Updated on 2026-08-14

.idea/kotlinc.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Kotlin2JsCompilerArguments">
+    <option name="sourceMapEmbedSources" />
+  </component>
+</project>

app/src/main/java/com/tangem/data/network/ServerApiElectrum.java

@@ -124,11 +124,16 @@ public class ServerApiElectrum {
             BitcoinCashNode bitcoinCashNode = BitcoinCashNode.values()[new Random().nextInt(BitcoinCashNode.values().length)];
             host = bitcoinCashNode.getHost();
             port = bitcoinCashNode.getPort();
+            proto = bitcoinCashNode.getProto();
 
             this.host = host;
             this.port = port;
 
-            return doElectrumRequestTcp(electrumRequest, host, port);
+            if (proto.equals("tcp")) {
+                return doElectrumRequestTcp(electrumRequest, host, port);
+            } else {
+                return doElectrumRequestSsl(electrumRequest, host, port);
+            }
 
         } else if (card.getBlockchain() == Blockchain.Bitcoin) {
             BitcoinNode bitcoinNode = BitcoinNode.values()[new Random().nextInt(BitcoinNode.values().length)];
@@ -136,15 +141,12 @@ public class ServerApiElectrum {
             port = bitcoinNode.getPort();
             proto = bitcoinNode.getProto();
 
-            if (proto.equals("tcp")) {
+            this.host = host;
-                this.host = host;
+            this.port = port;
-                this.port = port;
 
+            if (proto.equals("tcp")) {
                 return doElectrumRequestTcp(electrumRequest, host, port);
             } else {
-                this.host = host;
-                this.port = port;
-
                 return doElectrumRequestSsl(electrumRequest, host, port);
             }
         }

