feat(rust): remove (C) usage of AccountId, add getter for payerAccountId

sdk/rust/src/client/mod.rs

@@ -44,6 +44,12 @@ impl Client {
         *self.payer_account_id.write() = Some(id);
     }
 
+    /// Gets the account that is, by default, paying for transactions and queries built with
+    /// this client.
+    pub fn payer_account_id(&self) -> Option<AccountId> {
+        self.payer_account_id.read().clone()
+    }
+
     /// Adds a signer that will, by default, sign for all transactions and queries built
     /// with this client.
     ///

sdk/rust/src/ffi/client.rs

@@ -21,11 +21,38 @@ pub extern "C" fn hedera_client_free(client: *mut Client) {
 /// Sets the account that will, by default, be paying for transactions and queries built with
 /// this client.
 #[no_mangle]
-pub extern "C" fn hedera_client_set_payer_account_id(client: *mut Client, id: AccountId) {
+pub extern "C" fn hedera_client_set_payer_account_id(
+    client: *mut Client,
+    id_shard: u64,
+    id_realm: u64,
+    id_num: u64,
+) {
     assert!(!client.is_null());
 
     let client = unsafe { &*client };
-    client.set_payer_account_id(id);
+    client.set_payer_account_id(AccountId { shard: id_shard, realm: id_realm, num: id_num });
+}
+
+/// Gets the account that is, by default, paying for transactions and queries built with
+/// this client.
+#[no_mangle]
+pub extern "C" fn hedera_client_get_payer_account_id(
+    client: *mut Client,
+    id_shard: *mut u64,
+    id_realm: *mut u64,
+    id_num: *mut u64,
+) {
+    assert!(!client.is_null());
+
+    let client = unsafe { &*client };
+
+    if let Some(payer_account_id) = client.payer_account_id() {
+        unsafe {
+            *id_shard = payer_account_id.shard;
+            *id_realm = payer_account_id.realm;
+            *id_num = payer_account_id.num;
+        }
+    }
 }
 
 /// Adds a signer that will, by default, sign for all transactions and queries built