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Added /redeem/LITECOIN/{ataddress} API

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This is the equivalent of the refund API but can be used by the seller to redeem LTC from a stuck transaction, by supplying the associated AT address, There are no lockTime requirements; it is redeemable as soon as the buyer has redeemed the QORT and sent the secret to the seller.
This commit is contained in:
CalDescent 2021-05-22 13:59:00 +01:00
parent 39575e8542
commit 0b36b650a4
1 changed files with 93 additions and 19 deletions
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112
src/main/java/org/qortal/api/resource/CrossChainHtlcResource.java
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@ -178,8 +178,10 @@ public class CrossChainHtlcResource {
@GET
@Path("/redeem/LITECOIN/{ataddress}/{tradePrivateKey}/{secret}/{receivingAddress}")
@Operation(
summary = "Redeems HTLC associated with supplied AT",
description = "Secret should be 32 bytes (base58 encoded).",
summary = "Redeems HTLC associated with supplied AT, using private key, secret, and receiving address",
description = "Secret and private key should be 32 bytes (base58 encoded). Receiving address must be a valid LTC P2PKH address.<br>" +
"The secret can be found in Alice's trade bot data or in the message to Bob's AT.<br>" +
"The trade private key and receiving address can be found in Bob's trade bot data.",
responses = {
@ApiResponse(
content = @Content(mediaType = MediaType.TEXT_PLAIN, schema = @Schema(type = "boolean"))
@ -193,6 +195,46 @@ public class CrossChainHtlcResource {
@PathParam("receivingAddress") String receivingAddress) {
Security.checkApiCallAllowed(request);
// base58 decode the trade private key
byte[] decodedTradePrivateKey = null;
if (tradePrivateKey != null)
decodedTradePrivateKey = Base58.decode(tradePrivateKey);
// base58 decode the secret
byte[] decodedSecret = null;
if (secret != null)
decodedSecret = Base58.decode(secret);
// Convert supplied Litecoin receiving address into public key hash (we only support P2PKH at this time)
Address litecoinReceivingAddress;
try {
litecoinReceivingAddress = Address.fromString(Litecoin.getInstance().getNetworkParameters(), receivingAddress);
} catch (AddressFormatException e) {
throw ApiExceptionFactory.INSTANCE.createException(request, ApiError.INVALID_CRITERIA);
}
if (litecoinReceivingAddress.getOutputScriptType() != Script.ScriptType.P2PKH)
throw ApiExceptionFactory.INSTANCE.createException(request, ApiError.INVALID_CRITERIA);
byte[] litecoinReceivingAccountInfo = litecoinReceivingAddress.getHash();
return this.doRedeemHtlc(atAddress, decodedTradePrivateKey, decodedSecret, litecoinReceivingAccountInfo);
}
@GET
@Path("/redeem/LITECOIN/{ataddress}")
@Operation(
summary = "Redeems HTLC associated with supplied AT",
description = "To be used by a seller (Bob) who needs to redeem LTC proceeds that are stuck in a P2SH.",
responses = {
@ApiResponse(
content = @Content(mediaType = MediaType.TEXT_PLAIN, schema = @Schema(type = "boolean"))
)
}
)
@ApiErrors({ApiError.INVALID_CRITERIA, ApiError.INVALID_ADDRESS, ApiError.ADDRESS_UNKNOWN})
public boolean redeemHtlc(@PathParam("ataddress") String atAddress) {
Security.checkApiCallAllowed(request);
try (final Repository repository = RepositoryManager.getRepository()) {
ATData atData = repository.getATRepository().fromATAddress(atAddress);
if (atData == null)
@ -206,26 +248,58 @@ public class CrossChainHtlcResource {
if (crossChainTradeData == null)
throw ApiExceptionFactory.INSTANCE.createException(request, ApiError.INVALID_CRITERIA);
byte[] decodedSecret = Base58.decode(secret);
if (decodedSecret.length != 32)
throw ApiExceptionFactory.INSTANCE.createException(request, ApiError.INVALID_CRITERIA);
