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HOG

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contract Tomb is ERC20Burnable, Operator {

contract HOG is ERC20Burnable, Operator {

using SafeMath8 for uint8;

using SafeMath for uint256;

// Initial distribution for the first 24h genesis pools

uint256 public constant INITIAL_DAOFUND_DISTRIBUTION = 1000 ether; // 1000 HOG

uint256 public constant INITIAL_GENESIS_POOL_DISTRIBUTION = 11000 ether;

uint256 public constant GENESIS_DISTRIBUTION = 714000 ether; // 714k HOG for genesis pool

// Initial distribution for the day 2-5 TOMB-WFTM LP -> TOMB pool

uint256 public constant INITIAL_TOMB_POOL_DISTRIBUTION = 140000 ether;

// Distribution for airdrops wallet

uint256 public constant INITIAL_AIRDROP_WALLET_DISTRIBUTION = 9000 ether;

// Have the rewards been distributed to the pools

bool public rewardsDistributed = false;

bool public rewardPoolDistributed = false;

/* ================= Taxation =============== */

// Address of the Oracle

address public tombOracle;

address public hogOracle;

// Address of the Tax Office

address public taxOffice;

// Current tax rate

uint256 public taxRate;

// Price threshold below which taxes will get burned

uint256 public burnThreshold = 1.10e18;

// Address of the tax collector wallet

address public taxCollectorAddress;

// Should the taxes be calculated using the tax tiers

bool public autoCalculateTax;

// Tax Tiers

uint256[] public taxTiersTwaps = [0, 5e17, 6e17, 7e17, 8e17, 9e17, 9.5e17, 1e18, 1.05e18, 1.10e18, 1.20e18, 1.30e18, 1.40e18, 1.50e18];

uint256[] public taxTiersRates = [2000, 1900, 1800, 1700, 1600, 1500, 1500, 1500, 1500, 1400, 900, 400, 200, 100];

// Sender addresses excluded from Tax

mapping(address => bool) public excludedAddresses;

event TaxOfficeTransferred(address oldAddress, address newAddress);

modifier onlyTaxOffice() {

require(taxOffice == msg.sender, "Caller is not the tax office");

}

modifier onlyOperatorOrTaxOffice() {

require(isOperator() || taxOffice == msg.sender, "Caller is not the operator or the tax office");

}

/**

* @notice Constructs the TOMB ERC-20 contract.

* @notice Constructs the HOG ERC-20 contract.

constructor(uint256 _taxRate, address _taxCollectorAddress) public ERC20("TOMB", "TOMB") {

constructor() ERC20("HOG", "HOG") {

// Mints 1 TOMB to contract creator for initial pool setup

// Mints 200 HOG to contract creator for initial pool setup

require(_taxRate < 10000, "tax equal or bigger to 100%");

require(_taxCollectorAddress != address(0), "tax collector address must be non-zero address");

excludeAddress(address(this));

_mint(msg.sender, 1 ether);

taxRate = _taxRate;

taxCollectorAddress = _taxCollectorAddress;

}

/* ============= Taxation ============= */

function getTaxTiersTwapsCount() public view returns (uint256 count) {

return taxTiersTwaps.length;

}

function getTaxTiersRatesCount() public view returns (uint256 count) {

return taxTiersRates.length;

}

function isAddressExcluded(address _address) public view returns (bool) {

return excludedAddresses[_address];

}

function setTaxTiersTwap(uint8 _index, uint256 _value) public onlyTaxOffice returns (bool) {

require(_index >= 0, "Index has to be higher than 0");

require(_index < getTaxTiersTwapsCount(), "Index has to lower than count of tax tiers");

if (_index > 0) {

require(_value > taxTiersTwaps[_index - 1]);

}

if (_index < getTaxTiersTwapsCount().sub(1)) {

require(_value < taxTiersTwaps[_index + 1]);

}

taxTiersTwaps[_index] = _value;

return true;

}

function setTaxTiersRate(uint8 _index, uint256 _value) public onlyTaxOffice returns (bool) {

require(_index >= 0, "Index has to be higher than 0");

require(_index < getTaxTiersRatesCount(), "Index has to lower than count of tax tiers");

taxTiersRates[_index] = _value;

return true;

}

function setBurnThreshold(uint256 _burnThreshold) public onlyTaxOffice returns (bool) {

