fix return type issue

Cargo.toml

@@ -44,6 +44,8 @@ clap = { version = "4.2.5", features = ["derive"] }
 codec = { package = "parity-scale-codec", version = "3.6.12", default-features = false, features = ["derive", "max-encoded-len"] }
 futures = { version = "0.3.30" }
 hex = { version = "0.4.3", default-features = false, features = ["alloc"] }
+anyhow = { version = "1.0.81", default-features = false }
+wasmtime = { version = "8.0.1", default-features = false }
 hex-literal = { version = "^0.4.1", default-features = false }
 jsonrpsee = { version = "0.24.3", default-features = false, features = ["server"] }
 lazy_static = { version = "1.5.0", default-features = false }
@@ -202,7 +204,7 @@ cere-rpc = { path = "node/rpc" }
 cere-runtime = { path = "runtime/cere" }
 cere-runtime-common = { path = "runtime/common", default-features = false }
 cere-runtime-interfaces = { path = "node/runtime-interfaces" }
-cere-wasm-interface = { path = "node/runtime-interface-macro/cere-wasm-interface" }
+cere-wasm-interface = { path = "node/runtime-interface-macro/cere-wasm-interface"}
 cere-service = { path = "node/service" }
 ddc-primitives = { path = "primitives", default-features = false }
 pallet-chainbridge = { path = "pallets/chainbridge", default-features = false }

node/runtime-interface-macro/cere-wasm-interface/Cargo.toml

@@ -27,3 +27,15 @@ quote = { workspace = true }
 expander = { workspace = true }
 syn = { features = ["extra-traits", "fold", "full", "visit"], workspace = true }
 sp-wasm-interface = { workspace = true }
+anyhow = { optional = true, workspace = true }
+log = { optional = true, workspace = true, default-features = true }
+wasmtime = { optional = true, workspace = true }
+
+[features]
+default = ["std"]
+std = [
+	"anyhow?/std",
+	"codec/std",
+	"log/std",
+]
+wasmtime = ["anyhow", "dep:wasmtime"]

node/runtime-interface-macro/cere-wasm-interface/src/lib.rs

@@ -7,20 +7,20 @@ use core::{iter::Iterator, marker::PhantomData, mem, result};
 use sp_wasm_interface::{Function,  Result as WResult, Pointer};
 
 
-// #[cfg(not(all(feature = "std", feature = "wasmtime")))]
-// #[macro_export]
-// macro_rules! if_wasmtime_is_enabled {
-// 	($($token:tt)*) => {};
-// }
+#[cfg(not(all(feature = "std", feature = "wasmtime")))]
+#[macro_export]
+macro_rules! if_wasmtime_is_enabled {
+	($($token:tt)*) => {};
+}
 
 /// Sandbox memory identifier.
 pub type MemoryId = u32;
 
 /// Result type used by traits in this crate.
 #[cfg(feature = "std")]
 pub type Result<T> = result::Result<T, String>;
-#[cfg(not(feature = "std"))]
-pub type Result<T> = result::Result<T, &'static str>;
+// #[cfg(not(feature = "std"))]
+// pub type Result<T> = result::Result<T, &'static str>;
 
 /// Value types supported by Substrate on the boundary between host/Wasm.
 #[derive(Copy, Clone, PartialEq, Debug, Eq)]