Error: personal_unlockAccount method not implemented - ethereum
I'm testing with nethereum(.Net integration library for Ethereum) trying to unlock account API on testrpc with following code:
var ipcClient = ClientFactory.GetClient();
var web3 = new Web3(ipcClient);
// Unlock the caller's account with the given password
var unlockResult = await web3.Personal.UnlockAccount.SendRequestAsync(publicKey, password, _accountUnlockTime);
return unlockResult;
I have executed testrpc on powershell, and have 10 default accounts created by testrpc, and want to unlock on of them.
calling this method i get following exception:
Error: RPC method personal_unlockAccount not supported.
Testrpc does not have the capability to unlock accounts, this is specific of a client like Geth.
Related
Get list of recent added/deployed smart contracts
Is there a way to retrieve the most recent added/deployed smart contracts to the ethereum chain? Thanks a lot for any advice. Regards, JR
Newly deployed contract addresses are not directly available through the node RPC API (and its wrappers such as ethersjs and web3js), but you can build a script that
Subscribes to newly published blocks
Loops through transaction receipts on the block
And searches for contractAddress property of the transaction receipt
The contractAddress property returns null if the transaction does not deploy a contract (most transactions) or an address if the transaction deploys a contract.
The above mentioned approach only retrieves contracts that were deployed directly - by sending a transaction with empty to field and data field containing the contract bytecode.
It does not retrieve contracts that were deployed using an internal transaction. For example it would not catch the following Hello contract deployment (that is deployed by executing the deployHello() function).
pragma solidity ^0.8;
contract Hello {}
contract HelloFactory {
event Deployed(address);
function deployHello() external {
// deploys a new instance of the `Hello` contract to a new address
address deployedTo = address(
new Hello()
);
emit Deployed(deployedTo);
}
}
If you want to retrieve deployments of these contracts as well, then you'd need to debug each newly produced block and search for the create and create2 opcodes (each of them deploys a new contract, they take different input arguments).
So overall, it's not a simple task but it's doable.
It's generally discouraged to recommend any specific 3rd party APIs and tools here at StackOverflow. But I'm guessing that there are already some existing services that do all of this on their backend, and are able to return the aggregated list of newly deployed contracts as a result.
Thanks to the help of Petr Hejda I created the following Python code:
import sys
import time
from web3 import Web3
def connect():
# infura API key
API_KEY = "INFURA_API_KEY"
# change endpoint to mainnet or ropsten or any other of your account
url = f"https://mainnet.infura.io/v3/{API_KEY}"
w3 = Web3(Web3.HTTPProvider(url))
# res = w3.isConnected()
# print(res)
return w3
def get_latest_block(connection):
return connection.eth.get_block('latest')
def get_latest_block_id(block_information):
return block_information['number']
def search_new_contracts(connection, block_information):
block_transactions = block_information['transactions']
# print(block_transactions)
for transaction in block_transactions:
transaction_data = connection.eth.getTransaction(transaction)
if transaction_data['to'] == "":
print(f"Contract creation transaction: {transaction_data}")
print("Block searching done")
if __name__ == "__main__":
current_block_number = sys.maxsize
connection = connect()
while True:
latest_block = get_latest_block(connection)
latest_block_id = get_latest_block_id(latest_block)
if current_block_number is not latest_block_id:
print(f'New block detected: {latest_block_id}')
search_new_contracts(connection, latest_block)
current_block_number = latest_block_id
Problem is that it is slow so I have to see if I can speed things up.
Ethers.js metamask request limit exceeded
I’m trying to connect to contracts on BSC, it worked fine for half a year, now it’s starting to give errors, it’s with contract.on, when reading something from the contract it works fine To connect the provider and the signer to work with contracts, I used the default entry for connecting to the metamask from the ethers.js documentation: const provider = new ethers.providers.Web3Provider(window.ethereum); const signer = provider.getSigner(); started getting errorenter image description here tried doing this: await window.ethereum.enable() const provider = new ethers.providers.Web3Provider(window.ethereum); const signer = provider.getSigner(); I also tried to connect via rps, but it didn’t happen at all what I needed: export const provider = new ethers.providers.JsonRpcProvider(settings.bsc.rpcNodeUrl); export const wallet = new ethers.Wallet(settings.wallet.privateKey, provider) export const signer = wallet.connect(provider);
You need to get a paid RPC node. Binance has cut down the APIs and limits of free nodes. Even better run your own node.
