Contract

0x151D09F1BeE785b1B9235Ba432A1855b9A2A8a77

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$0.00

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0xA3bd825B...660A81Dab at txn 0x8a5c5460ba27d7b0825536dd1f390b27ea93715cf4d66783054072c8de458724

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Latest 1 from a total of 1 transactions

	Transaction Hash	Method	Block		From		To
	0x0b1eccea32329f2f6533ff5c2e8bb126ce5cb6ed71bb4630f410b6af4aa4ce95	Set Vault Addres...	Set Vault Addres...	11305514	2020-11-22 3:12:38	1589 days ago	1606014758	0xA3bd825B...660A81Dab	IN	0x151D09F1...b9A2A8a77	0 ETH$0.00	0.00152208	35

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Contract Source Code Verified (Exact Match)

Contract Name:

Approver

Compiler Version

v0.6.6+commit.6c089d02

Optimization Enabled:

Yes with 200 runs

Other Settings:

default evmVersion, None license

Contract Source Code (Solidity)

IDE

/**
 *Submitted for verification at Etherscan.io on 2020-11-22
*/

pragma solidity >=0.6.2;


///////////////////////////////////////////////////////////////////////
///							   Libraries							///
///////////////////////////////////////////////////////////////////////
library SafeMath {

    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");
        return c;}

    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return sub(a, b, "SafeMath: subtraction overflow");}

    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;
        return c;}

    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a == 0) {return 0;}
        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");
        return c;}

    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");}

    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        uint256 c = a / b;
        return c;}

    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return mod(a, b, "SafeMath: modulo by zero");}

    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;}
}


library Math {
	function max(uint x, uint y) internal pure returns (uint z) {
        z = x < y ? y : x;
    }

	function min(uint x, uint y) internal pure returns (uint z) {
        z = x < y ? x : y;
    }

    // babylonian method (https://en.wikipedia.org/wiki/Methods_of_computing_square_roots#Babylonian_method)
    function sqrt(uint y) internal pure returns (uint z) {
        if (y > 3) {
            z = y;
            uint x = y / 2 + 1;
            while (x < z) {
                z = x;
                x = (y / x + x) / 2;
            }
        } else if (y != 0) {
            z = 1;
        }
    }
}


///////////////////////////////////////////////////////////////////////
///							  Interfaces							///
///////////////////////////////////////////////////////////////////////

interface IERC20 {
	event Approval(address indexed owner, address indexed spender, uint value);
    event Transfer(address indexed from, address indexed to, uint value);

    function name() external view returns (string memory);
    function symbol() external view returns (string memory);
    function decimals() external view returns (uint8);
    function totalSupply() external view returns (uint);
    function balanceOf(address owner) external view returns (uint);
    function allowance(address owner, address spender) external view returns (uint);

    function approve(address spender, uint value) external returns (bool);
    function transfer(address to, uint value) external returns (bool);
    function transferFrom(address from, address to, uint value) external returns (bool);
}


abstract contract Context {
    function _msgSender() internal view virtual returns (address payable) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}



///////////////////////////////////////////////////////////////////////
///						   Approver Contract						///
///////////////////////////////////////////////////////////////////////
contract Approver is Context {
    using SafeMath for uint256;

    mapping (address => uint256) public expLpAllowances;
    uint256 public expLpTotal;

     address internal constant WETHxEXP = 0x015Ee710300E80b0c8430a6eb0E8680F25BF2a7f;

    address public immutable ADMIN_ADDRESS;

    constructor () public {

        ADMIN_ADDRESS = msg.sender;

