# Libraries

> Provide high-level abstractions that combine logic and data to perform necessary business logic functionalities.




## Pages in this section


- [Vault](/dev-tools/affinidi-tdk/dart/libraries/vault.md): Libraries to implement digital identity wallet into your Flutter/Dart applications.


- [Verifiable Data Sharing Protocol](/dev-tools/affinidi-tdk/dart/libraries/vdsp.md): Affinidi TDK - VDSP library facilitates secure, interoperable, verifiable credential exchange between Holders and Verifiers using the DIDComm v2.1 protocol.


- [Verifiable Data Issuance Protocol](/dev-tools/affinidi-tdk/dart/libraries/vdip.md): Affinidi TDK - VDIP library facilitates secure, interoperable, verifiable credential issuance between Issuers and Holders using the DIDComm v2.1 protocol.