How to Preview the Output Amount on Uniswap at a Smart Contract Level?

Question:

Hey! quick and simple question. With uniswap v3, at a smart contract level, how can I know or preview from before the output amount of a swap given a certain input amount?

Answer:

Here's how to do it:

• Join UniSwap discord.
• In #general channel of UniSwap discord, ask to admin that you want to have access to Channels & Roles channel.
• Go up to Channels & Roles channel.
• Grab the dev role, by selecting developer community.

• Now, with UniSwap V3 you can make a call to the Quoter contract which is designed to give a V3 quote of expected output / input.