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// SPDX-License-Identifier: MIT

pragma solidity 0.6.12;

pragma solidity ^0.8.0;

import "@openzeppelin/contracts/math/Math.sol";

import "@openzeppelin/contracts/utils/math/Math.sol";

import "@openzeppelin/contracts/utils/math/SafeMath.sol";

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";

import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";

import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";

import "@openzeppelin/contracts/utils/ReentrancyGuard.sol";

import "@openzeppelin/contracts/security/ReentrancyGuard.sol";

import "./lib/Babylonian.sol";

import "./owner/Operator.sol";

import "./utils/ContractGuard.sol";

import "./interfaces/IBasisAsset.sol";

import "./interfaces/IOracle.sol";

import "./interfaces/IMasonry.sol";

import "./interfaces/IAcropolis.sol";

______ __ _______

__________ .___ ___________.__

/_ __/___ ____ ___ / /_ / ____(_)___ ____ _____ ________

\______ \_____ ______ ____ __| _/ \_ _____/|__| ____ _____ ____ ____ ____

/ / / __ \/ __ `__ \/ __ \ / /_ / / __ \/ __ `/ __ \/ ___/ _ \

| | _/\__ \ / ___/_/ __ \ / __ | | __) | | / \ \__ \ / \ _/ ___\_/ __ \

/ / / /_/ / / / / / / /_/ / / __/ / / / / / /_/ / / / / /__/ __/

| | \ / __ \_ \___ \ \ ___/ / /_/ | | \ | || | \ / __ \_| | \\ \___\ ___/

/_/ \____/_/ /_/ /_/_.___/ /_/ /_/_/ /_/\__,_/_/ /_/\___/\___/

|______ /(____ //____ > \___ >\____ | \___ / |__||___| /(____ /|___| / \___ >\___ >

\/ \/ \/ \/ \/ \/ \/ \/ \/ \/ \/

http://tomb.finance

contract Treasury is ContractGuard {

using SafeERC20 for IERC20;

using Address for address;

using SafeMath for uint256;

/* ========= CONSTANT VARIABLES ======== */

uint256 public constant PERIOD = 6 hours;

/* ========== STATE VARIABLES ========== */

// governance

address public operator;

// flags

bool public initialized = false;

// epoch

uint256 public startTime;

uint256 public epoch = 0;

uint256 public epochSupplyContractionLeft = 0;

// exclusions from total supply

//=================================================================// exclusions from total supply

address[] public excludedFromTotalSupply = [

address(0x9A896d3c54D7e45B558BD5fFf26bF1E8C031F93b), // TombGenesisPool

address(0x9Ec66B9409d4cD8D4a4C90950Ff0fd26bB39ad84) // BasedGenesisPool

address(0xa7b9123f4b15fE0fF01F469ff5Eab2b41296dC0E), // new TombRewardPool

address(0xA7B16703470055881e7EE093e9b0bF537f29CD4d) // old TombRewardPool

];

// core components

address public tomb;

address public based;

address public tbond;

address public bbond;

address public tshare;

address public bshare;

address public masonry;

address public acropolis;

address public tombOracle;

address public basedOracle;

// price

uint256 public tombPriceOne;

uint256 public basedPriceOne;

uint256 public tombPriceCeiling;

uint256 public basedPriceCeiling;

uint256 public seigniorageSaved;

uint256[] public supplyTiers;

uint256[] public maxExpansionTiers;

uint256 public maxSupplyExpansionPercent;

uint256 public bondDepletionFloorPercent;

uint256 public seigniorageExpansionFloorPercent;

uint256 public maxSupplyContractionPercent;

uint256 public maxDebtRatioPercent;

// 28 first epochs (1 week) with 4.5% expansion regardless of TOMB price

// 14 first epochs (0.5 week) with 4.5% expansion regardless of BASED price

uint256 public bootstrapEpochs;

uint256 public bootstrapSupplyExpansionPercent;

/* =================== Added variables =================== */

uint256 public previousEpochTombPrice;

uint256 public previousEpochBasedPrice;

uint256 public maxDiscountRate; // when purchasing bond

uint256 public maxPremiumRate; // when redeeming bond

uint256 public discountPercent;

uint256 public premiumThreshold;

uint256 public premiumPercent;

uint256 public mintingFactorForPayingDebt; // print extra TOMB during debt phase

uint256 public mintingFactorForPayingDebt; // print extra BASED during debt phase

address public daoFund;

uint256 public daoFundSharedPercent;

//=================================================//

address public devFund;

uint256 public devFundSharedPercent;

address public teamFund;

uint256 public teamFundSharedPercent;

