mirror of
https://github.com/sparrowwallet/drongo.git
synced 2025-11-05 11:56:38 +00:00
add initial silent payments library support
This commit is contained in:
Craig Raw
parent
d30cc4432c
commit
e12fdfa47c
9 changed files with 365 additions and 0 deletions
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@ -104,6 +104,10 @@ public class KeyDerivation {
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return List.of(new ChildNumber(47, true), new ChildNumber(Network.get() == Network.MAINNET ? 0 : 1, true), new ChildNumber(Math.max(0, account), true));
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return List.of(new ChildNumber(47, true), new ChildNumber(Network.get() == Network.MAINNET ? 0 : 1, true), new ChildNumber(Math.max(0, account), true));
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}
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}
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public static List<ChildNumber> getBip352Derivation(int account) {
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return List.of(new ChildNumber(352, true), new ChildNumber(Network.get() == Network.MAINNET ? 0 : 1, true), new ChildNumber(Math.max(0, account), true));
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}
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public KeyDerivation copy() {
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public KeyDerivation copy() {
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return new KeyDerivation(masterFingerprint, derivationPath);
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return new KeyDerivation(masterFingerprint, derivationPath);
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}
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}
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@ -121,6 +121,11 @@ public class Bech32 {
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/** Encode a Bech32 string. */
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/** Encode a Bech32 string. */
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public static String encode(String hrp, int version, final byte[] values) {
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public static String encode(String hrp, int version, final byte[] values) {
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Encoding encoding = (version == 0 ? Encoding.BECH32 : Encoding.BECH32M);
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Encoding encoding = (version == 0 ? Encoding.BECH32 : Encoding.BECH32M);
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return encode(hrp, version, encoding, values);
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}
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/** Encode a Bech32 string. */
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public static String encode(String hrp, int version, Encoding encoding, final byte[] values) {
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return encode(hrp, encoding, encode(version, values));
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return encode(hrp, encoding, encode(version, values));
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}
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}
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@ -0,0 +1,63 @@
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package com.sparrowwallet.drongo.silentpayments;
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import com.sparrowwallet.drongo.Network;
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import com.sparrowwallet.drongo.Utils;
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import com.sparrowwallet.drongo.crypto.ECKey;
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import com.sparrowwallet.drongo.protocol.Bech32;
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import java.util.Arrays;
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public class SilentPaymentAddress {
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private final ECKey scanAddress;
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private final ECKey spendAddress;
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public SilentPaymentAddress(ECKey scanAddress, ECKey spendAddress) {
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this.scanAddress = scanAddress;
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this.spendAddress = spendAddress;
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}
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public ECKey getScanKey() {
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return scanAddress;
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}
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public ECKey getSpendKey() {
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return spendAddress;
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}
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public String getAddress() {
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byte[] keys = Utils.concat(scanAddress.getPubKey(), spendAddress.getPubKey());
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return Bech32.encode(getHrp(), 0, Bech32.Encoding.BECH32M, keys);
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}
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private static String getHrp() {
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return Network.get() == Network.MAINNET ? "sp" : "tsp";
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}
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public static SilentPaymentAddress from(String address) {
