Conway [12.0.0-alpha.3] - Incorrect Credential in DRep Certificates (reg, dereg, update)

[Ryun1]

Using Conway Alpha Build: @emurgo/cardano-serialization-lib-nodejs@12.0.0-alpha.3
Based on Draft Conway Ledger design CDDL at commit: 1beddd3d9f10d8fcb163b5e83985c4bac6b74be7

Describe the bug

• When creating DrepDeregistration, DrepRegistration, DrepUpdate using .new().
• OR when running .voting_credential() on a DrepDeregistration, DrepRegistration or DrepUpdate.
• The parameter voting_credential is expected to be of type StakeCredential.
• This is incorrect, these certificates do not require a stake credential, see ledger design here.

Expected behaviour

• Rather these certificates should be taking a "DrepCredential" instead, see CDDL, I believe this should be its own new type of Credential.
• The naming of voting_credential is also outdated to match an older CDDL design and the latest naming is drep_credential.

[lisicky]

Hi @Ryun1 ! We will name it as Credential. StakeCredential is old legacy name and the new Credential will be a new name for StakeCredential because we use it as a common type.

[lisicky]

StakeCredential was renamed to Credential in 12.0.0-alpha.4