Quote requests for WETH/USDC token pair are sent when WETH/ETH token pair is selected

[elena-zh]

1. Open the app
2. Select WETH/ETH token pair
3. Open Console-Ntwork tab
4. Filter by 'quote'
5. Check requests

AR: Quote requests for WETH/USDC token pair are sent in the bg when WETH/ETH token pair is selected

ER: no requests

[W3stside]

Why do you expect no results? The usdc WETH request is the fall back USD price request

[elena-zh]

Seems a bit illogical from my perspective:

1. We do not sell ETH, we wrap it.
2. Request shows WETH as a sell token
3. Request shows USDC as buy token, but it is not in the To field
4. If we request USD price for WETH, why don't we show it on UI?
5. If we connect to a wallet, why don't we send all these requests when ETH/WETH pair is selected?
   
6. Looks like here Don't call fee/price endpoint on Wrapping (ETH/WETH || XDAI/WXDAI etc) gnosis/cowswap#1920 we implemented a logic not to send requests for ETH/WETH pair.

[W3stside]

The usdc in the quote is how the fallback API works:

1. Try coingecko for WETH / USD price
2. Try CoW API for WETH / USDC buy order of amount 100 USDC (100000000 in atoms) and calculate a per unit price

You're seeing the quote for #2 in the networks tab.

Regarding the point of not showing the USD price at all for wrapping I am in agreement mostly, it doesn't really make sense to show it when wrapping

@anxolin @alfetopito @fairlighteth @nenadV91 wdyt

[alfetopito]

Valid point. I agree on not showing/querying USD amounts for (un)wrapping

[elena-zh]

No longer relevant in v.1.21