diff --git a/ain-grpc/build.rs b/ain-grpc/build.rs
index f3d6be9..84928f3 100644
--- a/ain-grpc/build.rs
+++ b/ain-grpc/build.rs
@@ -71,7 +71,7 @@ const TYPE_ATTRS: &[Attr] = &[
         matcher: ".*",
         attr: Some("#[derive(Serialize, Deserialize)] #[serde(rename_all=\"camelCase\")]"),
         rename: None,
-        skip: &["^(Meta)?BlockResult", "NonUtxo", "^Transaction"],
+        skip: &["^BlockResult", "NonUtxo", "^Transaction"],
     },
     Attr {
         matcher: ".*",
@@ -92,13 +92,13 @@ const FIELD_ATTRS: &[Attr] = &[
         matcher: ":::prost::alloc::string::String",
         attr: Some("#[serde(skip_serializing_if = \"String::is_empty\")]"),
         rename: None,
-        skip: &["^(Meta)?BlockResult", "NonUtxo", "^Transaction"],
+        skip: &["^BlockResult", "NonUtxo", "^Transaction"],
     },
     Attr {
         matcher: ":::prost::alloc::vec::Vec",
         attr: Some("#[serde(skip_serializing_if = \"Vec::is_empty\")]"),
         rename: None,
-        skip: &["MetaBlockResult"],
+        skip: &[],
     },
     Attr {
         matcher: "req_sigs",
@@ -182,7 +182,7 @@ impl ServiceGenerator for WrappedGenerator {
         let re = Regex::new("\\[rpc: (.*?)\\]").unwrap();
         for method in &service.methods {
             let mut ref_map = self.methods.borrow_mut();
-            let vec = ref_map.entry(service.name.clone()).or_insert(vec![]);
+            let vec = ref_map.entry(service.name.clone()).or_default();
             let mut rpc = Rpc {
                 name: method.proto_name.clone(),
                 input_ty: method.input_proto_type.clone(),
@@ -303,7 +303,7 @@ fn modify_codegen(
                 Span::call_site(),
             ),
             Ident::new(
-                &format!("{}Server", server_mod).to_snek_case(),
+                &format!("{server_mod}Server").to_snek_case(),
                 Span::call_site(),
             ),
             Ident::new(&server_mod.to_pascal_case(), Span::call_site()),
@@ -455,6 +455,7 @@ fn apply_substitutions(
         #[allow(non_snake_case)]
         fn NewClient(addr: &str) -> Result<Box<Client>, Box<dyn std::error::Error>> {
             if CLIENTS.read().unwrap().get(addr).is_none() {
+                log::info!("Initializing RPC client for {}", addr);
                 let c = Client {
                     inner: Arc::new(HttpClientBuilder::default().build(addr)?),
                     handle: RUNTIME.rt_handle.clone(),
@@ -480,7 +481,7 @@ fn apply_substitutions(
         #[allow(dead_code)]
         fn missing_param(field: &str) -> jsonrpsee_core::Error {
             jsonrpsee_core::Error::Call(jsonrpsee_types::error::CallError::Custom(
-                jsonrpsee_types::ErrorObject::borrowed(-1, &format!("Missing required parameter '{}'", field), None).into_owned()
+                jsonrpsee_types::ErrorObject::borrowed(-1, &format!("Missing required parameter '{field}'"), None).into_owned()
             ))
         }
     };
diff --git a/ain-grpc/src/codegen.rs b/ain-grpc/src/codegen.rs
index 7428fd7..cd75308 100644
--- a/ain-grpc/src/codegen.rs
+++ b/ain-grpc/src/codegen.rs
@@ -52,48 +52,6 @@ impl<'de> Deserialize<'de> for types::BlockResult {
     }
 }
 
