Purpose

We want to give some utility to the G$ token as a “savings” account. Members that save G$s will get fixed APY rewards on top of the GOOD token rewards as existing today in the GovernanceStaking contract.

V2 would reinvest locked G$ in DEFI protocols, initially voltage swap.

High Level Description

The staking contract will use the standard contract staking rewards calculations where the rewards are calculated per block by: blockPassedSinceLastReward * InterestRatePerBlock * totalStaked.

When staking user can specify a donationRatio (a number between 0-100) representing how much of the rewards he is waiving and donating back to the DAO.

When user withdraw his stake or claim his rewards, the contract request G$s from another contract “GoodDollarMintBurnWrapper”

GoodDollarMintBurnWrapper would either allocate its balance or mint new G$s.

The minting of new G$s on sidechains will require the respective mainnet bridge locked G$ tokens to be updated. This will happen asynchronously via a mechanism TBD elsewhere. It could be that for a while not all G$ tokens on sidechain can not be redeemed on mainnet.

The G$ staking contract will have a guardian (a community multisig) that can manage some of its settings to adapt to market needs.

GoodDollarStaking - Contract Specs

• use initial code from GovernanceStaking
• contract should implement the StakingRewardsFixedAPY contract

The following functions should be modified to also perform:

• stake(uint256 _amount, donationRatio)
  • should calculate G$ rewards for passed blocks
  • should update user G$ rewards record with increased stake and donationRatio(call _stake in StakingRewardsFixedAPY)
• withdrawStake(uint256 _amount)
  • should calculate G$ rewards for passed blocks
  • call _mintGDRewards if withdrawing from the rewards part of the principle
• _mintGDRewards*()*
  • should get user pending G$ rewards
  • should mint user his G$ rewards by calling GoodDollarMintBurnWrapper
    • should get actual rewards minted as it might not equal the requested amount to mint
  • should update user G$ rewards record with decreased stake and actual distributed rewards
  • should update global rewards statistics
• withdrawRewards()
  • should calculate rewards for passed blocks
  • should get user G$ rewards amount out of his principle
  • should call _mintGDRewards
• _transfer(address from, address to, uint256 value)
  • should update to/from records with increased/decreased stake
  • should mint rewards for to/from (_mintAPYRewards)