Feat: Implement fee mechanism for IBC transfer in Cronos #235
Description
In order to bridge with cosmos tokens, we need to implement a fee mechanism to cover relayer cost
ICS29 in ibc-go might help with it is still WIP
#234
Another solution is to implement a fee deduction mechanism in cronos
- For Crypto.org Chain -> Cronos
The fee can be deducted after ibc-transfer by adding fee deduction logic in ibc-hooks
- For Cronos -> Crypto.org Chain
The fee can be deducted before ibc-transfer in evm-hooks during a "__CronosSendToIbc" event hook before sending back to IBC coins to the user
Fees are sent to a community account and redistributed to the validators
The fee deducted can be a fixed percentage of the transferable token define in genesis with a max cap [TBD]
Few options for the fee strategy
- option 1: fix value per tokens
- option 2: global percentage of the transferred token
- option 3: percentage of the transferred token with cap