Extract simple-backend into separate crate

Author: tmpolaczyk

Cargo.lock

@@ -23,6 +23,7 @@ dancelight-runtime = { git = "https://github.com/moondance-labs/tanssi", branch
 dancelight-runtime-constants = { git = "https://github.com/moondance-labs/tanssi", branch = "master", default-features = false }
 externalities-without-storage-root = { path = "crates/externalities-without-storage-root" }
 fuzz-dancelight = { path = "fuzzers/fuzz-dancelight" }
+simple-backend-read-only = { path = "crates/simple-backend-read-only" }
 pallet-configuration = { git = "https://github.com/moondance-labs/tanssi", branch = "master", default-features = false }
 starlight-runtime = { git = "https://github.com/moondance-labs/tanssi", branch = "master", default-features = false }
 starlight-runtime-constants = { git = "https://github.com/moondance-labs/tanssi", branch = "master", default-features = false }

Cargo.toml

@@ -0,0 +1,16 @@
+[package]
+name = "simple-backend-read-only"
+authors = { workspace = true }
+edition = "2024"
+license = "GPL-3.0-only"
+version = "0.1.0"
+
+[dependencies]
+hex-literal = { workspace = true }
+sp-core = { workspace = true }
+sp-state-machine = { workspace = true }
+sp-storage = { workspace = true }
+trie-db = { workspace = true }
+
+[lints]
+workspace = true

crates/simple-backend-read-only/Cargo.toml

@@ -7,6 +7,7 @@ use sp_storage::{ChildInfo, StateVersion, Storage};
 use std::ops::Bound::{Excluded, Included, Unbounded};
 use trie_db::{DBValue, MerkleValue};
 
+/// Read-only [sp_state_machine::Backend].
 pub struct SimpleBackend {
     base: &'static Storage,
 }

…rs/fuzz-dancelight/src/simple_backend.rs …ates/simple-backend-read-only/src/lib.rsfuzzers/fuzz-dancelight/src/simple_backend.rs renamed to crates/simple-backend-read-only/src/lib.rs fuzzers/fuzz-dancelight/src/simple_backend.rs renamed to crates/simple-backend-read-only/src/lib.rs

@@ -6,6 +6,7 @@ license = "GPL-3.0-only"
 version = "0.1.0"
 
 [dependencies]
+simple-backend-read-only = { workspace = true }
 alloy-core = { workspace = true }
 bitvec = { workspace = true }
 cumulus-primitives-core = { workspace = true }

fuzzers/fuzz-dancelight/Cargo.toml

@@ -12,7 +12,7 @@ use crate::genesis::invulnerables_from_seeds;
 use crate::metadata::{
     ACCOUNT_ID_TYPE_ID, METADATA, RUNTIME_CALL_TYPE_ID, call_name_from_idx, event_name_from_idx,
 };
-use crate::simple_backend::SimpleBackend;
+use simple_backend_read_only::SimpleBackend;
 use crate::storage_tracer::{BlockContext, ExtStorageTracer, TracingExt};
 use dancelight_runtime::bridge_to_ethereum_config::EthereumGatewayAddress;
 use dancelight_runtime::{
@@ -86,8 +86,6 @@ mod genesis;
 mod metadata;
 mod mutators;
 mod read_snapshot;
-// TODO: extract to separate crate to speed up compilation
-mod simple_backend;
 mod storage_tracer;
 
 use crate::event_tracer::EventTracer;