Imports
- github.com/ethereum/go-ethereum
- github.com/ethereum/go-ethereum/common
- github.com/ethereum/go-ethereum/core/types
- github.com/ethereum/go-ethereum/event
- github.com/pkg/errors
- github.com/prometheus/client_golang/prometheus
- github.com/sirupsen/logrus
- golang.org/x/sync/errgroup