ERC-20
Overview
Max Total Supply
10,000,000,000 DODI
Holders
1,257
Total Transfers
-
Market
Onchain Market Cap
$0.00
Circulating Supply Market Cap
-
Other Info
Token Contract (WITH 18 Decimals)
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# | Exchange | Pair | Price | 24H Volume | % Volume |
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Contract Name:
DoubleDiceToken
Compiler Version
v0.8.6+commit.11564f7e
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: UNLICENSED pragma solidity 0.8.6; import "@openzeppelin/contracts/access/Ownable.sol"; import "@openzeppelin/contracts/token/ERC20/ERC20.sol"; import "./IDoubleDiceToken.sol"; /** * ________ * ________ / o o /\ * / o /\/ o /o \ * / o / \o___o_/o \ * /_o_____/o \ \ o/ * \ o o \ o/ o \ o/ * ______ __\ o o \ /\_______\/ _____ ____ ____ ____ _______ * | __ \ / \_o___o_\/ | _ \ | | | ___| | _ \ |_ _| / ___| | ____| * | | \ | | / \ | | | | | | |_| | | | | |_ | | \ | || | / | | * | | | | | | | | | | | | | _ < | | | _| | | | | I| | | | |__ * |D| |D| |O\_/O| |U|_|U| |B|_|B| |L|___ |E|___ |D|_/D| _I|_ |C\___ |EEEEE| * |D|__/DD| \OOO/ \UUU/ |BBBB/ |LLLLL| |EEEEE| |DDDD/ |IIII| \CCCC| |EE|____ * |DDDDDD/ ================================================================ |EEEEEEE| * * @title DoubleDice DODI token contract * @author DoubleDice Team <[email protected]> * @custom:security-contact [email protected] * @notice ERC-20 token extended with special yield-distribution functionality. * * A supply of 10 billion DODI was minted at contract creation: * - 6.3 billion were minted to an initial token holder `initTokenHolder` * - 3.7 billion were minted to a reserved `UNDISTRIBUTED_YIELD_ACCOUNT` address * * It is not possible to mint further DODI beyond the 10 billion DODI minted at contract creation. * * The DODI on the `UNDISTRIBUTED_YIELD_ACCOUNT` is controlled by the `owner()` of this contract. * The `owner()` may choose to: * - Distribute a portion or all of the remaining undistributed yield to token holders via `distributeYield` * - Burn a portion or all of the remaining undistributed yield via `burnUndistributedYield`, * thus decreasing the total DODI supply * * The `owner()` of this contract has no special powers besides the ability * to distribute or burn the 3.7 billion DODI yield. * * When an amount of yield is released from `UNDISTRIBUTED_YIELD_ACCOUNT` to be distributed to token * holders, it is transferred to a second reserved `UNCLAIMED_DISTRIBUTED_YIELD_ACCOUNT` address. * Token holders may then call `claimYield()` to transfer their received yield * from `UNCLAIMED_DISTRIBUTED_YIELD_ACCOUNT` to themselves. * * Different operations affect `balanceOf(account)` and `unclaimedYieldOf(account)` as follows: * - `transfer` and `transferFrom` alter `balanceOf(account)`, * but without altering `unclaimedYieldOf(account)`. * - Unless `account` is explicitly excluded from a distribution, `distributeYield` alters `unclaimedYieldOf(account)`, * but without altering `balanceOf(account)`. * - `claimYield` and `claimYieldFor` alter both `balanceOf(account)` and `unclaimedYieldOf(account)`, * but without altering their sum `balanceOf(account) + unclaimedYieldOf(account)` */ contract DoubleDiceToken is IDoubleDiceToken, ERC20("DoubleDice Token", "DODI"), Ownable { /// @notice Account holding the portion of the 3.7 billion DODI that have not yet been distributed or burned by `owner()` address constant public UNDISTRIBUTED_YIELD_ACCOUNT = 0xD0D1000000000000000000000000000000000001; /// @notice Account holding yield that has been distributed, but not yet claimed by its recipient address constant public UNCLAIMED_DISTRIBUTED_YIELD_ACCOUNT = 0xd0D1000000000000000000000000000000000002; function _isReservedAccount(address account) internal pure returns (bool) { return account == UNDISTRIBUTED_YIELD_ACCOUNT || account == UNCLAIMED_DISTRIBUTED_YIELD_ACCOUNT; } /// @dev Holds unclaimed-yield state for a specific account struct AccountEntry { /// @dev The amount of unclaimed tokens for this account, at the instant it was last updated in /// either `_captureUnclaimedYield()`, or `claimYieldFor()` or `distributeYield()`. uint256 capturedUnclaimedYield; /// @dev The value of `_factor` at the instant `capturedUnclaimedYield` was