fix: main page price xtz/usdt

[iiAku]

This is a quick fix for showing the proper price on the main page of Kolibri from the Youves oracle smart contract.
Contract: https://tzkt.io/KT1ExbCyFbsvPQTUitHAK7HSfYkJgiCtBGpM

We are fetching the price directly from the storage contract using that endpoint:
https://api.tzkt.io/v1/bigmaps/597699/keys/XTZUSDT

Perhaps for kolibri long term view and avoiding spamming tzkt api publicly. It might be great if we are deploying a service expose (essentially an API). That expose the same data through with cached responses as long as the price is not updated.

[xtzchad]

we can access same values using mainnet rpc btw:

https://rpc.tzbeta.net/chains/main/blocks/head/context/big_maps/597699
To get the exact xtzusdt key:
https://rpc.tzbeta.net/chains/main/blocks/head/context/big_maps/597699/exprtbVCZ3qh45pH3wZpx1TN2pAJ94pss44kpbHodsxuQ8E7ntVw4M

it may be abit quicker than tzkt api which have few seconds lag updating data when new blocks are pushed
plus, several backup rpcs can be added if one goes offline

[iiAku]

we can access same values using mainnet rpc btw:

https://rpc.tzbeta.net/chains/main/blocks/head/context/big_maps/597699 To get the exact xtzusdt key: https://rpc.tzbeta.net/chains/main/blocks/head/context/big_maps/597699/exprtbVCZ3qh45pH3wZpx1TN2pAJ94pss44kpbHodsxuQ8E7ntVw4M

it may be abit quicker than tzkt api which have few seconds lag updating data when new blocks are pushed plus, several backup rpcs can be added if one goes offline

Thanks for this point, addressed :)

[Fitblip]

Looks sane to me, thank you!