Passing wallet argument in ethers Contract function
I am trying to create an instance of a contract on ethers.
const example = new ethers.Contract(CONTRACT_ADDRESS, contractABI, signer);
I am using a wallet directly instead of getting a signer through metamask ( I am aware of the risks)
Here is my "signer":
const signer = new ethers.Wallet("PRIVATE_KEY");
When i try to execute the code I get:
ethers-5.5.4.esm.min.js:1 Uncaught (in promise) Error: invalid address or ENS name (argument="name", value={"_isSigner":true,"address":"0x92388d12744B418eFac8370B266D31fd9C.....","provider":null}, code=INVALID_ARGUMENT, version=contracts/5.5.0)
Do I have a syntax error? or is this not the correct way to pass a wallet as a signer
I think you might miss your provider there, you'll need to add provider object like this
const url = "RPC Node URL"
const provider = new ethers.providers.JsonRpcProvider(url);
const signer = new ethers.Wallet("PRIVATE_KEY", provider);
Use the right RPC Node network to interact with the right blockchain. You can either use public or private RPC, but for production it is recommended to use private services.
You did not connect to the signer. From docs // this creates a new contract address new ethers.Contract( address , abi , signerOrProvider ) // Returns a new instance of the Contract, but connected to providerOrSigner. contract.connect( providerOrSigner ) ⇒ Contractsource In your code: example.connect(signer)
How do I solve the Smart Contract error "returned values aren't valid"?
I am trying to read basic information from a smart contract using web3.js (GRAPH Token):
https://etherscan.io/address/0xc944e90c64b2c07662a292be6244bdf05cda44a7#code
This is my super simple react web3.js setup:
import Web3 from 'web3';
...
useEffect(() => {
const start = async () => {
const web3 = new Web3('https://bsc-dataseed1.binance.org:443')
const abi = [{"inputs":[{"internalType":"uint256","name":"_initialSupply","type":"uint256"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"account","type":"address"}],"name":"MinterAdded","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"account","type":"address"}],"name":"MinterRemoved","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"}],"name":"NewOwnership","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"}],"name":"NewPendingOwnership","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[],"name":"acceptOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_account","type":"address"}],"name":"addMinter","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"burn","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"burnFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"subtractedValue","type":"uint256"}],"name":"decreaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"governor","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"addedValue","type":"uint256"}],"name":"increaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_account","type":"address"}],"name":"isMinter","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_to","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"mint","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"nonces","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pendingGovernor","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_owner","type":"address"},{"internalType":"address","name":"_spender","type":"address"},{"internalType":"uint256","name":"_value","type":"uint256"},{"internalType":"uint256","name":"_deadline","type":"uint256"},{"internalType":"uint8","name":"_v","type":"uint8"},{"internalType":"bytes32","name":"_r","type":"bytes32"},{"internalType":"bytes32","name":"_s","type":"bytes32"}],"name":"permit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_account","type":"address"}],"name":"removeMinter","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"renounceMinter","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"sender","type":"address"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_newGovernor","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"}]
const address = '0xc944E90C64B2c07662A292be6244BDf05Cda44a7'
const contract = new web3.eth.Contract(abi, address)
console.log(contract);
const i = await contract.methods.getName().call()
console.log(i); // => ERROR
}
start()
}, [])
And it throws error:
Error: Returned values aren't valid, did it run Out of Gas? You might also see this error if you are not using the correct ABI for the contract you are retrieving data from, requesting data from a block number that does not exist, or querying a node which is not fully synced.
This is a known and misleading error which usually means that the address or the contract abi is invalid but I verified it is correct.
I researched this error for two days but didn't manage to solve this issue... any suggestions?
You're trying to interact with an Ethereum contract, using a BSC (Binance Smart Chain) Web3 provider (in your case https://bsc-dataseed1.binance.org:443). This results in trying to call the getName() function on the BSC address (which doesn't contain any contract). Ethereum and BSC are different networks, unrelated to each other. Solution: Use an Ethereum mainnet provider (for example Infura is widely used).
quickfixj Integration with External OMS
I am doing a development to integrate a non Java OMS system with QuickFIX/J to send buy/sell orders to multiple brokerage systems .
I have written the belog logic to send the messages
I have written this under main function which is in the same class created by implementing Application "public class Initiator implements Application"
InputStream inp = InitiatorSocket.class.getResourceAsStream("test.cfg");
SessionSettings sessionSetting = new SessionSettings(inp);
Application myApp = new Initiator();
FileStoreFactory factory = new FileStoreFactory(sessionSetting);
ScreenLogFactory sfactory = new ScreenLogFactory(sessionSetting);
DefaultMessageFactory defaultMsgFactory = new DefaultMessageFactory();
initiator = new SocketInitiator(myApp, factory, sessionSetting,sfactory,defaultMsgFactory);
initiator.start();
SessionID sessionId = initiator.getSessions().get(0);
I am using the below code to send messages after continuously listening a directory using while Loop.
while(true)
{
readFilefromSrcDirectory();
prepareFixMessage();
Session.sendToTarget(fixMessage, sessionId);
}
My above code is getting executed while debugging but when I run it normally, the Session.sendToTarget(fixMessage, sessionId); and other file read related logic which is next to initiator.start(); is not getting executed.
Kindly note that the same above code is getting executed if we add some console print statements such as System.out.print("Test");
Please help me.
Are your test.cfg settings between debug and run different? I would add console print statements everywhere and work out exactly where the runtime is failing.