Payment form with fixed amount

Configure webhooks to receive updates for fixed amount payment forms, automating notifications for reliable and timely crypto transaction updates.

Webhook Respond

The deposits report is implemented by means of webhooks.

For more information on setting up Webhooks, see Setting up Webhooks.

Set the Webhook URL in the menu Merchant\Classic processing\WebhookURL to receive a callback about payment status. Required https (TLS/SSL)

Webhook password - password required to verify the payment signature

Webhook URL - the address in the system from which the payment is made. This address will be used to send updates on the status of payments:

Request method: POST

Response Type: JSON

Parameters:

Name	Description	Type
PaymentId	Transaction ID in the 0xProcessing system	Integer
MerchantId	Merchant ID in 0xProcessing system	String
ShopId	Merchant ID in 0xProcessing system	String
Amount	Payment amount in cryptocurrency	Double
AmountUSD	Payment amount in USD equivalent	Double
TotalAmount	Full amount received in the cryptocurrency without fee	Double
TotalAmountUSD	Full amount received in USD equivalent without fee	Double
Currency	Payment currency	String
Email	Payer's e-mail	String
Status	Payment status Possible values are: Success - payment has been executed successfully. Canceled - payment has been cancelled. The amount has been credited to the wallet indicated on the payment form after the payment window is closed (payment window 30-50 min). The amount has not been transferred to the wallet specified in the payment form. Insufficient - payment is underpaid. The time of the payment window has expired and the payment has not been executed completely, in this case the callback will contain AmountUSD and Amount corresponding to the real amount of received funds). If the deposit amount is less than the minimum amount, the payment is assigned the status "Insufficient". You will not be able to confirm the payment data without an additional payment.	String
BillingID	Unique payment identifier in the system from which the payment is made	String
Signature	Checksum to verify the authenticity of the request (to ensure that the request came from 0xProcessing)	String
Insufficient	If "Confirm insufficient" is set in the Merchant settings then after the end of the payment validity period (window), the insufficient payments will be automatically confirmed as successfully made. Or Merchant can confirm it manually in Confirmations menu. You will receive a second callback with Success status and insufficient=true flag, which will transfer information about the (underpaid) amount actually received. You need to process this callback on the payment generation side and change the originally generated payment in accordance with the actual funds received	Boolean
Test	It indicates whether the payment has been marked as a test payment. Test payments are not intended for real funds turnover and are not displayed in the merchant account. Do not credit funds on callbacks with the parameter test=true	Boolean
ClientId	Unique client ID in your system	String
TxHashes	Successful transaction hash	String []

If you want to know how to test callbacks? please follow the link

Signature check:

1. A string of the following form must be generated: "PaymentId":"MerchantID":"Email":"Currency":"Password" (WebhookURL link password)

Without quotation marks through a colon. Example: 12345:Qtfxhgy43:[e-mail]:USDT (ERC20):qwerty

2. Encrypt the resulting string using the MD5 algorithm

https://emn178.github.io/online-tools/md5.html

3. Compare the resulting string with the one that came through Webhook

"Signature":"a5510c8c3e657ffd8229813749cd20ec"

4. If the strings are the same, return HTTP Status 200 (Required). Our server expects a response to the webhook within a 3-second timeout period. If the response is not received within these 3 seconds, the system considers the delivery failed.

If the callback is not delivered successfully, the system repeats at 31 times with an interval of 15 seconds. If the webhook still fails to be delivered, the system sends a notification to the merchant's account email indicating a problem with the WebhookURL.

Example Webhook JSON:

                        {
                        "PaymentId":10453,
                        "MerchantId":"Asv0232SSd",
                        "Amount":0.00264765,
                        "TotalAmount":0.00264765,
                        "Currency":"BTC",
                        "Email":"[e-mail]",
                        "Status":"Success",
                        "Signature":"a5510c8c3e657ffd8229813749cd20ec",
                        "BillingID":"13304",
                        "AmountUSD":115.0,
                        "TotalAmountUSD":115.0,
                        "Insufficient":false,
                        "Test":false,
                        "ClientId": "1000",
                        "TxHashes":["0e61e33a0c02204c41ac210c2fcffda4bea4399792acc49479aa8374465ef63a"]
                        }

When processing callbacks, you MUST use the PaymentId parameter from the callback 0xProcessing as an additional validation factor.