Create account form should be using suffix from Linkdrop (i.e. linkdrop contract name)

Problem

Accounts created from Linkdrop have to use Linkdrop contract name as a suffix. However right now there is one hardcoded suffix (specified in env variable) for all cases.

Expected Behavior

Account name selection control uses proper account suffix for a given linkdrop. When you proceed to create account – it gets used as well.

Steps to reproduce

1. Create linkdrop using a contract not matching default process for given network (i.e. using something else than .testnet with testnet wallet).
2. Try to claim it.

[Patrick1904]

Example case:

1. User lands with wallet.near.org/create/linkdrop.contract.account/someKey?suffix=vlad.near
2. User enters my-account in the input
3. Account is created with contract linkdrop.contract.account and the username becomes my-account.vlad.near

[vgrichina]

Looks like it’s not as easy – linkdrop contract can be calling into near or testnet to create account with normal prefix.

So if we want to implement this – needs to pass separate argument for suffix (vs relying on contract name).