estimateUserOperationGas

Estimate user operation gas for the user operation without building the full user operation request given the user operation calldata.

Usage

import { smartAccountClient } from "./smartAccountClient";

// build single
const gasEstimate = await smartAccountClient.estimateUserOperationGas({
  uo: {
    target: TO_ADDRESS,
    data: ENCODED_DATA,
    value: VALUE, // optional
  },
});
 
console.log(gasEstimate);
 
/**
 * {
 *   preVerificationGas: BigNumberish;
 *   verificationGasLimit: BigNumberish;
 *   callGasLimit: BigNumberish;
 * }
 */

Returns

Promise<UserOperationEstimateGasResponse<EntryPointVersion>

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

Parameters

SendUserOperationParameters

export type SendUserOperationParameters<
  TAccount extends SmartContractAccount | undefined,
  TContext extends UserOperationContext | undefined =
    | UserOperationContext
    | undefined,
  TEntryPointVersion extends GetEntryPointFromAccount<TAccount> = GetEntryPointFromAccount<TAccount>
> = {
  uo: UserOperationCallData | BatchUserOperationCallData;
} & GetAccountParameter<TAccount> &
  GetContextParameter<TContext> &
  UserOperationOverridesParameter<TEntryPointVersion>;

• uo: UserOperationCallData | BatchUserOperationCallData

  UserOperationCallData

  export type UserOperationCallData =
    | {
        /* the target of the call */
        target: Address;
        /* the data passed to the target */
        data: Hex;
        /* the amount of native token to send to the target (default: 0) */
        value?: bigint;
      }
    | Hex;

  • target: Address - the target of the call (equivalent to to in a transaction)
  • data: Hex - can be either 0x or a call data string
  • value?: bigint - optionally, set the value in wei you want to send to the target

• overrides?: UserOperationOverrides

Optional parameter where you can specify override values for maxFeePerGas, maxPriorityFeePerGas, callGasLimit, preVerificationGas, verificationGasLimit, paymasterAndData, or nonceKey for the user operation request. You can also specify a stateOverride to be passed into eth_estimateUserOperationGas during gas estimation.

• account?: TAccount extends SmartContractAccount | undefined

When using this action, if the SmartContractAccount has not been connected to the SmartAccountClient (e.g. SmartAccountClient not instantiated with your SmartContractAccount during createSmartAccountClient). You can check if the account is connected to the client by checking the account field of SmartAccountClient. If the account is not connected, you can specify the SmartContractAccount instance to use for the function call.