last updated uint256 factorAtCapture; } /// @dev The state for an account is stored in this mapping in conjunction with /// the ERC-20 balance, which is managed in the base ERC20 contract mapping(address => AccountEntry) internal _entries; /// @dev Sets the precision at which calculations are performed in this contract. /// The larger the value of `ONE`, the more miniscule the rounding errors in this contract. /// With `ONE` set to 1e47, it can be proven that the largest computation in this contract /// will never result in uint256 overflow, given the following 3 assumptions hold true. uint256 constant internal ONE = 1e47; /// @dev Assumption 1 of 3: Holds true because the contract was created with 10 billion * 1e18 tokens uint256 constant private _ASSUMED_MAX_INIT_TOTAL_SUPPLY = 20e9 * 1e18; /// @dev Assumption 2 of 3: Holds true because 10 / (10 - 3.7) = 1.5873 <= 2 uint256 constant private _ASSUMED_MAX_INIT_TOTAL_TO_INIT_CIRCULATING_SUPPLY_RATIO = 2; /// @dev Assumption 3 of 3: Holds true because it is `require`-d in `distributeYield()` uint256 constant private _ASSUMED_MIN_TOTAL_CIRCULATING_TO_EXCLUDED_CIRCULATING_SUPPLY_RATIO = 2; function _checkOverflowProtectionAssumptionsConstructor(uint256 initTotalSupply, uint256 totalYieldAmount) internal pure { require(initTotalSupply <= _ASSUMED_MAX_INIT_TOTAL_SUPPLY, "Broken assumption"); uint256 initCirculatingSupply = initTotalSupply - totalYieldAmount; // C/T = initCirculatingSupply / initTotalSupply >= 0.5 require(initCirculatingSupply * _ASSUMED_MAX_INIT_TOTAL_TO_INIT_CIRCULATING_SUPPLY_RATIO >= initTotalSupply, "Broken assumption"); } function _checkOverflowProtectionAssumptionsDistributeYield(uint256 totalCirculatingSupply, uint256 excludedCirculatingSupply) internal pure { // epsilon = excludedCirculatingSupply / totalCirculatingSupply <= 0.5 require((excludedCirculatingSupply * _ASSUMED_MIN_TOTAL_CIRCULATING_TO_EXCLUDED_CIRCULATING_SUPPLY_RATIO) <= totalCirculatingSupply, "Broken assumption"); } /// @dev Yield distribution to all accounts is recorded by increasing (eagerly) this contract-wide `_factor`, /// and received yield is acknowledged by an `account` by reconciling (lazily) its `_entries[account]` /// with this contract-wide `_factor`. uint256 internal _factor; /// @notice Returns `balanceOf(account) + unclaimedYieldOf(account)` /// @custom:reverts-with "Reserved account" if called for `UNDISTRIBUTED_YIELD_ACCOUNT` or `UNCLAIMED_DISTRIBUTED_YIELD_ACCOUNT` function balancePlusUnclaimedYieldOf(address account) public view returns (uint256) { require(!_isReservedAccount(account), "Reserved account"); AccountEntry storage entry = _entries[account]; return ((ONE + _factor) * (balanceOf(account) + entry.capturedUnclaimedYield)) / (ONE + entry.factorAtCapture); } /// @notice Returns the total yield token amount claimable by `account`. /// @dev The tokens received by `account` during a yield-distribution do not appear immediately on `balanceOf(account)`, /// but they appear instantly on `unclaimedYieldOf(account)` and `balancePlusUnclaimedYieldOf(account)`. /// Transferring tokens from `account` to another account `other` does not affect /// `unclaimedYieldOf(account)` or `unclaimedYieldOf(other)`. /// @custom:reverts-with "Reserved account" if called for `UNDISTRIBUTED_YIELD_ACCOUNT` or `UNCLAIMED_DISTRIBUTED_YIELD_ACCOUNT` function unclaimedYieldOf(address account) public view returns (uint256) { return balancePlusUnclaimedYieldOf(account) - balanceOf(account); } /// @notice Emitted every time the yield claimable by `account` increases by a non-zero amount `byAmount`. /// After `claimYieldFor(account)` is called, the sum of all yield ever claimed for `account`, /// (which equals the total amount ever transferred from `UNCLAIMED_DISTRIBUTED_YIELD` to `account`), /// should equal the sum of `byAmount` over all `UnclaimedYieldIncrease` events ever emitted for `account`. event UnclaimedYieldIncrease(address indexed account, uint256 byAmount); /// @dev The value `unclaimedYieldOf(account)` always reflects exact amount of yield that is claimable by `account`. /// If there is a discrepancy between `unclaimedYieldOf(account)` and the value present in `_entries[account].capturedUnclaimedYield`, /// then