// Copyright (c) 2018-2020, The Monero Project
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification, are
// permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this list of
// conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
// of conditions and the following disclaimer in the documentation and/or other
// materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its contributors may be
// used to endorse or promote products derived from this software without specific
// prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include <boost/optional/optional.hpp>
#include <boost/utility/value_init.hpp>
#include "include_base_utils.h"
#include "cryptonote_config.h"
#include "wallet_rpc_helpers.h"
#include "wallet2.h"
#include "cryptonote_basic/cryptonote_format_utils.h"
#include "rpc/core_rpc_server_commands_defs.h"
#include "rpc/rpc_payment_signature.h"
#include "misc_language.h"
#include "cryptonote_basic/cryptonote_basic_impl.h"
#include "int-util.h"
#include "crypto/crypto.h"
#include "cryptonote_basic/blobdatatype.h"
#include "common/i18n.h"
#include "common/util.h"
#undef MONERO_DEFAULT_LOG_CATEGORY
#define MONERO_DEFAULT_LOG_CATEGORY "wallet.wallet2.rpc_payments"
#define RPC_PAYMENT_POLL_PERIOD 10 /* seconds*/
namespace tools
{
//----------------------------------------------------------------------------------------------------
std::string wallet2::get_client_signature() const
{
return cryptonote::make_rpc_payment_signature(m_rpc_client_secret_key);
}
//----------------------------------------------------------------------------------------------------
bool wallet2::get_rpc_payment_info(bool mining, bool &payment_required, uint64_t &credits, uint64_t &diff, uint64_t &credits_per_hash_found, cryptonote::blobdata &hashing_blob, uint64_t &height, uint64_t &seed_height, crypto::hash &seed_hash, crypto::hash &next_seed_hash, uint32_t &cookie)
{
boost::optional<std::string> result = m_node_rpc_proxy.get_rpc_payment_info(mining, payment_required, credits, diff, credits_per_hash_found, hashing_blob, height, seed_height, seed_hash, next_seed_hash, cookie);
credits = m_rpc_payment_state.credits;
if (result && *result != CORE_RPC_STATUS_OK)
return false;
return true;
}
//----------------------------------------------------------------------------------------------------
bool wallet2::daemon_requires_payment()
{
bool payment_required = false;
uint64_t credits, diff, credits_per_hash_found, height, seed_height;
uint32_t cookie;
cryptonote::blobdata blob;
crypto::hash seed_hash, next_seed_hash;
return get_rpc_payment_info(false, payment_required, credits, diff, credits_per_hash_found, blob, height, seed_height, seed_hash, next_seed_hash, cookie) && payment_required;
}
//----------------------------------------------------------------------------------------------------
bool wallet2::make_rpc_payment(uint32_t nonce, uint32_t cookie, uint64_t &credits, uint64_t &balance)
{
cryptonote::COMMAND_RPC_ACCESS_SUBMIT_NONCE::request req = AUTO_VAL_INIT(req);
cryptonote::COMMAND_RPC_ACCESS_SUBMIT_NONCE::response res = AUTO_VAL_INIT(res);
req.nonce = nonce;
req.cookie = cookie;
m_daemon_rpc_mutex.lock();
uint64_t pre_call_credits = m_rpc_payment_state.credits;
req.client = get_client_signature();
epee::json_rpc::error error;
bool r = epee::net_utils::invoke_http_json_rpc("/json_rpc", "rpc_access_submit_nonce", req, res, error, *m_http_client, rpc_timeout);
m_daemon_rpc_mutex.unlock();
THROW_ON_RPC_RESPONSE_ERROR_GENERIC(r, error, res, "rpc_access_submit_nonce");
THROW_WALLET_EXCEPTION_IF(res.credits < pre_call_credits, error::wallet_internal_error, "RPC payment did not increase balance");
if (m_rpc_payment_state.top_hash != res.top_hash)
{
m_rpc_payment_state.top_hash = res.top_hash;
