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Daemons intended for public use can be set up to require payment in the form of hashes in exchange for RPC service. This enables public daemons to receive payment for their work over a large number of calls. This system behaves similarly to a pool, so payment takes the form of valid blocks every so often, yielding a large one off payment, rather than constant micropayments. This system can also be used by third parties as a "paywall" layer, where users of a service can pay for use by mining Monero to the service provider's address. An example of this for web site access is Primo, a Monero mining based website "paywall": https://github.com/selene-kovri/primo This has some advantages: - incentive to run a node providing RPC services, thereby promoting the availability of third party nodes for those who can't run their own - incentive to run your own node instead of using a third party's, thereby promoting decentralization - decentralized: payment is done between a client and server, with no third party needed - private: since the system is "pay as you go", you don't need to identify yourself to claim a long lived balance - no payment occurs on the blockchain, so there is no extra transactional load - one may mine with a beefy server, and use those credits from a phone, by reusing the client ID (at the cost of some privacy) - no barrier to entry: anyone may run a RPC node, and your expected revenue depends on how much work you do - Sybil resistant: if you run 1000 idle RPC nodes, you don't magically get more revenue - no large credit balance maintained on servers, so they have no incentive to exit scam - you can use any/many node(s), since there's little cost in switching servers - market based prices: competition between servers to lower costs - incentive for a distributed third party node system: if some public nodes are overused/slow, traffic can move to others - increases network security - helps counteract mining pools' share of the network hash rate - zero incentive for a payer to "double spend" since a reorg does not give any money back to the miner And some disadvantages: - low power clients will have difficulty mining (but one can optionally mine in advance and/or with a faster machine) - payment is "random", so a server might go a long time without a block before getting one - a public node's overall expected payment may be small Public nodes are expected to compete to find a suitable level for cost of service. The daemon can be set up this way to require payment for RPC services: monerod --rpc-payment-address 4xxxxxx \ --rpc-payment-credits 250 --rpc-payment-difficulty 1000 These values are an example only. The --rpc-payment-difficulty switch selects how hard each "share" should be, similar to a mining pool. The higher the difficulty, the fewer shares a client will find. The --rpc-payment-credits switch selects how many credits are awarded for each share a client finds. Considering both options, clients will be awarded credits/difficulty credits for every hash they calculate. For example, in the command line above, 0.25 credits per hash. A client mining at 100 H/s will therefore get an average of 25 credits per second. For reference, in the current implementation, a credit is enough to sync 20 blocks, so a 100 H/s client that's just starting to use Monero and uses this daemon will be able to sync 500 blocks per second. The wallet can be set to automatically mine if connected to a daemon which requires payment for RPC usage. It will try to keep a balance of 50000 credits, stopping mining when it's at this level, and starting again as credits are spent. With the example above, a new client will mine this much credits in about half an hour, and this target is enough to sync 500000 blocks (currently about a third of the monero blockchain). There are three new settings in the wallet: - credits-target: this is the amount of credits a wallet will try to reach before stopping mining. The default of 0 means 50000 credits. - auto-mine-for-rpc-payment-threshold: this controls the minimum credit rate which the wallet considers worth mining for. If the daemon credits less than this ratio, the wallet will consider mining to be not worth it. In the example above, the rate is 0.25 - persistent-rpc-client-id: if set, this allows the wallet to reuse a client id across runs. This means a public node can tell a wallet that's connecting is the same as one that connected previously, but allows a wallet to keep their credit balance from one run to the other. Since the wallet only mines to keep a small credit balance, this is not normally worth doing. However, someone may want to mine on a fast server, and use that credit balance on a low power device such as a phone. If left unset, a new client ID is generated at each wallet start, for privacy reasons. To mine and use a credit balance on two different devices, you can use the --rpc-client-secret-key switch. A wallet's client secret key can be found using the new rpc_payments command in the wallet. Note: anyone knowing your RPC client secret key is able to use your credit balance. The wallet has a few new commands too: - start_mining_for_rpc: start mining to acquire more credits, regardless of the auto mining settings - stop_mining_for_rpc: stop mining to acquire more credits - rpc_payments: display information about current credits with the currently selected daemon The node has an extra command: - rpc_payments: display information about clients and their balances The node will forget about any balance for clients which have been inactive for 6 months. Balances carry over on node restart.
352 lines
11 KiB
C++
352 lines
11 KiB
C++
// Copyright (c) 2014-2019, The Monero Project
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//
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without modification, are
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// permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice, this list of
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// conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright notice, this list
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// of conditions and the following disclaimer in the documentation and/or other
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// materials provided with the distribution.
