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Questions tagged [private-blockchain]

Private blockchains are not available for the public and are maintained/secured by a cluster of trusted nodes. These kind of blockchains are useful when dealing with sensitive information.

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How to mine on a POS private network

For testing purposes, I source-installed go-ethereum and built a private network. After setting up the genesis.json file, I successfully created a private network, but I don't know how to mine the ...
deuk's user avatar
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Hyperledger Caliper - Can we build a work load module that can invoke and query from already deployed contract in the blockchain?

I am trying to benchmark a smart contract that interacts with an already deployed contract on the blockchain using Hyperledger Caliper. The overall framework is functioning correctly for other ...
111Seven's user avatar
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1 answer
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I updated Solidity to version to 0.6.12. Now the code is broken, how to fix?

How can I fix my code, the chainid is 9999.I tried changing chainId := chainid to chainId := chainid() but it doesn't work. Here is the whole code: pragma solidity 0.6.12; import './interfaces/...
Mr. arikodus's user avatar
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2 answers
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Whitelist Addresses in Solidity Contract

I'm trying to whitelist a single *address to be able to interact with this smart contract: pragma solidity >=0.4.22 <0.7.0; contract VisitorTracking{ struct Location{ string ...
howtomqttblockchain's user avatar
1 vote
1 answer
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How to setup a private GoEthereum network

I'm studying Ethreum by creating by own private ethereum network. I have three basic question. I will give as much information as I can to help to get great responses. My network setup is very simple: ...
JDN's user avatar
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Ethereum Private Network Upgrade Help

I want to mimic the Dencun upgrade on my private network which is currently running the Shanghai version. I want to understand how to upgrade the ethereum network without stopping it / restarting it / ...
Vidhan Mangla's user avatar
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Geth Private Network - Account management

I'm building a private blockchain using Geth. I created 2 accounts with command geth --datadir miner-node account new and geth --datadir rpc-node account new, then I added their address to genesis....
revSurfer's user avatar
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CBDC Community , Corda r3

i am trying to build a cbdc prototype using corda r3 , is there anyone with knowledge about this project that can help or any recommandations or communities to try to reach to ? maybe corda r3 ...
Youssef's user avatar
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1 answer
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Geth version 1.14.4-stable Error: authentication needed: password or unlock. Transfer issue?

I want to make a transfer between two wallets; one is the address I set up on my private blockchain, and the other is my Metamask address. However, I keep encountering the same error. I have attached ...
yukara's user avatar
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Geth private network security

I'm implementing a private network with Geth, which is expected to go into production for a client. What are the most important points to focus on regarding the security of my blockchain? I was ...
revSurfer's user avatar
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Is it possible to establish a local network between specific Ethereum accounts within the same operational system using Geth?

I tried to launch a local network using Geth. I mean a network of just one running system that hosts some Ethereum accounts. I did that by the below config file and the below command to run Geth node. ...
Alireza's user avatar
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Server returned HTTP status 404 Not Found

I am running a local ethereum PoA(clique) network in my windows computer using geth with 2 nodes. I am very new to this. I am trying to get the performance data of the chain using prometheus. I used ...
Dinith Arunasiri's user avatar
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27 views

Lodestar Becon Layer Error

I am trying to set up a beacon client for my private network, I got this error, Error: First offset must equal to fixedEnd 2736633 != 2736653. What does this mean? The config.yaml file for the beacon ...
Vidhan Mangla's user avatar
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0 answers
37 views

Hyperledger-caliper Ethereum Benchmarking (Error: nonce undefined)

I am using hyperledger-caliper to benchmark the Ethereum local network (Ganache). The contract is a simple storage contract, nothing fancy. I can deploy the contract using the code provided below. But ...
111Seven's user avatar
2 votes
0 answers
106 views

Is there a way to set up a PoS private blockchain

I am tryiong to set a PoS eth v2 private blockchain using geth and prysm I ve been trying lots of different things but do not mange to extend the working example I found : https://github.com/...
Bruno's user avatar
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"Waiting for deposit to be observed by beacon node pubKey=0x8b189a7f4669 status=UNKNOWN_STATUS" in Prysm Private Net

I followed "https://www.reddit.com/r/ethstaker/comments/jrkbe2/my_checklist_to_create_and_verify_accounts_and/" to run the validator in my private devnet using staking-deposit-cli and ethdo. ...
Bhavika's user avatar
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Account Balances Not Updating When Interacting with Smart Contract on Private OpenEthereum Network

Context: I have set up a private Ethereum network using OpenEthereum, configured with four nodes: a validator node, two non-validator nodes, and an RPC node. This setup is part of a project for a ...
Martin's user avatar
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1 vote
0 answers
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How to measure the block production rate of the private chain

I recently built an Ethereum private chain(clique) with two nodes. The genesis file is as follows: { "config": { "chainId": 53783, "homesteadBlock": 0, &...
lpx's user avatar
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0 answers
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WARN [01-03|14:06:54.902] Block sealing failed err="unauthorized signer"

{ "config": { "chainId": 12345, "homesteadBlock": 0, "eip150Block": 0, "eip155Block": 0, "eip158Block": 0, "...
miner's user avatar
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How to join a channel in Hyperledger from another server?

