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bitcoin/src/rpc/client.cpp

516 lines
22 KiB
C++

// Copyright (c) 2010 Satoshi Nakamoto
// Copyright (c) 2009-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 <common/args.h>
#include <rpc/client.h>
#include <tinyformat.h>
#include <cstdint>
#include <set>
#include <string>
#include <string_view>
//! Specify whether parameter should be parsed by bitcoin-cli as a JSON value,
//! or passed unchanged as a string, or a combination of both.
enum ParamFormat { JSON, STRING, JSON_OR_STRING };
class CRPCConvertParam
{
public:
std::string methodName; //!< method whose params want conversion
int paramIdx; //!< 0-based idx of param to convert
std::string paramName; //!< parameter name
ParamFormat format{ParamFormat::JSON}; //!< parameter format
};
// clang-format off
/**
* Specify a (method, idx, name, format) here if the argument is a non-string RPC
* argument and needs to be converted from JSON, or if it is a string argument
* passed to a method that accepts '=' characters in any string arguments.
*
* JSON parameters need to be listed here to make bitcoin-cli parse command line
* arguments as JSON, instead of passing them as raw strings. `JSON` and
* `JSON_OR_STRING` formats both make `bitcoin-cli` attempt to parse the
* argument as JSON. But if parsing fails, the former triggers an error while
* the latter falls back to passing the argument as a raw string. This is
* useful for arguments like hash_or_height, allowing invocations such as
* `bitcoin-cli getblockstats <hash>` without needing to quote the hash string
* as JSON (`'"<hash>"'`).
*
* String parameters that may contain an '=' character (e.g. base64 strings,
* filenames, or labels) need to be listed here with format `ParamFormat::STRING`
* to make bitcoin-cli treat them as positional parameters when `-named` is used.
* This prevents `bitcoin-cli` from splitting strings like "my=wallet" into a named
* argument "my" and value "wallet" when the whole string is intended to be a
* single positional argument. And if one string parameter is listed for a method,
* other string parameters for that method need to be listed as well so bitcoin-cli
* does not make the opposite mistake and pass other arguments by position instead of
* name because it does not recognize their names. See \ref RPCConvertNamedValues
* for more information on how named and positional arguments are distinguished with
* -named.
*
* @note Parameter indexes start from 0.
*/
static const CRPCConvertParam vRPCConvertParams[] =
{
{ "setmocktime", 0, "timestamp" },
{ "mockscheduler", 0, "delta_time" },
{ "utxoupdatepsbt", 0, "psbt", ParamFormat::STRING },
{ "utxoupdatepsbt", 1, "descriptors" },
{ "generatetoaddress", 0, "nblocks" },
{ "generatetoaddress", 2, "maxtries" },
{ "generatetodescriptor", 0, "num_blocks" },
{ "generatetodescriptor", 2, "maxtries" },
{ "generateblock", 1, "transactions" },
{ "generateblock", 2, "submit" },
{ "getnetworkhashps", 0, "nblocks" },
{ "getnetworkhashps", 1, "height" },
{ "sendtoaddress", 0, "address", ParamFormat::STRING },
{ "sendtoaddress", 1, "amount" },
{ "sendtoaddress", 2, "comment", ParamFormat::STRING },
{ "sendtoaddress", 3, "comment_to", ParamFormat::STRING },
{ "sendtoaddress", 4, "subtractfeefromamount" },
{ "sendtoaddress", 5 , "replaceable" },
{ "sendtoaddress", 6 , "conf_target" },
{ "sendtoaddress", 7, "estimate_mode", ParamFormat::STRING },
{ "sendtoaddress", 8, "avoid_reuse" },
