如何将代币经济学添加到 ERC20 代币？

Question

I have taken different courses and even tho they explain how to make a token I haven't been able to learn how to implement tokenomics.

For example fees for transactions, burning to LP etc...

I leave a link to the openzeppelin standard

Would be great to have some more detailed examples on it.

https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC20/ERC20.sol

Answer 1

syncastra. So basically what you are looking for is to make a custom _transfer() method by overriding the one provided in the openzeppelin ERC20 standard. You can check at "OXB" (oxbull.tech) token, which implements this type of fee, but basically, you just take tokens from the sender, before sending them to the receiver, and once you are done charging the fees you can send the left tokens to the receiver. An example would be:

function _transfer(address sender, address recipient, uint256 amount) private {
    require(sender != address(0), "BEP20: transfer from the zero address");
    require(balanceOf(sender) >= amount, "BEP2': not enough balance");
    
    uint256 tokensToBurn = amount.mul(burningFee).div(100);
    amount = amount.sub(tokensToBurn);

    balances[sender] = balances[sender].sub(amount);

    _burn(sender, tokensToBurn);
    balances[recipient] = balances[recipient].add(amount);
    
}

Options of what you can do are infinite. Hope this is helpful.