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Bech32.Bech32Data data = Bech32.decode(address, 1023);
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if(data.encoding != Bech32.Encoding.BECH32M) {
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throw new IllegalArgumentException("Invalid silent payments address encoding");
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}
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if(!getHrp().equals(data.hrp)) {
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throw new IllegalArgumentException("Invalid silent payments address hrp");
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}
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int witnessVersion = data.data[0];
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if(witnessVersion != 0) {
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throw new UnsupportedOperationException("Unsupported silent payments address witness version");
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}
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byte[] convertedProgram = Arrays.copyOfRange(data.data, 1, data.data.length);
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byte[] witnessProgram = Bech32.convertBits(convertedProgram, 0, convertedProgram.length, 5, 8, false);
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if(witnessProgram.length != 66) {
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throw new IllegalArgumentException("Invalid silent payments address witness length");
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}
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ECKey scanPubKey = ECKey.fromPublicOnly(Arrays.copyOfRange(witnessProgram, 0, 33));
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ECKey spendPubKey = ECKey.fromPublicOnly(Arrays.copyOfRange(witnessProgram, 33, 66));
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return new SilentPaymentAddress(scanPubKey, spendPubKey);
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}
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}
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@ -0,0 +1,36 @@
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package com.sparrowwallet.drongo.silentpayments;
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import com.sparrowwallet.drongo.KeyDerivation;
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import com.sparrowwallet.drongo.crypto.ECKey;
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import com.sparrowwallet.drongo.policy.Policy;
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import com.sparrowwallet.drongo.policy.PolicyType;
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import com.sparrowwallet.drongo.protocol.ScriptType;
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import com.sparrowwallet.drongo.wallet.*;
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public class SilentPaymentScanAddress extends SilentPaymentAddress {
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public SilentPaymentScanAddress(ECKey scanPrivateKey, ECKey spendPublicKey) {
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super(scanPrivateKey, spendPublicKey);
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if(scanPrivateKey.isPubKeyOnly()) {
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throw new IllegalArgumentException("Scan key must be a private key");
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}
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}
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public static SilentPaymentScanAddress from(DeterministicSeed deterministicSeed, int account) throws MnemonicException {
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Wallet spWallet = new Wallet();
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spWallet.setPolicyType(PolicyType.SINGLE);
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spWallet.setScriptType(ScriptType.P2WPKH);
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Keystore spKeystore = Keystore.fromSeed(deterministicSeed, KeyDerivation.getBip352Derivation(account));
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spWallet.getKeystores().add(spKeystore);
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spWallet.setDefaultPolicy(Policy.getPolicy(PolicyType.SINGLE, ScriptType.P2WPKH, spWallet.getKeystores(), 1));
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WalletNode spendNode = new WalletNode(spWallet, "m/0'/0");
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WalletNode scanNode = new WalletNode(spWallet, "m/1'/0");
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return from(spKeystore.getKey(scanNode), ECKey.fromPublicOnly(spKeystore.getKey(spendNode)));
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}
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public static SilentPaymentScanAddress from(ECKey scanPrivateKey, ECKey spendPublicKey) {
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return new SilentPaymentScanAddress(scanPrivateKey, spendPublicKey);
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}
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}
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@ -0,0 +1,132 @@
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package com.sparrowwallet.drongo.silentpayments;
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import com.sparrowwallet.drongo.Utils;
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import com.sparrowwallet.drongo.crypto.ECKey;
