I'm developing smart wallet based application using ERC-4337 v0.6 . I'm trying to dynamically get the gas values of a user operation.
Currently I'm using Stackup's bundler for sending user operations .
From Alchemy's docs [ https://docs.alchemy.com/reference/eth-estimateuseroperationgas ] , I read that eth_estimateUserOperationGas estimates the gas values for a UserOperation .
Stackup also has support for eth_estimateUserOperationGas method .
I tried calling eth_estimateUserOperationGas method similar to how it is written in Alchemy's docs .
Why is it not working ?
Below is the code for Hardhat test :
it("dynamic userop",async function() {
const provider = new ethers.JsonRpcProvider("amoy-rpc-url");
const signer = new ethers.Wallet(SmartWalletOwnerPrivateKey,provider);
const nonceVal = await account.getNonce();
const feeData = await provider.getFeeData();// 2 values of EIP1559
const maxFeePerGasInWei = ethers.formatUnits(feeData.maxFeePerGas, 'wei');
const maxPriorityFeePerGasInWei = ethers.formatUnits(feeData.maxPriorityFeePerGas,"wei");
const sender = SmartWalletAddr; // smart account address
const nonce = String(nonceVal); // smart wallet nonce
const maxFeePerGas = maxFeePerGasInWei; // from provider.getFeeData()
const maxPriorityFeePerGas = maxPriorityFeePerGasInWei; // from provider.getFeeData()
const amount = '30000000000000000'; // amount to send to RECEIVER_ADDR
const tx = await account["execute"].populateTransaction(RECEIVER_ADDR,amount,"0x");
let calldata = tx.data;
console.log("calldata :",calldata);
const result = await axios.post(
"stackup-node-url",
{
jsonrpc: "2.0",
id: 1,
method: "eth_estimateUserOperationGas",
params: [
{
sender: SmartWalletAddr, // smart wallet address
nonce: nonce, // smart wallet nonce
initCode: '0x', // smart wallet is already deployed , therefore 0x
callData: calldata, // encoded calldata of SimpleAccount's execute method
callGasLimit: "500000", // hardcoded
verificationGasLimit: "500000", // hardcoded
preVerificationGas: "500000", // hardcoded
maxFeePerGas: maxFeePerGas, // from provider.getFeeData()
maxPriorityFeePerGas: maxPriorityFeePerGas, // from provider.getFeeData()
paymasterAndData: "0x", // no paymaster , therefore 0x
signature: "0xfffffffffffffffffffffffffffffff0000000000000000000000000000000007aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa1c" // dummy signature
},
EntryPointAddr
],
},
{
headers: {
accept: "application/json",
"content-type": "application/json",
},
}
);
console.log("result :",result);
const retObj = result.data.result; // this object contains callGasLimit , verificationGasLimit , preVerificationGas
});
I get the error :
result object : {
status: 200,
statusText: 'OK',
headers: Object [AxiosHeaders] {
date: 'Mon, 15 Jul 2024 05:29:14 GMT',
'content-type': 'application/json; charset=utf-8',
'content-length': '91',
connection: 'keep-alive',
'x-ratelimit-limit': '5',
'x-ratelimit-remaining': '4'
},
config: {
transitional: {
silentJSONParsing: true,
forcedJSONParsing: true,
clarifyTimeoutError: false
},
adapter: [ 'xhr', 'http', 'fetch' ],
transformRequest: [ [Function: transformRequest] ],
transformResponse: [ [Function: transformResponse] ],
timeout: 0,
xsrfCookieName: 'XSRF-TOKEN',
xsrfHeaderName: 'X-XSRF-TOKEN',
maxContentLength: -1,
maxBodyLength: -1,
env: { FormData: [Function], Blob: [class Blob] },
