ERC-20
Overview
Max Total Supply
86,245,777,056,023.629580522641061158 EUSD
Holders
81
Market
Onchain Market Cap
$0.00
Circulating Supply Market Cap
-
Other Info
Token Contract (WITH 18 Decimals)
Balance
1.377723219317560696 EUSDValue
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# | Exchange | Pair | Price | 24H Volume | % Volume |
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Contract Name:
EUSDDelegator
Compiler Version
v0.5.17+commit.d19bba13
Optimization Enabled:
Yes with 50000 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity)
/** *Submitted for verification at Etherscan.io on 2020-09-19 */ pragma solidity 0.5.17; // SPDX-License-Identifier: MIT /** * @dev Wrappers over Solidity's arithmetic operations with added overflow * checks. * * Arithmetic operations in Solidity wrap on overflow. This can easily result * in bugs, because programmers usually assume that an overflow raises an * error, which is the standard behavior in high level programming languages. * `SafeMath` restores this intuition by reverting the transaction when an * operation overflows. * * Using this library instead of the unchecked operations eliminates an entire * class of bugs, so it's recommended to use it always. */ library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } // Storage for a EUSD token contract EUSDTokenStorage { using SafeMath for uint256; /** * @dev Guard variable for re-entrancy checks. Not currently used */ bool internal _notEntered; /** * @notice EIP-20 token name for this token */ string public name; /** * @notice EIP-20 token symbol for this token */ string public symbol; /** * @notice EIP-20 token decimals for this token */ uint8 public decimals; /** * @notice Governor for this contract */ address public gov; /** * @notice Pending governance for this contract */ address public pendingGov; /** * @notice Approved rebaser for this contract */ address public rebaser; /** * @notice Reserve address of EUSD protocol */ address public incentivizer; /** * @notice Total supply of EUSDs */ uint256 public totalSupply; /** * @notice Internal decimals used to handle scaling factor */ uint256 public constant internalDecimals = 10**24; /** * @notice Used for percentage maths */ uint256 public constant BASE = 10**18; /** * @notice Scaling factor that adjusts everyone's balances */ uint256 public eusdsScalingFactor; mapping (address => uint256) internal _eusdBalances; mapping (address => mapping (address => uint256)) internal _allowedFragments; uint256 public initSupply; } contract EUSDGovernanceStorage { /// @notice A record of each accounts delegate mapping (address => address) internal _delegates; /// @notice A checkpoint for marking number of votes from a given block struct Checkpoint { uint32 fromBlock; uint256 votes; } /// @notice A record of votes checkpoints for each account, by index mapping (address => mapping (uint32 => Checkpoint)) public checkpoints; /// @notice The number of checkpoints for each account mapping (address => uint32) public numCheckpoints; /// @notice The EIP-712 typehash for the contract's domain bytes32 public constant DOMAIN_TYPEHASH = keccak256("EIP712Domain(string name,uint256 chainId,address verifyingContract)"); /// @notice The EIP-712 typehash for the delegation struct used by the contract bytes32 public constant DELEGATION_TYPEHASH = keccak256("Delegation(address delegatee,uint256 nonce,uint256 expiry)"); /// @notice A record of states for signing / validating signatures mapping (address => uint) public nonces; } contract EUSDTokenInterface is EUSDTokenStorage, EUSDGovernanceStorage { /// @notice An event thats emitted when an account changes its delegate event DelegateChanged(address indexed delegator, address indexed fromDelegate, address indexed toDelegate); /// @notice An event thats emitted when a delegate account's vote balance changes event DelegateVotesChanged(address indexed delegate, uint previousBalance, uint newBalance); /** * @notice Event emitted when tokens are rebased */ event Rebase(uint256 epoch, uint256 prevETrdsScalingFactor, uint256 newETrdsScalingFactor); /*** Gov Events ***/ /** * @notice Event emitted when pendingGov is changed */ event NewPendingGov(address oldPendingGov, address newPendingGov); /** * @notice Event emitted when gov is changed */ event NewGov(address oldGov, address newGov); /** * @notice Sets the rebaser contract */ event NewRebaser(address oldRebaser, address newRebaser); /** * @notice Sets the incentivizer contract */ event NewIncentivizer(address oldIncentivizer, address newIncentivizer); /* - ERC20 Events - */ /** * @notice EIP20 Transfer event */ event Transfer(address