@unumid/types

UnumID Types

This project contains all of our shared, generic Typescript types that are used through out the UnumID ecosystem.

It as well has shared runtypes which allows for functionality like graceful runtime string literal type checking. To support runtypes we had to use a index.ts instead of just a type declaration index.d.ts file. This also means that a build step is necessary in order for changes to index.ts to be realized.

Conventions

Protocol Buffers

Ideally all types core to UnumID ought to be defined in the protobufs repo and imported into this project. That migration is an ongoing effort. While we migrate to using all Protocol Buffer defined objects and gRPC, we are still using JSON and HTTP for the transport layer. As such attributes defined in protos that go over the network are serialized to JSON which can cause some typing side effects at run time. An example of this is are Date attributes.

For this reason we have adopted a convention of extending the proto defined interface here to make the Date attributes strings. One such example is of the EncryptedCredentialDto defined in index.ts which extends the proto defined interface, EncryptedCredential. Note the use of the Omit function. Reference material can be found here

Naming

a) Generic types such as PresentationRequest, as defined here, ought to be the simplest naming conventions. The generic type represents the domain type definition. If the object is used for persistence this generic type includes the persisted metadata, i.e. uuid, createdAt, and updatedAt.

b) For generic types that are not directly persisted, i.e. CredentialRequest, the naming convention also ought to be the simplest.

c) For generic types that represent an object consisting of options for creating a persisted entity they should have succeeding Options naming convention. For example, IssueCredentialOptions or EncryptedCredentialOptions.

d) Types explicitly for HTTP interfaces ought have a trailing Dto, i.e. PresentationRequestDto. This is often used to better represent for the JSON serialized attributes createdAt and updatedAt from Date to string. Furthermore, if the Data Transfer Object is different between the HTTP request verbs, i.e. GET and POST, then include in the type as such, PresentationRequestPostDto.

e) HTTP types that encompass other DTOs, that are not just a serialization of one object, should use the naming convention "EnrichedDto". For example the PresentationRequestEnrichedDto encompasses the PresentationRequestDto type along with other fields supplementary to the PresentationRequestDto type.

f) Types that are used for cryptographic purposes should have a unsigned and signed version. However, the signed type should have the simpler naming convention, i.e. Credential is the signed type of UnsignedCredential.

Note: any types that undergo cryptographic operations need to be defined via Protocol Buffers in order to leverage their deterministic byte array properties. Thus should not be defined solely in this ts types project.

g) Entity types belong in the projects that interface with their data layers. For example, the PresentationRequest entity type, PresentationRequestEntity, should not be defined generically, but rather in the SaaS project types.

Documentation

Detailed documentation generated from source can be found here which is served by this repo's Github Pages configuration. It is setup to server via the /docs folder of the main branch.

In order to generate the documentation from the source code run the createTypedocs.sh script. However, note that this is now handled automatically by the release CI job.

Release

Releases are handled programmatically via Github Actions CI. Simply push a tag with a preceding 'v' followed by the semver version of the release, i.e. v3.4.3. The CI job will then handle updating the package version, creating new typedocs, creating a Github release, and publishing the package to NPM and Github Packages.