Boosted Paymaster

The Boosted paymaster is a offchain paymaster that offers faster execution times and cheaper gas fees due to requiring less RPC calls and requiring no paymaster data.

How to send a Boosted UserOperation

To send a Boosted userOperation, you only need to:

Set maxFeePerGas and maxPriorityFeePerGas to zero
Remove paymaster and paymasterData fields

You won't need to make any changes to your application logic as the boosted userOperation is sent using the standard eth_sendUserOperation endpoint.

In the background, Pimlico will calculate the userOperation cost offchain based on the userOperations's gasUsed and the bundler's gasPrice.

Code Example

import { createSmartAccountClient } from "permissionless"
import { toSimpleSmartAccount } from "permissionless/accounts"
import { http, createPublicClient, zeroAddress } from "viem"
import { generatePrivateKey, privateKeyToAccount } from "viem/accounts"
import { sepolia } from "viem/chains"
 
const apiKey = "YOUR_PIMLICO_API_KEY"
const pimlicoUrl = `https://api.pimlico.io/v2/${chain.id}/rpc?apikey=${apiKey}`
 
const publicClient = createPublicClient({
    chain: sepolia,
    transport: http()
})
 
const account = await toSimpleSmartAccount({
    owner: privateKeyToAccount(generatePrivateKey()),
    client: publicClient
})
 
const pimlicoClient = createPimlicoClient({ 
    chain: sepolia, 
    transport: http(pimlicoUrl), 
    entryPoint 
}) 
 
const smartAccount = createSmartAccountClient({
    bundlerTransport: http(pimlicoUrl),
    paymaster: pimlicoClient, 
    account,
    chain: sepolia,
    userOperation: { 
        estimateFeesPerGas: async () => { 
            return { 
                maxFeePerGas: 0n, 
                maxPriorityFeePerGas: 0n
            } 
        } 
    } 
})
 
// Send a mock transaction
const tx = await smartAccount.sendTransaction({
    to: zeroAddress,
    value: 0n
})
 
console.log(`Transaction included: https://sepolia.etherscan.io/tx/${tx}`)

Further optimizations

For maximum performance, hardcode your gas limits if you know your userOperation's gas usage. This eliminates the gas estimation RPC call, reducing your entire transaction to a single eth_sendUserOperation request.

...
 
// Send a mock transaction with hardcoded gasLimits
const tx = await smartAccount.sendTransaction({
    to: zeroAddress,
    value: 0n,
    callGasLimit: 250_000n,
    verificationGasLimit: 250_000n,
    preVerificationGas: 0n
})