diff --git a/examples/Cargo.lock b/examples/Cargo.lock
index 74bcaebe..720c82bf 100644
--- a/examples/Cargo.lock
+++ b/examples/Cargo.lock
@@ -590,9 +590,12 @@ dependencies = [
  "anyhow",
  "cosmwasm-schema",
  "cosmwasm-std",
+ "custom-and-generic",
  "cw-multi-test",
  "cw-storage-plus",
  "cw-utils",
+ "cw1",
+ "generic",
  "serde",
  "sylvia",
 ]
diff --git a/examples/contracts/generic_contract/Cargo.toml b/examples/contracts/generic_contract/Cargo.toml
index a34ded2b..af6f57dd 100644
--- a/examples/contracts/generic_contract/Cargo.toml
+++ b/examples/contracts/generic_contract/Cargo.toml
@@ -24,6 +24,9 @@ cw-storage-plus = "1.0"
 cw-utils = "1.0"
 serde = { version = "1.0", default-features = false, features = ["derive"] }
 sylvia = { path = "../../../sylvia" }
+cw1 = { path = "../../interfaces/cw1" }
+generic = { path = "../../interfaces/generic" }
+custom-and-generic = { path = "../../interfaces/custom-and-generic" }
 
 [dev-dependencies]
 anyhow = "1.0"
diff --git a/examples/contracts/generic_contract/src/bin/schema.rs b/examples/contracts/generic_contract/src/bin/schema.rs
index a8828949..f84d1bb3 100644
--- a/examples/contracts/generic_contract/src/bin/schema.rs
+++ b/examples/contracts/generic_contract/src/bin/schema.rs
@@ -2,13 +2,12 @@ use cosmwasm_schema::write_api;
 
 #[cfg(not(tarpaulin_include))]
 fn main() {
-    use generic_contract::contract::{
-        ContractExecMsg, ContractQueryMsg, ExternalMsg, InstantiateMsg,
-    };
+    use generic_contract::contract::{ContractExecMsg, ContractQueryMsg, InstantiateMsg};
+    use sylvia::types::SvCustomMsg;
 
     write_api! {
-        instantiate: InstantiateMsg<ExternalMsg>,
-        execute: ContractExecMsg<ExternalMsg>,
-        query: ContractQueryMsg<ExternalMsg>,
+        instantiate: InstantiateMsg<SvCustomMsg>,
+        execute: ContractExecMsg<SvCustomMsg>,
+        query: ContractQueryMsg<SvCustomMsg>,
     }
 }
diff --git a/examples/contracts/generic_contract/src/contract.rs b/examples/contracts/generic_contract/src/contract.rs
index 9ef1ee4b..e253e06e 100644
--- a/examples/contracts/generic_contract/src/contract.rs
+++ b/examples/contracts/generic_contract/src/contract.rs
@@ -1,14 +1,11 @@
-use cosmwasm_schema::cw_serde;
 use cosmwasm_std::{Reply, Response, StdResult};
 use serde::de::DeserializeOwned;
 use serde::Deserialize;
-use sylvia::types::{CustomMsg, ExecCtx, InstantiateCtx, MigrateCtx, QueryCtx, ReplyCtx};
+use sylvia::types::{
+    CustomMsg, ExecCtx, InstantiateCtx, MigrateCtx, QueryCtx, ReplyCtx, SvCustomMsg,
+};
 use sylvia::{contract, schemars};
 
-#[cw_serde]
-pub struct ExternalMsg;
-impl cosmwasm_std::CustomMsg for ExternalMsg {}
-
 pub struct GenericContract<InstantiateParam, ExecParam, QueryParam, MigrateParam, RetType>(
     std::marker::PhantomData<(
         InstantiateParam,
@@ -20,6 +17,10 @@ pub struct GenericContract<InstantiateParam, ExecParam, QueryParam, MigrateParam
 );
 
 #[contract]
+#[messages(cw1 as Cw1: custom(msg))]
+#[messages(generic<SvCustomMsg, SvCustomMsg, sylvia::types::SvCustomMsg> as Generic: custom(msg))]
+#[messages(custom_and_generic<SvCustomMsg, SvCustomMsg, sylvia::types::SvCustomMsg> as CustomAndGeneric)]
+#[sv::custom(msg=SvCustomMsg)]
 impl<InstantiateParam, ExecParam, QueryParam, MigrateParam, RetType>
     GenericContract<InstantiateParam, ExecParam, QueryParam, MigrateParam, RetType>
 where
@@ -34,64 +35,79 @@ where
     }
 
