/** * When the servers signature for the refund transaction is received, call this to verify it and * sign the complete refund ourselves. * * <p>If this does not throw an exception, we are secure against the loss of funds and can safely * provide the server with the multi-sig contract to lock in the agreement. In this case, both the * multisig contract and the refund transaction are automatically committed to wallet so that it * can handle broadcasting the refund transaction at the appropriate time if necessary. */ public synchronized void provideRefundSignature(byte[] theirSignature) throws VerificationException { checkNotNull(theirSignature); checkState(state == State.WAITING_FOR_SIGNED_REFUND); TransactionSignature theirSig = TransactionSignature.decodeFromBitcoin(theirSignature, true); if (theirSig.sigHashMode() != Transaction.SigHash.NONE || !theirSig.anyoneCanPay()) throw new VerificationException("Refund signature was not SIGHASH_NONE|SIGHASH_ANYONECANPAY"); // Sign the refund transaction ourselves. final TransactionOutput multisigContractOutput = multisigContract.getOutput(0); try { multisigScript = multisigContractOutput.getScriptPubKey(); } catch (ScriptException e) { throw new RuntimeException(e); // Cannot happen: we built this ourselves. } TransactionSignature ourSignature = refundTx.calculateSignature(0, myKey, multisigScript, Transaction.SigHash.ALL, false); // Insert the signatures. Script scriptSig = ScriptBuilder.createMultiSigInputScript(ourSignature, theirSig); log.info("Refund scriptSig: {}", scriptSig); log.info("Multi-sig contract scriptPubKey: {}", multisigScript); TransactionInput refundInput = refundTx.getInput(0); refundInput.setScriptSig(scriptSig); refundInput.verify(multisigContractOutput); state = State.SAVE_STATE_IN_WALLET; }
public static void signTransaction(Transaction tx, String qrCodeContent) throws ScriptException { String[] stringArray = qrCodeContent.split(StringUtil.QR_CODE_SPLIT); List<String> hashList = new ArrayList<String>(); for (String str : stringArray) { if (!StringUtil.isEmpty(str)) { hashList.add(str); LogUtil.d("sign", str); } } for (int i = 0; i < tx.getInputs().size(); i++) { TransactionInput input = tx.getInputs().get(i); String str = hashList.get(i); input.setScriptSig(new Script(StringUtil.hexStringToByteArray(str))); input .getScriptSig() .correctlySpends(tx, i, input.getOutpoint().getConnectedOutput().getScriptPubKey(), true); } }