m_rpc_payment_state.stale = true;
}
m_rpc_payment_state.credits = res.credits;
balance = res.credits;
credits = balance - pre_call_credits;
return true;
}
//----------------------------------------------------------------------------------------------------
bool wallet2::search_for_rpc_payment(uint64_t credits_target, const std::function<bool(uint64_t, uint64_t)> &startfunc, const std::function<bool(unsigned)> &contfunc, const std::function<bool(uint64_t)> &foundfunc, const std::function<void(const std::string&)> &errorfunc)
{
bool need_payment = false;
bool payment_required;
uint64_t credits, diff, credits_per_hash_found, height, seed_height;
uint32_t cookie;
unsigned int n_hashes = 0;
cryptonote::blobdata hashing_blob;
crypto::hash seed_hash, next_seed_hash;
try
{
need_payment = get_rpc_payment_info(false, payment_required, credits, diff, credits_per_hash_found, hashing_blob, height, seed_height, seed_hash, next_seed_hash, cookie) && payment_required && credits < credits_target;
if (!need_payment)
return true;
if (!startfunc(diff, credits_per_hash_found))
return true;
}
catch (const std::exception &e) { return false; }
static std::atomic<uint32_t> nonce(0);
while (contfunc(n_hashes))
{
try
{
need_payment = get_rpc_payment_info(true, payment_required, credits, diff, credits_per_hash_found, hashing_blob, height, seed_height, seed_hash, next_seed_hash, cookie) && payment_required && credits < credits_target;
if (!need_payment)
return true;
}
catch (const std::exception &e) { return false; }
if (hashing_blob.empty())
{
MERROR("Bad hashing blob from daemon");
if (errorfunc)
errorfunc("Bad hashing blob from daemon, trying again");
epee::misc_utils::sleep_no_w(1000);
continue;
}
crypto::hash hash;
const uint32_t local_nonce = nonce++; // wrapping's OK
*(uint32_t*)(hashing_blob.data() + 39) = SWAP32LE(local_nonce);
const uint8_t major_version = hashing_blob[0];
if (major_version >= RX_BLOCK_VERSION)
{
const int miners = 1;
crypto::rx_slow_hash(height, seed_height, seed_hash.data, hashing_blob.data(), hashing_blob.size(), hash.data, miners, 0);
}
else
{
int cn_variant = hashing_blob[0] >= 7 ? hashing_blob[0] - 6 : 0;
crypto::cn_slow_hash(hashing_blob.data(), hashing_blob.size(), hash, cn_variant, height);
}
++n_hashes;
if (cryptonote::check_hash(hash, diff))
{
uint64_t credits, balance;
try
{
make_rpc_payment(local_nonce, cookie, credits, balance);
if (credits != credits_per_hash_found)
{
MERROR("Found nonce, but daemon did not credit us with the expected amount");
if (errorfunc)
errorfunc("Found nonce, but daemon did not credit us with the expected amount");
return false;
}
MDEBUG("Found nonce " << local_nonce << " at diff " << diff << ", gets us " << credits_per_hash_found << ", now " << balance << " credits");
if (!foundfunc(credits))
break;
}
catch (const tools::error::wallet_coded_rpc_error &e)
{
MWARNING("Found a local_nonce at diff " << diff << ", but failed to send it to the daemon");
if (errorfunc)
errorfunc("Found nonce, but daemon errored out with error " + std::to_string(e.code()) + ": " + e.status() + ", continuing");
}
catch (const std::exception &e)
{
MWARNING("Found a local_nonce at diff " << diff << ", but failed to send it to the daemon");
if (errorfunc)
errorfunc("Found nonce, but daemon errored out with: '" + std::string(e.what()) + "', continuing");
}
}
}
return true;
}
//----------------------------------------------------------------------------------------------------
void wallet2::check_rpc_cost(const char *call, uint64_t post_call_credits, uint64_t pre_call_credits, double expected_cost)
{
return tools::check_rpc_cost(m_rpc_payment_state, call, post_call_credits, pre_call_credits, expected_cost);
}
//----------------------------------------------------------------------------------------------------
}
