@mey-sdk-js/crypto v0.3.12

Multi-purpose javascript crypto library for mey

• Documentation

It is used by MeyCoin dApps to manage keys and sign transactions offline.

Features:

• Key generation and importing
• Hashing
• Signing
• Simple AES-GCM encryption

How to use

npm install --save @mey-sdk-js/crypto

Transaction signing

import { createIdentity, signTransaction, hashTransaction } from '@mey-sdk-js/crypto';

async () => {
    const identity = createIdentity();
    const tx = {
        nonce: 1,
        from: identity.address,
        to: identity.address,
        amount: '100 gas',
        payload: '',
    };
    tx.sign = await signTransaction(tx, identity.keyPair);
    tx.hash = await hashTransaction(tx);
    console.log(JSON.stringify(tx));
}()

Arbitrary message signing

import { createIdentity, signMessage, verifySignature, publicKeyFromAddress } from '@mey-sdk-js/crypto';

async () => {
    const identity = createIdentity();
    const msg = Buffer.from('hello');
    const signature = await signMessage(msg, identity.keyPair);
    const pubkey = publicKeyFromAddress(identity.address);
    const check = await verifySignature(msg, pubkey, signature);
    console.log(check);
}()