2024-05-05 01:44:50 +00:00
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import 'dart:typed_data';
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import 'package:bitcoin_base/bitcoin_base.dart';
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import 'package:convert/convert.dart';
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2024-12-09 18:23:59 +00:00
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import 'package:cw_core/utils/print_verbose.dart';
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2024-05-05 01:44:50 +00:00
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import 'package:ledger_bitcoin/psbt.dart';
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class PSBTTransactionBuild {
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final PsbtV2 psbt = PsbtV2();
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PSBTTransactionBuild(
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{required List<PSBTReadyUtxoWithAddress> inputs, required List<BitcoinBaseOutput> outputs, bool enableRBF = true}) {
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psbt.setGlobalTxVersion(2);
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psbt.setGlobalInputCount(inputs.length);
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psbt.setGlobalOutputCount(outputs.length);
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for (var i = 0; i < inputs.length; i++) {
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final input = inputs[i];
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2024-12-09 18:23:59 +00:00
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printV(input.utxo.isP2tr());
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printV(input.utxo.isSegwit());
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printV(input.utxo.isP2shSegwit());
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2024-05-05 01:44:50 +00:00
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psbt.setInputPreviousTxId(i, Uint8List.fromList(hex.decode(input.utxo.txHash).reversed.toList()));
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psbt.setInputOutputIndex(i, input.utxo.vout);
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psbt.setInputSequence(i, enableRBF ? 0x1 : 0xffffffff);
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if (input.utxo.isSegwit()) {
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setInputSegwit(i, input);
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} else if (input.utxo.isP2shSegwit()) {
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setInputP2shSegwit(i, input);
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} else if (input.utxo.isP2tr()) {
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// ToDo: (Konsti) Handle Taproot Inputs
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} else {
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setInputP2pkh(i, input);
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}
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}
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for (var i = 0; i < outputs.length; i++) {
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final output = outputs[i];
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if (output is BitcoinOutput) {
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psbt.setOutputScript(i, Uint8List.fromList(output.address.toScriptPubKey().toBytes()));
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psbt.setOutputAmount(i, output.value.toInt());
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}
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}
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}
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void setInputP2pkh(int i, PSBTReadyUtxoWithAddress input) {
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psbt.setInputNonWitnessUtxo(i, Uint8List.fromList(hex.decode(input.rawTx)));
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psbt.setInputBip32Derivation(
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i,
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Uint8List.fromList(hex.decode(input.ownerPublicKey)),
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input.ownerMasterFingerprint,
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BIPPath.fromString(input.ownerDerivationPath).toPathArray());
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}
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void setInputSegwit(int i, PSBTReadyUtxoWithAddress input) {
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psbt.setInputNonWitnessUtxo(i, Uint8List.fromList(hex.decode(input.rawTx)));
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psbt.setInputBip32Derivation(
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i,
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Uint8List.fromList(hex.decode(input.ownerPublicKey)),
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input.ownerMasterFingerprint,
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BIPPath.fromString(input.ownerDerivationPath).toPathArray());
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psbt.setInputWitnessUtxo(i, Uint8List.fromList(bigIntToUint64LE(input.utxo.value)),
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Uint8List.fromList(input.ownerDetails.address.toScriptPubKey().toBytes()));
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}
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void setInputP2shSegwit(int i, PSBTReadyUtxoWithAddress input) {
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psbt.setInputNonWitnessUtxo(i, Uint8List.fromList(hex.decode(input.rawTx)));
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psbt.setInputBip32Derivation(i, Uint8List.fromList(hex.decode(input.ownerPublicKey)),
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input.ownerMasterFingerprint, BIPPath.fromString(input.ownerDerivationPath).toPathArray());
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psbt.setInputRedeemScript(
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i, Uint8List.fromList(input.ownerDetails.address.toScriptPubKey().toBytes()));
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psbt.setInputWitnessUtxo(i, Uint8List.fromList(bigIntToUint64LE(input.utxo.value)),
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Uint8List.fromList(input.ownerDetails.address.toScriptPubKey().toBytes()));
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}
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}
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class PSBTReadyUtxoWithAddress extends UtxoWithAddress {
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final String rawTx;
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final String ownerDerivationPath;
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final Uint8List ownerMasterFingerprint;
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final String ownerPublicKey;
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PSBTReadyUtxoWithAddress({
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required super.utxo,
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required this.rawTx,
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required super.ownerDetails,
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required this.ownerDerivationPath,
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required this.ownerMasterFingerprint,
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required this.ownerPublicKey,
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});
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}
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