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ERC-20
Overview
Max Total Supply
734,541,968.905746804635184837 vEPOCH
Holders
181
Market
Onchain Market Cap
$0.00
Circulating Supply Market Cap
-
Other Info
Token Contract (WITH 18 Decimals)
Balance
0 vEPOCHValue
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# | Exchange | Pair | Price | 24H Volume | % Volume |
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Contract Name:
VEpoch
Compiler Version
v0.8.17+commit.8df45f5f
Optimization Enabled:
Yes with 800 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: BUSL-1.1 // Developed by Moai Labs LLC, owned by EPOCH DAO pragma solidity 0.8.17; import "@openzeppelin/contracts/token/ERC20/ERC20.sol"; import "@openzeppelin/contracts/access/Ownable.sol"; contract VEpoch is ERC20, Ownable { // @dev Unknown tokens will/must not be used with this contract struct Deposit { address owner; uint32 depositTs; uint32 lockDuration; uint256 depositTokenBalance; } mapping(uint256 => Deposit) public deposits; uint256 public depositCount; uint256 public maxDepositDuration = 730 days; IERC20 public immutable depositToken; // Admin functionalities that can be locked forever bool public maxDepositDurationLocked; bool public authorisedLocked; mapping(address => bool) public authorised; event Deposited(uint256 depositId); event DepositExtend(uint256 _depositId, uint32 _secondsExtended); event WithdrawnForfeit(uint256 depositId, uint256 depositTokensReturned, uint256 veTokensBurned, uint256 rewardForfeit); event Withdrawn(uint256 depositId, uint256 depositTokensReturned, uint256 veTokensBurned); event Authorised(address authorisedAddress, bool newAuthorisationStatus); event MaxDepositDurationSet(uint256 newMaxDepositDuration); event DepositOwnershipTransferred(uint256 depositId, address newOwner); event RewardClaimed(uint256 depositId, uint256 yieldTokenAmount); event RewardForfeit(uint256 depositId, uint256 yieldTokenAmount); // Yield earning related IERC20Metadata public immutable rewardToken; mapping(uint256 => uint256) public rewardStakingPower; uint256 private rewardIndex; mapping(uint256 => uint256) private rewardIndexOf; mapping(uint256 => uint256) private earned; mapping(uint256 => uint256) public rewardTokensClaimed; constructor(address _depositToken, address _yieldToken, address _newOwner) ERC20("Vote Escrow Epoch", "vEPOCH") { depositToken = IERC20(_depositToken); rewardToken = IERC20Metadata(_yieldToken); authorised[address(this)] = true; _transferOwnership(_newOwner); } /// @notice Allows only authorised addresses to transfer tokens from their address /// @dev Can only be called by anyone but will revert if caller is not authorised /// @param to - The address to send veTokens to /// @param amount - The amount of veTokens to send /// @return boolean on success function transfer(address to, uint256 amount) public override returns (bool) { require(authorised[msg.sender], "NON TRANSFERABLE"); _transfer(msg.sender, to, amount); return true; } /// @notice Allows only authorised addresses to transfer tokens from/to any address /// @dev Note: Authorised addresses NEED approvals from users (allowance) /// @param from - The address to send veTokens from /// @param to - The address to send veTokens to /// @param amount - The amount of veTokens to send /// @return boolean on success function transferFrom(address from, address to, uint256 amount) public override returns (bool) { require(authorised[msg.sender], "NON TRANSFERABLE"); address spender = _msgSender(); _spendAllowance(from, spender, amount); _transfer(from, to, amount); return true; } /// @notice Allows anyone to add reward tokens (which will be distributed proportionally) /// @param _tokenAmount - The number of reward tokens to deposit function addRewardTokens(uint256 _tokenAmount) external { rewardIndex += (_tokenAmount * 1e18) / totalSupply(); rewardToken.transferFrom(msg.sender, address(this), _tokenAmount); } /// @notice Computes reward tokens for a given depositId /// @param _depositId - The depositId to calculate rewards for /// @return The number of pending reward tokens function _calculateRewards(uint256 _depositId) private view returns (uint256) { uint256 shares = rewardStakingPower[_depositId]; return (shares * (rewardIndex - rewardIndexOf[_depositId])) / 1e18; } /// @notice Determine the total number of reward tokens earned for a given depositId /// @param _depositId - The depositId you want information for /// @return The number of unclaimed reward tokens function calculateRewardsEarned(uint256 _depositId) external view returns (uint256) { return earned[_depositId] + _calculateRewards(_depositId); } /// @notice