Error.getSelector

Compute the 4-byte selector for a custom error

Overview

Error.getSelector returns the first 4 bytes of the keccak256 hash of the error signature.

Quick Start

import { Abi } from '@tevm/voltaire/Abi';
import { Hex } from '@tevm/voltaire/Hex';

const InsufficientBalance = {
  type: 'error',
  name: 'InsufficientBalance',
  inputs: [
    { type: 'uint256', name: 'balance' },
    { type: 'uint256', name: 'required' }
  ]
} as const;

const selector = Abi.Error.getSelector(InsufficientBalance);
const selectorHex = Hex.fromBytes(selector);

Notes

• Uses canonical types for signatures (e.g. uint256).
• Error selectors are 4 bytes, like function selectors.

See Also

• getSignature - Error signature string
• Selectors - Selector rules