Web App Payment

Web App Payment

By opening a Secure Altalix URL your user can use the Altalix Web App in order to make a payment. Below are the details to generate this URL


Usually you'd want to show the Rate before the user creates a payment

Creating a Signed Altalix URL

You will need both your Partner ID, Signing Key & API Key for this process so please re-visit Authentication if you don't have these.

There are 3 components to forming the URL:

  1. Base URL - this is fixed e.g. https://app.altalix.com/partners/transaction-create
  2. Payload - this is encoded JSON including details for the payment
  3. Signature - this is the signed payload

Below is a simplified example in Ruby of how to create these URL's - if you're having issues with this step - drop us a message with the language and framework you're using and we are be happy to help.

@signing_key = OpenSSL::PKey::RSA.new File.read 'rsa.pem'
@signing_key_id = "<uuid-found-in-partner-portal>"
@partner_id = "<uuid-provided-at-registration>"
def generate_signed_url()
# JSON Payload Data - here it's fixed but this needs to be data
# provided from the user.
json = {
sell_currency: "EUR",
buy_currency: "ETH",
sell_amount: 10,
address: "<user-ether-address>",
partner_id: @partner_id,
key_id: @signing_key_id,
created_at: DateTime.now,
# Signature of payload
signature = @signing_key.sign(
# Base64 encode and CGI escape for use in URL
encoded_signature = CGI.escape(Base64.encode64("#{signature}"))
payload = CGI.escape(Base64.encode64("#{json}"))

Opening a Secure Altalix URL

This is down to the implementation but here's a few common scenarios:

  • Web app - creating a link using <a href="<SIGNED-URL-HERE>" target="_blank">Continue</a>
  • React Native: In App Browser