完整的报错
==================>查询存证请求
存证请求内容， datahash:0xaad2171441bd73b773e9a9e062753909360bdfcabbddbe93c6c58b13c5c0feaa, 创建人:0xF7A1938Fecc594aaF126d46fd173cE74A659ad9A, 附加信息:0x66656974757a6920616920646f756368757a69， 已投票:0n, 共需投票:2n
==================>存证请求需要两个以上地址vote
Error: could not coalesce error (error={ "code": -32000, "message": "the tx doesn't have the correct nonce. account has nonce of: 21 tx has nonce of: 20", "stack": "Error: the tx doesn't have the correct nonce. account has nonce of: 21 tx has nonce of: 20\n at TransactionPool.prepareTransaction (C:\\Program Files\\WindowsApps\\GanacheUI_2.7.1.0_x64__rb4352f0jd4m2\\app\\resources\\static\\node\\node_modules\\ganache\\dist\\node\\1.js:2:122021)" }, payload={ "id": 23, "jsonrpc": "2.0", "method": "eth_sendRawTransaction", "params": [ "0x02f89182053914843b9aca008445c21fcc830123d8941ea80e037af8715c7837638e1f4ed6d729029a9380a4ab9beda7aad2171441bd73b773e9a9e062753909360bdfcabbddbe93c6c58b13c5c0feaac080a0d596794b96bd555c3cf682d7968e02e986a7bf00ee6064b9112833f19cbfa57ea0090e9ba12302f6ab20108e2e0ab16248bb5d99e130bffdbb4daa3b39ae129f92" ] }, code=UNKNOWN_ERROR, version=6.9.0)
at makeError (C:\Users\linyang\evidence\node_modules\ethers\src.ts\utils\errors.ts:694:21)
at JsonRpcProvider.getRpcError (C:\Users\linyang\evidence\node_modules\ethers\src.ts\providers\provider-jsonrpc.ts:1007:25)
at C:\Users\linyang\evidence\node_modules\ethers\src.ts\providers\provider-jsonrpc.ts:527:45
at processTicksAndRejections (node:internal/process/task_queues:95:5) {
code: 'UNKNOWN_ERROR',
error: {
message: "the tx doesn't have the correct nonce. account has nonce of: 21 tx has nonce of: 20",
stack: "Error: the tx doesn't have the correct nonce. account has nonce of: 21 tx has nonce of: 20\n" +
' at TransactionPool.prepareTransaction (C:\\Program Files\\WindowsApps\\GanacheUI_2.7.1.0_x64__rb4352f0jd4m2\\app\\resources\\static\\node\\node_modules\\ganache\\dist\\node\\1.js:2:122021)',
code: -32000
},
payload: {
method: 'eth_sendRawTransaction',
params: [
'0x02f89182053914843b9aca008445c21fcc830123d8941ea80e037af8715c7837638e1f4ed6d729029a9380a4ab9beda7aad2171441bd73b773e9a9e062753909360bdfcabbddbe93c6c58b13c5c0feaac080a0d596794b96bd555c3cf682d7968e02e986a7bf00ee6064b9112833f19cbfa57ea0090e9ba12302f6ab20108e2e0ab16248bb5d99e130bffdbb4daa3b39ae129f92'
],
id: 23,
jsonrpc: '2.0'
},
shortMessage: 'could not coalesce error'
}
对应的Hardhat JavaScript代码
let evidenceContract = await new ethers.Contract(contractAddress, contractABI, provider);
let signer = await new ethers.Wallet("0x624cfb2cb9b9c3212abfa2800fd8de8e2501c84500336007f4459c50198c69f7", provider);
let evidenceContractConnected = await evidenceContract.connect(signer);
//创建一个存证请求
console.log("==================>新建存证请求");
const ext = ethers.toUtf8Bytes("feituzi ai douchuzi");
let txn = await evidenceContractConnected.createSaveRequest(sha256hash, ext);
console.log("创建存证请求, 交易结果: %s", txn);
await new Promise(r => setInterval(r, 1000));
console.log("==================>查询存证请求");
let request = await evidenceContractConnected.getRequestData(sha256hash);
//bytes32, address creator, bytes memory ext, uint8 voted, uint8 threshold
console.log("存证请求内容， datahash:%s, 创建人:%s, 附加信息:%s， 已投票:%s, 共需投票:%s",
request[0], request[1], request[2], request[3], request[4]);
await new Promise(r => setInterval(r, 1000));
//存证请求需要两个以上地址vote，第一个投票
console.log("==================>存证请求需要两个以上地址vote");
let result = await evidenceContractConnected.voteSaveRequest(sha256hash);
console.log("%s对存证请求的投票结果%s", await signer.getAddress(), result);
await new Promise(r => setInterval(r, 1000));
分析与解决
上面evidenceContractConnected是连了signer的合约对象，可以调用合约的写方法。然后在后面复用这个对象调用了多个方法，其中createSaveRequest，voteSaveRequest都是写方法。
the tx doesn't have the correct nonce. account has nonce of: 21 tx has nonce of: 20
上面这个报错意思是tx的nonce比account的落后1，google了一下都是建议两次调用之间加一下time wait，所以可以使用如下代码解决：
await new Promise(r => setInterval(r, 1000));