-impl Serialize for types::MetaBlockResult {
-    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
-    where
-        S: serde::Serializer,
-    {
-        if !self.hash.is_empty() {
-            return serializer.serialize_str(&self.hash);
-        }
-
-        if !self.block.is_empty() {
-            return self.block.serialize(serializer);
-        }
-
-        serializer.serialize_str("")
-    }
-}
-
-impl<'de> Deserialize<'de> for types::MetaBlockResult {
-    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
-    where
-        D: serde::Deserializer<'de>,
-    {
-        #[derive(Deserialize)]
-        #[serde(untagged)]
-        enum Res {
-            Hash(String),
-            Block(Vec<u8>),
-        }
-
-        match Res::deserialize(deserializer)? {
-            Res::Hash(s) => Ok(types::MetaBlockResult {
-                hash: s,
-                block: vec![],
-            }),
-            Res::Block(b) => Ok(types::MetaBlockResult {
-                hash: "".into(),
-                block: b,
-            }),
-        }
-    }
-}
-
 impl Serialize for types::Transaction {
     fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
     where
@@ -135,7 +93,7 @@ impl<'de> Deserialize<'de> for types::Transaction {
 
 #[cfg(test)]
 mod tests {
-    use super::types::{BlockResult, MetaBlockResult, Transaction};
+    use super::types::{BlockResult, Transaction};
 
     #[test]
     fn test_block_result_json() {
@@ -148,17 +106,6 @@ mod tests {
         assert_eq!(serde_json::to_value(&foo2).unwrap(), "foobar");
     }
 
-    #[test]
-    fn test_meta_block_result_json() {
-        let foo = MetaBlockResult {
-            hash: "foobar".into(),
-            block: vec![],
-        };
-        let res = serde_json::to_value(&foo).unwrap();
-        let foo2: MetaBlockResult = serde_json::from_value(res).unwrap();
-        assert_eq!(serde_json::to_value(&foo2).unwrap(), "foobar");
-    }
-
     #[test]
     fn test_transaction() {
         let foo = Transaction {
diff --git a/protobuf/rpc/dmc.proto b/protobuf/rpc/dmc.proto
index ca3b082..9b7639d 100644
--- a/protobuf/rpc/dmc.proto
+++ b/protobuf/rpc/dmc.proto
@@ -3,16 +3,12 @@ package rpc;
 
 import "types/dmc.proto";
 
-service Metachain {
-    // [rpc: metaConsensusRpc_getBlockHash] [client]
-    rpc GetBlockHash(types.MetaBlockInput) returns (types.MetaBlockResult);
-
-    // [rpc: metaConsensusRpc_getBlock] [client]
-    rpc GetBlock(types.MetaBlockInput) returns (types.MetaBlockResult);
+// NOTE: The definitions here must match those in metachain
 
+service Metachain {
     // [rpc: metaConsensusRpc_mintBlock] [client]
-    rpc MintBlock(types.MetaMintInput) returns (types.MetaMintResult);
+    rpc MetaMintBlock(types.MetaBlockInput) returns (types.MetaBlockResult);
 
     // [rpc: metaConsensusRpc_connectBlock] [client]
-    rpc ConnectBlock(types.MetaConnectBlockInput) returns (types.MetaConnectBlockResult);
+    rpc MetaConnectBlock(types.MetaConnectBlockInput) returns (types.MetaConnectBlockResult);
 }
diff --git a/protobuf/types/dmc.proto b/protobuf/types/dmc.proto
index 83cfacb..54af197 100644
--- a/protobuf/types/dmc.proto
+++ b/protobuf/types/dmc.proto
@@ -1,39 +1,26 @@
 syntax = "proto3";
 package types;
 
+// NOTE: The definitions here must match those in metachain
+
 message MetaTransaction {
     string from = 1;
     string to = 2;
     int64 amount = 3;
-    string signature = 4;
 }
 
 message MetaBlockInput {
-    int64 at = 1; // [default: -1]
+    repeated MetaTransaction txs = 2;
 }
 
 message MetaBlockResult {
-    string hash = 1;
-    bytes block = 2;
-}
-
-message MetaMintInput {
-    repeated MetaTransaction dnc_txs = 1;
-    uint64 secret = 2; // secret obtained from handshake
-}
-
-message MetaMintResult {
-    bytes block = 1;
-    repeated MetaTransaction dmc_txs = 2;
+    bytes payload = 1;
 }
 
 message MetaConnectBlockInput {
-    bytes dmc_payload = 1;
-    repeated MetaTransaction dnc_txs = 2;
-    uint64 secret = 3; // secret obtained from handshake
+    bytes payload = 1;
 }
 
 message MetaConnectBlockResult {
-    bool imported = 1;
-    repeated MetaTransaction dmc_txs = 2;
+    string hash = 1;
 }