Uniswap V2 Price Oracle | DeFi

[@smartcontractprogrammer]

0:00 - code 3:29 - constructor 5:34 - update 10:25 - consult 12:14 - testnet demo

[@bradsandilands6087]

You're very good at explaining stuff. Your explanation of over/underflow in this situation is great

[@jsckr5986]

I am studying Uniswap. lucky to meet you.

[@ethancemer8679]

Awesome video as always. I have been a subscriber for about a year now and its crazy how your channel was at less than 2k subs then and now you have over 20k!

[@muditsarda1600]

This is one dense video! Keep making videos like this, you are helping a lot.

[@computerevolve8416]

congratulations bro for 20k subs

[@supasinliulak815]

great video!! could you please elaborate more on the overflows part ? I'm not quite understand why it is desired

[@veliea5160]

this is my understanding. Imagine our range is 0-64 and `blockTimeStamp=50`, `blockTimestampLast=40` so the diff is10. imagine after 20 seconds, `blockTimestampLast` did not change and still 40. but `blockTimestamp` is not 50+20=70. since range is 0-64 it is 6 now. `blockTimestampLast` is still 40 so 6-40=-34 in mod 64 it is 30. initially diff was 10, we assumed `blockTimestampLast` did not change so after 20 seconds our diff should be 30 and it is 30.

[@bhok5228]

Very good video, thank you

[@andreujuanc]

Brilliant!

[@user-ly9bu4tf6h]

nice thank you bud

[@vEr5eX]

Is there a reason for calling the update function twice? Wouldn’t calling it once the first time be enough to update the cumulative prices in the contract?

[@mateandroid]

Great content! Learned so much about UniswapV2 through this channel! Are there any plans maybe to cover UniswapV3?

[@smartcontractprogrammer]

I am learning Uni V3 spot price. Uni V3 TWAP soon

[@shekhusatav]

Can we fix the value of token against pegged token ? how ?

[@criptonerds3757]

Great video dear, do you know how I can get the price of my token in the past? In this case, I cloned uniswapv2, and I now have my own exchange, and I need to take the price data to a chart, so looking at the blocks, or events, is it possible to obtain the old price of the token?

[@smartcontractprogrammer]

use external API like Coin gecko or Dune analytics

[@criptonerds3757]

@@smartcontractprogrammer coingecko I think it only shows the tokens listed on it, and exchanges listed on it. probably use external api

[@JG-hq6dv]

hey man great vid.could u perhaps make more similar defi related content using hadhat

[@adamlevoy6573]

Great vid. What would be some practical applications for this contract?

[@smartcontractprogrammer]

Need for on-chain price, but spot price can easily be manipulated. Time weighted average price is more costly to manipulate.

[@adegbiteademola5329]

@@smartcontractprogrammer Thank you for this video. That mean i can use this contract as a price feed oracle to create a swapper market place. Right?

[@s.matthewenglish8099]

it's honestly confusing that they named in 'amountOut' because it's _not_ the amountOut, it has nothing to do with the "amountOut" it's the average price over that perriod

[@0xh8h]

Hi, what resolution: 1/ 2**112 means?

[@smartcontractprogrammer]

smallest step between 2 numbers is 1 / 2^112