The work conducted:

Implements PolkaX, a blockchain for Hyperledger Cactus consortium management - PolkaX folder

Implements a Polkadot validator for Hyperledger Cactus (this is, a plugin/server that interacts with PolkaX) - app/packages/ledger-plugin/polkadot/validator. The remaining code was made by Cactus’ contributors, and may not be the result of our direct contribution.