_mint(msg.sender, 200 ether);

burnThreshold = _burnThreshold;

}

function _getTombPrice() internal view returns (uint256 _tombPrice) {

function _getHogPrice() internal view returns (uint256 _hogPrice) {

try IOracle(tombOracle).consult(address(this), 1e18) returns (uint144 _price) {

try IOracle(hogOracle).consult(address(this), 1e18) returns (uint256 _price) {

return uint256(_price);

} catch {

revert("Tomb: failed to fetch TOMB price from Oracle");

revert("Hog: failed to fetch HOG price from Oracle");

}

function _updateTaxRate(uint256 _tombPrice) internal returns (uint256){

if (autoCalculateTax) {

for (uint8 tierId = uint8(getTaxTiersTwapsCount()).sub(1); tierId >= 0; --tierId) {

if (_tombPrice >= taxTiersTwaps[tierId]) {

require(taxTiersRates[tierId] < 10000, "tax equal or bigger to 100%");

taxRate = taxTiersRates[tierId];

return taxTiersRates[tierId];

}

function enableAutoCalculateTax() public onlyTaxOffice {

function setHogOracle(address _hogOracle) public onlyOperator {

autoCalculateTax = true;

require(_hogOracle != address(0), "oracle address cannot be 0 address");

}

hogOracle = _hogOracle;

function disableAutoCalculateTax() public onlyTaxOffice {

autoCalculateTax = false;

}

function setTombOracle(address _tombOracle) public onlyOperatorOrTaxOffice {

require(_tombOracle != address(0), "oracle address cannot be 0 address");

tombOracle = _tombOracle;

}

function setTaxOffice(address _taxOffice) public onlyOperatorOrTaxOffice {

require(_taxOffice != address(0), "tax office address cannot be 0 address");

emit TaxOfficeTransferred(taxOffice, _taxOffice);

taxOffice = _taxOffice;

}

function setTaxCollectorAddress(address _taxCollectorAddress) public onlyTaxOffice {

require(_taxCollectorAddress != address(0), "tax collector address must be non-zero address");

taxCollectorAddress = _taxCollectorAddress;

}

function setTaxRate(uint256 _taxRate) public onlyTaxOffice {

require(!autoCalculateTax, "auto calculate tax cannot be enabled");

require(_taxRate < 10000, "tax equal or bigger to 100%");

taxRate = _taxRate;

}

function excludeAddress(address _address) public onlyOperatorOrTaxOffice returns (bool) {

require(!excludedAddresses[_address], "address can't be excluded");

excludedAddresses[_address] = true;

return true;

}

function includeAddress(address _address) public onlyOperatorOrTaxOffice returns (bool) {

require(excludedAddresses[_address], "address can't be included");

excludedAddresses[_address] = false;

return true;

}

/**

* @notice Operator mints TOMB to a recipient

* @notice Operator mints HOG to a recipient

* @param recipient_ The address of recipient

* @param amount_ The amount of TOMB to mint to

* @param amount_ The amount of HOG to mint to

* @return whether the process has been done

function mint(address recipient_, uint256 amount_) public onlyOperator returns (bool) {

uint256 balanceBefore = balanceOf(recipient_);

_mint(recipient_, amount_);

uint256 balanceAfter = balanceOf(recipient_);

return balanceAfter > balanceBefore;

}

function burn(uint256 amount) public override {

super.burn(amount);

}

function burnFrom(address account, uint256 amount) public override onlyOperator {

super.burnFrom(account, amount);

}

function transferFrom(

address sender,

address recipient,

uint256 amount

) public override returns (bool) {

uint256 currentTaxRate = 0;

_transfer(sender, recipient, amount);

bool burnTax = false;

if (autoCalculateTax) {

uint256 currentTombPrice = _getTombPrice();

currentTaxRate = _updateTaxRate(currentTombPrice);

if (currentTombPrice < burnThreshold) {

burnTax = true;

}

if (currentTaxRate == 0 || excludedAddresses[sender]) {

_transfer(sender, recipient, amount);

} else {

_transferWithTax(sender, recipient, amount, burnTax);

}

_approve(sender, _msgSender(), allowance(sender, _msgSender()).sub(amount, "ERC20: transfer amount exceeds allowance"));

return true;

}

function _transferWithTax(

address sender,

address recipient,

uint256 amount,

bool burnTax

) internal returns (bool) {

uint256 taxAmount = amount.mul(taxRate).div(10000);

uint256 amountAfterTax = amount.sub(taxAmount);

if(burnTax) {

// Burn tax

super.burnFrom(sender, taxAmount);

} else {

// Transfer tax to tax collector

_transfer(sender, taxCollectorAddress, taxAmount);

}

// Transfer amount after tax to recipient

_transfer(sender, recipient, amountAfterTax);

return true;

}

/**

* @notice distribute to reward pool (only once)

function distributeReward(

address _genesisPool,

address _daoFund,

address _tombPool,

address _genesis

address _airdropWallet

) external onlyOperator {

require(!rewardPoolDistributed, "only can distribute once");

require(_daoFund != address(0), "!_treasury");

require(_genesisPool != address(0), "!_genesisPool");

require(_genesis != address(0), "!_genesis");

require(_tombPool != address(0), "!_tombPool");

require(!rewardsDistributed, "only can distribute once");

require(_airdropWallet != address(0), "!_airdropWallet");

rewardsDistributed = true;

rewardPoolDistributed = true;

_mint(_daoFund, INITIAL_DAOFUND_DISTRIBUTION);

_mint(_genesisPool, INITIAL_GENESIS_POOL_DISTRIBUTION);

_mint(_genesis, GENESIS_DISTRIBUTION);

_mint(_tombPool, INITIAL_TOMB_POOL_DISTRIBUTION);

_mint(_airdropWallet, INITIAL_AIRDROP_WALLET_DISTRIBUTION);

}

function governanceRecoverUnsupported(

IERC20 _token,

uint256 _amount,

address _to

) external onlyOperator {

_token.transfer(_to, _amount);

}

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contract Tomb is ERC20Burnable, Operator {
    using SafeMath8 for uint8;
    using SafeMath for uint256;

// Initial distribution for the first 24h genesis pools
    uint256 public constant INITIAL_GENESIS_POOL_DISTRIBUTION = 11000 ether;
    // Initial distribution for the day 2-5 TOMB-WFTM LP -> TOMB pool
    uint256 public constant INITIAL_TOMB_POOL_DISTRIBUTION = 140000 ether;
    // Distribution for airdrops wallet
    uint256 public constant INITIAL_AIRDROP_WALLET_DISTRIBUTION = 9000 ether;

// Have the rewards been distributed to the pools
    bool public rewardPoolDistributed = false;

/* ================= Taxation =============== */
    // Address of the Oracle
    address public tombOracle;
    // Address of the Tax Office
    address public taxOffice;

// Current tax rate
    uint256 public taxRate;
    // Price threshold below which taxes will get burned
    uint256 public burnThreshold = 1.10e18;
    // Address of the tax collector wallet
    address public taxCollectorAddress;

// Should the taxes be calculated using the tax tiers
    bool public autoCalculateTax;

// Tax Tiers
    uint256[] public taxTiersTwaps = [0, 5e17, 6e17, 7e17, 8e17, 9e17, 9.5e17, 1e18, 1.05e18, 1.10e18, 1.20e18, 1.30e18, 1.40e18, 1.50e18];
    uint256[] public taxTiersRates = [2000, 1900, 1800, 1700, 1600, 1500, 1500, 1500, 1500, 1400, 900, 400, 200, 100];

// Sender addresses excluded from Tax
    mapping(address => bool) public excludedAddresses;

event TaxOfficeTransferred(address oldAddress, address newAddress);

modifier onlyTaxOffice() {
        require(taxOffice == msg.sender, "Caller is not the tax office");
        _;
    }

modifier onlyOperatorOrTaxOffice() {
        require(isOperator() || taxOffice == msg.sender, "Caller is not the operator or the tax office");
        _;
    }

/**
     * @notice Constructs the TOMB ERC-20 contract.
     */
    constructor(uint256 _taxRate, address _taxCollectorAddress) public ERC20("TOMB", "TOMB") {
        // Mints 1 TOMB to contract creator for initial pool setup
        require(_taxRate < 10000, "tax equal or bigger to 100%");
        require(_taxCollectorAddress != address(0), "tax collector address must be non-zero address");

excludeAddress(address(this));