{ "sendtoaddress", 9, "fee_rate"},
{ "sendtoaddress", 10, "verbose"},
{ "settxfee", 0, "amount" },
{ "getreceivedbyaddress", 1, "minconf" },
{ "getreceivedbyaddress", 2, "include_immature_coinbase" },
{ "getreceivedbylabel", 0, "label", ParamFormat::STRING },
{ "getreceivedbylabel", 1, "minconf" },
{ "getreceivedbylabel", 2, "include_immature_coinbase" },
{ "listreceivedbyaddress", 0, "minconf" },
{ "listreceivedbyaddress", 1, "include_empty" },
{ "listreceivedbyaddress", 2, "include_watchonly" },
{ "listreceivedbyaddress", 4, "include_immature_coinbase" },
{ "listreceivedbylabel", 0, "minconf" },
{ "listreceivedbylabel", 1, "include_empty" },
{ "listreceivedbylabel", 2, "include_watchonly" },
{ "listreceivedbylabel", 3, "include_immature_coinbase" },
{ "getbalance", 1, "minconf" },
{ "getbalance", 2, "include_watchonly" },
{ "getbalance", 3, "avoid_reuse" },
{ "getblockfrompeer", 1, "peer_id" },
{ "getblockhash", 0, "height" },
{ "waitforblockheight", 0, "height" },
{ "waitforblockheight", 1, "timeout" },
{ "waitforblock", 1, "timeout" },
{ "waitfornewblock", 0, "timeout" },
{ "listtransactions", 0, "label", ParamFormat::STRING },
{ "listtransactions", 1, "count" },
{ "listtransactions", 2, "skip" },
{ "listtransactions", 3, "include_watchonly" },
{ "walletpassphrase", 0, "passphrase", ParamFormat::STRING },
{ "walletpassphrase", 1, "timeout" },
{ "getblocktemplate", 0, "template_request" },
{ "listsinceblock", 0, "blockhash", ParamFormat::STRING },
{ "listsinceblock", 1, "target_confirmations" },
{ "listsinceblock", 2, "include_watchonly" },
{ "listsinceblock", 3, "include_removed" },
{ "listsinceblock", 4, "include_change" },
{ "listsinceblock", 5, "label", ParamFormat::STRING },
{ "sendmany", 0, "dummy", ParamFormat::STRING },
{ "sendmany", 1, "amounts" },
{ "sendmany", 2, "minconf" },
{ "sendmany", 3, "comment", ParamFormat::STRING },
{ "sendmany", 4, "subtractfeefrom" },
{ "sendmany", 5 , "replaceable" },
{ "sendmany", 6 , "conf_target" },
{ "sendmany", 7, "estimate_mode", ParamFormat::STRING },
{ "sendmany", 8, "fee_rate"},
{ "sendmany", 9, "verbose" },
{ "deriveaddresses", 1, "range" },
{ "scanblocks", 1, "scanobjects" },
{ "scanblocks", 2, "start_height" },
{ "scanblocks", 3, "stop_height" },
{ "scanblocks", 5, "options" },
{ "scanblocks", 5, "filter_false_positives" },
{ "getdescriptoractivity", 0, "blockhashes" },
{ "getdescriptoractivity", 1, "scanobjects" },
{ "getdescriptoractivity", 2, "include_mempool" },
{ "scantxoutset", 1, "scanobjects" },
{ "createmultisig", 0, "nrequired" },
{ "createmultisig", 1, "keys" },
{ "listunspent", 0, "minconf" },
{ "listunspent", 1, "maxconf" },
{ "listunspent", 2, "addresses" },
{ "listunspent", 3, "include_unsafe" },
{ "listunspent", 4, "query_options" },
{ "listunspent", 4, "minimumAmount" },
{ "listunspent", 4, "maximumAmount" },
{ "listunspent", 4, "maximumCount" },
{ "listunspent", 4, "minimumSumAmount" },
{ "listunspent", 4, "include_immature_coinbase" },
{ "getblock", 1, "verbosity" },
{ "getblock", 1, "verbose" },
{ "getblockheader", 1, "verbose" },
{ "getchaintxstats", 0, "nblocks" },
{ "gettransaction", 1, "include_watchonly" },
{ "gettransaction", 2, "verbose" },
{ "getrawtransaction", 1, "verbosity" },
{ "getrawtransaction", 1, "verbose" },
{ "createrawtransaction", 0, "inputs" },
{ "createrawtransaction", 1, "outputs" },
{ "createrawtransaction", 2, "locktime" },
{ "createrawtransaction", 3, "replaceable" },
