* flatten out batcher goroutines

* move wg increment to parent fn

* ensure mainloop closes before receipts loop

* add comments

* pass a context to both loops

* remove debug lines

* clean up mutex handling in receiptsLoop

* don't need to set default value the first time
* avoid writing to Logger while holding mutex

* typo

* increase log level and include tx.ID

* fix changes from merge, hoist throttling loop goroutine launch to driver

* call done on waitgroup in throttlingLoop

* move function around

hoping this makes the diff nicer