chore: enable errcheck linter (#16406)

client/grpc_query_test.go

@@ -83,18 +83,20 @@ func (s *IntegrationTestSuite) SetupSuite() {
 	s.NoError(err)
 
 	// init chain will set the validator set and initialize the genesis accounts
-	app.InitChain(&abci.RequestInitChain{
+	_, err = app.InitChain(&abci.RequestInitChain{
 		Validators:      []abci.ValidatorUpdate{},
 		ConsensusParams: sims.DefaultConsensusParams,
 		AppStateBytes:   stateBytes,
 	},
 	)
+	s.NoError(err)
 
-	app.FinalizeBlock(&abci.RequestFinalizeBlock{
+	_, err = app.FinalizeBlock(&abci.RequestFinalizeBlock{
 		Height:             app.LastBlockHeight() + 1,
 		Hash:               app.LastCommitID().Hash,
 		NextValidatorsHash: valSet.Hash(),
 	})
+	s.NoError(err)
 
 	// end of app init
 

client/rpc/rpc_test.go

@@ -100,7 +100,8 @@ func (s *IntegrationTestSuite) TestQueryABCIHeight() {
 
 	for _, tc := range testCases {
 		s.Run(tc.name, func() {
-			s.network.WaitForHeight(tc.expHeight)
+			_, err := s.network.WaitForHeight(tc.expHeight)
+			s.Require().NoError(err)
 
 			val := s.network.Validators[0]