cold: type-erased backend via DynColdStorageBackend

Cargo.toml

@@ -3,7 +3,7 @@ members = ["crates/*"]
 resolver = "2"
 
 [workspace.package]
-version = "0.8.0"
+version = "0.8.1"
 edition = "2024"
 rust-version = "1.92"
 authors = ["init4"]
@@ -35,13 +35,13 @@ incremental = false
 
 [workspace.dependencies]
 # internal
-signet-hot = { version = "0.8.0", path = "./crates/hot" }
-signet-hot-mdbx = { version = "0.8.0", path = "./crates/hot-mdbx" }
-signet-cold = { version = "0.8.0", path = "./crates/cold" }
-signet-cold-mdbx = { version = "0.8.0", path = "./crates/cold-mdbx" }
-signet-cold-sql = { version = "0.8.0", path = "./crates/cold-sql" }
-signet-storage = { version = "0.8.0", path = "./crates/storage" }
-signet-storage-types = { version = "0.8.0", path = "./crates/types" }
+signet-hot = { version = "0.8.1", path = "./crates/hot" }
+signet-hot-mdbx = { version = "0.8.1", path = "./crates/hot-mdbx" }
+signet-cold = { version = "0.8.1", path = "./crates/cold" }
+signet-cold-mdbx = { version = "0.8.1", path = "./crates/cold-mdbx" }
+signet-cold-sql = { version = "0.8.1", path = "./crates/cold-sql" }
+signet-storage = { version = "0.8.1", path = "./crates/storage" }
+signet-storage-types = { version = "0.8.1", path = "./crates/types" }
 
 # External, in-house
 signet-libmdbx = { version = "0.8.0" }

crates/cold/src/conformance.rs

@@ -5,8 +5,8 @@
 //! a custom backend, call the test functions with your backend instance.
 
 use crate::{
-    BlockData, ColdResult, ColdStorage, ColdStorageBackend, ColdStorageError, Filter,
-    HeaderSpecifier, ReceiptSpecifier, RpcLog, TransactionSpecifier,
+    BlockData, ColdResult, ColdStorage, ColdStorageBackend, ColdStorageError, ErasedBackend,
+    Filter, HeaderSpecifier, ReceiptSpecifier, RpcLog, TransactionSpecifier,
 };
 use alloy::{
     consensus::{
@@ -43,6 +43,32 @@ pub async fn conformance<B: ColdStorageBackend>(backend: B) -> ColdResult<()> {
     Ok(())
 }
 
+/// Run the conformance suite against `backend` after erasing it
+/// through [`crate::DynColdStorageBackend`].
+///
+/// Exercises the same contract as [`conformance`] but routes every
+/// call through [`ErasedBackend`], validating that the erased
+/// dispatch path upholds the trait contract.
+pub async fn conformance_erased<B: ColdStorageBackend>(backend: B) -> ColdResult<()> {
+    let erased = ErasedBackend::new(backend);
+    let cancel = CancellationToken::new();
+    let handle = ColdStorage::new(erased, cancel.clone());
+    test_empty_storage(&handle).await?;
+    test_append_and_read_header(&handle).await?;
+    test_header_hash_lookup(&handle).await?;
+    test_transaction_lookups(&handle).await?;
+    test_receipt_lookups(&handle).await?;
+    test_truncation(&handle).await?;
+    test_batch_append(&handle).await?;
+    test_confirmation_metadata(&handle).await?;
+    test_cold_receipt_metadata(&handle).await?;
+    test_get_logs(&handle).await?;
+    test_stream_logs(&handle).await?;
+    test_drain_above(&handle).await?;
+    cancel.cancel();
+    Ok(())
+}
+
 /// Create test block data for conformance tests.
 ///
 /// Creates a minimal valid block with the given block number.