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21076904 | 3 days ago | 1,040.44670624 ETH | ||||
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Contract Name:
DragonStake
Compiler Version
v0.8.20+commit.a1b79de6
Optimization Enabled:
Yes with 9999 runs
Other Settings:
paris EvmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: UNLICENSED pragma solidity 0.8.20; // OpenZeppelin import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; import "@openzeppelin/contracts/utils/Address.sol"; import "@openzeppelin/contracts/access/Ownable.sol"; // Library import "./interfaces/ITitanX.sol"; import "../DragonX.sol"; import "./Constants.sol"; /** * @title A contract managed and deployed by DragonX to initialise the maximum amount of stakes per address * @author The DragonX devs * @notice This contract is instantiated by DragonX and will not be deployed as a separate entity */ contract DragonStake is Ownable { using SafeERC20 for IERC20; using SafeERC20 for ITitanX; // ----------------------------------------- // Type declarations // ----------------------------------------- // ----------------------------------------- // State variables // ----------------------------------------- uint256 public openedStakes; // ----------------------------------------- // Errors // ----------------------------------------- /** * @dev Error emitted when a user tries to end a stake but is not mature yet. */ error StakeNotMature(); // ----------------------------------------- // Events // ----------------------------------------- // ----------------------------------------- // Modifiers // ----------------------------------------- // ----------------------------------------- // Constructor // ----------------------------------------- constructor() Ownable(msg.sender) {} // ----------------------------------------- // Receive function // ----------------------------------------- /** * @dev Receive function to handle plain Ether transfers. * Reverts if the sender is not the allowed address. */ receive() external payable { require(msg.sender == TITANX_ADDRESS, "Sender not authorized"); } // ----------------------------------------- // Fallback function // ----------------------------------------- /** * @dev Fallback function to handle non-function calls or Ether transfers if receive() doesn't exist. * Reverts if the sender is not the allowed address. */ fallback() external payable { revert("Fallback triggered"); } // ----------------------------------------- // External functions // ----------------------------------------- /** * TitanX Staking Function * @notice Stakes all available TitanX tokens held by this contract. * @dev Initializes the TitanX contract, calculates the stakable balance, and opens a new stake. * This function can only be called by the contract owner. */ function stake() external onlyOwner { // Initialize TitanX contract reference ITitanX titanX = ITitanX(TITANX_ADDRESS); // Fetch the current balance of TitanX tokens in this contract uint256 amountToStake = titanX.balanceOf(address(this)); // Initiate staking of the fetched amount for the maximum defined stake length titanX.startStake(amountToStake, TITANX_MAX_STAKE_LENGTH); // Increment the count of active stakes openedStakes += 1; } /** * Claim ETH Rewards from TitanX Staking * @notice Allows the contract owner to claim accumulated ETH rewards from TitanX staking. * @dev Retrieves the total claimable ETH amount and, if any, claims it and sends it to the owner's address. * This function can only be called by the contract owner. * @return claimable The total amount of ETH claimed. */ function claim() external onlyOwner returns (uint256 claimable) { // Initialize TitanX contract reference ITitanX titanX = ITitanX(TITANX_ADDRESS); // Determine the total amount of ETH that can be claimed by this contract claimable = titanX.getUserETHClaimableTotal(address(this)); // Proceed with claiming if there is any claimable ETH if (claimable > 0) { // Claim the available ETH from TitanX titanX.claimUserAvailableETHPayouts(); // Transfer the claimed ETH to the contract owner Address.sendValue(payable(owner()), claimable); } } /** * @dev Ends a stake after it has reached its maturity. * * This function interacts with the ITitanX contract to handle stake operations. * It requires the stake ID (sId) to be valid and within the range of opened stakes. * If the current block timestamp is greater than or equal to the stake's maturity timestamp, * the function ends the stake and transfers the unstaked TitanX tokens to the DragonX contract. * If the stake has not yet matured, the function will revert. * * @param sId The ID of the stake to be ended. * @notice The function is callable externally and interacts with ITitanX and IERC20 contracts. * @notice It is required that the stake ID is valid and the stake is matured. * @notice The function will revert if the stake is not matured. */ function endStakeAfterMaturity(uint256 sId) external { ITitanX titanX = ITitanX(TITANX_ADDRESS); require(sId > 0 && sId <= openedStakes, "invalid ID"); UserStakeInfo memory stakeInfo = titanX.getUserStakeInfo( address(this), sId ); // End stake if matured if (block.timestamp >= stakeInfo.maturityTs) { // track TitanX balance uint256 before = titanX.balanceOf(address(this)); // End the stake titanX.endStake(sId); // Send total amount unstaked back to DragonX uint256 unstaked = titanX.balanceOf(address(this)) - before; // Transfer TitanX to DragonX IERC20(TITANX_ADDRESS).safeTransfer(owner(), unstaked); // Update DragonX DragonX(payable(owner())).stakeEnded(unstaked); } else { revert StakeNotMature(); } } /** * Send TitanX Balance to DragonX * * @dev This function transfers any TitanX tokens held by this contract to the owner, * representing the DragonX account. This is a safety mechanism to handle * rare situations where TitanX tokens are accidentally sent to this contract or are * left over from operations like calling `TitanX#endStakeForOthers`. * * It's important to note that this function could lead to slight discrepancies in * DragonX's accounting, specifically in the `totalTitanUnstaked` value - there is * no way to distinguish between TitanX send to this contract by accident or * users calling `TitanX#endStakeForOthers`. * * @notice Use this function to transfer TitanX tokens from the contract to the DragonX * owner address in case of accidental transfers or calling `TitanX#endStakeForOthers` */ function sendTitanX() external { IERC20 titanX = IERC20(TITANX_ADDRESS); // transfer titanX.safeTransfer(owner(), titanX.balanceOf(address(this))); // update the vault DragonX(payable(owner())).updateVault(); } /** * @dev Calculates the total amount of Ethereum claimable by the contract. * Calls `getUserETHClaimableTotal` from the TitanX contract to retrieve the total claimable amount. * @return claimable The total amount of Ethereum claimable by the contract. */ function totalEthClaimable() external view returns (uint256 claimable) { // Initialize TitanX contract reference ITitanX titanX = ITitanX(TITANX_ADDRESS); claimable = titanX.getUserETHClaimableTotal(address(this)); } /** * @dev Determines whether any of the stakes have reached their maturity date. * Iterates through all user stakes and checks if the current block timestamp * is at or past the stake's maturity timestamp. * @return A boolean indicating whether at least one stake has reached maturity. */ function stakeReachedMaturity() external view returns (bool, uint256) { ITitanX titanX = ITitanX(TITANX_ADDRESS); UserStake[] memory stakes = titanX.getUserStakes(address(this)); for (uint256 idx; idx < stakes.length; idx++) { if (block.timestamp > stakes[idx].stakeInfo.maturityTs) { return (true, stakes[idx].sId); } } return (false, 0); } // ----------------------------------------- // Public functions // ----------------------------------------- // ----------------------------------------- // Internal functions // ----------------------------------------- // ----------------------------------------- // Private functions // ----------------------------------------- }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol) pragma solidity ^0.8.20; import {Context} from "../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. * * The initial owner is set to the address provided by the deployer. 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; /** * @dev The caller account is not authorized to perform an operation. */ error OwnableUnauthorizedAccount(address account); /** * @dev The owner is not a valid owner account. (eg. `address(0)`) */ error OwnableInvalidOwner(address owner); event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the address provided by the deployer as the initial owner. */ constructor(address initialOwner) { if (initialOwner == address(0)) { revert OwnableInvalidOwner(address(0)); } _transferOwnership(initialOwner); } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { _checkOwner(); _; } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if the sender is not the owner. */ function _checkOwner() internal view virtual { if (owner() != _msgSender()) { revert OwnableUnauthorizedAccount(_msgSender()); } } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby disabling any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(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 { if (newOwner == address(0)) { revert OwnableInvalidOwner(address(0)); } _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable2Step.sol) pragma solidity ^0.8.20; import {Ownable} from "./Ownable.sol"; /** * @dev Contract module which provides access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * The initial owner is specified at deployment time in the constructor for `Ownable`. This * can later be changed with {transferOwnership} and {acceptOwnership}. * * This module is used through inheritance. It will make available all functions * from parent (Ownable). */ abstract contract Ownable2Step