Contract 0x1AA108E2392Cd316be9255F78A3673E9f6f65447

Contract Overview

Balance:
0 AVAX
Txn Hash Method
Block
From
To
Value [Txn Fee]
0x26bbc4fd0111419e45d88759088af08e1ea201852b7da094b07721b11868964dChange Oracle72200522022-03-12 20:29:48208 days 10 hrs ago0x9e97ae5d91da840eed47a5b07fdabbc2bfad8ada IN 0x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX0.00106335 25
0xb8d18d2f014da8a2e480d124203a2d7b9ea8b80ce675735ec468587360f2ca55Change Oracle72199582022-03-12 20:26:40208 days 10 hrs ago0x9e97ae5d91da840eed47a5b07fdabbc2bfad8ada IN 0x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX0.00106335 25
0xc56f8cef97b4cd5b4e956764f34158e9d15e88ce776335bc95d2a90492c4b43aAdd Collateral69707952022-03-06 23:52:07214 days 6 hrs ago0x9e97ae5d91da840eed47a5b07fdabbc2bfad8ada IN 0x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX0.009384525 25
0xd0dd667e818a325eba682ac8b2694db7683108ac3186f0e8bfb1321aeef2c5e9Deprecate Collat...69703822022-03-06 23:37:28214 days 7 hrs ago0x9e97ae5d91da840eed47a5b07fdabbc2bfad8ada IN 0x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX0.000991925 25
0xfcd502d1feab3cdce3b871869f07593e83a65b9ffc9c2a53779a50dc4f6fa47fAdd Collateral68433592022-03-03 23:25:20217 days 7 hrs ago0x9e97ae5d91da840eed47a5b07fdabbc2bfad8ada IN 0x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX0.009384525 25
0xb3d8af90196157a124e3d0da80c9787c9268428ffa701ae3bde3c29adb1a2009Change Oracle66026652022-02-26 7:32:52222 days 23 hrs ago0x9e97ae5d91da840eed47a5b07fdabbc2bfad8ada IN 0x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX0.00106335 25
0xf41fabe489c92286b5ea039039cec1917b4f3fad7a61126ff8e74774f06cf3d6Change Oracle66025552022-02-26 7:29:12222 days 23 hrs ago0x9e97ae5d91da840eed47a5b07fdabbc2bfad8ada IN 0x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX0.00106335 25
0xbcd8ad6dbd82cff76cf8a5130f160f0f5cc2367671b0fd25a4e62c3b92f8d4d4Undeprecate Coll...61616792022-02-16 6:53:41232 days 23 hrs ago0x9e97ae5d91da840eed47a5b07fdabbc2bfad8ada IN 0x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX0.000992725 25
0x7eb03838783f9438414a3bc7acfd0a6a5062b4642ebb68749f6532c249c6a605Deprecate Collat...61601962022-02-16 6:03:38233 days 43 mins ago0x9e97ae5d91da840eed47a5b07fdabbc2bfad8ada IN 0x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX0.000991925 25
0xbfba8d8f4eecd1c906528cbb0e6d758167d6157a494d01edeec18970f5ff0011Change Price Cur...61601732022-02-16 6:02:52233 days 44 mins ago0x9e97ae5d91da840eed47a5b07fdabbc2bfad8ada IN 0x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX0.001577625 25
0x40ae89e0d886032a260dafe96f792618a18b7e9bf9498eb2c0e139b797cd5555Add Collateral61582722022-02-16 4:58:29233 days 1 hr ago0x9e97ae5d91da840eed47a5b07fdabbc2bfad8ada IN 0x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX0.055573769209 148.046302848
0x57ce26b399e0548e5930adf6a3c5d3ba2b87ab30a24b1f6b9c5422dedb7cb738Change Price Cur...60758962022-02-14 6:25:38235 days 21 mins ago0x9e97ae5d91da840eed47a5b07fdabbc2bfad8ada IN 0x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX0.001437625 25
0xc5283146a145d5f55e29ca193bf168635e6a854e3164041ee55799aed018fe9bChange Price Cur...60758892022-02-14 6:25:24235 days 21 mins ago0x9e97ae5d91da840eed47a5b07fdabbc2bfad8ada IN 0x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX0.001437325 25
0xbb0a6906b20c1aa6879eb8815e6164d31a8a67fb85d988c4c34130728d37d735Change Price Cur...60758812022-02-14 6:25:08235 days 21 mins ago0x9e97ae5d91da840eed47a5b07fdabbc2bfad8ada IN 0x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX0.001437625 25
0xd489da39d7c532ad9c00f5cf905e57dedbdb5c0d922998055fa2c1d3e8c1b455Change Price Cur...60758742022-02-14 6:24:54235 days 22 mins ago0x9e97ae5d91da840eed47a5b07fdabbc2bfad8ada IN 0x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX0.001437625 25
0xd35bcaff1fd88e88e0f817288dad5b5f5355076fbefaef457fa2ab03a9265aa6Change Price Cur...60758672022-02-14 6:24:40235 days 22 mins ago0x9e97ae5d91da840eed47a5b07fdabbc2bfad8ada IN 0x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX0.001437625 25
0x13738d3d864ea5c112ed6230eec78b7a5757d561a89f836a56342ec4b673a68eChange Price Cur...60758632022-02-14 6:24:27235 days 22 mins ago0x9e97ae5d91da840eed47a5b07fdabbc2bfad8ada IN 0x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX0.0013821 25
0x0803e9ef3a99e983aa3cabab349e03a023877578ed38958cadccd380de2f0992Add Collateral60699072022-02-14 2:58:18235 days 3 hrs ago0x9e97ae5d91da840eed47a5b07fdabbc2bfad8ada IN 0x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX0.009384525 25
0xb655628b09441861f5fe65ff53ae725f46f86cbf337d5482a3098ff3a978c539Add Collateral60698922022-02-14 2:57:46235 days 3 hrs ago0x9e97ae5d91da840eed47a5b07fdabbc2bfad8ada IN 0x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX0.009384225 25
0x05446ba6c8c751484d7de398c78d2c8acf5f62ffca269da43c061218a17d51a6Add Collateral60698762022-02-14 2:57:15235 days 3 hrs ago0x9e97ae5d91da840eed47a5b07fdabbc2bfad8ada IN 0x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX0.009384525 25
0x034864d10ec0dd9ea41aa5bc60a6ac7341aa21e1aa991834b8fe8bdec149767dAdd Collateral60698582022-02-14 2:56:39235 days 3 hrs ago0x9e97ae5d91da840eed47a5b07fdabbc2bfad8ada IN 0x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX0.009384525 25
0xe3d7754cbd0c687419aa926bc55350181294c6f37e4d1cfc9111ee7a89ccb7f1Add Collateral60698502022-02-14 2:56:24235 days 3 hrs ago0x9e97ae5d91da840eed47a5b07fdabbc2bfad8ada IN 0x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX0.009384525 25
0x3f002f24eedf0862b6740476edbd7c36f8919de0e73578599ff04a3d77d7aeecAdd Collateral60698292022-02-14 2:55:42235 days 3 hrs ago0x9e97ae5d91da840eed47a5b07fdabbc2bfad8ada IN 0x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX0.013100325 25
