ERC-20
Overview
Max Total Supply
21,665,930.763764634089078864 SDS
Holders
42,676
Market
Price
$0.00 @ 0.000000 ETH
Onchain Market Cap
$0.00
Circulating Supply Market Cap
-
Other Info
Token Contract (WITH 18 Decimals)
Balance
22.708787045840311003 SDSValue
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Contract Name:
SynthetixDebtShare
Compiler Version
v0.5.16+commit.9c3226ce
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity)
/** *Submitted for verification at optimistic.etherscan.io on 2022-02-09 */ /* ____ __ __ __ _ / __/__ __ ___ / /_ / / ___ / /_ (_)__ __ _\ \ / // // _ \/ __// _ \/ -_)/ __// / \ \ / /___/ \_, //_//_/\__//_//_/\__/ \__//_/ /_\_\ /___/ * Synthetix: SynthetixDebtShare.sol * * Latest source (may be newer): https://github.com/Synthetixio/synthetix/blob/master/contracts/SynthetixDebtShare.sol * Docs: https://docs.synthetix.io/contracts/SynthetixDebtShare * * Contract Dependencies: * - IAddressResolver * - ISynthetixDebtShare * - MixinResolver * - Owned * Libraries: * - SafeDecimalMath * - SafeMath * * MIT License * =========== * * Copyright (c) 2022 Synthetix * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE */ pragma solidity ^0.5.16; // https://docs.synthetix.io/contracts/source/contracts/owned contract Owned { address public owner; address public nominatedOwner; constructor(address _owner) public { require(_owner != address(0), "Owner address cannot be 0"); owner = _owner; emit OwnerChanged(address(0), _owner); } function nominateNewOwner(address _owner) external onlyOwner { nominatedOwner = _owner; emit OwnerNominated(_owner); } function acceptOwnership() external { require(msg.sender == nominatedOwner, "You must be nominated before you can accept ownership"); emit OwnerChanged(owner, nominatedOwner); owner = nominatedOwner; nominatedOwner = address(0); } modifier onlyOwner { _onlyOwner(); _; } function _onlyOwner() private view { require(msg.sender == owner, "Only the contract owner may perform this action"); } event OwnerNominated(address newOwner); event OwnerChanged(address oldOwner, address newOwner); } // https://docs.synthetix.io/contracts/source/interfaces/isynthetixdebtshare interface ISynthetixDebtShare { // Views function currentPeriodId() external view returns (uint128); function allowance(address account, address spender) external view returns (uint); function balanceOf(address account) external view returns (uint); function balanceOfOnPeriod(address account, uint periodId) external view returns (uint); function totalSupply() external view returns (uint); function sharePercent(address account) external view returns (uint); function sharePercentOnPeriod(address account, uint periodId) external view returns (uint); // Mutative functions function takeSnapshot(uint128 id) external; function mintShare(address account, uint256 amount) external; function burnShare(address account, uint256 amount) external; function approve(address, uint256) external pure returns (bool); function transfer(address to, uint256 amount) external pure returns(bool); function transferFrom(address from, address to, uint256 amount) external returns(bool); function addAuthorizedBroker(address target) external; function removeAuthorizedBroker(address target) external; function addAuthorizedToSnapshot(address target) external; function removeAuthorizedToSnapshot(address target) external; } // https://docs.synthetix.io/contracts/source/interfaces/iaddressresolver interface IAddressResolver { function getAddress(bytes32 name) external view returns (address); function getSynth(bytes32 key) external view returns (address); function requireAndGetAddress(bytes32 name, string calldata reason) external view returns (address); } // https://docs.synthetix.io/contracts/source/interfaces/isynth interface ISynth { // Views function currencyKey() external view returns (bytes32); function transferableSynths(address account) external view returns (uint); // Mutative functions function transferAndSettle(address to, uint value) external returns (bool); function transferFromAndSettle( address from, address to, uint value ) external returns (bool); // Restricted: used internally to Synthetix function burn(address account, uint amount) external; function issue(address account, uint amount) external; } // https://docs.synthetix.io/contracts/source/interfaces/iissuer interface IIssuer { // Views function anySynthOrSNXRateIsInvalid() external view returns (bool anyRateInvalid); function availableCurrencyKeys() external view returns (bytes32[] memory); function availableSynthCount() external