Curve - Code Explaind - get_y() | DeFi

Curve StableSwap has complex code, difficult to understand, one of them being the function get_y. This video explains how the function get_y is implemented.
github.com/t4sk/defi-by-examp...
#DeFi #Curve #SmartContract #Ethereum
References
Curve curve.fi/
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Website: smartcontractprogrammer.com

[@rattle_]

Awesome video! Love the code explanation videos.

[@sarens596]

Wonderful, you hit every points

[@atayurejonathan6582]

great, now I got to learn vyper to use curve

[@benng5271]

Thank you very much for your detailed explain about Curve underlying math. It really helps. It would be nice if you can make another video to cover Curve crypto swap math too. It uses gamma to calculate get_dy seems it's a different story to stable swap.

[@if432]

Thank god I found this!!!!

[@grassfrens]

thanks for the video! any idea on how to get the input amount given the output on curve v2?

[@smartcontractprogrammer]

solve the Curve's equation using Newton's method.

[@grassfrens]

@@smartcontractprogrammer fees are dependent on the post-trade reserves though

[@markolazic6352]

Great video!
Can you explain the origin of Amp = A * n ** (n-1)?

[@sattayakongkom8222]

how to work vy with solidity contract ? etc import or inheritance thx.

[@smartcontractprogrammer]

interface

[@thoyo]

It's there a reason you coded this in vyper over solidity?

[@smartcontractprogrammer]

Curve is written in Vyper

[@thoyo]

@@smartcontractprogrammer gotcha. Thx!

[@cyberdisco9724]

Can't thank you enough for covering this material! Doesn't g(y) = 0? Since you're subtracting all the terms from the left. Wouldn't that make the derivative zero everywhere?

[@smartcontractprogrammer]

here we're using Newton's method to find a specific y* such that g(y*) = 0
the function g(y) is not necessary = 0 for all y

[@cyberdisco9724]

@@smartcontractprogrammer sweet, thanks for clarification

[@0xsupersane920]

EVM can run in Vyper? I thought it was only Solidity.

[@smartcontractprogrammer]

Solidity and Vyper compiles down to bytecode that runs on EVM

[@3rdvoidmen594]

Can you make a video on the ether honeypot works...where the guy autowithraws ether when the victim tries to send in ether to reterive the tokens...the one where eth private key is publicaly put in groups and stuff..

[@smartcontractprogrammer]

any links? tx hash?

[@fevicoI]

It was hard to understand

[@fevicoI]

Am I that dumb?

[@Lopol2010]

I wonder if there is something like 'getAmountIn' but for curve pool. Like get_x which will return you amount of x needed to get amount of y.