I Cannot Provide You With The Code Its Seems That You Are Trying To Set A Maximum Sales Limitation For An ERC20 Token On A Metamask Wallet Wither High Understanding the Implications to Do So So.
However, I can give you a general overview or how to approach this problem. Please keep in mind that I will provide information on solidity 0.4.22 and subally versions, because your code extract seems to come from a previous version.
Adjust the limits of the sale in Solidity tokens
To set Limitations for the Sale of Solidity tokens, You can use the following approaches:
1.
You can use the erc20tokensale Library Supplied by OpenZeppelin. This Library Offers a Simple Way to Implement Various Contraints On Token Sales.
Here is an Example of how you could configure and use it in your contract:
`Solidity
Erc20tokensale.sol {library
Setlimit Function (Uint256 _sellamount, Uint256 _Buyamount) Non-Pulsable Public {
Require (_buyamount> 0 && _sellamount> 0);
_limit = _buyamount;
_Maxbuy = _buyamount; // Maximum amount that a account can buy in a single transaction
// Debusing the event when the limit is defined
Emit Limitset (_sellamount, _maxbuy);
}
}
Mytokensal contract is ERC20TOOKSAL {
Uint256 Public _Limit;
Uint256 Public _maxbuy;
Setlimit Function (Uint256 _sellamount, Uint256 _Buyamount) Public {
Super.setlimit (_buyamount, _sellamount);
Require (_buyamount> 0 && _sellamount> 0);
}
// Debusing the event when the limit is defined
Boundary Function (Uint256 _sellamount, Uint256 _maxbuy) Override {
Emit Limitset (_sellamount, _maxbuy);
}
}
”
2. Use or A Simple Logic
Another Way to Implement Contraints on tokens Sales is to use a Simple Logic in your contract. This May Involve the Definition of the Variables _Buyamount and_sellamount 'Before Each Transaction.
Here is an Example:
Solidity
Mytokensal contract is ERC20 {
Uint256 Public _Buyamount;
Uint256 Public _sellamount;
Setlimit Function (Uint256 _sellamount, Uint256 _Buyamount) Non-Pulsable Public {
Require (_buyamount> 0 && _sellamount> 0);
// Defines purchase and sale amounts for all accounts
for (uint256 i = 0; i
if (_buyamount> 0) {
Transfertoking (Address (This), I, _Buyamount);
} Other {
// if the purchase is not allowed, do nothing
}
}
_Buyamount = _sellamount;
}
}
”
Important Considerations
–
Safety : Any Solution you implement must Ensure that it is Secure. Selling tokens should never be limited without tests and appropriate validation.
–
Compliance : make sure to comply with any relevant regulations, in particular in jurisdictions where token sales are subject to specific rules or laws.
–
User experience : the implementation of token sales limitations may have an impact on the user experience. Be careful when you set limits.
This is only a starting point, and you must in depth the concepts and examples before implement them in your project. Always Consider Potential Risks and Make Sure Your Solution Align With The Objectives of Your Project.
