28 lines
958 B
JavaScript
28 lines
958 B
JavaScript
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import base58 from 'bs58';
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import nacl from 'tweetnacl';
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import sha3 from 'js-sha3';
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/**
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* @class Keypair Ed25519 keypair in base58 (as BigchainDB expects base58 keys)
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* @type {Object}
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* @param {number} secret A seed that will be used as a key derivation function
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* @property {string} publicKey
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* @property {string} privateKey
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*/
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export default function Ed25519Keypair(secret) {
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let keyPair;
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if (secret) {
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// Quick and dirty: use key derivation function instead
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const secretHash = sha3.sha3_256
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.create()
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.update(secret)
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.array();
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keyPair = nacl.sign.keyPair.fromSeed(new Uint8Array(secretHash))
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} else {
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keyPair = nacl.sign.keyPair();
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}
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this.publicKey = base58.encode(keyPair.publicKey);
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// tweetnacl's generated secret key is the secret key + public key (resulting in a 64-byte buffer)
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this.privateKey = base58.encode(keyPair.secretKey.slice(0, 32));
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}
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