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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!

1 Answer 1

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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.

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  • So lets say I created mintNewToken function with proper checks and modifiers. In child contract, i'd call PARENTCONTRACT.mintNewToken(who, amount)?
    – Medici
    Aug 16, 2021 at 21:40
  • Correct. The child would use an interface and it would know who the parent is because it's msg.sender in the constructor context. So, roughly ParentInterface(myParent).doSomething() Aug 17, 2021 at 0:00
  • Thanks for accepting my answer ;-) Aug 17, 2021 at 6:02

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