* refactor and reorder checkout processing
* improve handling of checkout POST with mixed success:
- return coupon errors in a property
- don't throw from coupon validation:
- return info about errors to route handler
- tweak logic in route handler to prevent subsequent processing
- default payment result to fail to avoid accidental successful checkout
- in client, catch errors and new customer id:
- render any errors as notices - i.e. coupon error
- if a customer ID is included, push into store (so UI updates)
* fix linter whitespace issue from rebase merge
* fix MIA order validation/errors (due to rebase):
- reinstate thrown exception when validating order
- return exception was an experiment, now solved in woocommerce/woocommerce-blocks#3454
* hide "Create account" checkbox if account is created during an error response:
- update store with new user id
- remove stale response.errors handling;
- current approach (https://github.com/woocommerce/woocommerce-blocks/pull/3454) is to add data to error response
* show a notice informing user that they have signed up
* white space
* Handle header and update typedef
* Remove "errors" schema
* remove errors
Co-authored-by: Mike Jolley <mike.jolley@me.com>
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