     #[msg(instantiate)]
-    pub fn instantiate(&self, _ctx: InstantiateCtx, _msg: InstantiateParam) -> StdResult<Response> {
+    pub fn instantiate(
+        &self,
+        _ctx: InstantiateCtx,
+        _msg: InstantiateParam,
+    ) -> StdResult<Response<SvCustomMsg>> {
         Ok(Response::new())
     }
 
     #[msg(exec)]
-    pub fn execute(&self, _ctx: ExecCtx, _msg: ExecParam) -> StdResult<Response> {
+    pub fn contract_execute(
+        &self,
+        _ctx: ExecCtx,
+        _msg: ExecParam,
+    ) -> StdResult<Response<SvCustomMsg>> {
         Ok(Response::new())
     }
 
     #[msg(query)]
-    pub fn query(&self, _ctx: QueryCtx, _msg: QueryParam) -> StdResult<Response> {
+    pub fn contract_query(
+        &self,
+        _ctx: QueryCtx,
+        _msg: QueryParam,
+    ) -> StdResult<Response<SvCustomMsg>> {
         Ok(Response::new())
     }
 
     #[msg(migrate)]
-    pub fn migrate(&self, _ctx: MigrateCtx, _msg: MigrateParam) -> StdResult<Response> {
+    pub fn migrate(
+        &self,
+        _ctx: MigrateCtx,
+        _msg: MigrateParam,
+    ) -> StdResult<Response<SvCustomMsg>> {
         Ok(Response::new())
     }
 
     #[allow(dead_code)]
     #[msg(reply)]
-    fn reply(&self, _ctx: ReplyCtx, _reply: Reply) -> StdResult<Response> {
+    fn reply(&self, _ctx: ReplyCtx, _reply: Reply) -> StdResult<Response<SvCustomMsg>> {
         Ok(Response::new())
     }
 }
 
 #[cfg(test)]
 mod tests {
+    use super::multitest_utils::CodeId;
     use sylvia::multitest::App;
-
-    use crate::contract::ExternalMsg;
+    use sylvia::types::SvCustomMsg;
 
     #[test]
     fn generic_contract() {
-        use super::multitest_utils::CodeId;
-        let app = App::default();
+        let app = App::<cw_multi_test::BasicApp<SvCustomMsg>>::custom(|_, _, _| {});
         let code_id: CodeId<
-            ExternalMsg,
-            ExternalMsg,
-            ExternalMsg,
-            super::ExternalMsg,
-            super::ExternalMsg,
+            SvCustomMsg,
+            SvCustomMsg,
+            SvCustomMsg,
+            super::SvCustomMsg,
+            super::SvCustomMsg,
             _,
         > = CodeId::store_code(&app);
 
         let owner = "owner";
 
         let contract = code_id
-            .instantiate(ExternalMsg {})
+            .instantiate(SvCustomMsg {})
             .with_label("GenericContract")
             .with_admin(owner)
             .call(owner)
             .unwrap();
 