_mint(msg.sender, 1 ether);
        taxRate = _taxRate;
        taxCollectorAddress = _taxCollectorAddress;
    }

/* ============= Taxation ============= */

function getTaxTiersTwapsCount() public view returns (uint256 count) {
        return taxTiersTwaps.length;
    }

function getTaxTiersRatesCount() public view returns (uint256 count) {
        return taxTiersRates.length;
    }

function isAddressExcluded(address _address) public view returns (bool) {
        return excludedAddresses[_address];
    }

function setTaxTiersRate(uint8 _index, uint256 _value) public onlyTaxOffice returns (bool) {
        require(_index >= 0, "Index has to be higher than 0");
        require(_index < getTaxTiersRatesCount(), "Index has to lower than count of tax tiers");
        taxTiersRates[_index] = _value;
        return true;
    }

function setBurnThreshold(uint256 _burnThreshold) public onlyTaxOffice returns (bool) {
        burnThreshold = _burnThreshold;
    }

function _getTombPrice() internal view returns (uint256 _tombPrice) {
        try IOracle(tombOracle).consult(address(this), 1e18) returns (uint144 _price) {
            return uint256(_price);
        } catch {
            revert("Tomb: failed to fetch TOMB price from Oracle");
        }
    }

function enableAutoCalculateTax() public onlyTaxOffice {
        autoCalculateTax = true;
    }

function disableAutoCalculateTax() public onlyTaxOffice {
        autoCalculateTax = false;
    }

function setTombOracle(address _tombOracle) public onlyOperatorOrTaxOffice {
        require(_tombOracle != address(0), "oracle address cannot be 0 address");
        tombOracle = _tombOracle;
    }

function setTaxOffice(address _taxOffice) public onlyOperatorOrTaxOffice {
        require(_taxOffice != address(0), "tax office address cannot be 0 address");
        emit TaxOfficeTransferred(taxOffice, _taxOffice);
        taxOffice = _taxOffice;
    }

function setTaxCollectorAddress(address _taxCollectorAddress) public onlyTaxOffice {
        require(_taxCollectorAddress != address(0), "tax collector address must be non-zero address");
        taxCollectorAddress = _taxCollectorAddress;
    }

function setTaxRate(uint256 _taxRate) public onlyTaxOffice {
        require(!autoCalculateTax, "auto calculate tax cannot be enabled");
        require(_taxRate < 10000, "tax equal or bigger to 100%");
        taxRate = _taxRate;
    }

function excludeAddress(address _address) public onlyOperatorOrTaxOffice returns (bool) {
        require(!excludedAddresses[_address], "address can't be excluded");
        excludedAddresses[_address] = true;
        return true;
    }

function includeAddress(address _address) public onlyOperatorOrTaxOffice returns (bool) {
        require(excludedAddresses[_address], "address can't be included");
        excludedAddresses[_address] = false;
        return true;
    }

/**
     * @notice Operator mints TOMB to a recipient
     * @param recipient_ The address of recipient
     * @param amount_ The amount of TOMB to mint to
     * @return whether the process has been done
     */
    function mint(address recipient_, uint256 amount_) public onlyOperator returns (bool) {
        uint256 balanceBefore = balanceOf(recipient_);
        _mint(recipient_, amount_);
        uint256 balanceAfter = balanceOf(recipient_);

return balanceAfter > balanceBefore;
    }

function burn(uint256 amount) public override {
        super.burn(amount);
    }

function burnFrom(address account, uint256 amount) public override onlyOperator {
        super.burnFrom(account, amount);
    }

function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) public override returns (bool) {
        uint256 currentTaxRate = 0;
        bool burnTax = false;

if (autoCalculateTax) {
            uint256 currentTombPrice = _getTombPrice();
            currentTaxRate = _updateTaxRate(currentTombPrice);
            if (currentTombPrice < burnThreshold) {
                burnTax = true;
            }
        }

if (currentTaxRate == 0 || excludedAddresses[sender]) {
            _transfer(sender, recipient, amount);
        } else {
            _transferWithTax(sender, recipient, amount, burnTax);
        }

