How to fetch or calculate price of an asset?

[RoscoeTheDog]

How to fetch or calculate price of an asset?

[RoscoeTheDog]

I resolved my issue. I think when trying this in the past I had an incorrect type, such as qty not being casted to int or some other issue. Swear I tried it before 😅

If this function returns the amount out for the amount in, with qty being in ether units of 10**18, then you simplify specify qty * 10**18 to return the trade rate between 2 tokens. If you want it relative a tokens price relative to USD, then target a stablecoin out with 1 * 10**18.

# estimate tokens out from amount in
price_usd = self.quickswap.get_price_input(token_in, token_out, 1 * 10**18) # assuming token_out is a stablecoin.
token_out_estimate = self.quickswap.get_price_input(token_in, token_out, int(qty))

[RoscoeTheDog]

As an update: I realized that gas amounts have nothing to do with USD value, so I'm implementing the bot just to use spot amounts and thresholds.

But this question remains valid. How would you simulate a trade with BTC/USDT without on chain execution? I believe I heard something about doing that elsewhere...

[qraxiss]

You cant calculate official pair price with uniswap-python library. Because uniswap v3 have lot of pair pools. And we dont know which pool is better price. U have to check prices on every pool.

[RoscoeTheDog]

You cant calculate official pair price with uniswap-python library. Because uniswap v3 have lot of pair pools. And we dont know which pool is better price. U have to check prices on every pool.

When you say "you have to check prices on every pool", do you mean only for V3? My solution above seemed to work as intended. I'm currently using only V2 because V3 had issues initializing but I might come back to it.

Could I see an example of how to check prices for a swap on V3? I feel like there should be a helper function that takes care of this in the library already. get_price_input?