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import com.sparrowwallet.drongo.protocol.*;
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import org.bitcoin.NativeSecp256k1;
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import org.bitcoin.NativeSecp256k1Util;
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import org.bitcoin.Secp256k1Context;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.Map;
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public class SilentPaymentUtils {
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private static final Logger log = LoggerFactory.getLogger(SilentPaymentUtils.class);
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private static final List<ScriptType> SCRIPT_TYPES = List.of(ScriptType.P2TR, ScriptType.P2WPKH, ScriptType.P2SH_P2WPKH, ScriptType.P2PKH);
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public static boolean isEligible(Transaction tx, Map<HashIndex, TransactionOutput> spentOutputs) {
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if(!containsTaprootOutput(tx)) {
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return false;
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}
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if(getInputPubKeys(tx, spentOutputs).isEmpty()) {
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return false;
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}
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if(spendsInvalidSegwitOutput(tx, spentOutputs)) {
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return false;
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}
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return true;
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}
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public static List<ECKey> getInputPubKeys(Transaction tx, Map<HashIndex, TransactionOutput> spentOutputs) {
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List<ECKey> keys = new ArrayList<>();
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for(TransactionInput input : tx.getInputs()) {
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HashIndex hashIndex = new HashIndex(input.getOutpoint().getHash(), input.getOutpoint().getIndex());
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TransactionOutput output = spentOutputs.get(hashIndex);
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if(output == null) {
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throw new IllegalStateException("No output found for input " + input.getOutpoint());
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}
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for(ScriptType scriptType : SCRIPT_TYPES) {
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if(scriptType.isScriptType(output.getScript())) {
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switch(scriptType) {
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case P2TR:
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keys.add(output.getScript().getPubKey());
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break;
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case P2WPKH:
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case P2SH_P2WPKH:
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if(input.getWitness() != null && input.getWitness().getPushCount() == 2) {
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keys.add(ECKey.fromPublicOnly(input.getWitness().getPushes().get(input.getWitness().getPushCount() - 1)));
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}
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break;
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case P2PKH:
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for(ScriptChunk scriptChunk : input.getScriptSig().getChunks()) {
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if(scriptChunk.isPubKey()) {
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keys.add(scriptChunk.getPubKey());
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}
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}
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break;
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default:
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throw new IllegalStateException("Unhandled script type " + scriptType);
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}
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}
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}
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}
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return keys;
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}
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public static boolean containsTaprootOutput(Transaction tx) {
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for(TransactionOutput output : tx.getOutputs()) {
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if(ScriptType.P2TR.isScriptType(output.getScript())) {
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return true;
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}
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}
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return false;
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}
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public static boolean spendsInvalidSegwitOutput(Transaction tx, Map<HashIndex, TransactionOutput> spentOutputs) {
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for(TransactionInput input : tx.getInputs()) {
