package integration_test import ( "context" "errors" "time" "github.com/ethereum/go-ethereum/ethclient" ) func waitForBlock(ctx context.Context, client *ethclient.Client, target int64) error { timeout := 10 * time.Second for { select { case <-time.After(timeout): return errors.New("timed out") default: latest, err := client.BlockNumber(ctx) if err != nil { return err } if uint64(target) <= latest { return nil } } } }