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LendVaultToMidnightCallback

Git Source - Generated with forge doc

Inherits: ILendVaultToMidnightCallback

Title: LendVaultToMidnightCallback

Callback that redeems ERC-4626 vault shares to fund a lender's BUY offer on the target Midnight market when it is taken.

Withdraws buyerAssets + fee from the vault, transfers the fee to the recipient, and approves Morpho Midnight to pull buyerAssets.

The lender must approve this contract for vault shares. VAULT SAFETY REQUIREMENTS

List of assumptions on the source vault that guarantee this callback behaves as expected:

  • Its share price must not move adversely between offer creation and fill: the withdrawal burns whatever shares the vault's rate dictates at fill time, with no maximum-shares bound. The vault must be resistant to atomic share-price manipulation (e.g. sandwiched via donation).
  • It must have immediate exit liquidity for buyerAssets + fee, otherwise withdraw reverts and the fill fails.
  • Its shares should carry high decimals (e.g. 18 via a virtual-shares offset) so per-fill rounding is negligible; shares that match a low-decimal underlying let dust-sized fills socialize per-fill rounding loss to other depositors over many takes (takeUnits has no minimum).
  • It must not re-enter Midnight nor this callback on withdraw.

Constants​

MORPHO_MIDNIGHT​

IMidnight public immutable MORPHO_MIDNIGHT

Functions​

constructor​

constructor(address morphoMidnight) ;

onBuy​

function onBuy(
    bytes32 marketId,
    Market memory market,
    uint256 buyerAssets,
    uint256 units,
    uint256, /* pendingFeeIncrease */
    address buyer,
    bytes memory data
) external override returns (bytes32);