I would like to notarize some data (like document signatures for example) of less than 500KB on the blockchain and for that I thought to use the Metadata field of a transaction.

So I have 2 questions:

  1. Is this a good (or at least acceptable) use of this field?
  2. Is it better to do it on Cardano directly or wait for the release of an L2 like Hydra?

Thank you.

1 Answer 1


Currently, transactions on Cardano are limited to a maximum of 16k so you probably wouldn't want to store the document directly onto the blockchain. That said, you might want to consider storing the document onto something like an IPFS and then referencing the signed document from the metadata.

As for waiting for Hydra, while Hydra may change the fees and throughput associated with the transaction, I imagine the solution would be the same.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.