viem
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JavaScript
import { parseAccount, } from '../../../accounts/utils/parseAccount.js';
import { AccountNotFoundError } from '../../../errors/account.js';
import { getAction } from '../../../utils/getAction.js';
import { getUserOperationError } from '../../utils/errors/getUserOperationError.js';
import { formatUserOperationGas, } from '../../utils/formatters/userOperationGas.js';
import { formatUserOperationRequest, } from '../../utils/formatters/userOperationRequest.js';
import { prepareUserOperation, } from './prepareUserOperation.js';
/**
* Returns an estimate of gas values necessary to execute the User Operation.
*
* - Docs: https://viem.sh/actions/bundler/estimateUserOperationGas
*
* @param client - Client to use
* @param parameters - {@link EstimateUserOperationGasParameters}
* @returns The gas estimate (in wei). {@link EstimateUserOperationGasReturnType}
*
* @example
* import { createBundlerClient, http, parseEther } from 'viem'
* import { toSmartAccount } from 'viem/accounts'
* import { mainnet } from 'viem/chains'
* import { estimateUserOperationGas } from 'viem/actions'
*
* const account = await toSmartAccount({ ... })
*
* const bundlerClient = createBundlerClient({
* chain: mainnet,
* transport: http(),
* })
*
* const values = await estimateUserOperationGas(bundlerClient, {
* account,
* calls: [{ to: '0x...', value: parseEther('1') }],
* })
*/
export async function estimateUserOperationGas(client, parameters) {
const { account: account_ = client.account } = parameters;
if (!account_)
throw new AccountNotFoundError();
const account = parseAccount(account_);
const request = await getAction(client, prepareUserOperation, 'prepareUserOperation')({
...parameters,
parameters: ['factory', 'nonce', 'paymaster', 'signature'],
});
try {
const result = await client.request({
method: 'eth_estimateUserOperationGas',
params: [
formatUserOperationRequest(request),
account.entryPoint.address,
],
});
return formatUserOperationGas(result);
}
catch (error) {
throw getUserOperationError(error, {
...request,
calls: parameters.calls,
});
}
}
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