Fix indexed attestations Slasher store (#3897)

* first version of the watchtower api

* service files

* Begin work on grpc server

* More changes to server

* REnames and mock setup

* working test

* merge

* double propose detection test

* nishant review

* todo change

* gaz

* fix service

* gaz

* remove unused import

* gaz

* resolve circular dependency

* resolve circular dependency 2nd try

* remove package

* fix package

* fix test

* added tests

* gaz

* remove status check

* gaz

* remove context

* remove context

* change var name

* moved to rpc dir

* gaz

* remove server code

* gaz

* slasher server

* visibility change

* pb

* service update

* gaz

* slasher grpc server

* making it work

* setup db and start

* gaz

* service flags fixes

* grpc service running

* go imports

* remove new initializer

* gaz

* remove feature flags

* change back SetupSlasherDB

* fix SetupSlasherDB calls

* define err

* fix bad merge

* fix test

* fix imports

* fix imports

* fix imports

* add cancel

* comment stop

* fix cancel issue

* remove unneeded code

* bring back bad merge that removed TODO

* remove use of epoch as am input

* fixed slasher to be runable again

* wait for channel close

* gaz

* small test

* flags fix

* fix flag order

tools/extractor/main.go

@@ -16,7 +16,6 @@ var (
 	datadir = flag.String("datadir", "", "Path to data directory.")
 
 	state = flag.Uint("state", 0, "Extract state at this slot.")
-
 )
 
 func init() {