I have a smart contract with a deposit method. Before calling this method the user must approve the allowance for the token first. The approve method on the ERC20 token works fine both in desktop (Brave) and Mobile (iOS Metemask app).
Problem: When trying to use the deposit method from MetaMask Mobile, running on an Oasys Devnet Verse, the “Confirm” button on the MetaMask UI is always disabled (see image)
For those who don’t know, Oasys Devnet verses don’t need transaction fees. So you do not need native currency either.
When running on BSC Testnet I don’t have this problem. My guess is that as I don’t have any Native currency (I don’t need it) MetaMask just decides that you cannot afford to pay for the fees. But I do not need fees so, that could be the bug.
The approval might work because MetaMask detects that it is a ERC20 approval transaction and shows a specialized UI for that method. I guess this specialized UI doesn’t have the same bug. These are just my guesses.
Has anybody deal with this before? There is a work around?
This looks like a bug in MetaMask Mobile to be honest. I was looking for a place to report this kind of bugs, that’s why I ended up here 
