Integrate ARS/Anclap into the offramp flow

[prayagd]

Context

This ticket enables ARS offramps.

TODO

• Add ARS to the currency dropdown on the withdraw page, icon linked below
• Extend the SEP-24 fee logic to allow for a relative and fixed fee
  • define the proper fee parameters for ARS offramps: 2% relative fee and 10 ARS fixed fee
• When user selects ARS as offramping currency and agrees to the quote
• Add ARS as an output currency and define the output token configuration accordingly
• Implement the Anclap anchor UI when the user selects ARS to offramp
• Introduce a SEP-10 master account secret configuration for the signer service
  • Use the corresponding account as the source account for SEP-10 when Anclap is used as the anchor
  • In that case securely add the SEP-10 signature on the backend

Notes

• TOML file: https://api.anclap.com/.well-known/stellar.toml

Notes

ARS icon - https://static.anclap.com/coin/ars.png

[gianfra-t]

@pendulum-chain/product can this be worked already?

[vadaynujra]

Not till we have the asset live on Spacewalk and Forex AMM (with some col and liq respectively), which is why it is still in draft @gianfra-t

[prayagd]

@pendulum-chain/product can this be worked already?

I will get this ready and estimated till then

[prayagd]

@pendulum-chain/devs please check if the description is enough this to be estimated?

[prayagd]

Hey team! Please add your planning poker estimate with Zenhub @b-yap @bogdanS98 @ebma @gianfra-t @TorstenStueber

[gianfra-t]

I'll assign myself to this since I can test the flow with my bank.

[TorstenStueber]

Just want to point out that ARS is not available yet on the AMM. But this should not be a blocker for this ticket here.

[gianfra-t]

Yes @TorstenStueber thanks. Since the changes are very small, I'll wait for ARS to be "ready" to work on this and test an off-ramp.

[TorstenStueber]

@gianfra-t FYI, this has been unblocked now as ARS is now available on Nabla: https://github.com/pendulum-chain/tasks/issues/401#issuecomment-2412361777

[prayagd]

@gianfra-t if and when you are unblocked for testing. please record the entire flow and share the recording

[TorstenStueber]

I incorporated the description of #173 into this issue and added a description of the SEP-10 master account so that this ticket here corresponds to the.

I will close #173.