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HashIndex hashIndex = new HashIndex(input.getOutpoint().getHash(), input.getOutpoint().getIndex());
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Script scriptPubKey = spentOutputs.get(hashIndex).getScript();
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List<ScriptChunk> chunks = scriptPubKey.getChunks();
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if(chunks.size() == 2 && chunks.getFirst().isOpCode() && chunks.get(1).getData() != null
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&& chunks.getFirst().getOpcode() >= ScriptOpCodes.OP_2 && chunks.getFirst().getOpcode() <= ScriptOpCodes.OP_16) {
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return true;
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}
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}
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return false;
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}
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public static byte[] getTweak(Transaction tx, Map<HashIndex, TransactionOutput> spentOutputs) {
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if(tx.getOutputs().stream().noneMatch(output -> ScriptType.P2TR.isScriptType(output.getScript()))) {
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return null;
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}
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if(spendsInvalidSegwitOutput(tx, spentOutputs)) {
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return null;
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}
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List<ECKey> inputKeys = getInputPubKeys(tx, spentOutputs);
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if(inputKeys.isEmpty()) {
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return null;
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}
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if(!Secp256k1Context.isEnabled()) {
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throw new IllegalStateException("libsecp256k1 is not enabled");
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}
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try {
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byte[][] inputPubKeys = new byte[inputKeys.size()][];
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for(int i = 0; i < inputPubKeys.length; i++) {
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inputPubKeys[i] = inputKeys.get(i).getPubKey(true);
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}
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byte[] combinedPubKey = NativeSecp256k1.pubKeyCombine(inputPubKeys, true);
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byte[] smallestOutpoint = tx.getInputs().stream().map(input -> input.getOutpoint().bitcoinSerialize()).min(new Utils.LexicographicByteArrayComparator()).orElseThrow();
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byte[] inputHash = Utils.taggedHash("BIP0352/Inputs", Utils.concat(smallestOutpoint, combinedPubKey));
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return NativeSecp256k1.pubKeyTweakMul(combinedPubKey, inputHash, true);
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} catch(NativeSecp256k1Util.AssertFailException e) {
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log.error("Error computing tweak", e);
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}
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return null;
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}
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}
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@ -21,5 +21,6 @@ open module com.sparrowwallet.drongo {
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exports com.sparrowwallet.drongo.bip47;
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exports com.sparrowwallet.drongo.bip47;
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exports com.sparrowwallet.drongo.dns;
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exports com.sparrowwallet.drongo.dns;
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exports com.sparrowwallet.drongo.wallet.slip39;
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exports com.sparrowwallet.drongo.wallet.slip39;
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exports com.sparrowwallet.drongo.silentpayments;
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exports org.bitcoin;
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exports org.bitcoin;
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}
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}
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@ -0,0 +1,18 @@
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package com.sparrowwallet.drongo.silentpayments;
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import com.sparrowwallet.drongo.Utils;
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import com.sparrowwallet.drongo.crypto.ECKey;
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import org.junit.jupiter.api.Assertions;
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import org.junit.jupiter.api.Test;
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public class SilentPaymentAddressTest {
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@Test
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public void testDecode() {
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ECKey scanPrivateKey = ECKey.fromPrivate(Utils.hexToBytes("0f694e068028a717f8af6b9411f9a133dd3565258714cc226594b34db90c1f2c"));