{ "createrawtransaction", 4, "version" },
{ "decoderawtransaction", 1, "iswitness" },
{ "signrawtransactionwithkey", 1, "privkeys" },
{ "signrawtransactionwithkey", 2, "prevtxs" },
{ "signrawtransactionwithwallet", 1, "prevtxs" },
{ "sendrawtransaction", 1, "maxfeerate" },
{ "sendrawtransaction", 2, "maxburnamount" },
{ "testmempoolaccept", 0, "rawtxs" },
{ "testmempoolaccept", 1, "maxfeerate" },
{ "submitpackage", 0, "package" },
{ "submitpackage", 1, "maxfeerate" },
{ "submitpackage", 2, "maxburnamount" },
{ "combinerawtransaction", 0, "txs" },
{ "fundrawtransaction", 1, "options" },
{ "fundrawtransaction", 1, "add_inputs"},
{ "fundrawtransaction", 1, "include_unsafe"},
{ "fundrawtransaction", 1, "minconf"},
{ "fundrawtransaction", 1, "maxconf"},
{ "fundrawtransaction", 1, "changePosition"},
{ "fundrawtransaction", 1, "includeWatching"},
{ "fundrawtransaction", 1, "lockUnspents"},
{ "fundrawtransaction", 1, "fee_rate"},
{ "fundrawtransaction", 1, "feeRate"},
{ "fundrawtransaction", 1, "subtractFeeFromOutputs"},
{ "fundrawtransaction", 1, "input_weights"},
{ "fundrawtransaction", 1, "conf_target"},
{ "fundrawtransaction", 1, "replaceable"},
{ "fundrawtransaction", 1, "solving_data"},
{ "fundrawtransaction", 1, "max_tx_weight"},
{ "fundrawtransaction", 2, "iswitness" },
{ "walletcreatefundedpsbt", 0, "inputs" },
{ "walletcreatefundedpsbt", 1, "outputs" },
{ "walletcreatefundedpsbt", 2, "locktime" },
{ "walletcreatefundedpsbt", 3, "options" },
{ "walletcreatefundedpsbt", 3, "add_inputs"},
{ "walletcreatefundedpsbt", 3, "include_unsafe"},
{ "walletcreatefundedpsbt", 3, "minconf"},
{ "walletcreatefundedpsbt", 3, "maxconf"},
{ "walletcreatefundedpsbt", 3, "changePosition"},
{ "walletcreatefundedpsbt", 3, "includeWatching"},
{ "walletcreatefundedpsbt", 3, "lockUnspents"},
{ "walletcreatefundedpsbt", 3, "fee_rate"},
{ "walletcreatefundedpsbt", 3, "feeRate"},
{ "walletcreatefundedpsbt", 3, "subtractFeeFromOutputs"},
{ "walletcreatefundedpsbt", 3, "conf_target"},
{ "walletcreatefundedpsbt", 3, "replaceable"},
{ "walletcreatefundedpsbt", 3, "solving_data"},
{ "walletcreatefundedpsbt", 3, "max_tx_weight"},
{ "walletcreatefundedpsbt", 4, "bip32derivs" },
{ "walletcreatefundedpsbt", 5, "version" },
{ "walletprocesspsbt", 0, "psbt", ParamFormat::STRING },
{ "walletprocesspsbt", 1, "sign" },
{ "walletprocesspsbt", 2, "sighashtype", ParamFormat::STRING },
{ "walletprocesspsbt", 3, "bip32derivs" },
{ "walletprocesspsbt", 4, "finalize" },
{ "descriptorprocesspsbt", 0, "psbt", ParamFormat::STRING },
{ "descriptorprocesspsbt", 1, "descriptors"},
{ "descriptorprocesspsbt", 2, "sighashtype", ParamFormat::STRING },
{ "descriptorprocesspsbt", 3, "bip32derivs" },
{ "descriptorprocesspsbt", 4, "finalize" },
{ "createpsbt", 0, "inputs" },
{ "createpsbt", 1, "outputs" },
{ "createpsbt", 2, "locktime" },
{ "createpsbt", 3, "replaceable" },
{ "createpsbt", 4, "version" },
{ "combinepsbt", 0, "txs"},
{ "joinpsbts", 0, "txs"},
{ "finalizepsbt", 0, "psbt", ParamFormat::STRING },
{ "finalizepsbt", 1, "extract"},
{ "converttopsbt", 1, "permitsigdata"},
{ "converttopsbt", 2, "iswitness"},
{ "gettxout", 1, "n" },
{ "gettxout", 2, "include_mempool" },
{ "gettxoutproof", 0, "txids" },
{ "gettxoutsetinfo", 1, "hash_or_height", ParamFormat::JSON_OR_STRING },
{ "gettxoutsetinfo", 2, "use_index"},
{ "dumptxoutset", 0, "path", ParamFormat::STRING },
{ "dumptxoutset", 1, "type", ParamFormat::STRING },
{ "dumptxoutset", 2, "options" },