0x61e8b5d7874bedfb3d60da02b57d41990fc306c0c75fed3983cd1979481023aaSet Addresses60673282022-02-14 1:31:41235 days 5 hrs ago0x9e97ae5d91da840eed47a5b07fdabbc2bfad8ada IN 0x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX0.004113065 27.5
0x37e9bd1964d69a72f894428e7db93515af020fce59e7e7fd9fa6e29b140efb010x6080604060665692022-02-14 1:05:46235 days 5 hrs ago0x9e97ae5d91da840eed47a5b07fdabbc2bfad8ada IN  Contract Creation0 AVAX0.09772128 45
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0x24a562615c68bd03e78e952eff0ea68cc1d82eddf6329cfd2eecc10f489f602398863422022-05-19 21:35:58140 days 9 hrs ago 0x9ab04cd8b701e5bb4fdf31378af679d2f4534f8a0x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX
0x24a562615c68bd03e78e952eff0ea68cc1d82eddf6329cfd2eecc10f489f602398863422022-05-19 21:35:58140 days 9 hrs ago 0x9ab04cd8b701e5bb4fdf31378af679d2f4534f8a0x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX
0x24a562615c68bd03e78e952eff0ea68cc1d82eddf6329cfd2eecc10f489f602398863422022-05-19 21:35:58140 days 9 hrs ago 0x9ab04cd8b701e5bb4fdf31378af679d2f4534f8a0x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX
0x24a562615c68bd03e78e952eff0ea68cc1d82eddf6329cfd2eecc10f489f602398863422022-05-19 21:35:58140 days 9 hrs ago 0x9ab04cd8b701e5bb4fdf31378af679d2f4534f8a0x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX
0x24a562615c68bd03e78e952eff0ea68cc1d82eddf6329cfd2eecc10f489f602398863422022-05-19 21:35:58140 days 9 hrs ago 0x9ab04cd8b701e5bb4fdf31378af679d2f4534f8a0x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX
0x24a562615c68bd03e78e952eff0ea68cc1d82eddf6329cfd2eecc10f489f602398863422022-05-19 21:35:58140 days 9 hrs ago 0x9ab04cd8b701e5bb4fdf31378af679d2f4534f8a0x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX
0x24a562615c68bd03e78e952eff0ea68cc1d82eddf6329cfd2eecc10f489f602398863422022-05-19 21:35:58140 days 9 hrs ago 0x9ab04cd8b701e5bb4fdf31378af679d2f4534f8a0x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX
0x24a562615c68bd03e78e952eff0ea68cc1d82eddf6329cfd2eecc10f489f602398863422022-05-19 21:35:58140 days 9 hrs ago 0x9ab04cd8b701e5bb4fdf31378af679d2f4534f8a0x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX
0x24a562615c68bd03e78e952eff0ea68cc1d82eddf6329cfd2eecc10f489f602398863422022-05-19 21:35:58140 days 9 hrs ago 0x9ab04cd8b701e5bb4fdf31378af679d2f4534f8a0x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX
0x24a562615c68bd03e78e952eff0ea68cc1d82eddf6329cfd2eecc10f489f602398863422022-05-19 21:35:58140 days 9 hrs ago 0x9ab04cd8b701e5bb4fdf31378af679d2f4534f8a0x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX
0x24a562615c68bd03e78e952eff0ea68cc1d82eddf6329cfd2eecc10f489f602398863422022-05-19 21:35:58140 days 9 hrs ago 0x9ab04cd8b701e5bb4fdf31378af679d2f4534f8a0x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX
0x24a562615c68bd03e78e952eff0ea68cc1d82eddf6329cfd2eecc10f489f602398863422022-05-19 21:35:58140 days 9 hrs ago 0x9ab04cd8b701e5bb4fdf31378af679d2f4534f8a0x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX
0x24a562615c68bd03e78e952eff0ea68cc1d82eddf6329cfd2eecc10f489f602398863422022-05-19 21:35:58140 days 9 hrs ago 0x9ab04cd8b701e5bb4fdf31378af679d2f4534f8a0x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX
0x24a562615c68bd03e78e952eff0ea68cc1d82eddf6329cfd2eecc10f489f602398863422022-05-19 21:35:58140 days 9 hrs ago 0x9ab04cd8b701e5bb4fdf31378af679d2f4534f8a0x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX
0x24a562615c68bd03e78e952eff0ea68cc1d82eddf6329cfd2eecc10f489f602398863422022-05-19 21:35:58140 days 9 hrs ago 0x9ab04cd8b701e5bb4fdf31378af679d2f4534f8a0x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX
0x24a562615c68bd03e78e952eff0ea68cc1d82eddf6329cfd2eecc10f489f602398863422022-05-19 21:35:58140 days 9 hrs ago 0x9ab04cd8b701e5bb4fdf31378af679d2f4534f8a0x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX
0x24a562615c68bd03e78e952eff0ea68cc1d82eddf6329cfd2eecc10f489f602398863422022-05-19 21:35:58140 days 9 hrs ago 0x9ab04cd8b701e5bb4fdf31378af679d2f4534f8a0x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX
0x2d183f6f5aa2e8183068bdc3c01d30d9721d9ae120fd91beaa0c3ab54133eca698863422022-05-19 21:35:58140 days 9 hrs ago 0x9ab04cd8b701e5bb4fdf31378af679d2f4534f8a0x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX
0x2d183f6f5aa2e8183068bdc3c01d30d9721d9ae120fd91beaa0c3ab54133eca698863422022-05-19 21:35:58140 days 9 hrs ago 0x9ab04cd8b701e5bb4fdf31378af679d2f4534f8a0x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX
0xabcc655e929695f4f8b063b084127abb9ff3ac928a9c4dbe2c0497c2b4bb28e498856372022-05-19 21:12:30140 days 9 hrs ago 0x9ab04cd8b701e5bb4fdf31378af679d2f4534f8a0x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX
0xabcc655e929695f4f8b063b084127abb9ff3ac928a9c4dbe2c0497c2b4bb28e498856372022-05-19 21:12:30140 days 9 hrs ago 0x9ab04cd8b701e5bb4fdf31378af679d2f4534f8a0x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX
0x3c4624cb91fc6f8bae4030590fba93fbe2f5e5b80ad725acb28b79187e03f61596634452022-05-14 7:02:46145 days 23 hrs ago 0x6387c0e385196fecb43d5fe37ebe9777b790a8820x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX
0x3c4624cb91fc6f8bae4030590fba93fbe2f5e5b80ad725acb28b79187e03f61596634452022-05-14 7:02:46145 days 23 hrs ago 0x6387c0e385196fecb43d5fe37ebe9777b790a8820x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX
0x3c4624cb91fc6f8bae4030590fba93fbe2f5e5b80ad725acb28b79187e03f61596634452022-05-14 7:02:46145 days 23 hrs ago 0x6387c0e385196fecb43d5fe37ebe9777b790a8820x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX
0x3c4624cb91fc6f8bae4030590fba93fbe2f5e5b80ad725acb28b79187e03f61596634452022-05-14 7:02:46145 days 23 hrs ago 0x6387c0e385196fecb43d5fe37ebe9777b790a8820x1aa108e2392cd316be9255f78a3673e9f6f654470 AVAX
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Similar Match Source Code
Note: This contract matches the deployed ByteCode of the Source Code for Contract 0x8d0a27BBc7111369340EF5FDdd4891AC48e7679c

Contract Name:
Whitelist

Compiler Version
v0.6.11+commit.5ef660b1

Optimization Enabled:
Yes with 100 runs

Other Settings:
default evmVersion

Contract Source Code (Solidity Standard Json-Input format)

File 1 of 18 : Whitelist.sol
// SPDX-License-Identifier: UNLICENSED

pragma solidity 0.6.11;

import "./Ownable.sol";
import "../Interfaces/IBaseOracle.sol";
import "../Interfaces/IWhitelist.sol";
import "../Interfaces/IPriceFeed.sol";
import "../Interfaces/IPriceCurve.sol";
import "../Interfaces/IActivePool.sol";
import "../Interfaces/IDefaultPool.sol";
import "../Interfaces/IStabilityPool.sol";
import "../Interfaces/ICollSurplusPool.sol";
import "../Interfaces/IERC20.sol";
import "./LiquityMath.sol";
import "./CheckContract.sol";


/**
 * Whitelist is the contract that keeps track of all the assets that the system takes as collateral.
 * It has onlyOwner functions to add or deprecate collaterals from the whitelist, change the price
 * curve, price feed, safety ratio, etc.
 */

contract Whitelist is Ownable, IWhitelist, IBaseOracle, CheckContract {
    using SafeMath for uint256;

    struct CollateralParams {
        // Safety ratio
        uint256 ratio; // 10**18 * the ratio. i.e. ratio = .95 * 10**18 for 95%. More risky collateral has a lower ratio
        address oracle;
        uint256 decimals;
        bool active;
        address priceCurve;
        uint256 index;
        bool isWrapped;
        address defaultRouter;
    }

    IActivePool activePool;
    IDefaultPool defaultPool;
    IStabilityPool stabilityPool;
    ICollSurplusPool collSurplusPool;
    address borrowerOperationsAddress;

    mapping(address => CollateralParams) public collateralParams;

    mapping(address => bool) public validRouter;

    // list of all collateral types in collateralParams (active and deprecated)
    // Addresses for easy access
    address[] public validCollateral; // index maps to token address.

    event CollateralAdded(address _collateral);
    event CollateralDeprecated(address _collateral);
    event CollateralUndeprecated(address _collateral);
    event CollateralRemoved(address _collateral);
    event OracleChanged(address _collateral);
    event PriceCurveChanged(address _collateral);
    event RatioChanged(address _collateral);

    // Require that the collateral exists in the whitelist. If it is not the 0th index, and the
    // index is still 0 then it does not exist in the mapping.
    // no require here for valid collateral 0 index because that means it exists. 
    modifier exists(address _collateral) {
        if (validCollateral.length != 0 && validCollateral[0] != _collateral) {
            require(collateralParams[_collateral].index != 0, "collateral does not exists");
        }
        _;
    }

    // ----------Only Owner Setter Functions----------

    function setAddresses(
        address _activePoolAddress,
        address _defaultPoolAddress,
        address _stabilityPoolAddress,
        address _collSurplusPoolAddress,
        address _borrowerOperationsAddress
    ) external override onlyOwner {
        checkContract(_activePoolAddress);
        checkContract(_defaultPoolAddress);
        checkContract(_stabilityPoolAddress);
        checkContract(_collSurplusPoolAddress);
        checkContract(_borrowerOperationsAddress);

        activePool = IActivePool(_activePoolAddress);
        defaultPool = IDefaultPool(_defaultPoolAddress);
        stabilityPool = IStabilityPool(_stabilityPoolAddress);
        collSurplusPool = ICollSurplusPool(_collSurplusPoolAddress);
        borrowerOperationsAddress = _borrowerOperationsAddress;
    }

    function addCollateral(
        address _collateral,
        uint256 _minRatio,
        address _oracle,
        uint256 _decimals,
        address _priceCurve, 
        bool _isWrapped, 
        address _routerAddress
    ) external onlyOwner {
        checkContract(_collateral);
        checkContract(_oracle);
        checkContract(_priceCurve);
        checkContract(_routerAddress);
        // If collateral list is not 0, and if the 0th index is not equal to this collateral,
        // then if index is 0 that means it is not set yet.
        if (validCollateral.length != 0) {
            require(validCollateral[0] != _collateral && collateralParams[_collateral].index == 0, "collateral already exists");
        }

        validCollateral.push(_collateral);
        collateralParams[_collateral] = CollateralParams(
            _minRatio,
            _oracle,
            _decimals,
            true,
            _priceCurve,
            validCollateral.length - 1, 
            _isWrapped,
            _routerAddress
        );

        activePool.addCollateralType(_collateral);
        defaultPool.addCollateralType(_collateral);
        stabilityPool.addCollateralType(_collateral);
        collSurplusPool.addCollateralType(_collateral);

        // throw event
        emit CollateralAdded(_collateral);
    }

    /**
     * Deprecate collateral by not allowing any more collateral to be added of this type.
     * Still can interact with it via validCollateral and CollateralParams
     */
    function deprecateCollateral(address _collateral) external exists(_collateral) onlyOwner {
        checkContract(_collateral);

        require(collateralParams[_collateral].active, "collateral already deprecated");

        collateralParams[_collateral].active = false;

        // throw event
        emit CollateralDeprecated(_collateral);
    }

    /**
     * Undeprecate collateral by allowing more collateral to be added of this type.
     * Still can interact with it via validCollateral and CollateralParams
     */
    function undeprecateCollateral(address _collateral) external exists(_collateral) onlyOwner {
        checkContract(_collateral);

        require(!collateralParams[_collateral].active, "collateral is already active");

        collateralParams[_collateral].active = true;

        // throw event
        emit CollateralUndeprecated(_collateral);
    }

    /**
     * Function to change oracles
     */
    function changeOracle(address _collateral, address _oracle)
        external
        exists(_collateral)
        onlyOwner
    {
        checkContract(_collateral);
        checkContract(_oracle);
        collateralParams[_collateral].oracle = _oracle;

        // throw event
        emit OracleChanged(_collateral);
    }

    /**
     * Function to change price curve
     */
    function changePriceCurve(address _collateral, address _priceCurve)
        external
        exists(_collateral)
        onlyOwner
    {
        checkContract(_collateral);
        checkContract(_priceCurve);
        uint lastFeePercent;
        uint lastFeeTime; 
        (lastFeePercent, lastFeeTime) = IPriceCurve(collateralParams[_collateral].priceCurve).getFeeCapAndTime();
        IPriceCurve(_priceCurve).setFeeCapAndTime(lastFeePercent, lastFeeTime);
        collateralParams[_collateral].priceCurve = _priceCurve;