view returns (uint); function availableSynths(uint index) external view returns (ISynth); function canBurnSynths(address account) external view returns (bool); function collateral(address account) external view returns (uint); function collateralisationRatio(address issuer) external view returns (uint); function collateralisationRatioAndAnyRatesInvalid(address _issuer) external view returns (uint cratio, bool anyRateIsInvalid); function debtBalanceOf(address issuer, bytes32 currencyKey) external view returns (uint debtBalance); function issuanceRatio() external view returns (uint); function lastIssueEvent(address account) external view returns (uint); function maxIssuableSynths(address issuer) external view returns (uint maxIssuable); function minimumStakeTime() external view returns (uint); function remainingIssuableSynths(address issuer) external view returns ( uint maxIssuable, uint alreadyIssued, uint totalSystemDebt ); function synths(bytes32 currencyKey) external view returns (ISynth); function getSynths(bytes32[] calldata currencyKeys) external view returns (ISynth[] memory); function synthsByAddress(address synthAddress) external view returns (bytes32); function totalIssuedSynths(bytes32 currencyKey, bool excludeOtherCollateral) external view returns (uint); function transferableSynthetixAndAnyRateIsInvalid(address account, uint balance) external view returns (uint transferable, bool anyRateIsInvalid); // Restricted: used internally to Synthetix function issueSynths(address from, uint amount) external; function issueSynthsOnBehalf( address issueFor, address from, uint amount ) external; function issueMaxSynths(address from) external; function issueMaxSynthsOnBehalf(address issueFor, address from) external; function burnSynths(address from, uint amount) external; function burnSynthsOnBehalf( address burnForAddress, address from, uint amount ) external; function burnSynthsToTarget(address from) external; function burnSynthsToTargetOnBehalf(address burnForAddress, address from) external; function burnForRedemption( address deprecatedSynthProxy, address account, uint balance ) external; function liquidateDelinquentAccount( address account, uint susdAmount, address liquidator ) external returns (uint totalRedeemed, uint amountToLiquidate); function setCurrentPeriodId(uint128 periodId) external; } // Inheritance // Internal references // https://docs.synthetix.io/contracts/source/contracts/addressresolver contract AddressResolver is Owned, IAddressResolver { mapping(bytes32 => address) public repository; constructor(address _owner) public Owned(_owner) {} /* ========== RESTRICTED FUNCTIONS ========== */ function importAddresses(bytes32[] calldata names, address[] calldata destinations) external onlyOwner { require(names.length == destinations.length, "Input lengths must match"); for (uint i = 0; i < names.length; i++) { bytes32 name = names[i]; address destination = destinations[i]; repository[name] = destination; emit AddressImported(name, destination); } } /* ========= PUBLIC FUNCTIONS ========== */ function rebuildCaches(MixinResolver[] calldata destinations) external { for (uint i = 0; i < destinations.length; i++) { destinations[i].rebuildCache(); } } /* ========== VIEWS ========== */ function areAddressesImported(bytes32[] calldata names, address[] calldata destinations) external view returns (bool) { for (uint i = 0; i < names.length; i++) { if (repository[names[i]] != destinations[i]) { return false; } } return true; } function getAddress(bytes32 name) external view returns (address) { return repository[name]; } function requireAndGetAddress(bytes32 name, string calldata reason) external view returns (address) { address _foundAddress = repository[name]; require(_foundAddress != address(0), reason); return _foundAddress; } function getSynth(bytes32 key) external view returns (address) { IIssuer issuer = IIssuer(repository["Issuer"]); require(address(issuer) != address(0), "Cannot find Issuer address"); return address(issuer.synths(key)); } /* ========== EVENTS ========== */ event AddressImported(bytes32 name, address destination); } // Internal references // https://docs.synthetix.io/contracts/source/contracts/mixinresolver contract MixinResolver { AddressResolver public resolver; mapping(bytes32 => address) private addressCache; constructor(address _resolver) internal { resolver = AddressResolver(_resolver); } /* ========== INTERNAL FUNCTIONS ========== */ function combineArrays(bytes32[] memory first, bytes32[] memory second) internal pure returns (bytes32[] memory combination) { combination = new bytes32[](first.length + second.length); for (uint i = 0; i < first.length; i++) { combination[i] = first[i]; } for (uint j = 0; j < second.length; j++) { combination[first.length + j] = second[j]; } } /* ========== PUBLIC FUNCTIONS ========== */ // Note: this function is public not external in order for it to be overridden and invoked via super in subclasses function resolverAddressesRequired() public view returns (bytes32[] memory addresses) {} function rebuildCache() public { bytes32[] memory requiredAddresses = resolverAddressesRequired(); // The resolver must call this function whenver it updates its state for (uint i = 0; i < requiredAddresses.length; i++) { bytes32 name = requiredAddresses[i]; // Note: can only be invoked once the resolver has all the targets needed added address destination = resolver.requireAndGetAddress(name, string(abi.encodePacked("Resolver missing target: ", name))); addressCache[name] = destination; emit CacheUpdated(name, destination); } } /* ========== VIEWS ========== */ function isResolverCached() external view returns (bool) { bytes32[] memory requiredAddresses = resolverAddressesRequired(); for (uint i = 0; i < requiredAddresses.length; i++) { bytes32 name = requiredAddresses[i]; // false if our cache is invalid or if the resolver doesn't have the required address if (resolver.getAddress(name) != addressCache[name] || addressCache[name] == address(0)) { return false; } } return true; } /* ========== INTERNAL FUNCTIONS ========== */ function requireAndGetAddress(bytes32 name) internal view returns (address) { address _foundAddress = addressCache[name]; require(_foundAddress != address(0), string(abi.encodePacked("Missing address: ", name))); return _foundAddress; } /* ========== EVENTS ========== */ event CacheUpdated(bytes32 name, address destination); } /** * @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) { require(b <= a, "SafeMath: subtraction overflow"); 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-solidity/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) { // Solidity only automatically asserts when dividing by 0 require(b > 0, "SafeMath: division by zero"); 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) { require(b != 0, "SafeMath: modulo by zero"); return a % b; } } // Libraries // https://docs.synthetix.io/contracts/source/libraries/safedecimalmath library SafeDecimalMath { using SafeMath for uint; /* Number of decimal places in the representations. */ uint8 public constant decimals = 18; uint8 public constant highPrecisionDecimals = 27; /* The number representing 1.0. */ uint public constant UNIT = 10**uint(decimals); /* The number representing 1.0 for higher fidelity numbers. */ uint public constant PRECISE_UNIT = 10**uint(highPrecisionDecimals); uint private constant UNIT_TO_HIGH_PRECISION_CONVERSION_FACTOR = 10**uint(highPrecisionDecimals - decimals); /** * @return Provides an interface to UNIT. */ function unit() external pure returns (uint) { return UNIT; } /** * @return Provides an interface to PRECISE_UNIT. */ function preciseUnit() external pure returns (uint) { return PRECISE_UNIT; } /** * @return The result of multiplying x and y, interpreting the operands as fixed-point * decimals. * * @dev A unit factor is divided out after the product of x and y is evaluated, * so that product must be less than 2**256. As this is an integer division, * the internal division always rounds down. This helps save on gas. Rounding * is more expensive on gas. */ function multiplyDecimal(uint x, uint y) internal pure returns (uint) { /* Divide by UNIT to remove the extra factor introduced by the product. */ return x.mul(y) / UNIT; } /** * @return The result of safely multiplying x and y, interpreting the operands * as fixed-point decimals of the specified precision unit. * * @dev The operands should be in the form of a the specified unit factor which will be * divided out after the product of x and y is evaluated, so that product must be * less than 2**256. * * Unlike multiplyDecimal, this function rounds the result to the nearest increment. * Rounding is useful when you need to retain fidelity for small decimal numbers * (eg. small fractions or percentages). */ function _multiplyDecimalRound( uint x, uint y, uint precisionUnit ) private pure returns (uint) { /* Divide by UNIT to remove the extra factor introduced by the product. */ uint quotientTimesTen = x.mul(y) / (precisionUnit / 10); if (quotientTimesTen % 10 >= 5) { quotientTimesTen += 10; } return