import { Bytes } from '@ethersproject/bytes'
const daoContractAddress = '0x000...';
const daoContract = getDaoContractInstance(daoContractAddress)
const daoWithSignContract = getDaoWithSignContractInstance(daoContractAddress)
const accounts = await ethereum.request({ method: 'eth_requestAccounts' })
const members = ['0x001...','0x002...','0x003...'];
let name = await daoWithSignContract.name();
let nonce = await daoWithSignContract.nonces(accounts[0]);
//签名过期时间(单位:秒)。此处示例为当前时间100s之后签名失效
let deadline = Date.parse(new Date()) / 1000 + 100;
let sign = await getSign(await buildAddMemberParam(
name,
daoWithSignContract.address.toLowerCase(),
daoContract.address.toLowerCase(),
members,
parseInt(nonce),
deadline),
accounts[0]);
let param = {
"sig": {"v": sign.v, "r": sign.r, "s": sign.s, "deadline": deadline},
"target": daoContract.address,
"addr": accounts[0],
"members": members
}
//实际场景中,这个方法由实际支付Gas的账户来调用
await expect(daoWithSignContract.connect(accounts[1]).addMemberWithSign(param));
async function getSign(msgParams, signerAddress) {
const params = [signerAddress, msgParams];
const trace = await hre.network.provider.send(
"eth_signTypedData_v4", params);
return Bytes.splitSignature(trace);
}
async function getChainId() {
return await ethereum.request({
method: 'eth_chainId',
});
}
async function buildAddMemberParam(name, contractAddress, daoContractAddress,members, nonce, deadline) {
return {
domain: {
chainId: await getChainId(),
name: name,
verifyingContract: contractAddress,
version: '1',
},
// Defining the message signing data content.
message: {
target: daoContractAddress,
members: members,
nonce: nonce,
deadline: deadline,
},
// Refers to the keys of the *types* object below.
primaryType: 'AddMemberWithSign',
types: {
EIP712Domain: [
{name: 'name', type: 'string'},
{name: 'version', type: 'string'},
{name: 'chainId', type: 'uint256'},
{name: 'verifyingContract', type: 'address'},
],
AddMemberWithSign: [
{name: 'target', type: 'address'},
{name: 'members', type: 'address[]'},
{name: 'nonce', type: 'uint256'},
{name: 'deadline', type: 'uint256'},
],
},
};
}