is Ownable { address private _pendingOwner; event OwnershipTransferStarted(address indexed previousOwner, address indexed newOwner); /** * @dev Returns the address of the pending owner. */ function pendingOwner() public view virtual returns (address) { return _pendingOwner; } /** * @dev Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one. * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual override onlyOwner { _pendingOwner = newOwner; emit OwnershipTransferStarted(owner(), newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`) and deletes any pending owner. * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual override { delete _pendingOwner; super._transferOwnership(newOwner); } /** * @dev The new owner accepts the ownership transfer. */ function acceptOwnership() public virtual { address sender = _msgSender(); if (pendingOwner() != sender) { revert OwnableUnauthorizedAccount(sender); } _transferOwnership(sender); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (interfaces/draft-IERC6093.sol) pragma solidity ^0.8.20; /** * @dev Standard ERC20 Errors * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC20 tokens. */ interface IERC20Errors { /** * @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers. * @param sender Address whose tokens are being transferred. * @param balance Current balance for the interacting account. * @param needed Minimum amount required to perform a transfer. */ error ERC20InsufficientBalance(address sender, uint256 balance, uint256 needed); /** * @dev Indicates a failure with the token `sender`. Used in transfers. * @param sender Address whose tokens are being transferred. */ error ERC20InvalidSender(address sender); /** * @dev Indicates a failure with the token `receiver`. Used in transfers. * @param receiver Address to which tokens are being transferred. */ error ERC20InvalidReceiver(address receiver); /** * @dev Indicates a failure with the `spender`’s `allowance`. Used in transfers. * @param spender Address that may be allowed to operate on tokens without being their owner. * @param allowance Amount of tokens a `spender` is allowed to operate with. * @param needed Minimum amount required to perform a transfer. */ error ERC20InsufficientAllowance(address spender, uint256 allowance, uint256 needed); /** * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals. * @param approver Address initiating an approval operation. */ error ERC20InvalidApprover(address approver); /** * @dev Indicates a failure with the `spender` to be approved. Used in approvals. * @param spender Address that may be allowed to operate on tokens without being their owner. */ error ERC20InvalidSpender(address spender); } /** * @dev Standard ERC721 Errors * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC721 tokens. */ interface IERC721Errors { /** * @dev Indicates that an address can't be an owner. For example, `address(0)` is a forbidden owner in EIP-20. * Used in balance queries. * @param owner Address of the current owner of a token. */ error ERC721InvalidOwner(address owner); /** * @dev Indicates a `tokenId` whose `owner` is the zero address. * @param tokenId Identifier number of a token. */ error ERC721NonexistentToken(uint256 tokenId); /** * @dev Indicates an error related to the ownership over a particular token. Used in transfers. * @param sender Address whose tokens are being transferred. * @param tokenId Identifier number of a token. * @param owner Address of the current owner of a token. */ error ERC721IncorrectOwner(address sender, uint256 tokenId, address owner); /** * @dev Indicates a failure with the token `sender`. Used in transfers. * @param sender Address whose tokens are being transferred. */ error ERC721InvalidSender(address sender); /** * @dev Indicates a failure with the token `receiver`. Used in transfers. * @param receiver Address to which tokens are being transferred. */ error ERC721InvalidReceiver(address receiver); /** * @dev Indicates a failure with the `operator`’s approval. Used in transfers. * @param operator Address that may be allowed to operate on tokens without being their owner. * @param tokenId Identifier number of a token. */ error ERC721InsufficientApproval(address operator, uint256 tokenId); /** * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals. * @param approver Address initiating an approval operation. */ error ERC721InvalidApprover(address approver); /** * @dev Indicates a failure with the `operator` to be approved. Used in approvals. * @param operator Address that may be allowed to operate on tokens without being their owner. */ error ERC721InvalidOperator(address operator); } /** * @dev Standard ERC1155 Errors * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC1155 tokens. */ interface IERC1155Errors { /** * @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers. * @param sender Address whose tokens are being transferred. * @param balance Current balance for the interacting account. * @param needed Minimum amount required to perform a transfer. * @param tokenId Identifier number of a token. */ error ERC1155InsufficientBalance(address sender, uint256 balance, uint256 needed, uint256 tokenId); /** * @dev Indicates a failure with the token `sender`. Used in transfers. * @param sender Address whose tokens are being transferred. */ error ERC1155InvalidSender(address sender); /** * @dev Indicates a failure with the token `receiver`. Used in transfers. * @param receiver Address to which tokens are being transferred. */ error ERC1155InvalidReceiver(address receiver); /** * @dev Indicates a failure with the `operator`’s approval. Used in transfers. * @param operator Address that may be allowed to operate on tokens without being their owner. * @param owner Address of the current owner of a token. */ error ERC1155MissingApprovalForAll(address operator, address owner); /** * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals. * @param approver Address initiating an approval operation. */ error ERC1155InvalidApprover(address approver); /** * @dev Indicates a failure with the `operator` to be approved. Used in approvals. * @param operator Address that may be allowed to operate on tokens without being their owner. */ error ERC1155InvalidOperator(address operator); /** * @dev Indicates an array length mismatch between ids and values in a safeBatchTransferFrom operation. * Used in batch transfers. * @param idsLength Length of the array of token identifiers * @param valuesLength Length of the array of token amounts */ error ERC1155InvalidArrayLength(uint256 idsLength, uint256 valuesLength); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/ERC20.sol) pragma solidity ^0.8.20; import {IERC20} from "./IERC20.sol"; import {IERC20Metadata} from "./extensions/IERC20Metadata.sol"; import {Context} from "../../utils/Context.sol"; import {IERC20Errors} from "../../interfaces/draft-IERC6093.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}. * * TIP: For a detailed writeup see our guide * https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How * to implement supply mechanisms]. * * The default value of {decimals} is 18. To change this, you should override * this function so it returns a different value. * * 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. */ abstract contract ERC20 is Context, IERC20, IERC20Metadata, IERC20Errors { mapping(address account => uint256) private _balances; mapping(address account => mapping(address spender => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; /** * @dev Sets the values for {name} and {symbol}. * * 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 returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view virtual 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 default value returned by this function, unless * it's 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 returns (uint8) { return 18; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view virtual returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view virtual returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `to` cannot be the zero address. * - the caller must have a balance of at least `value`. */ function transfer(address to, uint256 value) public virtual returns (bool) { address owner = _msgSender(); _transfer(owner, to, value); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * NOTE: If `value` is the maximum `uint256`, the allowance is not updated on * `transferFrom`. This is semantically equivalent to an infinite approval. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 value) public virtual returns (bool) { address owner = _msgSender(); _approve(owner, spender, value); 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}. * * NOTE: Does not update the allowance if the current allowance * is the maximum `uint256`. * * Requirements: * * - `from` and `to` cannot be the zero address. * - `from` must have a balance of at least `value`. * - the caller must have allowance for ``from``'s tokens of at least * `value`. */ function transferFrom(address from, address to, uint256 value) public virtual returns (bool) { address spender = _msgSender(); _spendAllowance(from, spender, value); _transfer(from, to, value); return true; } /** * @dev Moves a `value` amount of tokens from `from` to `to`. * * 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. * * NOTE: This function is not virtual, {_update} should be overridden instead. */ function _transfer(address from, address to, uint256 value) internal { if (from == address(0)) { revert ERC20InvalidSender(address(0)); } if (to == address(0)) { revert ERC20InvalidReceiver(address(0)); } _update(from, to, value); } /** * @dev Transfers a `value` amount of tokens from `from` to `to`, or alternatively mints (or burns) if `from` * (or `to`) is the zero address. All customizations to transfers, mints, and burns should be done by overriding * this function. * * Emits a {Transfer} event. */ function _update(address from, address to, uint256 value) internal virtual { if (from == address(0)) { // Overflow check required: The rest of the code assumes that totalSupply never overflows _totalSupply += value; } else { uint256 fromBalance = _balances[from]; if (fromBalance < value) { revert ERC20InsufficientBalance(from, fromBalance, value); } unchecked { // Overflow not possible: value <= fromBalance <= totalSupply. _balances[from] = fromBalance - value; } } if (to == address(0)) { unchecked { // Overflow not possible: value <= totalSupply or value <= fromBalance <= totalSupply. _totalSupply -= value; } } else { unchecked { // Overflow not possible: balance + value is at most totalSupply, which we know fits into a uint256. _balances[to] += value; } } emit Transfer(from, to, value); } /** * @dev Creates a `value` amount of tokens and assigns them to `account`, by transferring it from address(0). * Relies on the `_update` mechanism * * Emits a {Transfer} event with `from` set to the zero address. * * NOTE: This function is not virtual, {_update} should be overridden instead. */ function _mint(address account, uint256 value) internal { if (account == address(0)) { revert ERC20InvalidReceiver(address(0)); } _update(address(0), account, value); } /** * @dev Destroys a `value` amount of tokens from `account`, lowering the total supply. * Relies on the `_update` mechanism. * * Emits a {Transfer} event with `to` set to the zero address. * * NOTE: This function is not virtual, {_update} should be overridden instead */ function _burn(address account, uint256 value) internal { if (account == address(0)) { revert ERC20InvalidSender(address(0)); } _update(account, address(0), value); } /** * @dev Sets `value` 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. * * Overrides to this logic should be done to the variant with an additional `bool emitEvent` argument. */ function _approve(address owner, address spender, uint256 value) internal { _approve(owner, spender, value, true); } /** * @dev Variant of {_approve} with an optional flag to enable or disable the {Approval} event. * * By default (when calling {_approve}) the flag is set to true. On the other hand, approval changes made by * `_spendAllowance` during the `transferFrom` operation set the flag to false. This saves gas by not emitting any * `Approval` event during `transferFrom` operations. * * Anyone who wishes to continue emitting `Approval` events on the`transferFrom` operation can force the flag to * true using the following override: * ``` * function _approve(address owner, address spender, uint256 value, bool) internal virtual override { * super._approve(owner, spender, value, true); * } * ``` * * Requirements are the same as {_approve}. */ function _approve(address owner, address spender, uint256 value, bool emitEvent) internal virtual { if (owner == address(0)) { revert ERC20InvalidApprover(address(0)); } if (spender == address(0)) { revert ERC20InvalidSpender(address(0)); } _allowances[owner][spender] = value; if (emitEvent) { emit Approval(owner, spender, value); } } /** * @dev Updates `owner` s allowance for `spender` based on spent `value`. * * Does not update the allowance value in case of infinite allowance. * Revert if not enough allowance is available. * * Does not emit an {Approval} event. */ function _spendAllowance(address owner, address spender, uint256 value) internal virtual { uint256 currentAllowance = allowance(owner, spender); if (currentAllowance != type(uint256).max) { if (currentAllowance < value) { revert ERC20InsufficientAllowance(spender, currentAllowance, value); } unchecked { _approve(owner, spender, currentAllowance - value, false); } } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/extensions/IERC20Metadata.sol) pragma solidity ^0.8.20; import {IERC20} from "../IERC20.sol"; /** * @dev Interface for the optional metadata functions from the ERC20 standard. */ 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); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/extensions/IERC20Permit.sol) pragma solidity ^0.8.20; /** * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612]. * * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't * need to send a transaction, and thus is not required to hold Ether at all. * * ==== Security Considerations * * There are two important considerations concerning the use of `permit`. The first is that a valid permit signature * expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be * considered as an intention to spend the allowance in any specific way. The second is that because permits have * built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should * take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be * generally recommended is: * * ```solidity * function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public { * try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {} * doThing(..., value); * } * * function doThing(..., uint256 value) public { * token.safeTransferFrom(msg.sender, address(this), value); * ... * } * ``` * * Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of * `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also * {SafeERC20-safeTransferFrom}). * * Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so * contracts should have entry points that don't rely on permit. */ interface IERC20Permit { /** * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens, * given ``owner``'s signed approval. * * IMPORTANT: The same issues {IERC20-approve} has related to transaction * ordering also apply here. * * Emits an {Approval} event. * * Requirements: * * - `spender` cannot be the zero address. * - `deadline` must be a timestamp in the future. * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner` * over the EIP712-formatted function arguments. * - the signature must use ``owner``'s current nonce (see {nonces}). * * For more information on the signature format, see the * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP * section]. * * CAUTION: See Security Considerations above. */ function permit( address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external; /** * @dev Returns the current nonce for `owner`. This value must be * included whenever a signature is generated for {permit}. * * Every successful call to {permit} increases ``owner``'s nonce by one. This * prevents a signature from being used multiple times. */ function nonces(address owner) external view returns (uint256); /** * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}. */ // solhint-disable-next-line func-name-mixedcase function DOMAIN_SEPARATOR() external view returns (bytes32); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.20; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @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); /** * @dev Returns the value of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the value of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves a `value` amount of tokens from the caller's account to `to`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address to, uint256 value) 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 a `value` amount of tokens 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 value) external returns (bool); /** * @dev Moves a `value` amount of tokens from `from` to `to` using the * allowance mechanism. `value` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address from, address to, uint256 value) external returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/utils/SafeERC20.sol) pragma solidity ^0.8.20; import {IERC20} from "../IERC20.sol"; import {IERC20Permit} from "../extensions/IERC20Permit.sol"; import {Address} from "../../../utils/Address.sol"; /** * @title SafeERC20 * @dev Wrappers around ERC20 operations that throw on failure (when the token * contract returns false). Tokens that return no value (and instead revert or * throw on failure) are also supported, non-reverting calls are assumed to be * successful. * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract, * which allows you to call the safe operations as `token.safeTransfer(...)`, etc. */ library SafeERC20 { using Address for address; /** * @dev An operation with an ERC20 token failed. */ error SafeERC20FailedOperation(address token); /** * @dev Indicates a failed `decreaseAllowance` request. */ error SafeERC20FailedDecreaseAllowance(address spender, uint256 currentAllowance, uint256 requestedDecrease); /** * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value, * non-reverting calls are assumed to be successful. */ function safeTransfer(IERC20 token, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeCall(token.transfer, (to, value))); } /** * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful. */ function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeCall(token.transferFrom, (from, to, value))); } /** * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value, * non-reverting calls are assumed to be successful. */ function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 oldAllowance = token.allowance(address(this), spender); forceApprove(token, spender, oldAllowance + value); } /** * @dev Decrease the calling contract's allowance toward `spender` by `requestedDecrease`. If `token` returns no * value, non-reverting calls are assumed to be successful. */ function safeDecreaseAllowance(IERC20 token, address spender, uint256 requestedDecrease) internal { unchecked { uint256 currentAllowance = token.allowance(address(this), spender); if (currentAllowance < requestedDecrease) { revert SafeERC20FailedDecreaseAllowance(spender, currentAllowance, requestedDecrease); } forceApprove(token, spender, currentAllowance - requestedDecrease); } } /** * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value, * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval * to be set to zero before setting it to a non-zero value, such as USDT. */ function forceApprove(IERC20 token, address spender, uint256 value) internal { bytes memory approvalCall = abi.encodeCall(token.approve, (spender, value)); if (!