euler-staking

This repo contains the staking smart contracts based on Synthetix to be used on Euler.

Setup

yarn

Testing

npx hardhat test

Contract modifications:

1. Solidity compiler set to ^0.8.0 which required some syntactic changes
2. Got rid of SafeMath and SafeDecimalMath libraries throughout the smart contracts
3. In RewardsDistribution.sol got rid of RewardEscrow and FeePoolProxy references along with related functionalities. Modified contract to enforce success on every notifyRewardAmount() call (it means that each staking contract must implement RewardsDistributionRecipient.sol)
4. In StakingRewards.sol used own safe transfer functions instead of keeping OpenZeppelin dependencies. rewardsToken and stakingToken variables have been changed to immutables. notifyRewardAmount() has been modified so that it's not possible to to add more rewards before current staking period is over (prevents from calling the function multiple times and draining RewardsDistribution contract)
5. In IRewardsDistribution.sol and IStakingRewards.sol removed unnecessary view functions for public variables
6. Added Euler sub-accounts support. For that functions stake(), withdraw() and exit() functions of StakingRewards.sol were overloaded