I deployed an ERC20/BEP20 token on binance smart chain using truffle and openzepplin. Now I want to verify this smart contract but I have some issues. $ truffle
I am trying to implement a merkle tree just like merkletreejs but python does not have any good libraries that support keccak256 and sorted keccak256 trees. Doe
I want to Integrate Login and Signup with Meta mask in ASP.NET MVC. looking for it for so long. Checked Metamask tutorial but it has code in node.js and the lib
I wonder if anyone has successfully requested ether on https://faucet.rinkeby.io/? I followed the instruction and it kept saying Faucet offline. Any workaround
I've been looking for a way to download all transaction from a specific contract since their start up until now. It's around 25k transactions as of today. I've
I would like to get the data that's displayed on BscScan programmatically, but their API seems quite limited, and I would like to avoid parsing HTML content to
If I mint a collection of n items on my own address (via smart contract) , it'll be publicly visible on my account under the collected / created section like th
I am new to smart contracts and I am working on an Eth Rinkeby dapp and was wondering if anyone can tell me what the "16" means in this section: } network =
I have a security problem in my Solidity contracts and I can't figure out how to fix it. The flow goes like this: First, we create an instance of contract A; Cr
Hi I was following uniswapV2 document to perform a trade transaction and I encounter error as follow invalid bignumber value I got my input amount as 2941991120
I followed the instructions and install all the prerequisites that was listed as required to setup Embark; however, when I reached the dmo test piece, I am not
Is there a way to get the floor price thats displayed on the main page of an NFT collection? Here you see the floor price is 5.75 but if I query the contract u
I am trying to send ETH to a contract function from a web app via metamask and ethers.js. So far I have tried: const provider = new ethers.providers.Web3Provide
I'm trying to fetch the price of ETH from KyberSwap, using Ethers.js, but I'm receiving the following error: Error: unknown account #0 (operation="getAddress",
I have a function in my smart contract where I am trying to return some data that has been stored in the blockchain, function showOrg(address org) external
The Solidity's mapping not returns an array inside a struct (when call mapping_data(), the data variable is undefined). Just be able to read it from read() func
In the official waffle documentation you may find the next way to implement fixtures: import {expect} from 'chai'; import {loadFixture, deployContract} from 'et
I am working on a dapp that needs to verify users' signatures. When testing with Metamask, everything is okay. When trying to verify a signature from Ambire wal
I am getting the Property 'ethereum' does not exist on type 'Window & typeof globalThis' error in React. This is the line generating the issue: import { eth
I am new to truffle and I work on blockchain project so when I "migrate" in truffle develop, this error occurs. Why ? I change the version of my compiler by 4.2