That repo contains docs and code snippets related to BANKEX Multi-Asset Plasma implementation.
The implementation that we are going to make is based on More Viable Plasma proposal. Additionally supports it will support deposit, withdraw, transfer and exchange of a wide range of Ethereum tokens standards like ERC20, ERC721, ERC888, etc.. And that is what we actually mean by Multi-asset.
To support that we are going to implement the more sophisticated parent smart contract that will be able to take ownership of different tokens types. Although, Plasma owner can't guarantee that actual token contract is implemented safely and fully correctly. For the end user that means that he or she should check that token he was offered doesn't have a bugs and fraud in implementation by himself.
Each token type that was deposit to plasma smart contract will get a unique id. That id will be used further in the transactions to describe transfer and exchange operations. To implement an exchange operation, we need a single transaction signed by both parties. The protocol that will allow users to share transactions for signatures will be mainly implemented in the plasma client.
All the research we do, we going to document in the form of Yellow Paper. At the moment we have following separate docs that cover different parts of our application: