-
Notifications
You must be signed in to change notification settings - Fork 1.3k
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
The factory can create, sign, and finalize the warning transaction.
- Loading branch information
Showing
2 changed files
with
220 additions
and
3 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
156 changes: 156 additions & 0 deletions
156
core/src/main/java/bisq/core/btc/wallet/WarningTransactionFactory.java
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,156 @@ | ||
| /* | ||
| * This file is part of Bisq. | ||
| * | ||
| * Bisq is free software: you can redistribute it and/or modify it | ||
| * under the terms of the GNU Affero General Public License as published by | ||
| * the Free Software Foundation, either version 3 of the License, or (at | ||
| * your option) any later version. | ||
| * | ||
| * Bisq is distributed in the hope that it will be useful, but WITHOUT | ||
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public | ||
| * License for more details. | ||
| * | ||
| * You should have received a copy of the GNU Affero General Public License | ||
| * along with Bisq. If not, see <http://www.gnu.org/licenses/>. | ||
| */ | ||
|
|
||
| package bisq.core.btc.wallet; | ||
|
|
||
| import bisq.core.btc.exceptions.TransactionVerificationException; | ||
|
|
||
| import bisq.common.util.Tuple2; | ||
|
|
||
| import org.bitcoinj.core.Address; | ||
| import org.bitcoinj.core.AddressFormatException; | ||
| import org.bitcoinj.core.Coin; | ||
| import org.bitcoinj.core.ECKey; | ||
| import org.bitcoinj.core.NetworkParameters; | ||
| import org.bitcoinj.core.Sha256Hash; | ||
| import org.bitcoinj.core.SignatureDecodeException; | ||
| import org.bitcoinj.core.Transaction; | ||
| import org.bitcoinj.core.TransactionInput; | ||
| import org.bitcoinj.core.TransactionOutput; | ||
| import org.bitcoinj.core.TransactionWitness; | ||
| import org.bitcoinj.crypto.DeterministicKey; | ||
| import org.bitcoinj.crypto.TransactionSignature; | ||
| import org.bitcoinj.script.Script; | ||
| import org.bitcoinj.script.ScriptBuilder; | ||
|
|
||
| import org.bouncycastle.crypto.params.KeyParameter; | ||
|
|
||
| import static com.google.common.base.Preconditions.checkNotNull; | ||
| import static org.bitcoinj.script.ScriptOpCodes.*; | ||
|
|
||
| public class WarningTransactionFactory { | ||
| private final NetworkParameters params; | ||
|
|
||
| public WarningTransactionFactory(NetworkParameters params) { | ||
| this.params = params; | ||
| } | ||
|
|
||
| public Transaction createUnsignedWarningTransaction(boolean isBuyer, | ||
| Transaction depositTx, | ||
| long lockTime, | ||
| byte[] buyerPubKey, | ||
| byte[] sellerPubKey, | ||
| int claimDelay, | ||
| long miningFee, | ||
| Tuple2<Long, String> feeBumpOutputAmountAndAddress) | ||
| throws TransactionVerificationException { | ||
|
|
||
| Transaction warningTx = new Transaction(params); | ||
| TradeWalletService.applyLockTime(lockTime, warningTx); | ||
|
|
||
| TransactionOutput depositTxOutput = depositTx.getOutput(0); | ||
| warningTx.addInput(depositTxOutput); | ||
|
|
||
| Coin warningTxOutputCoin = depositTxOutput.getValue() | ||
| .subtract(Coin.valueOf(miningFee)) | ||
| .subtract(Coin.valueOf(feeBumpOutputAmountAndAddress.first)); | ||
| Script outputScript = createOutputScript(isBuyer, buyerPubKey, sellerPubKey, claimDelay); | ||
| warningTx.addOutput(warningTxOutputCoin, outputScript); | ||
|
|
||
| warningTx.addOutput( | ||
