Function verifytxoutproof

src/rpc/txoutproof.cpp:129–175

}

static RPCMethod verifytxoutproof()
{
    return RPCMethod{
        "verifytxoutproof",
        "Verifies that a proof points to a transaction in a block, returning the transaction it commits to\n"
        "and throwing an RPC error if the block is not in our best chain\n",
        {
            {"proof", RPCArg::Type::STR_HEX, RPCArg::Optional::NO, "The hex-encoded proof generated by gettxoutproof"},
        },
        RPCResult{
            RPCResult::Type::ARR, "", "",
            {
                {RPCResult::Type::STR_HEX, "txid", "The txid(s) which the proof commits to, or empty array if the proof cannot be validated."},
            }
        },
        RPCExamples{""},
        [](const RPCMethod& self, const JSONRPCRequest& request) -> UniValue
        {
            CMerkleBlock merkleBlock;
            SpanReader{ParseHexV(request.params[0], "proof")} >> merkleBlock;

            UniValue res(UniValue::VARR);

            std::vector<Txid> vMatch;
            std::vector<unsigned int> vIndex;
            if (merkleBlock.txn.ExtractMatches(vMatch, vIndex) != merkleBlock.header.hashMerkleRoot)
                return res;

            ChainstateManager& chainman = EnsureAnyChainman(request.context);
            LOCK(cs_main);

            const CBlockIndex* pindex = chainman.m_blockman.LookupBlockIndex(merkleBlock.header.GetHash());
            if (!pindex || !chainman.ActiveChain().Contains(*pindex) || pindex->nTx == 0) {
                throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Block not found in chain");
            }

            // Check if proof is valid, only add results if so
            if (pindex->nTx == merkleBlock.txn.GetNumTransactions()) {
                for (const auto& txid : vMatch) {
                    res.push_back(txid.GetHex());
                }
            }

            return res;
        },
    };
}

void RegisterTxoutProofRPCCommands(CRPCTable& t)
{