feat(katana): modify DevApi trait with new endpoints

crates/katana/rpc/rpc-api/src/dev.rs

@@ -24,4 +24,15 @@ pub trait DevApi {
 
     #[method(name = "predeployedAccounts")]
     async fn predeployed_accounts(&self) -> RpcResult<Vec<Account>>;
+
+    #[method(name = "accountBalance")]
+    async fn account_balance (&self, contract_address: Felt) -> RpcResult<u64>;
+
+    #[method(name = "feeToken")]
+    async fn fee_token  (&self) -> RpcResult<u64>;
+
+    #[method(name = "mint")]
+    async fn mint (&self) -> RpcResult<()>;
+
+
 }

crates/katana/rpc/rpc/src/dev.rs

@@ -92,6 +92,18 @@
         Ok(())
     }
 
+    async fn account_balance(&self, _contract_address: Felt) -> Result<u64, Error> {
+        Ok(1)
+    }
+
+    async fn fee_token(&self,) -> Result<u64, Error> {
+        Ok(1)
+    }
+
+    async fn mint(&self) -> Result<(), Error> {
+        Ok(())
+    }
+
     #[allow(deprecated)]
     async fn predeployed_accounts(&self) -> Result<Vec<Account>, Error> {
         Ok(self.backend.config.genesis.accounts().map(|e| Account::new(*e.0, e.1)).collect())