Dart Requires Chilkat v11.0.0+

secp256k1 Key Generation and Keccak-256

See more ECC Examples

Starting in v11.0.0, Chilkat supports both secp256k1 key generation and Keccak-256 directly. These algorithms are typically used for Bitcoin and Ethereum. Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // This example requires the Chilkat API to have been previously unlocked.
  // See Global Unlock Sample for sample code.

  // Create a Fortuna PRNG and seed it with system entropy.
  // This will be our source of random data for generating the ECDSA private key.
  final fortuna = CkPrng();
  final entropy = fortuna.getEntropy(32, 'base64');
  fortuna.addEntropy(entropy, 'base64');

  final ecc = CkEcc();

  // Generate a random ECDSA private key on the secp256k1 curve.
  final privKey = CkPrivateKey();
  try {
    ecc.genKey('secp256k1', fortuna, privKey);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print('Successfully generated a sec256k1 key.');

  // Show how to compute the Keccak-256 hash in a few ways.
  final sb = CkStringBuilder();
  sb.append('hello');

  print('keccak-256: ${sb.getHash('keccak-256', 'hex_lower', 'utf-8')}');

  // Output:
  // keccak-256: 1c8aff950685c2ed4bc3174f3472287b56d9517b9c948127319a09a7a36deac8

  // To keccak-256 hash binary data
  final bd = CkBinData();
  bd.appendEncoded('00010203040506', 'hex');

  print('keccak-256: ${bd.getHash('keccak-256', 'hex_lower')}');

  // Output:
  // keccak-256: 801560412425120fa609be232d6fa71c7f64f42aee7977267687dcc0a2f5aa63
}