Quick Uniswap version detection

[AlexFigalex]

Hi. I'm learning web3.py and came across your library, it's really cool work, thank you! I have a question a bit off-topic, but please answer if you can: if at the moment I buy a token, I only know its address. How can I quickly determine the version of its liquidity pool (uniswap v2 or uniswap v3) to generate a correct transaction? Thanks.

[Elnaril]

Hi!
You have several options; off the top of my head:

• Give the uniswap smart path a try: as a bonus you'll get the path to get the best price! ;)
• Call the V2 and V3 factories to check the existence of a pool with your token and weth or some stablecoins
• Request a quote from V2 and V3 for your token against weth or some stablecoins

Hope this helps! :)
Closing this discussion as off topic indeed.

[Petair13]

Hi