yearnfinancecash / yficash.in Goto Github PK

function _msgSender() internal view returns (address payable) {
    return msg.sender;
}

mapping (address => uint) private _balances;

mapping (address => mapping (address => uint)) private _allowances;

uint private _totalSupply;
function totalSupply() public view returns (uint) {
    return _totalSupply;
}
function balanceOf(address account) public view returns (uint) {
    return _balances[account];
}
function transfer(address recipient, uint amount) public returns (bool) {
    _transfer(_msgSender(), recipient, amount);
    return true;
}
function allowance(address owner, address spender) public view returns (uint) {
    return _allowances[owner][spender];
}
function approve(address spender, uint amount) public returns (bool) {
    _approve(_msgSender(), spender, amount);
    return true;
}
function transferFrom(address sender, address recipient, uint amount) public returns (bool) {
    _transfer(sender, recipient, amount);
    _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
    return true;
}
function increaseAllowance(address spender, uint addedValue) public returns (bool) {
    _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
    return true;
}
function decreaseAllowance(address spender, uint subtractedValue) public returns (bool) {
    _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
    return true;
}
function _transfer(address sender, address recipient, uint amount) internal {
    require(sender != address(0), "ERC20: transfer from the zero address");
    require(recipient != address(0), "ERC20: transfer to the zero address");

    _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
    _balances[recipient] = _balances[recipient].add(amount);
    emit Transfer(sender, recipient, amount);
}
function _mint(address account, uint amount) internal {
    require(account != address(0), "ERC20: mint to the zero address");

    _totalSupply = _totalSupply.add(amount);
    _balances[account] = _balances[account].add(amount);
    emit Transfer(address(0), account, amount);
}
function _burn(address account, uint amount) internal {
    require(account != address(0), "ERC20: burn from the zero address");

    _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
    _totalSupply = _totalSupply.sub(amount);
    emit Transfer(account, address(0), amount);
}
function _approve(address owner, address spender, uint amount) internal {
    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);
}

constructor (string memory name, string memory symbol, uint8 decimals) public {
    _name = name;
    _symbol = symbol;
    _decimals = decimals;
}
function name() public view returns (string memory) {
    return _name;
}
function symbol() public view returns (string memory) {
    return _symbol;
}
function decimals() public view returns (uint8) {
    return _decimals;
}

    return c;
}
function sub(uint a, uint b) internal pure returns (uint) {
    return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint a, uint b, string memory errorMessage) internal pure returns (uint) {
    require(b <= a, errorMessage);
    uint c = a - b;

    return c;
}
function mul(uint a, uint b) internal pure returns (uint) {
    if (a == 0) {
        return 0;
    }

    uint c = a * b;
    require(c / a == b, "SafeMath: multiplication overflow");

    return c;
}
function div(uint a, uint b) internal pure returns (uint) {
    return div(a, b, "SafeMath: division by zero");
}
function div(uint a, uint b, string memory errorMessage) internal pure returns (uint) {
    // Solidity only automatically asserts when dividing by 0
    require(b > 0, errorMessage);
    uint c = a / b;

    return c;
}

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

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

function safeApprove(IERC20 token, address spender, uint 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 callOptionalReturn(IERC20 token, bytes memory data) private {
    require(address(token).isContract(), "SafeERC20: call to non-contract");

    // solhint-disable-next-line avoid-low-level-calls
    (bool success, bytes memory returndata) = address(token).call(data);
    require(success, "SafeERC20: low-level call failed");

    if (returndata.length > 0) { // Return data is optional
        // solhint-disable-next-line max-line-length
        require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
    }
}