Do not panic when getting params.

Author: DimitrisJim

modules/core/03-connection/keeper/keeper.go

@@ -226,8 +226,8 @@ func (k Keeper) addConnectionToClient(ctx sdk.Context, clientID, connectionID st
 func (k Keeper) GetParams(ctx sdk.Context) types.Params {
 	store := ctx.KVStore(k.storeKey)
 	bz := store.Get([]byte(types.ParamsKey))
-	if bz == nil { // only panic on unset params and not on empty params
-		panic("controller params are not set in store")
+	if len(bz) == 0 {
+		return types.Params{}
 	}
 
 	var params types.Params

modules/core/03-connection/keeper/keeper_test.go

@@ -217,14 +217,12 @@ func (suite *KeeperTestSuite) TestParams() {
 	}
 }
 
-// TestUnsetParams tests that trying to get params that are not set panics.
+// TestUnsetParams tests that trying to get params that are not set results in empty params.
 func (suite *KeeperTestSuite) TestUnsetParams() {
 	suite.SetupTest()
 	ctx := suite.chainA.GetContext()
 	store := ctx.KVStore(suite.chainA.GetSimApp().GetKey(exported.StoreKey))
 	store.Delete([]byte(types.ParamsKey))
 
-	suite.Require().Panics(func() {
-		suite.chainA.GetSimApp().IBCKeeper.ConnectionKeeper.GetParams(ctx)
-	})
+	suite.Require().Equal(suite.chainA.GetSimApp().IBCKeeper.ConnectionKeeper.GetParams(ctx), types.Params{})
 }