Swap: Get Prices for Third Party SNS tokens

[joel-medicala-yral]

• Currently in Swap backend #447 we are only getting the prices for YRAL SNS tokens by querying the token prices from the token creator's canister
• Add support for lookups for third party SNS tokens and cks by getting their prices from third party sources etc...

Flow

flowchart TD
    D{"Is Token Owner? (Call deployed_cdao for each ID)"} -- Not Owner --> E["Error: Not Owner"]
    E --> F["Abort Process"]
    J{"Token Type"} -- DOLR or BTC --> K["Check KV Cache for Price"]
    K -- Cached Price Found --> L["Return Cached Price"]
    K -- No Cached Price --> M{"Token Type"}
    M -- BTC --> N["Fetch Price from Coinbase & Binance, Calculate Average"]
    M -- DOLR --> O["Fetch Price from Kong Swap"]
    N --> P["Store Fetched Price in KV Cache"]
    O --> P
    P --> Q["Return Fetched Price"]
    J -- "Other Token (e.g. ABC)" --> R["Obtain Token Creator via sns_init Params"]
    R --> S@{ label: "Call Token Creator's Canister to Retrieve Price" }
    S --> T@{ label: "Return Token Price from Token Creator's Canister" }
    D --> J

    S@{ shape: rect}
    T@{ shape: rect}

Loading

[siyara-m-yral]

• Add logic to rust doc diagram

[siyara-m-yral]

• Not able to fetch direct conversions from the decided API, need more research