ongoing work on rust runner

rust-runner/src/main.rs

@@ -11,10 +11,10 @@ mod alloc;
 mod storage;
 
 use std::env;
+use parity_wasm::interpreter::ModuleInstanceInterface;
 
 fn main() {
-    /// First, load wasm contract as a module
-
+    // First, load wasm contract as a module
     wasm_utils::init_log();
 
     let args = env::args().collect::<Vec<_>>();
@@ -25,17 +25,17 @@ fn main() {
 
     let module = parity_wasm::deserialize_file(&args[1]).expect("Module deserialization to succeed");
 
-    /// Second, create program instance
+    // Second, create program instance
     let program = parity_wasm::interpreter::ProgramInstance::new().expect("Program instance to be created");
 
-    /// Add module to the programm
-    program.add_module("contract", module);
+    // Add module to the programm
+    let module_instance = program.add_module("contract", module).expect("Module to be added successfully");
 
-    /// Create allocator
+    // Create allocator
     let mut allocator = alloc::Arena::new(5*1024*1024);
 
+    // Invoke _call method of the module
+    module_instance.execute_export("_call", vec![]).expect("_call to execute successfully");
 
-    /// Invoke _call method of the module
-
-    /// ???
+    // ???
 }