executor: Migrate wasmtime backend to a high-level API

client/executor/common/src/wasm_runtime.rs

@@ -23,12 +23,6 @@ use sp_wasm_interface::Function;
 ///
 /// This can be implemented by an execution engine.
 pub trait WasmRuntime {
-	/// Attempt to update the number of heap pages available during execution.
-	///
-	/// Returns false if the update cannot be applied. The function is guaranteed to return true if
-	/// the heap pages would not change from its current value.
-	fn update_heap_pages(&mut self, heap_pages: u64) -> bool;
-
 	/// Return the host functions that are registered for this Wasm runtime.
 	fn host_functions(&self) -> &[&'static dyn Function];
 

client/executor/src/integration_tests/mod.rs

@@ -88,7 +88,7 @@ fn call_not_existing_function(wasm_method: WasmExecutionMethod) {
 				#[cfg(feature = "wasmtime")]
 				WasmExecutionMethod::Compiled => assert_eq!(
 					&format!("{:?}", e),
-					"Other(\"call to undefined external function with index 68\")"
+					"Other(\"Wasm execution trapped: call to a missing function env:missing_external\")"
 				),
 			}
 		}
@@ -117,7 +117,7 @@ fn call_yet_another_not_existing_function(wasm_method: WasmExecutionMethod) {
 				#[cfg(feature = "wasmtime")]
 				WasmExecutionMethod::Compiled => assert_eq!(
 					&format!("{:?}", e),
-					"Other(\"call to undefined external function with index 69\")"
+					"Other(\"Wasm execution trapped: call to a missing function env:yet_another_missing_external\")"
 				),
 			}
 		}