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//
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// 3. Neither the name of the copyright holder nor the names of its contributors may be
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// used to endorse or promote products derived from this software without specific
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// prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers
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#pragma once
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#include <list>
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#include "serialization/keyvalue_serialization.h"
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#include "cryptonote_basic/cryptonote_basic.h"
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#include "cryptonote_basic/blobdatatype.h"
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namespace cryptonote
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{
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#define BC_COMMANDS_POOL_BASE 2000
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/************************************************************************/
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/* P2P connection info, serializable to json */
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/************************************************************************/
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struct connection_info
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{
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bool incoming;
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bool localhost;
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bool local_ip;
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bool ssl;
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std::string address;
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std::string host;
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std::string ip;
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std::string port;
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uint16_t rpc_port;
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uint32_t rpc_credits_per_hash;
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std::string peer_id;
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uint64_t recv_count;
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uint64_t recv_idle_time;
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uint64_t send_count;
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uint64_t send_idle_time;
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std::string state;
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uint64_t live_time;
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uint64_t avg_download;
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uint64_t current_download;
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uint64_t avg_upload;
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uint64_t current_upload;
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uint32_t support_flags;
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std::string connection_id;
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uint64_t height;
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uint32_t pruning_seed;
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uint8_t address_type;
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BEGIN_KV_SERIALIZE_MAP()
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KV_SERIALIZE(incoming)
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KV_SERIALIZE(localhost)
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KV_SERIALIZE(local_ip)
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KV_SERIALIZE(address)
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KV_SERIALIZE(host)
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KV_SERIALIZE(ip)
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KV_SERIALIZE(port)
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KV_SERIALIZE(rpc_port)
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KV_SERIALIZE(rpc_credits_per_hash)
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KV_SERIALIZE(peer_id)
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KV_SERIALIZE(recv_count)
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KV_SERIALIZE(recv_idle_time)
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KV_SERIALIZE(send_count)
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KV_SERIALIZE(send_idle_time)
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KV_SERIALIZE(state)
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KV_SERIALIZE(live_time)
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KV_SERIALIZE(avg_download)
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KV_SERIALIZE(current_download)
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KV_SERIALIZE(avg_upload)
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KV_SERIALIZE(current_upload)
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KV_SERIALIZE(support_flags)
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KV_SERIALIZE(connection_id)
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KV_SERIALIZE(height)
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KV_SERIALIZE(pruning_seed)
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KV_SERIALIZE(address_type)
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END_KV_SERIALIZE_MAP()
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};
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/************************************************************************/
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/* */
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/************************************************************************/
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struct tx_blob_entry
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{
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blobdata blob;
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crypto::hash prunable_hash;
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BEGIN_KV_SERIALIZE_MAP()
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KV_SERIALIZE(blob)
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KV_SERIALIZE_VAL_POD_AS_BLOB(prunable_hash)
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END_KV_SERIALIZE_MAP()
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tx_blob_entry(const blobdata &bd = {}, const crypto::hash &h = crypto::null_hash): blob(bd), prunable_hash(h) {}
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};
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struct block_complete_entry
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{
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bool pruned;
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blobdata block;
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uint64_t block_weight;
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std::vector<tx_blob_entry> txs;
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BEGIN_KV_SERIALIZE_MAP()
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KV_SERIALIZE_OPT(pruned, false)
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KV_SERIALIZE(block)
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KV_SERIALIZE_OPT(block_weight, (uint64_t)0)
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if (this_ref.pruned)
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{
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KV_SERIALIZE(txs)
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}
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else
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{
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std::vector<blobdata> txs;
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if (is_store)
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{
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txs.reserve(this_ref.txs.size());
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for (const auto &e: this_ref.txs) txs.push_back(e.blob);
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}
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epee::serialization::selector<is_store>::serialize(txs, stg, hparent_section, "txs");
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if (!is_store)
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{
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block_complete_entry &self = const_cast<block_complete_entry&>(this_ref);
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self.txs.clear();
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self.txs.reserve(txs.size());
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for (auto &e: txs) self.txs.push_back({std::move(e), crypto::null_hash});
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}
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}
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END_KV_SERIALIZE_MAP()
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block_complete_entry(): pruned(false), block_weight(0) {}
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};
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/************************************************************************/
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/* */
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/************************************************************************/
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struct NOTIFY_NEW_BLOCK
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{
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const static int ID = BC_COMMANDS_POOL_BASE + 1;
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struct request_t
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{
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block_complete_entry b;
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uint64_t current_blockchain_height;
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BEGIN_KV_SERIALIZE_MAP()
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KV_SERIALIZE(b)
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KV_SERIALIZE(current_blockchain_height)
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END_KV_SERIALIZE_MAP()
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};
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typedef epee::misc_utils::struct_init<request_t> request;
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};
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/************************************************************************/
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/* */
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/************************************************************************/
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struct NOTIFY_NEW_TRANSACTIONS
