viem/account-abstraction/utils/userOperation/getUserOperationTypedData.ts

TypeScript Interface for Ethereum

import type { Address } from 'abitype'

import type { TypedDataDefinition } from '../../../types/typedData.js'
import type { UserOperation } from '../../types/userOperation.js'
import { toPackedUserOperation } from './toPackedUserOperation.js'

export type GetUserOperationTypedDataParameters = {
  chainId: number
  entryPointAddress: Address
  userOperation: UserOperation<'0.8'> | UserOperation<'0.9'>
}

export type GetUserOperationTypedDataReturnType = TypedDataDefinition<
  typeof types,
  'PackedUserOperation'
>

const types = {
  PackedUserOperation: [
    { type: 'address', name: 'sender' },
    { type: 'uint256', name: 'nonce' },
    { type: 'bytes', name: 'initCode' },
    { type: 'bytes', name: 'callData' },
    { type: 'bytes32', name: 'accountGasLimits' },
    { type: 'uint256', name: 'preVerificationGas' },
    { type: 'bytes32', name: 'gasFees' },
    { type: 'bytes', name: 'paymasterAndData' },
  ],
} as const

export function getUserOperationTypedData(
  parameters: GetUserOperationTypedDataParameters,
): GetUserOperationTypedDataReturnType {
  const { chainId, entryPointAddress, userOperation } = parameters

  const packedUserOp = toPackedUserOperation(userOperation, { forHash: true })

  return {
    types,
    primaryType: 'PackedUserOperation',
    domain: {
      name: 'ERC4337',
      version: '1',
      chainId,
      verifyingContract: entryPointAddress,
    },
    message: packedUserOp,
  }
}