add validation for last lock to reg_network

Author: camfairchild

pallets/subtensor/src/lib.rs

@@ -2365,6 +2365,12 @@ where
                 Ok((validity, Some(who.clone()), origin))
             }
             Some(Call::register_network { .. }) => {
+                let current_block = Self::get_current_block_as_u64();
+                let last_lock_block = Self::get_network_last_lock_block();
+                if current_block.saturating_sub(last_lock_block) >= NetworkRateLimit::<T>::get() {
+                    return Err(CustomTransactionError::RateLimitExceeded.into());
+                }
+
                 let validity = Self::validity_ok(Self::get_priority_vanilla());
                 Ok((validity, Some(who.clone()), origin))
             }