update migration name

Author: open-junius

pallets/subtensor/src/migrations/migrate_set_first_emission_block_number.rs

@@ -0,0 +1,53 @@
+use super::*;
+use crate::HasMigrationRun;
+use frame_support::{traits::Get, weights::Weight};
+use scale_info::prelude::string::String;
+
+pub fn migrate_set_first_emission_block_number<T: Config>() -> Weight {
+    let migration_name = b"migrate_set_first_emission_block_number".to_vec();
+
+    let mut weight = T::DbWeight::get().reads(1);
+    if HasMigrationRun::<T>::get(&migration_name) {
+        log::info!(
+            "Migration '{:?}' has already run. Skipping.",
+            String::from_utf8_lossy(&migration_name)
+        );
+        return weight;
+    }
+
+    log::info!(
+        "Running migration '{:?}'",
+        String::from_utf8_lossy(&migration_name)
+    );
+
+    // ------------------------------
+    // Step 1: Set the first emission block for all subnets except root
+    // ------------------------------
+    let netuids = Pallet::<T>::get_all_subnet_netuids();
+    let current_block_number = Pallet::<T>::get_current_block_as_u64();
+    for netuid in netuids.iter() {
+        if *netuid != 0 {
+            FirstEmissionBlockNumber::<T>::insert(netuid, current_block_number);
+        }
+    }
+
+    // ------------------------------
+    // Step 2: Mark Migration as Completed
+    // ------------------------------
+
+    HasMigrationRun::<T>::insert(&migration_name, true);
+    weight = weight.saturating_add(T::DbWeight::get().reads(2));
+
+    if netuids.is_empty() {
+        weight = weight.saturating_add(T::DbWeight::get().writes(1_u64));
+    } else {
+        weight = weight.saturating_add(T::DbWeight::get().writes(netuids.len() as u64));
+    }
+
+    log::info!(
+        "Migration '{:?}' completed successfully.",
+        String::from_utf8_lossy(&migration_name)
+    );
+
+    weight
+}