-        contract.execute(ExternalMsg).call(owner).unwrap();
-        contract.query(ExternalMsg).unwrap();
+        contract.contract_execute(SvCustomMsg).call(owner).unwrap();
+        contract.contract_query(SvCustomMsg).unwrap();
         contract
-            .migrate(ExternalMsg)
+            .migrate(SvCustomMsg)
             .call(owner, code_id.code_id())
             .unwrap();
     }
diff --git a/examples/contracts/generic_contract/src/custom_and_generic.rs b/examples/contracts/generic_contract/src/custom_and_generic.rs
new file mode 100644
index 00000000..98926abc
--- /dev/null
+++ b/examples/contracts/generic_contract/src/custom_and_generic.rs
@@ -0,0 +1,77 @@
+use cosmwasm_std::{CosmosMsg, Response, StdError, StdResult};
+use custom_and_generic::CustomAndGeneric;
+use sylvia::contract;
+use sylvia::types::{ExecCtx, QueryCtx, SvCustomMsg};
+
+#[contract(module = crate::contract)]
+#[messages(custom_and_generic as CustomAndGeneric)]
+#[sv::custom(msg=sylvia::types::SvCustomMsg)]
+impl<InstantiateParam, ExecParam, QueryParam, MigrateParam, RetType>
+    CustomAndGeneric<SvCustomMsg, SvCustomMsg, sylvia::types::SvCustomMsg>
+    for crate::contract::GenericContract<
+        InstantiateParam,
+        ExecParam,
+        QueryParam,
+        MigrateParam,
+        RetType,
+    >
+{
+    type Error = StdError;
+
+    #[msg(exec)]
+    fn custom_generic_execute(
+        &self,
+        _ctx: ExecCtx,
+        _msgs: Vec<CosmosMsg<sylvia::types::SvCustomMsg>>,
+    ) -> StdResult<Response<SvCustomMsg>> {
+        Ok(Response::new())
+    }
+
+    #[msg(query)]
+    fn custom_generic_query(
+        &self,
+        _ctx: QueryCtx,
+        _msg: sylvia::types::SvCustomMsg,
+    ) -> StdResult<SvCustomMsg> {
+        Ok(SvCustomMsg {})
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::test_utils::CustomAndGeneric;
+    use crate::contract::multitest_utils::CodeId;
+    use sylvia::{multitest::App, types::SvCustomMsg};
+
+    #[test]
+    fn proxy_methods() {
+        let app = App::<cw_multi_test::BasicApp<SvCustomMsg>>::custom(|_, _, _| {});
+        let code_id = CodeId::<
+            SvCustomMsg,
+            sylvia::types::SvCustomMsg,
+            SvCustomMsg,
+            SvCustomMsg,
+            sylvia::types::SvCustomMsg,
+            _,
+        >::store_code(&app);
+
+        let owner = "owner";
+
+        let contract = code_id
+            .instantiate(SvCustomMsg {})
+            .with_label("GenericContract")
+            .with_admin(owner)
+            .call(owner)
+            .unwrap();
+
+        contract
+            .custom_and_generic_proxy()
+            .custom_generic_execute(vec![])
+            .call(owner)
+            .unwrap();
+        contract
+            .custom_and_generic_proxy()
+            .custom_generic_query(SvCustomMsg {})
+            .unwrap();
+    }
+}
diff --git a/examples/contracts/generic_contract/src/cw1.rs b/examples/contracts/generic_contract/src/cw1.rs
new file mode 100644
index 00000000..48bd0870
--- /dev/null
+++ b/examples/contracts/generic_contract/src/cw1.rs
@@ -0,0 +1,70 @@
+use cosmwasm_std::{CosmosMsg, Response, StdError, StdResult};
+use cw1::{CanExecuteResp, Cw1};
+use sylvia::contract;
+use sylvia::types::{ExecCtx, QueryCtx};
+
+#[contract(module = crate::contract)]
+#[messages(cw1 as Cw1)]
+#[sv::custom(msg=sylvia::types::SvCustomMsg)]
+impl<InstantiateParam, ExecParam, QueryParam, MigrateParam, RetType> Cw1
+    for crate::contract::GenericContract<
+        InstantiateParam,
+        ExecParam,
+        QueryParam,
+        MigrateParam,
+        RetType,
+    >
+{
+    type Error = StdError;
+
+    #[msg(exec)]
+    fn execute(&self, _ctx: ExecCtx, _msgs: Vec<CosmosMsg>) -> StdResult<Response> {
+        Ok(Response::new())
+    }
+
+    #[msg(query)]
+    fn can_execute(
+        &self,
+        _ctx: QueryCtx,
+        _sender: String,
+        _msg: CosmosMsg,
+    ) -> StdResult<CanExecuteResp> {
+        Ok(CanExecuteResp::default())
