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// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.7.6;

import "tinlake-erc20/erc20.sol";

interface MemberlistLike {
    function hasMember(address) external view returns (bool);
    function member(address) external;
}

/// @notice RestrictedERC20 token only member with a valid (not expired) membership should be allowed to receive tokens
contract RestrictedToken is ERC20 {
    MemberlistLike public memberlist;

    modifier checkMember(address usr) {
        memberlist.member(usr);
        _;
    }

    /// @notice returns true if an address is a member
    /// @param usr the address of the user which should be a member
    /// @return isMember true if the user is a member
    function hasMember(address usr) public view returns (bool isMember) {
        return memberlist.hasMember(usr);
    }

    constructor(string memory symbol_, string memory name_) ERC20(symbol_, name_) {}

    /// @notice sets the dependency to another contract
    /// @param contractName the name of the dependency contract
    /// @param addr the address of the dependency contract
    function depend(bytes32 contractName, address addr) public auth {
        if (contractName == "memberlist") memberlist = MemberlistLike(addr);
        else revert();
    }

    /// @notice transferFrom is only possible if receiver is a member
    /// @param from the address of the sender
    /// @param to the address of the receiver
    /// @param amount the amount of tokens to transfer
    function transferFrom(address from, address to, uint256 amount) public override checkMember(to) returns (bool) {
        return super.transferFrom(from, to, amount);
    }
}

// SPDX-License-Identifier: AGPL-3.0-only
// Copyright (C) 2017, 2018, 2019 dbrock, rain, mrchico, lucasvo
pragma solidity >=0.7.0;

contract ERC20 {
    // --- Auth ---
    mapping (address => uint) public wards;
    function rely(address usr) public auth { wards[usr] = 1; }
    function deny(address usr) public auth { wards[usr] = 0; }
    modifier auth { require(wards[msg.sender] == 1); _; }

    // --- ERC20 Data ---
    uint8   public constant decimals = 18;
    string  public name;
    string  public symbol;
    string  public constant version = "1";
    uint256 public totalSupply;

    bytes32 public DOMAIN_SEPARATOR;
    // keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");
    bytes32 public constant PERMIT_TYPEHASH = 0x6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9;
    mapping(address => uint) public nonces;

    mapping (address => uint)                      public balanceOf;
    mapping (address => mapping (address => uint)) public allowance;

    event Approval(address indexed src, address indexed usr, uint wad);
    event Transfer(address indexed src, address indexed dst, uint wad);

    // --- Math ---
    function safeAdd_(uint x, uint y) internal pure returns (uint z) {
        require((z = x + y) >= x, "math-add-overflow");
    }
    function safeSub_(uint x, uint y) internal pure returns (uint z) {
        require((z = x - y) <= x, "math-sub-underflow");
    }

    constructor(string memory symbol_, string memory name_) {
        wards[msg.sender] = 1;
        symbol = symbol_;
        name = name_;

        uint chainId;
        assembly {
            chainId := chainid()
        }
        DOMAIN_SEPARATOR = keccak256(
            abi.encode(
                keccak256('EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)'),
                keccak256(bytes(name)),
                keccak256(bytes(version)),
                chainId,
                address(this)
            )
        );
    }

    // --- ERC20 ---
    function transfer(address dst, uint wad) external returns (bool) {
        return transferFrom(msg.sender, dst, wad);
    }
    function transferFrom(address src, address dst, uint wad)
        public virtual returns (bool)
    {
        require(balanceOf[src] >= wad, "cent/insufficient-balance");
        if (src != msg.sender && allowance[src][msg.sender] != type(uint256).max) {
            require(allowance[src][msg.sender] >= wad, "cent/insufficient-allowance");
            allowance[src][msg.sender] = safeSub_(allowance[src][msg.sender], wad);
        }
        balanceOf[src] = safeSub_(balanceOf[src], wad);
        balanceOf[dst] = safeAdd_(balanceOf[dst], wad);
        emit Transfer(src, dst, wad);
        return true;
    }
    function mint(address usr, uint wad) external virtual auth {
        balanceOf[usr] = safeAdd_(balanceOf[usr], wad);
        totalSupply    = safeAdd_(totalSupply, wad);
        emit Transfer(address(0), usr, wad);
    }
    function burn(address usr, uint wad) public {
        require(balanceOf[usr] >= wad, "cent/insufficient-balance");
        if (usr != msg.sender && allowance[usr][msg.sender] != type(uint256).max) {
            require(allowance[usr][msg.sender] >= wad, "cent/insufficient-allowance");
            allowance[usr][msg.sender] = safeSub_(allowance[usr][msg.sender], wad);
        }
        balanceOf[usr] = safeSub_(balanceOf[usr], wad);
        totalSupply    = safeSub_(totalSupply, wad);
        emit Transfer(usr, address(0), wad);
    }
    function approve(address usr, uint wad) external returns (bool) {
        allowance[msg.sender][usr] = wad;
        emit Approval(msg.sender, usr, wad);
        return true;
    }

    // --- Alias ---
    function push(address usr, uint wad) external {
        transferFrom(msg.sender, usr, wad);
    }
    function pull(address usr, uint wad) external {
        transferFrom(usr, msg.sender, wad);
    }
    function move(address src, address dst, uint wad) external {
        transferFrom(src, dst, wad);
    }
    function burnFrom(address usr, uint wad) external {
        burn(usr, wad);
    }

    // --- Approve by signature ---
    function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external {
        require(deadline >= block.timestamp, 'cent/past-deadline');
        bytes32 digest = keccak256(
            abi.encodePacked(
                '\x19\x01',
                DOMAIN_SEPARATOR,
                keccak256(abi.encode(PERMIT_TYPEHASH, owner, spender, value, nonces[owner]++, deadline))
            )
        );
        address recoveredAddress = ecrecover(digest, v, r, s);
        require(recoveredAddress != address(0) && recoveredAddress == owner, 'cent-erc20/invalid-sig');
        allowance[owner][spender] = value;
        emit Approval(owner, spender, value);
    }
}

{
  "remappings": [
    "ds-test/=lib/forge-std/lib/ds-test/src/",
    "forge-std/=lib/forge-std/src/",
    "tinlake-auth/=lib/tinlake-auth/src/",
    "tinlake-erc20/=lib/tinlake-erc20/src/",
    "tinlake-math/=lib/tinlake-math/src/",
    "tinlake-title/=lib/tinlake-title/src/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "istanbul",
  "libraries": {}
}

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MemberlistLike","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"usr","type":"address"},{"internalType":"uint256","name":"wad","type":"uint256"}],"name":"mint","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"src","type":"address"},{"internalType":"address","name":"dst","type":"address"},{"internalType":"uint256","name":"wad","type":"uint256"}],"name":"move","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"nonces","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"permit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"usr","type":"address"},{"internalType":"uint256","name":"wad","type":"uint256"}],"name":"pull","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"usr","type":"address"},{"internalType":"uint256","name":"wad","type":"uint256"}],"name":"push","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"usr","type":"address"}],"name":"rely","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"dst","type":"address"},{"internalType":"uint256","name":"wad","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"version","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"wards","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"}]

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