indexed from, address indexed to, uint amount); /** * @notice EIP20 Approval event */ event Approval(address indexed owner, address indexed spender, uint amount); /* - Extra Events - */ /** * @notice Tokens minted event */ event Mint(address to, uint256 amount); // Public functions function transfer(address to, uint256 value) external returns(bool); function transferFrom(address from, address to, uint256 value) external returns(bool); function balanceOf(address who) external view returns(uint256); function balanceOfUnderlying(address who) external view returns(uint256); function allowance(address owner_, address spender) external view returns(uint256); function approve(address spender, uint256 value) external returns (bool); function increaseAllowance(address spender, uint256 addedValue) external returns (bool); function decreaseAllowance(address spender, uint256 subtractedValue) external returns (bool); function maxScalingFactor() external view returns (uint256); /* - Governance Functions - */ function getPriorVotes(address account, uint blockNumber) external view returns (uint256); function delegateBySig(address delegatee, uint nonce, uint expiry, uint8 v, bytes32 r, bytes32 s) external; function delegate(address delegatee) external; function delegates(address delegator) external view returns (address); function getCurrentVotes(address account) external view returns (uint256); /* - Permissioned/Governance functions - */ function mint(address to, uint256 amount) external returns (bool); function rebase(uint256 epoch, uint256 indexDelta, bool positive) external returns (uint256); function _setRebaser(address rebaser_) external; function _setIncentivizer(address incentivizer_) external; function _setPendingGov(address pendingGov_) external; function _acceptGov() external; } contract EUSDGovernanceToken is EUSDTokenInterface { /// @notice An event thats emitted when an account changes its delegate event DelegateChanged(address indexed delegator, address indexed fromDelegate, address indexed toDelegate); /// @notice An event thats emitted when a delegate account's vote balance changes event DelegateVotesChanged(address indexed delegate, uint previousBalance, uint newBalance); /** * @notice Delegate votes from `msg.sender` to `delegatee` * @param delegator The address to get delegatee for */ function delegates(address delegator) external view returns (address) { return _delegates[delegator]; } /** * @notice Delegate votes from `msg.sender` to `delegatee` * @param delegatee The address to delegate votes to */ function delegate(address delegatee) external { return _delegate(msg.sender, delegatee); } /** * @notice Delegates votes from signatory to `delegatee` * @param delegatee The address to delegate votes to * @param nonce The contract state required to match the signature * @param expiry The time at which to expire the signature * @param v The recovery byte of the signature * @param r Half of the ECDSA signature pair * @param s Half of the ECDSA signature pair */ function delegateBySig( address delegatee, uint nonce, uint expiry, uint8 v, bytes32 r, bytes32 s ) external { bytes32 domainSeparator = keccak256( abi.encode( DOMAIN_TYPEHASH, keccak256(bytes(name)), getChainId(), address(this) ) ); bytes32 structHash = keccak256( abi.encode( DELEGATION_TYPEHASH, delegatee, nonce, expiry ) ); bytes32 digest = keccak256( abi.encodePacked( "\x19\x01", domainSeparator, structHash ) ); address signatory = ecrecover(digest, v, r, s); require(signatory != address(0), "EUSD::delegateBySig: invalid signature"); require(nonce == nonces[signatory]++, "EUSD::delegateBySig: invalid nonce"); require(now <= expiry, "EUSD::delegateBySig: signature expired"); return _delegate(signatory, delegatee); } /** * @notice Gets the current votes balance for `account` * @param account The address to get votes balance * @return The number of current votes for `account` */ function getCurrentVotes(address account) external view returns (uint256) { uint32 nCheckpoints = numCheckpoints[account]; return nCheckpoints > 0 ? checkpoints[account][nCheckpoints - 1].votes : 0; } /** * @notice Determine the prior number of votes for an account as of a block number * @dev Block number must be a finalized block or else this function will revert to prevent misinformation. * @param account The address of the account to check * @param blockNumber The block number to get the vote balance at * @return The number of votes the account had as of the given block */ function getPriorVotes(address account, uint blockNumber) external view returns (uint256) { require(blockNumber < block.number, "EUSD::getPriorVotes: not yet determined"); uint32 nCheckpoints = numCheckpoints[account]; if (nCheckpoints == 0) { return 0; } // First check most recent balance if (checkpoints[account][nCheckpoints - 1].fromBlock <= blockNumber) { return checkpoints[account][nCheckpoints - 1].votes; } // Next check implicit zero balance if (checkpoints[account][0].fromBlock > blockNumber) { return 0; } uint32 lower = 0; uint32 upper = nCheckpoints - 1; while (upper > lower) { uint32 center = upper - (upper - lower) / 2; // ceil, avoiding overflow Checkpoint memory cp = checkpoints[account][center]; if (cp.fromBlock == blockNumber) { return cp.votes; } else if (cp.fromBlock < blockNumber) { lower = center; } else { upper = center - 1; } } return checkpoints[account][lower].votes; } function _delegate(address delegator, address delegatee) internal { address currentDelegate = _delegates[delegator]; uint256 delegatorBalance = _eusdBalances[delegator]; // balance of underlying EUSDs (not scaled); _delegates[delegator] = delegatee; emit DelegateChanged(delegator, currentDelegate, delegatee); _moveDelegates(currentDelegate, delegatee, delegatorBalance); } function _moveDelegates(address srcRep, address dstRep, uint256 amount) internal { if (srcRep != dstRep && amount > 0) { if (srcRep != address(0)) { // decrease old representative uint32 srcRepNum = numCheckpoints[srcRep]; uint256 srcRepOld = srcRepNum > 0 ? checkpoints[srcRep][srcRepNum - 1].votes : 0; uint256 srcRepNew = srcRepOld.sub(amount); _writeCheckpoint(srcRep, srcRepNum, srcRepOld, srcRepNew); } if (dstRep != address(0)) { // increase new representative uint32 dstRepNum = numCheckpoints[dstRep]; uint256 dstRepOld = dstRepNum > 0 ? checkpoints[dstRep][dstRepNum - 1].votes : 0; uint256 dstRepNew = dstRepOld.add(amount); _writeCheckpoint(dstRep, dstRepNum, dstRepOld, dstRepNew); } } } function _writeCheckpoint( address delegatee, uint32 nCheckpoints, uint256 oldVotes, uint256 newVotes ) internal { uint32 blockNumber = safe32(block.number, "EUSD::_writeCheckpoint: block number exceeds 32 bits"); if (nCheckpoints > 0 && checkpoints[delegatee][nCheckpoints - 1].fromBlock == blockNumber) { checkpoints[delegatee][nCheckpoints - 1].votes = newVotes; } else { checkpoints[delegatee][nCheckpoints] = Checkpoint(blockNumber, newVotes); numCheckpoints[delegatee] = nCheckpoints + 1; } emit DelegateVotesChanged(delegatee, oldVotes, newVotes); } function safe32(uint n, string memory errorMessage) internal pure returns (uint32) { require(n < 2**32, errorMessage); return uint32(n); } function getChainId() internal pure returns (uint) { uint256 chainId; assembly { chainId := chainid() } return chainId; } } /* import "./EUSDTokenInterface.sol"; */ contract EUSDToken is EUSDGovernanceToken { // Modifiers modifier onlyGov() { require(msg.sender == gov); _; } modifier onlyRebaser() { require(msg.sender == rebaser); _; } modifier onlyMinter() { require(msg.sender == rebaser || msg.sender == incentivizer || msg.sender == gov, "not minter"); _; } modifier validRecipient(address to) { require(to != address(0x0)); require(to != address(this)); _; } function initialize( string memory name_, string memory symbol_, uint8 decimals_ ) public { require(eusdsScalingFactor == 0, "already initialized"); name = name_; symbol = symbol_; decimals = decimals_; } /** * @notice Computes the current max scaling factor */ function maxScalingFactor() external view returns (uint256) { return _maxScalingFactor(); } function _maxScalingFactor() internal view returns (uint256) { // scaling factor can only go up to 2**256-1 = initSupply * eusdsScalingFactor // this is used to check if eusdsScalingFactor will be too high to compute balances when rebasing. return uint256(-1) / initSupply; } /** * @notice Mints new tokens, increasing totalSupply, initSupply, and a users balance. * @dev Limited to onlyMinter modifier */ function mint(address to, uint256 amount) external onlyMinter returns (bool) { _mint(to, amount); return true; } function _mint(address to, uint256 amount) internal { // increase totalSupply totalSupply = totalSupply.add(amount); // get underlying value uint256 eusdValue = amount.mul(internalDecimals).div(eusdsScalingFactor); // increase initSupply initSupply = initSupply.add(eusdValue); // make sure the mint didnt push maxScalingFactor too low require(eusdsScalingFactor <= _maxScalingFactor(), "max scaling factor too low"); // add balance _eusdBalances[to] = _eusdBalances[to].add(eusdValue); // add delegates to the minter _moveDelegates(address(0), _delegates[to], eusdValue); emit Mint(to, amount); } /* - ERC20 functionality - */ /** * @dev Transfer tokens to a specified