validateStatus: [Function: validateStatus],
headers: Object [AxiosHeaders] {
Accept: 'application/json',
'Content-Type': 'application/json',
'User-Agent': 'axios/1.7.2',
'Content-Length': '809',
'Accept-Encoding': 'gzip, compress, deflate, br'
},
method: 'post',
url: 'https://api.stackup.sh/v1/node/0a7b04765741d678a0c0ab9657a3ed6e1497a8fa582e0a4f48f8633e3722d604',
data: '{"jsonrpc":"2.0","id":1,"method":"eth_estimateUserOperationGas","params":[{"sender":"0xb9ee6DD790037808cf22ab17880Bb11b7B94ec99","nonce":"6","initCode":"0x","callData":"0xb61d27f6000000000000000000000000cf3d0e213f632e1a3a8fa7fd7a3d131d77b4c231000000000000000000000000000000000000000000000000006a94d74f43000000000000000000000000000000000000000000000000000000000000000000600000000000000000000000000000000000000000000000000000000000000000","callGasLimit":"500000","verificationGasLimit":"500000","preVerificationGas":"500000","maxFeePerGas":"327535714305","maxPriorityFeePerGas":"327535714275","paymasterAndData":"0x","signature":"0xfffffffffffffffffffffffffffffff0000000000000000000000000000000007aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa1c"},"0x5FF137D4b0FDCD49DcA30c7CF57E578a026d2789"]}'
},
request: <ref *1> ClientRequest {
_events: [Object: null prototype] {
abort: [Function (anonymous)],
aborted: [Function (anonymous)],
connect: [Function (anonymous)],
error: [Function (anonymous)],
socket: [Function (anonymous)],
timeout: [Function (anonymous)],
finish: [Function: requestOnFinish]
},
_eventsCount: 7,
_maxListeners: undefined,
outputData: [],
outputSize: 0,
writable: true,
destroyed: true,
_last: false,
chunkedEncoding: false,
shouldKeepAlive: true,
maxRequestsOnConnectionReached: false,
_defaultKeepAlive: true,
useChunkedEncodingByDefault: true,
sendDate: false,
_removedConnection: false,
_removedContLen: false,
_removedTE: false,
strictContentLength: false,
_contentLength: '809',
_hasBody: true,
_trailer: '',
finished: true,
_headerSent: true,
_closed: true,
socket: TLSSocket {
_tlsOptions: [Object],
_secureEstablished: true,
_securePending: false,
_newSessionPending: false,
_controlReleased: true,
secureConnecting: false,
_SNICallback: null,
servername: 'api.stackup.sh',
alpnProtocol: false,
authorized: true,
authorizationError: null,
encrypted: true,
_events: [Object: null prototype],
_eventsCount: 9,
connecting: false,
_hadError: false,
_parent: null,
_host: 'api.stackup.sh',
_closeAfterHandlingError: false,
_readableState: [ReadableState],
_maxListeners: undefined,
_writableState: [WritableState],
allowHalfOpen: false,
_sockname: null,
_pendingData: null,
_pendingEncoding: '',
server: undefined,
_server: null,
ssl: null,
_requestCert: true,
_rejectUnauthorized: true,
timeout: 5000,
parser: null,
_httpMessage: null,
autoSelectFamilyAttemptedAddresses: [Array],
handle: [TLSWrap],
[Symbol(alpncallback)]: null,
[Symbol(res)]: [TLSWrap],
[Symbol(verified)]: true,
[Symbol(pendingSession)]: null,
[Symbol(async_id_symbol)]: -1,
[Symbol(kHandle)]: [TLSWrap],
[Symbol(lastWriteQueueSize)]: 0,
[Symbol(timeout)]: Timeout {
_idleTimeout: 5000,
_idlePrev: [TimersList],
_idleNext: [Timeout],
_idleStart: 5758,
_onTimeout: [Function: bound ],
_timerArgs: undefined,
_repeat: null,
_destroyed: false,
[Symbol(refed)]: false,
[Symbol(kHasPrimitive)]: false,
[Symbol(asyncId)]: 5686,
[Symbol(triggerId)]: 5684
},
[Symbol(kBuffer)]: null,
