Diff b/w internal _transfer function and public transfer function

[sanjay-in]

In ManualToken.sol in foundry-erc20-f23 repo, why do we have an internal _transfer function and public transfer function. The transfer function calls internal _transfer function. Cant we have a single public function which does the logic
function _transfer(address _from, address _to, uint256 _value) internal {
function transfer( address _to, uint256 _value ) public returns (bool success) {

[EngrPips]

Hello @sanjay-in, ManualToken inherited the internal _transfer from the ERC20 contract, and we want to make sure people can mint Manual token; hence we needed an interface that would be the entrance point for users to mint our ManualToken. So we created a public transfer function that will call the internal _transfer function, which will then mint tokens to users. This pattern can also help with security as users have less access to the actual function that performs the activity.
Please let us know if anything is still confusing.

[sanjay-in]

Hi @EngrPips , Thanks for the clarification it's helpful!

[EngrPips]

You are welcome.