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Latest 25 from a total of 26,509 transactions
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Stake | 21489244 | 5 mins ago | IN | 0 ETH | 0.00074728 | ||||
Unstake | 21489234 | 7 mins ago | IN | 0 ETH | 0.00063401 | ||||
Unstake | 21489213 | 11 mins ago | IN | 0 ETH | 0.00092013 | ||||
Stake | 21489146 | 25 mins ago | IN | 0 ETH | 0.00065839 | ||||
Stake | 21489109 | 32 mins ago | IN | 0 ETH | 0.00066808 | ||||
Unstake | 21489079 | 38 mins ago | IN | 0 ETH | 0.00057168 | ||||
Unstake | 21488806 | 1 hr ago | IN | 0 ETH | 0.00056666 | ||||
Stake | 21488794 | 1 hr ago | IN | 0 ETH | 0.00055315 | ||||
Stake | 21488687 | 1 hr ago | IN | 0 ETH | 0.00057841 | ||||
Stake | 21488683 | 1 hr ago | IN | 0 ETH | 0.00045485 | ||||
Stake | 21488552 | 2 hrs ago | IN | 0 ETH | 0.00094516 | ||||
Stake | 21488395 | 2 hrs ago | IN | 0 ETH | 0.00081386 | ||||
Unstake | 21488299 | 3 hrs ago | IN | 0 ETH | 0.00118143 | ||||
Stake | 21488128 | 3 hrs ago | IN | 0 ETH | 0.00086896 | ||||
Unstake | 21487973 | 4 hrs ago | IN | 0 ETH | 0.00087728 | ||||
Unstake | 21487972 | 4 hrs ago | IN | 0 ETH | 0.00089734 | ||||
Stake | 21487897 | 4 hrs ago | IN | 0 ETH | 0.00071686 | ||||
Stake | 21487842 | 4 hrs ago | IN | 0 ETH | 0.00096576 | ||||
Unstake | 21487752 | 5 hrs ago | IN | 0 ETH | 0.0007432 | ||||
Stake | 21487590 | 5 hrs ago | IN | 0 ETH | 0.00067456 | ||||
Unstake | 21487179 | 7 hrs ago | IN | 0 ETH | 0.00047273 | ||||
Unstake | 21487124 | 7 hrs ago | IN | 0 ETH | 0.00047663 | ||||
Stake | 21487074 | 7 hrs ago | IN | 0 ETH | 0.00049596 | ||||
Stake | 21486999 | 7 hrs ago | IN | 0 ETH | 0.00068117 | ||||
Stake | 21486996 | 7 hrs ago | IN | 0 ETH | 0.00053215 |
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Contract Source Code Verified (Exact Match)
Contract Name:
SimpleStaking
Compiler Version
v0.8.24+commit.e11b9ed9
Optimization Enabled:
Yes with 200 runs
Other Settings:
paris EvmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: UNLICENSED pragma solidity 0.8.24; import {SafeERC20, IERC20} from "openzeppelin-contracts/contracts/token/ERC20/utils/SafeERC20.sol"; import {Ownable2Step, Ownable} from "./../lib/openzeppelin-contracts/contracts/access/Ownable2Step.sol"; import {Pausable} from "./../lib/openzeppelin-contracts/contracts/utils/Pausable.sol"; contract SimpleStaking is Ownable2Step, Pausable { using SafeERC20 for IERC20; // interfaces IERC20 internal immutable MOCA_TOKEN; // startTime uint256 internal immutable _startTime; // pool data uint256 internal _totalStaked; uint256 internal _totalCumulativeWeight; uint256 internal _poolLastUpdateTimestamp; struct Data { uint256 amount; uint256 cumulativeWeight; uint256 lastUpdateTimestamp; } mapping(address user => Data userData) internal _users; address internal _updater; // events event Staked(address indexed user, uint256 amount); event Unstaked(address indexed user, uint256 amount); event StakedBehalf(address[] indexed users, uint256[] indexed amounts); constructor(address mocaToken, uint256 startTime_, address owner, address updater) Ownable(owner){ // ensure startTime is not far-dated require(startTime_ <= block.timestamp + 30 days, "Far-dated start"); require(startTime_ >= block.timestamp, "StartTime in past"); MOCA_TOKEN = IERC20(mocaToken); _startTime = startTime_; _updater = updater; } /*////////////////////////////////////////////////////////////// EXTERNAL //////////////////////////////////////////////////////////////*/ /** * @notice User to stake MocaTokens * @dev User can stake for another address of choice * @param amount Tokens to stake, 1e8 precision */ function stake(uint256 amount) external whenNotPaused { require(amount > 0, "Zero amount"); // cache Data memory userData_ = _users[msg.sender]; // book pool's previous _updatePool(); // book user's previous Data memory userData = _updateUserCumulativeWeight(userData_); // book inflow userData.amount += amount; _totalStaked += amount; // user: update storage _users[msg.sender] = userData; emit Staked(msg.sender, amount); // grab MOCA MOCA_TOKEN.safeTransferFrom(msg.sender, address(this), amount); } /** * @notice User to unstake MocaTokens * @param amount Tokens to unstake, 1e8 precision */ function unstake(uint256 amount) external { require(block.timestamp >= _startTime, "Not started"); require(amount > 0, "Zero amount"); // cache