I've deployed a chaincode on my VM i.e 192.168.4.110. Everything is working fine when I test it locally. Now I want my second VM i.e 192.168.4.112 to connect with the above Hyperledger's vm Channel. ...
Hamza Shafeeq's user avatar
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Geth private POA network behaving strangely

The Setup I have setup a private POA network using geth (v1.10.14). My network configurations are as following; BlockTime: 1sec Consensus: Clique Number of Signers: 3 Number of Miners: 3 I have ...
Asad Hayat's user avatar
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0 answers
93 views

Geth and Lighthouse peers are added, but none of them are downloading / importing blocks from peers?

i am trying to run a private PoS network on a private organizational network (all ips are accessible only if you're connected to organization's intranet ) I am using geth as Execution Client and ...
Muhammad Yasir's user avatar
0 votes
1 answer
46 views

Not able to use Private blockchain network in Safe-Infrastructure

i have my own private blockchain deployed via quorum and configured safe-infrastructure also on my local. the issue is whenever i am using Linea Georli testnet network i am able to create safe wallets ...
Nikhil Verma's user avatar
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1 answer
184 views

Geth transactions not broadcast and stuck in pending state

Setup three Geth private network nodes(Clique) via docker container. They are deployed on three different VMs. Among 3 nodes, there is a miner node to mine the block, a RPC node to accept RPC request, ...
abcuse1111's user avatar
1 vote
0 answers
37 views

How to check if a certain hard fork is enabled in your network?

We are running a private PoW (Proof of Work) network on geth I would like to know, how can i determine if a certain hard fork is enabled on my network ? For instance, how will i check if the London ...
Muhammad Yasir's user avatar
0 votes
0 answers
25 views

Recover funds from a smart contract wrote a mistake by developers

Our developer has deployed a errored smart contract for a autopool plan, but the plan was expired 3 years ago. Users transfered funds to this contract. I am wondering if I can get back these funds ...
Nagalingeswaran C's user avatar
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0 answers
8 views

Bootnode issue of unknown peer

When I am running a bootnode on AWS for a private blockchain and creating it, multiple peers are pinging it. What issues can arise, and how can I prevent other peers that we haven't connected from ...
Mustakbil Pakistan's user avatar
1 vote
0 answers
323 views

How to run a PoS private network with geth & lighthouse?

So far for testing contracts, transactions and other dApp experiments I had worked with pre-established testnets (Rinkeby, Goerli etc) now i am tasked with deploying a private PoS network based on ...
Muhammad Yasir's user avatar
0 votes
1 answer
42 views

depolying system contracts for new evm blockchain

i was trying to fork a dpos evm blockchain , how to deploy system contracts for dpos and slash and get the "code" data in genesis file as below ? "alloc": { "...
ft_lauderdale's user avatar
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1 answer
162 views

How to change the gas price and gas limit in private blockchain

I wan to change the gas price and gas limit in the private blockchain as you know the currrent contract limit is 21000 so I want to change the default and also the gas limit I wan to cut more than 1 ...
Mustakbil Pakistan's user avatar
0 votes
0 answers
18 views

etherbase address changes automatically in a private network

I am running a private Ethereum PoW network, which has a miner with a public IP address. Unfortunately, my miner's etherbase address is switching to an unknown address: "...
S.Rti's user avatar
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0 answers
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Connecting to a private Blockchain via a Dapp

How can I choose an a node to randomly connect to on the cluster? I can already connect my Dapp to the private node. But what happens in case that node is not available or a different node is more ...
Divyya's user avatar
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1 vote
0 answers
27 views

Node Permissioning over Governance Smart Contract has problems in OpenEthereum Chain

I work at a supply chain solution that uses a Private, Permissioned, Open Ethereum Chain. Everything is configured over Smart Contracts (Permissioning / Validators / Allowed Nodes). These have an ...
Markus Knecht's user avatar
1 vote
0 answers
226 views

GETH - BAD BLOCK : Error: invalid merkle root - Transactions and block stuck in pendings