        // throw event
        emit PriceCurveChanged(_collateral);
    }

    /**
     * Function to change Safety ratio.
     */
    function changeRatio(address _collateral, uint256 _ratio)
        external
        exists(_collateral)
        onlyOwner
    {
        checkContract(_collateral);
        require(_ratio < 1100000000000000000, "ratio must be less than 1.10 => greater than 1.1 would mean taking out more YUSD than collateral VC");
        require(collateralParams[_collateral].ratio < _ratio, "New SR must be greater than previous SR");
        collateralParams[_collateral].ratio = _ratio;

        // throw event
        emit RatioChanged(_collateral);
    }

    // -----------Routers--------------

    function setDefaultRouter(address _collateral, address _router) external override onlyOwner exists(_collateral) {
        checkContract(_router);
        collateralParams[_collateral].defaultRouter = _router;
    }

    function getDefaultRouterAddress(address _collateral) external view override exists(_collateral) returns (address) {
        return collateralParams[_collateral].defaultRouter;
    }


    // ---------- View Functions -----------


    function isValidRouter(address _router) external override view returns (bool) {
        return validRouter[_router];
    }

    function isWrapped(address _collateral) external view override returns (bool) {
        return collateralParams[_collateral].isWrapped;
    }

    function getValidCollateral() external view override returns (address[] memory) {
        return validCollateral;
    }

    function getRatio(address _collateral)
        public
        view
        override
        exists(_collateral)
        returns (uint256)
    {
        return collateralParams[_collateral].ratio;
    }

    function getOracle(address _collateral)
        external
        view
        override
        exists(_collateral)
        returns (address)
    {
        return collateralParams[_collateral].oracle;
    }

    function getPriceCurve(address _collateral)
        external
        view
        override
        exists(_collateral)
        returns (address)
    {
        return collateralParams[_collateral].priceCurve;
    }

    function getIsActive(address _collateral)
        external
        view
        override
        exists(_collateral)
        returns (bool)
    {
        return collateralParams[_collateral].active;
    }

    function getDecimals(address _collateral)
        external
        view
        override
        exists(_collateral)
        returns (uint256)
    {
        return collateralParams[_collateral].decimals;
    }

    function getIndex(address _collateral)
        public
        view
        override
        exists(_collateral)
        returns (uint256)
    {
        return (collateralParams[_collateral].index);
    }

    // Returned as fee percentage * 10**18. View function for external callers.
    function getFee(
        address _collateral,
        uint256 _collateralVCInput,
        uint256 _collateralVCBalancePost,
        uint256 _totalVCBalancePre,
        uint256 _totalVCBalancePost
    ) external view override exists(_collateral) returns (uint256 fee) {
        IPriceCurve priceCurve = IPriceCurve(collateralParams[_collateral].priceCurve);
        return priceCurve.getFee(_collateralVCInput, _collateralVCBalancePost, _totalVCBalancePre, _totalVCBalancePost);
    }

    // Returned as fee percentage * 10**18. Non view function for just borrower operations to call.
    function getFeeAndUpdate(
        address _collateral,
        uint256 _collateralVCInput,
        uint256 _collateralVCBalancePost,
        uint256 _totalVCBalancePre,
        uint256 _totalVCBalancePost
    ) external override exists(_collateral) returns (uint256 fee) {
        require(
            msg.sender == borrowerOperationsAddress,
            "only borrower operations can call this function"
        );
        IPriceCurve priceCurve = IPriceCurve(collateralParams[_collateral].priceCurve);
        return
            priceCurve.getFeeAndUpdate(
                _collateralVCInput,
                _collateralVCBalancePost,
                _totalVCBalancePre,
                _totalVCBalancePost
            );
    }

    // should return 10**18 times the price in USD of 1 of the given _collateral
    function getPrice(address _collateral)
        public
        view
        override
        exists(_collateral)
        returns (uint256)
    {
        IPriceFeed collateral_priceFeed = IPriceFeed(collateralParams[_collateral].oracle);
        uint256 price = collateral_priceFeed.fetchPrice_v();
        return price;
    }

    // Gets the value of that collateral type, of that amount, in USD terms.
    function getValueUSD(address _collateral, uint256 _amount)
        external
        view
        override
        exists(_collateral)
        returns (uint256)
    {
        uint256 decimals = collateralParams[_collateral].decimals;
        uint256 price = getPrice(_collateral);
        return price.mul(_amount).div(10**decimals);
    }

    // Gets the value of that collateral type, of that amount, in VC terms.
    function getValueVC(address _collateral, uint256 _amount)
        public
        view
        override
        exists(_collateral)
        returns (uint256)
    {
        uint256 price = getPrice(_collateral);
        uint256 decimals = collateralParams[_collateral].decimals;
        uint256 ratio = collateralParams[_collateral].ratio;

        // div by 10**18 for price adjustment
        // and divide by 10 ** decimals for decimal adjustment
        return (price.mul(_amount).mul(ratio).div(10**(18 + decimals)));
    }


}

File 2 of 18 : Ownable.sol
// SPDX-License-Identifier: UNLICENSED

pragma solidity 0.6.11;

/**
 * Based on OpenZeppelin's Ownable contract:
 * https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/access/Ownable.sol
 *
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
contract Ownable {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor () internal {
        _owner = msg.sender;
        emit OwnershipTransferred(address(0), msg.sender);
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(isOwner(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Returns true if the caller is the current owner.
     */
    function isOwner() public view returns (bool) {
        return msg.sender == _owner;
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     *
     * NOTE: This function is not safe, as it doesn’t check owner is calling it.
     * Make sure you check it before calling it.
     */
    function _renounceOwnership() internal {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }
}

File 3 of 18 : IBaseOracle.sol
// SPDX-License-Identifier: UNLICENSED

pragma solidity 0.6.11;

interface IBaseOracle {
  /// @dev Return the value of the given input as USD per unit.
  /// @param token The ERC-20 token to check the value.
  function getPrice(address token) external view returns (uint);

}

File 4 of 18 : IWhitelist.sol
// SPDX-License-Identifier: UNLICENSED

pragma solidity 0.6.11;


interface IWhitelist {
    function getValidCollateral() view external returns (address[] memory);

    function setAddresses(
        address _activePoolAddress,
        address _defaultPoolAddress,
        address _stabilityPoolAddress,
        address _collSurplusPoolAddress, 
        address _borrowerOperationsAddress
    ) external;

    function isValidRouter(address _router) external view returns (bool);
    function getOracle(address _collateral) view external returns (address);
    function getRatio(address _collateral) view external returns (uint256);
    function getIsActive(address _collateral) view external returns (bool);
    function getPriceCurve(address _collateral) external view returns (address);
    function getDecimals(address _collateral) external view returns (uint256);
    function getFee(address _collateral, uint _collateralVCInput, uint256 _collateralVCBalancePost, uint256 _totalVCBalancePre, uint256 _totalVCBalancePost) external view returns (uint256 fee);
    function getFeeAndUpdate(address _collateral, uint _collateralVCInput, uint256 _collateralVCBalancePost, uint256 _totalVCBalancePre, uint256 _totalVCBalancePost) external returns (uint256 fee);
    function getIndex(address _collateral) external view returns (uint256);
    function isWrapped(address _collateral) external view returns (bool);
    function setDefaultRouter(address _collateral, address _router) external;

    function getValueVC(address _collateral, uint _amount) view external returns (uint);
    function getValueUSD(address _collateral, uint _amount) view external returns (uint256);
    function getDefaultRouterAddress(address _collateral) external view returns (address);
}

