# YearnAjnaDAIStakingStrategy ## Overview The YearnAjnaDAIStakingStrategy contract is a strategy that supplies DAI into a Yearn V3 Vault and stakes the vault shares to earn additional AJNA rewards. It manages token conversions through Curve's 3pool and Uniswap V3. ## Constants ```solidity address public constant ajna = AJNA_MAINNET; // AJNA token address address public constant weth = WETH_MAINNET; // WETH token address address public constant dai = DAI_MAINNET; // DAI token address IRouter public constant router = IRouter(UNISWAP_V3_ROUTER_MAINNET); // Uniswap V3 router ICurveTriPool public constant triPool = ICurveTriPool(CURVE_3POOL_POOL_MAINNET); // Curve 3pool IStakingRewardsMulti public constant yearnStakingRewards = // Yearn staking rewards IStakingRewardsMulti(0x54C6b2b293297e65b1d163C3E8dbc45338bfE443); ``` ## State Variables ```solidity uint256 public minSwapAjna; // Minimum amount of AJNA to swap ``` ## Functions ### Constructor ```solidity constructor() initializer ``` Empty constructor marked as initializer. ### Initialization Functions #### initialize ```solidity function initialize( IMaxApyVault _vault, address[] calldata _keepers, bytes32 _strategyName, address _strategist, IYVaultV3 _yVault ) public override initializer ``` Initializes the strategy with required components. Parameters: * `_vault`: MaxApy vault address * `_keepers`: Array of keeper addresses * `_strategyName`: Name of the strategy * `_strategist`: Strategist address * `_yVault`: Yearn V3 vault address ### Core Functions #### liquidateExact ```solidity function liquidateExact(uint256 amountNeeded) external override checkRoles(VAULT_ROLE) returns (uint256 loss) ``` Withdraws exact amount to vault and re-stakes any remaining shares. Parameters: * `amountNeeded`: Amount to withdraw Returns: * `loss`: Amount of realized loss #### maxLiquidateExact ```solidity function maxLiquidateExact() public view virtual override returns (uint256) ``` Returns maximum withdrawable amount before losses. Returns: * Maximum withdrawable amount ### Internal Core Functions #### \_beforePrepareReturn ```solidity function _beforePrepareReturn() internal override ``` Claims and processes staking rewards before preparing return. #### \_invest ```solidity function _invest(uint256 amount, uint256 minOutputAfterInvestment) internal override returns (uint256 depositedAmount) ``` Invests assets by swapping to DAI and staking in Yearn. Parameters: * `amount`: Amount to invest * `minOutputAfterInvestment`: Minimum expected shares Returns: * `depositedAmount`: Amount of tokens received #### \_divest ```solidity function _divest(uint256 shares) internal override returns (uint256 withdrawn) ``` Unstakes and withdraws assets, converting back to underlying. Parameters: * `shares`: Amount of shares to withdraw Returns: * `withdrawn`: Amount of assets received #### \_liquidatePosition ```solidity function _liquidatePosition(uint256 amountNeeded) internal override returns (uint256 liquidatedAmount, uint256 loss) ``` Liquidates position up to requested amount. Parameters: * `amountNeeded`: Amount to liquidate Returns: * `liquidatedAmount`: Amount actually liquidated * `loss`: Amount of losses incurred #### \_liquidateAllPositions ```solidity function _liquidateAllPositions() internal override returns (uint256 amountFreed) ``` Liquidates all positions during emergency exit. Returns: * `amountFreed`: Amount freed #### \_unwindRewards ```solidity function _unwindRewards(IStakingRewardsMulti _yearnStakingRewards) internal ``` Claims AJNA rewards and converts them to underlying. Parameters: * `_yearnStakingRewards`: Staking rewards contract ### Internal View Functions #### \_ajnaBalance ```solidity function _ajnaBalance() internal view returns (uint256) ``` Returns strategy's AJNA token balance. Returns: * Current AJNA balance #### \_shareBalance ```solidity function _shareBalance() internal view override returns (uint256 _balance) ``` Returns strategy's staked vault share balance. Returns: * Current staked share balance #### \_shareValue ```solidity function _shareValue(uint256 shares) internal view override returns (uint256) ``` Calculates underlying value of shares including conversion rates. Parameters: * `shares`: Share amount Returns: * Underlying value #### \_sharesForAmount ```solidity function _sharesForAmount(uint256 amount) internal view override returns (uint256 shares) ``` Calculates shares needed for amount including conversion rates. 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