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/**
 *Submitted for verification at Etherscan.io on 2020-11-24
*/

// File: contracts/VaultParameters.sol

/*
  Copyright 2020 Unit Protocol: Artem Zakharov ([email protected]).
*/
pragma solidity ^0.7.1;


/**
 * @title Auth
 * @author Unit Protocol: Ivan Zakharov (@34x4p08)
 * @dev Manages USDP's system access
 **/
contract Auth {

    // address of the the contract with vault parameters
    VaultParameters public vaultParameters;

    constructor(address _parameters) public {
        vaultParameters = VaultParameters(_parameters);
    }

    // ensures tx's sender is a manager
    modifier onlyManager() {
        require(vaultParameters.isManager(msg.sender), "Unit Protocol: AUTH_FAILED");
        _;
    }

    // ensures tx's sender is able to modify the Vault
    modifier hasVaultAccess() {
        require(vaultParameters.canModifyVault(msg.sender), "Unit Protocol: AUTH_FAILED");
        _;
    }

    // ensures tx's sender is the Vault
    modifier onlyVault() {
        require(msg.sender == vaultParameters.vault(), "Unit Protocol: AUTH_FAILED");
        _;
    }
}


/**
 * @title VaultParameters
 * @author Unit Protocol: Ivan Zakharov (@34x4p08)
 **/
contract VaultParameters is Auth {

    // map token to stability fee percentage; 3 decimals
    mapping(address => uint) public stabilityFee;

    // map token to liquidation fee percentage, 0 decimals
    mapping(address => uint) public liquidationFee;

    // map token to USDP mint limit
    mapping(address => uint) public tokenDebtLimit;

    // permissions to modify the Vault
    mapping(address => bool) public canModifyVault;

    // managers
    mapping(address => bool) public isManager;

    // enabled oracle types
    mapping(uint => mapping (address => bool)) public isOracleTypeEnabled;

    // address of the Vault
    address payable public vault;

    // The foundation address
    address public foundation;

    /**
     * The address for an Ethereum contract is deterministically computed from the address of its creator (sender)
     * and how many transactions the creator has sent (nonce). The sender and nonce are RLP encoded and then
     * hashed with Keccak-256.
     * Therefore, the Vault address can be pre-computed and passed as an argument before deployment.
    **/
    constructor(address payable _vault, address _foundation) public Auth(address(this)) {
        require(_vault != address(0), "Unit Protocol: ZERO_ADDRESS");
        require(_foundation != address(0), "Unit Protocol: ZERO_ADDRESS");

        isManager[msg.sender] = true;
        vault = _vault;
        foundation = _foundation;
    }

    /**
     * @notice Only manager is able to call this function
     * @dev Grants and revokes manager's status of any address
     * @param who The target address
     * @param permit The permission flag
     **/
    function setManager(address who, bool permit) external onlyManager {
        isManager[who] = permit;
    }

    /**
     * @notice Only manager is able to call this function
     * @dev Sets the foundation address
     * @param newFoundation The new foundation address
     **/
    function setFoundation(address newFoundation) external onlyManager {
        require(newFoundation != address(0), "Unit Protocol: ZERO_ADDRESS");
        foundation = newFoundation;
    }

    /**
     * @notice Only manager is able to call this function
     * @dev Sets ability to use token as the main collateral
     * @param asset The address of the main collateral token
     * @param stabilityFeeValue The percentage of the year stability fee (3 decimals)
     * @param liquidationFeeValue The liquidation fee percentage (0 decimals)
     * @param usdpLimit The USDP token issue limit
     * @param oracles The enables oracle types
     **/
    function setCollateral(
        address asset,
        uint stabilityFeeValue,
        uint liquidationFeeValue,
        uint usdpLimit,
        uint[] calldata oracles
    ) external onlyManager {
        setStabilityFee(asset, stabilityFeeValue);
        setLiquidationFee(asset, liquidationFeeValue);
        setTokenDebtLimit(asset, usdpLimit);
        for (uint i=0; i < oracles.length; i++) {
            setOracleType(oracles[i], asset, true);
        }
    }