_callOptionalReturnBool(token, approvalCall)) { _callOptionalReturn(token, abi.encodeCall(token.approve, (spender, 0))); _callOptionalReturn(token, approvalCall); } } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function _callOptionalReturn(IERC20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that // the target address contains contract code and also asserts for success in the low-level call. bytes memory returndata = address(token).functionCall(data); if (returndata.length != 0 && !abi.decode(returndata, (bool))) { revert SafeERC20FailedOperation(address(token)); } } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). * * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead. */ function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We cannot use {Address-functionCall} here since this should return false // and not revert is the subcall reverts. (bool success, bytes memory returndata) = address(token).call(data); return success && (returndata.length == 0 || abi.decode(returndata, (bool))) && address(token).code.length > 0; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (utils/Address.sol) pragma solidity ^0.8.20; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev The ETH balance of the account is not enough to perform the operation. */ error AddressInsufficientBalance(address account); /** * @dev There's no code at `target` (it is not a contract). */ error AddressEmptyCode(address target); /** * @dev A call to an address target failed. The target may have reverted. */ error FailedInnerCall(); /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.8.20/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { if (address(this).balance < amount) { revert AddressInsufficientBalance(address(this)); } (bool success, ) = recipient.call{value: amount}(""); if (!success) { revert FailedInnerCall(); } } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason or custom error, it is bubbled * up by this function (like regular Solidity function calls). However, if * the call reverted with no returned reason, this function reverts with a * {FailedInnerCall} error. * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCallWithValue(target, data, 0); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { if (address(this).balance < value) { revert AddressInsufficientBalance(address(this)); } (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResultFromTarget(target, success, returndata); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResultFromTarget(target, success, returndata); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResultFromTarget(target, success, returndata); } /** * @dev Tool to verify that a low level call to smart-contract was successful, and reverts if the target * was not a contract or bubbling up the revert reason (falling back to {FailedInnerCall}) in case of an * unsuccessful call. */ function verifyCallResultFromTarget( address target, bool success, bytes memory returndata ) internal view returns (bytes memory) { if (!success) { _revert(returndata); } else { // only check if target is a contract if the call was successful and the return data is empty // otherwise we already know that it was a contract if (returndata.length == 0 && target.code.length == 0) { revert AddressEmptyCode(target); } return returndata; } } /** * @dev Tool to verify that a low level call was successful, and reverts if it wasn't, either by bubbling the * revert reason or with a default {FailedInnerCall} error. */ function verifyCallResult(bool success, bytes memory returndata) internal pure returns (bytes memory) { if (!success) { _revert(returndata); } else { return returndata; } } /** * @dev Reverts with returndata if present. Otherwise reverts with {FailedInnerCall}. */ function _revert(bytes memory returndata) private pure { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly /// @solidity memory-safe-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert FailedInnerCall(); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol) pragma solidity ^0.8.20; /** * @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; } function _contextSuffixLength() internal view virtual returns (uint256) { return 0; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (utils/Create2.sol) pragma solidity ^0.8.20; /** * @dev Helper to make usage of the `CREATE2` EVM opcode easier and safer. * `CREATE2` can be used to compute in advance the address where a smart * contract will be deployed, which allows for interesting new mechanisms known * as 'counterfactual interactions'. * * See the https://eips.ethereum.org/EIPS/eip-1014#motivation[EIP] for more * information. */ library Create2 { /** * @dev Not enough balance for performing a CREATE2 deploy. */ error Create2InsufficientBalance(uint256 balance, uint256 needed); /** * @dev There's no code to deploy. */ error Create2EmptyBytecode(); /** * @dev The deployment failed. */ error Create2FailedDeployment(); /** * @dev Deploys a contract using `CREATE2`. The address where the contract * will be deployed can be known in advance via {computeAddress}. * * The bytecode for a contract can be obtained from Solidity with * `type(contractName).creationCode`. * * Requirements: * * - `bytecode` must not be empty. * - `salt` must have not been used for `bytecode` already. * - the factory must have a balance of at least `amount`. * - if `amount` is non-zero, `bytecode` must have a `payable` constructor. */ function deploy(uint256 amount, bytes32 salt, bytes memory bytecode) internal returns (address addr) { if (address(this).balance < amount) { revert Create2InsufficientBalance(address(this).balance, amount); } if (bytecode.length == 0) { revert Create2EmptyBytecode(); } /// @solidity memory-safe-assembly assembly { addr := create2(amount, add(bytecode, 0x20), mload(bytecode), salt) } if (addr == address(0)) { revert Create2FailedDeployment(); } } /** * @dev Returns the address where a contract will be stored if deployed via {deploy}. Any change in the * `bytecodeHash` or `salt` will result in a new destination address. */ function computeAddress(bytes32 salt, bytes32 bytecodeHash) internal view returns (address) { return computeAddress(salt, bytecodeHash, address(this)); } /** * @dev Returns the address where a contract will be stored if deployed via {deploy} from a contract located at * `deployer`. If `deployer` is this contract's address, returns the same value as {computeAddress}. */ function computeAddress(bytes32 salt, bytes32 bytecodeHash, address deployer) internal pure returns (address addr) { /// @solidity memory-safe-assembly assembly { let ptr := mload(0x40) // Get free memory pointer // | | ↓ ptr ... ↓ ptr + 0x0B (start) ... ↓ ptr + 0x20 ... ↓ ptr + 0x40 ... | // |-------------------|---------------------------------------------------------------------------| // | bytecodeHash | CCCCCCCCCCCCC...CC | // | salt | BBBBBBBBBBBBB...BB | // | deployer | 000000...0000AAAAAAAAAAAAAAAAAAA...AA | // | 0xFF | FF | // |-------------------|---------------------------------------------------------------------------| // | memory | 000000...00FFAAAAAAAAAAAAAAAAAAA...AABBBBBBBBBBBBB...BBCCCCCCCCCCCCC...CC | // | keccak(start, 85) | ↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑ | mstore(add(ptr, 0x40), bytecodeHash) mstore(add(ptr, 0x20), salt) mstore(ptr, deployer) // Right-aligned with 12 preceding garbage bytes let start := add(ptr, 0x0b) // The hashed data starts at the final garbage byte which we will set to 0xff mstore8(start, 0xff) addr := keccak256(start, 85) } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (utils/ReentrancyGuard.sol) pragma solidity ^0.8.20; /** * @dev Contract module that helps prevent reentrant calls to a function. * * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier * available, which can be applied to functions to make sure there are no nested * (reentrant) calls to them. * * Note that because there is a single `nonReentrant` guard, functions marked as * `nonReentrant` may not call one another. This can be worked around by making * those functions `private`, and then adding `external` `nonReentrant` entry * points to them. * * TIP: If you would like to learn more about reentrancy and alternative ways * to protect against it, check out our blog post * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul]. */ abstract contract ReentrancyGuard { // Booleans are more expensive than uint256 or any type that takes up a full // word because each write operation emits an extra SLOAD to first read the // slot's contents, replace the bits taken up by the boolean, and then write // back. This is the compiler's defense against contract upgrades and // pointer aliasing, and it cannot be disabled. // The values being non-zero value makes deployment a bit more expensive, // but in exchange the refund on every call to nonReentrant will be lower in // amount. Since refunds are capped to a percentage of the total // transaction's gas, it is best to keep them low in cases like this one, to // increase the likelihood of the full refund coming into effect. uint256 private constant NOT_ENTERED = 1; uint256 private constant ENTERED = 2; uint256 private _status; /** * @dev Unauthorized reentrant call. */ error ReentrancyGuardReentrantCall(); constructor() { _status = NOT_ENTERED; } /** * @dev Prevents a contract from calling itself, directly or indirectly. * Calling a `nonReentrant` function from another `nonReentrant` * function is not supported. It is possible to prevent this from happening * by making the `nonReentrant` function external, and making it call a * `private` function that does the actual work. */ modifier nonReentrant() { _nonReentrantBefore(); _; _nonReentrantAfter(); } function _nonReentrantBefore() private { // On the first call to nonReentrant, _status will be NOT_ENTERED if (_status == ENTERED) { revert ReentrancyGuardReentrantCall(); } // Any calls to nonReentrant after this point will fail _status = ENTERED; } function _nonReentrantAfter() private { // By storing the original value once again, a refund is triggered (see // https://eips.ethereum.org/EIPS/eip-2200) _status = NOT_ENTERED; } /** * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a * `nonReentrant` function in the call stack. */ function _reentrancyGuardEntered() internal view returns (bool) { return _status == ENTERED; } }
