Currently, I’m developing the Solana Dex Telegram mini application. I'm stuck with connecting a wallet. The fact is that Telegram blocks third-party libraries for connecting a wallet such as “Connect wallet”, “solana/web.js”, etc. Competitors, for example AlphaDex, implement the connection…
I'm using javascript to setup and run Hyperledger Fabric on my ubuntu system (24.04) and I'm getting this following error mentioned exactly below. Can anyone please suggest any solution? Error: endorsement failure during invoke. response: status:500 message:"error in simulation: failed…
So I have written normal code that fetches the price of the token from coinGecko APIs and other crypto tokens such as BTC, ETH, and XRP from the factory contract of the pancake-swap but it is the trading platform which…
I know this is a pretty common question but all the answers on the web are not working for me. I have a php and js app working in Laravel with React and Vite, and I dev on Windows (cmd).…
This is a blockchain test. It seems that it was OK the last time I ran it. When I came to run the project today, the following error occurred. I want to know why. import vorpal from "vorpal"; import BlockChain…
I have a solidity code in my vscode. Is it possible if i can convert or create a flow chart out of it. Is there any inbuilt extension for that?
I have generated mnemonic using bip39.generateMnemonic();. I need to convert this mnemonic to AsymmetricKeyPair with secp256k1. AsymmetricKeyPair<PublicKey, PrivateKey> secp256k1KeyPair() { var keyParams = ECKeyGeneratorParameters(ECCurve_secp256k1()); var mnemonic = getMnemonic(); var seed = bip39.mnemonicToSeed(mnemonic); print('mnemonicToSeed=========$seed'); var random = FortunaRandom(); random.seed(KeyParameter(seed)); var generator…
using the web3.eth.account.create() method returns: { address: "0xb8CE9ab6943e0eCED004cDe8e3bBed6568B2Fa01", privateKey: "0x348ce564d427a3311b6536bbcff9390d69395b06ed6c486954e971d960fe8709", signTransaction: function(tx){...}, sign: function(data){...}, encrypt: function(password){...} } How to make safety saving private keys to mongodb? I was researching bcrypt, hashcode, but hascode is not safety and bcrypt encoding requires…
hardhat.config.js require("@nomicfoundation/hardhat-toolbox"); /** @type import('hardhat/config').HardhatUserConfig */ module.exports = { solidity: "0.8.18", }; /* @type import('hardhat/config').HardhatUserConfig*/ require("@nomiclabs/hardhat-ethers"); require('dotenv').config(); const { API_URL_KEY, PRIVATE_KEY } = process.env; module.exports = { solidity: "0.8.17", defaultNetwork: "goerli", networks: { hardhat: {}, goerli: { url: API_URL_KEY, account:…
I am building a crowdfunding blockchain application and I am getting the above error. Uncaught (in promise) Error: Function "getDonators" requires 1 arguments, but undefined were provided. Expected function signature: contract.call("getDonators", _id: BigNumberish): Promise<string[], BigNumber[]> This the code for the…