Rewarding long deposits in the mixer

[drewstone]

For context: https://tornado-cash.medium.com/tornado-cash-governance-proposal-a55c5c7d0703

Overview

We want to reward users for locking their deposits up for long periods of time. How to handle this is worth discussing. Currently we use a very simple scheme found here: https://github.com/edgeware-builders/anon/pull/38/files#diff-a555fa3cc2f671f4e54a0023d62a75ff045b9fc6762648c55a2c310af03ec719R111

Open Questions

• What function to use for rewards?
• How much should each mixer be rewarded?