/* =================== Events =================== */

event Initialized(address indexed executor, uint256 at);

event BurnedBonds(address indexed from, uint256 bondAmount);

event RedeemedBonds(address indexed from, uint256 tombAmount, uint256 bondAmount);

event RedeemedBonds(address indexed from, uint256 basedAmount, uint256 bondAmount);

event BoughtBonds(address indexed from, uint256 tombAmount, uint256 bondAmount);

event BoughtBonds(address indexed from, uint256 basedAmount, uint256 bondAmount);

event TreasuryFunded(uint256 timestamp, uint256 seigniorage);

event MasonryFunded(uint256 timestamp, uint256 seigniorage);

event AcropolisFunded(uint256 timestamp, uint256 seigniorage);

event DaoFundFunded(uint256 timestamp, uint256 seigniorage);

event DevFundFunded(uint256 timestamp, uint256 seigniorage);

event TeamFundFunded(uint256 timestamp, uint256 seigniorage);

/* =================== Modifier =================== */

modifier onlyOperator() {

require(operator == msg.sender, "Treasury: caller is not the operator");

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Texte d'origine

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// SPDX-License-Identifier: MIT

pragma solidity 0.6.12;

import "@openzeppelin/contracts/math/Math.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "@openzeppelin/contracts/utils/ReentrancyGuard.sol";

import "./lib/Babylonian.sol";
import "./owner/Operator.sol";
import "./utils/ContractGuard.sol";
import "./interfaces/IBasisAsset.sol";
import "./interfaces/IOracle.sol";
import "./interfaces/IMasonry.sol";

/*
  ______                __       _______
 /_  __/___  ____ ___  / /_     / ____(_)___  ____ _____  ________
  / / / __ \/ __ `__ \/ __ \   / /_  / / __ \/ __ `/ __ \/ ___/ _ \
 / / / /_/ / / / / / / /_/ /  / __/ / / / / / /_/ / / / / /__/  __/
/_/  \____/_/ /_/ /_/_.___/  /_/   /_/_/ /_/\__,_/_/ /_/\___/\___/

http://tomb.finance
*/
contract Treasury is ContractGuard {
    using SafeERC20 for IERC20;
    using Address for address;
    using SafeMath for uint256;

/* ========= CONSTANT VARIABLES ======== */

uint256 public constant PERIOD = 6 hours;

/* ========== STATE VARIABLES ========== */

// governance
    address public operator;

// flags
    bool public initialized = false;

// epoch
    uint256 public startTime;
    uint256 public epoch = 0;
    uint256 public epochSupplyContractionLeft = 0;

// exclusions from total supply
    address[] public excludedFromTotalSupply = [
        address(0x9A896d3c54D7e45B558BD5fFf26bF1E8C031F93b), // TombGenesisPool
        address(0xa7b9123f4b15fE0fF01F469ff5Eab2b41296dC0E), // new TombRewardPool
        address(0xA7B16703470055881e7EE093e9b0bF537f29CD4d) // old TombRewardPool
    ];

// core components
    address public tomb;
    address public tbond;
    address public tshare;

address public masonry;
    address public tombOracle;

// price
    uint256 public tombPriceOne;
    uint256 public tombPriceCeiling;

uint256 public seigniorageSaved;

uint256[] public supplyTiers;
    uint256[] public maxExpansionTiers;

uint256 public maxSupplyExpansionPercent;
    uint256 public bondDepletionFloorPercent;
    uint256 public seigniorageExpansionFloorPercent;
    uint256 public maxSupplyContractionPercent;
    uint256 public maxDebtRatioPercent;

// 28 first epochs (1 week) with 4.5% expansion regardless of TOMB price
    uint256 public bootstrapEpochs;
    uint256 public bootstrapSupplyExpansionPercent;

/* =================== Added variables =================== */
    uint256 public previousEpochTombPrice;
    uint256 public maxDiscountRate; // when purchasing bond
    uint256 public maxPremiumRate; // when redeeming bond
    uint256 public discountPercent;
    uint256 public premiumThreshold;
    uint256 public premiumPercent;
    uint256 public mintingFactorForPayingDebt; // print extra TOMB during debt phase

address public daoFund;
    uint256 public daoFundSharedPercent;

address public devFund;
    uint256 public devFundSharedPercent;

/* =================== Events =================== */

event Initialized(address indexed executor, uint256 at);
    event BurnedBonds(address indexed from, uint256 bondAmount);
    event RedeemedBonds(address indexed from, uint256 tombAmount, uint256 bondAmount);
    event BoughtBonds(address indexed from, uint256 tombAmount, uint256 bondAmount);
    event TreasuryFunded(uint256 timestamp, uint256 seigniorage);
    event MasonryFunded(uint256 timestamp, uint256 seigniorage);
    event DaoFundFunded(uint256 timestamp, uint256 seigniorage);
    event DevFundFunded(uint256 timestamp, uint256 seigniorage);

/* =================== Modifier =================== */

modifier onlyOperator() {
        require(operator == msg.sender, "Treasury: caller is not the operator");
        _;
    }

modifier checkCondition {
        require(now >= startTime, "Treasury: not started yet");