_approve(sender, _msgSender(), allowance(sender, _msgSender()).sub(amount, "ERC20: transfer amount exceeds allowance"));
        return true;
    }

function _transferWithTax(
        address sender,
        address recipient,
        uint256 amount,
        bool burnTax
    ) internal returns (bool) {
        uint256 taxAmount = amount.mul(taxRate).div(10000);
        uint256 amountAfterTax = amount.sub(taxAmount);

if(burnTax) {
            // Burn tax
            super.burnFrom(sender, taxAmount);
        } else {
            // Transfer tax to tax collector
            _transfer(sender, taxCollectorAddress, taxAmount);
        }

// Transfer amount after tax to recipient
        _transfer(sender, recipient, amountAfterTax);

return true;
    }

/**
     * @notice distribute to reward pool (only once)
     */
    function distributeReward(
        address _genesisPool,
        address _tombPool,
        address _airdropWallet
    ) external onlyOperator {
        require(!rewardPoolDistributed, "only can distribute once");
        require(_genesisPool != address(0), "!_genesisPool");
        require(_tombPool != address(0), "!_tombPool");
        require(_airdropWallet != address(0), "!_airdropWallet");
        rewardPoolDistributed = true;
        _mint(_genesisPool, INITIAL_GENESIS_POOL_DISTRIBUTION);
        _mint(_tombPool, INITIAL_TOMB_POOL_DISTRIBUTION);
        _mint(_airdropWallet, INITIAL_AIRDROP_WALLET_DISTRIBUTION);
    }

function governanceRecoverUnsupported(
        IERC20 _token,
        uint256 _amount,
        address _to
    ) external onlyOperator {
        _token.transfer(_to, _amount);
    }
}

Texto modificado

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contract HOG is ERC20Burnable, Operator {
    using SafeMath8 for uint8;
    using SafeMath for uint256;

uint256 public constant INITIAL_DAOFUND_DISTRIBUTION = 1000 ether; // 1000 HOG
    uint256 public constant GENESIS_DISTRIBUTION = 714000 ether; // 714k HOG for genesis pool

bool public rewardsDistributed = false;

// Address of the Oracle
    address public hogOracle;

/**
     * @notice Constructs the HOG ERC-20 contract.
     */
    constructor() ERC20("HOG", "HOG") {
        // Mints 200 HOG to contract creator for initial pool setup

_mint(msg.sender, 200 ether);
    }

function _getHogPrice() internal view returns (uint256 _hogPrice) {
        try IOracle(hogOracle).consult(address(this), 1e18) returns (uint256 _price) {
            return uint256(_price);
        } catch {
            revert("Hog: failed to fetch HOG price from Oracle");
        }
    }

function setHogOracle(address _hogOracle) public onlyOperator {
        require(_hogOracle != address(0), "oracle address cannot be 0 address");
        hogOracle = _hogOracle;
    }

/**
     * @notice Operator mints HOG to a recipient
     * @param recipient_ The address of recipient
     * @param amount_ The amount of HOG to mint to
     * @return whether the process has been done
     */
    function mint(address recipient_, uint256 amount_) public onlyOperator returns (bool) {
        uint256 balanceBefore = balanceOf(recipient_);
        _mint(recipient_, amount_);
        uint256 balanceAfter = balanceOf(recipient_);

return balanceAfter > balanceBefore;
    }

function burn(uint256 amount) public override {
        super.burn(amount);
    }

function burnFrom(address account, uint256 amount) public override onlyOperator {
        super.burnFrom(account, amount);
    }

function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) public override returns (bool) {
        _transfer(sender, recipient, amount);
        _approve(sender, _msgSender(), allowance(sender, _msgSender()).sub(amount, "ERC20: transfer amount exceeds allowance"));
        return true;
    }

/**
     * @notice distribute to reward pool (only once)
     */
    function distributeReward(
        address _daoFund,
        address _genesis
    ) external onlyOperator {
        require(_daoFund != address(0), "!_treasury");
        require(_genesis != address(0), "!_genesis");
        require(!rewardsDistributed, "only can distribute once");
        rewardsDistributed = true;
        _mint(_daoFund, INITIAL_DAOFUND_DISTRIBUTION);
        _mint(_genesis, GENESIS_DISTRIBUTION);
    }

function governanceRecoverUnsupported(
        IERC20 _token,
        uint256 _amount,
        address _to
    ) external onlyOperator {
        _token.transfer(_to, _amount);
    }
}