address. * @param to The address to transfer to. * @param value The amount to be transferred. * @return True on success, false otherwise. */ function transfer(address to, uint256 value) external validRecipient(to) returns (bool) { // underlying balance is stored in eusds, so divide by current scaling factor // note, this means as scaling factor grows, dust will be untransferrable. // minimum transfer value == eusdsScalingFactor / 1e24; // get amount in underlying uint256 eusdValue = value.mul(internalDecimals).div(eusdsScalingFactor); // sub from balance of sender _eusdBalances[msg.sender] = _eusdBalances[msg.sender].sub(eusdValue); // add to balance of receiver _eusdBalances[to] = _eusdBalances[to].add(eusdValue); emit Transfer(msg.sender, to, value); _moveDelegates(_delegates[msg.sender], _delegates[to], eusdValue); return true; } /** * @dev Transfer tokens from one address to another. * @param from The address you want to send tokens from. * @param to The address you want to transfer to. * @param value The amount of tokens to be transferred. */ function transferFrom(address from, address to, uint256 value) external validRecipient(to) returns (bool) { // decrease allowance _allowedFragments[from][msg.sender] = _allowedFragments[from][msg.sender].sub(value); // get value in eusds uint256 eusdValue = value.mul(internalDecimals).div(eusdsScalingFactor); // sub from from _eusdBalances[from] = _eusdBalances[from].sub(eusdValue); _eusdBalances[to] = _eusdBalances[to].add(eusdValue); emit Transfer(from, to, value); _moveDelegates(_delegates[from], _delegates[to], eusdValue); return true; } /** * @param who The address to query. * @return The balance of the specified address. */ function balanceOf(address who) external view returns (uint256) { return _eusdBalances[who].mul(eusdsScalingFactor).div(internalDecimals); } /** @notice Currently returns the internal storage amount * @param who The address to query. * @return The underlying balance of the specified address. */ function balanceOfUnderlying(address who) external view returns (uint256) { return _eusdBalances[who]; } /** * @dev Function to check the amount of tokens that an owner has allowed to a spender. * @param owner_ The address which owns the funds. * @param spender The address which will spend the funds. * @return The number of tokens still available for the spender. */ function allowance(address owner_, address spender) external view returns (uint256) { return _allowedFragments[owner_][spender]; } /** * @dev Approve the passed address to spend the specified amount of tokens on behalf of * msg.sender. This method is included for ERC20 compatibility. * increaseAllowance and decreaseAllowance should be used instead. * Changing an allowance with this method brings the risk that someone may transfer both * the old and the new allowance - if they are both greater than zero - if a transfer * transaction is mined before the later approve() call is mined. * * @param spender The address which will spend the funds. * @param value The amount of tokens to be spent. */ function approve(address spender, uint256 value) external returns (bool) { _allowedFragments[msg.sender][spender] = value; emit Approval(msg.sender, spender, value); return true; } /** * @dev Increase the amount of tokens that an owner has allowed to a spender. * This method should be used instead of approve() to avoid the double approval vulnerability * described above. * @param spender The address which will spend the funds. * @param addedValue The amount of tokens to increase the allowance by. */ function increaseAllowance(address spender, uint256 addedValue) external returns (bool) { _allowedFragments[msg.sender][spender] = _allowedFragments[msg.sender][spender].add(addedValue); emit Approval(msg.sender, spender, _allowedFragments[msg.sender][spender]); return true; } /** * @dev Decrease the amount of tokens that an owner has allowed to a spender. * * @param spender The address which will spend the funds. * @param subtractedValue The amount of tokens to decrease the allowance by. */ function decreaseAllowance(address spender, uint256 subtractedValue) external returns (bool) { uint256 oldValue = _allowedFragments[msg.sender][spender]; if (subtractedValue >= oldValue) { _allowedFragments[msg.sender][spender] = 0; } else { _allowedFragments[msg.sender][spender] = oldValue.sub(subtractedValue); } emit Approval(msg.sender, spender, _allowedFragments[msg.sender][spender]); return true; } /* - Governance Functions - */ /** @notice sets the rebaser * @param rebaser_ The address of the rebaser contract to use for authentication. */ function _setRebaser(address