This video explains how to borrow and repay tokens on Compound using Solidity.

Collateral 0:56
Liquidity 2:28
Price feed 3:43
Borrow 4:27
Repay 8:08
Ganache 8:56

https://github.com/t4sk/defi-by-example
https://compound.finance/docs

#DeFi #Compound #SmartContract #Solidity #Ethereum #スマートコントラクト

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This video explains how code a Solidity smart contract that will lend ERC20 token to Compound and earn interest.

Code 0:50
Test 6:41
Demo on Ganache 8:59

https://github.com/t4sk/defi-by-example
https://compound.finance/docs

#DeFi #Compound #SmartContract #Solidity #Ethereum #スマートコントラクト

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Flash mint allows you to create tokens and at the end of the transaction they will be destroyed. This video explains how an arbitrage is done using flash mint. Also demo code with WETH10.

Flash mint basics 0:30
Arbitrage with flash loan 1:30
Arbitrage with flash mint 3:01
Code WETH10 5:15
Test 7:54
Demo on Ganache 8:08

https://github.com/t4sk/defi-by-example
https://blog.openzeppelin.com/flash-mintable-asset-backed-tokens/
https://github.com/WETH10/WETH10/blob/main/contracts/WETH10.sol

#DeFi #FlashMint #WETH #SmartContract #Solidity #Ethereum #スマートコントラクト

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This video show how to do a basic flash loan using DyDx. Best part about using DyDx is that fee on loan is only 2 wei no matter how much you borrow!

Code 0:30
Test 5:42
Demo 6:47

https://money-legos.studydefi.com/#/dydx
https://legacy-docs.dydx.exchange/#solo-protocol
https://github.com/t4sk/defi-by-example

#DeFi #DyDx #FlashLoan #SmartContract #Solidity #Ethereum #スマートコントラクト

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This is a guide to how to do a simple flash loan on Uniswap V2. The code is written in Solidity.

Code 0:15
Test 7:13
Demo on Ganache 7:53

https://uniswap.org/docs/v2/smart-contract-integration/using-flash-swaps/
https://github.com/t4sk/defi-by-example

#DeFi #Uniswap #FlashLoan #FlashSwap #SmartContract #Ethereum #スマートコントラクト

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Flash loan is an uncollateralize loan that must be borrowed and repaid in the same transaction. Flash loans are commonly used for arbitrage, liquidation and Defi hacks. This video explains how to write a Solidity smart contract that does flash loan on Aave.

Code: 0:25
Test 5:57
Demo on Ganache 6:58

https://github.com/t4sk/defi-by-example

#DeFi #Aave #FlashLoan #SmartContract #Ethereum #スマートコントラクト

# References
https://docs.aave.com/developers/guides/flash-loans#step-by-step

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This video explains how to code a Vyper smart contract to deposit stable coins into Curve, remove stable coins for liquidity pool tokens and calculate how much stable coins are each LP shares worth.

Add / remove liquidity with Curve user interface 0:21
Code add liquidity 2:52
Get LP shares 5:42
Remove liquidity 6:02
Calculate value of shares 7:01
Test 9:23
Run mainnet fork 10:03

https://github.com/t4sk/defi-by-example

#DeFi #Curve #SmartContract #Ethereum #Vyper #スマートコントラクト

# References
Curve https://curve.fi/

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If the size of code stored at an address is zero then it can't be a smart contract right? This video explains how a smart contract protected from other smart contract using this check (checking code size is 0) can be bypassed.

https://solidity-by-example.org/hacks/contract-size/

#Hack #Solidity #SmartContract #Ethereum

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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.

https://github.com/t4sk/defi-by-example/blob/main/notes/StableSwap.vy

#DeFi #Curve #SmartContract #Ethereum

# References
Curve https://curve.fi/

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This video explains the math of Curve finance described in its white paper.

https://curve.fi/files/stableswap-paper.pdf

#DeFi #Curve #SmartContract #Ethereum

# References
https://alvarofeito.com/articles/curve/#Zero-Slippage-AMM?
Curve https://curve.fi/

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