Converting synths to sUSD should be done directly through Kwenta

[drptbl]

Description: When you select any synth to convert to sUSD, it's done through 1inch, however it should be done directly through Synthetix contracts or synths should be filtered out from "Convert" feature to force users to use Kwenta instead (lower fees).

https://etherscan.io/tx/0x5f6c3c0b6adaffb4784d23dff801e563af544a5d213dafdfd22dda10ef96d283 https://etherscan.io/tx/0xee5a13e25648aaefbd165e308680be6e53fb37a24bba7ab8b181fedfe83d5352

Prerequisites:

• any synth on your wallet

Reproduction steps:

1. Go to Kwenta "Convert" page (https://dev.kwenta.io/dashboard/convert)
2. Connect your wallet
3. Exchange any synth to sUSD

Current behavior:

• synths are exchanged through 1inch which has higher fees than if it would be done directly through Synthetix contracts

Expected behavior:

• synths should be exchanged directly through Synthetix contract or they should be filtered out of the list to avoid a case when users burn unnecessary fees

Screenshots:

Desktop (please complete the following information):

• OS: macOS Big Sur 11.2.2
• Browser: Chrome 89.0.4389.95

[evgenyboxer]

Yeah, I agree... its a good enhancement.