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// Copyright (c) 2022 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_KERNEL_MEMPOOL_OPTIONS_H
#define BITCOIN_KERNEL_MEMPOOL_OPTIONS_H
#include <kernel/mempool_limits.h>
#include <policy/feerate.h>
#include <policy/policy.h>
#include <chrono>
#include <cstdint>
#include <optional>
class CBlockPolicyEstimator;
/** Default for -maxmempool, maximum megabytes of mempool memory usage */
static constexpr unsigned int DEFAULT_MAX_MEMPOOL_SIZE_MB{300};
/** Default for -maxmempool when blocksonly is set */
static constexpr unsigned int DEFAULT_BLOCKSONLY_MAX_MEMPOOL_SIZE_MB{5};
/** Default for -mempoolexpiry, expiration time for mempool transactions in hours */
static constexpr unsigned int DEFAULT_MEMPOOL_EXPIRY_HOURS{336};
/** Default for -mempoolfullrbf, if the transaction replaceability signaling is ignored */
static constexpr bool DEFAULT_MEMPOOL_FULL_RBF{false};
/** Whether to fall back to legacy V1 serialization when writing mempool.dat */
static constexpr bool DEFAULT_PERSIST_V1_DAT{false};
/** Default for -acceptnonstdtxn */
static constexpr bool DEFAULT_ACCEPT_NON_STD_TXN{false};
namespace kernel {
/**
* Options struct containing options for constructing a CTxMemPool. Default
* constructor populates the struct with sane default values which can be
* modified.
*
* Most of the time, this struct should be referenced as CTxMemPool::Options.
*/
struct MemPoolOptions {
/* Used to estimate appropriate transaction fees. */
CBlockPolicyEstimator* estimator{nullptr};
/* The ratio used to determine how often sanity checks will run. */
int check_ratio{0};
int64_t max_size_bytes{DEFAULT_MAX_MEMPOOL_SIZE_MB * 1'000'000};
std::chrono::seconds expiry{std::chrono::hours{DEFAULT_MEMPOOL_EXPIRY_HOURS}};
CFeeRate incremental_relay_feerate{DEFAULT_INCREMENTAL_RELAY_FEE};
/** A fee rate smaller than this is considered zero fee (for relaying, mining and transaction creation) */
CFeeRate min_relay_feerate{DEFAULT_MIN_RELAY_TX_FEE};
CFeeRate dust_relay_feerate{DUST_RELAY_TX_FEE};
/**
* A data carrying output is an unspendable output containing data. The script
* type is designated as TxoutType::NULL_DATA.
*
* Maximum size of TxoutType::NULL_DATA scripts that this node considers standard.
* If nullopt, any size is nonstandard.
*/
std::optional<unsigned> max_datacarrier_bytes{DEFAULT_ACCEPT_DATACARRIER ? std::optional{MAX_OP_RETURN_RELAY} : std::nullopt};
bool permit_bare_multisig{DEFAULT_PERMIT_BAREMULTISIG};
bool require_standard{true};
bool full_rbf{DEFAULT_MEMPOOL_FULL_RBF};
bool persist_v1_dat{DEFAULT_PERSIST_V1_DAT};
MemPoolLimits limits{};
};
} // namespace kernel
#endif // BITCOIN_KERNEL_MEMPOOL_OPTIONS_H
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