65 lines
2.4 KiB
Rust
65 lines
2.4 KiB
Rust
//! User-configurable mempool parameters.
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use std::time::Duration;
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use serde::{Deserialize, Serialize};
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/// Mempool configuration section.
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#[derive(Clone, Debug, Eq, PartialEq, Deserialize, Serialize)]
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#[serde(deny_unknown_fields, default)]
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pub struct Config {
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/// The mempool transaction cost limit.
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///
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/// This limits the total serialized byte size of all transactions in the mempool.
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///
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/// Consensus rule:
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/// > There MUST be a configuration option mempooltxcostlimit, which SHOULD default to 80000000.
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///
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/// This corresponds to `mempooltxcostlimit` from [ZIP-401](https://zips.z.cash/zip-0401#specification).
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pub tx_cost_limit: u64,
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/// The mempool transaction eviction age limit.
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///
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/// This limits the maximum amount of time evicted transaction IDs stay in
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/// the mempool rejection list. Transactions are randomly evicted from the
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/// mempool when the mempool reaches [`Self::tx_cost_limit`].
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///
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/// (Transactions can also be rejected by the mempool for other reasons.
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/// Different rejection reasons can have different age limits.)
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///
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/// This corresponds to `mempoolevictionmemoryminutes` from
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/// [ZIP-401](https://zips.z.cash/zip-0401#specification).
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#[serde(with = "humantime_serde")]
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pub eviction_memory_time: Duration,
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/// If the state's best chain tip has reached this height, always enable the mempool,
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/// regardless of Zebra's sync status.
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///
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/// Set to `None` by default: Zebra always checks the sync status before enabling the mempool.
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//
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// TODO:
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// - allow the mempool to be enabled before the genesis block is committed?
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// we could replace `Option` with an enum that has an `AlwaysEnable` variant
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pub debug_enable_at_height: Option<u32>,
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}
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impl Default for Config {
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fn default() -> Self {
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Self {
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// [ZIP-401] Consensus rules:
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//
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// > There MUST be a configuration option mempooltxcostlimit,
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// > which SHOULD default to 80000000.
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// >
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// > There MUST be a configuration option mempoolevictionmemoryminutes,
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// > which SHOULD default to 60 [minutes].
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//
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// [ZIP-401]: https://zips.z.cash/zip-0401#specification
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tx_cost_limit: 80_000_000,
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eviction_memory_time: Duration::from_secs(60 * 60),
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debug_enable_at_height: None,
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}
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}
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}
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