// SPDX-License-Identifier: UNLICENSED pragma solidity 0.8.20; // OpenZeppelin import "@openzeppelin/contracts/token/ERC20/ERC20.sol"; import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; import "@openzeppelin/contracts/utils/Address.sol"; import "@openzeppelin/contracts/utils/Create2.sol"; import "@openzeppelin/contracts/access/Ownable2Step.sol"; import "@openzeppelin/contracts/utils/ReentrancyGuard.sol"; // Library import "./lib/DragonStake.sol"; import "./lib/Constants.sol"; import "./lib/Types.sol"; import "./lib/interfaces/ITitanX.sol"; /** * @title The DragonX Contranct * @author The DragonX devs */ contract DragonX is ERC20, Ownable2Step, ReentrancyGuard { using SafeERC20 for IERC20; using SafeERC20 for ITitanX; // ----------------------------------------- // Type declarations // ----------------------------------------- // ----------------------------------------- // State variables // ----------------------------------------- /** * @notice The TitanX buy contract address. * Set at runtime, this address allows for upgrading the buy contract version. */ address public titanBuyAddress; /** * @notice The DragonX buy and burn contract address. * Set at runtime, this allows for upgrading the DragonX buy and burn contract. */ address public dragonBuyAndBurnAddress; /** * @notice The start time of the mint phase, expressed in UTC seconds. * Indicates when the minting phase for tokens begins. */ uint256 public mintPhaseBegin; /** * @notice The end time of the mint phase, expressed in UTC seconds. * Indicates when the minting phase for tokens ends. */ uint256 public mintPhaseEnd; /** * @notice mint ratios from launch for 84 days (12 weeks) */ uint256 public constant mintRatioWeekOne = BASIS; uint256 public constant mintRatioWeekTwo = BASIS; uint256 public constant mintRatioWeekThree = 9500; uint256 public constant mintRatioWeekFour = 9000; uint256 public constant mintRatioWeekFive = 8500; uint256 public constant mintRatioWeekSix = 8000; uint256 public constant mintRatioWeekSeven = 7500; uint256 public constant mintRatioWeekEight = 7000; uint256 public constant mintRatioWeekNine = 6500; uint256 public constant mintRatioWeekTen = 6000; uint256 public constant mintRatioWeekEleven = 5500; uint256 public constant mintRatioWeekTwelve = 5000; /** * @notice The time when it's possible to open a new TitanX stake after the cooldown. * This cooldown period controls the frequency of new stakes being initiated. */ uint256 public nextStakeTs; /** * @notice The number of DragonStake contracts that have been deployed. * Tracks how many DragonStake contracts exist within the system. */ uint256 public numDragonStakeContracts; /** * @notice The address of the currently active DragonStake contract instance. * This contract is used for initiating new TitanX stakes. */ address public activeDragonStakeContract; /** * @notice A mapping from an ID to a deployed instance of the DragonStake contract. * The index starts at zero. Use a loop to iterate through instances, e.g., for(uint256 idx = 0; idx < numDragonStakeContracts; idx++). */ mapping(uint256 => address) public dragonStakeContracts; /** * @notice The amount of TitanX currently held by this contract and not used in stakes. * Represents the reserve of TitanX tokens that are available but not currently staked. */ uint256 public vault; /** * @notice The total amount of Titan staked by DragonX */ uint256 public totalTitanStaked; /** * @notice The total amount of Titan unstaked by DragonX */ uint256 public totalTitanUnstaked; /** * @notice The total amount of ETH claimed by DragonX */ uint256 public totalEthClaimed; /** * Indicates that the initial liquidity has been minted */ InitialLiquidityMinted public initalLiquidityMinted; /** * @dev Mapping of amounts allocated to the genesis address held by this contract. * - address(0): Represents the ETH allocated. * - address(TitanX): Represents the TitanX tokens allocated. * - address(this): Represents the DragonX tokens allocated. */ mapping(address => uint256) private _genesisVault; /** * @dev Mapping of address to bool indicating if an address is allowed to send ETH * to DragonX limiting EOA addresses from accidently sending ETH to DragonX */ mapping(address => bool) private _receiveEthAllowlist; /** * @dev Mapping of address to bool indicating if an address is a DragonStake instance */ mapping(address => bool) private _dragonStakeAllowlist; // ----------------------------------------- // Events // ----------------------------------------- /** * @dev Event emitted when a new Dragon stake instance is created. * @param stakeContractId Unique identifier of the stake contract. * @param stakeContractAddress Address of the newly created stake contract. */ event DragonStakeInstanceCreated( uint256 indexed stakeContractId, address indexed stakeContractAddress ); /** * @notice Emitted when staking rewards are claimed. * @param caller The address of the caller who initiated the transaction. * @param totalClaimed The total amount of ETH claimed. * @param titanBuy Amount transfered to TitanBuy. * @param dragonBuyAndBurn Amount transfered to DragonBuyAndBurn * @param genesis Amount accounted to genesis * @param incentiveFee Incentive see send to caller * (this might include the incentice for calling triggerPayouts on TitanX) */ event Claimed( address indexed caller, uint256 indexed totalClaimed, uint256 titanBuy, uint256 dragonBuyAndBurn, uint256 genesis, uint256 incentiveFee ); /** * @notice Emitted when a new TitanX stake is opened by Dragonx * @param dragonStakeAddress The DragonStake instance used for this stake * @param amount The amount staked */ event TitanStakeStarted(address indexed dragonStakeAddress, uint256 amount); /** * @notice Emitted when TitanX stakes are ended by Dragonx * @param dragonStakeAddress The DragonStake instance used for this action * @param amount The amount unstaked */ event TitanStakesEnded(address indexed dragonStakeAddress, uint256 amount); // ----------------------------------------- // Errors // ----------------------------------------- /** * @dev Error emitted when a user tries to mint but the minting phase has not started. * This prevents actions related to minting before the official commencement of the minting period. */ error MintingNotYetActive(); /** * @dev Error when a user tries to mint but the minting phase has ended. * This ensures minting operations are restricted to the designated minting timeframe. */ error MintingPeriodOver(); /** * @dev Emitted when a user tries to mint but the TitanX allowance for this contract is too low. * Indicates that the contract does not have enough TitanX tokens allocated to it for the minting operation. */ error InsufficientTitanXAllowance(); /** * @dev Emitted when a user tries to mint without having enough TitanX tokens. * This ensures that users have a sufficient balance of TitanX tokens to perform the minting operation. */ error InsufficientTitanXBalance(); /** * @dev Error emitted when the stake function is currently in the cooldown period and cannot be called. * This enforces a waiting period before the stake function can be executed again. */ error CooldownPeriodActive(); /** * @dev Emitted when no additional stakes can be opened. * This is triggered when the maximum limit of open stakes is reached. */ error NoAdditionalStakesAllowed(); /** * @dev Error emitted when there is no ETH claimable by the function caller. * This ensures that the claim operation is only performed when there is ETH available to be claimed. */ error NoEthClaimable(); /** * @dev Error emitted when there are no tokens available to stake. * This ensures that the staking operation is only executed when there are tokens to be staked. */ error NoTokensToStake(); /** * @dev Error emitted when there is no need for creating a new Dragon stake instance. * This occurs when attempting to create a redundant Dragon stake instance. */ error NoNeedForNewDragonStakeInstance(); /** * @dev Error emitted when an invalid address is given to a function. * This occurs when the genesis address manages an address and passes address(0) by accident. */ error InvalidAddress(); /** * @dev Error emitted when a user attempts to mint but the initial liquidity has net yet been mined */ error LiquidityNotMintedYet(); /** * @dev Thrown when the function caller is not authorized or expected. */ error InvalidCaller(); // ----------------------------------------- // Modifiers // ----------------------------------------- /** * @dev Modifier to restrict function access to allowed DragonStake contracts. * * This modifier ensures that the function can only be called by addresses that are * present in the `_dragonStakeAllowlist`. If the calling address is not on the allowlist, * the transaction will revert with the message "not allowed". * @notice Use this modifier to restrict function access to specific addresses only. */ modifier onlyDragonStake() { require(_dragonStakeAllowlist[_msgSender()], "not allowed"); _; } // ----------------------------------------- // Constructor // ----------------------------------------- /** * @notice Constructor for the DragonX ERC20 Token Contract. * @dev Initializes the contract, sets up the minting phase, and deploys the first DragonStake instance. * - Inherits from ERC20 and sets token name to "DragonX" and symbol to "DRAGONX". * - Calculates and sets the start and end