app/src/main/java/com/tangem/domain/wallet/BCHUtils.java

@@ -0,0 +1,345 @@
+package com.tangem.domain.wallet;
+
+/**
+ * Created by Ilia on 29.09.2017.
+ */
+
+import android.util.Log;
+
+import com.tangem.domain.wallet.btc.BitcoinException;
+import com.tangem.domain.wallet.btc.BitcoinOutputStream;
+import com.tangem.domain.wallet.btc.BtcData;
+import com.tangem.util.CryptoUtil;
+import com.tangem.util.FormatUtil;
+import com.tangem.tangemcard.util.Util;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.math.BigInteger;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+@SuppressWarnings({"WeakerAccess", "TryWithIdenticalCatches", "unused"})
+public final class BCHUtils {
+    static final BigInteger LARGEST_PRIVATE_KEY = new BigInteger("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141", 16);//SECP256K1_N
+    public static final long MIN_FEE_PER_KB = 10000;
+    public static final long MAX_ALLOWED_FEE = FormatUtil.parseValue("0.1");
+    public static final long MIN_PRIORITY_FOR_NO_FEE = 57600000;
+    public static final long MIN_MIN_OUTPUT_VALUE_FOR_NO_FEE = 10000000L;
+    public static final int MAX_TX_LEN_FOR_NO_FEE = 10000;
+    public static final float EXPECTED_BLOCKS_PER_DAY = 144.0f;//(expected confirmations per day)
+
+    public static String toHex(byte[] bytes) {
+        if (bytes == null) {
+            return "";
+        }
+        final char[] hexArray = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};
+        char[] hexChars = new char[bytes.length * 2];
+        int v;
+        for (int j = 0; j < bytes.length; j++) {
+            v = bytes[j] & 0xFF;
+            hexChars[j * 2] = hexArray[v >>> 4];
+            hexChars[j * 2 + 1] = hexArray[v & 0x0F];
+        }
+        return new String(hexChars);
+    }
+
+    public static byte[] buildTXForSign(String myAddress, String outputAddress, String changeAddress, ArrayList<UnspentOutputInfo> unspentOutputs, int currentInputPos, long amount, long change) throws BitcoinException, IOException {
+
+        int inputPos = currentInputPos;
+        byte[] tx = buildPreimage(outputAddress, changeAddress, unspentOutputs, inputPos, amount, change);
+        return tx;
+    }
+
+    public static byte[] buildTXForSend(String outputAddress, String changeAddress, ArrayList<UnspentOutputInfo> unspentOutputs, long amount, long change) throws BitcoinException, IOException {
+
+        int inputPos = -1;
+        byte[] tx = buildBodyTX(outputAddress, changeAddress, unspentOutputs, inputPos, amount, change);
+        return tx;
+    }
+
+    //BIP 143 as reference + script length added
+    public static byte[] buildPreimage(String outputAddress, String changeAddress, ArrayList<UnspentOutputInfo> unspentOutputs, int inputPos, long amount, long change) throws BitcoinException, IOException {
+
+        //nVersion of the transaction (4-byte little endian)
+        BitcoinOutputStream forSign = new BitcoinOutputStream();
+        //forSign.writeInt32(0x01);
+        forSign.write(new byte[]{0x02, 0x00, 0x00, 0x00}); // version
+
+        //inputCount
+        byte inputCount = (byte) unspentOutputs.size();
+
+        //hashPrevouts (32-byte hash)
+        ByteArrayOutputStream prevouts = new ByteArrayOutputStream();
+        for (int i = 0; i < inputCount; ++i) {
+            UnspentOutputInfo outPut = unspentOutputs.get(i);
+            byte[] txHash = BCHUtils.reverse(Util.hexToBytes(outPut.txHashForBuild));//Little-endian txID
+            byte[] txIndex = BCHUtils.reverse(Util.intToByteArray4(outPut.outputIndex));//Little-endian outputIndex
+            prevouts.write(txHash);
+            prevouts.write(txIndex);
+        }
+        byte[] hashPrevouts = CryptoUtil.doubleSha256(prevouts.toByteArray());
+        forSign.write(hashPrevouts);
+
+        //hashSequence (32-byte hash), ffffffff only
+        ByteArrayOutputStream sequences = new ByteArrayOutputStream();
+        for (int i = 0; i < inputCount; ++i) {
+            sequences.write(new byte[]{(byte) 0xff, (byte) 0xff, (byte) 0xff, (byte) 0xff});
+        }
+        byte[] hashSequence = CryptoUtil.doubleSha256(sequences.toByteArray());
+        forSign.write(hashSequence);
+
+        //outpoint (32-byte hash + 4-byte little endian)
+        UnspentOutputInfo outPut = unspentOutputs.get(inputPos);
+        byte[] txHash = BCHUtils.reverse(Util.hexToBytes(outPut.txHashForBuild));//Little-endian txID
+        byte[] txIndex = BCHUtils.reverse(Util.intToByteArray4(outPut.outputIndex));//Little-endian outputIndex
+        forSign.write(txHash);
+        forSign.write(txIndex);
+
+        //scriptCode of the input (serialized as scripts inside CTxOuts)
+        byte[] scriptCode = Transaction.Script.buildOutput(changeAddress).bytes; //build change out
