Add Zap digital bank mandate support to PaystackCore#126
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Introduce the Zap mandate API on the public `Paystack` surface:
`initiateZapMandate(_:)` initiates a mandate and `listenForZapResponse(onChannel:)`
subscribes for status updates (reusing the Pay-with-Transfer Pusher response shape).
- ZapMandateService posts to `bank/digitalbankmandate/{id}/{transactionId}`,
overriding `baseURL` to `https://standard.paystack.co`
- Make `baseURL` an overridable PaystackService requirement (defaults to
api.paystack.co) so services can target a non-default host
- Add `postForm`/`setFormBody` for application/x-www-form-urlencoded bodies
with percent-encoded fields
- Add ZapMandateRequest/ZapMandateResponse and SupportedBank models
- Decode `supported_banks` from the verify-access-code response
Tests: Zap initiate/listen, form-body encoding, and supported-banks decoding.
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Peter-John-paystack
requested review from
a team and
michael-paystack
as code owners
zaheer-paystack
approved these changes
Jun 23, 2026
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Introduce the Zap mandate API on the public
Paystacksurface:initiateZapMandate(_:)initiates a mandate andlistenForZapResponse(onChannel:)subscribes for status updates (reusing the Pay-with-Transfer Pusher response shape).
bank/digitalbankmandate/{id}/{transactionId}, overridingbaseURLtohttps://standard.paystack.cobaseURLan overridable PaystackService requirement (defaults to api.paystack.co) so services can target a non-default hostpostForm/setFormBodyfor application/x-www-form-urlencoded bodies with percent-encoded fieldssupported_banksfrom the verify-access-code responseTests: Zap initiate/listen, form-body encoding, and supported-banks decoding.