I'm having problems with geth when I try to send transactions on my private blockchain being developed using Geth. Practically a block is blocked in pending with around twenty transactions inside it ...
AlexCav's user avatar
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0 votes
0 answers
40 views

Performance Analysis of Private Ethereum Blockchain using Prometheus and Grafana

I have built a private blockchain network using goEthereum with PoA consensus model using Clique. The nodes are live and connected. I want to measure its performance(Throughput, latency..), using ...
Zero's user avatar
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2 votes
1 answer
77 views

RPC endpoint for production environments

Context For testing environments, I'm spinning up AWS instances with App-chain client nodes and using the AWS ALB to access the exposed RPC endpoint. It is protected by the security group rules, so ...
quantumdust's user avatar
0 votes
1 answer
65 views

How to give a name to my forked Ethereum blockchain

I created my own private blockchain with Go Ethereum, now I want to put my own name for the symbol and network name. To do this, I checked the BSC code, it is a fork of Ethereum, and the BNB name in ...
Mehran Ra's user avatar
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1 vote
0 answers
133 views

Foundry : cast storage command storage slot argument posing length issue

When I try to get the private variable stored at storage slot 0 of the contract storage using the cast storage command, cast storage <my-contract-address> 0 --rpc-url <my-rpc-url> I get ...
h4mster's user avatar
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1 vote
0 answers
7 views

Data is not updating in the chaincode

This is my HTML form <div class="text-center form-container"> <form id="updateForm" action="" name="updateOwner" style="display: none;&...
Jubayer Hossain's user avatar
0 votes
1 answer
43 views

A node just to act as sync point / checkpoint server

I've created a small private blockchain with 3 full nodes 100% synced (1 Exec, 1 Consensus and 1 Validator each). All are working fast and smooth like a charm. Now I need to keep another nodes just to ...
Magno C's user avatar
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1 vote
0 answers
49 views

failed to deploy smart contract on my private network

I created a private network of POA, and I use clef to seal blocks like this: I have successfully run this chain becaues it can produce blocks and I can create transactions between 2 accounts, and ...
jds250's user avatar
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0 votes
0 answers
81 views

I'm running a private Geth PoA chain and my signers are failing to start due to a "gap in the chain between ancients". Is there any help I can get?

So the title doesn't include steps I've tried, given that there are character limits. The long and the short of it is that I'm running a private geth PoA chain and my signers/sealers were getting a ...
This Guy's user avatar
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0 answers
59 views

Consensus and Execution don't sync anymore after restart

After put my private blockchain to run ( from https://docs.prylabs.network/docs/advanced/proof-of-stake-devnet ) I was happy because all was working very fine. But after I stop my 3 containers: The ...
Magno C's user avatar
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0 votes
1 answer
27 views

How to persist data (the chain itself) in a Docker private blockchain?

I'm creating a Docker private blockcain from here: https://medium.com/scb-digital/running-a-private-ethereum-blockchain-using-docker-589c8e6a4fe8 But I'm afraid to lost all my data if I need to delete/...
Magno C's user avatar
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0 answers
14 views

Get number of created blocks in a day in Quorum

I'm looking for a query to query Quorum node to get the number of blocks created in a day. Is there any direct query to do the same? Also, how to iterate over each created block to check the number of ...
Siva Sankar's user avatar
0 votes
0 answers
29 views

mempool not having broadcasted transactions

I have private ethereum blockchain setup made using geth implementation of two nodes{A,B}. There is a node(A) which is directly connected to the website which sends thousands of transaction to node(A) ...
Naman's user avatar
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0 votes
2 answers
504 views

What are some Tornado Cash alternatives?

I used Tornado Cash in its earlier days, but I stopped using it after it faced sanctions. What are some other dApps available that can be used for private transactions on Ethereum? I'm not referring ...
Maximus Stacks's user avatar
0 votes
0 answers
36 views

Are accounts on Ganache Blockchain considered Nodes?

I wanted to ask a question: the accounts on Ganache are nodes, for example I mean, if I am in the project, I let the account send the transaction to another account This process considers that you are ...
Ghada AbdulWahab's user avatar
0 votes
1 answer
23 views

Guidelines of How to be a Blockchain Developer by Own Without a CS Degree

I want to develop my career in blockchain. I am a beginner. Can I have any guidelines on how to become a blockchain developer, please? I have learned just C and the basics of structured programming. I ...
Marjuk Sajid's user avatar
1 vote
0 answers
15 views

IP host management in truffle_config.js (Private Ethereum Network)

I have 3 Amazon Ec2 instances (each with a Geth node running on them) and I'm running over them my Private Geth Ethereum (PoA) blokchain and I wanted to ask if it was necessary to specify the IPs of ...
AlexCav's user avatar
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