palomachain / paloma

The fast blockchain messenger protocol

Apache License 2.0

291 stars 135 forks source link

feat: paloma bridge exit tax #1196

Closed maharifu closed 5 months ago

maharifu commented 5 months ago

Related Github tickets

https://github.com/VolumeFi/paloma/issues/1709

Background

We're going to charge a tax fee for every transfer out of paloma. The tax rate is defined by governance vote and we can set exceptions to tokens and addresses.

Add new governance vote to gravity module
The bridge tax information is added to genesis
Before adding transfers to the batched pool in gravity, we set the tax amount, if applicable. This amount is removed from the total amount to transfer. Compass only sees the decreased amount.
On receiving the transfer complete event we burn the total amount of tokens (transferred + taxed)
On cancelling a transfer, we return the total amount including tax

Testing completed

[x] test coverage exists or has been added/updated
[ ] tested in a private testnet

Breaking changes

[x] I have checked my code for breaking changes
[x] If there are breaking changes, there is a supporting migration.

taariq commented 5 months ago

- On receiving the transfer complete event we burn the total amount of tokens (transferred + taxed) @maharifu to be clear, we're not BURNING THE TOTAL AMOUNT OF TOKENS! RIGHT? RIGHT?!?!?