this function rectifies that discrepancy while maintaining `balanceOf(account)` and `unclaimedYieldOf(account)` constant. function _captureUnclaimedYield(address account) internal { AccountEntry storage entry = _entries[account]; // _factor can only increase, never decrease assert(entry.factorAtCapture <= _factor); if (entry.factorAtCapture == _factor) { // No yield distribution since last calculation return; } // Recalculate *before* `factorAtCapture` is updated, // because `unclaimedYieldOf` depends on its value pre-update uint256 newUnclaimedYield = unclaimedYieldOf(account); // Update *after* `unclaimedYieldOf` has been calculated entry.factorAtCapture = _factor; // Finally update `capturedUnclaimedYield` uint256 increase = newUnclaimedYield - entry.capturedUnclaimedYield; if (increase > 0) { entry.capturedUnclaimedYield = newUnclaimedYield; emit UnclaimedYieldIncrease(account, increase); } } constructor( uint256 initTotalSupply, uint256 totalYieldAmount, address initTokenHolder ) { require(totalYieldAmount <= initTotalSupply, "Invalid params"); _checkOverflowProtectionAssumptionsConstructor(initTotalSupply, totalYieldAmount); // invoke ERC._mint directly to bypass yield corrections ERC20._mint(UNDISTRIBUTED_YIELD_ACCOUNT, totalYieldAmount); ERC20._mint(initTokenHolder, initTotalSupply - totalYieldAmount); } /// @dev Overriding `_transfer` affects `transfer` and `transferFrom`. /// `_mint` and `_burn` could be overridden in a similar fashion, but are not, /// as all mints and burns are done directly via `ERC20._mint` and `ERC20._burn` /// so as to bypass yield correction. /// @custom:reverts-with "Transfer from reserved account" if `from` is `UNDISTRIBUTED_YIELD_ACCOUNT` or `UNCLAIMED_DISTRIBUTED_YIELD_ACCOUNT` /// @custom:reverts-with "Transfer to reserved account" if `to` is `UNDISTRIBUTED_YIELD_ACCOUNT` or `UNCLAIMED_DISTRIBUTED_YIELD_ACCOUNT` function _transfer(address from, address to, uint256 amount) internal virtual override { require(!_isReservedAccount(from), "Transfer from reserved account"); require(!_isReservedAccount(to), "Transfer to reserved account"); _captureUnclaimedYield(from); _captureUnclaimedYield(to); // invoke ERC._transfer directly to bypass yield corrections ERC20._transfer(from, to, amount); } event YieldDistribution(uint256 yieldDistributed, address[] excludedAccounts); /// @notice Distribute yield to all token holders except `excludedAccounts` /// @custom:reverts-with "Ownable: caller is not the owner" if called by an account that is not `owner()` /// @custom:reverts-with "Duplicate/unordered account" if `excludedAccounts` contains 0-account, /// @custom:reverts-with "Reserved account" if `excludedAccounts` contains `UNDISTRIBUTED_YIELD_ACCOUNT` or `UNCLAIMED_DISTRIBUTED_YIELD_ACCOUNT`, /// is not in ascending order, or contains duplicate addresses. /// @custom:reverts-with "Broken assumption" if the total `balancePlusUnclaimedYieldOf` for all `excludedAccounts` /// exceeds half the circulating supply (which is `totalSupply() - balanceOf(UNDISTRIBUTED_YIELD_ACCOUNT)`). /// @custom:emits-event UnclaimedYieldIncrease if operation results in an increase in `capturedUnclaimedYield` /// for one of the `excludedAccounts` /// @custom:emits-event Transfer(UNDISTRIBUTED_YIELD_ACCOUNT, UNCLAIMED_DISTRIBUTED_YIELD_ACCOUNT, yieldDistributed) /// @custom:emits-event YieldDistribution(amount, excludedAccounts) function distributeYield(uint256 amount, address[] calldata excludedAccounts) external onlyOwner { // ERC20 functions reject mints/transfers to zero-address, // so zero-address can never have balance that we want to exclude from calculations. address prevExcludedAccount = 0x0000000000000000000000000000000000000000; uint256 excludedCirculatingSupply = 0; for (uint256 i = 0; i < excludedAccounts.length; i++) { address account = excludedAccounts[i]; require(prevExcludedAccount < account, "Duplicate/unordered account"); prevExcludedAccount = account; // prepare for next iteration immediately require(!