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ECKey spendPrivateKey = ECKey.fromPrivate(Utils.hexToBytes("9d6ad855ce3417ef84e836892e5a56392bfba05fa5d97ccea30e266f540e08b3"));
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SilentPaymentAddress silentPaymentAddress = SilentPaymentAddress.from("sp1qqgste7k9hx0qftg6qmwlkqtwuy6cycyavzmzj85c6qdfhjdpdjtdgqjuexzk6murw56suy3e0rd2cgqvycxttddwsvgxe2usfpxumr70xc9pkqwv");
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Assertions.assertEquals(ECKey.fromPublicOnly(scanPrivateKey), silentPaymentAddress.getScanKey());
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Assertions.assertEquals(ECKey.fromPublicOnly(spendPrivateKey), silentPaymentAddress.getSpendKey());
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}
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}
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@ -0,0 +1,44 @@
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package com.sparrowwallet.drongo.silentpayments;
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import com.sparrowwallet.drongo.Network;
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import com.sparrowwallet.drongo.Utils;
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import com.sparrowwallet.drongo.crypto.ECKey;
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import com.sparrowwallet.drongo.wallet.DeterministicSeed;
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import com.sparrowwallet.drongo.wallet.MnemonicException;
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import org.junit.jupiter.api.AfterEach;
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import org.junit.jupiter.api.Assertions;
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import org.junit.jupiter.api.Test;
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public class SilentPaymentScanAddressTest {
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@Test
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public void testEncode() {
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ECKey scanPrivateKey = ECKey.fromPrivate(Utils.hexToBytes("0f694e068028a717f8af6b9411f9a133dd3565258714cc226594b34db90c1f2c"));
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ECKey spendPrivateKey = ECKey.fromPrivate(Utils.hexToBytes("9d6ad855ce3417ef84e836892e5a56392bfba05fa5d97ccea30e266f540e08b3"));
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SilentPaymentScanAddress silentPaymentScanAddress = SilentPaymentScanAddress.from(scanPrivateKey, ECKey.fromPublicOnly(spendPrivateKey));
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Assertions.assertEquals("sp1qqgste7k9hx0qftg6qmwlkqtwuy6cycyavzmzj85c6qdfhjdpdjtdgqjuexzk6murw56suy3e0rd2cgqvycxttddwsvgxe2usfpxumr70xc9pkqwv", silentPaymentScanAddress.getAddress());
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}
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@Test
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public void testEncodeFromSeed() throws MnemonicException {
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Network.set(Network.TESTNET);
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DeterministicSeed seed = new DeterministicSeed("life life life life life life life life life life life life", "", 0, DeterministicSeed.Type.BIP39);
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SilentPaymentScanAddress silentPaymentScanAddress = SilentPaymentScanAddress.from(seed, 0);
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Assertions.assertEquals("tsp1qq0grgkzt7uwfst33pyge7k9mrkag0r9vrklc695n0pw7kwwc7qddqqley3n2a6z8q7vhkhzedtzj5kr86hv6fhh0zvu2j9tjrrxa4ye3acuv6f3q", silentPaymentScanAddress.getAddress());
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Assertions.assertEquals("36dc57ced5f4a76059947802f094ea40d0c11c74d444a1e7d3ea5e74b8d83d45", Utils.bytesToHex(silentPaymentScanAddress.getScanKey().getPrivKeyBytes()));
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Assertions.assertEquals("03f92466aee84707997b5c596ac52a5867d5d9a4deef1338a9157218cdda9331ee", Utils.bytesToHex(silentPaymentScanAddress.getSpendKey().getPubKey()));
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}
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@Test
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public void testEncodeFromSeed2() throws MnemonicException {
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Network.set(Network.TESTNET);
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DeterministicSeed seed = new DeterministicSeed("resist cube wrap sleep catalog shadow door scale stage rail script observe", "", 0, DeterministicSeed.Type.BIP39);
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SilentPaymentScanAddress silentPaymentScanAddress = SilentPaymentScanAddress.from(seed, 0);
|
||||||
|
Assertions.assertEquals("tsp1qqgksl44sjwjkedsmrfmf2xqsnyt2njtjp5plk2kzjlnd9el2n76awqe5j974lvkf2utv7nrg0eaug55z86n6n3v4e9alnftdzgqk6pqmm5dphvxn", silentPaymentScanAddress.getAddress());
|
||||||
|
}
|
||||||
|
|
||||||
|
@AfterEach
|
||||||
|
public void tearDown() {
|
||||||
|
Network.set(null);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
@ -0,0 +1,62 @@
|
||||||
|
package com.sparrowwallet.drongo.silentpayments;
|
||||||
|
|
||||||
|
import com.sparrowwallet.drongo.Utils;
|
||||||
|
import com.sparrowwallet.drongo.crypto.ECKey;
|
||||||
|
import com.sparrowwallet.drongo.protocol.*;
|
||||||
|
import org.junit.jupiter.api.Assertions;
|
||||||
|
import org.junit.jupiter.api.Test;
|
||||||
|
|
||||||
|
import java.util.HashMap;
|
||||||
|
import java.util.Map;
|
||||||
|
|
||||||
|
public class SilentPaymentUtilsTest {