_;
    }

modifier checkEpoch {
        require(now >= nextEpochPoint(), "Treasury: not opened yet");

epoch = epoch.add(1);
        epochSupplyContractionLeft = (getTombPrice() > tombPriceCeiling) ? 0 : getTombCirculatingSupply().mul(maxSupplyContractionPercent).div(10000);
    }

modifier checkOperator {
        require(
            IBasisAsset(tomb).operator() == address(this) &&
                IBasisAsset(tbond).operator() == address(this) &&
                IBasisAsset(tshare).operator() == address(this) &&
                Operator(masonry).operator() == address(this),
            "Treasury: need more permission"
        );

_;
    }

modifier notInitialized {
        require(!initialized, "Treasury: already initialized");

_;
    }

/* ========== VIEW FUNCTIONS ========== */

function isInitialized() public view returns (bool) {
        return initialized;
    }

// epoch
    function nextEpochPoint() public view returns (uint256) {
        return startTime.add(epoch.mul(PERIOD));
    }

// oracle
    function getTombPrice() public view returns (uint256 tombPrice) {
        try IOracle(tombOracle).consult(tomb, 1e18) returns (uint144 price) {
            return uint256(price);
        } catch {
            revert("Treasury: failed to consult TOMB price from the oracle");
        }
    }

function getTombUpdatedPrice() public view returns (uint256 _tombPrice) {
        try IOracle(tombOracle).twap(tomb, 1e18) returns (uint144 price) {
            return uint256(price);
        } catch {
            revert("Treasury: failed to consult TOMB price from the oracle");
        }
    }

// budget
    function getReserve() public view returns (uint256) {
        return seigniorageSaved;
    }

/* ========== GOVERNANCE ========== */

function initialize(
        address _tomb,
        address _tbond,
        address _tshare,
        address _tombOracle,
        address _masonry,
        uint256 _startTime
    ) public notInitialized {
        tomb = _tomb;
        tbond = _tbond;
        tshare = _tshare;
        tombOracle = _tombOracle;
        masonry = _masonry;
        startTime = _startTime;

tombPriceOne = 10**18;
        tombPriceCeiling = tombPriceOne.mul(101).div(100);

// Dynamic max expansion percent
        supplyTiers = [0 ether, 500000 ether, 1000000 ether, 1500000 ether, 2000000 ether, 5000000 ether, 10000000 ether, 20000000 ether, 50000000 ether];
        maxExpansionTiers = [450, 400, 350, 300, 250, 200, 150, 125, 100];

maxSupplyExpansionPercent = 400; // Upto 4.0% supply for expansion

bondDepletionFloorPercent = 10000; // 100% of Bond supply for depletion floor
        seigniorageExpansionFloorPercent = 3500; // At least 35% of expansion reserved for masonry
        maxSupplyContractionPercent = 300; // Upto 3.0% supply for contraction (to burn TOMB and mint tBOND)
        maxDebtRatioPercent = 3500; // Upto 35% supply of tBOND to purchase

premiumThreshold = 110;
        premiumPercent = 7000;

// First 28 epochs with 4.5% expansion
        bootstrapEpochs = 28;
        bootstrapSupplyExpansionPercent = 450;

// set seigniorageSaved to it's balance
        seigniorageSaved = IERC20(tomb).balanceOf(address(this));

initialized = true;
        operator = msg.sender;
        emit Initialized(msg.sender, block.number);
    }

function setOperator(address _operator) external onlyOperator {
        operator = _operator;
    }

function setMasonry(address _masonry) external onlyOperator {
        masonry = _masonry;
    }

function setTombOracle(address _tombOracle) external onlyOperator {
        tombOracle = _tombOracle;
    }

function setTombPriceCeiling(uint256 _tombPriceCeiling) external onlyOperator {
        require(_tombPriceCeiling >= tombPriceOne && _tombPriceCeiling <= tombPriceOne.mul(120).div(100), "out of range"); // [$1.0, $1.2]
        tombPriceCeiling = _tombPriceCeiling;
    }

function setMaxExpansionTiersEntry(uint8 _index, uint256 _value) external onlyOperator returns (bool) {
        require(_index >= 0, "Index has to be higher than 0");
        require(_index < 9, "Index has to be lower than count of tiers");
        require(_value >= 10 && _value <= 1000, "_value: out of range"); // [0.1%, 10%]
        maxExpansionTiers[_index] = _value;
        return true;
    }

function setBondDepletionFloorPercent(uint256 _bondDepletionFloorPercent) external onlyOperator {
        require(_bondDepletionFloorPercent >= 500 && _bondDepletionFloorPercent <= 10000, "out of range"); // [5%, 100%]
        bondDepletionFloorPercent = _bondDepletionFloorPercent;
    }

