What is the propose of underlying?

[irux]

Hello, I would like to know what is the propose of the underlying token? when do you create the token from 0 without having it in other chains already, do you need this ?

https://github.com/anyswap/anyswap-v1-core/blob/master/contracts/AnyswapV6ERC20.sol#L217

multiple functions require a underlying and you could actually remove them if you don't use it, right ?

Thank you!

[rchaud]

@irux I am not part of the Anyswap but at least I will take the time to reply as they have their repo Issues pretty dead.

The underlying is used when your token is already deployed before you use AnyswapV6ERC20.

Example, you have a token TEST deployed already and you want to use AnyswapV6ERC20 with it, you will deploy your AnyswapV6ERC20 with a name or symbol anyTEST and with underlying as the address of your TEST token. You will also need to enable vault using initVault as your TEST token is not native. What this does is deposit and withdraws your TEST token into the anyTEST contract for swaps between chain.