@smartforge/crypto

Cryptographic utilities for Ethereum signatures and address handling.

Installation

npm install @smartforge/crypto
# or
pnpm add @smartforge/crypto

Usage

import {
  hashMessage,
  verifySignature,
  recoverAddress,
  formatAddress,
  isValidAddress,
} from "@smartforge/crypto";

// Hash a message using EIP-191
const message = "Hello, World!";
const hash = hashMessage(message);

// Verify a signature
const signature = "0x...";
const address = "0x...";
const isValid = verifySignature(message, signature, address);

// Recover address from signature
const recovered = recoverAddress(message, signature);

// Format address with checksum
const checksummed = formatAddress("0x1234...");

// Validate address format
const valid = isValidAddress("0x1234...");

API

hashMessage(message: string): Uint8Array

Hashes a message using EIP-191 standard (Ethereum Signed Message prefix).

verifySignature(message: string, signature: string, address: string): boolean

Verifies that a signature was created by the given address for the message.

recoverAddress(message: string, signature: string): string

Recovers the Ethereum address from a message and signature.

formatAddress(address: string): string

Formats an address with EIP-55 checksum encoding.

isValidAddress(address: string): boolean

Validates that a string is a valid Ethereum address format.

License

ISC