Put tokens in PanCakeSwap liquidity pool with a limit on number of tokens per address

Support Contracts
1

I created a BEP20 Smart contract using

There are 10 billion tokens and there is a limit of 300 million tokens per address. This is the line of code I added in the _transfer() function to set the limit. (300 million + 18 zeros for 18 decimal places)

        require(_balances[recipient] + amount <= 300000000000000000000000000, "ERC20: transfer 
        amount exceeds address limit"); // to limit number of tokens on address

The problem is, I am trying to put 9.7 billion tokens in the PanCakeSwap liquidity pool but it doesn’t let me. I presume this is because of the limit I have set per address. It lets me add 300 million tokens to the liquidity pool but nothing more than that.

:computer: Environment

solidity v0.8.0

:memo:Details

I am using the Remix IDE. Is there a function I can call to increase/remove the limit for the pancakeswap address? Will the allowance function help me here?

:1234: Code to reproduce

    function _transfer(address sender, address recipient, uint256 amount) internal virtual {
    require(sender != address(0), "ERC20: transfer from the zero address");
    require(recipient != address(0), "ERC20: transfer to the zero address");

    _beforeTokenTransfer(sender, recipient, amount);

    uint256 senderBalance = _balances[sender];
    require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
    require(_balances[recipient] + amount <= 300000000000000000000000000, "ERC20: transfer amount exceeds address limit"); // to limit number of tokens on address
    _balances[sender] = senderBalance - amount;
    _balances[recipient] += amount;

    emit Transfer(sender, recipient, amount);
}

I would really appreciate your help here. Thank you!

2

Hi, welcome! :wave:

Sorry, I am not familiar with the BSC-Chain, maybe you should ask for help in their forum: Home | Binance Chain Forum

I think you can add an extra logic in the _transfer:

if (msg.sender == owner) {
  // transfer directly
} else {
  require(_balances[recipient] + amount <= 300000000000000000000000000, "ERC20: transfer amount exceeds address limit");
}
3

Thank you for the solution. As per my best knowledge, ERC20 and BEP20 tokens are similar. Do you think there is any way that I can just increase the allowance for pancakeswap?

4

Sorry, I am not familiar with the BSC-Chain, maybe you should ask for help in their forum: Home | Binance Chain Forum

I think just like what you will do for the ERC20 contract.

5

Alright, I will do that, thank you!

6

You can also exclude Pancake from the “require” condition

7

Wow, that sounds promising.
I think this is the address for PanCakeSwap - 0x10ED43C718714eb63d5aA57B78B54704E256024E ,
I found it from this transaction and I hope it is right. https://bscscan.com/tx/0x16a76bc669b05f136f279cc5a41a24a1fb3d5daa723bb34846ac6e88fe561901

Should I create a whitelist function as well, or just use logical operators to check the balance and whether or not it is the pancakeswap address?

8

Whitelist can ne useful if you have many addresses to exclude. It should be an array so if you don’t need it, then it is useless