How do I calculate the fingerprint of an asset?

Question

If I have an asset with

policy id: 2697bec9e609932eaaaafb34c8e1ea706549d268166ef60285026b85

asset name: redomgrun

How do I calculate the fingerprint asset107k0vzcplp8rjc3d2y8cew6z2gdhvnqru2uluu?

Answer 1

As per CIP14: User-Facing Asset Fingerprint, we calculate it as:

assetFingerprint := encodeBech32
  ( datapart = hash
    ( algorithm = 'blake2b'
    , digest-length = 20
    , message = policyId | assetName
    )
  , humanReadablePart = 'asset'
  )

Or you can just use an existing library, such as cip14-js by Emurgo.

Answer 2

A Java implementation will be available in cardano-client-lib next release. (0.2.0)

For now, you can refer to "calculateFingerPrint" method of this class (see here for tests).