Defi Lending Concepts 2

bite.sol

pragma solidity ^0.8.13;

function bite(bytes32 ilk, address urn) external returns (uint id) {
    (, uint rate, uint spot) = vat.ilks(ilk);
    (uint ink, uint art) = vat.urns(ilk, urn);

    require(live == 1, "Cat/not-live");
    require(spot > 0 && mul(ink, spot) < mul(art, rate), "Cat/not-unsafe");