+        byte[] scriptLength = Util.intToByteArray(scriptCode.length);
+        forSign.write(scriptLength);
+        forSign.write(scriptCode);
+
+        //value of the output spent by this input (8-byte little endian)
+        byte[] outValue = BCHUtils.reverse(Util.longToByteArray8(outPut.value));
+        forSign.write(outValue);
+
+        //nSequence of the input (4-byte little endian), ffffffff only
+        forSign.write(new byte[]{(byte) 0xff, (byte) 0xff, (byte) 0xff, (byte) 0xff});
+
+        //hashOutputs (32-byte hash)
+        ByteArrayOutputStream outputs = new ByteArrayOutputStream();
+        byte[] sendAmount = BCHUtils.reverse(Util.longToByteArray8(amount));
+        byte[] sendScript = Transaction.Script.buildOutput(outputAddress).bytes; // build out
+        byte[] sendLength = Util.intToByteArray(sendScript.length);
+        outputs.write(sendAmount);
+        outputs.write(sendLength);
+        outputs.write(sendScript);
+        //output for change (if any)
+        if (change != 0) {
+            byte[] changeAmount = BCHUtils.reverse(Util.longToByteArray8(change));
+            byte[] changeScript = Transaction.Script.buildOutput(changeAddress).bytes; //build change out
+            byte[] changeLength = Util.intToByteArray(changeScript.length);
+            outputs.write(changeAmount);
+            outputs.write(changeLength);
+            outputs.write(changeScript);
+        }
+        byte[] hashOutputs = CryptoUtil.doubleSha256(outputs.toByteArray());
+        forSign.write(hashOutputs);
+
+        //nLocktime of the transaction (4-byte little endian)
+        forSign.write(new byte[]{0x00, 0x00, 0x00, 0x00});
+
+        //sighash type of the signature (4-byte little endian)
+        forSign.write(new byte[]{0x41, 0x00, 0x00, 0x00});
+
+        byte[] rawData = forSign.toByteArray();
+
+        Log.e("Sign_TX_Body", BCHUtils.toHex(rawData));
+
+        return rawData;
+
+    }
+    public static byte[] buildBodyTX(String outputAddress, String changeAddress, ArrayList<UnspentOutputInfo> unspentOutputs, int inputPos, long amount, long change) throws BitcoinException, IOException {
+
+        //0200000000
+        BitcoinOutputStream forSign = new BitcoinOutputStream();
+        //forSign.writeInt32(0x01);
+        forSign.write(new byte[]{0x02, 0x00, 0x00, 0x00}); // version
+
+        //01
+        byte inputCount = (byte) unspentOutputs.size();
+        forSign.write(inputCount); // input count
+        //hex str hash prev btc
+
+        for (int i = 0; i < inputCount; ++i) {
+            UnspentOutputInfo outPut = unspentOutputs.get(i);
+            int outputIndex = outPut.outputIndex;
+            byte[] txHash = BCHUtils.reverse(Util.hexToBytes(outPut.txHashForBuild));//Sha256Hash.hash(rawTxByte);
+            forSign.write(txHash);
+            forSign.writeInt32(outputIndex); //output index in prev tx
+            if (inputPos == -1 || i == inputPos) {
+                // hex str 1976a914....88ac
+                forSign.write((byte) outPut.scriptForBuild.length);
+                forSign.write(outPut.scriptForBuild);
+            } else {
+                forSign.write(0x00);
+            }
+            //ffffffff
+            forSign.write(new byte[]{(byte) 0xff, (byte) 0xff, (byte) 0xff, (byte) 0xff}); // sequence
+        }
+
+
+        //02
+        byte outputCount = (byte) ((change == 0) ? 1 : 2); // outputCount
+        forSign.write(outputCount);
+
+        //8 bytes
+
+        forSign.writeInt64(amount); //amount
+        byte[] sendScript = Transaction.Script.buildOutput(outputAddress).bytes; // build out
+        //hex str 1976a914....88ac
+        forSign.write((byte) sendScript.length);
+        forSign.write(sendScript);
+
+        if (change != 0) {
+            //8 bytes
+            forSign.writeInt64(change); // change
+            //hex str 1976a914....88ac
+            byte[] chancheScript = Transaction.Script.buildOutput(changeAddress).bytes; //build out
+            forSign.write((byte) chancheScript.length);
+            forSign.write(chancheScript);
+
+        }
+
+        //00000000
+        forSign.write(new byte[]{0x00, 0x00, 0x00, 0x00});
+
+        //forSign.write(new byte[]{0x01, 0x00, 0x00, 0x00});
+
+        byte[] rawData = forSign.toByteArray();
+
+        Log.e("Sign_TX_Body", BCHUtils.toHex(rawData));
+
+        return rawData;
+    }
+
+    public static byte[] buildBodyTX(String outputAddress, String changeAddress, int outputIndex, String prevID, long amount, long change, byte[] script) throws BitcoinException, IOException {
+
+        //0200000000
+        BitcoinOutputStream forSign = new BitcoinOutputStream();