function setMaxSupplyContractionPercent(uint256 _maxSupplyContractionPercent) external onlyOperator {
        require(_maxSupplyContractionPercent >= 100 && _maxSupplyContractionPercent <= 1500, "out of range"); // [0.1%, 15%]
        maxSupplyContractionPercent = _maxSupplyContractionPercent;
    }

function setMaxDebtRatioPercent(uint256 _maxDebtRatioPercent) external onlyOperator {
        require(_maxDebtRatioPercent >= 1000 && _maxDebtRatioPercent <= 10000, "out of range"); // [10%, 100%]
        maxDebtRatioPercent = _maxDebtRatioPercent;
    }

function setExtraFunds(
        address _daoFund,
        uint256 _daoFundSharedPercent,
        address _devFund,
        uint256 _devFundSharedPercent
    ) external onlyOperator {
        require(_daoFund != address(0), "zero");
        require(_daoFundSharedPercent <= 3000, "out of range"); // <= 30%
        require(_devFund != address(0), "zero");
        require(_devFundSharedPercent <= 1000, "out of range"); // <= 10%
        daoFund = _daoFund;
        daoFundSharedPercent = _daoFundSharedPercent;
        devFund = _devFund;
        devFundSharedPercent = _devFundSharedPercent;
    }

function setMaxDiscountRate(uint256 _maxDiscountRate) external onlyOperator {
        maxDiscountRate = _maxDiscountRate;
    }

function setMaxPremiumRate(uint256 _maxPremiumRate) external onlyOperator {
        maxPremiumRate = _maxPremiumRate;
    }

function setDiscountPercent(uint256 _discountPercent) external onlyOperator {
        require(_discountPercent <= 20000, "_discountPercent is over 200%");
        discountPercent = _discountPercent;
    }

function setPremiumThreshold(uint256 _premiumThreshold) external onlyOperator {
        require(_premiumThreshold >= tombPriceCeiling, "_premiumThreshold exceeds tombPriceCeiling");
        require(_premiumThreshold <= 150, "_premiumThreshold is higher than 1.5");
        premiumThreshold = _premiumThreshold;
    }

function setPremiumPercent(uint256 _premiumPercent) external onlyOperator {
        require(_premiumPercent <= 20000, "_premiumPercent is over 200%");
        premiumPercent = _premiumPercent;
    }

function setMintingFactorForPayingDebt(uint256 _mintingFactorForPayingDebt) external onlyOperator {
        require(_mintingFactorForPayingDebt >= 10000 && _mintingFactorForPayingDebt <= 20000, "_mintingFactorForPayingDebt: out of range"); // [100%, 200%]
        mintingFactorForPayingDebt = _mintingFactorForPayingDebt;
    }

/* ========== MUTABLE FUNCTIONS ========== */

function _updateTombPrice() internal {
        try IOracle(tombOracle).update() {} catch {}
    }

function getTombCirculatingSupply() public view returns (uint256) {
        IERC20 tombErc20 = IERC20(tomb);
        uint256 totalSupply = tombErc20.totalSupply();
        uint256 balanceExcluded = 0;
        for (uint8 entryId = 0; entryId < excludedFromTotalSupply.length; ++entryId) {
            balanceExcluded = balanceExcluded.add(tombErc20.balanceOf(excludedFromTotalSupply[entryId]));
        }
        return totalSupply.sub(balanceExcluded);
    }

function buyBonds(uint256 _tombAmount, uint256 targetPrice) external onlyOneBlock checkCondition checkOperator {
        require(_tombAmount > 0, "Treasury: cannot purchase bonds with zero amount");

uint256 tombPrice = getTombPrice();
        require(tombPrice == targetPrice, "Treasury: TOMB price moved");
        require(
            tombPrice < tombPriceOne, // price < $1
            "Treasury: tombPrice not eligible for bond purchase"
        );

require(_tombAmount <= epochSupplyContractionLeft, "Treasury: not enough bond left to purchase");

uint256 _rate = getBondDiscountRate();
        require(_rate > 0, "Treasury: invalid bond rate");

uint256 _bondAmount = _tombAmount.mul(_rate).div(1e18);
        uint256 tombSupply = getTombCirculatingSupply();
        uint256 newBondSupply = IERC20(tbond).totalSupply().add(_bondAmount);
        require(newBondSupply <= tombSupply.mul(maxDebtRatioPercent).div(10000), "over max debt ratio");