    /**
     * @notice Only manager is able to call this function
     * @dev Sets a permission for an address to modify the Vault
     * @param who The target address
     * @param permit The permission flag
     **/
    function setVaultAccess(address who, bool permit) external onlyManager {
        canModifyVault[who] = permit;
    }

    /**
     * @notice Only manager is able to call this function
     * @dev Sets the percentage of the year stability fee for a particular collateral
     * @param asset The address of the main collateral token
     * @param newValue The stability fee percentage (3 decimals)
     **/
    function setStabilityFee(address asset, uint newValue) public onlyManager {
        stabilityFee[asset] = newValue;
    }

    /**
     * @notice Only manager is able to call this function
     * @dev Sets the percentage of the liquidation fee for a particular collateral
     * @param asset The address of the main collateral token
     * @param newValue The liquidation fee percentage (0 decimals)
     **/
    function setLiquidationFee(address asset, uint newValue) public onlyManager {
        require(newValue <= 100, "Unit Protocol: VALUE_OUT_OF_RANGE");
        liquidationFee[asset] = newValue;
    }

    /**
     * @notice Only manager is able to call this function
     * @dev Enables/disables oracle types
     * @param _type The type of the oracle
     * @param asset The address of the main collateral token
     * @param enabled The control flag
     **/
    function setOracleType(uint _type, address asset, bool enabled) public onlyManager {
        isOracleTypeEnabled[_type][asset] = enabled;
    }

    /**
     * @notice Only manager is able to call this function
     * @dev Sets USDP limit for a specific collateral
     * @param asset The address of the main collateral token
     * @param limit The limit number
     **/
    function setTokenDebtLimit(address asset, uint limit) public onlyManager {
        tokenDebtLimit[asset] = limit;
    }
}

// File: contracts/helpers/SafeMath.sol

/*
  Copyright 2020 Unit Protocol: Artem Zakharov ([email protected]).
*/
pragma solidity ^0.7.1;


/**
 * @title SafeMath
 * @dev Math operations with safety checks that throw on error
 */
library SafeMath {

    /**
    * @dev Multiplies two numbers, throws on overflow.
    */
    function mul(uint256 a, uint256 b) internal pure returns (uint256 c) {
        if (a == 0) {
            return 0;
        }
        c = a * b;
        assert(c / a == b);
        return c;
    }

    /**
    * @dev Integer division of two numbers, truncating the quotient.
    */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b != 0, "SafeMath: division by zero");
        return a / b;
    }

    /**
    * @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
    */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        assert(b <= a);
        return a - b;
    }

    /**
    * @dev Adds two numbers, throws on overflow.
    */
    function add(uint256 a, uint256 b) internal pure returns (uint256 c) {
        c = a + b;
        assert(c >= a);
        return c;
    }
}

// File: contracts/USDP.sol

/*
  Copyright 2020 Unit Protocol: Artem Zakharov ([email protected]).
*/
pragma solidity ^0.7.1;




/**
 * @title USDP token implementation
 * @author Unit Protocol: Ivan Zakharov (@34x4p08)
 * @dev ERC20 token
 **/
contract USDP is Auth {
    using SafeMath for uint;

    // name of the token
    string public constant name = "USDP Stablecoin";

    // symbol of the token
    string public constant symbol = "USDP";

    // version of the token
    string public constant version = "1";

    // number of decimals the token uses
    uint8 public constant decimals = 18;

    // total token supply
    uint public totalSupply;

    // balance information map
    mapping(address => uint) public balanceOf;

    // token allowance mapping
    mapping(address => mapping(address => uint)) public allowance;

    /**
     * @dev Trigger on any successful call to approve(address spender, uint amount)
    **/
    event Approval(address indexed owner, address indexed spender, uint value);

    /**
     * @dev Trigger when tokens are transferred, including zero value transfers
    **/
    event Transfer(address indexed from, address indexed to, uint value);

    /**
      * @param _parameters The address of system parameters contract
     **/
    constructor(address _parameters) public Auth(_parameters) {}