rebaser_) external onlyGov { address oldRebaser = rebaser; rebaser = rebaser_; emit NewRebaser(oldRebaser, rebaser_); } /** @notice sets the incentivizer * @param incentivizer_ The address of the rebaser contract to use for authentication. */ function _setIncentivizer(address incentivizer_) external onlyGov { address oldIncentivizer = incentivizer; incentivizer = incentivizer_; emit NewIncentivizer(oldIncentivizer, incentivizer_); } /** @notice sets the pendingGov * @param pendingGov_ The address of the rebaser contract to use for authentication. */ function _setPendingGov(address pendingGov_) external onlyGov { address oldPendingGov = pendingGov; pendingGov = pendingGov_; emit NewPendingGov(oldPendingGov, pendingGov_); } /** @notice lets msg.sender accept governance * */ function _acceptGov() external { require(msg.sender == pendingGov, "!pending"); address oldGov = gov; gov = pendingGov; pendingGov = address(0); emit NewGov(oldGov, gov); } /* - Extras - */ /** * @notice Initiates a new rebase operation, provided the minimum time period has elapsed. * * @dev The supply adjustment equals (totalSupply * DeviationFromTargetRate) / rebaseLag * Where DeviationFromTargetRate is (MarketOracleRate - targetRate) / targetRate * and targetRate is CpiOracleRate / baseCpi */ function rebase( uint256 epoch, uint256 indexDelta, bool positive ) external onlyRebaser returns (uint256) { if (indexDelta == 0) { emit Rebase(epoch, eusdsScalingFactor, eusdsScalingFactor); return totalSupply; } uint256 prevETrdsScalingFactor = eusdsScalingFactor; if (!positive) { eusdsScalingFactor = eusdsScalingFactor.mul(BASE.sub(indexDelta)).div(BASE); } else { uint256 newScalingFactor = eusdsScalingFactor.mul(BASE.add(indexDelta)).div(BASE); if (newScalingFactor < _maxScalingFactor()) { eusdsScalingFactor = newScalingFactor; } else { eusdsScalingFactor = _maxScalingFactor(); } } totalSupply = initSupply.mul(eusdsScalingFactor).div(BASE); emit Rebase(epoch, prevETrdsScalingFactor, eusdsScalingFactor); return totalSupply; } } contract EUSD is EUSDToken { /** * @notice Initialize the new money market * @param name_ ERC-20 name of this token * @param symbol_ ERC-20 symbol of this token * @param decimals_ ERC-20 decimal precision of this token */ function initialize( string memory name_, string memory symbol_, uint8 decimals_, address initial_owner, uint256 initSupply_ ) public { require(initSupply_ > 0, "0 init supply"); super.initialize(name_, symbol_, decimals_); initSupply = initSupply_.mul(10**24/ (BASE)); totalSupply = initSupply_; eusdsScalingFactor = BASE; _eusdBalances[initial_owner] = initSupply_.mul(10**24 / (BASE)); // owner renounces ownership after deployment as they need to set // rebaser and incentivizer // gov = gov_; } } contract EUSDDelegationStorage { /** * @notice Implementation address for this contract */ address public implementation; } contract EUSDDelegatorInterface is EUSDDelegationStorage { /** * @notice Emitted when implementation is changed */ event NewImplementation(address oldImplementation, address newImplementation); /** * @notice Called by the gov to update the implementation of the delegator * @param implementation_ The address of the new implementation for delegation * @param allowResign Flag to indicate whether to call _resignImplementation on the old implementation * @param becomeImplementationData The encoded bytes data to be passed to _becomeImplementation */ function _setImplementation(address implementation_, bool allowResign, bytes memory becomeImplementationData) public; } contract EUSDDelegateInterface is EUSDDelegationStorage { /** * @notice Called by the delegator on a delegate to initialize it for duty * @dev Should revert if any issues arise which make it unfit for delegation * @param data The encoded bytes data for any initialization */ function _becomeImplementation(bytes memory data) public; /** * @notice Called by the delegator on a delegate to forfeit its responsibility */ function _resignImplementation() public; } contract EUSDDelegate is EUSD, EUSDDelegateInterface { /** * @notice Construct an empty delegate */ constructor() public {} /** * @notice Called by the delegator on a delegate to initialize it for duty * @param data The encoded bytes data for any initialization */ function _becomeImplementation(bytes memory data) public { // Shh -- currently unused data; // Shh -- we don't ever want this hook to be marked pure if (false) { implementation = address(0); } require(msg.sender == gov, "only the gov may call _becomeImplementation"); } /** * @notice Called by the delegator on a delegate to forfeit its responsibility */ function _resignImplementation() public { // Shh -- we don't ever want this hook to be marked pure if (false) { implementation = address(0); } require(msg.sender == gov, "only the gov may call _resignImplementation"); } } contract EUSDDelegator is EUSDTokenInterface, EUSDDelegatorInterface { /** * @notice Construct a new EUSD * @param name_ ERC-20 name of this token * @param symbol_ ERC-20 symbol of this token * @param decimals_ ERC-20 decimal precision of this token * @param initSupply_ Initial token amount * @param implementation_ The address of the implementation the contract delegates to * @param becomeImplementationData The encoded args for becomeImplementation */ constructor( string memory name_, string memory symbol_, uint8 decimals_, uint256 initSupply_, address implementation_, bytes memory becomeImplementationData ) public { // Creator of the contract is gov during initialization gov = msg.sender; // First delegate gets to initialize the delegator (i.e. storage contract) delegateTo( implementation_, abi.encodeWithSignature( "initialize(string,string,uint8,address,uint256)", name_, symbol_, decimals_, msg.sender, initSupply_ ) ); // New implementations always get set via the settor (post-initialize) _setImplementation(implementation_, false, becomeImplementationData); } /** * @notice Called by the gov to update the implementation of the delegator * @param implementation_ The address of the new implementation for delegation * @param allowResign Flag to indicate whether to call _resignImplementation on the old implementation * @param becomeImplementationData The encoded bytes data to be passed to _becomeImplementation */ function _setImplementation(address implementation_, bool allowResign, bytes memory becomeImplementationData) public { require(msg.sender == gov, "EUSDDelegator::_setImplementation: Caller must be gov"); if (allowResign) { delegateToImplementation(abi.encodeWithSignature("_resignImplementation()")); } address oldImplementation = implementation; implementation = implementation_; delegateToImplementation(abi.encodeWithSignature("_becomeImplementation(bytes)", becomeImplementationData)); emit NewImplementation(oldImplementation, implementation); } /** * @notice Sender supplies assets into the market and receives cTokens in exchange * @dev Accrues interest whether or not the operation succeeds, unless reverted * @param mintAmount The amount of the underlying asset to supply * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function mint(address to, uint256 mintAmount) external returns (bool) { to; mintAmount; // Shh delegateAndReturn(); } /** * @notice Transfer `amount` tokens from `msg.sender` to `dst` * @param dst The address of the destination account * @param amount The number of tokens to transfer * @return Whether or not the transfer succeeded */ function transfer(address dst, uint256 amount) external returns (bool) { dst; amount; // Shh delegateAndReturn(); } /** * @notice Transfer `amount` tokens from `src` to `dst` * @param src The address of the source account * @param dst The address of the destination account * @param amount The number of tokens to transfer * @return Whether or not the transfer succeeded */ function transferFrom( address src, address dst, uint256 amount ) external returns (bool) { src; dst; amount; // Shh delegateAndReturn(); } /** * @notice Approve `spender` to transfer up to `amount` from `src` * @dev This will overwrite the approval amount for `spender` * and is subject to issues noted [here](https://eips.ethereum.org/EIPS/eip-20#approve) * @param spender The address of the account which may transfer tokens * @param amount The number of tokens that are approved (-1 means infinite) * @return Whether or not the approval succeeded */ function approve( address spender, uint256 amount ) external returns (bool) { spender; amount; // Shh delegateAndReturn(); } /** * @dev Increase the amount of tokens that an owner has allowed to a spender. * This method should be used instead of approve() to avoid the double approval vulnerability * described above. * @param spender The address which will spend the funds. * @param addedValue The amount of tokens to increase the allowance by. */ function increaseAllowance( address spender, uint256 addedValue ) external returns (bool) { spender; addedValue; // Shh delegateAndReturn(); } function maxScalingFactor() external view returns (uint256) { delegateToViewAndReturn(); } function rebase( uint256 epoch, uint256 indexDelta, bool positive ) external returns (uint256) { epoch; indexDelta; positive; delegateAndReturn(); } /** * @dev Decrease the amount of tokens that an owner has allowed