Questions tagged [flash-loans]

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19 views

Cant receive wETH to my contract after swap on uniswap

I write a simple contract to do a flash loan from aave and interact with uniswap in it. I found out that no wETH is sent to my contract after swaping on uniswap. Transcations are here: https://kovan....
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68 views

ETH2 Atomic Composability and Sharding: What does it really mean for DeFi users?

In the following post, Vitalik Buterin claimed that ETH2-Sharding will not break DeFi composablity: [1] https://ethresear.ch/t/cross-shard-defi-composability/6268 However, I am not at all convinced by ...
3
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1answer
125 views

Explain “griefing” attack on Aave flash loan

Aave doc about flash loan warns to never store funds inside a receiver contract as it can be exposed to "griefing" attack. So my questions are Can you give an example of this attack? How ...
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24 views

What causes re-entrancy attacks? [duplicate]

I’ve seen a lot of projects be hit with re-entrancy attacks caused by flash loans, what is the main process behind these attacks?
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0answers
76 views

Flash minting ether security considerations and attacks

Flash loans enable a class of attacks that have not been possible or observed as much in prior systems. Flash minting ether is a concept that is starting to be implemented. See Example of flash ...
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4answers
659 views

Flash loan security considerations and attacks

What do developers need to be aware of to make their contracts and systems safe against flash loans? What do they have to think about and protect against?
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0answers
127 views

Example of flash minting ether

The WETH10 project offers a flash minting feature. This contract allows to flashMint an arbitrary amount of Wrapped Ether, unbacked by real Ether, with the condition that it is burned before the end ...
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1answer
120 views

Flash loan compile error with function() external payable

I am attempting to compile a flash loan contract. I am having issues with the external payable function. I've tried adding fallback or receive as the error message suggests but I still receive the ...
1
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1answer
75 views

Flashloan callFunction being called internally

I had a chance to look at this contract. contract Flashloan is DyDxFlashLoan { uint256 public loan; constructor() public payable { (bool success, ) = WETH.call.value(msg.value)("&...