Contract

Contract Source Code (Solidity)

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Outline

•    - function modifyCollateralBalance(byte ...
•    - function decimals()
•    - function transfer(address,uint)
•    - function transferFrom(address,address ...
•  contract CollateralJoin1 *
•    - function addAuthorization(address acc ...
•    - function removeAuthorization(address ...
•    - function addition(uint x, int y)
•    - function disableContract()
•    - function join(address usr, uint wad)
•    - function exit(address usr, uint wad)

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/**
 *Submitted for verification at Etherscan.io on 2020-10-26
*/

/// AdvancedTokenAdapters.sol

// Copyright (C) 2018 Rain <[email protected]>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.

pragma solidity ^0.6.7;

abstract contract SAFEEngineLike {
    function modifyCollateralBalance(bytes32,address,int) virtual public;
}

// CollateralJoin1
abstract contract CollateralLike {
    function decimals() virtual public view returns (uint);
    function transfer(address,uint) virtual public returns (bool);
    function transferFrom(address,address,uint) virtual public returns (bool);
}

contract CollateralJoin1 {
    // --- Auth ---
    mapping (address => uint) public authorizedAccounts;
    /**
     * @notice Add auth to an account
     * @param account Account to add auth to
     */
    function addAuthorization(address account) external isAuthorized {
        authorizedAccounts[account] = 1;
        emit AddAuthorization(account);
    }
    /**
     * @notice Remove auth from an account
     * @param account Account to remove auth from
     */
    function removeAuthorization(address account) external isAuthorized {
        authorizedAccounts[account] = 0;
        emit RemoveAuthorization(account);
    }
    /**
    * @notice Checks whether msg.sender can call an authed function
    **/
    modifier isAuthorized {
        require(authorizedAccounts[msg.sender] == 1, "CollateralJoin1/account-not-authorized");
        _;
    }

    SAFEEngineLike public safeEngine;
    bytes32 public collateralType;
    CollateralLike public collateral;
    uint    public decimals;
    uint    public contractEnabled;  // Access Flag

    // --- Events ---
    event AddAuthorization(address account);
    event RemoveAuthorization(address account);
    event DisableContract();
    event Join(address sender, address usr, uint wad);
    event Exit(address sender, address usr, uint wad);

    constructor(address safeEngine_, bytes32 collateralType_, address collateral_) public {
        authorizedAccounts[msg.sender] = 1;
        contractEnabled = 1;
        safeEngine = SAFEEngineLike(safeEngine_);
        collateralType = collateralType_;
        collateral = CollateralLike(collateral_);
        decimals = collateral.decimals();
        emit AddAuthorization(msg.sender);
    }

    // --- Math ---
    function addition(uint x, int y) internal pure returns (uint z) {
        z = x + uint(y);
        require(y >= 0 || z <= x);
        require(y <= 0 || z >= x);
    }

    // --- Administration ---
    function disableContract() external isAuthorized {
        contractEnabled = 0;
        emit DisableContract();
    }

    // --- Collateral Gateway ---
    function join(address usr, uint wad) external {
        require(contractEnabled == 1, "CollateralJoin1/not-contractEnabled");
        require(int(wad) >= 0, "CollateralJoin1/overflow");
        safeEngine.modifyCollateralBalance(collateralType, usr, int(wad));
        require(collateral.transferFrom(msg.sender, address(this), wad), "CollateralJoin1/failed-transfer");
        emit Join(msg.sender, usr, wad);
    }
    function exit(address usr, uint wad) external {
        require(wad <= 2 ** 255, "CollateralJoin1/overflow");
        safeEngine.modifyCollateralBalance(collateralType, msg.sender, -int(wad));
        require(collateral.transfer(usr, wad), "CollateralJoin1/failed-transfer");
        emit Exit(msg.sender, usr, wad);
    }
}

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[{"inputs":[{"internalType":"address","name":"safeEngine_","type":"address"},{"internalType":"bytes32","name":"collateralType_","type":"bytes32"},{"internalType":"address","name":"collateral_","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"account","type":"address"}],"name":"AddAuthorization","type":"event"},{"anonymous":false,"inputs":[],"name":"DisableContract","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"sender","type":"address"},{"indexed":false,"internalType":"address","name":"usr","type":"address"},{"indexed":false,"internalType":"uint256","name":"wad","type":"uint256"}],"name":"Exit","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"sender","type":"address"},{"indexed":false,"internalType":"address","name":"usr","type":"address"},{"indexed":false,"internalType":"uint256","name":"wad","type":"uint256"}],"name":"Join","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"account","type":"address"}],"name":"RemoveAuthorization","type":"event"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"addAuthorization","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"authorizedAccounts","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"collateral","outputs":[{"internalType":"contract CollateralLike","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"collateralType","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"contractEnabled","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"disableContract","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"usr","type":"address"},{"internalType":"uint256","name":"wad","type":"uint256"}],"name":"exit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"usr","type":"address"},{"internalType":"uint256","name":"wad","type":"uint256"}],"name":"join","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"removeAuthorization","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"safeEngine","outputs":[{"internalType":"contract SAFEEngineLike","name":"","type":"address"}],"stateMutability":"view","type":"function"}]

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000000000000000000000000f0b7808b940b78be81ad6f9e075ce8be4a837e2c4554482d41000000000000000000000000000000000000000000000000000000000000000000000000000000c02aaa39b223fe8d0a0e5c4f27ead9083c756cc2

-----Decoded View---------------
Arg [0] : safeEngine_ (address): 0xf0b7808b940b78bE81ad6F9E075Ce8be4A837E2c
Arg [1] : collateralType_ (bytes32): 0x4554482d41000000000000000000000000000000000000000000000000000000
Arg [2] : collateral_ (address): 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2

-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 000000000000000000000000f0b7808b940b78be81ad6f9e075ce8be4a837e2c
Arg [1] : 4554482d41000000000000000000000000000000000000000000000000000000
Arg [2] : 000000000000000000000000c02aaa39b223fe8d0a0e5c4f27ead9083c756cc2

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ipfs://b5ce72c22b15815240080a6b7ab0e64f3324794d43d7d44468e4cca4f13bd4d1