fieldList.push(` ${element.type} ${ename};\n`);
	});
	return ` struct ${obj.objName} {\n${fieldList.join('')} }` // do NOT delete spaces
	}
	function genHashFunction(obj) {
	fieldList = [`${obj.objName}_TYPEHASH`];
	obj.arr.forEach(element => {
	ename = element.name;
	if (element.name === 'type') {
	ename = '_type';
	}
	if (isAtomic(element.type)) {
	hashLine = `obj.${ename}`;
	} else if (element.type === 'string') {
	hashLine = `keccak256(bytes(obj.${ename}))`;
	} else if (element.type === 'bytes') {
	hashLine = `keccak256(obj.${ename})`;
	} else {
	hashLine = `_hash(obj.${ename})`;
	}
	fieldList.push(hashLine);
	});
	functionString = ` function _hash(${obj.objName} memory obj) internal pure returns (bytes32) {
	return keccak256(abi.encode(
	${fieldList.join(',\n ')}
	));
	}`
	return functionString;
	}
	Object.keys(objs).forEach(key => {
	objs[key].deps = getDeps(objs[key]);
	});
	Object.keys(objs).forEach(key => {
	obj = objs[key];

Fix in Cursor

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