Add the only_cairo_vm feature (#33)

* Update blockifier version

* Update blockifier version

* Add only_casm feature in state reader

* Add only_cairo_vm feature in replay

* Add doc

---------

Co-authored-by: Pedro Fontana <peter@Pedros-MacBook-Pro.local>

Cargo.toml

@@ -9,5 +9,5 @@ resolver = "2"
 [workspace.dependencies]
 thiserror = "1.0.32"
 starknet_api = "=0.12.0-dev.1"
-blockifier = { git = "https://github.com/lambdaclass/blockifier", rev = "d458a8d64b6d31da49c447576894ce013af862c2" }
+blockifier = { git = "https://github.com/lambdaclass/blockifier", rev = "8eab209eabee1359bec1cc0e9d0a34542a8b65a5" }
 tracing = "0.1"

replay/Cargo.toml

@@ -5,6 +5,8 @@ edition = "2021"
 
 [features]
 benchmark = []
+# The only_cairo_vm feature is designed to avoid executing transitions with cairo_native and instead use cairo_vm exclusively
+only_cairo_vm = ["rpc-state-reader/only_casm"]
 
 [dependencies]
 # starknet specific crates

rpc-state-reader/Cargo.toml

@@ -3,6 +3,11 @@ name = "rpc-state-reader"
 version = "0.1.0"
 edition = "2021"
 
+[features]
+# The only_casm feature compiles all the Sierra fetched contracts to CASM.
+# We use this feature to avoid using cairo_native in the Replay crate.
+only_casm = []
+
 [dependencies]
 ureq = { version = "2.7.1", features = ["json"] }
 serde = { version = "1.0", features = ["derive"] }

rpc-state-reader/src/blockifier_state_reader.rs

@@ -89,7 +89,14 @@ impl StateReader for RpcStateReader {
                     sierra_program_debug_info: None,
                     abi: None,
                 };
-                ContractClass::V1Sierra(sierra_cc.try_into().unwrap())
+
+                if cfg!(feature = "only_casm") {
+                    let casm_cc =
+                    cairo_lang_starknet_classes::casm_contract_class::CasmContractClass::from_contract_class(sierra_cc, false, usize::MAX).unwrap();
+                    ContractClass::V1(casm_cc.try_into().unwrap())
+                } else {
+                    ContractClass::V1Sierra(sierra_cc.try_into().unwrap())
+                }
             }
             None => {
                 return Err(StateError::UndeclaredClassHash(