#ipldm

The ipldm library provides methods for working with the IPLD data model (DM) for Haskell.

Currently, the project has the following features:

• Representing DM nodes of some kind including CIDs provided by the mfmts package.
• Type-class interfaces for encoding and decoding the DM using Alternative.
• A type-class for pairing DM encoders and decoders into a codec, providing default implementations for common operations and a mapping function inspired by profunctors' dimap.
• Implements codec for DAG-CBOR with encoder/decoder instances that work with CBOR encoded bytestrings and provides exceptions for formatting errors and extra IPLD constraints.

#Development

This project is part of ipfshs; unit tests are provided on the main page and bugs can be reported on its ticket tracker. Patches and pull requests can be submitted with git send-email. To build and test this project against all of ipfshs read this section on setting up an ipfshs development environment.

This project can also be built as a standalone library with cabal.

$ git clone https://git.sr.ht/~z0/ipldm
$ cd ipldm
$ cabal build

#Licensing

The ipldm project and its modules are free software and licensed under the AGPLv3 license. See LICENSE.txt.

Copyright © 2026 Zoey McBride | zoeymcbride@mailbox.org