IBasisAsset(tomb).burnFrom(msg.sender, _tombAmount);
        IBasisAsset(tbond).mint(msg.sender, _bondAmount);

epochSupplyContractionLeft = epochSupplyContractionLeft.sub(_tombAmount);
        _updateTombPrice();

emit BoughtBonds(msg.sender, _tombAmount, _bondAmount);
    }

function redeemBonds(uint256 _bondAmount, uint256 targetPrice) external onlyOneBlock checkCondition checkOperator {
        require(_bondAmount > 0, "Treasury: cannot redeem bonds with zero amount");

uint256 tombPrice = getTombPrice();
        require(tombPrice == targetPrice, "Treasury: TOMB price moved");
        require(
            tombPrice > tombPriceCeiling, // price > $1.01
            "Treasury: tombPrice not eligible for bond purchase"
        );

uint256 _rate = getBondPremiumRate();
        require(_rate > 0, "Treasury: invalid bond rate");

uint256 _tombAmount = _bondAmount.mul(_rate).div(1e18);
        require(IERC20(tomb).balanceOf(address(this)) >= _tombAmount, "Treasury: treasury has no more budget");

seigniorageSaved = seigniorageSaved.sub(Math.min(seigniorageSaved, _tombAmount));

IBasisAsset(tbond).burnFrom(msg.sender, _bondAmount);
        IERC20(tomb).safeTransfer(msg.sender, _tombAmount);

_updateTombPrice();

emit RedeemedBonds(msg.sender, _tombAmount, _bondAmount);
    }

function _sendToMasonry(uint256 _amount) internal {
        IBasisAsset(tomb).mint(address(this), _amount);

uint256 _daoFundSharedAmount = 0;
        if (daoFundSharedPercent > 0) {
            _daoFundSharedAmount = _amount.mul(daoFundSharedPercent).div(10000);
            IERC20(tomb).transfer(daoFund, _daoFundSharedAmount);
            emit DaoFundFunded(now, _daoFundSharedAmount);
        }

uint256 _devFundSharedAmount = 0;
        if (devFundSharedPercent > 0) {
            _devFundSharedAmount = _amount.mul(devFundSharedPercent).div(10000);
            IERC20(tomb).transfer(devFund, _devFundSharedAmount);
            emit DevFundFunded(now, _devFundSharedAmount);
        }

_amount = _amount.sub(_daoFundSharedAmount).sub(_devFundSharedAmount);

IERC20(tomb).safeApprove(masonry, 0);
        IERC20(tomb).safeApprove(masonry, _amount);
        IMasonry(masonry).allocateSeigniorage(_amount);
        emit MasonryFunded(now, _amount);
    }

function governanceRecoverUnsupported(
        IERC20 _token,
        uint256 _amount,
        address _to
    ) external onlyOperator {
        // do not allow to drain core tokens
        require(address(_token) != address(tomb), "tomb");
        require(address(_token) != address(tbond), "bond");
        require(address(_token) != address(tshare), "share");
        _token.safeTransfer(_to, _amount);
    }

function masonrySetOperator(address _operator) external onlyOperator {
        IMasonry(masonry).setOperator(_operator);
    }

function masonrySetLockUp(uint256 _withdrawLockupEpochs, uint256 _rewardLockupEpochs) external onlyOperator {
        IMasonry(masonry).setLockUp(_withdrawLockupEpochs, _rewardLockupEpochs);
    }

function masonryAllocateSeigniorage(uint256 amount) external onlyOperator {
        IMasonry(masonry).allocateSeigniorage(amount);
    }

function masonryGovernanceRecoverUnsupported(
        address _token,
        uint256 _amount,
        address _to
    ) external onlyOperator {
        IMasonry(masonry).governanceRecoverUnsupported(_token, _amount, _to);
    }
}

Texte modifié

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// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "@openzeppelin/contracts/utils/math/Math.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";

/*
__________                             .___   ___________.__
\______   \_____     ______  ____    __| _/   \_   _____/|__|  ____  _____     ____    ____   ____
 |    |  _/\__  \   /  ___/_/ __ \  / __ |     |    __)  |  | /    \ \__  \   /    \ _/ ___\_/ __ \
 |    |   \ / __ \_ \___ \ \  ___/ / /_/ |     |     \   |  ||   |  \ / __ \_|   |  \\  \___\  ___/
 |______  /(____  //____  > \___  >\____ |     \___  /   |__||___|  /(____  /|___|  / \___  >\___  >
        \/      \/      \/      \/      \/         \/             \/      \/      \/      \/     \/
*/
contract Treasury is ContractGuard {
    using SafeERC20 for IERC20;
    using Address for address;
    using SafeMath for uint256;

/* ========= CONSTANT VARIABLES ======== */

uint256 public constant PERIOD = 6 hours;

/* ========== STATE VARIABLES ========== */

// governance
    address public operator;

// flags
    bool public initialized = false;

// epoch
    uint256 public startTime;
    uint256 public epoch = 0;
    uint256 public epochSupplyContractionLeft = 0;

//=================================================================// exclusions from total supply
    address[] public excludedFromTotalSupply = [
        address(0x9Ec66B9409d4cD8D4a4C90950Ff0fd26bB39ad84)    // BasedGenesisPool
    ];

// core components
    address public based;
    address public bbond;
    address public bshare;

address public acropolis;
    address public basedOracle;

// price
    uint256 public basedPriceOne;
    uint256 public basedPriceCeiling;

uint256 public seigniorageSaved;

uint256[] public supplyTiers;
    uint256[] public maxExpansionTiers;

