viem/utils/ens/errors.ts

TypeScript Interface for Ethereum

import { BaseError } from '../../errors/base.js'
import { ContractFunctionRevertedError } from '../../errors/contract.js'
import type { ErrorType } from '../../errors/utils.js'

/** @internal */
export type IsNullUniversalResolverErrorErrorType = ErrorType

/*
 * @description Checks if error is a valid null result UniversalResolver error
 */
export function isNullUniversalResolverError(err: unknown): boolean {
  if (!(err instanceof BaseError)) return false
  const cause = err.walk((e) => e instanceof ContractFunctionRevertedError)
  if (!(cause instanceof ContractFunctionRevertedError)) return false

  if (cause.data?.errorName === 'HttpError') return true
  if (cause.data?.errorName === 'ResolverError') return true
  if (cause.data?.errorName === 'ResolverNotContract') return true
  if (cause.data?.errorName === 'ResolverNotFound') return true
  if (cause.data?.errorName === 'ReverseAddressMismatch') return true
  if (cause.data?.errorName === 'UnsupportedResolverProfile') return true

  return false
}