Help / suggestions request on hashing (cryptography)

Hello again,

I am in the process of building a cryptocurrency trading agent. I have posted some stuff about this before (see here : Marc Goossens - Revolut6).

I have received some criticism about the use of Python script nodes to ‘talk’ to the API.

I would like to have a go at replacing these by KNIME nodes.

But the API insists the messages I send to it are signed by the Ed25519 standard.

I have asked K-AI for help and this is wat it tells me:

KNIME does not have a native node for calculating cryptographic hashes or digital signatures (such as Ed25519) directly. For your use case (Ed25519 signing and base64 encoding), you should use a Python Script node, as this functionality is not available in standard KNIME nodes. …

Does anyone have any brilliant ideas ?

One thing that occurs to me is to ‘build’ a new Node for this, but this is far out of my comfort zone - and my workflow ‘as is’ with the Python nodes does the job.

Thanks.