New answers tagged remix
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Remix IDE shortcuts?
const {MerkleTree} = require("merkletreejs"); // import merkletreejs
const keccak256 = require("keccak256");// import
let whitelistAddresses = [
"...
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Calling Uniswap Multihop Function returns Error
found workaround
just need to call the add approve tokens as a separate function then call the approve function through the swapExactInputMultihop function
// SPDX-License-Identifier: MIT
pragma ...
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Assembly 'create2' and 'new' with salt not determining the same address
"0x4" is interpreted as a string, so the two salts are different.
bytes32("0x4") != 4
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Do dynamic arrays in memory require a pointer to where the length and elements are stored in the memory?
ChatGPT answered my question:
Absolutely, your understanding is correct. Solidity's handling of data, especially strings, within calldata and memory follows an optimization strategy to minimize gas ...
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How can I fetch the current dollar price of BNB in a Solidity smart contract?
Chainlink Data Feeds provide a secure, reliable, and decentralized source of off-chain data to power unique smart contract use cases for DeFi and beyond.
Use Chainlink:
https://data.chain.link/bsc/...
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How do you deal with relative imports in a contract you depend on?
This turned out to be unrelated to the relative imports.
The issue was that the first import in my list (openzeppelin) was using the wrong compiler version.
I changed this:
import "@openzeppelin/...
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Trying to issue ERC 3475 tokens
You need square brackets for the array and for the Transaction struct. See image.
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Why EVM does CALLDATALOAD and MSTORE an array parameter and its elements individually instead of CALLDATACOPY all of it?
Represents pointer. Pointing is absolute not relative to the slot itself. Absolute indexing starts after the first 4 bytes selector.
Not sufficient. Arguments will consume their slots as how they are ...
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importing other contract in remix gone wrong despite write file name or path
Without the folder and file structures, exact names of the contracts, it is hard to find the issue. Anyway you can try these,
Try using absolute file path instead of the relative file path. (Anyway ...
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Error happened while trying to execute a function inside a smart contract: Chainlink Functions Contract Deployment
Because the address is the owner itself or not the pending_address to take ownership of the contract.
There are 2 steps to transfer the ownership of the contract.
Current owner call function ...
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ELI5: Converting an arbitrary gas cost in Remix IDE to USD
It is depended on following factors,
Chain you are using
Gas price at the time
Price of the Native currency of the chain
Let's consider you made the transaction on Ethereum chain just now (2023-11-...
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How to format the code in Remix IDE?
As of 2023 (and possibly earlier), you can format the code by right-clicking and selecting "Format Code".
You can also use the shortcut Shift + Option + F.
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How signature verification works?
This is not signing, it is hashing of a message, the hash is then used.
"Signed" in function name means addition of "\x19Ethereum Signed Message:\n32" here.
I think these methods ...
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require message is not coming?
Using the low-level call function will not revert anything. You can only judge whether the execution is successful based on the result in the return value (result, data).
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Gas estimation errored with the following message (see below). The transaction execution will likely fail. Returned error: invalid opcode
You can only test in Goerli or Sepolia. In remix, importing the openzeppelin library requires your compiled version ^0.8.20; while most bsc or other Ethereum compatible chains are not yet compatible ...
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Gas estimation errored with the following message (see below). The transaction execution will likely fail. Returned error: invalid opcode
There may be other issues, but the first thing that pops out to me is an array out-of-bounds issue.
If you try to access (read or write) to an index in an array that is larger than the arrays length, ...
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