to a spender. * * @param spender The address which will spend the funds. * @param subtractedValue The amount of tokens to decrease the allowance by. */ function decreaseAllowance( address spender, uint256 subtractedValue ) external returns (bool) { spender; subtractedValue; // Shh delegateAndReturn(); } /** * @notice Get the current allowance from `owner` for `spender` * @param owner The address of the account which owns the tokens to be spent * @param spender The address of the account which may transfer tokens * @return The number of tokens allowed to be spent (-1 means infinite) */ function allowance( address owner, address spender ) external view returns (uint256) { owner; spender; // Shh delegateToViewAndReturn(); } /** * @notice Get the current allowance from `owner` for `spender` * @param delegator The address of the account which has designated a delegate * @return Address of delegatee */ function delegates( address delegator ) external view returns (address) { delegator; // Shh delegateToViewAndReturn(); } /** * @notice Get the token balance of the `owner` * @param owner The address of the account to query * @return The number of tokens owned by `owner` */ function balanceOf(address owner) external view returns (uint256) { owner; // Shh delegateToViewAndReturn(); } /** * @notice Currently unused. For future compatability * @param owner The address of the account to query * @return The number of underlying tokens owned by `owner` */ function balanceOfUnderlying(address owner) external view returns (uint256) { owner; // Shh delegateToViewAndReturn(); } /*** Gov Functions ***/ /** * @notice Begins transfer of gov rights. The newPendingGov must call `_acceptGov` to finalize the transfer. * @dev Gov function to begin change of gov. The newPendingGov must call `_acceptGov` to finalize the transfer. * @param newPendingGov New pending gov. */ function _setPendingGov(address newPendingGov) external { newPendingGov; // Shh delegateAndReturn(); } function _setRebaser(address rebaser_) external { rebaser_; // Shh delegateAndReturn(); } function _setIncentivizer(address incentivizer_) external { incentivizer_; // Shh delegateAndReturn(); } /** * @notice Accepts transfer of gov rights. msg.sender must be pendingGov * @dev Gov function for pending gov to accept role and update gov * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _acceptGov() external { delegateAndReturn(); } function getPriorVotes(address account, uint blockNumber) external view returns (uint256) { account; blockNumber; delegateToViewAndReturn(); } function delegateBySig( address delegatee, uint nonce, uint expiry, uint8 v, bytes32 r, bytes32 s ) external { delegatee; nonce; expiry; v; r; s; delegateAndReturn(); } function delegate(address delegatee) external { delegatee; delegateAndReturn(); } function getCurrentVotes(address account) external view returns (uint256) { account; delegateToViewAndReturn(); } /** * @notice Internal method to delegate execution to another contract * @dev It returns to the external caller whatever the implementation returns or forwards reverts * @param callee The contract to delegatecall * @param data The raw data to delegatecall * @return The returned bytes from the delegatecall */ function delegateTo(address callee, bytes memory data) internal returns (bytes memory) { (bool success, bytes memory returnData) = callee.delegatecall(data); assembly { if eq(success, 0) { revert(add(returnData, 0x20), returndatasize) } } return returnData; } /** * @notice Delegates execution to the implementation contract * @dev It returns to the external caller whatever the implementation returns or forwards reverts * @param data The raw data to delegatecall * @return The returned bytes from the delegatecall */ function delegateToImplementation(bytes memory data) public returns (bytes memory) { return delegateTo(implementation, data); } /** * @notice Delegates execution to an implementation contract * @dev It returns to the external caller whatever the implementation returns or forwards reverts * There are an additional 2 prefix uints from the wrapper returndata, which we ignore since we make an extra hop. * @param data The raw data to delegatecall * @return The returned bytes from the delegatecall */ function delegateToViewImplementation(bytes memory data) public view returns (bytes memory) { (bool success, bytes memory returnData) = address(this).staticcall(abi.encodeWithSignature("delegateToImplementation(bytes)", data)); assembly { if eq(success, 0) { revert(add(returnData, 0x20), returndatasize) } } return abi.decode(returnData, (bytes)); } function delegateToViewAndReturn() private