Fuse Flywheel

The Fuse-specific compatibility modules to add flywheel v2 to the existing Fuse comptroller.

The FuseFlywheelCore is just a wrapper around FlywheelCore with all transfer hooks and identifiers overloaded for backward compatibility.

Adding Flywheel to Fuse

1. Deploy FuseFlywheelCore and configure with desired rewardToken, rewards and booster modules. If the rewards and booster need to reference core, set to 0 initially on core. After deploying, use the setter functions to re-point core to them.
2. Add the flywheel by calling comptroller._addRewardsDistributor(flywheelCore) on the Fuse pool Comptroller.
3. Ensure that the desired markets are added on the flywheel core by calling strategy.addStrategyForRewards(market)
4. Make sure the rewards module is configured and seeded with rewardToken if needed.

Using the optional plugin rewards modules

Plugin rewards modules pass incentives through from Fuse strategies or other sources back to depositors via flywheel. A great example is the Convex Fuse Pool

If the rewards are sent straight to depositors, for example by merkle drop, use the CERC20RewardsDelegate to approve the flywheelRewards module for each rewardToken

If the rewards come from an ERC-4626 plugin strategy, use the CERC20PluginRewardsDelegate to approve the flywheelRewards module for each rewardToken. This should be upgraded from a CERC20PluginDelegate.

Because approvals are cumulative and remain active on the proxy until used, this process can be repeated by applying iterative _becomeImplementation calls on the same RewardsDelegate to add support for multiple flywheels and reward tokens.

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