cross contract interface moved to separated file

contract-simple-rs/src/external_contract.rs

@@ -0,0 +1,8 @@
+use near_sdk::ext_contract;
+
+// Validator interface, for cross-contract calls
+#[ext_contract(hello_near)]
+trait HelloNear {
+    fn get_greeting(&self) -> String;
+    fn set_greeting(&self, greeting: String);
+}

contract-simple-rs/src/high_level.rs

@@ -1,15 +1,7 @@
 // Find all our documentation at https://docs.near.org
-use near_sdk::ext_contract;
 use near_sdk::{env, log, near, Promise, PromiseError};
 
-use crate::{Contract, ContractExt, FIVE_TGAS};
-
-// Validator interface, for cross-contract calls
-#[ext_contract(hello_near)]
-trait HelloNear {
-    fn get_greeting(&self) -> String;
-    fn set_greeting(&self, greeting: String);
-}
+use crate::{Contract, ContractExt, hello_near, FIVE_TGAS};
 
 #[near]
 impl Contract {

contract-simple-rs/src/lib.rs

@@ -1,6 +1,9 @@
 // Find all our documentation at https://docs.near.org
 use near_sdk::{env, near, AccountId, Gas, PanicOnDefault, NearToken};
 
+pub mod external_contract;
+pub use crate::external_contract::*;
+
 pub mod high_level;
 pub mod low_level;