Combining ERC20 and ERC721 in a way.

I'm creating a game which has an in-game currency (ERC20). I want players to be able to create (mint) special items (ERC721) with the in-game token

@BitAlt1 Thank you!

I think I found something relative, thanks to your suggestions: https://github.com/REGA-RS/ERC721SmartToken/blob/master/README.md

I think you'd better have two tokens - one for currency and another for items. and some contract that accepts erc20 payments and mints erc721 items

@NotSoSmart so you mean:

1. A contract for the in-game token (ERC20)
2. A contract that implements the ERC721 functions.
3. A contract that implements functions like "mintItem", which is payable, accepts the ERC20 token and calls out to the mint function in the ERC721 contract?

Or maybe:

Combine **all** ERC20, ERC721 and ERC165 interfaces into **1**?

Then in the ERC20 contract I make use of the joint interface and create the in-game token.

Then in the ERC721 contract I make use of the joint interface and implements the functions.

In my `ItemFactory` I make use of the previous contracts, adding a `createItem` function which is payable, creates an item, calls the ERC20 transfer function, and the appropriate ERC721 function, and that's it?

some notes:
- you don't need to mark function as payable to transfer tokens.
- you probably need to call erc20.transferFrom in ItemFactory.createItem
- you can combine 3 contracts into one. it will be more efficient in terms of gas, but much more messy. I recommend you to have separate contracts.

@NotSoSmart Thanks a lot for the pointers. I'm gonna give it another shot. Is it ok if I ping you later?

yep

thx

9-10m is too much.
according to etherscan,
Gas Limit: 7,992,222