diff options
Diffstat (limited to 'src/rpc')
| -rw-r--r-- | src/rpc/client.cpp | 1 | ||||
| -rw-r--r-- | src/rpc/mempool.cpp | 84 |
2 files changed, 85 insertions, 0 deletions
diff --git a/src/rpc/client.cpp b/src/rpc/client.cpp index 23e9d4074c..ae0d0112ba 100644 --- a/src/rpc/client.cpp +++ b/src/rpc/client.cpp @@ -173,6 +173,7 @@ static const CRPCConvertParam vRPCConvertParams[] = { "setwalletflag", 1, "value" }, { "getmempoolancestors", 1, "verbose" }, { "getmempooldescendants", 1, "verbose" }, + { "gettxspendingprevout", 0, "outputs" }, { "bumpfee", 1, "options" }, { "psbtbumpfee", 1, "options" }, { "logging", 0, "include" }, diff --git a/src/rpc/mempool.cpp b/src/rpc/mempool.cpp index 27080d3881..7ee3528a63 100644 --- a/src/rpc/mempool.cpp +++ b/src/rpc/mempool.cpp @@ -587,6 +587,89 @@ static RPCHelpMan getmempoolentry() }; } +static RPCHelpMan gettxspendingprevout() +{ + return RPCHelpMan{"gettxspendingprevout", + "Scans the mempool to find transactions spending any of the given outputs", + { + {"outputs", RPCArg::Type::ARR, RPCArg::Optional::NO, "The transaction outputs that we want to check, and within each, the txid (string) vout (numeric).", + { + {"", RPCArg::Type::OBJ, RPCArg::Optional::OMITTED, "", + { + {"txid", RPCArg::Type::STR_HEX, RPCArg::Optional::NO, "The transaction id"}, + {"vout", RPCArg::Type::NUM, RPCArg::Optional::NO, "The output number"}, + }, + }, + }, + }, + }, + RPCResult{ + RPCResult::Type::ARR, "", "", + { + {RPCResult::Type::OBJ, "", "", + { + {RPCResult::Type::STR_HEX, "txid", "the transaction id of the checked output"}, + {RPCResult::Type::NUM, "vout", "the vout value of the checked output"}, + {RPCResult::Type::STR_HEX, "spendingtxid", /*optional=*/true, "the transaction id of the mempool transaction spending this output (omitted if unspent)"}, + }}, + } + }, + RPCExamples{ + HelpExampleCli("gettxspendingprevout", "\"[{\\\"txid\\\":\\\"a08e6907dbbd3d809776dbfc5d82e371b764ed838b5655e72f463568df1aadf0\\\",\\\"vout\\\":3}]\"") + + HelpExampleRpc("gettxspendingprevout", "\"[{\\\"txid\\\":\\\"a08e6907dbbd3d809776dbfc5d82e371b764ed838b5655e72f463568df1aadf0\\\",\\\"vout\\\":3}]\"") + }, + [&](const RPCHelpMan& self, const JSONRPCRequest& request) -> UniValue + { + RPCTypeCheckArgument(request.params[0], UniValue::VARR); + const UniValue& output_params = request.params[0]; + if (output_params.empty()) { + throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid parameter, outputs are missing"); + } + + std::vector<COutPoint> prevouts; + prevouts.reserve(output_params.size()); + + for (unsigned int idx = 0; idx < output_params.size(); idx++) { + const UniValue& o = output_params[idx].get_obj(); + + RPCTypeCheckObj(o, + { + {"txid", UniValueType(UniValue::VSTR)}, + {"vout", UniValueType(UniValue::VNUM)}, + }, /*fAllowNull=*/false, /*fStrict=*/true); + + const uint256 txid(ParseHashO(o, "txid")); + const int nOutput = find_value(o, "vout").get_int(); + if (nOutput < 0) { + throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid parameter, vout cannot be negative"); + } + + prevouts.emplace_back(txid, nOutput); + } + + const CTxMemPool& mempool = EnsureAnyMemPool(request.context); + LOCK(mempool.cs); + + UniValue result{UniValue::VARR}; + + for (const COutPoint& prevout : prevouts) { + UniValue o(UniValue::VOBJ); + o.pushKV("txid", prevout.hash.ToString()); + o.pushKV("vout", (uint64_t)prevout.n); + + const CTransaction* spendingTx = mempool.GetConflictTx(prevout); + if (spendingTx != nullptr) { + o.pushKV("spendingtxid", spendingTx->GetHash().ToString()); + } + + result.push_back(o); + } + + return result; + }, + }; +} + UniValue MempoolInfoToJSON(const CTxMemPool& pool) { // Make sure this call is atomic in the pool. @@ -677,6 +760,7 @@ void RegisterMempoolRPCCommands(CRPCTable& t) {"blockchain", &getmempoolancestors}, {"blockchain", &getmempooldescendants}, {"blockchain", &getmempoolentry}, + {"blockchain", &gettxspendingprevout}, {"blockchain", &getmempoolinfo}, {"blockchain", &getrawmempool}, {"blockchain", &savemempool}, |