chore(reth-db): no_std support (#9597)

Cargo.toml

@@ -451,7 +451,7 @@ humantime-serde = "1.1"
 rand = "0.8.5"
 rustc-hash = {  version = "2.0", default-features = false }
 schnellru = "0.2"
-strum = "0.26"
+strum = {  version = "0.26", default-features = false }
 rayon = "1.7"
 itertools = "0.13"
 parking_lot = "0.12"

crates/storage/db/Cargo.toml

@@ -35,21 +35,21 @@ eyre = { workspace = true, optional = true }
 serde = { workspace = true, default-features = false }
 
 # metrics
-reth-metrics.workspace = true
-metrics.workspace = true
+reth-metrics = { workspace = true, optional = true }
+metrics = { workspace = true, optional = true }
 
 # misc
 bytes.workspace = true
-page_size = "0.6.0"
+page_size = {  version = "0.6.0", optional = true }
 thiserror.workspace = true
 tempfile = { workspace = true, optional = true }
 derive_more.workspace = true
 paste.workspace = true
-rustc-hash.workspace = true
+rustc-hash = { workspace = true, optional = true }
 sysinfo = { version = "0.30", default-features = false }
 
 # arbitrary utils
-strum = { workspace = true, features = ["derive"] }
+strum = { workspace = true, features = ["derive"], optional = true }
 
 [dev-dependencies]
 # reth libs with arbitrary
@@ -77,7 +77,15 @@ assert_matches.workspace = true
 
 [features]
 default = ["mdbx"]
-mdbx = ["dep:reth-libmdbx", "dep:eyre"]
+mdbx = [
+    "dep:reth-libmdbx",
+    "dep:eyre",
+    "dep:page_size",
+    "reth-metrics",
+    "dep:metrics",
+    "dep:strum",
+    "dep:rustc-hash",
+]
 test-utils = ["dep:tempfile", "arbitrary"]
 bench = []
 arbitrary = ["reth-primitives/arbitrary", "reth-db-api/arbitrary"]

crates/storage/db/src/lib.rs

@@ -17,9 +17,11 @@
 
 mod implementation;
 pub mod lockfile;
+#[cfg(feature = "mdbx")]
 mod metrics;
 pub mod static_file;
 pub mod tables;
+#[cfg(feature = "mdbx")]
 mod utils;
 pub mod version;
 
@@ -28,6 +30,7 @@ pub mod mdbx;
 
 pub use reth_storage_errors::db::{DatabaseError, DatabaseWriteOperation};
 pub use tables::*;
+#[cfg(feature = "mdbx")]
 pub use utils::is_database_empty;
 
 #[cfg(feature = "mdbx")]

crates/storage/db/src/tables/mod.rs

@@ -16,6 +16,7 @@ pub mod codecs;
 mod raw;
 pub use raw::{RawDupSort, RawKey, RawTable, RawValue, TableRawRow};
 
+#[cfg(feature = "mdbx")]
 pub(crate) mod utils;
 
 use reth_db_api::{