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::test_utils::Cw1;
+    use crate::contract::multitest_utils::CodeId;
+    use cosmwasm_std::{CosmosMsg, Empty};
+    use sylvia::{multitest::App, types::SvCustomMsg};
+
+    #[test]
+    fn proxy_methods() {
+        let app = App::<cw_multi_test::BasicApp<SvCustomMsg>>::custom(|_, _, _| {});
+        let code_id = CodeId::<
+            SvCustomMsg,
+            sylvia::types::SvCustomMsg,
+            SvCustomMsg,
+            SvCustomMsg,
+            sylvia::types::SvCustomMsg,
+            _,
+        >::store_code(&app);
+
+        let owner = "owner";
+
+        let contract = code_id
+            .instantiate(SvCustomMsg {})
+            .with_label("GenericContract")
+            .with_admin(owner)
+            .call(owner)
+            .unwrap();
+
+        contract.cw1_proxy().execute(vec![]).call(owner).unwrap();
+        contract
+            .cw1_proxy()
+            .can_execute("sender".to_owned(), CosmosMsg::Custom(Empty {}))
+            .unwrap();
+    }
+}
diff --git a/examples/contracts/generic_contract/src/generic.rs b/examples/contracts/generic_contract/src/generic.rs
new file mode 100644
index 00000000..aef1ac96
--- /dev/null
+++ b/examples/contracts/generic_contract/src/generic.rs
@@ -0,0 +1,80 @@
+use cosmwasm_std::{CosmosMsg, Response, StdError, StdResult};
+use generic::Generic;
+use sylvia::contract;
+use sylvia::types::{ExecCtx, QueryCtx, SvCustomMsg};
+
+#[contract(module = crate::contract)]
+#[messages(generic as Generic)]
+#[sv::custom(msg=SvCustomMsg)]
+impl<InstantiateParam, ExecParam, QueryParam, MigrateParam, RetType>
+    Generic<SvCustomMsg, SvCustomMsg, sylvia::types::SvCustomMsg>
+    for crate::contract::GenericContract<
+        InstantiateParam,
+        ExecParam,
+        QueryParam,
+        MigrateParam,
+        RetType,
+    >
+{
+    type Error = StdError;
+
+    #[msg(exec)]
+    fn generic_exec(
+        &self,
+        _ctx: ExecCtx,
+        _msgs: Vec<CosmosMsg<sylvia::types::SvCustomMsg>>,
+    ) -> StdResult<Response> {
+        Ok(Response::new())
+    }
+
+    // Sylvia will fail if single type is used to match against two different generics
+    // It's because we have to map unique generics used as they can be used multiple times.
+    // If for some reason like here one type would be used in place of two generics either full
+    // path or some alias has to be used.
+    #[msg(query)]
+    fn generic_query(
+        &self,
+        _ctx: QueryCtx,
+        _msg: sylvia::types::SvCustomMsg,
+    ) -> StdResult<SvCustomMsg> {
+        Ok(SvCustomMsg {})
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::test_utils::Generic;
+    use crate::contract::multitest_utils::CodeId;
+    use cosmwasm_std::CosmosMsg;
+    use sylvia::multitest::App;
+    use sylvia::types::SvCustomMsg;
+
+    #[test]
+    fn proxy_methods() {
+        let app = App::<cw_multi_test::BasicApp<SvCustomMsg>>::custom(|_, _, _| {});
+        let code_id: CodeId<
+            SvCustomMsg,
+            sylvia::types::SvCustomMsg,
+            SvCustomMsg,
+            SvCustomMsg,
+            sylvia::types::SvCustomMsg,
+            _,
+        > = CodeId::store_code(&app);
+
+        let owner = "owner";
+
+        let contract = code_id
+            .instantiate(SvCustomMsg {})
+            .with_label("GenericContract")
+            .with_admin(owner)
+            .call(owner)
+            .unwrap();
+
+        contract
+            .generic_proxy()
+            .generic_exec(vec![CosmosMsg::Custom(SvCustomMsg {})])
+            .call(owner)
+            .unwrap();
+        contract.generic_proxy().generic_query(SvCustomMsg).unwrap();
+    }
+}
diff --git a/examples/contracts/generic_contract/src/lib.rs b/examples/contracts/generic_contract/src/lib.rs
index 2943dbb5..ea8b3738 100644
--- a/examples/contracts/generic_contract/src/lib.rs
+++ b/examples/contracts/generic_contract/src/lib.rs
@@ -1 +1,4 @@
 pub mod contract;
+pub mod custom_and_generic;
+pub mod cw1;
+pub mod generic;