2 files changed, 24 insertions, 0 deletions
diff --git a/lib/warden-core/Cargo.toml b/lib/warden-core/Cargo.toml
index dbe61fd..9cd4617 100644
--- a/lib/warden-core/Cargo.toml
+++ b/lib/warden-core/Cargo.toml
@@ -13,12 +13,17 @@ rustdoc-args = ["--cfg", "docsrs"]
 
 [dependencies]
 prost = { workspace = true, optional = true }
+serde = { workspace = true, optional = true }
+serde_json = { workspace = true, optional = true }
 tonic = { workspace = true, optional = true }
 tonic-types = { version = "0.14.0", optional = true }
+utoipa = { workspace = true, optional = true }
 
 [features]
 default = []
 iso20022 = ["dep:prost", "dep:tonic", "dep:tonic-types"]
+serde = ["dep:serde", "serde/derive", "dep:serde_json"]
+openapi = ["dep:utoipa", "serde"]
 
 [build-dependencies]
 tonic-prost-build = { version = "0.14.0", features = ["cleanup-markdown"] }
diff --git a/lib/warden-core/build.rs b/lib/warden-core/build.rs
index be4f8f2..7ae6b6a 100644
--- a/lib/warden-core/build.rs
+++ b/lib/warden-core/build.rs
@@ -50,6 +50,12 @@ fn build_proto(package: &str, entity: Entity) -> Result<(), Box<dyn std::error::
                 format!("#[cfg(feature = \"rpc-client-{package}\")] #[cfg_attr(docsrs, doc(cfg(feature = \"rpc-client-{package}\")))]"),
             );
 
+    #[cfg(feature = "serde")]
+    let config = add_serde(config);
+
+    #[cfg(feature = "openapi")]
+    let config = add_openapi(config);
+
     config
         .file_descriptor_set_path(out_dir.join(format!("{package}_descriptor.bin")))
             .server_mod_attribute(
@@ -69,3 +75,16 @@ fn build_proto(package: &str, entity: Entity) -> Result<(), Box<dyn std::error::
 
     Ok(())
 }
+
+#[cfg(all(feature = "serde", feature = "iso20022"))]
+fn add_serde(config: tonic_prost_build::Builder) -> tonic_prost_build::Builder {
+    config.type_attribute(
+        ".",
+        "#[derive(serde::Serialize, serde::Deserialize)] #[serde(rename_all = \"snake_case\")]",
+    )
+}
+
+#[cfg(all(feature = "openapi", feature = "iso20022"))]
+fn add_openapi(config: tonic_prost_build::Builder) -> tonic_prost_build::Builder {
+    config.type_attribute(".", "#[derive(utoipa::ToSchema)]")
+}