I am developping a BEP20 Token, it's almost finished but I need to add a function that sends a percentage of the purchases that someone makes on the token to an external wallet.
I've found a piece of code to solve my problem, but in that case I don't know how to change the 1% to 3% in that case.
contract TransfertTokenAndPercentageToTargetAddress{
// pay 1% of all transactions to target address
address payable target = ENTERANADDRESSHERE;
// state variables for your token to track balances and to test
mapping (address => uint) public balanceOf;
uint public totalSupply;
// create a token and assign all the tokens to the creator to test
constructor(uint _totalSupply) public {
totalSupply = _totalSupply;
balanceOf[msg.sender] = totalSupply;
}
// the token transfer function with the addition of a 1% share that
// goes to the target address specified above
function transfer(address _to, uint amount) public {
// calculate the share of tokens for your target address
uint shareForX = amount/100;
// save the previous balance of the sender for later assertion
// verify that all works as intended
uint senderBalance = balanceOf[msg.sender];
// check the sender actually has enough tokens to transfer with function
// modifier
require(senderBalance >= amount, 'Not enough balance');
// reduce senders balance first to prevent the sender from sending more
// than he owns by submitting multiple transactions
balanceOf[msg.sender] -= amount;
// store the previous balance of the receiver for later assertion
// verify that all works as intended
uint receiverBalance = balanceOf[_to];
// add the amount of tokens to the receiver but deduct the share for the
// target address
balanceOf[_to] += amount-shareForX;
// add the share to the target address
balanceOf[target] += shareForX;
// check that everything works as intended, specifically checking that
// the sum of tokens in all accounts is the same before and after
// the transaction.
assert(balanceOf[msg.sender] + balanceOf[_to] + shareForX ==
senderBalance + receiverBalance);
}
}