r-ecdsa.dart

import 'package:secp256k1cipher/secp256k1cipher.dart';

main() {
  var keyPair = generateKeyPair();

  var privKey = keyPair.privateKey;
  var pubKey = keyPair.publicKey;
  print('Private key: ${strinifyPrivateKey(privKey)}');
  print('Public key: ${strinifyPublicKey(pubKey)}');
  print('Public key length: ${strinifyPublicKey(pubKey).toString().length}');

  var msg = {'amount': 200, 'recipient': "john", 'sender': "joe"};
  var msg2 = json.encode(msg);

  var encMap = pubkeyEncrypt(
      strinifyPrivateKey(keyPair.privateKey),
      strinifyPublicKey(keyPair.publicKey),
      msg2); // use alic's privatekey and bob's publickey means alic say to bob

  var encStr = encMap['enc']; // Get encrypted base64 string
  var iv = encMap['iv'];
  var str = '';
  base64Decode(encStr).forEach((v) => str += '$v,');
  print(str);
  var decryptd = privateDecrypt(
      strinifyPrivateKey(privKey), strinifyPublicKey(pubKey), encStr, iv);

  print('Msg: $decryptd');
}