SDK.finance Core Application | Part 7.4: Withdrawal Operation Overview and Provider Callback Flow

Описание: This video provides a complete overview of the Withdrawal operation workflow within the SDK.finance Gate module. Although the process is similar to the Top-Up flow, it uses a different strategy and dedicated methods for executing payout operations through external providers such as Corefy.

In SDK.finance, both top-up and withdrawal operations use the same REST endpoints to retrieve available providers, supported services and required pair fields. The key difference lies in the Submit step. During the withdrawal flow, the system selects the Redeem Sender Strategy and delegates execution to the Withdrawal Sender Gate Manager.

Inside the CorefyGateManager, the withdrawal process is handled through the initPayout method. This method builds and sends a request to the Corefy private API, receives the provider response and waits for the callback. Once the callback arrives, the SDK.finance system processes it, validates transaction data and updates the internal transaction state accordingly.

The video also demonstrates the full flow in Postman. After authorisation, the user retrieves providers that support EUR withdrawals and calculates commissions (for example, contract commission 3 and vendor commission 2). A Gate transaction is then created with the status provider_assigned.

Next, the user fetches pair fields and uses a previously generated card token from the top-up operation. After submitting the request, the transaction moves to a pending state while waiting for the callback. When the callback is processed, the transaction is marked as processed.

The UI also reflects the successful withdrawal, displaying the completed operation in the user’s account.

Learn more:
https://sdk.finance/

Knowledge Base & API Documentation: https://sdk.finance/knowledge-base/

Contact SDK.finance: https://sdk.finance/contact/

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