times for the minting phase based on current time. * - Sets the time for the next restake opportunity. * - Deploys the first DragonStake contract instance. * - Transfers ownership to contract deployer. * - Set the initial TitanBuy and DragonBuyAndBurn contract addresses. * @param titanBuyAddress_ The address of the TitanBuy contract instance. * @param dragonBuyAndBurnAdddress_ The address of the DragonBuyAndBurn contract instance. */ constructor( address titanBuyAddress_, address dragonBuyAndBurnAdddress_ ) ERC20("DragonX", "DRAGONX") Ownable(msg.sender) { if (titanBuyAddress_ == address(0)) { revert InvalidAddress(); } if (dragonBuyAndBurnAdddress_ == address(0)) { revert InvalidAddress(); } // Deploy stake contract instance setting DragonX as its owner _deployDragonStakeInstance(); // Set contract addresses titanBuyAddress = titanBuyAddress_; dragonBuyAndBurnAddress = dragonBuyAndBurnAdddress_; // set other states initalLiquidityMinted = InitialLiquidityMinted.No; // Allow TitanX to send ETH to DragonX (incentive fee) _receiveEthAllowlist[TITANX_ADDRESS] = true; } // ----------------------------------------- // Receive function // ----------------------------------------- /** * @dev Receive function to handle plain Ether transfers. * Reverts if the sender is not one of the DragonStake contracts. */ receive() external payable { require(_receiveEthAllowlist[msg.sender], "Sender not authorized"); } // ----------------------------------------- // Fallback function // ----------------------------------------- /** * @dev Fallback function to handle non-function calls or Ether transfers if receive() doesn't exist. * Always revert */ fallback() external { revert("Fallback triggered"); } // ----------------------------------------- // External functions // ----------------------------------------- /** * This function enables the minting of DragonX tokens in exchange for TitanX. * Users can transfer TitanX to the DragonX contract to mint an equivalent amount of DragonX tokens. * The minting process is available only during a specified time frame. * When minting, 8% of the total minted DragonX supply and 8% of the TitanX used for minting * are allocated to the genesis address. The remaining TitanX is retained within the contract. * Minting starts once the initial liquidity has been minted (indicating all other contracts) * have been deployed and initialized successfully by the genesis address. * @param amount The amount of DragonX tokens to be minted. */ function mint(uint256 amount) external { // Cache state variables uint256 mintPhaseBegin_ = mintPhaseBegin; // To avoid being frontrun, minting creating DragonX tokens will only // be able once the inital liqudiity ahs been created if (initalLiquidityMinted != InitialLiquidityMinted.Yes) { revert LiquidityNotMintedYet(); } // Check if the minting phase is currently active if (block.timestamp < mintPhaseBegin_) { revert MintingNotYetActive(); } if (block.timestamp > mintPhaseEnd) { revert MintingPeriodOver(); } ITitanX titanX = ITitanX(TITANX_ADDRESS); // Ensure the user has sufficient TitanX and has granted enough allowance if (titanX.allowance(_msgSender(), address(this)) < amount) { revert InsufficientTitanXAllowance(); } if (titanX.balanceOf(_msgSender()) < amount) { revert InsufficientTitanXBalance(); } // Transfer TitanX from the user to this contract titanX.safeTransferFrom(_msgSender(), address(this), amount); uint256 ratio; if (block.timestamp < mintPhaseBegin_ + 7 days) { // week 1 ratio = mintRatioWeekOne; } else if (block.timestamp < mintPhaseBegin_ + 14 days) { // week 2 ratio = mintRatioWeekTwo; } else if (block.timestamp < mintPhaseBegin_ + 21 days) { // week 3 ratio = mintRatioWeekThree; } else if (block.timestamp < mintPhaseBegin_ + 28 days) { // week 4 ratio = mintRatioWeekFour; } else if (block.timestamp < mintPhaseBegin_ + 35 days) { // week 5 ratio = mintRatioWeekFive; } else if (block.timestamp < mintPhaseBegin_ + 42 days) { // week 6 ratio = mintRatioWeekSix; } else if (block.timestamp < mintPhaseBegin_ + 49 days) { // week 7 ratio = mintRatioWeekSeven; } else if (block.timestamp < mintPhaseBegin_ + 56 days) { // week 8 ratio = mintRatioWeekEight; } else if (block.timestamp < mintPhaseBegin_ + 63 days) { // weeek 9 ratio = mintRatioWeekNine; } else if (block.timestamp < mintPhaseBegin_ + 70 days) { // week 10 ratio = mintRatioWeekTen; } else if (block.timestamp < mintPhaseBegin_ + 77 days) { // week 11 ratio = mintRatioWeekEleven; } else { // week 12 ratio = mintRatioWeekTwelve; } // calculate the amount to mint uint256 mintAmount = (amount * ratio) / BASIS; // Mint an equivalent amount of DragonX tokens _mint(_msgSender(), mintAmount); // Calculate and mint the genesis 8% share (of total supply minted) uint256 dragonGenesisShare = (mintAmount * 800) / BASIS; _mint(address(this), dragonGenesisShare); // Allocate 8% of DragonX to the genesis vault _genesisVault[address(this)] += dragonGenesisShare; // Allocate 8% of total TitanX send to DragonX to genesis vault uint256 titanGenesisShare = (amount * 800) / BASIS; _genesisVault[address(titanX)] += titanGenesisShare; // Retain the remaining TitanX within the contract's vault vault += amount - titanGenesisShare; } /** * This function allows users to open a new TitanX stake through the DragonX contract. * Each stake runs for the maximum duration, and upon completion, the TitanX is burned. * * A stake can be opened when either of the following conditions is met: * 1. The vault has sufficient TitanX tokens to achieve the maximum 'bigger pays better' bonus. * 2. If the vault doesn't have enough tokens, the function can be invoked after a cooldown * period of 1 week. This delay allows the accumulation of sufficient TitanX to gain * the 'bigger pays better' bonus. */ function stake() external { DragonStake dragonStake = DragonStake( payable(activeDragonStakeContract) ); if (dragonStake.openedStakes() >= TITANX_MAX_STAKE_PER_WALLET) { revert NoAdditionalStakesAllowed(); } updateVault(); // Cache state variables uint256 vault_ = vault; if (vault_ == 0) { revert NoTokensToStake(); } if (vault_ >= TITANX_BPB_MAX_TITAN) { // Start a stake using the currently active DragonStake instance _startStake(); // Schedule the next possible stake after a 7-day cooldown period nextStakeTs = block.timestamp + 7 days; } else { // If the vault lacks sufficient TitanX, a stake can be opened only // after a cooldown period of 7 days to allow for token accumulation. if (block.timestamp < nextStakeTs) { revert CooldownPeriodActive(); } // Start a new stake using the currently active DragonStake instance _startStake(); // Schedule the next possible stake after a 7-day cooldown period. nextStakeTs = block.timestamp + 7 days; } } /** * Claim Function for ETH Rewards * This function claims ETH rewards based on TitanX stakes and allocates them according to predefined shares. * @dev The function performs the following operations: * 1. Retrieves the claimable ETH amount from TitanX stakes. * 2. Validates if there is any ETH to claim, and reverts if none is available. * 3. Claims the available ETH payouts. * 4. Calculates and distributes the ETH according to predefined shares: * - 8% is allocated as a genesis share. * - 3% is sent as a tip to the caller of the function. * - 44.5% is used for buying and burning DragonX tokens. * - The remaining 44.5% is used for buying and burning TitanX tokens. * 5. Updates the respective vaults with their allocated shares. * 6. Sends the tip to the caller of the function. */ function claim() external nonReentrant returns (uint256 claimedAmount) { //prevent contract accounts (bots) from calling this function if (msg.sender != tx.origin) { revert InvalidCaller(); } // Trigger payouts on TitanX // This potentially sends an incentive fee to DragonX // The incentive fee is transparently forwarded to the caller uint256 ethBalanceBefore = address(this).balance; ITitanX(TITANX_ADDRESS).triggerPayouts(); uint256 triggerPayoutsIncentiveFee = address(this).balance - ethBalanceBefore; // Retrieve the total claimable ETH amount. for (uint256 idx; idx < numDragonStakeContracts; idx++) { DragonStake dragonStake = DragonStake( payable(dragonStakeContracts[idx]) ); claimedAmount += dragonStake.claim(); } // Check if there is any claimable ETH, revert if none. if (claimedAmount == 0) { revert NoEthClaimable(); } // Calculate the genesis share (8%). uint256 genesisShare = (claimedAmount * 800) / BASIS; // Calculate the tip for the caller (3%). uint256 incentiveFee = (claimedAmount * INCENTIVE_FEE) / BASIS; // Calculate the Buy and Burn share for DragonX (44.5%). uint256 buyAndBurnDragonX = (claimedAmount * 4450) / BASIS; // Calculate the Buy and Burn share for TitanX (remainder, ~44.5%). uint256 buyTitanX = claimedAmount - genesisShare - buyAndBurnDragonX - incentiveFee; // Update the genesis vault with the genesis share. _genesisVault[address(0)] += genesisShare; // Send to the Buy and Burn contract for DragonX. Address.sendValue(payable(dragonBuyAndBurnAddress), buyAndBurnDragonX); // Send to the buy contract for TitanX. Address.sendValue(payable(titanBuyAddress), buyTitanX); // Send the tip to the function caller. address sender = _msgSender(); Address.sendValue( payable(sender), incentiveFee + triggerPayoutsIncentiveFee ); // update state totalEthClaimed += claimedAmount; // Emit event emit Claimed( sender, claimedAmount, buyTitanX, buyAndBurnDragonX, genesisShare, incentiveFee + triggerPayoutsIncentiveFee ); } /** * @notice Factory function to deploy a new DragonStake contract instance. * @dev This function deploys a new DragonStake instance if the number of open stakes in the current * active instance exceeds the maximum allowed per wallet. * It reverts with NoNeedForNewDragonStakeInstance if the condition is not met. * Only callable externally. */ function deployNewDragonStakeInstance() external { DragonStake dragonStake = DragonStake( payable(activeDragonStakeContract) ); // Check