| Coin.valueOf(feeBumpOutputAmountAndAddress.first), | ||
| Address.fromString(params, feeBumpOutputAmountAndAddress.second) | ||
| ); | ||
|
|
||
| WalletService.printTx("Unsigned warningTx", warningTx); | ||
| WalletService.verifyTransaction(warningTx); | ||
| return warningTx; | ||
| } | ||
|
|
||
| public byte[] signWarningTransaction(Transaction warningTx, | ||
| Transaction preparedDepositTx, | ||
| DeterministicKey myMultiSigKeyPair, | ||
| byte[] buyerPubKey, | ||
| byte[] sellerPubKey, | ||
| KeyParameter aesKey) | ||
| throws AddressFormatException, TransactionVerificationException { | ||
|
|
||
| Script redeemScript = TradeWalletService.get2of2MultiSigRedeemScript(buyerPubKey, sellerPubKey); | ||
| Coin warningTxInputValue = preparedDepositTx.getOutput(0).getValue(); | ||
|
|
||
| Sha256Hash sigHash = warningTx.hashForWitnessSignature(0, redeemScript, | ||
| warningTxInputValue, Transaction.SigHash.ALL, false); | ||
|
|
||
| checkNotNull(myMultiSigKeyPair, "myMultiSigKeyPair must not be null"); | ||
| if (myMultiSigKeyPair.isEncrypted()) { | ||
| checkNotNull(aesKey); | ||
| } | ||
|
|
||
| ECKey.ECDSASignature mySignature = myMultiSigKeyPair.sign(sigHash, aesKey).toCanonicalised(); | ||
| WalletService.printTx("warningTx for sig creation", warningTx); | ||
| WalletService.verifyTransaction(warningTx); | ||
| return mySignature.encodeToDER(); | ||
| } | ||
|
|
||
| public Transaction finalizeWarningTransaction(Transaction warningTx, | ||
| byte[] buyerPubKey, | ||
| byte[] sellerPubKey, | ||
| byte[] buyerSignature, | ||
| byte[] sellerSignature, | ||
| Coin inputValue) | ||
| throws AddressFormatException, TransactionVerificationException, SignatureDecodeException { | ||
|
|
||
| Script redeemScript = TradeWalletService.get2of2MultiSigRedeemScript(buyerPubKey, sellerPubKey); | ||
| ECKey.ECDSASignature buyerECDSASignature = ECKey.ECDSASignature.decodeFromDER(buyerSignature); | ||
| ECKey.ECDSASignature sellerECDSASignature = ECKey.ECDSASignature.decodeFromDER(sellerSignature); | ||
|
|
||
| TransactionSignature buyerTxSig = new TransactionSignature(buyerECDSASignature, Transaction.SigHash.ALL, false); | ||
| TransactionSignature sellerTxSig = new TransactionSignature(sellerECDSASignature, Transaction.SigHash.ALL, false); | ||
|
|
||
| TransactionInput input = warningTx.getInput(0); | ||
| input.setScriptSig(ScriptBuilder.createEmpty()); | ||
| TransactionWitness witness = TransactionWitness.redeemP2WSH(redeemScript, sellerTxSig, buyerTxSig); | ||
| input.setWitness(witness); | ||
|
|
||
| WalletService.printTx("finalizeWarningTransaction", warningTx); | ||
| WalletService.verifyTransaction(warningTx); | ||
|
|
||
| Script scriptPubKey = TradeWalletService.get2of2MultiSigOutputScript(buyerPubKey, sellerPubKey, false); | ||
| input.getScriptSig().correctlySpends(warningTx, 0, witness, inputValue, scriptPubKey, Script.ALL_VERIFY_FLAGS); | ||
| return warningTx; | ||
| } | ||
|
|
||
| private Script createOutputScript(boolean isBuyer, byte[] buyerPubKey, byte[] sellerPubKey, int claimDelay) { | ||
| var scriptBuilder = new ScriptBuilder(); | ||
| scriptBuilder.op(OP_IF) | ||
| .number(2) | ||
| .data(buyerPubKey) | ||
| .data(sellerPubKey) | ||
| .number(2) | ||
| .op(OP_CHECKMULTISIG); | ||
|
|
||
| scriptBuilder.op(OP_ELSE) | ||
| .number(claimDelay) | ||
| .op(OP_CHECKSEQUENCEVERIFY) | ||
| .op(OP_DROP) | ||
| .data(isBuyer ? buyerPubKey : sellerPubKey) | ||
| .op(OP_CHECKSIG); | ||
|
|
||
| return scriptBuilder.op(OP_ENDIF) | ||
| .build(); | ||
| } | ||
| } |