quotientTimesTen / 10; } /** * @return The result of safely multiplying x and y, interpreting the operands * as fixed-point decimals of a precise unit. * * @dev The operands should be in the precise unit factor which will be * divided out after the product of x and y is evaluated, so that product must be * less than 2**256. * * Unlike multiplyDecimal, this function rounds the result to the nearest increment. * Rounding is useful when you need to retain fidelity for small decimal numbers * (eg. small fractions or percentages). */ function multiplyDecimalRoundPrecise(uint x, uint y) internal pure returns (uint) { return _multiplyDecimalRound(x, y, PRECISE_UNIT); } /** * @return The result of safely multiplying x and y, interpreting the operands * as fixed-point decimals of a standard unit. * * @dev The operands should be in the standard unit factor which will be * divided out after the product of x and y is evaluated, so that product must be * less than 2**256. * * Unlike multiplyDecimal, this function rounds the result to the nearest increment. * Rounding is useful when you need to retain fidelity for small decimal numbers * (eg. small fractions or percentages). */ function multiplyDecimalRound(uint x, uint y) internal pure returns (uint) { return _multiplyDecimalRound(x, y, UNIT); } /** * @return The result of safely dividing x and y. The return value is a high * precision decimal. * * @dev y is divided after the product of x and the standard precision unit * is evaluated, so the product of x and UNIT must be less than 2**256. As * this is an integer division, the result is always rounded down. * This helps save on gas. Rounding is more expensive on gas. */ function divideDecimal(uint x, uint y) internal pure returns (uint) { /* Reintroduce the UNIT factor that will be divided out by y. */ return x.mul(UNIT).div(y); } /** * @return The result of safely dividing x and y. The return value is as a rounded * decimal in the precision unit specified in the parameter. * * @dev y is divided after the product of x and the specified precision unit * is evaluated, so the product of x and the specified precision unit must * be less than 2**256. The result is rounded to the nearest increment. */ function _divideDecimalRound( uint x, uint y, uint precisionUnit ) private pure returns (uint) { uint resultTimesTen = x.mul(precisionUnit * 10).div(y); if (resultTimesTen % 10 >= 5) { resultTimesTen += 10; } return resultTimesTen / 10; } /** * @return The result of safely dividing x and y. The return value is as a rounded * standard precision decimal. * * @dev y is divided after the product of x and the standard precision unit * is evaluated, so the product of x and the standard precision unit must * be less than 2**256. The result is rounded to the nearest increment. */ function divideDecimalRound(uint x, uint y) internal pure returns (uint) { return _divideDecimalRound(x, y, UNIT); } /** * @return The result of safely dividing x and y. The return value is as a rounded * high precision decimal. * * @dev y is divided after the product of x and the high precision unit * is evaluated, so the product of x and the high precision unit must * be less than 2**256. The result is rounded to the nearest increment. */ function divideDecimalRoundPrecise(uint x, uint y) internal pure returns (uint) { return _divideDecimalRound(x, y, PRECISE_UNIT); } /** * @dev Convert a standard decimal representation to a high precision one. */ function decimalToPreciseDecimal(uint i) internal pure returns (uint) { return i.mul(UNIT_TO_HIGH_PRECISION_CONVERSION_FACTOR); } /** * @dev Convert a high precision decimal to a standard decimal representation. */ function preciseDecimalToDecimal(uint i) internal pure returns (uint) { uint quotientTimesTen = i / (UNIT_TO_HIGH_PRECISION_CONVERSION_FACTOR / 10); if (quotientTimesTen % 10 >= 5) { quotientTimesTen += 10; } return quotientTimesTen / 10; } // Computes `a - b`, setting the value to 0 if b > a. function floorsub(uint a, uint b) internal pure returns (uint) { return b >= a ? 