Merge pull request #341 from hashgraph/sr/casts

refactor(rust): Replace some `as <pointer>` expressions with `cast*`

Author: mehcode

sdk/rust/src/ffi/contract_id.rs

@@ -33,7 +33,7 @@ impl ContractId {
         let crate::ContractId { shard, realm, num, evm_address } = rust;
 
         let evm_address =
-            evm_address.map(|it| NonNull::new(Box::into_raw(Box::new(it)) as *mut u8).unwrap());
+            evm_address.map(|it| NonNull::new(Box::into_raw(Box::new(it)).cast::<u8>()).unwrap());
 
         Self { shard, realm, num, evm_address }
     }

sdk/rust/src/ffi/execute.rs

@@ -119,7 +119,7 @@ pub unsafe extern "C" fn hedera_execute(
         };
 
         let response =
-            response.map(|response| CString::new(response).unwrap().into_raw() as *const c_char);
+            response.map(|response| CString::new(response).unwrap().into_raw().cast_const());
 
         let (err, response) = match response {
             Ok(response) => (Error::Ok, response),
@@ -129,7 +129,7 @@ pub unsafe extern "C" fn hedera_execute(
         callback.call(err, response);
 
         if !response.is_null() {
-            drop(unsafe { CString::from_raw(response as *mut _) });
+            drop(unsafe { CString::from_raw(response.cast_mut()) });
         }
     });
 

sdk/rust/src/ffi/signer.rs

@@ -130,7 +130,7 @@ impl CSigner {
         let signature_out = unsafe { slice::from_raw_parts(signature, signature_size) }.to_vec();
 
         unsafe {
-            (self.free_signature_func)(self.context, signature as *mut u8, signature_size);
+            (self.free_signature_func)(self.context, signature.cast_mut(), signature_size);
         }
 
         (self.public_key, signature_out)