Anton Kaliaev 11b68f1934
rewrite broadcastTxRoutine to use channels
https://play.golang.org/p/gN21yO9IRs3

```
func waitWithCancel(f func() *clist.CElement, ctx context.Context) *clist.CElement {
	el := make(chan *clist.CElement, 1)
	select {
	case el <- f():
```
will just run f() blockingly, so this doesn't change much in terms of behavior.
2018-02-05 16:36:26 +04:00
..