File 5 of 18 : IPriceFeed.sol
// SPDX-License-Identifier: UNLICENSED

pragma solidity 0.6.11;

interface IPriceFeed {

    // --- Events ---
    event LastGoodPriceUpdated(uint _lastGoodPrice);

    // --- Function ---
    // function fetchPrice() external returns (uint);

    function fetchPrice_v() view external returns (uint);
}

File 6 of 18 : IPriceCurve.sol
// SPDX-License-Identifier: UNLICENSED

pragma solidity 0.6.11;

interface IPriceCurve {
    function setAddresses(address _whitelistAddress) external;

    function setDecayTime(uint _decayTime) external;

    /** 
     * Returns fee based on inputted collateral VC balance and total VC balance of system. 
     * fee is in terms of percentage * 1e18. 
     * If the fee were 1%, this would be 0.01 * 1e18 = 1e16
     */
    function getFee(uint256 _collateralVCInput, uint256 _collateralVCBalancePost, uint256 _totalVCBalancePre, uint256 _totalVCBalancePost) external view returns (uint256 fee);

    // Same function, updates the fee as well. Called only by whitelist. 
    function getFeeAndUpdate(uint256 _collateralVCInput, uint256 _totalCollateralVCBalance, uint256 _totalVCBalancePre, uint256 _totalVCBalancePost) external returns (uint256 fee);

    // Function for setting the old price curve's last fee cap / value to the new fee cap / value. 
    // Called only by whitelist. 
    function setFeeCapAndTime(uint256 _lastFeePercent, uint256 _lastFeeTime) external;

    // Gets the fee cap and time currently. Used for setting new values for next price curve. 
    function getFeeCapAndTime() external view returns (uint256 _lastFeePercent, uint256 _lastFeeTime);

    /** 
     * Returns fee based on decay since last fee calculation, which we take to be 
     * a reasonable fee amount. If it has decayed a certain amount since then, we let
     * the new fee amount slide. 
     */
    function calculateDecayedFee() external view returns (uint256 fee);
}

File 7 of 18 : IActivePool.sol
// SPDX-License-Identifier: UNLICENSED

pragma solidity 0.6.11;

import "./IPool.sol";

    
interface IActivePool is IPool {
    // --- Events ---
    event BorrowerOperationsAddressChanged(address _newBorrowerOperationsAddress);
    event TroveManagerAddressChanged(address _newTroveManagerAddress);
    event ActivePoolYUSDDebtUpdated(uint _YUSDDebt);
    event ActivePoolCollateralBalanceUpdated(address _collateral, uint _amount);

    // --- Functions ---
    
    function sendCollaterals(address _to, address[] memory _tokens, uint[] memory _amounts) external returns (bool);
    function sendCollateralsUnwrap(
        address _to,
        address[] memory _tokens,
        uint[] memory _amounts,
        bool _collectRewards) external returns (bool);
    function getCollateralVC(address collateralAddress) external view returns (uint);
    function addCollateralType(address _collateral) external;
}

File 8 of 18 : IDefaultPool.sol
// SPDX-License-Identifier: UNLICENSED

pragma solidity 0.6.11;

import "./IPool.sol";

interface IDefaultPool is IPool {
    // --- Events ---
    event TroveManagerAddressChanged(address _newTroveManagerAddress);
    event DefaultPoolYUSDDebtUpdated(uint _YUSDDebt);
    event DefaultPoolETHBalanceUpdated(uint _ETH);

    // --- Functions ---
    
    function sendCollsToActivePool(address[] memory _collaterals, uint[] memory _amounts, address _borrower) external;
    function addCollateralType(address _collateral) external;
    function getCollateralVC(address collateralAddress) external view returns (uint);
}

File 9 of 18 : IStabilityPool.sol
// SPDX-License-Identifier: UNLICENSED

pragma solidity 0.6.11;

import "./ICollateralReceiver.sol";

/*
 * The Stability Pool holds YUSD tokens deposited by Stability Pool depositors.
 *
 * When a trove is liquidated, then depending on system conditions, some of its YUSD debt gets offset with
 * YUSD in the Stability Pool:  that is, the offset debt evaporates, and an equal amount of YUSD tokens in the Stability Pool is burned.
 *
 * Thus, a liquidation causes each depositor to receive a YUSD loss, in proportion to their deposit as a share of total deposits.
 * They also receive an ETH gain, as the ETH collateral of the liquidated trove is distributed among Stability depositors,
 * in the same proportion.
 *
 * When a liquidation occurs, it depletes every deposit by the same fraction: for example, a liquidation that depletes 40%
 * of the total YUSD in the Stability Pool, depletes 40% of each deposit.
 *
 * A deposit that has experienced a series of liquidations is termed a "compounded deposit": each liquidation depletes the deposit,
 * multiplying it by some factor in range ]0,1[
 *
 * Please see the implementation spec in the proof document, which closely follows on from the compounded deposit / ETH gain derivations:
 * https://github.com/liquity/liquity/blob/master/papers/Scalable_Reward_Distribution_with_Compounding_Stakes.pdf
 *
 * --- YETI ISSUANCE TO STABILITY POOL DEPOSITORS ---
 *
 * An YETI issuance event occurs at every deposit operation, and every liquidation.
 *
 * Each deposit is tagged with the address of the front end through which it was made.
 *
 * All deposits earn a share of the issued YETI in proportion to the deposit as a share of total deposits. The YETI earned
 * by a given deposit, is split between the depositor and the front end through which the deposit was made, based on the front end's kickbackRate.
 *
 * Please see the system Readme for an overview:
 * https://github.com/liquity/dev/blob/main/README.md#yeti-issuance-to-stability-providers
 */
interface IStabilityPool is ICollateralReceiver {

