플러터 자동 결제 구현 질문드립니다.

.
Flutter , 는 Firebase/.

(Billing) , .

⚠️
1. -> .
: POST /issue-billing-key
: 400 Bad Request

Message: Invalid or missing authKey
Code: AUTH_KEY_INVALID

2.
: POST /confirm-billing
: 403 Forbidden

Message: Billing key is not valid or expired
Code: BILLING_KEY_INVALID

련 SDK, .

?
1)
2)
3) ,

, .
billing-flow.png
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