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// Copyright (c) 2017-2019 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#ifndef BITCOIN_RPC_UTIL_H
#define BITCOIN_RPC_UTIL_H
#include <node/transaction.h>
#include <pubkey.h>
#include <rpc/protocol.h>
#include <script/standard.h>
#include <univalue.h>
#include <string>
#include <vector>
#include <boost/variant.hpp>
class CKeyStore;
class CPubKey;
class CScript;
struct InitInterfaces;
//! Pointers to interfaces that need to be accessible from RPC methods. Due to
//! limitations of the RPC framework, there's currently no direct way to pass in
//! state to RPC method implementations.
extern InitInterfaces* g_rpc_interfaces;
CPubKey HexToPubKey(const std::string& hex_in);
CPubKey AddrToPubKey(CKeyStore* const keystore, const std::string& addr_in);
CScript CreateMultisigRedeemscript(const int required, const std::vector<CPubKey>& pubkeys);
UniValue DescribeAddress(const CTxDestination& dest);
//! Parse a confirm target option and raise an RPC error if it is invalid.
unsigned int ParseConfirmTarget(const UniValue& value);
RPCErrorCode RPCErrorFromTransactionError(TransactionError terr);
UniValue JSONRPCTransactionError(TransactionError terr, const std::string& err_string = "");
//! Parse a JSON range specified as int64, or [int64, int64]
std::pair<int64_t, int64_t> ParseRange(const UniValue& value);
struct RPCArg {
enum class Type {
OBJ,
ARR,
STR,
NUM,
BOOL,
OBJ_USER_KEYS, //!< Special type where the user must set the keys e.g. to define multiple addresses; as opposed to e.g. an options object where the keys are predefined
AMOUNT, //!< Special type representing a floating point amount (can be either NUM or STR)
STR_HEX, //!< Special type that is a STR with only hex chars
};
enum class Optional {
/** Required arg */
NO,
/**
* Optional arg that is a named argument and has a default value of
* `null`. When possible, the default value should be specified.
*/
OMITTED_NAMED_ARG,
/**
* Optional argument with default value omitted because they are
* implicitly clear. That is, elements in an array or object may not
* exist by default.
* When possible, the default value should be specified.
*/
OMITTED,
};
using Fallback = boost::variant<Optional, /* default value for optional args */ std::string>;
const std::string m_name; //!< The name of the arg (can be empty for inner args)
const Type m_type;
const std::vector<RPCArg> m_inner; //!< Only used for arrays or dicts
const Fallback m_fallback;
const std::string m_description;
const std::string m_oneline_description; //!< Should be empty unless it is supposed to override the auto-generated summary line
const std::vector<std::string> m_type_str; //!< Should be empty unless it is supposed to override the auto-generated type strings. Vector length is either 0 or 2, m_type_str.at(0) will override the type of the value in a key-value pair, m_type_str.at(1) will override the type in the argument description.
RPCArg(
const std::string& name,
const Type& type,
const Fallback& fallback,
const std::string& description,
const std::string& oneline_description = "",
const std::vector<std::string>& type_str = {})
: m_name{name},
m_type{type},
m_fallback{fallback},
m_description{description},
m_oneline_description{oneline_description},
m_type_str{type_str}
{
assert(type != Type::ARR && type != Type::OBJ);
}
RPCArg(
const std::string& name,
const Type& type,
const Fallback& fallback,
const std::string& description,
const std::vector<RPCArg>& inner,
const std::string& oneline_description = "",
const std::vector<std::string>& type_str = {})
: m_name{name},
m_type{type},
m_inner{inner},
m_fallback{fallback},
m_description{description},
m_oneline_description{oneline_description},
m_type_str{type_str}
{
assert(type == Type::ARR || type == Type::OBJ);
}
bool IsOptional() const;
/**
* Return the type string of the argument.
* Set oneline to allow it to be overridden by a custom oneline type string (m_oneline_description).
*/
std::string ToString(bool oneline) const;
/**
* Return the type string of the argument when it is in an object (dict).
* Set oneline to get the oneline representation (less whitespace)
*/
std::string ToStringObj(bool oneline) const;
/**
* Return the description string, including the argument type and whether
* the argument is required.
*/
std::string ToDescriptionString() const;
};
struct RPCResult {
const std::string m_cond;
const std::string m_result;
explicit RPCResult(std::string result)
: m_cond{}, m_result{std::move(result)}
{
assert(!m_result.empty());
}
RPCResult(std::string cond, std::string result)
: m_cond{std::move(cond)}, m_result{std::move(result)}
{
assert(!m_cond.empty());
assert(!m_result.empty());
}
};
struct RPCResults {
const std::vector<RPCResult> m_results;
RPCResults()
: m_results{}
{
}
RPCResults(RPCResult result)
: m_results{{result}}
{
}
RPCResults(std::initializer_list<RPCResult> results)
: m_results{results}
{
}
/**
* Return the description string.
*/
std::string ToDescriptionString() const;
};
struct RPCExamples {
const std::string m_examples;
RPCExamples(
std::string examples)
: m_examples(std::move(examples))
{
}
std::string ToDescriptionString() const;
};
class RPCHelpMan
{
public:
RPCHelpMan(std::string name, std::string description, std::vector<RPCArg> args, RPCResults results, RPCExamples examples);
std::string ToString() const;
/** If the supplied number of args is neither too small nor too high */
bool IsValidNumArgs(size_t num_args) const;
private:
const std::string m_name;
const std::string m_description;
const std::vector<RPCArg> m_args;
const RPCResults m_results;
const RPCExamples m_examples;
};
#endif // BITCOIN_RPC_UTIL_H
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