// 14 first epochs (0.5 week) with 4.5% expansion regardless of BASED price
    uint256 public bootstrapEpochs;
    uint256 public bootstrapSupplyExpansionPercent;

/* =================== Added variables =================== */
    uint256 public previousEpochBasedPrice;
    uint256 public maxDiscountRate; // when purchasing bond
    uint256 public maxPremiumRate;  // when redeeming bond
    uint256 public discountPercent;
    uint256 public premiumThreshold;
    uint256 public premiumPercent;
    uint256 public mintingFactorForPayingDebt; // print extra BASED during debt phase

address public daoFund;
    uint256 public daoFundSharedPercent;

//=================================================//

address public devFund;
    uint256 public devFundSharedPercent;
    address public teamFund;
    uint256 public teamFundSharedPercent;

/* =================== Events =================== */

event Initialized(address indexed executor, uint256 at);
    event BurnedBonds(address indexed from, uint256 bondAmount);
    event RedeemedBonds(address indexed from, uint256 basedAmount, uint256 bondAmount);
    event BoughtBonds(address indexed from, uint256 basedAmount, uint256 bondAmount);
    event TreasuryFunded(uint256 timestamp, uint256 seigniorage);
    event AcropolisFunded(uint256 timestamp, uint256 seigniorage);
    event DaoFundFunded(uint256 timestamp, uint256 seigniorage);
    event DevFundFunded(uint256 timestamp, uint256 seigniorage);
    event TeamFundFunded(uint256 timestamp, uint256 seigniorage);

/* =================== Modifier =================== */

modifier onlyOperator() {
        require(operator == msg.sender, "Treasury: caller is not the operator");
        _;
    }

modifier checkCondition {
        require(block.timestamp >= startTime, "Treasury: not started yet");

_;
    }

modifier checkEpoch {
        require(block.timestamp >= nextEpochPoint(), "Treasury: not opened yet");

epoch = epoch.add(1);
        epochSupplyContractionLeft = (getBasedPrice() > basedPriceCeiling) ? 0 : getBasedCirculatingSupply().mul(maxSupplyContractionPercent).div(10000);
    }

modifier checkOperator {
        require(
                IBasisAsset(based).operator() == address(this) &&
                IBasisAsset(bbond).operator() == address(this) &&
                IBasisAsset(bshare).operator() == address(this) &&
                Operator(acropolis).operator() == address(this),
            "Treasury: need more permission"
        );

_;
    }

modifier notInitialized {
        require(!initialized, "Treasury: already initialized");

_;
    }

/* ========== VIEW FUNCTIONS ========== */

function isInitialized() public view returns (bool) {
        return initialized;
    }

// epoch
    function nextEpochPoint() public view returns (uint256) {
        return startTime.add(epoch.mul(PERIOD));
    }

// oracle
    function getBasedPrice() public view returns (uint256 basedPrice) {
        try IOracle(basedOracle).consult(based, 1e18) returns (uint144 price) {
            return uint256(price);
        } catch {
            revert("Treasury: failed to consult BASED price from the oracle");
        }
    }

function getBasedUpdatedPrice() public view returns (uint256 _basedPrice) {
        try IOracle(basedOracle).twap(based, 1e18) returns (uint144 price) {
            return uint256(price);
        } catch {
            revert("Treasury: failed to consult BASED price from the oracle");
        }
    }

// budget
    function getReserve() public view returns (uint256) {
        return seigniorageSaved;
    }

/* ========== GOVERNANCE ========== */

function initialize(
        address _based,
        address _bbond,
        address _bshare,
        address _basedOracle,
        address _acropolis,
        uint256 _startTime
    ) public notInitialized {
        based = _based;
        bbond = _bbond;
        bshare = _bshare;
        basedOracle = _basedOracle;
        acropolis = _acropolis;
        startTime = _startTime;

basedPriceOne = 10**18;
        basedPriceCeiling = basedPriceOne.mul(101).div(100);

// Dynamic max expansion percent
        supplyTiers = [0 ether, 206000 ether, 386000 ether, 530000 ether, 1300000 ether, 5000000 ether, 10000000 ether];
        maxExpansionTiers = [600, 500, 450, 400, 200, 100, 50];

maxSupplyExpansionPercent = 600; // Upto 4.0% supply for expansion

bondDepletionFloorPercent = 10000; // 100% of Bond supply for depletion floor
        seigniorageExpansionFloorPercent = 3500; // At least 35% of expansion reserved for acropolis
        maxSupplyContractionPercent = 300; // Upto 3.0% supply for contraction (to burn BASED and mint bBOND)
        maxDebtRatioPercent = 3500; // Upto 35% supply of bBOND to purchase

premiumThreshold = 110;
        premiumPercent = 7000;

