// SPDX-License-Identifier: MIT pragma solidity ^0.8.14; abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } } interface IBEP20 { function totalSupply() external view returns (uint256); function balanceOf(address ac...
I said in the last installment that a hash function could hash anything, and that was one of its great advantages. This is only half-truth, perhaps, as much as you can say that everything in a computer is a binary string. It is more accurate to say that you can hash anything that ...
49. What is the difference between string and bytes? String is equal to bytes, but it does not allow length or index access, for now. As a rule of thumb, use bytes for arbitrary-length raw byte data and string for arbitrary-length string (UTF-8) data. Bytes, in contrast to string,...
I have not managed to convert a line of code I have in one a Smart Contract of the back end of my DAPP into the Dart syntax for the front end part of it. SOLIDITY :address account = address(uint160(uint256(keccak256(abi.encodePacked(entityName)))with entityName as Str...
If there are too many parameter or local variable in the function , solidity will throw "stack too deep". To resolve the issue, convert the big struct into small struct or use the local variable as part of struct. Below is an example of How I did it. I need these much parameter to...
Short for gigawei, gwei is often used in gas fee quotes, althoughEthereum walletsusually convert fees to USD or other currencies for convenience. Wei:Each gwei equals 1 billion wei. Wei refers to the smallest denomination of ether. Gas fees on Ethereum vary based on bandwidth, space, and ...
Initially, I took the HTML CSS code and used this site to convert to SVG but the output svg size is very heavy. Another problem I faced while storing this data for design was that the max size of a smart contract cannot be more than 24576 bytes. So, I moved the code to ano...
Advanced MultiSwap: How to better arbitrage with Solidity Making multiple swaps across different decentralized exchanges in a single transaction If you want maximum arbitrage performance, you need to swap tokens between exchanges in a single transaction. Or maybe you just want to save gas on certain...
We will be building this with Node.js, but you can also build with Python or any other programming language. We’ll also see how to store media data inIPFS, get the address and write functions to store this address in — and retrieve this address from a blockchain with the Solidity pro...
But when the swap is any asset to WETH the amountIn is represented as the "any asset" amount and I don't know how to convert or any other way to get the WETH amount that I received. Here is Transaction for example and the output that I see in the code at the "decodedInp...