feat: track nomination pool members as active stakers

Add handlePoolBonded/handlePoolUnbonded handlers to Asset Hub SubQuery.
When a user bonds to a nomination pool, they are saved as an ActiveStaker
with networkId=AssetHub and stakingType=nomination-pool. This fixes the
wallet showing INACTIVE for HEZ stakers.

pezkuwi-assethub.yaml

@@ -34,6 +34,18 @@ dataSources:
           filter:
             module: nominationPools
             method: PaidOut
+        # Pool member bonded (track active stakers)
+        - handler: handlePoolBonded
+          kind: substrate/EventHandler
+          filter:
+            module: nominationPools
+            method: Bonded
+        # Pool member unbonded (cleanup active stakers)
+        - handler: handlePoolUnbonded
+          kind: substrate/EventHandler
+          filter:
+            module: nominationPools
+            method: Unbonded
         # Pool bonded slash
         - handler: handlePoolBondedSlash
           kind: substrate/EventHandler

src/index.ts

@@ -4,4 +4,5 @@ export * from "./mappings/Rewards";
 export * from "./mappings/PoolRewards";
 export * from "./mappings/Transfers";
 export * from "./mappings/NewEra";
+export * from "./mappings/PoolStakers";
 import "@pezkuwi/api-augment";

src/mappings/PoolStakers.ts

@@ -0,0 +1,68 @@
+import { SubstrateEvent } from "@subql/types";
+import { ActiveStaker } from "../types";
+import { Option } from "@pezkuwi/types";
+import {
+  PEZKUWI_ASSET_HUB_GENESIS,
+  STAKING_TYPE_NOMINATION_POOL,
+} from "./constants";
+
+/**
+ * Handle nominationPools.Bonded event
+ * Fired when a member bonds (joins or adds more) to a nomination pool.
+ * Creates an ActiveStaker entry for this address.
+ *
+ * Event data: [member: AccountId, pool_id: u32, bonded: Balance, joined: bool]
+ */
+export async function handlePoolBonded(
+  event: SubstrateEvent,
+): Promise<void> {
+  const {
+    event: {
+      data: [memberEncoded],
+    },
+  } = event;
+
+  const address = memberEncoded.toString();
+
+  const stakerId = `${PEZKUWI_ASSET_HUB_GENESIS}-${STAKING_TYPE_NOMINATION_POOL}-${address}`;
+  const staker = ActiveStaker.create({
+    id: stakerId,
+    networkId: PEZKUWI_ASSET_HUB_GENESIS,
+    stakingType: STAKING_TYPE_NOMINATION_POOL,
+    address,
+  });
+  await staker.save();
+
+  logger.info(`Pool staker added: ${address}`);
+}
+
+/**
+ * Handle nominationPools.Unbonded event
+ * Fired when a member unbonds from a nomination pool.
+ * If the member has no remaining points, remove the ActiveStaker entry.
+ *
+ * Event data: [member: AccountId, pool_id: u32, balance: Balance, points: Balance, era: u32]
+ */
+export async function handlePoolUnbonded(
+  event: SubstrateEvent,
+): Promise<void> {
+  const {
+    event: {
+      data: [memberEncoded],
+    },
+  } = event;
+
+  const address = memberEncoded.toString();
+
+  // Check if member still has points in the pool
+  const memberData = (await api.query.nominationPools.poolMembers(
+    address,
+  )) as Option<any>;
+
+  if (memberData.isNone || memberData.unwrap().points.toBigInt() === BigInt(0)) {
+    // Member fully left the pool - remove active staker
+    const stakerId = `${PEZKUWI_ASSET_HUB_GENESIS}-${STAKING_TYPE_NOMINATION_POOL}-${address}`;
+    await ActiveStaker.remove(stakerId);
+    logger.info(`Pool staker removed: ${address}`);
+  }
+}