Crypto operations in JavaScript functions within platform instruction limits

[vamshiaruru]

Here's my usecase, each of my users have certain number of credits that are automatically applied as discounts during checkout flow if certain conditions are met. Since I can't fetch how many credits a user has from the function (since no api calls can be made), I was thinking I could put that data beforehand as a cart attribute in an encrypted format, decrypt it in my function and apply that as an order level discount.

But the documentation says 'crypto' is not available in functions. So, I am not quite sure how to decrypt on the function side anymore.

Any help is sincerely appreciated. Thank you.

[nickwesselman]

There are crypto libraries for JavaScript that do not depend on the browser cryptoAPI. However in our testing, this will quickly hit the platform instruction count limit. This is a known limitation that we would like to resolve, but don't have a short term solution. If this is a hard requirement for you, I'd recommend using Rust.

[vamshiaruru]

thanks for the response! I shall explore rust.

[nickwesselman]

Renamed and moved to general improvements since this affects all APIs

[nboliver-ventureweb]

@nickwesselman Any update on this feature? Our use case is similar: passing encrypted pricing data to a function via line item property.

[nickwesselman]

Not at the moment. Our recommendation at this time would still be to move to Rust, as is our general recommendation for functions which need to scale.

[nboliver-ventureweb]

Thanks, I appreciate the quick reply.