_isReservedAccount(account), "Reserved account"); // The excluded account itself might have a stale `capturedUnclaimedYield` value, // so it is brought up to date with pre-distribution `_factor` _captureUnclaimedYield(account); excludedCirculatingSupply += balancePlusUnclaimedYieldOf(account); } // totalSupply = balanceOfBefore(UNDISTRIBUTED_YIELD) + (sumOfBalanceOfExcluded + balanceOf(UNCLAIMED_DISTRIBUTED_YIELD) + sumOfBalanceOfIncludedBefore) // totalSupply = balanceOfBefore(UNDISTRIBUTED_YIELD) + ( excludedCirculatingSupply + includedCirculatingSupplyBefore ) // totalSupply = balanceOfBefore(UNDISTRIBUTED_YIELD) + ( totalCirculatingSupplyBefore ) uint256 totalCirculatingSupplyBefore = totalSupply() - balanceOf(UNDISTRIBUTED_YIELD_ACCOUNT); _checkOverflowProtectionAssumptionsDistributeYield(totalCirculatingSupplyBefore, excludedCirculatingSupply); // includedCirculatingSupplyBefore = sum(balancePlusUnclaimedYieldOf(account) for account in includedAccounts) uint256 includedCirculatingSupplyBefore = totalCirculatingSupplyBefore - excludedCirculatingSupply; // totalSupply = (balanceBeforeOf(UNDISTRIBUTED_YIELD) ) + ( includedCirculatingSupplyBefore) + (excludedCirculatingSupply) // totalSupply = (balanceBeforeOf(UNDISTRIBUTED_YIELD) - amount) + (amount + includedCirculatingSupplyBefore) + (excludedCirculatingSupply) // totalSupply = ( balanceAfterOf(UNDISTRIBUTED_YIELD) ) + ( includedCirculatingSupplyAfter ) + (excludedCirculatingSupply) uint256 includedCirculatingSupplyAfter = includedCirculatingSupplyBefore + amount; _factor = ((ONE + _factor) * includedCirculatingSupplyAfter) / includedCirculatingSupplyBefore - ONE; for (uint256 i = 0; i < excludedAccounts.length; i++) { // Force this account to "miss out on" this distribution // by "fast-forwarding" its `_factor` to the new value // without actually changing its balance or unclaimedYield _entries[excludedAccounts[i]].factorAtCapture = _factor; } // invoke ERC._transfer directly to bypass yield corrections ERC20._transfer(UNDISTRIBUTED_YIELD_ACCOUNT, UNCLAIMED_DISTRIBUTED_YIELD_ACCOUNT, amount); emit YieldDistribution(amount, excludedAccounts); } /// @notice Burn an `amount` of undistributed yield. /// @custom:reverts-with "Ownable: caller is not the owner" if called by an account that is not `owner()` /// @custom:reverts-with "ERC20: burn amount exceeds balance" if `amount` exceeds `balanceOf(UNDISTRIBUTED_YIELD_ACCOUNT)` /// @custom:emits-event "Transfer(UNDISTRIBUTED_YIELD_ACCOUNT, address(0), amount)" function burnUndistributedYield(uint256 amount) external onlyOwner { // invoke ERC._transfer directly to bypass yield corrections ERC20._burn(UNDISTRIBUTED_YIELD_ACCOUNT, amount); } /// @notice Yield received by `account` from a distribution will be reflected in `balanceOf(account)` /// only after `claimYieldFor(account)` has been called. /// @custom:reverts-with "Reserved account" if called for `UNDISTRIBUTED_YIELD_ACCOUNT` or `UNCLAIMED_DISTRIBUTED_YIELD_ACCOUNT` /// @custom:emits-event UnclaimedYieldIncrease if operation results in an increase in `capturedUnclaimedYield` /// @custom:emits-event Transfer(UNCLAIMED_DISTRIBUTED_YIELD_ACCOUNT, account, unclaimedYieldOf(account)) function claimYieldFor(address account) public { // Without this check (and without the check in balancePlusUnclaimedYieldOf), // it would be possible for anyone to claim yield for one of the reserved accounts, // and this would destabilize the accounting system. require(!_isReservedAccount(account), "Reserved account"); // Not entirely necessary, because ERC20._transfer will block 0-account // from receiving any balance, but it is stopped in its tracks anyway. require(account != address(0), "Zero account"); _captureUnclaimedYield(account); AccountEntry storage entry = _entries[account]; // balanceOf(account) += entry.capturedUnclaimedYield // entry.capturedUnclaimedYield -= entry.capturedUnclaimedYield // => (balanceOf(account) + entry.capturedUnclaimedYield) is invariant ERC20._transfer(UNCLAIMED_DISTRIBUTED_YIELD_ACCOUNT, account, entry.capturedUnclaimedYield); entry.capturedUnclaimedYield = 0; // A `Transfer` event from `UNCLAIMED_DISTRIBUTED_YIELD_ACCOUNT` always signifies a yield-claim, // so no special "YieldClaim" event is emitted } /// @notice Calls `claimYieldFor` for the caller. function claimYield() external override { claimYieldFor(_msgSender()); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "../utils/Context.sol"; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor() { _setOwner(_msgSender()); } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(owner() == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _setOwner(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _setOwner(newOwner); } function _setOwner(address newOwner) private { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "./IERC20.sol"; import "./extensions/IERC20Metadata.sol"; import "../../utils/Context.sol"; /** * @dev Implementation of the {IERC20} interface. * * This implementation is agnostic to the way tokens are created. This means * that a supply mechanism has to be added in a derived contract using {_mint}. * For a generic mechanism see {ERC20PresetMinterPauser}. * * TIP: For a detailed writeup see our guide * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How * to implement supply mechanisms]. * * We have followed general OpenZeppelin Contracts guidelines: functions revert * instead returning `false` on failure. This behavior is nonetheless * conventional and does not conflict with the expectations of ERC20 * applications. * * Additionally, an {Approval} event is emitted on calls to {transferFrom}. * This allows applications to reconstruct the allowance for all accounts just * by listening to said events. Other implementations of the EIP may not emit * these events, as it isn't required by the specification. * * Finally, the non-standard {decreaseAllowance} and {increaseAllowance} * functions have been added to mitigate the well-known issues around setting * allowances. See {IERC20-approve}. */ contract ERC20 is Context, IERC20, IERC20Metadata { mapping(address => uint256) private _balances; mapping(address => mapping(address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; /** * @dev Sets the values for {name} and {symbol}. * * The default value of {decimals} is 18. To select a different value for * {decimals} you should overload it. * * All two of these values are immutable: they can only be set once during * construction. */ constructor(string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; } /** * @dev Returns the name of the token. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5.05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless this function is * overridden; * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view virtual override returns (uint8) { return 18; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view virtual override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public virtual override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { _approve(_msgSender(), spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}. * * Requirements: * * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for ``sender``'s tokens of at least * `amount`. */ function transferFrom( address sender, address recipient, uint256 amount ) public virtual override returns (bool) { _transfer(sender, recipient, amount); uint256 currentAllowance = _allowances[sender][_msgSender()]; require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance"); unchecked { _approve(sender, _msgSender(), currentAllowance - amount); } return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { uint256 currentAllowance = _allowances[_msgSender()][spender]; require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero"); unchecked { _approve(_msgSender(), spender, currentAllowance - subtractedValue); } return true; } /** * @dev Moves `amount` of tokens from `sender` to `recipient`. * * This internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer( address sender, address recipient, uint256 amount ) internal virtual { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(sender, recipient, amount); uint256 senderBalance = _balances[sender]; require(senderBalance >= amount, "ERC20: transfer amount exceeds balance"); unchecked { _balances[sender] = senderBalance - amount; } _balances[recipient] += amount; emit Transfer(sender, recipient, amount); _afterTokenTransfer(sender, recipient, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply += amount; _balances[account] += amount; emit Transfer(address(0), account, amount); _afterTokenTransfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); uint256 