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Ismael's user avatar
Ismael's user avatar
Ismael's user avatar
Ismael
Moderator
  • Member for 8 years, 1 month
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  • Argentina
5 votes
Accepted

Trying to swap Eth for Weth (solidity) but always reverting

5 votes

Can you check if an address is a contract or an EOA with eth-brownie or some other python native package?

5 votes

Call swapExactETHForTokens from contract and pay with contract balance

5 votes
Accepted

How can one access values returned via "return(0, returndatasize())"?

5 votes
Accepted

How to define multiple topics?

5 votes
Accepted

meaning of expression: 'type(uint).max'

5 votes

How to use calldata return values in Solidity and when are they useful?

5 votes
Accepted

What is the equivalent of keccak256 in solidity?

5 votes
Accepted

Return Storage Variable From Function In Solidity

4 votes
Accepted

Error when passing the literal string " " to a function with bytes calldata as parameter

4 votes

Fetching InternalType data from another contract

4 votes
Accepted

Does stack persist through external calls?

4 votes
Accepted

Explain the relation between geth --miner.gaslimit and etherscan Gas Limit

4 votes

Whats the point of modifiers?

4 votes

swap token for usdt, create function send 1 usdt and receive 1 token

4 votes

What time Ethereum gas fee is calculated?

4 votes

Why use the Interface (IERC20), instead of the implementation contract (ERC20)?

4 votes
Accepted

Why does OpenZeppelin implement increaseAllowance and decreaseAllowance functions differently in their ERC20 contract?

4 votes
Accepted

Pass a bytes32 as argument in Remix

4 votes

Warning: Unnamed return variable can remain unassigned. Add an explicit return with value to all non-reverting code paths or name the variable

4 votes
Accepted

Cannot verifiy a signature produced by Ledger in Solidity using ecrecover

4 votes
Accepted

How can I change the logic of _safeMint method in a child contract of ER721?

4 votes

Gas limit exceeded on private chain

4 votes
Accepted

Can an account give conditional instruction to EVM

4 votes
Accepted

Transfer Ether from contract to user addresses

4 votes
Accepted

Unit tests written in Solidity, how to change msg.sender address, msg.value,

4 votes
Accepted

How is the block gas limit dynamically adjusted?

4 votes

VM error: invalid opcode resulting from array operations

4 votes
Accepted

Is there an online database that maps functions with their signature?

4 votes

Writing to contract struct via function parameter, memory vs storage, "memory outside of storage"

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