alchemyFeeEstimator

alchemyFeeEstimator is a middleware method you can use to easily leverage Rundler (an EIP-4337 Bundler) for estimating gas fees for user operations.

Usage

example.ts

import {
  alchemyFeeEstimator,
  createAlchemyRpcClient,
} from "@alchemy/aa-alchemy";
import { createSmartAccountClient } from "@alchemy/aa-core";
import { http } from "viem";
import { sepolia } from "viem/chains";

const alchemyClient = createAlchemyRpcClient({
  transport: http("ALCHEMY_RPC_URL"),
  chain: sepolia,
});

// use Alchemy Gas Fee Estimator to estimate gas fees according to the expectations of Rundler.
const clientWithGasFeeEstimator = createSmartAccountClient({
  ...config,
  feeEstimator: alchemyFeeEstimator(alchemyClient),
});

Returns

ClientMiddlewareFn

A ClientMiddlewareFn that will estimate fees using the Rundler.

Parameters

client: ClientWithAlchemyMethods -- an PublicClient that is connected to Alchemy's RPC