Small proof of concept of what a minimal stateless ERC20 wrapper to an ERC1155 would look like.
The idea here is to use deterministic CREATE2 addresses for the wrapper
contracts. This allows the ERC1155 implementation to handle ERC20 calls
(specifically transfer(From) which is not compatible with ERC1155 because
of the requirement that the receiver must implement the ERC1155TokenReceiver
interface if it has code).
Spending some time to make sure the implementation is sound (e.g. cannot be exploited to drain funds) and how badly the ERC20/1155 specs are being ignored.
Just install dependencies and run tests:
yarn && yarn test