I will integrate or fix flutter payments with stripe paypal or razorpay

No. Basic repairs one agreed issue in an existing payment flow. Standard and Premium cover a new integration.

Basic/Standard cover one agreed Android or iOS target. Premium covers both for the same Flutter app and payment flow. Web is separately assessed.

Standard/Premium include the scoped Node.js or Firebase payment work. Basic repairs an existing flow; building a new backend is not included.

We agree sandbox success, failure/cancellation and relevant backend/order-state checks. A successful provider screen alone is not the whole acceptance test.

For new webhook work, repeated accepted events must not repeat the same business action. Duplicate-event protection is part of the scoped integration and its tests.

No. The provider controls eligibility, account approval and transaction acceptance. I implement and test the agreed flow for your eligible account.

Refund endpoint: Premium as scoped. Subscriptions and store submission: separate extras/custom scope. Confirm the business type and eligibility before ordering.

Seven days for defects in delivered changes. Unrelated application issues, new features and third-party policy changes need new scope.

Provide a buildable repository, setup steps and scoped sandbox developer access. Keep passwords, live secret keys and customer payment data out of Fiverr chat. Enter production secrets directly in your own hosting environment.

Each package covers one gateway and one checkout flow. An additional supported gateway can be quoted after reviewing your backend, currency and platforms. Marketplace split payouts and Stripe Connect require separate scope.