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modify bip47 utils

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This commit is contained in:
julian 2023-01-31 16:21:09 -06:00
parent 6a0673bec5
commit a25c03cb5c
1 changed files with 20 additions and 10 deletions

30
lib/utilities/bip47_utils.dart
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@ -1,24 +1,34 @@
import 'dart:typed_data'; import 'dart:typed_data';
import 'package:bip47/src/util.dart'; import 'package:bip47/src/util.dart';
import 'package:stackwallet/models/isar/models/blockchain_data/output.dart';
import 'package:stackwallet/models/isar/models/blockchain_data/transaction.dart'; import 'package:stackwallet/models/isar/models/blockchain_data/transaction.dart';
abstract class Bip47Utils { abstract class Bip47Utils {
/// looks at tx outputs and returns a blinded payment code if found /// looks at tx outputs and returns a blinded payment code if found
static Uint8List? getBlindedPaymentCodeBytesFrom(Transaction transaction) { static Uint8List? getBlindedPaymentCodeBytesFrom(Transaction transaction) {
for (int i = 0; i < transaction.outputs.length; i++) {
final bytes = getBlindedPaymentCodeBytesFromOutput(
transaction.outputs.elementAt(i));
if (bytes != null) {
return bytes;
}
}
return null;
}
static Uint8List? getBlindedPaymentCodeBytesFromOutput(Output output) {
Uint8List? blindedCodeBytes; Uint8List? blindedCodeBytes;
for (int i = 0; i < transaction.outputs.length; i++) { List<String>? scriptChunks = output.scriptPubKeyAsm?.split(" ");
List<String>? scriptChunks = if (scriptChunks?.length == 2 && scriptChunks?[0] == "OP_RETURN") {
transaction.outputs.elementAt(i).scriptPubKeyAsm?.split(" "); final blindedPaymentCode = scriptChunks![1];
if (scriptChunks?.length == 2 && scriptChunks?[0] == "OP_RETURN") { final bytes = blindedPaymentCode.fromHex;
final blindedPaymentCode = scriptChunks![1];
final bytes = blindedPaymentCode.fromHex;
// https://en.bitcoin.it/wiki/BIP_0047#Sending // https://en.bitcoin.it/wiki/BIP_0047#Sending
if (bytes.length == 80 && bytes.first == 1) { if (bytes.length == 80 && bytes.first == 1) {
blindedCodeBytes = bytes; blindedCodeBytes = bytes;
}
} }
} }