go eth tools
https://github.com/miguelmota/ethereum-development-with-go-book/tree/master/code
build
CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o monitor_eth_balance_linux64 monitor_eth_balance.go
CGO_ENABLED=0 GOOS=windows GOARCH=amd64 go build -o monitor_eth_balance_windows64 monitor_eth_balance.go
CGO_ENABLED=0 GOOS=darwin GOARCH=amd64 go build -o monitor_eth_balance_darwin64 monitor_eth_balance.go