Function submitblock

src/rpc/mining.cpp:770–842

};

static UniValue submitblock(const JSONRPCRequest& request)
{
    // We allow 2 arguments for compliance with BIP22. Argument 2 is ignored.
    if (request.fHelp || request.params.size() < 1 || request.params.size() > 3) {
        throw std::runtime_error(
            "submitblock \"hexdata\"  ( \"dummy\" \"legacy\" )\n"
            "\nAttempts to submit new block to network.\n"
            "See https://en.bitcoin.it/wiki/BIP_0022 for full specification.\n"

            "\nArguments\n"
            "1. \"hexdata\"        (string, required) the hex-encoded block data to submit\n"
            "2. \"dummy\"          (optional) dummy value, for compatibility with BIP22. This value is ignored.\n"
            "3. \"legacy\"         (boolean, optional) indicates if the block is in legacy foramt. default: false.\n"
            "\nResult:\n"
            "\nExamples:\n"
            + HelpExampleCli("submitblock", "\"mydata\"")
            + HelpExampleRpc("submitblock", "\"mydata\"")
        );
    }

    std::shared_ptr<CBlock> blockptr = std::make_shared<CBlock>();
    CBlock& block = *blockptr;
    bool legacy_format = false;
    if (request.params.size() == 3 && request.params[2].get_bool() == true) {
        legacy_format = true;
    }
    if (!DecodeHexBlk(block, request.params[0].get_str(), legacy_format)) {
        throw JSONRPCError(RPC_DESERIALIZATION_ERROR, "Block decode failed");
    }

    if (block.vtx.empty() || !block.vtx[0]->IsCoinBase()) {
        throw JSONRPCError(RPC_DESERIALIZATION_ERROR, "Block does not start with a coinbase");
    }

    uint256 hash = block.GetHash();
    {
        LOCK(cs_main);
        const CBlockIndex* pindex = LookupBlockIndex(hash);
        if (pindex) {
            if (pindex->IsValid(BLOCK_VALID_SCRIPTS)) {
                return "duplicate";
            }
            if (pindex->nStatus & BLOCK_FAILED_MASK) {
                return "duplicate-invalid";
            }
        }
    }

    {
        LOCK(cs_main);
        const CBlockIndex* pindex = LookupBlockIndex(block.hashPrevBlock);
        if (pindex) {
            UpdateUncommittedBlockStructures(block, pindex, Params().GetConsensus());
        }
    }

    bool new_block;
    submitblock_StateCatcher sc(block.GetHash());