diff --git a/lib/services/mixins/paynym_wallet_interface.dart b/lib/services/mixins/paynym_wallet_interface.dart index 774c7c609..4192e7f42 100644 --- a/lib/services/mixins/paynym_wallet_interface.dart +++ b/lib/services/mixins/paynym_wallet_interface.dart @@ -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 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); + } } }