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• [DIR] ..
• [FILE] index.ts
• [FILE] keyPair.ts
• [FILE] resources.ts
• [FILE] transactionBuilder.ts
• [FILE] transferBuilder.ts
• [FILE] utils.ts
• [FILE] walletUtil.ts

Просмотр файла: keyPair.ts

import { randomBytes } from 'crypto';
import { bip32 } from '@bitgo/secp256k1';
import { addHexPrefix, pubToAddress } from 'ethereumjs-util';
import {
  DefaultKeys,
  isPrivateKey,
  isPublicKey,
  isSeed,
  KeyPairOptions,
  Secp256k1ExtendedKeyPair,
} from '@bitgo/sdk-core';

const DEFAULT_SEED_SIZE_BYTES = 16;

/**
 * Avalanche keys and address management for the C-Chain.
 */
export class KeyPair extends Secp256k1ExtendedKeyPair {
  /**
   * Public constructor. By default, creates a key pair with a random master seed.
   *
   * @param { KeyPairOptions } source Either a master seed, a private key (extended or raw), or a public key
   *     (extended, compressed, or uncompressed)
   */
  constructor(source?: KeyPairOptions) {
    super(source);
    if (!source) {
      const seed = randomBytes(DEFAULT_SEED_SIZE_BYTES);
      this.hdNode = bip32.fromSeed(seed);
    } else if (isSeed(source)) {
      this.hdNode = bip32.fromSeed(source.seed);
    } else if (isPrivateKey(source)) {
      this.recordKeysFromPrivateKey(source.prv);
    } else if (isPublicKey(source)) {
      this.recordKeysFromPublicKey(source.pub);
    } else {
      throw new Error('Invalid key pair options');
    }

    if (this.hdNode) {
      this.keyPair = Secp256k1ExtendedKeyPair.toKeyPair(this.hdNode);
    }
  }

  /**
   * Avalanche C-Chain default keys format is the same as ethereum: raw private and uncompressed public key
   *
   * @returns { DefaultKeys } The keys in the protocol default key format
   */
  getKeys(): DefaultKeys {
    return {
      pub: this.getPublicKey({ compressed: false }).toString('hex').toUpperCase(),
      prv: this.getPrivateKey()?.toString('hex').toUpperCase(),
    };
  }

  /**
   * Get an Avalanche C-Chain public address in ethereum format
   *
   * @returns {string} The address derived from the public key
   */
  getAddress(): string {
    const publicKey = Buffer.from(this.getKeys().pub, 'hex'); // first two characters identify a public key
    return addHexPrefix(pubToAddress(publicKey, true).toString('hex'));
  }
}

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