if the maximum number of stakes per wallet has been reached if (dragonStake.openedStakes() < TITANX_MAX_STAKE_PER_WALLET) { revert NoNeedForNewDragonStakeInstance(); } // Deploy a new DragonStake instance _deployDragonStakeInstance(); } /** * @notice Mints the initial liquidity for the DragonX token. * @dev This function mints a specified amount of tokens and sets up the minting phases. * It can only be called once by the authorized address. * @param amount The amount of DragonX tokens to be minted for initial liquidity. */ function mintInitialLiquidity(uint256 amount) external { // Cache state variables address dragonBuyAndBurnAddress_ = dragonBuyAndBurnAddress; // Verify that the caller is authorized to mint initial liquidity require(msg.sender == dragonBuyAndBurnAddress_, "not authorized"); // Ensure that initial liquidity hasn't been minted before require( initalLiquidityMinted == InitialLiquidityMinted.No, "already minted" ); // Mint the specified amount of DragonX tokens to the authorized address _mint(dragonBuyAndBurnAddress_, amount); // Update the state to reflect that initial liquidity has been minted initalLiquidityMinted = InitialLiquidityMinted.Yes; // Set up the minting phase timings uint256 currentTimestamp = block.timestamp; uint256 secondsUntilMidnight = 86400 - (currentTimestamp % 86400); // The mint phase is open for 84 days (12 weeks) and begins at midnight // once contracts are fully set up uint256 mintPhaseBegin_ = currentTimestamp + secondsUntilMidnight; // Update storage mintPhaseBegin = mintPhaseBegin_; // Set mint phase end mintPhaseEnd = mintPhaseBegin_ + 84 days; // Allow the first stake after 7 days of mint-phase begin nextStakeTs = mintPhaseBegin_ + 7 days; } /** * Token Burn Function * @notice Allows a token holder to burn all of their tokens. * @dev Burns the entire token balance of the caller. This function calls `_burn` * with the caller's address and their full token balance. * This function can be called by any token holder wishing to burn their tokens. * Tokens burned are permanently removed from the circulation. * @custom:warning WARNING: This function will irreversibly burn all tokens in the caller's account. * Ensure you understand the consequences before calling. */ function burn() external { address sender = _msgSender(); _burn(sender, balanceOf(sender)); } /** * @notice Calculates the total number of stakes opened across all DragonStake contract instances. * @dev This function iterates over all the DragonStake contract instances recorded in the contract: * 1. For each DragonStake contract, it gets a reference to the contract instance. * 2. It then calls the `openedStakes` function on each instance to get the number of opened stakes. * 3. These values are summed up to calculate the total number of stakes opened across all instances. * @return totalStakes The total number of stakes opened across all DragonStake contract instances. */ function totalStakesOpened() external view returns (uint256 totalStakes) { // Iterate over all DragonStake contract instances for (uint256 idx; idx < numDragonStakeContracts; idx++) { // Get a reference to each DragonStake contract DragonStake dragonStake = DragonStake( payable(dragonStakeContracts[idx]) ); // Add the stakes opened by this DragonStake instance totalStakes += dragonStake.openedStakes(); } } /** * @dev Calculate the incentive fee a user will receive for calling the claim function. * This function computes the fee based on the total amount of Ethereum claimable * and a predefined incentive fee rate. * * @notice Used to determine the fee awarded for claiming Ethereum. * * @return fee The calculated incentive fee, represented as a uint256. * This value is calculated by taking the product of `totalEthClaimable()` and * `INCENTIVE_FEE`, then dividing by `BASIS` to normalize the fee calculation. */ function incentiveFeeForClaim() external view returns (uint256 fee) { fee = (totalEthClaimable() * INCENTIVE_FEE) / BASIS; } /** * @dev Checks all DragonStake contract instances to determine if any stake has reached maturity. * Iterates through each DragonStake contract instance and checks for stakes that have reached maturity. * If a stake has reached maturity in a particular instance, it returns true along with the instance's address and the ID. * If no stakes have reached maturity in any instance, it returns false and a zero address and zero for the ID. * @return hasStakesToEnd A boolean indicating if there is at least one stake that has reached maturity. * @return instanceAddress The address of the DragonStake contract instance that has a stake which reached maturity. * @return sId The ID of the stake which reached maturity * Returns zero address if no such instance is found. * @notice This function is used to identify if and where stakes have reached maturity across multiple contract instances. */ function stakeReachedMaturity() external view returns (bool hasStakesToEnd, address instanceAddress, uint256 sId) { // Iterate over all DragonStake contract instances for (uint256 idx; idx < numDragonStakeContracts; idx++) { address instance = dragonStakeContracts[idx]; // Get a reference to each DragonStake contract DragonStake dragonStake = DragonStake(payable(instance)); (bool reachedMaturity, uint256 id) = dragonStake .stakeReachedMaturity(); // Exit if this instance contains a stake that reached maturity if (reachedMaturity) { return (true, instance, id); } } return (false, address(0), 0); } /** * @dev Sets the address used for buying and burning DRAGONX tokens. * @notice This function can only be called by the contract owner. * @param dragonBuyAndBurn The address to be set for the DRAGONX buy and burn operation. * If this address is the zero address, the transaction is reverted. * @custom:throws InvalidAddress if the provided address is the zero address. */ function setDragonBuyAndBurnAddress( address dragonBuyAndBurn ) external onlyOwner { if (dragonBuyAndBurn == address(0)) { revert InvalidAddress(); } dragonBuyAndBurnAddress = dragonBuyAndBurn; } /** * @dev Sets the address used for buying TITANX tokens. * @notice This function can only be called by the contract owner. * @param titanBuy The address to be set for the TITANX buy operation. * If this address is the zero address, the transaction is reverted. * @custom:throws InvalidAddress if the provided address is the zero address. */ function setTitanBuyAddress(address titanBuy) external onlyOwner { if (titanBuy == address(0)) { revert InvalidAddress(); } titanBuyAddress = titanBuy; } /** * @notice Transfers the accumulated balance of a specified asset from the Genesis Vault to the owner. * @dev This function allows the contract owner to claim assets accumulated in the Genesis Vault. It supports both Ether and ERC20 tokens. * The function performs the following operations: * 1. Retrieves the balance of the specified asset from the `_genesisVault`. * 2. Sets the balance of the asset in the vault to zero, effectively resetting it. * 3. Checks that the retrieved balance is greater than zero, and reverts if it's not. * 4. If the asset is Ether (denoted by `asset` being the zero address), it transfers the Ether to the owner using `Address.sendValue`. * 5. If the asset is an ERC20 token, it transfers the token amount to the owner using `safeTransfer` from the ERC20 token's contract. * @param asset The address of the asset to be claimed. A zero address indicates Ether, and a non-zero address indicates an ERC20 token. */ function claimGenesis(address asset) external onlyOwner { uint256 balance = _genesisVault[asset]; _genesisVault[asset] = 0; require(balance > 0, "no balance"); if (asset == address(0)) { Address.sendValue(payable(owner()), balance); } else { IERC20 erc20 = IERC20(asset); erc20.safeTransfer(owner(), balance); } } /** * @dev Updates the state when a TitanX stake has ended and the tokens are unstaked. * * This function should be called after unstaking TitanX tokens. It updates the vault * and the total amount of TitanX tokens that have been unstaked. This function can only * be called by an address that is allowed to end stakes (enforced by the `onlyDragonStake` modifier). * * @param amountUnstaked The amount of TitanX tokens that have been unstaked. * @notice This function is callable externally but restricted to allowed addresses (DragonStake contracts). * @notice It emits the `TitanStakesEnded` event after updating the total unstaked amount. */ function stakeEnded(uint256 amountUnstaked) external onlyDragonStake { // Update vault (TitanX is transfered to DragonX) updateVault(); // Update state totalTitanUnstaked += amountUnstaked; // Emit event emit TitanStakesEnded(_msgSender(), amountUnstaked); } // ----------------------------------------- // Public functions // ----------------------------------------- /** * @notice Updates the vault balance based on the current TITANX token balance. * @dev This function calculates the vault balance by subtracting the initial * balance of TITANX tokens stored in `_genesisVault` from the current balance of * TITANX tokens held by this contract. * Steps involved in the function: * 1. Create an instance of the IERC20 interface for the TITANX token. * 2. Fetch the current TITANX token balance of this contract. * 3. Subtract the initial TITANX token balance (recorded in `_genesisVault`) * from the current balance. * 4. Update the `vault` variable with the resulting value. * The `vault` variable represents the net amount of TITANX tokens that have * been accumulated in this contract since its inception (excluding the initial amount). * This function should be called to reflect the latest state of the vault balance. */ function updateVault() public { IERC20 titanX = IERC20(TITANX_ADDRESS); uint256 balance = titanX.balanceOf(address(this)); vault = balance - _genesisVault[address(titanX)]; } /** * @notice Calculates the total amount of ETH claimable from all DragonStake contract instances. * @dev