    // --- Events ---
    
    event StabilityPoolETHBalanceUpdated(uint _newBalance);
    event StabilityPoolYUSDBalanceUpdated(uint _newBalance);

    event BorrowerOperationsAddressChanged(address _newBorrowerOperationsAddress);
    event TroveManagerAddressChanged(address _newTroveManagerAddress);
    event ActivePoolAddressChanged(address _newActivePoolAddress);
    event DefaultPoolAddressChanged(address _newDefaultPoolAddress);
    event YUSDTokenAddressChanged(address _newYUSDTokenAddress);
    event SortedTrovesAddressChanged(address _newSortedTrovesAddress);
    event PriceFeedAddressChanged(address _newPriceFeedAddress);
    event CommunityIssuanceAddressChanged(address _newCommunityIssuanceAddress);

    event P_Updated(uint _P);
    event S_Updated(uint _S, uint128 _epoch, uint128 _scale);
    event G_Updated(uint _G, uint128 _epoch, uint128 _scale);
    event EpochUpdated(uint128 _currentEpoch);
    event ScaleUpdated(uint128 _currentScale);

    event FrontEndRegistered(address indexed _frontEnd, uint _kickbackRate);
    event FrontEndTagSet(address indexed _depositor, address indexed _frontEnd);

    event DepositSnapshotUpdated(address indexed _depositor, uint _P, uint _S, uint _G);
    event FrontEndSnapshotUpdated(address indexed _frontEnd, uint _P, uint _G);
    event UserDepositChanged(address indexed _depositor, uint _newDeposit);
    event FrontEndStakeChanged(address indexed _frontEnd, uint _newFrontEndStake, address _depositor);

    event ETHGainWithdrawn(address indexed _depositor, uint _ETH, uint _YUSDLoss);
    event YETIPaidToDepositor(address indexed _depositor, uint _YETI);
    event YETIPaidToFrontEnd(address indexed _frontEnd, uint _YETI);
    event EtherSent(address _to, uint _amount);

    // --- Functions ---

    /*
     * Called only once on init, to set addresses of other Liquity contracts
     * Callable only by owner, renounces ownership at the end
     */
    function setAddresses(
        address _borrowerOperationsAddress,
        address _troveManagerAddress,
        address _activePoolAddress,
        address _yusdTokenAddress,
        address _sortedTrovesAddress,
        address _communityIssuanceAddress,
        address _whitelistAddress,
        address _troveManagerLiquidationsAddress
    )
        external;

    /*
     * Initial checks:
     * - Frontend is registered or zero address
     * - Sender is not a registered frontend
     * - _amount is not zero
     * ---
     * - Triggers a YETI issuance, based on time passed since the last issuance. The YETI issuance is shared between *all* depositors and front ends
     * - Tags the deposit with the provided front end tag param, if it's a new deposit
     * - Sends depositor's accumulated gains (YETI, ETH) to depositor
     * - Sends the tagged front end's accumulated YETI gains to the tagged front end
     * - Increases deposit and tagged front end's stake, and takes new snapshots for each.
     */
    function provideToSP(uint _amount, address _frontEndTag) external;

    /*
     * Initial checks:
     * - _amount is zero or there are no under collateralized troves left in the system
     * - User has a non zero deposit
     * ---
     * - Triggers a YETI issuance, based on time passed since the last issuance. The YETI issuance is shared between *all* depositors and front ends
     * - Removes the deposit's front end tag if it is a full withdrawal
     * - Sends all depositor's accumulated gains (YETI, ETH) to depositor
     * - Sends the tagged front end's accumulated YETI gains to the tagged front end
     * - Decreases deposit and tagged front end's stake, and takes new snapshots for each.
     *
     * If _amount > userDeposit, the user withdraws all of their compounded deposit.
     */
    function withdrawFromSP(uint _amount) external;


    /*
     * Initial checks:
     * - Frontend (sender) not already registered
     * - User (sender) has no deposit
     * - _kickbackRate is in the range [0, 100%]
     * ---
     * Front end makes a one-time selection of kickback rate upon registering
     */
    function registerFrontEnd(uint _kickbackRate) external;

    /*
     * Initial checks:
     * - Caller is TroveManager
     * ---
     * Cancels out the specified debt against the YUSD contained in the Stability Pool (as far as possible)
     * and transfers the Trove's ETH collateral from ActivePool to StabilityPool.
     * Only called by liquidation functions in the TroveManager.
     */
    function offset(uint _debt, address[] memory _assets, uint[] memory _amountsAdded) external;

//    /*
//     * Returns the total amount of ETH held by the pool, accounted in an internal variable instead of `balance`,
//     * to exclude edge cases like ETH received from a self-destruct.
//     */
//    function getETH() external view returns (uint);
    
     //*
//     * Calculates and returns the total gains a depositor has accumulated 
//     */
    function  getDepositorGains(address _depositor) external view returns (address[] memory assets, uint[] memory amounts);


    /*
     * Returns the total amount of VC held by the pool, accounted for by multipliying the
     * internal balances of collaterals by the price that is found at the time getVC() is called.
     */
    function getVC() external view returns (uint);

    /*
     * Returns YUSD held in the pool. Changes when users deposit/withdraw, and when Trove debt is offset.
     */
    function getTotalYUSDDeposits() external view returns (uint);

    /*
     * Calculate the YETI gain earned by a deposit since its last snapshots were taken.
     * If not tagged with a front end, the depositor gets a 100% cut of what their deposit earned.
     * Otherwise, their cut of the deposit's earnings is equal to the kickbackRate, set by the front end through
     * which they made their deposit.
     */
    function getDepositorYETIGain(address _depositor) external view returns (uint);

    /*
     * Return the YETI gain earned by the front end.
     */
    function getFrontEndYETIGain(address _frontEnd) external view returns (uint);

    /*
     * Return the user's compounded deposit.
     */
    function getCompoundedYUSDDeposit(address _depositor) external view returns (uint);

    /*
     * Return the front end's compounded stake.
     *
     * The front end's compounded stake is equal to the sum of its depositors' compounded deposits.
     */
    function getCompoundedFrontEndStake(address _frontEnd) external view returns (uint);

    /*
     * Add collateral type to totalColl 
     */
    function addCollateralType(address _collateral) external;

    function getDepositSnapshotS(address depositor, address collateral) external view returns (uint);

    function getCollateral(address _collateral) external view returns (uint);

    function getAllCollateral() external view returns (address[] memory, uint256[] memory);

}

File 10 of 18 : ICollSurplusPool.sol
// SPDX-License-Identifier: UNLICENSED

pragma solidity 0.6.11;

import "../Dependencies/YetiCustomBase.sol";
import "./ICollateralReceiver.sol";


interface ICollSurplusPool is ICollateralReceiver {

    // --- Events ---
    
    event BorrowerOperationsAddressChanged(address _newBorrowerOperationsAddress);
    event TroveManagerAddressChanged(address _newTroveManagerAddress);
    event ActivePoolAddressChanged(address _newActivePoolAddress);

    event CollBalanceUpdated(address indexed _account);
    event CollateralSent(address _to);

    // --- Contract setters ---

    function setAddresses(
        address _borrowerOperationsAddress,
        address _troveManagerAddress,
        address _troveManagerRedemptionsAddress,
        address _activePoolAddress,
        address _whitelistAddress
    ) external;

    function getCollVC() external view returns (uint);

    function getAmountClaimable(address _account, address _collateral) external view returns (uint);

    function getCollateral(address _collateral) external view returns (uint);

    function getAllCollateral() external view returns (address[] memory, uint256[] memory);

    function accountSurplus(address _account, address[] memory _tokens, uint[] memory _amounts) external;

    function claimColl(address _account) external;

    function addCollateralType(address _collateral) external;
}

File 11 of 18 : IERC20.sol
// SPDX-License-Identifier: UNLICENSED

pragma solidity 0.6.11;

