Tyera Eulberg 807c69d97c
Slimmer implementation of credit-only accounts (#4592)
* Add credit-only debit/data check to verify_instruction

* Store credits and pass to accounts_db

* Add InstructionErrors and tests

* Relax account locks for credit-only accounts

* Collect credit-only account credits before passing to accounts_db to store properly

* Convert System Transfer  accounts to credit-only, and fixup test

* Functionalize collect_accounts to unit test

* Review comments

* Rebase
2019-06-10 20:50:02 -06:00
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2019-06-10 11:00:15 -07:00