Iterates through all deployed DragonStake contract instances and sums up the ETH claimable from each. * This function is read-only and can be called externally. * @return claimable The total amount of ETH claimable across all DragonStake contract instances. */ function totalEthClaimable() public view returns (uint256 claimable) { // Iterate over all DragonStake contract instances for (uint256 idx; idx < numDragonStakeContracts; idx++) { // Get a reference to each DragonStake contract DragonStake dragonStake = DragonStake( payable(dragonStakeContracts[idx]) ); // Add the claimable ETH from each DragonStake to the total claimable += dragonStake.totalEthClaimable(); } } // ----------------------------------------- // Internal functions // ----------------------------------------- // ----------------------------------------- // Private functions // ----------------------------------------- /** * @dev Private function to deploy a DragonStake contract instance. * It deploys a new DragonStake contract using create2 for deterministic addresses, * and updates the activeDragonStakeContract and dragonStakeContracts mapping. * An event DragonStakeInstanceCreated is emitted after successful deployment. * This function is called by the deployNewDragonStakeInstance function. */ function _deployDragonStakeInstance() private { // Deploy an instance of dragon staking contract bytes memory bytecode = type(DragonStake).creationCode; uint256 stakeContractId = numDragonStakeContracts; // Create a unique salt for deployment bytes32 salt = keccak256( abi.encodePacked(address(this), stakeContractId) ); // Deploy a new DragonStake contract instance address newDragonStakeContract = Create2.deploy(0, salt, bytecode); // Set new contract as active activeDragonStakeContract = newDragonStakeContract; // Update storage dragonStakeContracts[stakeContractId] = newDragonStakeContract; // Allow the DragonStake instance to send ETH to DragonX _receiveEthAllowlist[newDragonStakeContract] = true; // For functions limited to DragonStake _dragonStakeAllowlist[newDragonStakeContract] = true; // Emit an event to track the creation of a new stake contract emit DragonStakeInstanceCreated( stakeContractId, newDragonStakeContract ); // Increment the counter for DragonStake contracts numDragonStakeContracts += 1; } /** * @dev Private function to start a new stake using the currently active DragonStake instance. * It transfers all TitanX tokens held by this contract to the active DragonStake instance * and then initiates a new stake with the total amount transferred. * This function is meant to be called internally by other contract functions. */ function _startStake() private { // Cache state variables address activeDragonStakeContract_ = activeDragonStakeContract; // Initialize TitanX contract reference ITitanX titanX = ITitanX(TITANX_ADDRESS); DragonStake dragonStake = DragonStake( payable(activeDragonStakeContract_) ); uint256 amountToStake = vault; vault = 0; // Transfer TitanX tokens to the active DragonStake contract titanX.safeTransfer(activeDragonStakeContract_, amountToStake); // Open a new stake with the total amount transferred dragonStake.stake(); // Update states totalTitanStaked += amountToStake; // Emit event emit TitanStakeStarted(activeDragonStakeContract_, amountToStake); } }
// SPDX-License-Identifier: UNLICENSED pragma solidity 0.8.20; /* Common */ uint256 constant BASIS = 10_000; uint256 constant SECONDS_IN_DAY = 86400; uint256 constant SCALING_FACTOR_1e3 = 1e3; uint256 constant SCALING_FACTOR_1e6 = 1e6; uint256 constant SCALING_FACTOR_1e7 = 1e7; uint256 constant SCALING_FACTOR_1e11 = 1e11; uint256 constant SCALING_FACTOR_1e18 = 1e18; /* TitanX staking */ uint256 constant TITANX_MAX_STAKE_PER_WALLET = 1000; uint256 constant TITANX_MIN_STAKE_LENGTH = 28; uint256 constant TITANX_MAX_STAKE_LENGTH = 3500; /* TitanX Stake Longer Pays Better bonus */ uint256 constant TITANX_LPB_MAX_DAYS = 2888; uint256 constant TITANX_LPB_PER_PERCENT = 825; uint256 constant TITANX_BPB_MAX_TITAN = 100 * 1e9 * SCALING_FACTOR_1e18; //100 billion uint256 constant TITANX_BPB_PER_PERCENT = 1_250_000_000_000 * SCALING_FACTOR_1e18; /* Addresses */ address constant TITANX_ADDRESS = 0xF19308F923582A6f7c465e5CE7a9Dc1BEC6665B1; address constant WETH9_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address constant UNI_SWAP_ROUTER = 0xE592427A0AEce92De3Edee1F18E0157C05861564; address constant UNI_FACTORY = 0x1F98431c8aD98523631AE4a59f267346ea31F984; address constant UNI_NONFUNGIBLEPOSITIONMANAGER = 0xC36442b4a4522E871399CD717aBDD847Ab11FE88; /* Uniswap Liquidity Pools (DragonX, TitanX) */ uint24 constant FEE_TIER = 10000; int24 constant MIN_TICK = -887200; int24 constant MAX_TICK = 887200; uint160 constant INITIAL_SQRT_PRICE_TITANX_DRAGONX = 79228162514264337593543950336; // 1:1 /* DragonX Constants */ uint256 constant INCENTIVE_FEE = 300;
// SPDX-License-Identifier: UNLICENSED pragma solidity 0.8.20; // OpenZeppelin import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; // Enum for stake status enum StakeStatus { ACTIVE, ENDED, BURNED } // Struct for user stake information struct UserStakeInfo { uint152 titanAmount; uint128 shares; uint16 numOfDays; uint48 stakeStartTs; uint48 maturityTs; StakeStatus status; } // Struct for user stake struct UserStake { uint256 sId; uint256 globalStakeId; UserStakeInfo stakeInfo; } // Interface for the contract interface IStakeInfo { /** * @notice Get all stake info of a given user address. * @param user The address of the user to query stake information for. * @return An array of UserStake structs containing all stake info for the given address. */ function getUserStakes( address user ) external view returns (UserStake[] memory); /** @notice get stake info with stake id * @return stakeInfo stake info */ function getUserStakeInfo( address user, uint256 id ) external view returns (UserStakeInfo memory); } /** * @title The TitanX interface used by DragonX to manages stakes * @author The DragonX devs */ interface ITitanX is IERC20, IStakeInfo { /** * @notice Start a new stake * @param amount The amount of TitanX tokens to stake * @param numOfDays The length of the stake in days */ function startStake(uint256 amount, uint256 numOfDays) external; /** * @notice Claims available ETH payouts for a user based on their shares in various cycles. * @dev This function calculates the total reward from different cycles and transfers it to the caller. */ function claimUserAvailableETHPayouts() external; /** * @notice Calculates the total ETH claimable by a user for all cycles. * @dev This function sums up the rewards from various cycles based on user shares. * @param user The address of the user for whom to calculate the claimable ETH. * @return reward The total ETH reward claimable by the user. */ function getUserETHClaimableTotal( address user ) external view returns (uint256 reward); /** * @notice Allows anyone to sync dailyUpdate manually. * @dev Function to be called for manually triggering the daily update process. * This function is public and can be called by any external entity. */ function manualDailyUpdate() external; /** * @notice Trigger cycle payouts for days 8, 28, 90, 369, 888, including the burn reward cycle 28. * Payouts can be triggered on or after the maturity day of each cycle (e.g., Cycle8 on day 8). */ function triggerPayouts() external; /** * @notice Create a new mint * @param mintPower The power of the mint, ranging from 1 to 100. * @param numOfDays The duration of the mint, ranging from 1 to 280 days. */ function startMint(uint256 mintPower, uint256 numOfDays) external payable; /** * @notice Returns current mint cost * @return currentMintCost The current cost of minting. */ function getCurrentMintCost() external view returns (uint256); /** @notice end a stake * @param id stake id */ function endStake(uint256 id) external; }
// SPDX-License-Identifier: UNLICENSED pragma solidity 0.8.20; /** * A simple enum to indicate of the initial liquidity for DragonX / TitanX pool has been minted */ enum InitialLiquidityMinted { No, Yes }
{ "optimizer": { "enabled": true, "runs": 9999 }, "metadata": { "bytecodeHash": "none" }, "evmVersion": "paris", "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[{"internalType":"address","name":"target","type":"address"}],"name":"AddressEmptyCode","type":"error"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"AddressInsufficientBalance","type":"error"},{"inputs":[],"name":"FailedInnerCall","type":"error"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"OwnableInvalidOwner","type":"error"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"OwnableUnauthorizedAccount","type":"error"},{"inputs":[{"internalType":"address","name":"token","type":"address"}],"name":"SafeERC20FailedOperation","type":"error"},{"inputs":[],"name":"StakeNotMature","type":"error"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"stateMutability":"payable","type":"fallback"},{"inputs":[],"name":"claim","outputs":[{"internalType":"uint256","name":"claimable","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"sId","type":"uint256"}],"name":"endStakeAfterMaturity","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"openedStakes","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"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":"sendTitanX","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"stake","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"stakeReachedMaturity","outputs":[{"internalType":"bool","name":"","type":"bool"},{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalEthClaimable","outputs":[{"internalType":"uint256","name":"claimable","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}]
Contract Creation Code
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Deployed Bytecode
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Multichain Portfolio | 30 Chains
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.