* Update API to return empty next page token on last page response
* Update tests
* Merge branch 'master' into api-return-empty-page-token-on-last-page
* Need to sync latest ethereum API, will do it in master
* Added pagination wrapper
* Implemented ListValidatorAssignments
* Finished tests
* Fixed tests
* Raul's feedback
* Fmt
* Pagination test
* Removed extra loggings