cosmos-sdk-proto: add serde derive macros (#471)

Uses Informal's fork of `pbjson` to generate `serde` impls

Co-authored-by: Tony Arcieri (iqlusion) <[email protected]>

cosmos-sdk-proto/Cargo.toml

@@ -21,13 +21,16 @@ tendermint-proto = "0.39.1"
 
 # Optional dependencies
 tonic = { version = "0.12", optional = true, default-features = false, features = ["codegen", "prost"] }
+serde = { version = "1.0.203", optional = true, default-features = false, features = ["alloc"] }
+pbjson = { package = "informalsystems-pbjson", optional = true, version = "0.7" }
 
 [features]
 default = ["grpc-transport"]
 std = ["prost/std", "tendermint-proto/std"]
 grpc = ["std", "tonic"]
 grpc-transport = ["grpc", "tonic/transport"]
 cosmwasm = []
+serde = ["dep:serde", "tendermint-proto/std", "pbjson"]
 
 [package.metadata.docs.rs]
 all-features = true

cosmos-sdk-proto/src/prost/cosmos-sdk/cosmos.app.module.v1alpha1.rs

@@ -3,4 +3,5 @@
 #[allow(clippy::derive_partial_eq_without_eq)]
 #[derive(Clone, PartialEq, ::prost::Message)]
 pub struct Module {}
+include!("cosmos.app.module.v1alpha1.serde.rs");
 // @@protoc_insertion_point(module)

cosmos-sdk-proto/src/prost/cosmos-sdk/cosmos.app.module.v1alpha1.serde.rs

@@ -0,0 +1,79 @@
+// @generated
+#[cfg(feature = "serde")]
+impl serde::Serialize for Module {
+    #[allow(deprecated)]
+    fn serialize<S>(&self, serializer: S) -> std::result::Result<S::Ok, S::Error>
+    where
+        S: serde::Serializer,
+    {
+        use serde::ser::SerializeStruct;
+        let len = 0;
+        let struct_ser = serializer.serialize_struct("cosmos.app.module.v1alpha1.Module", len)?;
+        struct_ser.end()
+    }
+}
+#[cfg(feature = "serde")]
+impl<'de> serde::Deserialize<'de> for Module {
+    #[allow(deprecated)]
+    fn deserialize<D>(deserializer: D) -> std::result::Result<Self, D::Error>
+    where
+        D: serde::Deserializer<'de>,
+    {
+        const FIELDS: &[&str] = &[];
+
+        #[allow(clippy::enum_variant_names)]
+        enum GeneratedField {}
+        #[cfg(feature = "serde")]
+        impl<'de> serde::Deserialize<'de> for GeneratedField {
+            fn deserialize<D>(deserializer: D) -> std::result::Result<GeneratedField, D::Error>
+            where
+                D: serde::Deserializer<'de>,
+            {
+                struct GeneratedVisitor;
+
+                impl<'de> serde::de::Visitor<'de> for GeneratedVisitor {
+                    type Value = GeneratedField;
+
+                    fn expecting(
+                        &self,
+                        formatter: &mut std::fmt::Formatter<'_>,
+                    ) -> std::fmt::Result {
+                        write!(formatter, "expected one of: {:?}", &FIELDS)
+                    }
+
+                    #[allow(unused_variables)]
+                    fn visit_str<E>(self, value: &str) -> std::result::Result<GeneratedField, E>
+                    where
+                        E: serde::de::Error,
+                    {
+                        Err(serde::de::Error::unknown_field(value, FIELDS))
+                    }
+                }
+                deserializer.deserialize_identifier(GeneratedVisitor)
+            }
+        }
+        struct GeneratedVisitor;
+        impl<'de> serde::de::Visitor<'de> for GeneratedVisitor {
+            type Value = Module;
+
+            fn expecting(&self, formatter: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+                formatter.write_str("struct cosmos.app.module.v1alpha1.Module")
+            }
+
+            fn visit_map<V>(self, mut map_: V) -> std::result::Result<Module, V::Error>
+            where
+                V: serde::de::MapAccess<'de>,
+            {
+                while map_.next_key::<GeneratedField>()?.is_some() {
+                    let _ = map_.next_value::<serde::de::IgnoredAny>()?;
+                }
+                Ok(Module {})
+            }
+        }
+        deserializer.deserialize_struct(
+            "cosmos.app.module.v1alpha1.Module",
+            FIELDS,
+            GeneratedVisitor,
+        )
+    }
+}

cosmos-sdk-proto/src/prost/cosmos-sdk/cosmos.app.v1alpha1.rs

@@ -126,5 +126,6 @@ pub struct QueryConfigResponse {
     #[prost(message, optional, tag = "1")]
     pub config: ::core::option::Option<Config>,
 }
+include!("cosmos.app.v1alpha1.serde.rs");
 include!("cosmos.app.v1alpha1.tonic.rs");
 // @@protoc_insertion_point(module)