feat: automated rKP3R reward distribution

[wei3erHase]

Fixed Forex Reward Distribution Job

GaugeProxy contract extracted from https://etherscan.io/address/0x81a8CAb6bb568fC94bCa70C9AdbFCF05592dEd7b

GaugeProxyV2 Changelog

• Updated min solidity compiler to 0.8.12
• Created corresponding interfaces
• Added natspec to IGaugeProxy
• Added variable and setter for a keeper
• Changed access control on distribute() from gov to keeper
• Addded forceDistribute() allowed for gov
• Added gov parameter in constructor
• Executes infinite KP3R approval to rKP3R contract on constructor

  constructor(address _gov) {
    gov = _gov;
    _safeApprove(_kp3rV1, _rkp3r, type(uint256).max);
  }

• Automates KP3R and rKP3R handling into the distribution function

function _distribute() internal {
    uint256 _balance = IKeep3rV1Proxy(_kp3rV1Proxy).draw();
    IrKP3R(_rkp3r).deposit(_balance);
    ...

Registry

Keep3r Governance: 0x0d5dc686d0a2abbfdafdfb4d0533e886517d4e83
GaugeProxyV2: 0xEdA0b82211Bb7e6E7F0415713580ce91A3C41767
RewardDistributionJob: TDB

Gauge Proxy Deployment

• Defi Wonderland deploys GaugeProxyV2 (with 0x0d5dc686d0a2abbfdafdfb4d0533e886517d4e83 as gov)

Initialization

• Keep3r Governance adds a reward on Keep3rV1Proxy for the GaugeProxyV2 address Keep3rV1Proxy.addRecipient( GaugeProxyV2.address, WEEKLY_AMOUNT_OF_KP3R )
• Keep3r Governance registers existing gauges into the contract GaugeProxyV2.addGauge( _pool, _gauge )
• Keep3r Governance sets contract address as reward_distributor in Curve for the corresponding gauges
• Keep3r Governance executes first reward distribution using forceDistribute(), initializing the draw mechanism on Keep3rV1Proxy, next distribution will be possible a week after execution timestamp

Upkeep

• Defi Wonderland deploys RewardDistributionJob (with 0x0d5dc686d0a2abbfdafdfb4d0533e886517d4e83 as gov)
• Defi Wonderland publishes CLI for job upkeeping
• Keep3r Governance registers job Keep3rV2.addJob(RewardDistributionJob)
• Keep3r Governance force liquidity credits on the job / funds the job with kLPs
• Keep3r Governance registers RewardDistributionJob as keeper address GaugeProxyV2.setKeeper(RewardDistributionJob)