getGasFeeValues

The getGasFeeValues function returns live gas prices that can be used to send a user operation. It provides different gas price tiers (slow, standard, and fast) with corresponding maxFeePerGas and maxPriorityFeePerGas values for each tier.

Usage

import { createBicoBundlerClient } from "@biconomy/abstractjs";
import { http } from "viem";
 
const bicoBundlerClient = createBicoBundlerClient({
  bundlerUrl: "https://bundler.biconomy.io/api/v3/5/your-api-key",
  account: nexusAccount
});
 
const gasFees = await bicoBundlerClient.getGasFeeValues();

Return Value

The function returns a promise that resolves to an object containing gas fee suggestions for different speed tiers:

type GetGasFeeValuesReturnType = {
  slow: {
    maxFeePerGas: bigint
    maxPriorityFeePerGas: bigint
  }
  standard: {
    maxFeePerGas: bigint
    maxPriorityFeePerGas: bigint
  }
  fast: {
    maxFeePerGas: bigint
    maxPriorityFeePerGas: bigint
  }
}

Example

import { http } from "viem";
import { createBicoBundlerClient, toNexusAccount } from "@biconomy/abstractjs";
import { baseSepolia } from "viem/chains";
import { privateKeyToAccount } from "viem/accounts";
 
// Set up your account and bundler client
const privateKey = "YOUR_PRIVATE_KEY";
const account = privateKeyToAccount(`0x${privateKey}`);
const bundlerUrl = "https://bundler.biconomy.io/api/v3/84532/your-api-key";
 
// Create Nexus account
const nexusAccount = await toNexusAccount({
  signer: account,
  chain: baseSepolia,
  transport: http(),
});
 
// Create bundler client
const bicoBundler = createBicoBundlerClient({
  bundlerUrl,
  account: nexusAccount
});
 
// Get gas fee values
const gasFees = await bicoBundler.getGasFeeValues();
console.log("Fast gas fees:", gasFees.fast);
console.log("Standard gas fees:", gasFees.standard);
console.log("Slow gas fees:", gasFees.slow);
 
// Use these values in a transaction
const calls = [{ to: recipientAddress, value: 1n }];
const hash = await bicoBundler.sendUserOperation({
  maxFeePerGas: gasFees.standard.maxFeePerGas,
  maxPriorityFeePerGas: gasFees.standard.maxPriorityFeePerGas,
  calls,
  account: nexusAccount
});

Implementation Details

The function works by checking if the client is using Pimlico or Biconomy's bundler and calls the appropriate RPC method:

For Pimlico: pimlico_getUserOperationGasPrice
For Biconomy: biconomy_getGasFeeValues

The returned hex values are then converted to BigInt for use in your user operations.