accountBalance = _balances[account]; require(accountBalance >= amount, "ERC20: burn amount exceeds balance"); unchecked { _balances[account] = accountBalance - amount; } _totalSupply -= amount; emit Transfer(account, address(0), amount); _afterTokenTransfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve( address owner, address spender, uint256 amount ) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 amount ) internal virtual {} /** * @dev Hook that is called after any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * has been transferred to `to`. * - when `from` is zero, `amount` tokens have been minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens have been burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _afterTokenTransfer( address from, address to, uint256 amount ) internal virtual {} }
// SPDX-License-Identifier: UNLICENSED pragma solidity 0.8.6; import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; interface IDoubleDiceToken is IERC20 { function claimYield() external; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom( address sender, address recipient, uint256 amount ) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "../IERC20.sol"; /** * @dev Interface for the optional metadata functions from the ERC20 standard. * * _Available since v4.1._ */ interface IERC20Metadata is IERC20 { /** * @dev Returns the name of the token. */ function name() external view returns (string memory); /** * @dev Returns the symbol of the token. */ function symbol() external view returns (string memory); /** * @dev Returns the decimals places of the token. */ function decimals() external view returns (uint8); }
{ "optimizer": { "enabled": true, "runs": 200 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
[{"inputs":[{"internalType":"uint256","name":"initTotalSupply","type":"uint256"},{"internalType":"uint256","name":"totalYieldAmount","type":"uint256"},{"internalType":"address","name":"initTokenHolder","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","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"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":false,"internalType":"uint256","name":"byAmount","type":"uint256"}],"name":"UnclaimedYieldIncrease","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"yieldDistributed","type":"uint256"},{"indexed":false,"internalType":"address[]","name":"excludedAccounts","type":"address[]"}],"name":"YieldDistribution","type":"event"},{"inputs":[],"name":"UNCLAIMED_DISTRIBUTED_YIELD_ACCOUNT","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"UNDISTRIBUTED_YIELD_ACCOUNT","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"balancePlusUnclaimedYieldOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"burnUndistributedYield","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"claimYield","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"claimYieldFor","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"subtractedValue","type":"uint256"}],"name":"decreaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address[]","name":"excludedAccounts","type":"address[]"}],"name":"distributeYield","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"addedValue","type":"uint256"}],"name":"increaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"sender","type":"address"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"unclaimedYieldOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"}]
Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
0000000000000000000000000000000000000000204fce5e3e2502611000000000000000000000000000000000000000000000000bf49179e8e9da7af40000000000000000000000000000004b64e8187e44810e828a9e97c2feb01f2e3b8cc6
-----Decoded View---------------
Arg [0] : initTotalSupply (uint256): 10000000000000000000000000000
Arg [1] : totalYieldAmount (uint256): 3700000000000000000000000000
Arg [2] : initTokenHolder (address): 0x4b64e8187E44810e828A9e97c2FeB01F2e3B8cc6
-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000204fce5e3e25026110000000
Arg [1] : 00000000000000000000000000000000000000000bf49179e8e9da7af4000000
Arg [2] : 0000000000000000000000004b64e8187e44810e828a9e97c2feb01f2e3b8cc6
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