Function getblockfilter

src/rpc/blockchain.cpp:2967–3042

}

static RPCMethod getblockfilter()
{
    return RPCMethod{
        "getblockfilter",
        "Retrieve a BIP 157 content filter for a particular block.\n",
                {
                    {"blockhash", RPCArg::Type::STR_HEX, RPCArg::Optional::NO, "The hash of the block"},
                    {"filtertype", RPCArg::Type::STR, RPCArg::Default{BlockFilterTypeName(BlockFilterType::BASIC)}, "The type name of the filter"},
                },
                RPCResult{
                    RPCResult::Type::OBJ, "", "",
                    {
                        {RPCResult::Type::STR_HEX, "filter", "the hex-encoded filter data"},
                        {RPCResult::Type::STR_HEX, "header", "the hex-encoded filter header"},
                    }},
                RPCExamples{
                    HelpExampleCli("getblockfilter", "\"00000000c937983704a73af28acdec37b049d214adbda81d7e2a3dd146f6ed09\" \"basic\"") +
                    HelpExampleRpc("getblockfilter", "\"00000000c937983704a73af28acdec37b049d214adbda81d7e2a3dd146f6ed09\", \"basic\"")
                },
        [](const RPCMethod& self, const JSONRPCRequest& request) -> UniValue
{
    uint256 block_hash = ParseHashV(request.params[0], "blockhash");
    auto filtertype_name{self.Arg<std::string_view>("filtertype")};

    BlockFilterType filtertype;
    if (!BlockFilterTypeByName(filtertype_name, filtertype)) {
        throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Unknown filtertype");
    }

    BlockFilterIndex* index = GetBlockFilterIndex(filtertype);
    if (!index) {
        throw JSONRPCError(RPC_MISC_ERROR, tfm::format("Index is not enabled for filtertype %s", filtertype_name));
    }

    const CBlockIndex* block_index;
    bool block_was_connected;
    {
        ChainstateManager& chainman = EnsureAnyChainman(request.context);
        LOCK(cs_main);
        block_index = chainman.m_blockman.LookupBlockIndex(block_hash);
        if (!block_index) {
            throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Block not found");
        }
        block_was_connected = block_index->IsValid(BLOCK_VALID_SCRIPTS);
    }

    bool index_ready = index->BlockUntilSyncedToCurrentChain();

    BlockFilter filter;
    uint256 filter_header;
    if (!index->LookupFilter(block_index, filter) ||
        !index->LookupFilterHeader(block_index, filter_header)) {
        int err_code;
        std::string errmsg = "Filter not found.";

        if (!block_was_connected) {
            err_code = RPC_INVALID_ADDRESS_OR_KEY;
            errmsg += " Block was not connected to active chain.";