        //set allowances
        expLpAllowances[address(0xdC19Aff81AcE5E295267bc24f2975Bcf1DEd40dC)] = 116582199079856208;
        expLpAllowances[address(0x894808E2B4dBB8af32a8A0b33800218835df79e3)] = 116582199079856208;
        expLpAllowances[address(0x2D40e6CFF578871980A7377885DCdC9f8e534D59)] = 233164398159712416;
        expLpAllowances[address(0xe181cd64CdBdF34c39cE7F55f49AC069d1B94262)] = 233164398159712416;
        expLpAllowances[address(0x9A9fECad7a9D3145181e59f2B0E2F27BA913A863)] = 116582199079856208;
        expLpAllowances[address(0x9dBFCF31baC3636A731C49eCdAA91531025a164b)] = 466328796319424832;
        expLpAllowances[address(0x33F0Ef226d443bC0bae66b452F919f244163dC08)] = 466328796319424832;
        expLpAllowances[address(0x8EDAB1576B34b0BFdcdF4F368eFDE5200ff6F4e8)] = 326430157423597376;
        expLpAllowances[address(0x3fa9F1ac66FFCC5704a2EAEEe86975C6bFB3A2cd)] = 139898638895827456;
        expLpAllowances[address(0xCbC23ed3E05e767fb93877299118084c7943D6e4)] = 69949319447913728;
        expLpAllowances[address(0xFC527e222254F7fd7451853a18c77935b582f9dB)] = 349746597239568640;
        expLpAllowances[address(0xeBFf30F569222c8fe4B9e1102Bd943576bF62D5f)] = 233164398159712416;
        expLpAllowances[address(0xbCC44956d70536bed17C146a4D9E66261BB701DD)] = 466328796319424832;
        expLpAllowances[address(0x4c9C3626Cf1828Da7b58a50DC2F6AA2C4546609e)] = 58291099539928104;
        expLpAllowances[address(0x8375A41C445df074709eEFA1F4AEfEE5B8b15c59)] = 466328796319424832;
        expLpAllowances[address(0x62A32ea089109e7b8f0fE29d839736DDB0C753F6)] = 466328796319424832;
        expLpAllowances[address(0x1bAb572ea3a00Acf701f4D503e593F3B988856d8)] = 466328796319424832;
        expLpAllowances[address(0xCd993Dcb50cc7d6Daab807230F4Dd7a3a36d6C22)] = 466328796319424832;
        expLpAllowances[address(0x758c32D2F0B32D3e0EA1e8D0D24696fe9B69D148)] = 466328796319424832;
        expLpAllowances[address(0x398eae62677A5aB84122E18E2b2F86a970b6f75d)] = 466328796319424832;
        expLpAllowances[address(0x5EfA2d42e6815DfD4C528bF9c9343F24A05D7f1C)] = 466328796319424832;
        expLpAllowances[address(0x6e6b30AF6d8CcE0e156D64D8eddba80842d6fC31)] = 443012356503453568;
        expLpAllowances[address(0x566DEffc17EF08f1Ec7d559D65704f865F8C4a0D)] = 466328796319424832;
        expLpAllowances[address(0x9dED136C7A66A31d39f546e7c186609bed12089E)] = 466328796319424832;
        expLpAllowances[address(0xF12657e7A1e2320b85b2Dd10C5F047eB14F02517)] = 466328796319424832;
        expLpAllowances[address(0xDa22F5773603426AFf614FF788756dB655CB9E12)] = 466328796319424832;
        expLpAllowances[address(0x165f80e98B36ddb9e9E0Db1D5d407f9D4CbD2371)] = 466328796319424832;
        expLpAllowances[address(0x0bbD66238b552398E64E1E9D6497379Db8C352cb)] = 466328796319424832;
        expLpAllowances[address(0x9630fb9CbC3eB2e5c442fD2eE48E5D9C8856ae44)] = 466328796319424832;
        expLpAllowances[address(0x0bf3d045D9247AaC601F47235caEe8174EAF854F)] = 116582199079856208;
        expLpAllowances[address(0xD596d58285BdDE7cBF4070f448E92F9aa69e329C)] = 233164398159712416;
        expLpAllowances[address(0xdbDA2dD2888740767154485c485c4a0Df5120A3d)] = 46632879631942488;
        expLpAllowances[address(0xB4Cb303E4b3b34F626bF3304521E8B157A237Dd7)] = 69949319447913728;
        expLpAllowances[address(0x952c23f8F067A5e7e165ff0E42491f51D87DBc95)] = 233164398159712416;
        expLpAllowances[address(0x3A409EfF50A47aEeF294E3f0BB3874490dD99abc)] = 466328796319424832;
        expLpAllowances[address(0x75B318B2AD119838Af79F7052A67EA649aC700dF)] = 128240418987841824;
        expLpAllowances[address(0x8Fe9C787995D12b6EF3a9448aA944593DaC93C6c)] = 58103718536968352;
        expLpAllowances[address(0x740B097AF71f55ab430B870b1aED9b4E00140460)] = 7260003354251993;
        expLpAllowances[address(0x052D4Fbf9357689b3b8aF529d4f6Fac97a8f436C)] = 72848264014350368;
        expLpAllowances[address(0xC8D37cE5761aC85D14F160C3aaa2d6e0bc3DC359)] = 15614274769852304;