0 : a - b; } /* ---------- Utilities ---------- */ /* * Absolute value of the input, returned as a signed number. */ function signedAbs(int x) internal pure returns (int) { return x < 0 ? -x : x; } /* * Absolute value of the input, returned as an unsigned number. */ function abs(int x) internal pure returns (uint) { return uint(signedAbs(x)); } } // Inheritance // Libraries // https://docs.synthetix.io/contracts/source/contracts/synthetixdebtshare contract SynthetixDebtShare is Owned, MixinResolver, ISynthetixDebtShare { using SafeMath for uint; using SafeDecimalMath for uint; struct PeriodBalance { uint128 amount; uint128 periodId; } bytes32 public constant CONTRACT_NAME = "SynthetixDebtShare"; bytes32 private constant CONTRACT_ISSUER = "Issuer"; uint internal constant MAX_PERIOD_ITERATE = 30; /* ========== STATE VARIABLES ========== */ /** * Addresses selected by owner which are allowed to call `transferFrom` to manage debt shares */ mapping(address => bool) public authorizedBrokers; /** * Addresses selected by owner which are allowed to call `takeSnapshot` * `takeSnapshot` is not public because only a small number of snapshots can be retained for a period of time, and so they * must be controlled to prevent censorship */ mapping(address => bool) public authorizedToSnapshot; /** * Records a user's balance as it changes from period to period. * The last item in the array always represents the user's most recent balance * The intermediate balance is only recorded if * `currentPeriodId` differs (which would happen upon a call to `setCurrentPeriodId`) */ mapping(address => PeriodBalance[]) public balances; /** * Records totalSupply as it changes from period to period * Similar to `balances`, the `totalSupplyOnPeriod` at index `currentPeriodId` matches the current total supply * Any other period ID would represent its most recent totalSupply before the period ID changed. */ mapping(uint => uint) public totalSupplyOnPeriod; /* ERC20 fields. */ string public name; string public symbol; uint8 public decimals; /** * Period ID used for recording accounting changes * Can only increment */ uint128 public currentPeriodId; /** * Prevents the owner from making further changes to debt shares after initial import */ bool public isInitialized = false; constructor(address _owner, address _resolver) public Owned(_owner) MixinResolver(_resolver) { name = "Synthetix Debt Shares"; symbol = "SDS"; decimals = 18; // NOTE: must match initial fee period ID on `FeePool` constructor if issuer wont report currentPeriodId = 1; } function resolverAddressesRequired() public view returns (bytes32[] memory addresses) { addresses = new bytes32[](1); addresses[0] = CONTRACT_ISSUER; } /* ========== VIEWS ========== */ function balanceOf(address account) public view returns (uint) { uint accountPeriodHistoryCount = balances[account].length; if (accountPeriodHistoryCount == 0) { return 0; } return uint(balances[account][accountPeriodHistoryCount - 1].amount); } function balanceOfOnPeriod(address account, uint periodId) public view returns (uint) { uint accountPeriodHistoryCount = balances[account].length; int oldestHistoryIterate = int(MAX_PERIOD_ITERATE < accountPeriodHistoryCount ? accountPeriodHistoryCount - MAX_PERIOD_ITERATE : 0); int i; for (i = int(accountPeriodHistoryCount) - 1;i >= oldestHistoryIterate;i--) { if (balances[account][uint(i)].periodId <= periodId) { return uint(balances[account][uint(i)].amount); } } require(i < 0, "SynthetixDebtShare: not found in recent history"); return 0; } function totalSupply() public view returns (uint) { return totalSupplyOnPeriod[currentPeriodId]; } function sharePercent(address account) external view returns (uint) { return sharePercentOnPeriod(account, currentPeriodId); } function sharePercentOnPeriod(address account, uint periodId) public view returns (uint) { uint balance = balanceOfOnPeriod(account, periodId); if (balance == 0) { return 0; } return balance.divideDecimal(totalSupplyOnPeriod[periodId]); } function allowance(address, address spender) public view returns (uint) { if (authorizedBrokers[spender]) { return uint(-1); } else { return 0; } } /* ========== MUTATIVE FUNCTIONS ========== */ function addAuthorizedBroker(address target) external onlyOwner { authorizedBrokers[target] = true; emit ChangeAuthorizedBroker(target, true); } function removeAuthorizedBroker(address target) external onlyOwner { authorizedBrokers[target] = false; emit ChangeAuthorizedBroker(target, false); } function addAuthorizedToSnapshot(address target) external onlyOwner { authorizedToSnapshot[target] = true; emit ChangeAuthorizedToSnapshot(target, true); } function removeAuthorizedToSnapshot(address target) external onlyOwner { authorizedToSnapshot[target] = false; emit ChangeAuthorizedToSnapshot(target, false); } function takeSnapshot(uint128 id) external onlyAuthorizedToSnapshot { require(id > currentPeriodId, "period id must always increase"); totalSupplyOnPeriod[id] = totalSupplyOnPeriod[currentPeriodId]; currentPeriodId = id; } function mintShare(address