Updates rewards earned for a given depositId /// @param _depositId - The depositId you want to update rewards earned for function _updateRewards(uint256 _depositId) private { earned[_depositId] += _calculateRewards(_depositId); rewardIndexOf[_depositId] = rewardIndex; } /// @notice Used internally to update state before reward transfer /// @param _depositId - The depositId you want to update state for /// @return reward - The number of reward tokens available to claim function _claimYield(uint256 _depositId) private returns (uint256 reward) { // Ensure the claimer owns the specified deposit require(deposits[_depositId].owner == msg.sender, "NOT OWNER"); _updateRewards(_depositId); reward = earned[_depositId]; earned[_depositId] = 0; rewardTokensClaimed[_depositId] += reward; emit RewardClaimed(_depositId, reward); } /// @notice Allows user to claim reward tokens earned for a given depositId /// @param _depositId - The depositId you want to claim rewards from function claimYield(uint256 _depositId) public { uint256 reward = _claimYield(_depositId); rewardToken.transfer(msg.sender, reward); } /// @notice Allows user to claim reward tokens earned for one to many depositId's /// @param _depositIds - An array of depositIds you want to claim rewards from function claimYield(uint256[] calldata _depositIds) public { uint256 totalRewards; for(uint256 i = 0; i < _depositIds.length; i++) { totalRewards += _claimYield(_depositIds[i]); } rewardToken.transfer(msg.sender, totalRewards); } /// @notice Returns the veTokens minted for a given tokenAmount and duration /// @dev This function will IGNORE the maximum deposit duration /// @param _tokenAmount - The number of deposit tokens to lock /// @param _duration - The duration in seconds to lock for /// @return The number of veTokens that would be minted function calculateVeTokens(uint256 _tokenAmount, uint256 _duration) public pure returns(uint256) { // @dev 0.000011574074074075 veTokens per 1 deposit token for 1 second // @dev 365 days lock = ~ 365 return (_tokenAmount * (11574074074075 * _duration)) / 1e18; } /// @notice Deposits depositToken for a given duration and mints veTokens /// @dev Deposits can be made on behalf of another address /// @param _tokenAmount - The number of deposit tokens to lock /// @param _duration - The duration in seconds to lock for /// @param _behalfOf - The address that will own this newly created deposit /// @return _depositCount - The new newly created depositId function deposit(uint256 _tokenAmount, uint32 _duration, address _behalfOf) external returns(uint256 _depositCount) { require(_duration > 3599 && _duration <= maxDepositDuration, "INVALID DURATION"); _depositCount = ++depositCount; deposits[_depositCount] = Deposit( _behalfOf, uint32(block.timestamp), _duration, _tokenAmount ); uint256 veTokensMinted = calculateVeTokens(_tokenAmount, _duration); require(veTokensMinted > 0, "INSUFFICIENT VEPOCH MINTED"); _mint(_behalfOf, veTokensMinted); // Ensure this deposit is earning _updateRewards(_depositCount); rewardStakingPower[_depositCount] += veTokensMinted; depositToken.transferFrom(msg.sender, address(this), _tokenAmount); emit Deposited(_depositCount); return _depositCount; } /// @notice Allows withdrawing of deposit tokens which will forfeit some number of reward tokens /// @dev Users can withdraw in full or partially /// @param _depositId - The depositId you want to withdrawForfeit from /// @param _depositTokensToRemove - The number of deposit tokens to remove function withdrawForfeit(uint256 _depositId, uint256 _depositTokensToRemove) external { Deposit storage d = deposits[_depositId]; // Ensure the caller is the owner of said deposit require(d.owner == msg.sender, "NOT OWNER"); // Ensure this function is only used for deposits where lock has not ended require( (d.depositTs + d.lockDuration) > block.timestamp, "DEPOSIT IS MATURED" ); require(d.depositTs != block.timestamp, "DEPOSIT IN SAME BLOCK"); // Compute what percentage of depositTokens user wants to remove uint256 percentage = (_depositTokensToRemove * 1e18) / d.depositTokenBalance; // Decrease deposit balance first, then compute new veToken balance d.depositTokenBalance -= _depositTokensToRemove; uint256 veEndTokenBalance = calculateVeTokens(d.depositTokenBalance, d.lockDuration); // Determine veToken amount to burn uint256 burnAmount = rewardStakingPower[_depositId] - veEndTokenBalance; require(burnAmount > 0, "INSUFFICIENT VEPOCH BURNED"); _burn(msg.sender, burnAmount); // Burn them // Update rewards, then reduce staking power _updateRewards(_depositId); rewardStakingPower[_depositId] -= burnAmount; uint256 forfeitReward = ((earned[_depositId] + rewardTokensClaimed[_depositId]) * percentage) / 1e18; // IF number of EPOCH to return is GREATER than pending unclaimed rewards // Transfer the excess from the user's wallet if(forfeitReward > earned[_depositId]) { // Calculate diff and transfer this many tokens from the user rewardTokensClaimed[_depositId] -= (forfeitReward - earned[_depositId]); // Since the user didn't have enough earned and had to transfer tokens // This means we can set this to 0 earned[_depositId] = 0; rewardToken.transferFrom(msg.sender, address(this), forfeitReward - earned[_depositId]); } else { // The number of yield tokens the user has earned is greater than the number that needs to be forfeit // we can therefore just deduct from their balance. earned[_depositId] -= forfeitReward; } // Redistribute these forfeit rewards rewardIndex += (forfeitReward * 1e18) / totalSupply(); emit WithdrawnForfeit(_depositId, _depositTokensToRemove, burnAmount, forfeitReward); // If this deposit has no associated deposit tokens, delete the deposit (dust protection) if(d.depositTokenBalance == 0) { delete deposits[_depositId]; } // Transfer the LP tokens back depositToken.transfer(msg.sender, _depositTokensToRemove); } /// @notice Burns veTokens for matured deposits and returns deposited tokens /// @dev Users can withdraw in full or partially /// @param _depositId - The depositId you want to withdraw from /// @param _tokenAmount - The number of deposit tokens to remove function withdraw(uint256 _depositId, uint256 _tokenAmount) external { Deposit storage d = deposits[_depositId]; require(d.owner == msg.sender, "NOT OWNER"); require( block.timestamp > (d.depositTs + d.lockDuration), "DEPOSIT NOT MATURED" ); uint256 veTokensBurned = calculateVeTokens(d.depositTokenBalance, d.lockDuration); _updateRewards(_depositId); if(_tokenAmount == d.depositTokenBalance) { _burn(msg.sender, veTokensBurned); // Reduce staking power rewardStakingPower[_depositId] = 0; claimYield(_depositId); delete deposits[_depositId]; depositToken.transfer(msg.sender, _tokenAmount); emit Withdrawn(_depositId, _tokenAmount, veTokensBurned); return; } veTokensBurned = (veTokensBurned * ((_tokenAmount * 1e18) / d.depositTokenBalance)) / 1e18; d.depositTokenBalance -= _tokenAmount; require(veTokensBurned > 0, "INSUFFICIENT VEPOCH BURNED"); _burn(msg.sender, veTokensBurned); // Reduce staking power rewardStakingPower[_depositId] -= veTokensBurned; depositToken.transfer(msg.sender, _tokenAmount); emit Withdrawn(_depositId, _tokenAmount, veTokensBurned); } /// @notice Allows deposit owner to extend deposit up to maximum deposit duration /// @param _depositId - The depositId you want to extend /// @param _secondsToExtend - The number of seconds to extend this deposit by function extendDeposit(uint256 _depositId, uint32 _secondsToExtend) external { Deposit storage d = deposits[_depositId]; require(d.owner == msg.sender, "NOT OWNER"); require(maxDepositDuration >= d.lockDuration + _secondsToExtend, "INVALID DURATION"); // Determine how many more veTokens should be minted uint256 veTokenDiff = calculateVeTokens(d.depositTokenBalance, _secondsToExtend); _mint(msg.sender, veTokenDiff); // Update rewards _updateRewards(_depositId); rewardStakingPower[_depositId] += veTokenDiff; deposits[_depositId].lockDuration += _secondsToExtend; emit DepositExtend(_depositId, _secondsToExtend); } /// @notice Allows user to transfer ownership of their deposit /// @param _depositId - The depositId you want to transfer /// @param _newOwner - The address of the new owner function transferDepositOwnership(uint256 _depositId, address _newOwner) external { Deposit storage d = deposits[_depositId]; require(d.owner == msg.sender, "NOT OWNER"); // Transfer veTokens from old owner to new owner _transfer(msg.sender, _newOwner, calculateVeTokens(d.depositTokenBalance, d.lockDuration)); // Transfer ownership of deposit d.owner = _newOwner; emit DepositOwnershipTransferred(_depositId, _newOwner); } /// @notice Allows Owner to disable veToken transfer authorised functionality forever function setAuthorisedLocked() external onlyOwner { authorisedLocked = true; } /// @notice Allows Owner to disable setMaxDepositDuration functionality forever function setMaxDepositDurationLocked() external onlyOwner { maxDepositDurationLocked = true; } /// @notice This allows the owner to determine which addresses are authorised for token transfers /// @dev Can only be called by the owner of the contract /// @param _address - The address you want to change authorisation status of /// @param _newAuthorisationStatus - The new authorisation status function setAuthorised(address _address, bool _newAuthorisationStatus) external onlyOwner { require(!authorisedLocked); authorised[_address] = _newAuthorisationStatus; emit Authorised(_address, _newAuthorisationStatus); } /// @notice This allows the owner to set the maximum deposit duration /// @dev Can only be called by the owner of the contract /// @param _newMaxDepositDuration - The new maximum deposit duration in seconds function setMaxDepositDuration(uint32 _newMaxDepositDuration) external onlyOwner { require(!maxDepositDurationLocked); require(_newMaxDepositDuration <= 3650 days, "10 YEAR MAX"); maxDepositDuration = _newMaxDepositDuration; emit MaxDepositDurationSet(_newMaxDepositDuration); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol) pragma solidity ^0.8.0; import "../utils/Context.sol"; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor() { _transferOwnership(_msgSender()); } /** * @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 { require(owner() == _msgSender(), "Ownable: caller is not the owner"); } /** * @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 { require(newOwner != address(0), "Ownable: new owner is the zero address"); _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 v4.9.0) (token/ERC20/ERC20.sol) pragma solidity ^0.8.0; import "./IERC20.sol"; import "./extensions/IERC20Metadata.sol"; import "../../utils/Context.sol"; /** * @dev Implementation of the {IERC20} interface. * * This implementation is agnostic to the way tokens are created. This means * that a supply mechanism has to be added in a derived contract using {_mint}. * For a generic mechanism see {ERC20PresetMinterPauser}. * * TIP: For a detailed writeup see our guide * https://forum.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. * * Finally, the non-standard {decreaseAllowance} and {increaseAllowance} * functions have been added to mitigate the well-known issues around setting * allowances. See {IERC20-approve}. */ contract ERC20 is Context, IERC20, IERC20Metadata { mapping(address => uint256) private _balances; mapping(address => mapping(address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; /** * @dev Sets the values for {name} and {symbol}. * * All two of these values are immutable: they can only be set once during * construction. */ constructor(string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; } /** * @dev Returns the name of the token. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5.05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the 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 override returns (uint8) { return 18; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view virtual override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `to` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address to, uint256 amount) public virtual override returns (bool) { address owner = _msgSender(); _transfer(owner, to, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * NOTE: If `amount` 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 amount) public virtual override returns (bool) { address owner = _msgSender(); _approve(owner, spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}. * * 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 `amount`. * - the caller must have allowance for ``from``'s tokens of at least * `amount`. */ function transferFrom(address from, address to, uint256 amount) public virtual override returns (bool) { address spender = _msgSender(); _spendAllowance(from, spender, amount); _transfer(from, to, amount); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { address owner = _msgSender(); _approve(owner, spender, allowance(owner, spender) + addedValue); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { address owner = _msgSender(); uint256 currentAllowance = allowance(owner, spender); require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero"); unchecked { _approve(owner, spender, currentAllowance - subtractedValue); } return true; } /** * @dev Moves `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. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `from` must have a balance of at least `amount`. */ function _transfer(address from, address to, uint256 amount) internal virtual { require(from != address(0), "ERC20: transfer from the zero address"); require(to != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(from, to, amount); uint256 fromBalance = _balances[from]; require(fromBalance >= amount, "ERC20: transfer amount exceeds balance"); unchecked { _balances[from] = fromBalance - amount; // Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by // decrementing then incrementing. _balances[to] += amount; } emit Transfer(from, to, amount); _afterTokenTransfer(from, to, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply += amount; unchecked { // Overflow not possible: balance + amount is at most totalSupply + amount, which is checked above. _balances[account] += amount; } emit Transfer(address(0), account, amount); _afterTokenTransfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); uint256 accountBalance = _balances[account]; require(accountBalance >= amount, "ERC20: burn amount exceeds balance"); unchecked { _balances[account] = accountBalance - amount; // Overflow not possible: amount <= accountBalance <= totalSupply. _totalSupply -= amount; } emit Transfer(account, address(0), amount); _afterTokenTransfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve(address owner, address spender, uint256 amount) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Updates `owner` s allowance for `spender` based on spent `amount`. * * Does not update the allowance amount in case of infinite allowance. * Revert if not enough allowance is available. * * Might emit an {Approval} event. */ function _spendAllowance(address owner, address spender, uint256 amount) internal virtual { uint256 currentAllowance = allowance(owner, spender); if (currentAllowance != type(uint256).max) { require(currentAllowance >= amount, "ERC20: insufficient allowance"); unchecked { _approve(owner, spender, currentAllowance - amount); } } } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual {} /** * @dev Hook that is called after any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * has been transferred to `to`. * - when `from` is zero, `amount` tokens have been minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens have been burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _afterTokenTransfer(address from, address to, uint256 amount) internal virtual {} }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol) pragma solidity ^0.8.0; import "../IERC20.sol"; /** * @dev Interface for the optional metadata functions from the ERC20 standard. * * _Available since v4.1._ */ interface IERC20Metadata is IERC20 { /** * @dev Returns the name of the token. */ function name() external view returns (string memory); /** * @dev Returns the symbol of the token. */ function symbol() external view returns (string memory); /** * @dev Returns the decimals places of the token. */ function decimals() external view returns (uint8); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @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 amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `to`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address to, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `from` to `to` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address from, address to, uint256 amount) external returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Context.sol) pragma solidity ^0.8.0; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } }
{ "metadata": { "bytecodeHash": "none" }, "optimizer": { "enabled": true, "runs": 800 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
[{"inputs":[{"internalType":"address","name":"_depositToken","type":"address"},{"internalType":"address","name":"_yieldToken","type":"address"},{"internalType":"address","name":"_newOwner","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"authorisedAddress","type":"address"},{"indexed":false,"internalType":"bool","name":"newAuthorisationStatus","type":"bool"}],"name":"Authorised","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"_depositId","type":"uint256"},{"indexed":false,"internalType":"uint32","name":"_secondsExtended","type":"uint32"}],"name":"DepositExtend","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"depositId","type":"uint256"},{"indexed":false,"internalType":"address","name":"newOwner","type":"address"}],"name":"DepositOwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"depositId","type":"uint256"}],"name":"Deposited","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"newMaxDepositDuration","type":"uint256"}],"name":"MaxDepositDurationSet","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"depositId","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"yieldTokenAmount","type":"uint256"}],"name":"RewardClaimed","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"depositId","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"yieldTokenAmount","type":"uint256"}],"name":"RewardForfeit","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"depositId","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