Give WePay complete payment logic in Phortune
Summary:
Ref T2787. This doesn't get all the edge cases quite correct, but is generally a safe, complete payment workflow:
- Shares the actual charging state logic.
- Makes it appropriately stateful with locking and transactions.
- Gets the main flow correct.
- Detects failure cases, just tends to blow up rather than help the user resolve them.
Test Plan:
- Charged with WePay.
- Charged with Infinite Free Money.
- Resumed an abandoned cart.
- Hit all failure states where we just dead-end the cart. Not ideal, but (seemingly) complete/safe/correct.
Reviewers: btrahan
Reviewed By: btrahan
Subscribers: epriestley
Maniphest Tasks: T2787
Differential Revision: https://secure.phabricator.com/D10639