Merge pull request #139 from OffchainLabs/sol-interface-struct

Allow struct references within sol_interface macro

stylus-proc/src/lib.rs

@@ -146,6 +146,10 @@ pub fn sol_storage(input: TokenStream) -> TokenStream {
 /// Observe the casing change. [`sol_interface!`] computes the selector based on the exact name passed in,
 /// which should almost always be `CamelCase`. For aesthetics, the rust functions will instead use `snake_case`.
 ///
+/// Note that structs may be used, as return types for example. Trying to reference structs using
+/// the Solidity path separator (`module.MyStruct`) is not currently supported and will fail at
+/// build-time.
+///
 /// # Reentrant calls
 ///
 /// Contracts that opt into reentrancy via the `reentrant` feature flag require extra care.

stylus-proc/src/types.rs

@@ -122,6 +122,10 @@ pub fn solidity_type_info(ty: &Type) -> (Cow<'static, str>, Cow<'static, str>) {
                 (path.into(), abi.into())
             }
         }
+        Type::Custom(path) => {
+            let path: Cow<'static, str> = path.to_string().into();
+            (path.clone(), path)
+        }
         _ => todo!("Solidity type {ty} is not yet implemented in sol_interface!"),
     }
 }