Metadata and attributes

When notarizing an asset you can add metadata to the transaction in the form of attributes.

To one custom attribute:

$ vcn n artifact --attr "key=value"

You can add as many attributes as needed in one transaction:

$ vcn n artifact --attr "key=value" --attr "key2=value2"

These metadata attributes can be searched for in Trustcenter using the metadata keyword described in chapter Query a ledger.

In practice metadata attributes could hold many useful information about the software artifact:

• build version,
• build pipeline,
• location,
• commit data,
• PGP Signature,
• data on approval process,
• supplier,
• flag if the software is internal or external,
• ID of employees involved,
• test coverage,
• environment,
• release data,
• production status
• and many more.