[Symbol(kBufferCb)]: null,
[Symbol(kBufferGen)]: null,
[Symbol(kCapture)]: false,
[Symbol(kSetNoDelay)]: false,
[Symbol(kSetKeepAlive)]: true,
[Symbol(kSetKeepAliveInitialDelay)]: 1,
[Symbol(kBytesRead)]: 0,
[Symbol(kBytesWritten)]: 0,
[Symbol(connect-options)]: [Object]
},
_header: 'POST /v1/node/0a7b04765741d678a0c0ab9657a3ed6e1497a8fa582e0a4f48f8633e3722d604 HTTP/1.1\r\n' +
'Accept: application/json\r\n' +
'Content-Type: application/json\r\n' +
'User-Agent: axios/1.7.2\r\n' +
'Content-Length: 809\r\n' +
'Accept-Encoding: gzip, compress, deflate, br\r\n' +
'Host: api.stackup.sh\r\n' +
'Connection: keep-alive\r\n' +
'\r\n',
_keepAliveTimeout: 0,
_onPendingData: [Function: nop],
agent: Agent {
_events: [Object: null prototype],
_eventsCount: 2,
_maxListeners: undefined,
defaultPort: 443,
protocol: 'https:',
options: [Object: null prototype],
requests: [Object: null prototype] {},
sockets: [Object: null prototype] {},
freeSockets: [Object: null prototype],
keepAliveMsecs: 1000,
keepAlive: true,
maxSockets: Infinity,
maxFreeSockets: 256,
scheduling: 'lifo',
maxTotalSockets: Infinity,
totalSocketCount: 2,
maxCachedSessions: 100,
_sessionCache: [Object],
[Symbol(kCapture)]: false
},
socketPath: undefined,
method: 'POST',
maxHeaderSize: undefined,
insecureHTTPParser: undefined,
joinDuplicateHeaders: undefined,
path: '/v1/node/0a7b04765741d678a0c0ab9657a3ed6e1497a8fa582e0a4f48f8633e3722d604',
_ended: true,
res: IncomingMessage {
_readableState: [ReadableState],
_events: [Object: null prototype],
_eventsCount: 4,
_maxListeners: undefined,
socket: null,
httpVersionMajor: 1,
httpVersionMinor: 1,
httpVersion: '1.1',
complete: true,
rawHeaders: [Array],
rawTrailers: [],
joinDuplicateHeaders: undefined,
aborted: false,
upgrade: false,
url: '',
method: null,
statusCode: 200,
statusMessage: 'OK',
client: [TLSSocket],
_consuming: false,
_dumped: false,
req: [Circular *1],
responseUrl: 'https://api.stackup.sh/v1/node/0a7b04765741d678a0c0ab9657a3ed6e1497a8fa582e0a4f48f8633e3722d604',
redirects: [],
[Symbol(kCapture)]: false,
[Symbol(kHeaders)]: [Object],
[Symbol(kHeadersCount)]: 12,
[Symbol(kTrailers)]: null,
[Symbol(kTrailersCount)]: 0
},
aborted: false,
timeoutCb: null,
upgradeOrConnect: false,
parser: null,
maxHeadersCount: null,
reusedSocket: false,
host: 'api.stackup.sh',
protocol: 'https:',
_redirectable: Writable {
_writableState: [WritableState],
_events: [Object: null prototype],
_eventsCount: 3,
_maxListeners: undefined,
_options: [Object],
_ended: true,
_ending: true,
_redirectCount: 0,
_redirects: [],
_requestBodyLength: 809,
_requestBodyBuffers: [],
_onNativeResponse: [Function (anonymous)],
_currentRequest: [Circular *1],
_currentUrl: 'https://api.stackup.sh/v1/node/0a7b04765741d678a0c0ab9657a3ed6e1497a8fa582e0a4f48f8633e3722d604',
[Symbol(kCapture)]: false
},
[Symbol(kCapture)]: false,
[Symbol(kBytesWritten)]: 0,
[Symbol(kNeedDrain)]: false,
[Symbol(corked)]: 0,
[Symbol(kOutHeaders)]: [Object: null prototype] {
accept: [Array],
'content-type': [Array],
'user-agent': [Array],
'content-length': [Array],
'accept-encoding': [Array],
host: [Array]
},
[Symbol(errored)]: null,
[Symbol(kHighWaterMark)]: 16384,
[Symbol(kRejectNonStandardBodyWrites)]: false,
[Symbol(kUniqueHeaders)]: null
},
data: {
error: { code: -32521, data: null, message: 'execution reverted' },
id: 1,
jsonrpc: '2.0'
}
}