byte[] decodedPrivateKey = Base58.decode(tradePrivateKey);
if (decodedPrivateKey.length != 32)
throw ApiExceptionFactory.INSTANCE.createException(request, ApiError.INVALID_CRITERIA);
// Convert Litecoin receiving address into public key hash (we only support P2PKH at this time)
Address litecoinReceivingAddress;
try {
litecoinReceivingAddress = Address.fromString(Litecoin.getInstance().getNetworkParameters(), receivingAddress);
} catch (AddressFormatException e) {
// Attempt to find secret from the buyer's message to AT
byte[] decodedSecret = LitecoinACCTv1.findSecretA(repository, crossChainTradeData);
if (decodedSecret == null) {
LOGGER.info(() -> String.format("Unable to find secret-A from redeem message to AT %s", atAddress));
throw ApiExceptionFactory.INSTANCE.createException(request, ApiError.INVALID_CRITERIA);
}
if (litecoinReceivingAddress.getOutputScriptType() != Script.ScriptType.P2PKH)
List<TradeBotData> allTradeBotData = repository.getCrossChainRepository().getAllTradeBotData();
TradeBotData tradeBotData = allTradeBotData.stream().filter(tradeBotDataItem -> tradeBotDataItem.getAtAddress().equals(atAddress)).findFirst().orElse(null);
// Search for the tradePrivateKey in the tradebot data
byte[] decodedPrivateKey = null;
if (tradeBotData != null)
decodedPrivateKey = tradeBotData.getTradePrivateKey();
// Search for the litecoin receiving address in the tradebot data
byte[] litecoinReceivingAccountInfo = null;
if (tradeBotData != null)
// Use receiving address PKH from tradebot data
litecoinReceivingAccountInfo = tradeBotData.getReceivingAccountInfo();
return this.doRedeemHtlc(atAddress, decodedPrivateKey, decodedSecret, litecoinReceivingAccountInfo);
} catch (DataException e) {
throw ApiExceptionFactory.INSTANCE.createException(request, ApiError.REPOSITORY_ISSUE, e);
}
}
private boolean doRedeemHtlc(String atAddress, byte[] decodedTradePrivateKey, byte[] decodedSecret, byte[] litecoinReceivingAccountInfo) {
try (final Repository repository = RepositoryManager.getRepository()) {
ATData atData = repository.getATRepository().fromATAddress(atAddress);
if (atData == null)
throw ApiExceptionFactory.INSTANCE.createException(request, ApiError.ADDRESS_UNKNOWN);
ACCT acct = SupportedBlockchain.getAcctByCodeHash(atData.getCodeHash());
if (acct == null)
throw ApiExceptionFactory.INSTANCE.createException(request, ApiError.INVALID_CRITERIA);
byte[] litecoinReceivingAccountInfo = litecoinReceivingAddress.getHash();
if (litecoinReceivingAccountInfo.length != 20)
CrossChainTradeData crossChainTradeData = acct.populateTradeData(repository, atData);
if (crossChainTradeData == null)
throw ApiExceptionFactory.INSTANCE.createException(request, ApiError.INVALID_CRITERIA);
// Validate trade private key
if (decodedTradePrivateKey == null || decodedTradePrivateKey.length != 32)
throw ApiExceptionFactory.INSTANCE.createException(request, ApiError.INVALID_CRITERIA);
// Validate secret
if (decodedSecret == null || decodedSecret.length != 32)
throw ApiExceptionFactory.INSTANCE.createException(request, ApiError.INVALID_CRITERIA);
// Validate receiving address
if (litecoinReceivingAccountInfo == null || litecoinReceivingAccountInfo.length != 20)
throw ApiExceptionFactory.INSTANCE.createException(request, ApiError.INVALID_CRITERIA);
@ -261,7 +335,7 @@ public class CrossChainHtlcResource {
case FUNDED: {
Coin redeemAmount = Coin.valueOf(crossChainTradeData.expectedForeignAmount);
ECKey redeemKey = ECKey.fromPrivate(decodedPrivateKey);
ECKey redeemKey = ECKey.fromPrivate(decodedTradePrivateKey);
List<TransactionOutput> fundingOutputs = litecoin.getUnspentOutputs(p2shAddressA);
Transaction p2shRedeemTransaction = BitcoinyHTLC.buildRedeemTransaction(litecoin.getNetworkParameters(), redeemAmount, redeemKey,