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Merge pull request #367 from cypherstack/staging

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Blind fix Paynym
This commit is contained in:
Diego Salazar 2023-02-24 19:52:21 -07:00 committed by GitHub
commit 224aa7ce64
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1 changed files with 82 additions and 1 deletions
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83
lib/services/mixins/paynym_wallet_interface.dart
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@ -605,7 +605,7 @@ mixin PaynymWalletInterface {
final myCode = await getPaymentCode(DerivePathType.bip44);
final utxo = utxosToUse.first;
final txPoint = utxo.txid.fromHex.toList();
final txPoint = utxo.txid.fromHex.reversed.toList();
final txPointIndex = utxo.vout;
final rev = Uint8List(txPoint.length + 4);
@ -786,6 +786,18 @@ mixin PaynymWalletInterface {
// await _setConnectedCache(paymentCodeString, true);
return true;
}
final unBlindedPaymentCodeBad =
await unBlindedPaymentCodeFromTransactionBad(
transaction: tx,
myNotificationAddress: myNotificationAddress,
);
if (unBlindedPaymentCodeBad != null &&
paymentCodeString == unBlindedPaymentCodeBad.toString()) {
// await _setConnectedCache(paymentCodeString, true);
return true;
}
} else if (tx.type == TransactionType.outgoing) {
if (tx.address.value?.otherData != null) {
final code =
@ -830,6 +842,64 @@ mixin PaynymWalletInterface {
return null;
}
try {
final blindedCodeBytes =
Bip47Utils.getBlindedPaymentCodeBytesFrom(transaction);
// transaction does not contain a payment code
if (blindedCodeBytes == null) {
return null;
}
final designatedInput = transaction.inputs.first;
final txPoint = designatedInput.txid.fromHex.reversed.toList();
final txPointIndex = designatedInput.vout;
final rev = Uint8List(txPoint.length + 4);
Util.copyBytes(Uint8List.fromList(txPoint), 0, rev, 0, txPoint.length);
final buffer = rev.buffer.asByteData();
buffer.setUint32(txPoint.length, txPointIndex, Endian.little);
final pubKey = _pubKeyFromInput(designatedInput)!;
final myPrivateKey = (await deriveNotificationBip32Node(
mnemonic: (await _getMnemonicString())!,
mnemonicPassphrase: (await _getMnemonicPassphrase())!,
))
.privateKey!;
final S = SecretPoint(myPrivateKey, pubKey);
final mask = PaymentCode.getMask(S.ecdhSecret(), rev);
final unBlindedPayload = PaymentCode.blind(
payload: blindedCodeBytes,
mask: mask,
unBlind: true,
);
final unBlindedPaymentCode = PaymentCode.fromPayload(unBlindedPayload);
return unBlindedPaymentCode;
} catch (e) {
Logging.instance.log(
"unBlindedPaymentCodeFromTransaction() failed: $e",
level: LogLevel.Warning,
);
return null;
}
}
Future<PaymentCode?> unBlindedPaymentCodeFromTransactionBad({
required Transaction transaction,
required Address myNotificationAddress,
}) async {
if (transaction.address.value != null &&
transaction.address.value!.value != myNotificationAddress.value) {
return null;
}
try {
final blindedCodeBytes =
Bip47Utils.getBlindedPaymentCodeBytesFrom(transaction);
@ -911,6 +981,17 @@ mixin PaynymWalletInterface {
codes.where((e) => e.toString() == unBlinded.toString()).isEmpty) {
codes.add(unBlinded);
}
final unBlindedBad = await unBlindedPaymentCodeFromTransactionBad(
transaction: tx,
myNotificationAddress: myAddress,
);
if (unBlindedBad != null &&
codes
.where((e) => e.toString() == unBlindedBad.toString())
.isEmpty) {
codes.add(unBlindedBad);
}
}
}