feat: add endblocker with valsetupdate type (#15829)

x/staking/keeper/abci.go

@@ -0,0 +1,26 @@
+package keeper
+
+import (
+	"context"
+	"time"
+
+	abci "github.com/cometbft/cometbft/abci/types"
+	"github.com/cosmos/cosmos-sdk/telemetry"
+	sdk "github.com/cosmos/cosmos-sdk/types"
+	"github.com/cosmos/cosmos-sdk/x/staking/types"
+)
+
+// BeginBlocker will persist the current header and validator set as a historical entry
+// and prune the oldest entry based on the HistoricalEntries parameter
+func (k *Keeper) BeginBlocker(ctx sdk.Context) {
+	defer telemetry.ModuleMeasureSince(types.ModuleName, time.Now(), telemetry.MetricKeyBeginBlocker)
+
+	k.TrackHistoricalInfo(ctx)
+}
+
+// Called every block, update validator set
+func (k *Keeper) EndBlocker(ctx context.Context) ([]abci.ValidatorUpdate, error) {
+	defer telemetry.ModuleMeasureSince(types.ModuleName, time.Now(), telemetry.MetricKeyEndBlocker)
+
+	return k.BlockValidatorUpdates(sdk.UnwrapSDKContext(ctx)), nil
+}