fix(rpc): use node nonce for mint tx

core/application/src/query_runner.rs

@@ -466,6 +466,16 @@ impl SyncQueryRunnerInterface for QueryRunner {
         })
     }
 
+    fn get_node_nonce(&self, node_index: &NodeIndex) -> u64 {
+        self.inner.run(|ctx| {
+            self.node_table
+                .get(ctx)
+                .get(node_index)
+                .map(|node| node.nonce)
+                .unwrap_or_default()
+        })
+    }
+
     fn get_chain_id(&self) -> u32 {
         self.inner.run(
             |ctx| match self.metadata_table.get(ctx).get(&Metadata::ChainId) {

core/interfaces/src/application.rs

@@ -191,9 +191,12 @@ pub trait SyncQueryRunnerInterface: Clone + Send + Sync + 'static {
     /// Returns last executed block hash. [0;32] is genesis
     fn get_last_block(&self) -> [u8; 32];
 
-    /// Returns an accounts current nonce
+    /// Returns an account's current nonce
     fn get_account_nonce(&self, public_key: &EthAddress) -> u64;
 
+    /// Returns a node's current nonce
+    fn get_node_nonce(&self, node_index: &NodeIndex) -> u64;
+
     /// Returns the chain id
     fn get_chain_id(&self) -> u32;
 

core/rpc/src/handlers.rs

@@ -218,7 +218,11 @@ pub async fn mint_handler<C: Collection>(
         if balance > 1010 {
             return Ok("already minted".to_string());
         }
-        let nonce = data.query_runner.get_account_nonce(&params.public_key) + 1;
+        let node_pk = data.node_secret_key.to_pk();
+        let Some(node_index) = data.query_runner.pubkey_to_index(node_pk) else {
+            return Ok("rpc node is not staked".to_string());
+        };
+        let nonce = data.query_runner.get_node_nonce(&node_index) + 1;
         let method = UpdateMethod::Mint {
             recipient: params.public_key,
         };