        expLpAllowances[address(0xC390baa7CA9740C9b1596D3F61d51132D61c66Aa)] = 14862090974167356;
        expLpAllowances[address(0x9591f5D9061a6280691eAC12Dc7562E4c844B565)] = 29306000869885268;
        expLpAllowances[address(0xF00aeA879FEc57C08F2739E5ba89B455942C7d4e)] = 1182307439853353;
        expLpAllowances[address(0xA17b91BdDcE741528fDDF8E5738A767B3053ac18)] = 17429699919347148;
        expLpAllowances[address(0xa9F245Fb512C6d2fBd5E1085af87020FdF7D1BBd)] = 26873723594382772;
        expLpAllowances[address(0xA11a93b057ADFa32c9b38f68ac48Ba3938812331)] = 6589706101829668;
        expLpAllowances[address(0xC7B5d5d41295e39ce33b2b20feCE12F052B6710e)] = 2229411656463131;
        expLpAllowances[address(0xAAdeC7c10842de8E62ce4FaEd9314AaD09A367D1)] = 2182019546314342;
        expLpAllowances[address(0xD2F3Dc6CA0B917fB1BfCaD4b6570a39983eEE4db)] = 21687962044039856;
        expLpAllowances[address(0xe1cD19D059cE0a47B285F85c29fccd59fBb69853)] = 4124426955917707;
        expLpAllowances[address(0xD3f11Fa172A7723D91770A8321C1cf409531bF3B)] = 2011174118535889;
        expLpAllowances[address(0x9A857D68E598787E0Dbb8aa3c2B61dA709C083dE)] = 1004064309018416;
        expLpAllowances[address(0x0723fF2d0F410319caFB6627e97a55d8AC17077F)] = 20732254874637924;
        expLpAllowances[address(0x3b1000cE4f9501C537AC42658b407bb57139cB54)] = 4581837392200263;
        expLpAllowances[address(0x49566F7335C0228484A030C0924fFACC4903CcEE)] = 18095407954324680;
        expLpAllowances[address(0x7495e20fE8F3aE370c4d98f89daa59fB7956006F)] = 9944907443539016;
        expLpAllowances[address(0x1CB4831B6dF1d9cB07279b93a0E101DB9B2295D0)] = 18895261968838852;
        expLpAllowances[address(0x9F975F77c016E84987f3eeE177463E442D0320DA)] = 18698994346077696;
        expLpAllowances[address(0xEd72Bb9086D1B6e325FFBcb293A2E4365790dd9e)] = 20422032167052816;
        expLpAllowances[address(0x529771885770a756eaAb634F68B61495687D3156)] = 7059805366522799;
        expLpAllowances[address(0x4d822a8cEde7b180215D95eb968d6FDcF288560d)] = 19667503648613168;
        expLpAllowances[address(0x77CB8c64e42ea076594A0C1E08115D8444Fa9fAc)] = 415299268947027;
        expLpAllowances[address(0xe9d571949669c530690f2879A3a653f0b5f9f168)] = 456668637669976192;
        expLpAllowances[address(0x82602a683BB9eccA55d0cA772Cac631d5417489D)] = 23324590485719084;
        expLpAllowances[address(0x6B0CFBA6667A8D04C04e511371a742bc66799Dd7)] = 660435526728169;
        expLpAllowances[address(0x106f6651Eb3Dbf96952524d6176618aB9D8DD27C)] = 13142693497146968;
        expLpAllowances[address(0xaD09A17c48921D9DCeD1DC86E9F0aE610Ddf0514)] = 489199155901513;
        expLpAllowances[address(0xd0103edA26ee0e8911b9F3C1a96E33980c7Ee042)] = 4505017946198619;
        expLpAllowances[address(0xA33a8b1171941B4Eb04A57605dCcDeffd4860EB8)] = 6003647629672430;
        expLpAllowances[address(0xD55c63fc94c2246e6265191D4a80403F1A43fF24)] = 7365743024149646;
        expLpAllowances[address(0x7f7eEfB0b18f4D6DBf078eC8eC0B08A7f64D77E8)] = 10017463729110036;
        expLpAllowances[address(0xA11ab4E97d862833167e5C1C72f49E46FF97Aa99)] = 32954782917923700;
        expLpAllowances[address(0x86Db26D8668C99e696922f62C90530143697D99B)] = 3496457219717707;
        expLpAllowances[address(0x491fBace93352CB63278218eC57DaE98C0795ad4)] = 17004552667591900;
        expLpAllowances[address(0x1a93c570251ec9cE34216AF5EEe618097026bd06)] = 6930048466356487;
        expLpAllowances[address(0x4eD9c6193ede88A5D41b2E833E46508800420780)] = 76124086917172144;
        expLpAllowances[address(0x318f85f96076C2b61Ff04302B46d0079146509Df)] = 304602862918484864;
        expLpAllowances[address(0x9731b1BA46Fad438D3cb960dD965e4D785e48A01)] = 266777067106253248;
        expLpAllowances[address(0x3238B53A910B69f5dBDb31786613cE944536BA19)] = 60773325253515808;
        expLpAllowances[address(0x184a7a4A16eE839e40CAd1744e9C09355B217810)] = 631181628434378;
    }

