decryptPGPKey function

Future<String> decryptPGPKey({ required String encryptedPGPPrivateKey, required Wallet wallet, bool? toUpgrade = false, dynamic additionalMeta, Function? progressHook, })

Implementation

Future<String> decryptPGPKey({
  required String encryptedPGPPrivateKey,
  required Wallet wallet,
  bool? toUpgrade = false,
  dynamic additionalMeta,
  Function? progressHook,
}) async {
  try {
    if (wallet.signer == null && wallet.address == null) {
      throw Exception('At least one from account or signer is necessary!');
    }

    final encryptionType = jsonDecode(encryptedPGPPrivateKey)['version'];
    String? privateKey;

    // Report Progress
    progressHook?.call(PROGRESSHOOK['PUSH-DECRYPT-01']);

    switch (encryptionType) {
      // case Constants.ENC_TYPE_V1:
      //   {}
      case Constants.ENC_TYPE_V2:
        {
          final input = jsonDecode(encryptedPGPPrivateKey)['preKey'];
          final enableProfileMessage = 'Enable Push Chat Profile \n$input';
          List<int> encodedPrivateKey;
          try {
            final secret = (await getEip712Signature(
              wallet,
              enableProfileMessage,
              true,
            ))['verificationProof'];
            encodedPrivateKey = await decryptV2(
              encryptedData: jsonDecode(encryptedPGPPrivateKey),
              secret: hexToBytes(secret ?? ''),
            );
          } catch (err) {
            final secret = (await getEip712Signature(
              wallet,
              enableProfileMessage,
              false,
            ))['verificationProof'];
            encodedPrivateKey = await decryptV2(
              encryptedData: jsonDecode(encryptedPGPPrivateKey),
              secret: hexToBytes(secret ?? ''),
            );
          }
          final dec = utf8.decoder;
          privateKey = dec.convert(encodedPrivateKey);
          break;
        }
      case Constants.ENC_TYPE_V3:
        {
          final input = jsonDecode(encryptedPGPPrivateKey)['preKey'];

          final enableProfileMessage = 'Enable Push Profile \n$input';
          final signed = await getEip191Signature(
            wallet,
            enableProfileMessage,
          );
          final secret = signed['verificationProof'];
          final secretBytes = hexToBytesInternal(secret ?? '');
          // final secretBytes = utf8.encode(secret); //  hexToBytes(secret ?? '');
          final encodedPrivateKey = await decryptV2(
            encryptedData: EncryptedPrivateKeyModel.fromJson(
                jsonDecode(encryptedPGPPrivateKey)),
            secret: secretBytes,
          );
          final dec = utf8.decoder;
          privateKey = dec.convert(encodedPrivateKey);
          break;
        }
      case Constants.ENC_TYPE_V4:
        {
          String? password;
          if (additionalMeta?.containsKey('NFTPGP_V1') == true) {
            password = additionalMeta['NFTPGP_V1']['password'];
          } else {
            final encryptedPassword =
                jsonDecode(encryptedPGPPrivateKey)['encryptedPassword'];
            password = await decryptPGPKey(
              encryptedPGPPrivateKey: jsonEncode(encryptedPassword),
              wallet: wallet,
            );
          }
          final encodedPrivateKey = await decryptV2(
            encryptedData: jsonDecode(encryptedPGPPrivateKey),
            secret: hexToBytes(stringToHex(password ?? '')),
          );
          final dec = utf8.decoder;
          privateKey = dec.convert(encodedPrivateKey);
          break;
        }
      default:
        throw Exception('Invalid Encryption Type');
    }

    // TODO: Add key upgradation logic (not urgent)

    // Report Progress
    progressHook?.call(PROGRESSHOOK['PUSH-DECRYPT-02'] as ProgressHookType);
    return privateKey;
  } catch (err) {
    // Report Progress
    // final errorProgressHook =
    //     PROGRESSHOOK['PUSH-ERROR-00'] as ProgressHookTypeFunction;
    // progressHook?.call(errorProgressHook(['decryptPGPKey', err]));
    throw Exception('[Push SDK] - API - Error - API decryptPGPKey -: $err');
  }
}