{ "dumptxoutset", 2, "rollback", ParamFormat::JSON_OR_STRING },
{ "lockunspent", 0, "unlock" },
{ "lockunspent", 1, "transactions" },
{ "lockunspent", 2, "persistent" },
{ "send", 0, "outputs" },
{ "send", 1, "conf_target" },
{ "send", 3, "fee_rate"},
{ "send", 4, "options" },
{ "send", 4, "add_inputs"},
{ "send", 4, "include_unsafe"},
{ "send", 4, "minconf"},
{ "send", 4, "maxconf"},
{ "send", 4, "add_to_wallet"},
{ "send", 4, "change_position"},
{ "send", 4, "fee_rate"},
{ "send", 4, "include_watching"},
{ "send", 4, "inputs"},
{ "send", 4, "locktime"},
{ "send", 4, "lock_unspents"},
{ "send", 4, "psbt"},
{ "send", 4, "subtract_fee_from_outputs"},
{ "send", 4, "conf_target"},
{ "send", 4, "replaceable"},
{ "send", 4, "solving_data"},
{ "send", 4, "max_tx_weight"},
{ "send", 5, "version"},
{ "sendall", 0, "recipients" },
{ "sendall", 1, "conf_target" },
{ "sendall", 3, "fee_rate"},
{ "sendall", 4, "options" },
{ "sendall", 4, "add_to_wallet"},
{ "sendall", 4, "fee_rate"},
{ "sendall", 4, "include_watching"},
{ "sendall", 4, "inputs"},
{ "sendall", 4, "locktime"},
{ "sendall", 4, "lock_unspents"},
{ "sendall", 4, "psbt"},
{ "sendall", 4, "send_max"},
{ "sendall", 4, "minconf"},
{ "sendall", 4, "maxconf"},
{ "sendall", 4, "conf_target"},
{ "sendall", 4, "replaceable"},
{ "sendall", 4, "solving_data"},
{ "sendall", 4, "version"},
{ "simulaterawtransaction", 0, "rawtxs" },
{ "simulaterawtransaction", 1, "options" },
{ "simulaterawtransaction", 1, "include_watchonly"},
{ "importmempool", 0, "filepath", ParamFormat::STRING },
{ "importmempool", 1, "options" },
{ "importmempool", 1, "apply_fee_delta_priority" },
{ "importmempool", 1, "use_current_time" },
{ "importmempool", 1, "apply_unbroadcast_set" },
{ "importdescriptors", 0, "requests" },
{ "listdescriptors", 0, "private" },
{ "verifychain", 0, "checklevel" },
{ "verifychain", 1, "nblocks" },
{ "getblockstats", 0, "hash_or_height", ParamFormat::JSON_OR_STRING },
{ "getblockstats", 1, "stats" },
{ "pruneblockchain", 0, "height" },
{ "keypoolrefill", 0, "newsize" },
{ "getrawmempool", 0, "verbose" },
{ "getrawmempool", 1, "mempool_sequence" },
{ "getorphantxs", 0, "verbosity" },
{ "estimatesmartfee", 0, "conf_target" },
{ "estimaterawfee", 0, "conf_target" },
{ "estimaterawfee", 1, "threshold" },
{ "prioritisetransaction", 1, "dummy" },
{ "prioritisetransaction", 2, "fee_delta" },
{ "setban", 2, "bantime" },
{ "setban", 3, "absolute" },
{ "setnetworkactive", 0, "state" },
{ "setwalletflag", 1, "value" },
{ "getmempoolancestors", 1, "verbose" },
{ "getmempooldescendants", 1, "verbose" },
{ "gettxspendingprevout", 0, "outputs" },
{ "bumpfee", 1, "options" },
{ "bumpfee", 1, "conf_target"},
{ "bumpfee", 1, "fee_rate"},
{ "bumpfee", 1, "replaceable"},
{ "bumpfee", 1, "outputs"},
{ "bumpfee", 1, "original_change_index"},
{ "psbtbumpfee", 1, "options" },
{ "psbtbumpfee", 1, "conf_target"},
{ "psbtbumpfee", 1, "fee_rate"},
{ "psbtbumpfee", 1, "replaceable"},
{ "psbtbumpfee", 1, "outputs"},
{ "psbtbumpfee", 1, "original_change_index"},
{ "logging", 0, "include" },
{ "logging", 1, "exclude" },
{ "disconnectnode", 1, "nodeid" },
{ "gethdkeys", 0, "active_only" },
{ "gethdkeys", 0, "options" },
{ "gethdkeys", 0, "private" },
{ "createwalletdescriptor", 1, "options" },
{ "createwalletdescriptor", 1, "internal" },
// Echo with conversion (For testing only)
{ "echojson", 0, "arg0" },
{ "echojson", 1, "arg1" },
{ "echojson", 2, "arg2" },