+        forSign.writeInt32(0x01);//write(new byte[]{0x02, 0x00, 0x00, 0x00}); // version
+
+        //01
+        byte inputCount = 1;
+        forSign.write(inputCount); // input count
+        //hex str hash prev btc
+        byte[] txHash = BCHUtils.reverse(Util.hexToBytes(prevID));//Sha256Hash.hash(rawTxByte);
+        forSign.write(txHash); //previos tx hash
+
+        //00000000
+        //byte indexOutput = outputIndex;
+        forSign.writeInt32(outputIndex/*indexOutput*/); //output index in prev tx
+        //forSign.write(0x00);
+
+        // hex str 1976a914....88ac
+        forSign.write((byte) script.length);
+        forSign.write(script);
+
+        //ffffffff
+        forSign.write(new byte[]{(byte) 0xff, (byte) 0xff, (byte) 0xff, (byte) 0xff}); // sequence
+
+        //02
+        byte outputCount = (byte) ((change == 0) ? 1 : 2); // outputCount
+        forSign.write(outputCount);
+
+        //8 bytes
+
+        forSign.writeInt64(amount); //amount
+        byte[] sendScript = Transaction.Script.buildOutput(outputAddress).bytes; // build out
+        //hex str 1976a914....88ac
+        forSign.write((byte) sendScript.length);
+        forSign.write(sendScript);
+
+        if (change != 0) {
+            //8 bytes
+            forSign.writeInt64(change); // change
+            //hex str 1976a914....88ac
+            byte[] chancheScript = Transaction.Script.buildOutput(changeAddress).bytes; //build out
+            forSign.write((byte) chancheScript.length);
+            forSign.write(chancheScript);
+
+        }
+
+        //00000000
+        forSign.write(new byte[]{0x00, 0x00, 0x00, 0x00});
+
+        byte[] rawData = forSign.toByteArray();
+
+        //Log.e("Sign_TX_Body", BCHUtils.toHex(rawData));
+        return rawData;
+    }
+
+    public static ArrayList<UnspentOutputInfo> getOutputs(List<BtcData.UnspentTransaction> rawTxList, byte[] outputScriptWeAreAbleToSpend) throws BitcoinException {
+        ArrayList<UnspentOutputInfo> unspentOutputs = new ArrayList<>();
+
+        for (BtcData.UnspentTransaction current : rawTxList) {
+            byte[] rawTxByte = BCHUtils.fromHex(current.Raw);
+            if (rawTxByte == null || current.Raw.isEmpty()) {
+                continue;
+            }
+
+            Transaction baseTx = new Transaction(rawTxByte);
+
+            if (baseTx.inputs.length == 0 || baseTx.outputs.length == 0)
+                throw new IllegalArgumentException("Unable to decode given transaction");
+
+            byte[] txHash = BCHUtils.reverse(CryptoUtil.doubleSha256(rawTxByte));
+            String txHashForBuild = current.txID;
+            byte[] sign = null;
+
+            for (int outputIndex = 0; outputIndex < baseTx.outputs.length; outputIndex++) {
+                Transaction.Output output = baseTx.outputs[outputIndex];
+
+                // find outputs
+                if (Arrays.equals(outputScriptWeAreAbleToSpend, output.script.bytes)) {
+                    unspentOutputs.add(new UnspentOutputInfo(txHash, output.script, output.value, outputIndex, -1, txHashForBuild, sign));
+                }
+            }
+
+        }
+
+        return unspentOutputs;
+    }
+
+    public static byte[] fromHex(String s) {
+        if (s != null) {
+            try {
+                StringBuilder sb = new StringBuilder(s.length());
+                for (int i = 0; i < s.length(); i++) {
+                    char ch = s.charAt(i);
+                    if (!Character.isWhitespace(ch)) {
+                        sb.append(ch);
+                    }
+                }
+                s = sb.toString();
+                int len = s.length();
+                byte[] data = new byte[len / 2];
+                for (int i = 0; i < len; i += 2) {
+                    int hi = (Character.digit(s.charAt(i), 16) << 4);
+                    int low = Character.digit(s.charAt(i + 1), 16);
+                    if (hi >= 256 || low < 0 || low >= 16) {
+                        return null;
+                    }
+                    data[i / 2] = (byte) (hi | low);
+                }
+                return data;
+            } catch (Exception ignored) {
+            }
+        }
+        return null;
+    }
+
+    public static byte[] reverse(byte[] bytes) {
+        byte[] result = new byte[bytes.length];
+        for (int i = 0; i < bytes.length; i++) {
+            result[i] = bytes[bytes.length - i - 1];
+        }
+        return result;
+    }
+
+    public static byte[] reverseInPlace(byte[] bytes) {
+        int len = bytes.length / 2;
+        for (int i = 0; i < len; i++) {
+            byte t = bytes[i];
+            bytes[i] = bytes[bytes.length - i - 1];
+            bytes[bytes.length - i - 1] = t;
+        }
+        return bytes;
+    }
+
+}
+

