Minting parent tokens from child contract

Question

Is it possible to mint ERC20 tokens that are created in a parent contract, from a child contract? If so how is it implemented?

Thank you in advance!

Answer 1

It's about access control and an appropriate function to call.

In the parent contract, you will need a mint or issueTokens() function (to avoid name conflict/confusion).

function issueTokens(who, quantity) external onlyChildren ... { ... }

Notice the onlyChildren modifier. That would control access so only trusted contracts are allowed to call the function.

Something like ...

modifier onlyChildren {
  require( isChild[msg.sender], "don't know you" );
  _;
}

Relies on a mapping that knows which contracts to trust.

mapping(address => bool) public isChild;

That relies on keeping track of deployed contracts:

Child child = new Child();
isChild[address(child)] = true;

Hope it helps.