haskell-opentimestamps-client

Haskell implementation of a basic OpenTimestamps client.

Please see the README on Codeberg at https://codeberg.org/photonsphere/haskell-opentimestamps-client#readme

This is a Haskell client for OpenTimestamps, providing a command-line utility to interact with the OpenTimestamps network. It's on Hackage here: haskell-opentimestamps-client. The client program allows users to:

• Info: Display information about a timestamp file.
• Stamp: Create OpenTimestamps for files.
• Prune: Prune a timestamp file.
• Upgrade: Upgrade remote calendar timestamps to be locally verifiable.
• Verify: Verify existing OpenTimestamps files.

The client uses the haskell-opentimestamps library for core OpenTimestamps stuff.

The project has a number of dependencies, including cryptonite for cryptographic operations, http-client for making requests to calendar servers and haskoin-code and bitcoin-rpc to make RPC-calls to a locally running 'blocksonly' pruned Bitcoin node, which is required for Verification.

Also you will need to have a libsecp256k1 package (Debian: libsecp256k1-dev) installed on your Linux distribution (beware: it needs to be < 0.7.x because of deprecated functions in 0.7.x).

To build an executable:

make release

Updating version (development reminder):

• version: #.#.#.# in package.yaml
• run hpack to regenerate the .cabal file
• Add the version to CHANGELOG.md
• Commit the new version.
• git tag -a #.#.#.# to add a git tag
• git push yourorigin #.#.#.# to push the git tag

Work In Progress...

There is also a Haskell library for working with OpenTimestamps. It's on Hackage here: haskell-opentimestamps.