The problem Fhenix-matrix solves

Private orderbooks have a few interesting features:

• Private history of trades (visible only to user that completed trades)
• Private balances of encrypted ERC20 tokens (base & trade tokens)
• Absence of slippage thus impermanent loss
• Absence of MEV

Challenges I ran into

I had some issues converting pure Solidity code into FHE-specific code, specially with coding paradigms I was accostumed to (if-else vs FHE.select, data-leaking, etc). Support from Fhenix mentors was very helpful for tackling this.