What exact format is required for WixPayBackend.createPayment to accept amount as a BigDecimal?

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Question:
I’m encountering an error with WixPayBackend.createPayment when trying to pass an amount to create a payment. The error message indicates that the amount cannot be interpreted as a BigDecimal, and I’m not sure of the exact format expected for this field.

The full error message is:
WixPayBackend.createPayment: Could not decode [{ “currency” : “EUR”, “amount” : 5.75 }] at [.amount] as [BigDecimal].

Product:
Wix Editor with the Wix Pay API in Velo (Backend).

What are you trying to achieve:
I’m trying to create a payment from the backend using a specific amount retrieved from a database (Wix collection). The goal is to generate a payment link that I can send to users.

What have you already tried:
Here are the different approaches I’ve tried so far for the amount field in the paymentInfo object:

  1. Passing the amount as a decimal number (float) with a value like 5.75. This gives the BigDecimal error.
  2. Passing the amount as a string with two decimal places ("5.75") to ensure the format is correct. The error persists.
  3. Converting the amount to cents (an integer) by passing a value like 575 to represent 5.75 €. Still, the same error.
  4. Using toFixed(2) to ensure the amount has exactly two decimal places.

Additional information:

  • The amount field in my database is set as a number.
  • This issue is being tested in production mode, with the currency set to EUR.
  • I’ve consulted the wix-pay-backend documentation and tried formatting the amount in various ways.
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Interesting, have you tried parsing it to a simple number type?