YearnDAIStrategy

Overview

The YearnDAIStrategy contract is a strategy that supplies DAI into a Yearn V2 Vault to earn yield. It handles conversions between the underlying asset and DAI through Curve's 3pool.

Constants

ICurveTriPool public constant triPool = ICurveTriPool(CURVE_3POOL_POOL_MAINNET);  // Curve's 3pool
address constant dai = DAI_MAINNET;                                                // DAI token address

Functions

Initialization Functions

initialize

function initialize(
    IMaxApyVault _vault,
    address[] calldata _keepers,
    bytes32 _strategyName,
    address _strategist,
    IYVault _yVault
) public virtual 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 V2 vault address

Internal Core Functions

_invest

function _invest(uint256 amount, uint256 minOutputAfterInvestment) internal override returns (uint256 depositedAmount)

Invests assets by:

1. Swapping underlying to DAI through Curve

2. Depositing DAI into Yearn vault

Parameters:

• amount: Amount to invest

• minOutputAfterInvestment: Minimum expected shares

Returns:

• depositedAmount: Amount of tokens received

_divest

function _divest(uint256 shares) internal override returns (uint256 withdrawn)

Withdraws assets by:

1. Withdrawing DAI from Yearn vault

2. Swapping DAI to underlying through Curve

Parameters:

• shares: Amount of shares to withdraw

Returns:

• withdrawn: Amount of assets received

Internal View Functions

_shareValue

function _shareValue(uint256 shares) internal view override returns (uint256)

Calculates underlying value of shares including Curve conversion rate.

Parameters:

• shares: Share amount

Returns:

• Underlying value

_sharesForAmount

function _sharesForAmount(uint256 amount) internal view override returns (uint256 shares)

Calculates shares needed for amount including Curve conversion rate.

Parameters:

• amount: Asset amount

Returns:

• Required shares

Key Features:

• Uses Curve's 3pool for token conversions

• Sets 1M DAI maximum trade size

• Sets minimum trade size to 0.01 token units

• Handles token conversions during deposits and withdrawals