external_signer.cpp

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// Copyright (c) 2018-present The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
#include <bitcoin-build-config.h> // IWYU pragma: keep
 
#include <external_signer.h>
#include <rpc/register.h> // IWYU pragma: associated
 
#include <common/args.h>
#include <rpc/protocol.h>
#include <rpc/request.h>
#include <rpc/server.h>
#include <rpc/util.h>
#include <univalue.h>
 
#include <exception>
#include <string>
#include <utility>
#include <vector>
 
#ifdef ENABLE_EXTERNAL_SIGNER
 
static RPCMethod enumeratesigners()
{
    return RPCMethod{"enumeratesigners",
        "Returns a list of external signers from -signer. Signers with duplicate master key fingerprints are skipped.",
        {},
        RPCResult{
            RPCResult::Type::OBJ, "", "",
            {
                {RPCResult::Type::ARR, "signers", /*optional=*/false, "",
                {
                    {RPCResult::Type::OBJ, "", "",
                    {
                        {RPCResult::Type::STR_HEX, "fingerprint", "Master key fingerprint"},
                        {RPCResult::Type::STR, "name", "Device name, the model returned by the signer"},
                    }},
                },
                }
            }
        },
        RPCExamples{
            HelpExampleCli("enumeratesigners", "")
            + HelpExampleRpc("enumeratesigners", "")
        },
        [](const RPCMethod& self, const JSONRPCRequest& request) -> UniValue
        {
            const std::string command = gArgs.GetArg("-signer", "");
            if (command == "") throw JSONRPCError(RPC_MISC_ERROR, "Error: restart bitcoind with -signer=<cmd>");
            const std::string chain = gArgs.GetChainTypeString();
            UniValue signers_res = UniValue::VARR;
            try {
                std::vector<ExternalSigner> signers;
                ExternalSigner::Enumerate(command, signers, chain);
                for (const ExternalSigner& signer : signers) {
                    UniValue signer_res = UniValue::VOBJ;
                    signer_res.pushKV("fingerprint", signer.m_fingerprint);
                    signer_res.pushKV("name", signer.m_name);
                    signers_res.push_back(std::move(signer_res));
                }
            } catch (const std::exception& e) {
                throw JSONRPCError(RPC_MISC_ERROR, e.what());
            }
            UniValue result(UniValue::VOBJ);
            result.pushKV("signers", std::move(signers_res));
            return result;
        }
    };
}
 
void RegisterSignerRPCCommands(CRPCTable& t)
{
    static const CRPCCommand commands[]{
        {"signer", &enumeratesigners},
    };
    for (const auto& c : commands) {
        t.appendCommand(c.name, &c);
    }
}
 
#endif // ENABLE_EXTERNAL_SIGNER