Payment Terminal

Payment Terminal is a separate service which can help you to display your deposit address as a web page or embed it into your website as an i-frame.

As a merchant you need to generate a GET URL with a set of the established parameters according to the requirements below and redirect a user via that link to Payment Terminal. Data available for the user includes address and QR-code, currency and deposit amount (in case ‘amount’ parameter was sent).An example of implementation of Payment Terminal with i-frame

An example of implementation of Payment Terminal with i-frame

An example of implementation of Payment Terminal without i-frame

Once the user makes a deposit, it will be processed according to common deposit flow.

Payment terminal workflow representation

Creating a request

You need to create a request which contains hash with two required parameters: data and signature.

The request address:

https://terminal.wllxpay.io/?'data and signature'

Data parameter generation

You need to form JSON with the following parameters​

Example:

{
    "client_id":1 ,
    "url_back":"https:\/\/wallexpay.io\/?1588146480",
    "amount":0.0005,
    "foreign_id":"15881464801588146480",
    "currency":"BTC",
    "convert_to":"EUR"
}

You need to convert the resulting represented code in JSON to base64 format.

Example:

eyJhZGRpdGlvbmFsX3BhcmFtZXRlcnMiOnsiY2xpZW50X2lkIjoxfSwidXJsX2JhY2siOiJodHRwczpcL1wvY29pbnNwYWlkLmNvbVwvPzE1ODgxNDY0ODAiLCJhbW91bnQiOjAuMDAwNSwiZm9yZWlnbl9pZCI6IjE1ODgxNDY0ODAxNTg4MTQ2NDgwIiwiY3VycmVuY3kiOiJCVEMiLCJjb252ZXJ0X3RvIjoiRVVSIn0=

Signature parameter generation

You need to:

• concatenate JSON with secret key to generate signature

Example:

{
    "pay_method":"method_x",
    "user":"user1",
    "amount":32.44,
    "currency":"USD"
}
ObPvxgtazKCkQ7ifz3qzocbv9TVXeB1LUIbCsYk2WUt5agvyt1n1MhQnnCBlcwhY

• The calculated hmac(sha512) hash in lowercase looks like:

Example:

9e4c091dbcc9e2eca21e2e3bd6300ebec225dd0d80f4c309da9ace88000bf6da804262c1415a0b956d1d9411e05f55a547b234ce86338bc55ba58c9962ca0dad

As a result, the request will have the following look:

GET https://terminal.wallexpay.io/?data=eyJjbGllbnRfaWQiOjEsImN1cnJlbmN5IjoiQlRDIiwiZm9yZWlnbl9pZCI6MTU4OTI2ODI1N30=&signature=9e4c091dbcc9e2eca21e2e3bd6300ebec225dd0d80f4c309da9ace88000bf6da804262c1415a0b956d1d9411e05f55a547b234ce86338bc55ba58c9962ca0dad