buildInput function

Implementation

Input buildInput({
  required String txidHex,
  required Set<String> usedUTXO,
  required ElectrumOutput utxo,
  required UTXONetworkType networkType,
}) {
  final vout = utxo.n;
  final txid = Uint8List.fromList(
    hex.decode(txidHex).reversed.toList(),
  ); // Use 'txid' instead of 'hash'

  final prevTxOut = '$txidHex:$vout';

  if (usedUTXO.contains(prevTxOut)) {
    throw const SendFailure("double spend");
  }

  /// Check if utxo has a ScriptSig => Input should also have a ScriptSig
  /// Check if utxo has a WitnessScript => Input should also have a WitnessScript
  ///

  return switch (networkType) {
    BITCOIN_NETWORK() ||
    BITCOINCASH_NETWORK() ||
    ZENIQ_NETWORK() ||
    LITECOIN_NETWORK() =>
      BTCInput(
        txid: txid,
        vout: vout,
        value: utxo.value,
        prevScriptPubKey: utxo.scriptPubKey.lockingScript,
      ),
    EUROCOIN_NETWORK() => EC8Input(
        txid: txid,
        vout: vout,
        value: utxo.value,
        prevScriptPubKey: utxo.scriptPubKey.lockingScript,
      ),
  };
}