account, uint256 amount) external onlyIssuer { require(account != address(0), "ERC20: mint to the zero address"); _increaseBalance(account, amount); totalSupplyOnPeriod[currentPeriodId] = totalSupplyOnPeriod[currentPeriodId].add(amount); emit Transfer(address(0), account, amount); emit Mint(account, amount); } function burnShare(address account, uint256 amount) external onlyIssuer { require(account != address(0), "ERC20: burn from zero address"); _deductBalance(account, amount); totalSupplyOnPeriod[currentPeriodId] = totalSupplyOnPeriod[currentPeriodId].sub(amount); emit Transfer(account, address(0), amount); emit Burn(account, amount); } function approve(address, uint256) external pure returns(bool) { revert("debt shares are not transferrable"); } function transfer(address, uint256) external pure returns(bool) { revert("debt shares are not transferrable"); } function transferFrom(address from, address to, uint256 amount) external onlyAuthorizedBrokers returns(bool) { require(to != address(0), "ERC20: send to the zero address"); _deductBalance(from, amount); _increaseBalance(to, amount); emit Transfer(address(from), address(to), amount); return true; } function importAddresses(address[] calldata accounts, uint256[] calldata amounts) external onlyOwner onlySetup { uint supply = totalSupplyOnPeriod[currentPeriodId]; for (uint i = 0; i < accounts.length; i++) { uint curBalance = balanceOf(accounts[i]); if (curBalance < amounts[i]) { uint amount = amounts[i] - curBalance; _increaseBalance(accounts[i], amount); supply = supply.add(amount); emit Mint(accounts[i], amount); emit Transfer(address(0), accounts[i], amount); } else if (curBalance > amounts[i]) { uint amount = curBalance - amounts[i]; _deductBalance(accounts[i], amount); supply = supply.sub(amount); emit Burn(accounts[i], amount); emit Transfer(accounts[i], address(0), amount); } } totalSupplyOnPeriod[currentPeriodId] = supply; } function finishSetup() external onlyOwner { isInitialized = true; } /* ========== INTERNAL FUNCTIONS ======== */ function _increaseBalance(address account, uint amount) internal { uint accountBalanceCount = balances[account].length; if (accountBalanceCount == 0) { balances[account].push(PeriodBalance(uint128(amount), uint128(currentPeriodId))); } else { uint128 newAmount = uint128(uint(balances[account][accountBalanceCount - 1].amount).add(amount)); if (balances[account][accountBalanceCount - 1].periodId != currentPeriodId) { balances[account].push(PeriodBalance(newAmount, currentPeriodId)); } else { balances[account][accountBalanceCount - 1].amount = newAmount; } } } function _deductBalance(address account, uint amount) internal { uint accountBalanceCount = balances[account].length; require(accountBalanceCount != 0, "SynthetixDebtShare: account has no share to deduct"); uint128 newAmount = uint128(uint(balances[account][accountBalanceCount - 1].amount).sub(amount)); if (balances[account][accountBalanceCount - 1].periodId != currentPeriodId) { balances[account].push(PeriodBalance( newAmount, currentPeriodId )); } else { balances[account][accountBalanceCount - 1].amount = newAmount; } } /* ========== MODIFIERS ========== */ modifier onlyIssuer() { require(msg.sender == requireAndGetAddress(CONTRACT_ISSUER), "SynthetixDebtShare: only issuer can mint/burn"); _; } modifier onlyAuthorizedToSnapshot() { require(authorizedToSnapshot[msg.sender] || msg.sender == requireAndGetAddress(CONTRACT_ISSUER), "SynthetixDebtShare: not authorized to snapshot"); _; } modifier onlyAuthorizedBrokers() { require(authorizedBrokers[msg.sender], "SynthetixDebtShare: only brokers can transferFrom"); _; } modifier onlySetup() { require(!isInitialized, "SynthetixDebt: only callable while still initializing"); _; } /* ========== EVENTS ========== */ event Mint(address indexed account, uint amount); event Burn(address indexed account, uint amount); event Transfer(address indexed from, address indexed to, uint value); event ChangeAuthorizedBroker(address indexed authorizedBroker, bool authorized); event ChangeAuthorizedToSnapshot(address indexed authorizedToSnapshot, bool authorized); }
Contract Security Audit