|
||||||
|
@Test
|
||||||
|
public void testTweak() {
|
||||||
|
Transaction transaction = new Transaction();
|
||||||
|
transaction.addInput(Sha256Hash.wrap("f4184fc596403b9d638783cf57adfe4c75c605f6356fbc91338530e9831e9e16"), 0, new Script(Utils.hexToBytes("483046022100ad79e6801dd9a8727f342f31c71c4912866f59dc6e7981878e92c5844a0ce929022100fb0d2393e813968648b9753b7e9871d90ab3d815ebf91820d704b19f4ed224d621025a1e61f898173040e20616d43e9f496fba90338a39faa1ed98fcbaeee4dd9be5")));
|
||||||
|
transaction.addInput(Sha256Hash.wrap("a1075db55d416d3ca199f55b6084e2115b9345e16c5cf302fc80e9d5fbf5d48d"), 0, new Script(Utils.hexToBytes("48304602210086783ded73e961037e77d49d9deee4edc2b23136e9728d56e4491c80015c3a63022100fda4c0f21ea18de29edbce57f7134d613e044ee150a89e2e64700de2d4e83d4e2103bd85685d03d111699b15d046319febe77f8de5286e9e512703cdee1bf3be3792")));
|
||||||
|
transaction.addOutput(1000L, ScriptType.P2TR.getOutputScript(ECKey.fromPublicOnly(Utils.hexToBytes("3e9fce73d4e77a4809908e3c3a2e54ee147b9312dc5044a193d1fc85de46e3c1"))));
|
||||||
|
|
||||||
|
Map<HashIndex, TransactionOutput> spentOutputs = new HashMap<>();
|
||||||
|
HashIndex hashIndex0 = new HashIndex(transaction.getInputs().getFirst().getOutpoint().getHash(), transaction.getInputs().getFirst().getOutpoint().getIndex());
|
||||||
|
TransactionOutput spentOutput0 = new TransactionOutput(new Transaction(), 400L, new Script(Utils.hexToBytes("76a91419c2f3ae0ca3b642bd3e49598b8da89f50c1416188ac")));
|
||||||
|
HashIndex hashIndex1 = new HashIndex(transaction.getInputs().getLast().getOutpoint().getHash(), transaction.getInputs().getLast().getOutpoint().getIndex());
|
||||||
|
TransactionOutput spentOutput1 = new TransactionOutput(new Transaction(), 400L, new Script(Utils.hexToBytes("76a914d9317c66f54ff0a152ec50b1d19c25be50c8e15988ac")));
|
||||||
|
spentOutputs.put(hashIndex0, spentOutput0);
|
||||||
|
spentOutputs.put(hashIndex1, spentOutput1);
|
||||||
|
|
||||||
|
byte[] tweak = SilentPaymentUtils.getTweak(transaction, spentOutputs);
|
||||||
|
Assertions.assertNotNull(tweak);
|
||||||
|
Assertions.assertEquals("024ac253c216532e961988e2a8ce266a447c894c781e52ef6cee902361db960004", Utils.bytesToHex(tweak));
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void testTweakReversed() {
|
||||||
|
Transaction transaction = new Transaction();
|
||||||
|
transaction.addInput(Sha256Hash.wrap("a1075db55d416d3ca199f55b6084e2115b9345e16c5cf302fc80e9d5fbf5d48d"), 0, new Script(Utils.hexToBytes("483046022100ad79e6801dd9a8727f342f31c71c4912866f59dc6e7981878e92c5844a0ce929022100fb0d2393e813968648b9753b7e9871d90ab3d815ebf91820d704b19f4ed224d621025a1e61f898173040e20616d43e9f496fba90338a39faa1ed98fcbaeee4dd9be5")));
|
||||||
|
transaction.addInput(Sha256Hash.wrap("f4184fc596403b9d638783cf57adfe4c75c605f6356fbc91338530e9831e9e16"), 0, new Script(Utils.hexToBytes("48304602210086783ded73e961037e77d49d9deee4edc2b23136e9728d56e4491c80015c3a63022100fda4c0f21ea18de29edbce57f7134d613e044ee150a89e2e64700de2d4e83d4e2103bd85685d03d111699b15d046319febe77f8de5286e9e512703cdee1bf3be3792")));
|
||||||
|
transaction.addOutput(1000L, ScriptType.P2TR.getOutputScript(ECKey.fromPublicOnly(Utils.hexToBytes("3e9fce73d4e77a4809908e3c3a2e54ee147b9312dc5044a193d1fc85de46e3c1"))));
|
||||||
|
|
||||||
|
Map<HashIndex, TransactionOutput> spentOutputs = new HashMap<>();
|
||||||
|
HashIndex hashIndex0 = new HashIndex(transaction.getInputs().getFirst().getOutpoint().getHash(), transaction.getInputs().getFirst().getOutpoint().getIndex());
|
||||||
|
TransactionOutput spentOutput0 = new TransactionOutput(new Transaction(), 400L, new Script(Utils.hexToBytes("76a91419c2f3ae0ca3b642bd3e49598b8da89f50c1416188ac")));
|
||||||
|
HashIndex hashIndex1 = new HashIndex(transaction.getInputs().getLast().getOutpoint().getHash(), transaction.getInputs().getLast().getOutpoint().getIndex());
|
||||||
|
TransactionOutput spentOutput1 = new TransactionOutput(new Transaction(), 400L, new Script(Utils.hexToBytes("76a914d9317c66f54ff0a152ec50b1d19c25be50c8e15988ac")));
|
||||||
|
spentOutputs.put(hashIndex0, spentOutput0);
|
||||||
|
spentOutputs.put(hashIndex1, spentOutput1);
|
||||||
|
|
||||||
|
byte[] tweak = SilentPaymentUtils.getTweak(transaction, spentOutputs);
|
||||||
|
Assertions.assertNotNull(tweak);
|
||||||
|
Assertions.assertEquals("024ac253c216532e961988e2a8ce266a447c894c781e52ef6cee902361db960004", Utils.bytesToHex(tweak));
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void testInvalidOutput() {
|
||||||
|
Transaction transaction = new Transaction();
|
||||||
|
transaction.addInput(Sha256Hash.wrap("a1075db55d416d3ca199f55b6084e2115b9345e16c5cf302fc80e9d5fbf5d48d"), 0, new Script(Utils.hexToBytes("483046022100ad79e6801dd9a8727f342f31c71c4912866f59dc6e7981878e92c5844a0ce929022100fb0d2393e813968648b9753b7e9871d90ab3d815ebf91820d704b19f4ed224d621025a1e61f898173040e20616d43e9f496fba90338a39faa1ed98fcbaeee4dd9be5")));
|
||||||
|
transaction.addInput(Sha256Hash.wrap("f4184fc596403b9d638783cf57adfe4c75c605f6356fbc91338530e9831e9e16"), 0, new Script(Utils.hexToBytes("48304602210086783ded73e961037e77d49d9deee4edc2b23136e9728d56e4491c80015c3a63022100fda4c0f21ea18de29edbce57f7134d613e044ee150a89e2e64700de2d4e83d4e2103bd85685d03d111699b15d046319febe77f8de5286e9e512703cdee1bf3be3792")));
|
||||||
|
transaction.addOutput(1000L, ScriptType.P2WPKH.getOutputScript(ECKey.fromPublicOnly(Utils.hexToBytes("3e9fce73d4e77a4809908e3c3a2e54ee147b9312dc5044a193d1fc85de46e3c1"))));
|
||||||
|
|
||||||
|
Assertions.assertFalse(SilentPaymentUtils.containsTaprootOutput(transaction));
|
||||||
|
}
|
||||||
|
}
|
||||||
Loading…
Reference in a new issue