1 files changed, 60 insertions, 0 deletions
diff --git a/src/kernel/mempool_options.h b/src/kernel/mempool_options.h
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+++ b/src/kernel/mempool_options.h
@@ -0,0 +1,60 @@
+// 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 <script/standard.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 -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};
+
+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};
+    MemPoolLimits limits{};
+};
+} // namespace kernel
+
+#endif // BITCOIN_KERNEL_MEMPOOL_OPTIONS_H