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[{"inputs":[{"internalType":"address","name":"_owner","type":"address"},{"internalType":"address","name":"_resolver","type":"address"}],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Burn","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"bytes32","name":"name","type":"bytes32"},{"indexed":false,"internalType":"address","name":"destination","type":"address"}],"name":"CacheUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"authorizedBroker","type":"address"},{"indexed":false,"internalType":"bool","name":"authorized","type":"bool"}],"name":"ChangeAuthorizedBroker","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"authorizedToSnapshot","type":"address"},{"indexed":false,"internalType":"bool","name":"authorized","type":"bool"}],"name":"ChangeAuthorizedToSnapshot","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Mint","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"oldOwner","type":"address"},{"indexed":false,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnerChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnerNominated","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"constant":true,"inputs":[],"name":"CONTRACT_NAME","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[],"name":"acceptOwnership","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"target","type":"address"}],"name":"addAuthorizedBroker","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"target","type":"address"}],"name":"addAuthorizedToSnapshot","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"spender","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"pure","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"authorizedBrokers","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"authorizedToSnapshot","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"uint256","name":"periodId","type":"uint256"}],"name":"balanceOfOnPeriod","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"","type":"uint256"}],"name":"balances","outputs":[{"internalType":"uint128","name":"amount","type":"uint128"},{"internalType":"uint128","name":"periodId","type":"uint128"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"burnShare","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"currentPeriodId","outputs":[{"internalType":"uint128","name":"","type":"uint128"}],"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":[],"name":"finishSetup","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address[]","name":"accounts","type":"address[]"},{"internalType":"uint256[]","name":"amounts","type":"uint256[]"}],"name":"importAddresses","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"isInitialized","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"isResolverCached","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"mintShare","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"_owner","type":"address"}],"name":"nominateNewOwner","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"nominatedOwner","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[],"name":"rebuildCache","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"target","type":"address"}],"name":"removeAuthorizedBroker","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"target","type":"address"}],"name":"removeAuthorizedToSnapshot","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"resolver","outputs":[{"internalType":"contract AddressResolver","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"resolverAddressesRequired","outputs":[{"internalType":"bytes32[]","name":"addresses","type":"bytes32[]"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"sharePercent","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"uint256","name":"periodId","type":"uint256"}],"name":"sharePercentOnPeriod","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"uint128","name":"id","type":"uint128"}],"name":"takeSnapshot","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"totalSupplyOnPeriod","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"pure","type":"function"},{"constant":false,"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"}],"payable":false,"stateMutability":"nonpayable","type":"function"}]
Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
000000000000000000000000de910777c787903f78c89e7a0bf7f4c435cbb1fe0000000000000000000000001cb059b7e74fd21665968c908806143e744d5f30
-----Decoded View---------------
Arg [0] : _owner (address): 0xDe910777C787903F78C89e7a0bf7F4C435cBB1Fe
Arg [1] : _resolver (address): 0x1Cb059b7e74fD21665968C908806143E744D5F30
-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 000000000000000000000000de910777c787903f78c89e7a0bf7f4c435cbb1fe
Arg [1] : 0000000000000000000000001cb059b7e74fd21665968c908806143e744d5f30
Library Used
SafeDecimalMath : 0x0142f40c25ce1f1177ed131101fa19217396cb88SystemSettingsLib : 0x478d479bac034f89fa28d8d2ab430ec973a3a0ac
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