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Updated on 2026-08-14

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Tangem 2019-11-08 08:29:33 +00:00
commit 7bda864ca3
2 changed files with 60 additions and 34 deletions
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14
app/src/main/java/com/tangem/wallet/BTCUtils.java
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@ -13,6 +13,10 @@ import com.tangem.wallet.btc.BitcoinException;
import com.tangem.wallet.btc.BitcoinOutputStream;
import com.tangem.wallet.btc.BtcData;
import org.bitcoinj.core.Address;
import org.bitcoinj.core.SegwitAddress;
import org.bitcoinj.script.ScriptBuilder;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.math.BigInteger;
@ -103,7 +107,15 @@ public final class BTCUtils {
//8 bytes
forSign.writeInt64(amount); //amount
byte[] sendScript = Transaction.Script.buildOutput(outputAddress).bytes; // build out
byte[] sendScript;
if (outputAddress.startsWith("bc1") || outputAddress.startsWith("tb1")) {
Address address = SegwitAddress.fromBech32(null, outputAddress);
sendScript = ScriptBuilder.createOutputScript(address).getProgram();
} else {
sendScript = Transaction.Script.buildOutput(outputAddress).bytes; // build out
}
//hex str 1976a914....88ac
forSign.write((byte) sendScript.length);
forSign.write(sendScript);

80
app/src/main/java/com/tangem/wallet/btc/BtcEngine.java
View file

@ -37,6 +37,10 @@ import com.tangem.wallet.TangemContext;
import com.tangem.wallet.Transaction;
import com.tangem.wallet.UnspentOutputInfo;
import org.bitcoinj.core.SegwitAddress;
import org.bitcoinj.params.MainNetParams;
import org.bitcoinj.params.TestNet3Params;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.math.BigDecimal;
@ -148,42 +152,52 @@ public class BtcEngine extends CoinEngine {
return false;
}
if (address.length() < 25) {
return false;
}
if (address.length() > 35) {
return false;
}
if (!address.startsWith("1") && !address.startsWith("2") && !address.startsWith("3") && !address.startsWith("n") && !address.startsWith("m")) {
return false;
}
byte[] decAddress = Base58.decodeBase58(address);
if (decAddress == null || decAddress.length == 0) {
return false;
}
byte[] rip = new byte[21];
for (int i = 0; i < 21; ++i) {
rip[i] = decAddress[i];
}
byte[] kcv = CryptoUtil.doubleSha256(rip);
for (int i = 0; i < 4; ++i) {
if (kcv[i] != decAddress[21 + i])
if (address.startsWith("1") || address.startsWith("2") || address.startsWith("3") || address.startsWith("n") || address.startsWith("m")) {
if (address.length() < 25) {
return false;
}
}
if (ctx.getBlockchain() != Blockchain.BitcoinTestNet && ctx.getBlockchain() != Blockchain.Bitcoin) {
return false;
}
if (address.length() > 35) {
return false;
}
if (ctx.getBlockchain() == Blockchain.BitcoinTestNet && (address.startsWith("1") || address.startsWith("3"))) {
return false;
byte[] decAddress = Base58.decodeBase58(address);
if (decAddress == null || decAddress.length == 0) {
return false;
}
byte[] rip = new byte[21];
for (int i = 0; i < 21; ++i) {
rip[i] = decAddress[i];
}
byte[] kcv = CryptoUtil.doubleSha256(rip);
for (int i = 0; i < 4; ++i) {
if (kcv[i] != decAddress[21 + i])
return false;
}
if (ctx.getBlockchain() != Blockchain.BitcoinTestNet && ctx.getBlockchain() != Blockchain.Bitcoin) {
return false;
}
if (ctx.getBlockchain() == Blockchain.BitcoinTestNet && (address.startsWith("1") || address.startsWith("3"))) {
return false;
}
} else {
try {
if (ctx.getBlockchain() == Blockchain.Bitcoin) {
SegwitAddress.fromBech32(new MainNetParams(), address);
} else if (ctx.getBlockchain() == Blockchain.BitcoinTestNet) {
SegwitAddress.fromBech32(new TestNet3Params(), address);
} else {
return false;
}
} catch (Exception e) {
return false;
}
}
return true;