chore: move primitives/exex to reth-exex-types (#8677)

crates/exex/exex/Cargo.toml

@@ -14,6 +14,7 @@ workspace = true
 [dependencies]
 ## reth
 reth-config.workspace = true
+reth-exex-types.workspace = true
 reth-metrics.workspace = true
 reth-node-api.workspace = true
 reth-node-core.workspace = true

crates/exex/exex/src/lib.rs

@@ -45,3 +45,7 @@ pub use manager::*;
 
 mod notification;
 pub use notification::*;
+
+// Re-export exex types
+#[doc(inline)]
+pub use reth_exex_types::*;

crates/exex/exex/src/manager.rs

@@ -1,7 +1,7 @@
-use crate::{ExExEvent, ExExNotification};
+use crate::{ExExEvent, ExExNotification, FinishedExExHeight};
 use metrics::Gauge;
 use reth_metrics::{metrics::Counter, Metrics};
-use reth_primitives::{BlockNumber, FinishedExExHeight};
+use reth_primitives::BlockNumber;
 use reth_tracing::tracing::debug;
 use std::{
     collections::VecDeque,

crates/exex/types/Cargo.toml

@@ -0,0 +1,15 @@
+[package]
+name = "reth-exex-types"
+version.workspace = true
+edition.workspace = true
+homepage.workspace = true
+license.workspace = true
+repository.workspace = true
+rust-version.workspace = true
+description = "Commonly used types for exex usage in reth."
+
+[lints]
+workspace = true
+
+[dependencies]
+alloy-primitives.workspace = true

crates/exex/types/src/lib.rs

@@ -0,0 +1,35 @@
+//! Commonly used types for exex usage.
+
+#![doc(
+    html_logo_url = "https://raw.githubusercontent.com/paradigmxyz/reth/main/assets/reth-docs.png",
+    html_favicon_url = "https://avatars0.githubusercontent.com/u/97369466?s=256",
+    issue_tracker_base_url = "https://github.com/paradigmxyz/reth/issues/"
+)]
+#![cfg_attr(not(test), warn(unused_crate_dependencies))]
+#![cfg_attr(docsrs, feature(doc_cfg, doc_auto_cfg))]
+
+use alloy_primitives::BlockNumber;
+
+/// The finished height of all `ExEx`'s.
+#[derive(Debug, Clone, Copy)]
+pub enum FinishedExExHeight {
+    /// No `ExEx`'s are installed, so there is no finished height.
+    NoExExs,
+    /// Not all `ExExs` have emitted a `FinishedHeight` event yet.
+    NotReady,
+    /// The finished height of all `ExEx`'s.
+    ///
+    /// This is the lowest common denominator between all `ExEx`'s.
+    ///
+    /// This block is used to (amongst other things) determine what blocks are safe to prune.
+    ///
+    /// The number is inclusive, i.e. all blocks `<= finished_height` are safe to prune.
+    Height(BlockNumber),
+}
+
+impl FinishedExExHeight {
+    /// Returns `true` if not all `ExExs` have emitted a `FinishedHeight` event yet.
+    pub const fn is_not_ready(&self) -> bool {
+        matches!(self, Self::NotReady)
+    }
+}