    address private VAULT_ADDRESS;
    bool private vaultAddressGiven = false;


	//ADMIN-function: define address of staking contract
    //Can only be called once to set vault address
    function setVaultAddress(address _VAULT_ADDRESS) public {
		require(msg.sender == ADMIN_ADDRESS, "Caller is not admin.");
        require(!vaultAddressGiven, "Vault Address already defined.");
        vaultAddressGiven = true;
        VAULT_ADDRESS = _VAULT_ADDRESS;
    }


    //ADMIN-function: adjust expLpAllowances
    function setExpLpAllowance(address who, uint256 amount) public {
        require(msg.sender == ADMIN_ADDRESS, "Caller is not admin.");
        expLpAllowances[who] = amount;
    }


    //stake exp lp tokens
    function approveStake(address who, uint256 lpAmount) public returns (uint256) {
        require(msg.sender == VAULT_ADDRESS, "Caller is not Vault.");

        uint256 validAmount;
		if (lpAmount > expLpAllowances[who]) {
			validAmount = expLpAllowances[who];
		} else {
			validAmount = lpAmount;
		}

        require(validAmount > 0, "You cannot stake more EXP LP tokens.");

        //reduce allowance, calc balance
        expLpAllowances[who] = expLpAllowances[who].sub(validAmount);
        expLpTotal = expLpTotal.add(validAmount);

        //get lp from user - lp tokens need to be approved by user first
		require(IERC20(WETHxEXP).transferFrom(who, address(this), validAmount), "Token transfer failed.");

        return validAmount;
    }


    //refund LP Token
    function doRefund(address who, uint256 refundAmount) public {
        require(msg.sender == VAULT_ADDRESS, "Caller is not Vault.");

        //increase allowance and send tokens
        expLpAllowances[who] = expLpAllowances[who].add(refundAmount);
        expLpTotal = expLpTotal.sub(refundAmount);
        require(IERC20(WETHxEXP).transfer(who, refundAmount), "LP Token transfer failed.");
    }


    //view total balance
    function viewTotalExpLpBalance() public view returns (uint256) {
        return expLpTotal;
    }
}

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Contract ABI

API

[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"ADMIN_ADDRESS","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"who","type":"address"},{"internalType":"uint256","name":"lpAmount","type":"uint256"}],"name":"approveStake","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"who","type":"address"},{"internalType":"uint256","name":"refundAmount","type":"uint256"}],"name":"doRefund","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"expLpAllowances","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"expLpTotal","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"who","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"setExpLpAllowance","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_VAULT_ADDRESS","type":"address"}],"name":"setVaultAddress","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"viewTotalExpLpBalance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"}]

Contract Creation Code

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Swarm Source

ipfs://55d6bd30c223dfdfb25999ae806fdfd680b89e4ec1200f08a1adfa9bccc5ccd0

Block		Transaction	Difficulty	Gas Used	Reward

View All Blocks Produced

Block		Uncle Number	Difficulty	Gas Used	Reward

View All Uncles

Validator Index	Block		Amount

View All Withdrawals

Transaction Hash	Block		Value	Eth2 PubKey	Valid

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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.

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