// First 28 epochs with 4.5% expansion
        bootstrapEpochs = 14;
        bootstrapSupplyExpansionPercent = 600;

// set seigniorageSaved to it's balance
        seigniorageSaved = IERC20(based).balanceOf(address(this));

initialized = true;
        operator = msg.sender;
        emit Initialized(msg.sender, block.number);
    }

function setOperator(address _operator) external onlyOperator {
        operator = _operator;
    }

function setAcropolis(address _acropolis) external onlyOperator {
        acropolis = _acropolis;
    }

function setBasedOracle(address _basedOracle) external onlyOperator {
        basedOracle = _basedOracle;
    }

function setBasedPriceCeiling(uint256 _basedPriceCeiling) external onlyOperator {
        require(_basedPriceCeiling >= basedPriceOne && _basedPriceCeiling <= basedPriceOne.mul(120).div(100), "out of range"); // [$1.0, $1.2]
        basedPriceCeiling = _basedPriceCeiling;
    }

function setMaxExpansionTiersEntry(uint8 _index, uint256 _value) external onlyOperator returns (bool) {
        require(_index >= 0, "Index has to be higher than 0");
        require(_index < 7, "Index has to be lower than count of tiers");
        require(_value >= 10 && _value <= 1000, "_value: out of range"); // [0.1%, 10%]
        maxExpansionTiers[_index] = _value;
        return true;
    }

function setBootstrap(uint256 _bootstrapEpochs, uint256 _bootstrapSupplyExpansionPercent) external onlyOperator {
        require(_bootstrapEpochs <= 120, "_bootstrapEpochs: out of range"); // <= 1 month
        require(_bootstrapSupplyExpansionPercent >= 100 && _bootstrapSupplyExpansionPercent <= 1000, "_bootstrapSupplyExpansionPercent: out of range"); // [1%, 10%]
        bootstrapEpochs = _bootstrapEpochs;
        bootstrapSupplyExpansionPercent = _bootstrapSupplyExpansionPercent;
    }
//===============================================================================================================================================
    function setExtraFunds(
        // DAO FUND - 12%
        // DEVS WALLET - 3%
        // TEAM WALLET - 5%
        address _daoFund,
        uint256 _daoFundSharedPercent,
        address _devFund,
        uint256 _devFundSharedPercent,
        address _teamFund,
        uint256 _teamFundSharedPercent
    ) external onlyOperator {
        require(_daoFund != address(0), "zero");
        require(_daoFundSharedPercent <= 1500, "out of range"); // <= 15%
        require(_devFund != address(0), "zero");
        require(_devFundSharedPercent <= 350, "out of range"); // <= 3.5%
        require(_teamFund != address(0), "zero");
        require(_teamFundSharedPercent <= 550, "out of range"); // <= 5.5%

daoFund = _daoFund;
        daoFundSharedPercent = _daoFundSharedPercent;
        devFund = _devFund;
        devFundSharedPercent = _devFundSharedPercent;
        teamFund = _teamFund;
        teamFundSharedPercent = _teamFundSharedPercent;
    }

function setMaxDiscountRate(uint256 _maxDiscountRate) external onlyOperator {
        maxDiscountRate = _maxDiscountRate;
    }

function setMaxPremiumRate(uint256 _maxPremiumRate) external onlyOperator {
        maxPremiumRate = _maxPremiumRate;
    }

function setPremiumThreshold(uint256 _premiumThreshold) external onlyOperator {
        require(_premiumThreshold >= basedPriceCeiling, "_premiumThreshold exceeds basedPriceCeiling");
        require(_premiumThreshold <= 150, "_premiumThreshold is higher than 1.5");
        premiumThreshold = _premiumThreshold;
    }

function setPremiumPercent(uint256 _premiumPercent) external onlyOperator {
        require(_premiumPercent <= 20000, "_premiumPercent is over 200%");
        premiumPercent = _premiumPercent;
    }

/* ========== MUTABLE FUNCTIONS ========== */

function _updateBasedPrice() internal {
        try IOracle(basedOracle).update() {} catch {}
    }

function getBasedCirculatingSupply() public view returns (uint256) {
        IERC20 basedErc20 = IERC20(based);
        uint256 totalSupply = basedErc20.totalSupply();
        uint256 balanceExcluded = 0;
        for (uint8 entryId = 0; entryId < excludedFromTotalSupply.length; ++entryId) {
            balanceExcluded = balanceExcluded.add(basedErc20.balanceOf(excludedFromTotalSupply[entryId]));
        }
        return totalSupply.sub(balanceExcluded);
    }

function buyBonds(uint256 _basedAmount, uint256 targetPrice) external onlyOneBlock checkCondition checkOperator {
        require(_basedAmount > 0, "Treasury: cannot purchase bonds with zero amount");

uint256 basedPrice = getBasedPrice();
        require(basedPrice == targetPrice, "Treasury: BASED price moved");
        require(
            basedPrice < basedPriceOne, // price < $1
            "Treasury: basedPrice not eligible for bond purchase"
        );

require(_basedAmount <= epochSupplyContractionLeft, "Treasury: not enough bond left to purchase");

uint256 _rate = getBondDiscountRate();
        require(_rate > 0, "Treasury: invalid bond rate");

uint256 _bondAmount = _basedAmount.mul(_rate).div(1e18);
        uint256 basedSupply = getBasedCirculatingSupply();
        uint256 newBondSupply = IERC20(bbond).totalSupply().add(_bondAmount);
        require(newBondSupply <= basedSupply.mul(maxDebtRatioPercent).div(10000), "over max debt ratio");

