Crypto Library Guide

The @hiero-did-sdk/crypto package provides a simple utility class Crypto for calculating SHA-256 hashes. It supports multiple input types and works seamlessly in both Node.js and React Native environments by automatically selecting the appropriate crypto backend.

Overview

Use the Crypto library to:

  • Compute SHA-256 hashes of data inputs (string, Buffer, Uint8Array, ArrayBuffer).

  • Automatically select the compatible crypto module depending on the runtime environment.

  • Obtain hexadecimal string hashes for use in decentralized identity and cryptographic operations.

Initialization

No explicit initialization is required. The library detects and uses the appropriate crypto module internally when hashing.

Basic Usage

import { Crypto } from '@hiero-did-sdk/crypto';

const input = 'Hello, World!';

const hashHex = Crypto.sha256(input);

console.log('SHA-256 hash:', hashHex);

Parameters:

  • input (string | Buffer | Uint8Array | ArrayBuffer) — data to hash.

Returns:

  • string — hex-encoded SHA-256 hash.

Throws an error if no compatible crypto module is found during runtime.

See Also

Crypto API Reference