app/src/main/java/com/tangem/domain/wallet/CoinEngine.java

@@ -3,6 +3,7 @@ package com.tangem.domain.wallet;
 import android.net.Uri;
 import android.text.InputFilter;
 
+import com.tangem.tangemcard.data.Blockchain;
 import com.tangem.tangemcard.reader.CardProtocol;
 import com.tangem.tangemcard.tasks.SignTask;
 
@@ -237,7 +238,12 @@ public abstract class CoinEngine {
 
     public void defineWallet() throws CardProtocol.TangemException {
         try {
-            String wallet = calculateAddress(ctx.getCard().getWalletPublicKey());
+            String wallet;
+            if (ctx.getBlockchain() == Blockchain.BitcoinCash) {
+                wallet = calculateAddress(ctx.getCard().getWalletPublicKeyRar());
+            } else {
+                wallet = calculateAddress(ctx.getCard().getWalletPublicKey());
+            }    
             ctx.getCoinData().setWallet(wallet);
         }
         catch (Exception e)

app/src/main/java/com/tangem/domain/wallet/bch/BitcoinCashNode.kt

@@ -1,8 +1,24 @@
 package com.tangem.domain.wallet.bch
 
-enum class BitcoinCashNode(val host: String, val port: Int) {
+enum class BitcoinCashNode(val host: String, val port: Int, val proto: String) {
-    n1("electrumx-bch.cryptonermal.net", 50001),
+    N_001("electrumx.hillsideinternet.com", 50002, "ssl"),
-    n2("abc1.hsmiths.com", 60001),
+    N_002("bch0.kister.net", 50002, "ssl"),
-    n3("electrum.imaginary.cash", 50001),
+    N_003("abc1.hsmiths.com", 60002, "ssl"),
-    n4("35.157.238.5", 51001),
+    N_004("bch.curalle.ovh", 50002, "ssl"),
+    N_005("207.180.215.112", 52002, "ssl"),
+    N_006("bch.imaginary.cash", 50002, "ssl"),
+    N_007("dedi.jochen-hoenicke.de", 51002, "ssl"),
+    N_008("crypto.mldlabs.com", 50002, "ssl"),
+    N_009("bch.electrumx.cash", 50002, "ssl"),
+    N_010("electroncash.cascharia.com", 50002, "ssl"),
+    N_011("bch.crypto.mldlabs.com", 50002, "ssl"),
+    N_012("electron-cash.dragon.zone", 50002, "ssl"),
+    N_013("electron.coinucopia.io", 50002, "ssl"),
+    N_014("blackie.c3-soft.com", 50002, "ssl"),
+    N_015("electroncash.ueo.ch", 51002, "ssl"),
+    N_016("electrum.imaginary.cash", 50002, "ssl"),
+    N_017("35.157.238.5", 51002, "ssl"),
+    N_018("bitcoincash.quangld.com", 50002, "ssl"),
+    N_019("bch.stitthappens.com", 50002, "ssl"),
+    N_020("electroncash.dk", 50002, "ssl"),
 }

app/src/main/java/com/tangem/domain/wallet/bch/BtcCashEngine.java

@@ -3,6 +3,7 @@ package com.tangem.domain.wallet.bch;
 import android.net.Uri;
 import android.text.InputFilter;
 
