chore!: add min commission rates migration (prop 826)

app/upgrades/v15/upgrades.go

@@ -8,6 +8,8 @@ import (
 	"github.com/cosmos/gaia/v15/app/keepers"
 )
 
+// adhere to prop 826 which sets the minimum commission rate to 5% for all validators
+// https://www.mintscan.io/cosmos/proposals/826
 func CreateUpgradeHandler(
 	mm *module.Manager,
 	configurator module.Configurator,
@@ -21,7 +23,21 @@ func CreateUpgradeHandler(
 			return vm, err
 		}
 
-		ctx.Logger().Info("Upgrade complete")
+		params := keepers.StakingKeeper.GetParams(ctx)
+		params.MinCommissionRate = sdk.NewDecWithPrec(5, 2)
+		keepers.StakingKeeper.SetParams(ctx, params)
+
+		for _, val := range keepers.StakingKeeper.GetAllValidators(ctx) {
+			val := val
+			// update validator commission rate if it is less than 5%
+			if val.Commission.CommissionRates.Rate.LT(sdk.NewDecWithPrec(5, 2)) {
+				val.Commission.UpdateTime = ctx.BlockHeader().Time
+				val.Commission.CommissionRates.Rate = sdk.NewDecWithPrec(5, 2)
+				keepers.StakingKeeper.SetValidator(ctx, val)
+			}
+		}
+
+		ctx.Logger().Info("Upgrade v15 complete")
 		return vm, err
 	}
 }