Prevent users to tunnel less than the minimum amount allowed by the token decimals

[gndelia]

Let's say a token, like USDC, has 6 decimals in the contract definition. That means the smaller amount of USDC possible is 0.000001. Currently, there's no restriction on the minimum amount to tunnel. So users could try to tunnel 0.00000000000001 USDC, which the UI parses as 0.
The contracts do allow trying to tunnel 0, see this tunnel deposit.
However, allowing this kind of transaction is useless, as no tokens are minted on Hemi, and they are only a waste of fees. We should prevent that

We should restrict the amount to tunnel to/from Hemi, preventing it from operating less than the minimum amount. This needs to be validated in the tunnel form as well.

[qgatssdev]

@gndelia How would you like this carried out? If the user tries to pass 0, do we disable the button or prompt a toast. What's the intended solution?
Also what should be the minimum amount that can be tunnel to/from Hemi?

[gndelia]

@qgatssdev The minimum is dictated by the amount of decimals defined in the Token contract.

USDC has defined decimals as 6. Then , the smallest amount possible then is 0.000001. It's impossible to tunnel less than that because smaller values can't be represented. Less than that is zero, which should be prevented. If the amount written in the input by the user is invalid, the submit button should be disabled, similar to how we disable the submit button when the user tries to tunnel more than the balance amount.

TBD by @dvnahuel how we would show to users that the amount is invalid

[qgatssdev]

@qgatssdev The minimum is dictated by the amount of decimals defined in the Token contract.

USDC has defined decimals as 6. Then , the smallest amount possible then is 0.000001. It's impossible to tunnel less than that because smaller values can't be represented. Less than that is zero, which should be prevented. If the amount written in the input by the user is invalid, the submit button should be disabled, similar to how we disable the submit button when the user tries to tunnel more than the balance amount.

TBD by @dvnahuel how we would show to users that the amount is invalid

Okay I get what you mean, please assign this to me. I'll love feedback from @dvnahuel so I know how we want to present the error.

[qgatssdev]

@gndelia Any update on this? I have a branch fixing this but currently don't know how the data is to be presented.

[dvnahuel]

Hey @qgatssdev ! Still working on how to fix this issue, as it’s more about how we showcase the warning across various use cases in the tunnel rather than just one solution. I should have this figured out in the next couple of days.

[qgatssdev]

@dvnahuel Hey! no problem, Just tag me when it's ready.

[dvnahuel]

@dvnahuel Hey! no problem, Just tag me when it's ready.

I’ll tag you as soon as it’s ready. Thanks!