/**
 * Based on the OpenZeppelin IER20 interface:
 * https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC20/IERC20.sol
 *
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);
    function increaseAllowance(address spender, uint256 addedValue) external returns (bool);
    function decreaseAllowance(address spender, uint256 subtractedValue) external returns (bool);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `sender` to `recipient` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);

    function name() external view returns (string memory);
    function symbol() external view returns (string memory);
    function decimals() external view returns (uint8);
    
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);
}

File 12 of 18 : LiquityMath.sol
// SPDX-License-Identifier: UNLICENSED

pragma solidity 0.6.11;

import "./SafeMath.sol";

library LiquityMath {
    using SafeMath for uint;

    uint internal constant DECIMAL_PRECISION = 1e18;

    function _min(uint _a, uint _b) internal pure returns (uint) {
        return (_a < _b) ? _a : _b;
    }

    function _max(uint _a, uint _b) internal pure returns (uint) {
        return (_a >= _b) ? _a : _b;
    }

    /* 
    * Multiply two decimal numbers and use normal rounding rules:
    * -round product up if 19'th mantissa digit >= 5
    * -round product down if 19'th mantissa digit < 5
    *
    * Used only inside the exponentiation, _decPow().
    */
    function decMul(uint x, uint y) internal pure returns (uint decProd) {
        uint prod_xy = x.mul(y);

        decProd = prod_xy.add(DECIMAL_PRECISION / 2).div(DECIMAL_PRECISION);
    }

    /* 
    * _decPow: Exponentiation function for 18-digit decimal base, and integer exponent n.
    * 
    * Uses the efficient "exponentiation by squaring" algorithm. O(log(n)) complexity. 
    * 
    * Called by two functions that represent time in units of minutes:
    * 1) TroveManager._calcDecayedBaseRate
    * 2) CommunityIssuance._getCumulativeIssuanceFraction 
    * 
    * The exponent is capped to avoid reverting due to overflow. The cap 525600000 equals
    * "minutes in 1000 years": 60 * 24 * 365 * 1000
    * 
    * If a period of > 1000 years is ever used as an exponent in either of the above functions, the result will be
    * negligibly different from just passing the cap, since: 
    *
    * In function 1), the decayed base rate will be 0 for 1000 years or > 1000 years
    * In function 2), the difference in tokens issued at 1000 years and any time > 1000 years, will be negligible
    */
    function _decPow(uint _base, uint _minutes) internal pure returns (uint) {
       
        if (_minutes > 525600000) {_minutes = 525600000;}  // cap to avoid overflow
    
        if (_minutes == 0) {return DECIMAL_PRECISION;}

        uint y = DECIMAL_PRECISION;
        uint x = _base;
        uint n = _minutes;

        // Exponentiation-by-squaring
        while (n > 1) {
            if (n % 2 == 0) {
                x = decMul(x, x);
                n = n.div(2);
            } else { // if (n % 2 != 0)
                y = decMul(x, y);
                x = decMul(x, x);
                n = (n.sub(1)).div(2);
            }
        }

        return decMul(x, y);
  }

    function _getAbsoluteDifference(uint _a, uint _b) internal pure returns (uint) {
        return (_a >= _b) ? _a.sub(_b) : _b.sub(_a);
    }

    //  _coll should be the amount of VC and _debt is debt of YUSD\
    // new collateral ratio is 10**18 times the collateral ratio. (150% => 1.5e18)
    function _computeCR(uint _coll, uint _debt) internal pure returns (uint) {
        if (_debt > 0) {
            uint newCollRatio = _coll.mul(10**18).div(_debt);
            return newCollRatio;
        }
        // Return the maximal value for uint256 if the Trove has a debt of 0. Represents "infinite" CR.
        else { // if (_debt == 0)
            return 2**256 - 1; 
        }
    }

}

File 13 of 18 : CheckContract.sol
// SPDX-License-Identifier: UNLICENSED

pragma solidity 0.6.11;


contract CheckContract {
    /**
     * Check that the account is an already deployed non-destroyed contract.
     * See: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/Address.sol#L12
     */
    function checkContract(address _account) internal view {
        require(_account != address(0), "Account cannot be zero address");

        uint256 size;
        // solhint-disable-next-line no-inline-assembly
        assembly { size := extcodesize(_account) }
        require(size > 0, "Account code size cannot be zero");
    }
}

File 14 of 18 : IPool.sol
// SPDX-License-Identifier: UNLICENSED

pragma solidity 0.6.11;

import "./ICollateralReceiver.sol";

// Common interface for the Pools.
interface IPool is ICollateralReceiver {
    
    // --- Events ---
    
    event ETHBalanceUpdated(uint _newBalance);
    event YUSDBalanceUpdated(uint _newBalance);
    event ActivePoolAddressChanged(address _newActivePoolAddress);
    event DefaultPoolAddressChanged(address _newDefaultPoolAddress);
    event StabilityPoolAddressChanged(address _newStabilityPoolAddress);
    event WhitelistAddressChanged(address _newWhitelistAddress);
    event EtherSent(address _to, uint _amount);
    event CollateralSent(address _collateral, address _to, uint _amount);

    // --- Functions ---

    function getVC() external view returns (uint);

    function getCollateral(address collateralAddress) external view returns (uint);

    function getAllCollateral() external view returns (address[] memory, uint256[] memory);

    function getYUSDDebt() external view returns (uint);

    function increaseYUSDDebt(uint _amount) external;

    function decreaseYUSDDebt(uint _amount) external;

}

File 15 of 18 : ICollateralReceiver.sol
// SPDX-License-Identifier: UNLICENSED

pragma solidity 0.6.11;

interface ICollateralReceiver {
    function receiveCollateral(address[] memory _tokens, uint[] memory _amounts) external;
}

File 16 of 18 : YetiCustomBase.sol
// SPDX-License-Identifier: UNLICENSED

pragma solidity 0.6.11;

import "./BaseMath.sol";
import "./SafeMath.sol";
import "../Interfaces/IERC20.sol";
import "../Interfaces/IWhitelist.sol";


contract YetiCustomBase is BaseMath {
    using SafeMath for uint256;

    IWhitelist whitelist;

    struct newColls {
        // tokens and amounts should be the same length
        address[] tokens;
        uint256[] amounts;
    }

    // Collateral math

    // gets the sum of _coll1 and _coll2
    function _sumColls(newColls memory _coll1, newColls memory _coll2)
        internal
        view
        returns (newColls memory finalColls)
    {
        newColls memory coll3;

        coll3.tokens = whitelist.getValidCollateral();
        coll3.amounts = new uint256[](coll3.tokens.length);

        uint256 n = 0;
        for (uint256 i = 0; i < _coll1.tokens.length; i++) {
            uint256 tokenIndex = whitelist.getIndex(_coll1.tokens[i]);
            if (_coll1.amounts[i] > 0) {
                n++;
                coll3.amounts[tokenIndex] = _coll1.amounts[i];
            }
        }

        for (uint256 i = 0; i < _coll2.tokens.length; i++) {
            uint256 tokenIndex = whitelist.getIndex(_coll2.tokens[i]);
            if (_coll2.amounts[i] > 0) {
                if (coll3.amounts[tokenIndex] == 0) {
                    n++;
                }
                coll3.amounts[tokenIndex] = coll3.amounts[tokenIndex].add(_coll2.amounts[i]);
            }
        }

        address[] memory sumTokens = new address[](n);
        uint256[] memory sumAmounts = new uint256[](n);
        uint256 j = 0;

