BIP proposal - Hashed Time-Locked Collateral Contract transactions

I have written up a proposed BIP. It has to do a new cross-chain debt protocol. It is here: https://github.com/AtomicLoans/BIP/blob/master/README.md

This BIP was written up for the Atomic Loans protocol specified here: https://arxiv.org/pdf/1901.05117.pdf

Any feedback would be appreciated. Please let me know what the steps are with regards to getting a BIP number assigned or any other process steps required.

Regards, Matthew