{ "echojson", 3, "arg3" },
{ "echojson", 4, "arg4" },
{ "echojson", 5, "arg5" },
{ "echojson", 6, "arg6" },
{ "echojson", 7, "arg7" },
{ "echojson", 8, "arg8" },
{ "echojson", 9, "arg9" },
{ "rescanblockchain", 0, "start_height"},
{ "rescanblockchain", 1, "stop_height"},
{ "createwallet", 0, "wallet_name", ParamFormat::STRING },
{ "createwallet", 1, "disable_private_keys"},
{ "createwallet", 2, "blank"},
{ "createwallet", 3, "passphrase", ParamFormat::STRING },
{ "createwallet", 4, "avoid_reuse"},
{ "createwallet", 5, "descriptors"},
{ "createwallet", 6, "load_on_startup"},
{ "createwallet", 7, "external_signer"},
{ "restorewallet", 0, "wallet_name", ParamFormat::STRING },
{ "restorewallet", 1, "backup_file", ParamFormat::STRING },
{ "restorewallet", 2, "load_on_startup"},
{ "loadwallet", 0, "filename", ParamFormat::STRING },
{ "loadwallet", 1, "load_on_startup"},
{ "unloadwallet", 0, "wallet_name", ParamFormat::STRING },
{ "unloadwallet", 1, "load_on_startup"},
{ "getnodeaddresses", 0, "count"},
{ "addpeeraddress", 1, "port"},
{ "addpeeraddress", 2, "tried"},
{ "sendmsgtopeer", 0, "peer_id" },
{ "stop", 0, "wait" },
{ "addnode", 2, "v2transport" },
{ "addconnection", 2, "v2transport" },
{ "decodepsbt", 0, "psbt", ParamFormat::STRING },
{ "analyzepsbt", 0, "psbt", ParamFormat::STRING},
{ "verifymessage", 1, "signature", ParamFormat::STRING },
{ "verifymessage", 2, "message", ParamFormat::STRING },
{ "getnewaddress", 0, "label", ParamFormat::STRING },
{ "getnewaddress", 1, "address_type", ParamFormat::STRING },
{ "backupwallet", 0, "destination", ParamFormat::STRING },
{ "echoipc", 0, "arg", ParamFormat::STRING },
{ "encryptwallet", 0, "passphrase", ParamFormat::STRING },
{ "getaddressesbylabel", 0, "label", ParamFormat::STRING },
{ "loadtxoutset", 0, "path", ParamFormat::STRING },
{ "migratewallet", 0, "wallet_name", ParamFormat::STRING },
{ "migratewallet", 1, "passphrase", ParamFormat::STRING },
{ "setlabel", 1, "label", ParamFormat::STRING },
{ "signmessage", 1, "message", ParamFormat::STRING },
{ "signmessagewithprivkey", 1, "message", ParamFormat::STRING },
{ "walletpassphrasechange", 0, "oldpassphrase", ParamFormat::STRING },
{ "walletpassphrasechange", 1, "newpassphrase", ParamFormat::STRING },
};
// clang-format on
/** Parse string to UniValue or throw runtime_error if string contains invalid JSON */
static UniValue Parse(std::string_view raw, ParamFormat format = ParamFormat::JSON)
{
UniValue parsed;
if (!parsed.read(raw)) {
if (format != ParamFormat::JSON_OR_STRING) throw std::runtime_error(tfm::format("Error parsing JSON: %s", raw));
return UniValue(std::string(raw));
}
return parsed;
}
namespace rpc_convert
{
const CRPCConvertParam* FromPosition(std::string_view method, size_t pos)
{
auto it = std::ranges::find_if(vRPCConvertParams, [&](const auto& p) {
return p.methodName == method && p.paramIdx == static_cast<int>(pos);
});
return it == std::end(vRPCConvertParams) ? nullptr : &*it;
}
const CRPCConvertParam* FromName(std::string_view method, std::string_view name)
{
auto it = std::ranges::find_if(vRPCConvertParams, [&](const auto& p) {
return p.methodName == method && p.paramName == name;
});
return it == std::end(vRPCConvertParams) ? nullptr : &*it;
}
} // namespace rpc_convert
static UniValue ParseParam(const CRPCConvertParam* param, std::string_view raw)
{
// Only parse parameters which have the JSON or JSON_OR_STRING format; otherwise, treat them as strings.
