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Ethereum

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First to answer and accepted with score of 10 or more. This badge can be awarded multiple times.
Awarded 812 times.
How does Ethereum fit a mapping into storage?
Awarded 9 hours ago
invalid opcode: opcode 0x5f not defined
Awarded Mar 18 at 6:51
What datatype should I use for an IPFS address hash?
Awarded Jan 30 at 23:47
How to compile external contracts using Hardhat
Awarded Jan 20 at 22:26
How to build an Ethereum hot wallet for an exchange
Awarded Dec 12, 2024 at 12:16
When to use abi.encode, abi.encodePacked or abi.encodeWithSignature in solidity
Awarded Nov 9, 2024 at 18:30
How to construct a raw Ethereum transaction from transaction data
Awarded Oct 27, 2024 at 10:50
Ethereum Address string size
Awarded Aug 19, 2024 at 12:25
Is it possible to read event logs on-chain?
Awarded Aug 16, 2024 at 20:41
Ed25519 in smart contracts
Awarded Jul 27, 2024 at 4:36
assign decimal to a variable in solidity
Awarded Jul 2, 2024 at 4:37
Followed hardhat test tutorial and got "TypeError: (0 , ethers_1.getAddress) is not a function" error
Awarded Jul 1, 2024 at 15:36
Ethers.js - Error: invalid BigNumber string
Awarded Jun 22, 2024 at 10:18
Why does ERC721 have transferFrom and safeTransferFrom?
Awarded May 29, 2024 at 8:41
Does nonce increase when the transaction fail?
Awarded May 25, 2024 at 20:31
how to estimate gas limit when using web3.eth.sendSignedTransaction
Awarded May 6, 2024 at 9:17
Failed to get EIP-1559 fees error when deploying to ZkEVM polygon using Foundry
Awarded Apr 24, 2024 at 15:27
require(condition, "message") vs revert with a custom Error(), which is better and why?
Awarded Feb 29, 2024 at 14:02
What is the difference between getSigners and getNamedAccounts?
Awarded Feb 17, 2024 at 13:46
How to convert bytes to uint in Solidity
Awarded Feb 11, 2024 at 20:02
Forge-std/Test.sol imported and working but VSCode marks an error
Awarded Jan 28, 2024 at 0:25
How do you create a new contract instance with an address *and* arguments?
Awarded Jan 14, 2024 at 3:03
how to get list of transactions history about specific contract address using web3?
Awarded Jan 10, 2024 at 14:42
Bytes variables are connected
Awarded Jan 9, 2024 at 3:55
Can an ERC-20 have more than 18 decimals?
Awarded Nov 21, 2023 at 12:36
Swap ether to tokens on Uniswap V2 Router 02 fails
Awarded Nov 15, 2023 at 16:10
Clarification of "256 bit word" semantics
Awarded Oct 29, 2023 at 8:25
Do all Chainlink feeds return prices with 8 decimals of precision?
Awarded Oct 5, 2023 at 21:36
I accidentally sent a token to a token contract. Can I get it back?
Awarded Oct 3, 2023 at 23:04
Error HH210: Redefinition of task verify failed. Unsupported operation adding positional param definitions in an overridden task
Awarded Sep 29, 2023 at 21:48
Is reading data free unlike a transaction?
Awarded Sep 27, 2023 at 22:05
How do I set a gasPrice with ethers deploy script?
Awarded Sep 11, 2023 at 20:31
I got "sandwich attacked" on my transaction
Awarded Sep 1, 2023 at 14:21
How to pass struct params in remix ide?
Awarded Aug 31, 2023 at 16:42
Solidity modifiers in library?
Awarded Aug 25, 2023 at 2:26
Access to public variable from other contract
Awarded Aug 24, 2023 at 6:53
Sign raw transaction offline with C++ on arduino
Awarded Aug 19, 2023 at 21:35
Module not found: Error: Can't resolve 'stream' in React project including web3
Awarded Aug 10, 2023 at 6:10
Subscribing to new block headers using python (web3py)
Awarded Jul 24, 2023 at 9:35
What is the significance of making constructor payable?
Awarded Jul 19, 2023 at 10:49
In what cases would I set a parameter to use storage instead of memory?
Awarded Jul 18, 2023 at 5:49
Foundry not outputting console.log
Awarded Jul 15, 2023 at 22:47
what does `wad`stand for
Awarded Jul 10, 2023 at 14:16
What does the keyword `var` do in solidity?
Awarded Jun 25, 2023 at 9:40
Solidity msg.sig is not consistent
Awarded Jun 12, 2023 at 17:46
How can I get USDT/USDC for Polygon Mumbai Testnet?
Awarded Jun 7, 2023 at 12:10
Difference between __init and __init_unchained
Awarded Jun 1, 2023 at 20:35
How to compare two bytes32?
Awarded May 31, 2023 at 22:37
Web3.js or Web3.py ? What is the more mature API to interact with Ethereum?
Awarded May 14, 2023 at 10:08
How does the EVM find the entry of a called function?
Awarded Apr 27, 2023 at 7:51
Ethers.js equivalent for web3.eth.getStorageAt?
Awarded Apr 26, 2023 at 9:26
How to check if bytes variable is empty?
Awarded Apr 25, 2023 at 17:02
What's a precompiled contract and how are they different from native opcodes?
Awarded Apr 15, 2023 at 6:10
Storage and memory layout of strings
Awarded Mar 29, 2023 at 18:20
How do you pass ABI-encoded parameters to abi.encodeWithSignature / abi.encodeWithSelector as a single bytes object?
Awarded Mar 23, 2023 at 15:27
How much data can I store in a smart contract, what is the cost and how it is implemented?
Awarded Mar 10, 2023 at 0:05
Binance Smart Chain tokens: What are tTotal, rTotal, tSupply, rSupply, rOwned, tOwned which I see everywhere?
Awarded Feb 28, 2023 at 21:41
What exactly is a proxy contract and why is there a security vulnerability involved in it?
Awarded Feb 27, 2023 at 5:17
How to set msg.value in function call using ethers.js?
Awarded Feb 24, 2023 at 14:40
How to manually approve a token for swap on Uniswap (direct contract interaction)
Awarded Feb 13, 2023 at 2:20
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