        // should only find n amounts over 0
        for (uint256 i = 0; i < coll3.tokens.length; i++) {
            if (coll3.amounts[i] > 0) {
                sumTokens[j] = coll3.tokens[i];
                sumAmounts[j] = coll3.amounts[i];
                j++;
            }
        }
        finalColls.tokens = sumTokens;
        finalColls.amounts = sumAmounts;
    }


    // gets the sum of coll1 with tokens and amounts
    function _sumColls(
        newColls memory _coll1,
        address[] memory tokens,
        uint256[] memory amounts
    ) internal view returns (newColls memory) {
        newColls memory coll2 = newColls(tokens, amounts);
        return _sumColls(_coll1, coll2);
    }


    function _sumColls(
        address[] memory tokens1,
        uint256[] memory amounts1,
        address[] memory tokens2,
        uint256[] memory amounts2
    ) internal view returns (newColls memory) {
        newColls memory coll1 = newColls(tokens1, amounts1);
        return _sumColls(coll1, tokens2, amounts2);
    }


    // Function for summing colls when coll1 includes all the tokens in the whitelist
    // Used in active, default, stability, and surplus pools
    // assumes _coll1.tokens = all whitelisted tokens
    function _leftSumColls(
        newColls memory _coll1,
        address[] memory _tokens,
        uint256[] memory _amounts
    ) internal view returns (uint[] memory) {
        uint[] memory sumAmounts = _getArrayCopy(_coll1.amounts);

        // assumes that sumAmounts length = whitelist tokens length.
        for (uint256 i = 0; i < _tokens.length; i++) {
            uint tokenIndex = whitelist.getIndex(_tokens[i]);
            sumAmounts[tokenIndex] = sumAmounts[tokenIndex].add(_amounts[i]);
        }

        return sumAmounts;
    }


    // Function for summing colls when one list is all tokens. Used in active, default, stability, and surplus pools
    function _leftSubColls(newColls memory _coll1, address[] memory _subTokens, uint[] memory _subAmounts)
        internal
        view
        returns (uint[] memory)
    {
        uint[] memory diffAmounts = _getArrayCopy(_coll1.amounts);

        //assumes that coll1.tokens = whitelist tokens. Keeps all of coll1's tokens, and subtracts coll2's amounts
        for (uint256 i = 0; i < _subTokens.length; i++) {
            uint256 tokenIndex = whitelist.getIndex(_subTokens[i]);
            diffAmounts[tokenIndex] = diffAmounts[tokenIndex].sub(_subAmounts[i]);
        }
        return diffAmounts;
    }
    

    // Returns _coll1 minus _tokens and _amounts
    // will error if _tokens include a token not in _coll1.tokens
    function _subColls(newColls memory _coll1, address[] memory _tokens, uint[] memory _amounts)
        internal
        view
        returns (newColls memory finalColls)
    {
        require(_tokens.length == _amounts.length, "Sub Colls invalid input");

        newColls memory coll3;
        coll3.tokens = whitelist.getValidCollateral();
        coll3.amounts = new uint256[](coll3.tokens.length);
        uint256 n = 0;

        for (uint256 i = 0; i < _coll1.tokens.length; i++) {
            if (_coll1.amounts[i] > 0) {
                uint256 tokenIndex = whitelist.getIndex(_coll1.tokens[i]);
                coll3.amounts[tokenIndex] = _coll1.amounts[i];
                n++;
            }
        }

        for (uint256 i = 0; i < _tokens.length; i++) {
            uint256 tokenIndex = whitelist.getIndex(_tokens[i]);
            require(coll3.amounts[tokenIndex] >= _amounts[i], "illegal sub");
            coll3.amounts[tokenIndex] = coll3.amounts[tokenIndex].sub(_amounts[i]);
            if (coll3.amounts[tokenIndex] == 0) {
                n--;
            }
        }

        address[] memory diffTokens = new address[](n);
        uint256[] memory diffAmounts = new uint256[](n);
        uint256 j = 0;

        for (uint256 i = 0; i < coll3.tokens.length; i++) {
            if (coll3.amounts[i] > 0) {
                diffTokens[j] = coll3.tokens[i];
                diffAmounts[j] = coll3.amounts[i];
                j++;
            }
        }
        finalColls.tokens = diffTokens;
        finalColls.amounts = diffAmounts;
    }

    function _getArrayCopy(uint[] memory _arr) internal pure returns (uint[] memory){
        uint[] memory copy = new uint[](_arr.length);
        for (uint i = 0; i < _arr.length; i++) {
            copy[i] = _arr[i];
        }
        return copy;
    }
}

File 17 of 18 : BaseMath.sol
// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.6.11;


contract BaseMath {
    uint constant public DECIMAL_PRECISION = 1e18;
}

File 18 of 18 : SafeMath.sol
// SPDX-License-Identifier: UNLICENSED

pragma solidity 0.6.11;

/**
 * Based on OpenZeppelin's SafeMath:
 * https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/math/SafeMath.sol
 *
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");

        return c;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     * - Subtraction cannot overflow.
     *
     * _Available since v2.4.0._
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;

        return c;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) {
            return 0;
        }

        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");

        return c;
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     *
     * _Available since v2.4.0._
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        // Solidity only automatically asserts when dividing by 0
        require(b > 0, errorMessage);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return mod(a, b, "SafeMath: modulo by zero");
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts with custom message when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     *
     * _Available since v2.4.0._
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}

Settings
{
  "optimizer": {
    "enabled": true,
    "runs": 100
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

Contract ABI

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e":"address","name":"_collateral","type":"address"}],"name":"getIsActive","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_collateral","type":"address"}],"name":"getOracle","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_collateral","type":"address"}],"name":"getPrice","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_collateral","type":"address"}],"name":"getPriceCurve","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_collateral","type":"address"}],"name":"getRatio","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getValidCollateral","outputs":[{"internalType":"address[]","name":"","type":"address[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_collateral","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"getValueUSD","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_collateral","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"getValueVC","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"isOwner","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_router","type":"address"}],"name":"isValidRouter","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_collateral","type":"address"}],"name":"isWrapped","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_activePoolAddress","type":"address"},{"internalType":"address","name":"_defaultPoolAddress","type":"address"},{"internalType":"address","name":"_stabilityPoolAddress","type":"address"},{"internalType":"address","name":"_collSurplusPoolAddress","type":"address"},{"internalType":"address","name":"_borrowerOperationsAddress","type":"address"}],"name":"setAddresses","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_collateral","type":"address"},{"internalType":"address","name":"_router","type":"address"}],"name":"setDefaultRouter","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_collateral","type":"address"}],"name":"undeprecateCollateral","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"validCollateral","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"validRouter","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"}]

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Block Transaction Gas Used Reward
Age Block Fee Address BC Fee Address Voting Power Jailed Incoming
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