* Move type defs
* Move type guards
* Fix imports
* Extract prepareTotalItems to TS file
* usePaymentMethodInterface as TS file
* Fix TS props
* Fix currency type defs
* Add return type to usePaymentMethodInterface
* Add key prop to CartTotalItem
* Fixed up js tests
* Move SymbolPosition into type-defs package
Co-authored-by: Thomas Roberts <thomas.roberts@automattic.com>
* git move to ts files
* Type the checkout state provider
* Restore for loop for error handling
* Types not needed
* Consolodate response handling
* Unused import
* Fix defaults for onCheckoutAfterProcessingWithSuccess etc
* Type useEmitResponse and remove isObject checks
* useEmitResponse as const
* Check that redirectUrl is string
* Define actions as const
* data.redirectUrl should be truthy
* Add redirectURL todo item as followup
* remove null fallback
Mike Jolley