+import com.tangem.domain.wallet.BCHUtils;
 import com.tangem.tangemcard.data.local.PINStorage;
 import com.tangem.tangemcard.reader.CardProtocol;
 import com.tangem.tangemcard.reader.TLV;
@@ -16,7 +17,6 @@ import com.tangem.tangemcard.data.TangemCard;
 import com.tangem.domain.wallet.TangemContext;
 import com.tangem.domain.wallet.Transaction;
 import com.tangem.domain.wallet.UnspentOutputInfo;
-import com.tangem.domain.wallet.BTCUtils;
 import com.tangem.tangemcard.tasks.SignTask;
 import com.tangem.util.CryptoUtil;
 import com.tangem.util.DecimalDigitsInputFilter;
@@ -448,7 +448,7 @@ public class BtcCashEngine extends CoinEngine {
         byte[] outputScriptWeAreAbleToSpend = Transaction.Script.buildOutput(srcLegacyAddress).bytes;
 
         // Collect unspent
-        ArrayList<UnspentOutputInfo> unspentOutputs = BTCUtils.getOutputs(rawTxList, outputScriptWeAreAbleToSpend);
+        ArrayList<UnspentOutputInfo> unspentOutputs = BCHUtils.getOutputs(rawTxList, outputScriptWeAreAbleToSpend);
 
         long fullAmount = 0;
         for (int i = 0; i < unspentOutputs.size(); ++i) {
@@ -477,7 +477,7 @@ public class BtcCashEngine extends CoinEngine {
         byte[][] bodyDoubleHash= new byte[unspentOutputs.size()][];
 
         for (int i = 0; i < unspentOutputs.size(); ++i) {
-            txForSign[i] = BTCUtils.buildTXForSign(srcLegacyAddress, destLegacyAddress, srcLegacyAddress, unspentOutputs, i, amount, change);
+            txForSign[i] = BCHUtils.buildTXForSign(srcLegacyAddress, destLegacyAddress, srcLegacyAddress, unspentOutputs, i, amount, change);
             bodyHash[i] = Util.calculateSHA256(txForSign[i]);
             bodyDoubleHash[i] = Util.calculateSHA256(bodyHash[i]);
         }
@@ -531,94 +531,10 @@ public class BtcCashEngine extends CoinEngine {
                     unspentOutputs.get(i).scriptForBuild = DerEncodingUtil.packSignDerBitcoinCash(r, s, pbKey);
                 }
 
-                byte[] txForSend=BTCUtils.buildTXForSend(destLegacyAddress, srcLegacyAddress, unspentOutputs, amountFinal, changeFinal);
+                byte[] txForSend=BCHUtils.buildTXForSend(destLegacyAddress, srcLegacyAddress, unspentOutputs, amountFinal, changeFinal);
 
