feat: added callback counter query

src/contract.rs

@@ -68,6 +68,7 @@ pub fn query(deps: Deps, _env: Env, msg: QueryMsg) -> StdResult<Binary> {
     match msg {
         QueryMsg::GetContractState {} => to_binary(&query::state(deps)?),
         QueryMsg::GetChannel {} => to_binary(&query::channel(deps)?),
+        QueryMsg::GetCallbackCounter {} => to_binary(&query::callback_counter(deps)?),
     }
 }
 
@@ -140,6 +141,11 @@ mod query {
     pub fn channel(deps: Deps) -> StdResult<ChannelState> {
         CHANNEL_STATE.load(deps.storage)
     }
+
+    /// Returns the saved callback counter.
+    pub fn callback_counter(deps: Deps) -> StdResult<CallbackCounter> {
+        CALLBACK_COUNTER.load(deps.storage)
+    }
 }
 
 #[cfg(test)]

src/types/msg.rs

@@ -1,7 +1,7 @@
 use cosmwasm_schema::{cw_serde, QueryResponses};
 use cosmwasm_std::Binary;
 
-use crate::types::state::{ChannelState, ContractState};
+use crate::types::state::{CallbackCounter, ChannelState, ContractState};
 
 #[cw_serde]
 pub struct InstantiateMsg {
@@ -54,4 +54,6 @@ pub enum QueryMsg {
     GetChannel {},
     #[returns(ContractState)]
     GetContractState {},
+    #[returns(CallbackCounter)]
+    GetCallbackCounter {},
 }