Added decode_response method

waku-bindings/src/lib.rs

@@ -5,6 +5,7 @@ mod decrypt;
 mod events;
 mod general;
 mod node;
+mod utils;
 
 pub use node::{
     waku_create_content_topic, waku_create_pubsub_topic, waku_dafault_pubsub_topic, waku_new,

waku-bindings/src/utils.rs

@@ -0,0 +1,20 @@
+use crate::general::{JsonResponse, Result};
+use serde::de::DeserializeOwned;
+use std::ffi::{c_char, CStr};
+
+/// Safety: The caller is responsible for ensuring that the pointer is valid for the duration of the call.
+/// This takes a pointer to a C string coming from the waku lib, that data is consumed and then freed using [`waku_sys::waku_utils_free`].
+pub fn decode_response<T: DeserializeOwned>(response_ptr: *mut c_char) -> Result<T> {
+    let response = unsafe { CStr::from_ptr(response_ptr) }
+        .to_str()
+        .expect("Response should always succeed to load to a &str");
+
+    let response: JsonResponse<T> =
+        serde_json::from_str(response).expect("JsonResponse should always succeed to deserialize");
+
+    unsafe {
+        waku_sys::waku_utils_free(response_ptr);
+    }
+
+    response.into()
+}