> ## Documentation Index > Fetch the complete documentation index at: https://waffo.com/docs/llms.txt > Use this file to discover all available pages before exploring further. # Chargeback file download > Get a time-limited pre-signed URL of a previously uploaded evidence file. The URL is valid for 5 minutes (see expiresAt); download the file from it with a plain GET, and call this API again once it expires. ## OpenAPI ````yaml /api-reference/openapi.json post /api/v1/chargeback/file/download openapi: 3.1.0 info: title: acquiring-order description: 接口文档 termsOfService: https://www.waffo.com version: 1.0.0 servers: - url: https://waffo.com description: Sandbox API (auto-signed via waffo.com signing proxy) security: [] tags: - name: Subscription inquiry description: Subscription inquiry api description - name: Subscription manage description: > This API allows the merchant to request a subscription management URL from Waffo Waffo will generate a subscription management URL which merchant can redirect user to this URL for managing subscription details (e.g. view subscription detail and cancel subscription). This management URL has a fixed expiration time (e.g., 1 day). - name: Subscription change inquiry description: > This API allows merchants to query the status of a subscription change (upgrade/downgrade) request. 此接口允许商户查询订阅升降级请求的状态。 - name: Subscription resume description: > Revoke a scheduled cancellation before it takes effect, so that the subscription keeps renewing. The next billing date stays unchanged. - name: Subscription update description: ' Subscription update api description' - name: Payment session update description: Payment session update api description - name: Order inquiry description: Order inquiry api description - name: Payout inquiry description: Payout inquiry api description - name: Order create description: ' Order create api description' - name: Pay Method Config Inquiry description: Pay Method Config Inquiry api description - name: Payment session create description: Payment session create api description - name: Order cancel description: Order cancel api description - name: Order capture description: Order capture api description - name: Subscription session create description: Subscription session create api description - name: Chargeback list description: Chargeback list api description - name: Payout create description: Payout create api description - name: Subscription session update description: Subscription session update api description - name: Payment session confirm description: Payment session confirm api description - name: Payment session validate description: Payment session validate api description - name: Payment session info description: Payment session info api description - name: Chargeback file download description: Chargeback file download api description - name: Subscription change description: > This API allows merchants to upgrade or downgrade a user's subscription plan. The change request will create a new subscription based on the original subscription, applying any remaining amount from the original subscription. 此接口允许商户升级或降级用户的订阅计划。升降级请求将基于原订阅创建新订阅，并将原订阅的剩余金额应用到新订阅中。 - name: Chargeback accept description: Chargeback accept api description - name: Chargeback file upload description: Chargeback file upload api description - name: Chargeback update description: Chargeback update api description - name: Wallet inquiry description: Wallet inquiry api description - name: Order refund description: Order refund api description - name: Refund inquiry description: Refund inquiry api description - name: Subscription cancel description: > Cancel an active subscription when the merchant no longer wishes to continue the recurring billing cycle. This endpoint can only be invoked when the subscription status is active - name: Merchant config inquiry description: Merchant config inquiry api description - name: Chargeback inquiry description: Chargeback inquiry api description - name: Subscription create description: Subscription create api description - name: Reported Fraud list description: Reported Fraud list api description paths: /api/v1/chargeback/file/download: post: tags: - 收单争议api接口 - Chargeback file download summary: Chargeback file download description: >- Get a time-limited pre-signed URL of a previously uploaded evidence file. The URL is valid for 5 minutes (see expiresAt); download the file from it with a plain GET, and call this API again once it expires. operationId: chargebackFileDownload requestBody: content: application/json: schema: $ref: '#/components/schemas/ChargebackFileDownloadRequest' required: true responses: '200': description: OK content: '*/*': schema: $ref: '#/components/schemas/ResponseChargebackFileDownloadResponse' components: schemas: ChargebackFileDownloadRequest: type: object description: Chargeback file download request properties: merchantId: type: string description: Merchant Id assigned by Waffo example: 1000000201 maxLength: 64 minLength: 0 fileId: type: string description: The fileId returned by the Chargeback file upload API example: 1766043193910/receipt.pdf maxLength: 256 minLength: 0 required: - fileId - merchantId ResponseChargebackFileDownloadResponse: type: object description: response data properties: code: type: string example: 0 msg: type: string example: success data: $ref: '#/components/schemas/ChargebackFileDownloadResponse' ChargebackFileDownloadResponse: type: object description: Chargeback file download response properties: fileId: type: string description: The fileId in the request example: 1766043193910/receipt.pdf downloadUrl: type: string description: >- Pre-signed URL of the file. Download it with a plain GET before expiresAt; request a new one once it expires expiresAt: type: string description: Expiry time of downloadUrl, ISO 8601 in UTC with milliseconds example: '2026-10-13T10:05:00.000Z' ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.