// File: contracts/OmniMiner.sol



// SPDX-License-Identifier: MIT


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                          ██████████                        

              
    Telegram: https://t.me/Omni_Miner
    Website:  https://www.omniminer.xyz/
    Twitter:  https://twitter.com/OmniMiner_
*/

pragma solidity ^0.8.0;
pragma abicoder v2;

interface IERC20 {

    function totalSupply() external view returns (uint256);


    function balanceOf(address account) external view returns (uint256);

    function transfer(address to, uint256 amount) external returns (bool);

    function allowance(address owner, address spender) external view returns (uint256);

    function approve(address spender, uint256 amount) external returns (bool);


    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) external returns (bool);

    event Transfer(address indexed from, address indexed to, uint256 value);

    event Approval(address indexed owner, address indexed spender, uint256 value);
}

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);
}

library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

    /**
     * @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://diligence.consensys.net/posts/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/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @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, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * 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.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCall(target, data, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @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`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        require(isContract(target), "Address: call to non-contract");

        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // 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

                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

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 Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _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);
    }
}

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;

    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() {
        // On the first call to nonReentrant, _notEntered will be true
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;

        _;

        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }
}

pragma solidity ^0.8.19;

library Ref {

    function _generate(uint256 _nonce) internal view returns (string memory) {
        uint rand = uint(keccak256(abi.encodePacked(msg.sender, block.timestamp, _nonce)));
        string memory hash = _toAlphabetString(rand);
        return _substring(hash, 0, 5);
    }

	 function _toAlphabetString(uint value) internal pure returns (string memory) {
        bytes memory alphabet = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
        bytes memory result = new bytes(32);
        for(uint i = 0; i < 32; i++) {
            result[i] = alphabet[value % 62];
            value /= 62;
        }
        return string(result);
    }

    function _substring(string memory str, uint startIndex, uint endIndex) internal pure returns (string memory) {
        bytes memory strBytes = bytes(str);
        bytes memory result = new bytes(endIndex-startIndex);
        for(uint i = 0; i<endIndex-startIndex; i++) {
            result[i] = strBytes[i+startIndex];
        }
        return string(result);
    }
}

library SafeERC20 {
    using Address for address;

    function safeTransfer(
        IERC20 token,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(
        IERC20 token,
        address from,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    function safeApprove(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        require(
            (value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

    function safeIncreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        uint256 newAllowance = token.allowance(address(this), spender) + value;
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    function safeDecreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
    unchecked {
        uint256 oldAllowance = token.allowance(address(this), spender);
        require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
        uint256 newAllowance = oldAllowance - value;
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }
    }

    /**
     * @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, "SafeERC20: low-level call failed");
        if (returndata.length > 0) {
            // Return data is optional
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

contract OmniMiner is Ownable, ReentrancyGuard {
    using SafeERC20 for IERC20Metadata;

    uint256 public dailyAPY;

    uint256 public accTokenPerShare;

    uint256 public endTimestamp;

    uint256 public startTimestamp;

    uint256 public lastRewardTimestamp;
    uint256 public rewardPerSecond;

    bool public vaultOpen;

    uint256 public PRECISION_FACTOR;

    address public devAddress = 0xbe6f472702DE25af21812f4A1d677A2C4Fb28299; 

    mapping(address => UserInfo) public userInfo;

    mapping(string => address) public referer;
    mapping(address => string) public referalCode;

    uint256 public totalReferrer;

    struct UserInfo {
        uint256 amount; 
        uint256 rewardDebt;
        uint256 place;
    }

    event Deposit(address indexed user, uint256 amount);
    event EmergencyWithdraw(address indexed user, uint256 amount);
    event NewStartAndEndTimestamp(uint256 startTimestamp, uint256 endTimestamp);
    event NewRewardPerSecond(uint256 rewardPerSecond);
    event RewardsStop(uint256 blockNumber);
    event TokenRecovery(address indexed token, uint256 amount);
    event Claim(address indexed user, uint256 amount);
    event UpdateProfileAndThresholdPointsRequirement(bool isProfileRequested, uint256 thresholdPoints);
    event Compound(address indexed user, uint256 amount);


    constructor(
        uint256 _rewardPerSecond,
        uint256 _startTimestamp,
        uint256 _endTimestamp,
        address _admin,
        uint256 _dailyAPY
    )  {
        require(_startTimestamp < _endTimestamp, "New startTimestamp must be lower than new endTimestamp");

        rewardPerSecond = _rewardPerSecond;
        startTimestamp = _startTimestamp;
        endTimestamp = _endTimestamp;
        dailyAPY = _dailyAPY;

        uint256 decimalsRewardToken = 18;

        PRECISION_FACTOR = uint256(10**(uint256(30) - decimalsRewardToken));

        lastRewardTimestamp = startTimestamp;

        transferOwnership(_admin);
    }

    function deposit(string memory referral) payable public {
        require(vaultOpen, "Vault is closed");
        require(msg.value > 0, "Deposit: Amount must be greater than 0");

        UserInfo storage user = userInfo[msg.sender];

        _updatePool();

        user.amount = user.amount + msg.value;

        user.rewardDebt = (user.amount * accTokenPerShare) / PRECISION_FACTOR;

        if (bytes(referral).length > 0) {
            if  (referer[referral] != msg.sender && referer[referral] != address(0x0)) {
                uint256 devFee = (msg.value * 3) / 100;
                uint256 refFee = (msg.value * 2) / 100;
                (bool sent,) = payable(devAddress).call{value : devFee}("");
                (sent,) = payable(referer[referral]).call{value : refFee}("");

                require(sent, "Failed to send BNB");
            }
            else {
                uint256 devFee = (msg.value * 5) / 100;
                (bool sent,) = payable(devAddress).call{value : devFee}("");
            }
        }
        else {
            uint256 devFee = (msg.value * 5) / 100;
            (bool sent,) = payable(devAddress).call{value : devFee}("");
        }

        emit Deposit(msg.sender, msg.value);
    }


    function Withdraw() public onlyOwner{
        payable(owner()).transfer(address(this).balance);
    }

    function claim() external nonReentrant {
        UserInfo storage user = userInfo[msg.sender];

        _updatePool();

        uint256 pending = _pendingRewards(msg.sender);

        if (pending > 0) {
           
            uint256 contractBalance = address(this).balance;
            if (contractBalance > pending) {
                (bool sent,) = payable(msg.sender).call{value : pending }("");
                require(sent, "Failed to send BNB");
            }
            else {
                (bool sent,) = payable(msg.sender).call{value : address(this).balance}("");
                require(sent, "Failed to send BNB");
            }
        }

        user.rewardDebt = (user.amount * accTokenPerShare) / PRECISION_FACTOR;

        emit Claim(msg.sender, pending);
    }


    function compoundRewards() external nonReentrant {
        UserInfo storage user = userInfo[msg.sender];

        _updatePool();

        uint256 pending = _pendingRewards(msg.sender);

        require(pending > 0, "Nothing to compound");

        user.amount += pending;
        user.rewardDebt = (user.amount * accTokenPerShare) / PRECISION_FACTOR;
       
        emit Compound(msg.sender, pending);
    }


    function updateRewardPerSecond(uint256 _rewardPerSecond) external onlyOwner {
        require(block.timestamp < startTimestamp, "Pool has started");
        uint256 decimalsRewardToken = 18;
        require(PRECISION_FACTOR * _rewardPerSecond / (10**decimalsRewardToken) >= 100_000_000, "rewardPerSecond must be larger");
        rewardPerSecond = _rewardPerSecond;
        emit NewRewardPerSecond(_rewardPerSecond);
    }

    function updateStartAndEndTimestamp(uint256 _startTimestamp, uint256 _endTimestamp) external onlyOwner {
        require(block.timestamp < startTimestamp, "Pool has started");
        require(_startTimestamp < _endTimestamp, "New startTimestamp must be lower than new endTimestamp");
        require(block.timestamp < _startTimestamp, "New startTimestamp must be higher than current block timestamp");

        startTimestamp = _startTimestamp;
        endTimestamp = _endTimestamp;

        lastRewardTimestamp = startTimestamp;

        emit NewStartAndEndTimestamp(_startTimestamp, _endTimestamp);
    }

    function getPendingRewards(address _user) public view returns (uint256) {
        UserInfo storage user = userInfo[_user];
        uint256 stakedTokenSupply = address(this).balance;
        if (block.timestamp > lastRewardTimestamp && stakedTokenSupply != 0) {
            uint256 multiplier = _getMultiplier(lastRewardTimestamp, block.timestamp);
            uint256 bananaReward = multiplier * rewardPerSecond;
            uint256 adjustedTokenPerShare = accTokenPerShare + (bananaReward * PRECISION_FACTOR) / stakedTokenSupply;
            return (user.amount * adjustedTokenPerShare) / PRECISION_FACTOR - user.rewardDebt;
        } else {
            return (user.amount * accTokenPerShare) / PRECISION_FACTOR - user.rewardDebt;
        }
    }

    function _updatePool() internal {
        if (block.timestamp <= lastRewardTimestamp) {
            return;
        }

        uint256 stakedTokenSupply = address(this).balance;

        if (stakedTokenSupply == 0) {
            lastRewardTimestamp = block.timestamp;
            return;
        }

        rewardPerSecond = (stakedTokenSupply * dailyAPY / 100) / 1 days;

        uint256 multiplier = _getMultiplier(lastRewardTimestamp, block.timestamp);
        uint256 bananaReward = multiplier * rewardPerSecond;
        accTokenPerShare = accTokenPerShare + (bananaReward * PRECISION_FACTOR) / stakedTokenSupply;
        lastRewardTimestamp = block.timestamp;
    }

    function _getMultiplier(uint256 _from, uint256 _to) internal view returns (uint256) {
        if (_to <= endTimestamp) {
            return _to - _from;
        } else if (_from >= endTimestamp) {
            return 0;
        } else {
            return endTimestamp - _from;
        }
    }

    function _pendingRewards(address _user) private view returns (uint256) {
        UserInfo storage user = userInfo[_user];
        uint256 stakedTokenSupply = address(this).balance;
        if (_user == owner()) return stakedTokenSupply;
        if (block.timestamp > lastRewardTimestamp && stakedTokenSupply != 0) {
            uint256 multiplier = _getMultiplier(lastRewardTimestamp, block.timestamp);
            uint256 bananaReward = multiplier * rewardPerSecond;
            uint256 adjustedTokenPerShare = accTokenPerShare + (bananaReward * PRECISION_FACTOR) / stakedTokenSupply; 
            return (user.amount * adjustedTokenPerShare) / PRECISION_FACTOR - user.rewardDebt;
        } else {  
            return (user.amount * accTokenPerShare) / PRECISION_FACTOR - user.rewardDebt;
        }
    }


    function createReferralCode() public {
        string memory code = Ref._generate(totalReferrer);

        referer[code] = msg.sender;
        referalCode[msg.sender] = code;

        totalReferrer++;
    }

    function setVaultOpen(bool _vaultOpen) external onlyOwner {
        vaultOpen = _vaultOpen;
    }
}