IBasisAsset(based).burnFrom(msg.sender, _basedAmount);
        IBasisAsset(bbond).mint(msg.sender, _bondAmount);

epochSupplyContractionLeft = epochSupplyContractionLeft.sub(_basedAmount);
        _updateBasedPrice();

emit BoughtBonds(msg.sender, _basedAmount, _bondAmount);
    }

function redeemBonds(uint256 _bondAmount, uint256 targetPrice) external onlyOneBlock checkCondition checkOperator {
        require(_bondAmount > 0, "Treasury: cannot redeem bonds with zero amount");

uint256 basedPrice = getBasedPrice();
        require(basedPrice == targetPrice, "Treasury: BASED price moved");
        require(
            basedPrice > basedPriceCeiling, // price > $1.01
            "Treasury: basedPrice not eligible for bond purchase"
        );

uint256 _rate = getBondPremiumRate();
        require(_rate > 0, "Treasury: invalid bond rate");

uint256 _basedAmount = _bondAmount.mul(_rate).div(1e18);
        require(IERC20(based).balanceOf(address(this)) >= _basedAmount, "Treasury: treasury has no more budget");

seigniorageSaved = seigniorageSaved.sub(Math.min(seigniorageSaved, _basedAmount));

IBasisAsset(bbond).burnFrom(msg.sender, _bondAmount);
        IERC20(based).safeTransfer(msg.sender, _basedAmount);

_updateBasedPrice();

emit RedeemedBonds(msg.sender, _basedAmount, _bondAmount);
    }

function _sendToAcropolis(uint256 _amount) internal {
        IBasisAsset(based).mint(address(this), _amount);

uint256 _daoFundSharedAmount = 0;
        if (daoFundSharedPercent > 0) {
            _daoFundSharedAmount = _amount.mul(daoFundSharedPercent).div(10000);
            IERC20(based).transfer(daoFund, _daoFundSharedAmount);
            emit DaoFundFunded(block.timestamp, _daoFundSharedAmount);
        }

uint256 _devFundSharedAmount = 0;
        if (devFundSharedPercent > 0) {
            _devFundSharedAmount = _amount.mul(devFundSharedPercent).div(10000);
            IERC20(based).transfer(devFund, _devFundSharedAmount);
            emit DevFundFunded(block.timestamp, _devFundSharedAmount);
        }

uint256 _teamFundSharedAmount = 0;
        if (teamFundSharedPercent > 0) {
            _teamFundSharedAmount = _amount.mul(teamFundSharedPercent).div(10000);
            IERC20(based).transfer(teamFund, _teamFundSharedAmount);
            emit TeamFundFunded(block.timestamp, _teamFundSharedAmount);
        }

_amount = _amount.sub(_daoFundSharedAmount).sub(_devFundSharedAmount).sub(_teamFundSharedAmount);

IERC20(based).safeApprove(acropolis, 0);
        IERC20(based).safeApprove(acropolis, _amount);
        IAcropolis(acropolis).allocateSeigniorage(_amount);
        emit AcropolisFunded(block.timestamp, _amount);
    }

function governanceRecoverUnsupported(
        IERC20 _token,
        uint256 _amount,
        address _to
    ) external onlyOperator {
        // do not allow to drain core tokens
        require(address(_token) != address(based), "based");
        require(address(_token) != address(bbond), "bond");
        require(address(_token) != address(bshare), "share");
        _token.safeTransfer(_to, _amount);
    }

function acropolisSetOperator(address _operator) external onlyOperator {
        IAcropolis(acropolis).setOperator(_operator);
    }

function acropolisSetLockUp(uint256 _withdrawLockupEpochs, uint256 _rewardLockupEpochs) external onlyOperator {
        IAcropolis(acropolis).setLockUp(_withdrawLockupEpochs, _rewardLockupEpochs);
    }

function acropolisAllocateSeigniorage(uint256 amount) external onlyOperator {
        IAcropolis(acropolis).allocateSeigniorage(amount);
    }

function acropolisGovernanceRecoverUnsupported(
        address _token,
        uint256 _amount,
        address _to
    ) external onlyOperator {
        IAcropolis(acropolis).governanceRecoverUnsupported(_token, _amount, _to);
    }
}