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estimateUserOperationGas ​

Calls eth_estimateUserOperationGas and returns the result.

Note

It is recommended to use estimateUserOperationGas SmartAccountClientAction for user operation gas estimation. The smart account client action provides much simpler interface than directly calling the raw bundler actions.

Usage ​

ts
import { client } from "./client";

const estimates = await client.estimateUserOperationGas(
  {
    // ... user operation request with account dummySignature,
    // initCode, encoded user operation call data, sender address, etc.
  },
  "0xEntryPointAddress"
);
ts
import { createBundlerClient, mainnet } from "@alchemy/aa-core";
import { http } from "viem";

export const client = createBundlerClient({
  chain: mainnet,
  transport: http("https://eth-mainnet.g.alchemy.com/v2/demo"),
});

Returns ​

Promise<UserOperationEstimateGasResponse> ​

The result of the estimate including the callGasLimit, verificationGasLimit, preVerificationGas, and additionally, paymasterVerificationGasLimit for EntryPointVersion v0.7.0 user operations.

Parameters ​

request: UserOperationRequest ​

The user operation to estimate the gas for sending the user oepration.

entryPoint: Address ​

The address of the entry point to send the user operation to

stateOverride?: StateOverride ​

A type defining state overrides for eth_call method. An optional address-to-state mapping, where each entry specifies some state to be ephemerally overridden prior to executing the call. State overrides allow you to customize the network state for the purpose of the simulation, so this feature is useful when you need to estimate gas for user operation scenarios under conditions that aren’t currently present on the live network.