"depositTokensReturned","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"veTokensBurned","type":"uint256"}],"name":"Withdrawn","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"depositId","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"depositTokensReturned","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"veTokensBurned","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"rewardForfeit","type":"uint256"}],"name":"WithdrawnForfeit","type":"event"},{"inputs":[{"internalType":"uint256","name":"_tokenAmount","type":"uint256"}],"name":"addRewardTokens","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"authorised","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"authorisedLocked","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_depositId","type":"uint256"}],"name":"calculateRewardsEarned","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_tokenAmount","type":"uint256"},{"internalType":"uint256","name":"_duration","type":"uint256"}],"name":"calculateVeTokens","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"uint256[]","name":"_depositIds","type":"uint256[]"}],"name":"claimYield","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_depositId","type":"uint256"}],"name":"claimYield","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"subtractedValue","type":"uint256"}],"name":"decreaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_tokenAmount","type":"uint256"},{"internalType":"uint32","name":"_duration","type":"uint32"},{"internalType":"address","name":"_behalfOf","type":"address"}],"name":"deposit","outputs":[{"internalType":"uint256","name":"_depositCount","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"depositCount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"depositToken","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"deposits","outputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"uint32","name":"depositTs","type":"uint32"},{"internalType":"uint32","name":"lockDuration","type":"uint32"},{"internalType":"uint256","name":"depositTokenBalance","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_depositId","type":"uint256"},{"internalType":"uint32","name":"_secondsToExtend","type":"uint32"}],"name":"extendDeposit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"addedValue","type":"uint256"}],"name":"increaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"maxDepositDuration","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"maxDepositDurationLocked","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"rewardStakingPower","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"rewardToken","outputs":[{"internalType":"contract IERC20Metadata","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"rewardTokensClaimed","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_address","type":"address"},{"internalType":"bool","name":"_newAuthorisationStatus","type":"bool"}],"name":"setAuthorised","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"setAuthorisedLocked","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint32","name":"_newMaxDepositDuration","type":"uint32"}],"name":"setMaxDepositDuration","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"setMaxDepositDurationLocked","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_depositId","type":"uint256"},{"internalType":"address","name":"_newOwner","type":"address"}],"name":"transferDepositOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_depositId","type":"uint256"},{"internalType":"uint256","name":"_tokenAmount","type":"uint256"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_depositId","type":"uint256"},{"internalType":"uint256","name":"_depositTokensToRemove","type":"uint256"}],"name":"withdrawForfeit","outputs":[],"stateMutability":"nonpayable","type":"function"}]
Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
00000000000000000000000082b8c7c6fb62d09cfd004309c1f353fb1a926edc00000000000000000000000097d0cfeb4fde54b430307c9482d6f79c761fe9b60000000000000000000000006d78a40775e06d1037e855e52ccb2fb5762ad3db
-----Decoded View---------------
Arg [0] : _depositToken (address): 0x82b8c7c6Fb62D09CfD004309c1F353FB1A926Edc
Arg [1] : _yieldToken (address): 0x97D0CfEB4FdE54B430307c9482d6f79C761Fe9B6
Arg [2] : _newOwner (address): 0x6D78A40775e06D1037E855e52Ccb2Fb5762aD3Db
-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 00000000000000000000000082b8c7c6fb62d09cfd004309c1f353fb1a926edc
Arg [1] : 00000000000000000000000097d0cfeb4fde54b430307c9482d6f79c761fe9b6
Arg [2] : 0000000000000000000000006d78a40775e06d1037e855e52ccb2fb5762ad3db
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