feat(engine): invalid block hooks crate (#10629)

Co-authored-by: Dan Cline <6798349+Rjected@users.noreply.github.com>

crates/engine/invalid-block-hooks/Cargo.toml

@@ -0,0 +1,17 @@
+[package]
+name = "reth-invalid-block-hooks"
+version.workspace = true
+edition.workspace = true
+rust-version.workspace = true
+license.workspace = true
+homepage.workspace = true
+repository.workspace = true
+
+[lints]
+workspace = true
+
+[dependencies]
+# reth
+reth-primitives.workspace = true
+reth-provider.workspace = true
+reth-trie.workspace = true

crates/engine/invalid-block-hooks/src/lib.rs

@@ -0,0 +1,5 @@
+//! Invalid block hook implementations.
+
+mod witness;
+
+pub use witness::witness;

crates/engine/invalid-block-hooks/src/witness.rs

@@ -0,0 +1,13 @@
+use reth_primitives::{Receipt, SealedBlockWithSenders, SealedHeader, B256};
+use reth_provider::BlockExecutionOutput;
+use reth_trie::updates::TrieUpdates;
+
+/// Generates a witness for the given block and saves it to a file.
+pub fn witness(
+    _block: &SealedBlockWithSenders,
+    _header: &SealedHeader,
+    _output: &BlockExecutionOutput<Receipt>,
+    _trie_updates: Option<(&TrieUpdates, B256)>,
+) {
+    unimplemented!("witness generation is not supported")
+}