                 notifyOnNeedSendPayment(txForSend);
             }
         };
     }
-
-//    @Override
-//    public byte[] sign(Amount feeValue, Amount amountValue, boolean IncFee, String destAddress, CardProtocol protocol) throws Exception {
-//
-//        checkBlockchainDataExists();
-//
-//        CoinEngine engine = CoinEngineFactory.INSTANCE.create(ctx);
-//
-//        String srcLegacyAddress = ((BtcCashEngine)engine).convertToLegacyAddress(ctx.getCoinData().getWallet());
-//        String destLegacyAddress = ((BtcCashEngine)engine).convertToLegacyAddress(destAddress);
-//        byte[] pbKey = ctx.getCard().getWalletPublicKeyRar(); //ALWAYS USING COMPRESS KEY
-//
-//        // Build script for our address
-//        List<BtcData.UnspentTransaction> rawTxList = coinData.getUnspentTransactions();
-//        byte[] outputScriptWeAreAbleToSpend = Transaction.Script.buildOutput(srcLegacyAddress).bytes;
-//
-//        // Collect unspent
-//        ArrayList<UnspentOutputInfo> unspentOutputs = BTCUtils.getOutputs(rawTxList, outputScriptWeAreAbleToSpend);
-//
-//        long fullAmount = 0;
-//        for (int i = 0; i < unspentOutputs.size(); ++i) {
-//            fullAmount += unspentOutputs.get(i).value;
-//        }
-//
-//
-//        long fees = convertToInternalAmount(feeValue).longValueExact();
-//        long amount = convertToInternalAmount(amountValue).longValueExact();
-//        long change = fullAmount - amount;
-//        if (IncFee) {
-//            amount = amount - fees;
-//        } else {
-//            change = change - fees;
-//        }
-//
-//        if (amount + fees > fullAmount) {
-//            throw new CardProtocol.TangemException_WrongAmount(String.format("Balance (%d) < change (%d) + amount (%d)", fullAmount, change, amount));
-//        }
-//
-//        byte[][] dataForSign = new byte[unspentOutputs.size()][];
-//
-//        for (int i = 0; i < unspentOutputs.size(); ++i) {
-//            byte[] newTX = BTCUtils.buildTXForSign(srcLegacyAddress, destLegacyAddress, srcLegacyAddress, unspentOutputs, i, amount, change);
-//
-//            byte[] hashData = Util.calculateSHA256(newTX);
-//            byte[] doubleHashData = Util.calculateSHA256(hashData);
-//
-//            unspentOutputs.get(i).bodyDoubleHash = doubleHashData;
-//            unspentOutputs.get(i).bodyHash = hashData;
-//
-//            if (ctx.getCard().getSigningMethod() == TangemCard.SigningMethod.Sign_Raw || ctx.getCard().getSigningMethod() == TangemCard.SigningMethod.Sign_Raw_Validated_By_Issuer) {
-//                dataForSign[i] = newTX;
-//            } else {
-//                dataForSign[i] = doubleHashData;
-//            }
-//
-//        }
-//
-//        byte[] signFromCard;
-//        if (ctx.getCard().getSigningMethod() == TangemCard.SigningMethod.Sign_Raw || ctx.getCard().getSigningMethod() == TangemCard.SigningMethod.Sign_Raw_Validated_By_Issuer) {
-//            ByteArrayOutputStream bs = new ByteArrayOutputStream();
-//            if (dataForSign.length > 10) throw new Exception("To much hashes in one transaction!");
-//            for (int i = 0; i < dataForSign.length; i++) {
-//                if (i != 0 && dataForSign[0].length != dataForSign[i].length)
-//                    throw new Exception("Hashes length must be identical!");
-//                bs.write(dataForSign[i]);
-//            }
-//            signFromCard = protocol.run_SignRaw(PINStorage.getPIN2(), "sha-256x2", bs.toByteArray(), null, null, null).getTLV(TLV.Tag.TAG_Signature).Value;
-//        } else {
-//            //ctx.getCard().getSigningMethod() == TangemCard.SigningMethod.Sign_Hash_Validated_By_Issuer
-//            //ctx.getCard().getIssuer()
-//            signFromCard = protocol.run_SignHashes(PINStorage.getPIN2(), dataForSign, null, null, null).getTLV(TLV.Tag.TAG_Signature).Value;
-//            // TODO slice signFromCard to hashes.length parts
-//        }
-//
-//        for (int i = 0; i < unspentOutputs.size(); ++i) {
-//            BigInteger r = new BigInteger(1, Arrays.copyOfRange(signFromCard, i * 64, 32 + i * 64));
-//            BigInteger s = new BigInteger(1, Arrays.copyOfRange(signFromCard, 32 + i * 64, 64 + i * 64));
-//            s = CryptoUtil.toCanonicalised(s);
-//
-//            unspentOutputs.get(i).scriptForBuild = DerEncodingUtil.packSignDerBitcoinCash(r, s, pbKey);
-//        }
-//
-//        return BTCUtils.buildTXForSend(destLegacyAddress, srcLegacyAddress, unspentOutputs, amount, change);
-//    }
 }

app/src/main/java/com/tangem/domain/wallet/btc/BitcoinOutputStream.java

@@ -4,6 +4,8 @@ package com.tangem.domain.wallet.btc;
  * Created by Ilia on 29.09.2017.
  */
 
+import com.tangem.domain.wallet.Transaction;
+
 import java.io.ByteArrayOutputStream;
 
 @SuppressWarnings("WeakerAccess")
@@ -40,4 +42,7 @@ public final class BitcoinOutputStream extends ByteArrayOutputStream {
             writeInt64(value);
         }
     }
+
+    public void write(Transaction.Script script) {
+    }
 }