This folder contains some useful resources, including some simple pre-built Plutus scripts and example sources, including for the HelloWorld and AlwaysSucceeds scripts.
It also includes a sub-directory for Community contributions.
The sources need to be built with GHC 8.10.4 (8.10.5 may also work), e.g.
cabal build all -w ghc-8.10.4
You may also need to install libsodium as described here, and update cabal.project.local to include:
package cardano-crypto-praos
flags: -external-libsodium-vrf
Further examples and scripts can be found in the cardano-node repository:
https://github.com/input-output-hk/cardano-node/tree/master/plutus-example
https://github.com/input-output-hk/cardano-node/tree/master/scripts/plutus
Here are examples of the JSON format that is used to encode datums and redeemers
https://github.com/input-output-hk/cardano-node/tree/master/scripts/plutus/data
And here is documentation of the general metadata format.
https://developers.cardano.org/docs/get-started/cardano-serialization-lib/transaction-metadata/