view returns (bytes memory) { (bool success, ) = address(this).staticcall(abi.encodeWithSignature("delegateToImplementation(bytes)", msg.data)); assembly { let free_mem_ptr := mload(0x40) returndatacopy(free_mem_ptr, 0, returndatasize) switch success case 0 { revert(free_mem_ptr, returndatasize) } default { return(add(free_mem_ptr, 0x40), returndatasize) } } } function delegateAndReturn() private returns (bytes memory) { (bool success, ) = implementation.delegatecall(msg.data); assembly { let free_mem_ptr := mload(0x40) returndatacopy(free_mem_ptr, 0, returndatasize) switch success case 0 { revert(free_mem_ptr, returndatasize) } default { return(free_mem_ptr, returndatasize) } } } /** * @notice Delegates execution to an implementation contract * @dev It returns to the external caller whatever the implementation returns or forwards reverts */ function () external payable { require(msg.value == 0,"EUSDDelegator:fallback: cannot send value to fallback"); // delegate all other functions to current implementation delegateAndReturn(); } }
Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
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function"},{"constant":true,"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"balanceOfUnderlying","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"uint32","name":"","type":"uint32"}],"name":"checkpoints","outputs":[{"internalType":"uint32","name":"fromBlock","type":"uint32"},{"internalType":"uint256","name":"votes","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"subtractedValue","type":"uint256"}],"name":"decreaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"delegatee","type":"address"}],"name":"delegate","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"delegatee","type":"address"},{"internalType":"uint256","name":"nonce","type":"uint256"},{"internalType":"uint256","name":"expiry","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"delegateBySig","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"bytes","name":"data","type":"bytes"}],"name":"delegateToImplementation","outputs":[{"internalType":"bytes","name":"","type":"bytes"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"internalType":"bytes","name":"data","type":"bytes"}],"name":"delegateToViewImplementation","outputs":[{"internalType":"bytes","name":"","type":"bytes"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"delegator","type":"address"}],"name":"delegates","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"eusdsScalingFactor","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"getCurrentVotes","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"uint256","name":"blockNumber","type":"uint256"}],"name":"getPriorVotes","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"gov","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"implementation","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"incentivizer","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"addedValue","type":"uint256"}],"name":"increaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"initSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","t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Contract Creation Code
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Deployed Bytecode
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
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
-----Decoded View---------------
Arg [0] : name_ (string): EUSD
Arg [1] : symbol_ (string): EUSD
Arg [2] : decimals_ (uint8): 18
Arg [3] : initSupply_ (uint256): 6660000000000000000000000
Arg [4] : implementation_ (address): 0x08C9771c44CFb8d02805E0C51013a71a20cD5a3D
Arg [5] : becomeImplementationData (bytes): 0x
-----Encoded View---------------
11 Constructor Arguments found :
Arg [0] : 00000000000000000000000000000000000000000000000000000000000000c0
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000100
Arg [2] : 0000000000000000000000000000000000000000000000000000000000000012
Arg [3] : 00000000000000000000000000000000000000000005824f52cccfb3ba800000
Arg [4] : 00000000000000000000000008c9771c44cfb8d02805e0c51013a71a20cd5a3d
Arg [5] : 0000000000000000000000000000000000000000000000000000000000000140
Arg [6] : 0000000000000000000000000000000000000000000000000000000000000004
Arg [7] : 4555534400000000000000000000000000000000000000000000000000000000
Arg [8] : 0000000000000000000000000000000000000000000000000000000000000004
Arg [9] : 4555534400000000000000000000000000000000000000000000000000000000
Arg [10] : 0000000000000000000000000000000000000000000000000000000000000000
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