Data memory userData_ = _users[msg.sender]; // sanity checks require(userData_.amount >= amount, "Insufficient balance"); // book pool's previous _updatePool(); // book user's previous Data memory userData = _updateUserCumulativeWeight(userData_); // book outflow userData.amount -= amount; _totalStaked -= amount; // sstore // user: update state _users[msg.sender] = userData; emit Unstaked(msg.sender, amount); // transfer moca MOCA_TOKEN.safeTransfer(msg.sender, amount); } /** * @notice Owner to stake on behalf of users for distribution * @dev Gas used: 84,805 for length =1, incrementing by 2600 for every additional loop * @param users Array of address * @param amounts Array of stake amounts, 1e18 precision */ function stakeBehalf(address[] calldata users, uint256[] calldata amounts) external whenNotPaused { require(msg.sender == _updater, "Incorrect caller"); uint256 usersLength = users.length; uint256 amountLength = amounts.length; require(usersLength == amountLength, "Incorrect lengths"); require(usersLength > 0, "Empty array"); // book pool's previous _updatePool(); uint256 totalAmount; for (uint256 i; i < usersLength; ++i){ address onBehalfOf = users[i]; uint256 amount = amounts[i]; // cache Data memory userData_ = _users[onBehalfOf]; // book user's previous Data memory userData = _updateUserCumulativeWeight(userData_); // book inflow userData.amount += amount; // user: update storage _users[onBehalfOf] = userData; // increment totalAmount totalAmount += amount; } emit StakedBehalf(users, amounts); _totalStaked += totalAmount; //sstore // grab MOCA MOCA_TOKEN.safeTransferFrom(msg.sender, address(this), totalAmount); } /** * @notice Owner to pause contract */ function pause() external onlyOwner { _pause(); } /** * @notice Owner to unpause contract */ function unpause() external onlyOwner { _unpause(); } /** * @notice Owner to change updater address * @param newUpdater new updater address */ function changeUpdater(address newUpdater) external onlyOwner { _updater = newUpdater; } /*////////////////////////////////////////////////////////////// INTERNAL //////////////////////////////////////////////////////////////*/ function _updatePool() internal { // no update of the _poolLastUpdateTimestamp otherwise it can be set to before // _poolLastUpdateTimestamp =0, when t = startTime if (block.timestamp <= _startTime) { return; } if(_totalStaked > 0){ if(block.timestamp > _poolLastUpdateTimestamp){ uint256 timeDelta = _getTimeDelta(block.timestamp, _poolLastUpdateTimestamp); uint256 unbookedWeight = timeDelta * _totalStaked; // sstore _totalCumulativeWeight += unbookedWeight; } } // sstore _poolLastUpdateTimestamp = block.timestamp; } function _updateUserCumulativeWeight(Data memory userData) internal returns(Data memory) { // staking not started: return early uint256 startTime = _startTime; if (block.timestamp <= startTime) { return userData; } // staking has begun if(userData.amount > 0){ if(block.timestamp > userData.lastUpdateTimestamp){ // timeDelta: 0 if staking has not begun uint256 timeDelta = _getTimeDelta(block.timestamp, userData.lastUpdateTimestamp); uint256 unbookedWeight = timeDelta * userData.amount; // update user userData.cumulativeWeight += unbookedWeight; } } userData.lastUpdateTimestamp = block.timestamp; return userData; } function _getTimeDelta(uint256 to, uint256 from) internal view returns (uint256) { // cache uint256 startTime = _startTime; if(from < startTime){ from = startTime; } return (to - from); } /*////////////////////////////////////////////////////////////// GETTERS //////////////////////////////////////////////////////////////*/ ///@notice returns moca token address function getMocaToken() external view returns(address) { return address(MOCA_TOKEN); } ///@notice returns _startTime function getStartTime() external view returns(uint256) { return _startTime; } ///@notice returns _totalStaked function getTotalStaked() external view returns(uint256) { return _totalStaked; } ///@notice returns _totalCumulativeWeight function getTotalCumulativeWeight() external view returns(uint256) { return _totalCumulativeWeight; } ///@notice returns _poolLastUpdateTimestamp function getPoolLastUpdateTimestamp() external view returns(uint256) { return _poolLastUpdateTimestamp; } ///@notice returns user data struct function getUser(address user) external view returns(Data memory) { return _users[user]; } ///@notice returns user's cumulative weight ///@dev returns 0 if staking has not begun function getUserCumulativeWeight(address user) external view returns(uint256) { // cache Data memory userData = _users[user]; // staking not started: return early if (block.timestamp <= _startTime) { return 0; } // calc. unbooked if(userData.amount > 0) { if(block.timestamp > userData.lastUpdateTimestamp){ uint256 timeDelta = _getTimeDelta(block.timestamp, userData.lastUpdateTimestamp); uint256 unbookedWeight = userData.amount * timeDelta; return (userData.cumulativeWeight + unbookedWeight); } } // updated to latest, nothing unbooked return userData.cumulativeWeight; } ///@notice returns pool's total cumulative weight (incl. pending) ///@dev returns 0 if staking has not begun function getPoolCumulativeWeight() external view returns(uint256) { // staking not started if (block.timestamp <= _startTime) { return 0; } // calc. unbooked if(block.timestamp > _poolLastUpdateTimestamp){ uint256 timeDelta = _getTimeDelta(block.timestamp, _poolLastUpdateTimestamp); uint256 unbookedWeight = _totalStaked * timeDelta; return (_totalCumulativeWeight + unbookedWeight); } // updated to latest, nothing unbooked return _totalCumulativeWeight; } ///@notice returns _updater function getUpdater() external view returns(address){ return _updater; } }
// 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) (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) (utils/Pausable.sol) pragma solidity ^0.8.20; import {Context} from "../utils/Context.sol"; /** * @dev Contract module which allows children to implement an emergency stop * mechanism that can be triggered by an authorized account. * * This module is used through inheritance. It will make available the * modifiers `whenNotPaused` and `whenPaused`, which can be applied to * the functions of your contract. Note that they will not be pausable by * simply including this module, only once the modifiers are put in place. */ abstract contract Pausable is Context { bool private _paused; /** * @dev Emitted when the pause is triggered by `account`. */ event Paused(address account); /** * @dev Emitted when the pause is lifted by `account`. */ event Unpaused(address account); /** * @dev The operation failed because the contract is paused. */ error EnforcedPause(); /** * @dev The operation failed because the contract is not paused. */ error ExpectedPause(); /** * @dev Initializes the contract in unpaused state. */ constructor() { _paused = false; } /** * @dev Modifier to make a function callable only when the contract is not paused. * * Requirements: * * - The contract must not be paused. */ modifier whenNotPaused() { _requireNotPaused(); _; } /** * @dev Modifier to make a function callable only when the contract is paused. * * Requirements: * * - The contract must be paused. */ modifier whenPaused() { _requirePaused(); _; } /** * @dev Returns true if the contract is paused, and false otherwise. */ function paused() public view virtual returns (bool) { return _paused; } /** * @dev Throws if the contract is paused. */ function _requireNotPaused() internal view virtual { if (paused()) { revert EnforcedPause(); } } /** * @dev Throws if the contract is not paused. */ function _requirePaused() internal view virtual { if (!paused()) { revert ExpectedPause(); } } /** * @dev Triggers stopped state. * * Requirements: * * - The contract must not be paused. */ function _pause() internal virtual whenNotPaused { _paused = true; emit Paused(_msgSender()); } /** * @dev Returns to normal state. * * Requirements: * * - The contract must be paused. */ function _unpause() internal virtual whenPaused { _paused = false; emit Unpaused(_msgSender()); } }
// 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/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) (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 v5.0.0) (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 v5.0.1) (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; } }
{ "remappings": [ "@openzeppelin/contracts/=lib/openzeppelin-contracts/contracts/", "ds-test/=lib/openzeppelin-contracts/lib/forge-std/lib/ds-test/src/", "erc4626-tests/=lib/openzeppelin-contracts/lib/erc4626-tests/", "forge-std/=lib/forge-std/src/", "openzeppelin-contracts/=lib/openzeppelin-contracts/" ], "optimizer": { "enabled": true, "runs": 200 }, "metadata": { "useLiteralContent": false, "bytecodeHash": "ipfs", "appendCBOR": true }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "evmVersion": "paris", "viaIR": false, "libraries": {} }
Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
[{"inputs":[{"internalType":"address","name":"mocaToken","type":"address"},{"internalType":"uint256","name":"startTime_","type":"uint256"},{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"updater","type":"address"}],"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":"EnforcedPause","type":"error"},{"inputs":[],"name":"ExpectedPause","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"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferStarted","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":"address","name":"account","type":"address"}],"name":"Paused","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Staked","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address[]","name":"users","type":"address[]"},{"indexed":true,"internalType":"uint256[]","name":"amounts","type":"uint256[]"}],"name":"StakedBehalf","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"account","type":"address"}],"name":"Unpaused","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Unstaked","type":"event"},{"inputs":[],"name":"acceptOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newUpdater","type":"address"}],"name":"changeUpdater","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"getMocaToken","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getPoolCumulativeWeight","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getPoolLastUpdateTimestamp","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getStartTime","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getTotalCumulativeWeight","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getTotalStaked","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getUpdater","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"user","type":"address"}],"name":"getUser","outputs":[{"components":[{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"cumulativeWeight","type":"uint256"},{"internalType":"uint256","name":"lastUpdateTimestamp","type":"uint256"}],"internalType":"struct SimpleStaking.Data","name":"","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"user","type":"address"}],"name":"getUserCumulativeWeight","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":"pause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"paused","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pendingOwner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"stake","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address[]","name":"users","type":"address[]"},{"internalType":"uint256[]","name":"amounts","type":"uint256[]"}],"name":"stakeBehalf","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"unpause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"unstake","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)
000000000000000000000000f944e35f95e819e752f3ccb5faf40957d311e8c500000000000000000000000000000000000000000000000000000000668f9f1000000000000000000000000084db3d1de9a43aa144c21b248ad31a1c83d8334d00000000000000000000000084db3d1de9a43aa144c21b248ad31a1c83d8334d
-----Decoded View---------------
Arg [0] : mocaToken (address): 0xF944e35f95E819E752f3cCB5Faf40957d311e8c5
Arg [1] : startTime_ (uint256): 1720688400
Arg [2] : owner (address): 0x84Db3d1de9a43Aa144C21b248AD31a1c83d8334D
Arg [3] : updater (address): 0x84Db3d1de9a43Aa144C21b248AD31a1c83d8334D
-----Encoded View---------------
4 Constructor Arguments found :
Arg [0] : 000000000000000000000000f944e35f95e819e752f3ccb5faf40957d311e8c5
Arg [1] : 00000000000000000000000000000000000000000000000000000000668f9f10
Arg [2] : 00000000000000000000000084db3d1de9a43aa144c21b248ad31a1c83d8334d
Arg [3] : 00000000000000000000000084db3d1de9a43aa144c21b248ad31a1c83d8334d
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OVERVIEW
$MOCA is the underlying resource that powers the Moca Network. Stake $MOCA to earn Staking PowerMultichain Portfolio | 30 Chains
Chain | Token | Portfolio % | Price | Amount | Value |
---|---|---|---|---|---|
ETH | 100.00% | $0.355755 | 216,997,128.4774 | $77,197,889.16 |
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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.