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{
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const static int ID = BC_COMMANDS_POOL_BASE + 2;
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struct request_t
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{
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std::vector<blobdata> txs;
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std::string _; // padding
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BEGIN_KV_SERIALIZE_MAP()
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KV_SERIALIZE(txs)
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KV_SERIALIZE(_)
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END_KV_SERIALIZE_MAP()
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};
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typedef epee::misc_utils::struct_init<request_t> request;
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};
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/************************************************************************/
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/* */
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/************************************************************************/
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struct NOTIFY_REQUEST_GET_OBJECTS
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{
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const static int ID = BC_COMMANDS_POOL_BASE + 3;
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struct request_t
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{
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std::vector<crypto::hash> blocks;
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bool prune;
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BEGIN_KV_SERIALIZE_MAP()
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KV_SERIALIZE_CONTAINER_POD_AS_BLOB(blocks)
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KV_SERIALIZE_OPT(prune, false)
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END_KV_SERIALIZE_MAP()
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};
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typedef epee::misc_utils::struct_init<request_t> request;
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};
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struct NOTIFY_RESPONSE_GET_OBJECTS
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{
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const static int ID = BC_COMMANDS_POOL_BASE + 4;
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struct request_t
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{
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std::vector<block_complete_entry> blocks;
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std::vector<crypto::hash> missed_ids;
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uint64_t current_blockchain_height;
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BEGIN_KV_SERIALIZE_MAP()
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KV_SERIALIZE(blocks)
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KV_SERIALIZE_CONTAINER_POD_AS_BLOB(missed_ids)
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KV_SERIALIZE(current_blockchain_height)
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END_KV_SERIALIZE_MAP()
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};
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typedef epee::misc_utils::struct_init<request_t> request;
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};
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struct CORE_SYNC_DATA
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{
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uint64_t current_height;
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uint64_t cumulative_difficulty;
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uint64_t cumulative_difficulty_top64;
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crypto::hash top_id;
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uint8_t top_version;
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uint32_t pruning_seed;
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BEGIN_KV_SERIALIZE_MAP()
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KV_SERIALIZE(current_height)
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KV_SERIALIZE(cumulative_difficulty)
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KV_SERIALIZE(cumulative_difficulty_top64)
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KV_SERIALIZE_VAL_POD_AS_BLOB(top_id)
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KV_SERIALIZE_OPT(top_version, (uint8_t)0)
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KV_SERIALIZE_OPT(pruning_seed, (uint32_t)0)
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END_KV_SERIALIZE_MAP()
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};
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struct NOTIFY_REQUEST_CHAIN
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{
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const static int ID = BC_COMMANDS_POOL_BASE + 6;
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struct request_t
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{
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std::list<crypto::hash> block_ids; /*IDs of the first 10 blocks are sequential, next goes with pow(2,n) offset, like 2, 4, 8, 16, 32, 64 and so on, and the last one is always genesis block */
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bool prune;
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BEGIN_KV_SERIALIZE_MAP()
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KV_SERIALIZE_CONTAINER_POD_AS_BLOB(block_ids)
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KV_SERIALIZE_OPT(prune, false)
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END_KV_SERIALIZE_MAP()
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};
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typedef epee::misc_utils::struct_init<request_t> request;
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};
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struct NOTIFY_RESPONSE_CHAIN_ENTRY
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{
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const static int ID = BC_COMMANDS_POOL_BASE + 7;
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struct request_t
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{
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uint64_t start_height;
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uint64_t total_height;
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uint64_t cumulative_difficulty;
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uint64_t cumulative_difficulty_top64;
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std::vector<crypto::hash> m_block_ids;
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std::vector<uint64_t> m_block_weights;
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BEGIN_KV_SERIALIZE_MAP()
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KV_SERIALIZE(start_height)
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KV_SERIALIZE(total_height)
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KV_SERIALIZE(cumulative_difficulty)
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KV_SERIALIZE(cumulative_difficulty_top64)
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KV_SERIALIZE_CONTAINER_POD_AS_BLOB(m_block_ids)
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KV_SERIALIZE_CONTAINER_POD_AS_BLOB(m_block_weights)
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END_KV_SERIALIZE_MAP()
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};
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typedef epee::misc_utils::struct_init<request_t> request;
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};
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/************************************************************************/
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/* */
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/************************************************************************/
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struct NOTIFY_NEW_FLUFFY_BLOCK
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{
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const static int ID = BC_COMMANDS_POOL_BASE + 8;
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struct request_t
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{
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block_complete_entry b;
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uint64_t current_blockchain_height;
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BEGIN_KV_SERIALIZE_MAP()
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KV_SERIALIZE(b)
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KV_SERIALIZE(current_blockchain_height)
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END_KV_SERIALIZE_MAP()
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};
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typedef epee::misc_utils::struct_init<request_t> request;
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};
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/************************************************************************/
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/* */
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/************************************************************************/
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struct NOTIFY_REQUEST_FLUFFY_MISSING_TX
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{
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const static int ID = BC_COMMANDS_POOL_BASE + 9;
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struct request_t
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{
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crypto::hash block_hash;
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uint64_t current_blockchain_height;
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std::vector<uint64_t> missing_tx_indices;
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BEGIN_KV_SERIALIZE_MAP()
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KV_SERIALIZE_VAL_POD_AS_BLOB(block_hash)
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KV_SERIALIZE(current_blockchain_height)
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KV_SERIALIZE_CONTAINER_POD_AS_BLOB(missing_tx_indices)
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END_KV_SERIALIZE_MAP()
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};
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typedef epee::misc_utils::struct_init<request_t> request;
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};
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}
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