    /**
      * @notice Only Vault can mint USDP
      * @dev Mints 'amount' of tokens to address 'to', and MUST fire the
      * Transfer event
      * @param to The address of the recipient
      * @param amount The amount of token to be minted
     **/
    function mint(address to, uint amount) external onlyVault {
        require(to != address(0), "Unit Protocol: ZERO_ADDRESS");

        balanceOf[to] = balanceOf[to].add(amount);
        totalSupply = totalSupply.add(amount);

        emit Transfer(address(0), to, amount);
    }

    /**
      * @notice Only manager can burn tokens from manager's balance
      * @dev Burns 'amount' of tokens, and MUST fire the Transfer event
      * @param amount The amount of token to be burned
     **/
    function burn(uint amount) external onlyManager {
        _burn(msg.sender, amount);
    }

    /**
      * @notice Only Vault can burn tokens from any balance
      * @dev Burns 'amount' of tokens from 'from' address, and MUST fire the Transfer event
      * @param from The address of the balance owner
      * @param amount The amount of token to be burned
     **/
    function burn(address from, uint amount) external onlyVault {
        _burn(from, amount);
    }

    /**
      * @dev Transfers 'amount' of tokens to address 'to', and MUST fire the Transfer event. The
      * function SHOULD throw if the _from account balance does not have enough tokens to spend.
      * @param to The address of the recipient
      * @param amount The amount of token to be transferred
     **/
    function transfer(address to, uint amount) external returns (bool) {
        return transferFrom(msg.sender, to, amount);
    }

    /**
      * @dev Transfers 'amount' of tokens from address 'from' to address 'to', and MUST fire the
      * Transfer event
      * @param from The address of the sender
      * @param to The address of the recipient
      * @param amount The amount of token to be transferred
     **/
    function transferFrom(address from, address to, uint amount) public returns (bool) {
        require(to != address(0), "Unit Protocol: ZERO_ADDRESS");
        require(balanceOf[from] >= amount, "Unit Protocol: INSUFFICIENT_BALANCE");

        if (from != msg.sender) {
            require(allowance[from][msg.sender] >= amount, "Unit Protocol: INSUFFICIENT_ALLOWANCE");
            _approve(from, msg.sender, allowance[from][msg.sender].sub(amount));
        }
        balanceOf[from] = balanceOf[from].sub(amount);
        balanceOf[to] = balanceOf[to].add(amount);

        emit Transfer(from, to, amount);
        return true;
    }

    /**
      * @dev Allows 'spender' to withdraw from your account multiple times, up to the 'amount' amount. If
      * this function is called again it overwrites the current allowance with 'amount'.
      * @param spender The address of the account able to transfer the tokens
      * @param amount The amount of tokens to be approved for transfer
     **/
    function approve(address spender, uint amount) external returns (bool) {
        _approve(msg.sender, spender, amount);
        return true;
    }

    /**
     * @dev Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to `approve` that can be used as a mitigation for
     * problems described in `IERC20.approve`.
     *
     * Emits an `Approval` event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint addedValue) public virtual returns (bool) {
        _approve(msg.sender, spender, allowance[msg.sender][spender].add(addedValue));
        return true;
    }

    /**
     * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to `approve` that can be used as a mitigation for
     * problems described in `IERC20.approve`.
     *
     * Emits an `Approval` event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint subtractedValue) public virtual returns (bool) {
        _approve(msg.sender, spender, allowance[msg.sender][spender].sub(subtractedValue));
        return true;
    }

    function _approve(address owner, address spender, uint amount) internal virtual {
        require(owner != address(0), "Unit Protocol: approve from the zero address");
        require(spender != address(0), "Unit Protocol: approve to the zero address");

        allowance[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    function _burn(address from, uint amount) internal virtual {
        balanceOf[from] = balanceOf[from].sub(amount);
        totalSupply = totalSupply.sub(amount);

        emit Transfer(from, address(0), amount);
    }
}

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000000000000000000000000b46f8cf42e504efe8bef895f848741daa55e9f1d

-----Decoded View---------------
Arg [0] : _parameters (address): 0xB46F8CF42e504Efe8BEf895f848741daA55e9f1D

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 000000000000000000000000b46f8cf42e504efe8bef895f848741daa55e9f1d

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ipfs://6725cb1bab781f2cc17b3f898bbc0b018227f4cd11306bf4e13d265b16601034