return (param && (param->format == ParamFormat::JSON || param->format == ParamFormat::JSON_OR_STRING)) ? Parse(raw, param->format) : UniValue(std::string(raw));
}
/**
* Convert command lines arguments to params object when -named is disabled.
*/
UniValue RPCConvertValues(const std::string &strMethod, const std::vector<std::string> &strParams)
{
UniValue params(UniValue::VARR);
for (std::string_view s : strParams) {
params.push_back(ParseParam(rpc_convert::FromPosition(strMethod, params.size()), s));
}
return params;
}
/**
* Convert command line arguments to params object when -named is enabled.
*
* The -named syntax accepts named arguments in NAME=VALUE format, as well as
* positional arguments without names. The syntax is inherently ambiguous if
* names are omitted and values contain '=', so a heuristic is used to
* disambiguate:
*
* - Arguments that do not contain '=' are treated as positional parameters.
*
* - Arguments that do contain '=' are assumed to be named parameters in
* NAME=VALUE format except for two special cases:
*
* 1. The case where NAME is not a known parameter name, and the next
* positional parameter requires a JSON value, and the argument parses as
* JSON. E.g. ["list", "with", "="].
*
* 2. The case where NAME is not a known parameter name and the next
* positional parameter requires a string value. E.g. "my=wallet".
*
* For example, the command `bitcoin-cli -named createwallet "my=wallet"`,
* the parser initially sees "my=wallet" and attempts to process it as a
* parameter named "my". When it finds that "my" is not a valid named parameter
* parameter for this method, it falls back to checking the rule for the
* next available positional parameter (index 0). Because it finds the rule
* that this parameter is a ParamFormat::STRING, it correctly treats the entire
* "my=wallet" as a single positional string, successfully creating a
* wallet with that literal name.
*/
UniValue RPCConvertNamedValues(const std::string &strMethod, const std::vector<std::string> &strParams)
{
UniValue params(UniValue::VOBJ);
UniValue positional_args{UniValue::VARR};
for (std::string_view s: strParams) {
size_t pos = s.find('=');
if (pos == std::string_view::npos) {
positional_args.push_back(ParseParam(rpc_convert::FromPosition(strMethod, positional_args.size()), s));
continue;
}
std::string name{s.substr(0, pos)};
std::string_view value{s.substr(pos+1)};
const CRPCConvertParam* named_param{rpc_convert::FromName(strMethod, name)};
if (!named_param) {
const CRPCConvertParam* positional_param = rpc_convert::FromPosition(strMethod, positional_args.size());
UniValue parsed_value;
if (positional_param && positional_param->format == ParamFormat::JSON && parsed_value.read(s)) {
positional_args.push_back(std::move(parsed_value));
continue;
} else if (positional_param && positional_param->format == ParamFormat::STRING) {
positional_args.push_back(s);
continue;
}
}
// Intentionally overwrite earlier named values with later ones as a
// convenience for scripts and command line users that want to merge
// options.
params.pushKV(name, ParseParam(named_param, value));
}
if (!positional_args.empty()) {
// Use pushKVEnd instead of pushKV to avoid overwriting an explicit
// "args" value with an implicit one. Let the RPC server handle the
// request as given.
params.pushKVEnd("args", std::move(positional_args));
}
return params;
}