cardano-foundation/dab

Decentralized applicaton backend for Cardano.

dab's Issues

Investigate feasibility of `plutus-chain-index-ogmios` and `plutus-chain-index-dbsync`

• plutus-chain-index-dbsync should be doable, since cardano-db-sync already stores most of the transaction related data. Similar to plutus-chain-index-blockfrost from #2 but using dbsync directly instead going thru API.
• plutus-chain-index-ogmios should be able to handle all the queries as well, using Websocket API which needs to be adapted to freer-simple effect.

Blockfrost backed `plutus-chain-index`

Create plutus-chain-index-blockfrost package implementing plutus-chain-index API.

Currently, when runing Plutus PAB one has to fully sync a chain via plutus-chain-index for PAB to be able to handle contract requests like utxo at address, specific transaction or chain tip queries. With the proposed package, the queries can be handled by Blockfrost API via thin layer converting from Blockfrost responses to plutus-chain-index API ones.

As a proof of concept, FromHashAPI part was implemented and tested to give the same results as original implementation.

Due to different handling of response pagination for utxoAt queries, Blockfrost API has to be extended to allow pagination using PageQuery instead of limit/offset currently availiable in Blockfrost API.

Parity testing for alternative `plutus-chain-index`es

Be able to run original and alternative implementation side by side and compare responses for predefined queries.

Unit tests requiring fully synced plutus-chain-index and internet access for Blockfrost API (or running Ogmios/DbSync).

Create Code of conduct and Contributing

Create the these both documents, make sure to keep the PR open until the MVP to facilitate the discussion.

Implement transaction extraKeyWitnessess into cardano-db-sync

Store transaction extra key witnesses (aka requiredSigners) in cardano-db-sync.

CI pipeline

Create a complex CI pipeline for the project.

Finish and release `blockfrost-freer-client`

This is a experimental private package similar to blockfrost-client which uses freer-simple instead of mtl. This allows integrating Blockfrost API queries into stacks utilizing freer-simple like Plutus PAB - mainly plutus-chain-index.

Prerequisite for #2.

The package is already available but imposes seemingly redundant LastMemember m, MonadIO m constraint on query functions as it defers its last action (actual Servant query) to IO - ideally this shouldn't be required so we could run a stubbed variant for testing without any IO. Fortunately even in its current state this requires very little changes to plutus-chain-index-like handlers so this point is more of nice to have thing.