fix abi test

Author: jstarry

frozen-abi/src/abi_example.rs

@@ -613,6 +613,14 @@ impl<O: AbiEnumVisitor, E: AbiEnumVisitor> AbiEnumVisitor for Result<O, E> {
     }
 }
 
+impl AbiEnumVisitor for str {
+    fn visit_for_abi(&self, digester: &mut AbiDigester) -> DigestResult {
+        info!("AbiEnumVisitor for str");
+        "".serialize(digester.create_new())
+            .map_err(DigestError::wrap_by_type::<str>)
+    }
+}
+
 #[cfg(not(target_os = "solana"))]
 impl<T: AbiExample> AbiExample for std::sync::OnceLock<T> {
     fn example() -> Self {

message/src/versions/mod.rs

@@ -38,7 +38,7 @@ pub const MESSAGE_VERSION_PREFIX: u8 = 0x80;
 /// format.
 #[cfg_attr(
     feature = "frozen-abi",
-    frozen_abi(digest = "Hndd1SDxQ5qNZvzHo77dpW6uD5c1DJNVjtg8tE6hc432"),
+    frozen_abi(digest = "AbhbWKcm8BEickDjeXN7mL4BTvrqvhVKv7ZXNykq22ck"),
     derive(AbiEnumVisitor, AbiExample)
 )]
 #[derive(Debug, PartialEq, Eq, Clone)]