Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

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.

0
votes
0answers
16 views

Delay on receiving block by peered node

Sometimes it takes an around of 25ms to import new block by the other peered node after mined by miner. But sometimes it increases directly around 400ms to import block by peered node after mined by ...
0
votes
0answers
8 views

web3j-quorum error “The constructor ClientTransactionManager(Quorum, String, List<String>) is undefined”

I'm trying to deploy a smart contract (7 nodes sample from Quorum) using web3j quorum.but it is giving me following errors error 1 : The constructor ClientTransactionManager(Quorum, String, List) ...
0
votes
2answers
26 views

Set up backup from private Ethereum (Ganache) [duplicate]

I have created an ethereum application with Ganache and truffle js. i have installed ganache in a server, and th application work. but when i stop the server i lose the the smart contract that i have ...
0
votes
2answers
20 views

How to backup POA based ethereum private blockchain and restore it in a fresh new environment

Is there a way to backup the POA based ethereum private block-chain [created from microsoft azure POA template] and also restore it in a all new environment with out loosing any transactions & ...
1
vote
1answer
18 views

Boot Node issue

When I create a bootnode, I am not getting the enode. So I used this link for reference to derive it. However, the below is happening. It seems that the bootnode address is 128 bits whereas it is ...
1
vote
0answers
19 views

Image and file storage in block chain

Is it possible to store a base64 image code as string in block chain? I know we can use IPFS or Swarm as a tool to store an image or a document, but if someone gets to know about the hash anyone can ...
0
votes
1answer
23 views

I have question about private block chain gas structure

I have a basic question about gas price charged for transaction. Say I have a private ethereum block chain with ten nodes and I don't want to charge any fee for the transaction taking place in this ...
0
votes
1answer
17 views

PoA private net keeps mining blocks at high rate with no transactions

I am creating a private network based on Clique (PoA) and I have a certain problem with the amount of blocks mined by my two nodes. The number of blocks is very high I quickly reached hundreds of ...
0
votes
1answer
27 views

How to gather all addresses of nodes in a private network?

I am currently learning core-development in go-ethereum. I am a little weak with networking, RPC and connections. I am trying to write a function in my own consensus mechanism that gathers all ...
1
vote
1answer
32 views

Peering over a direct L2 link without IP addresses

As part of a big solution incorporating blockchain and data networking, I'd like to know how would 2 nodes establish a blockchain peering on their direct L2 Ethernet Link that has no IP addresses ...
1
vote
1answer
35 views

How to create Multi-node private ethereum blockchain network (windows platform)

I need help in how we can create multi-node private network on ethereum blockchain preferably on windows platform. My Approach (please suggest if I can follow some better one): First I want to try to ...
1
vote
1answer
36 views

Understanding what happens between transaction creation and block creation in Proof of Authority

I am currently writing my thesis where I'm investigating the potential of blockchain technology to become the underlying technology in a system that is create and record qualifications. I'm at the ...
2
votes
1answer
21 views

Where is the function that rewards the miner address for mining the block?

I have recently been digging into go-ethereum and have 'plugged' my own consensus mechanism which requires a node to solve a simple equation (2+2) etc to seal a block. However, even after letting it ...
1
vote
0answers
23 views

Geth and Private Blockchain Mining

I am trying to set up a private blockchain for the first time with a Geth client. After initializing my custom genesis json file, running the networkid in the console and setting up a couple of ...
1
vote
2answers
34 views

web3j: EthSendTransaction.sendTransaction() is throwing “Error processing transaction request: Invalid params: invalid format”

I am trying to send a transaction to an address: 0xDD210......... using the EthSendTransaction.sendTransaction() method from the org.web3j.protocol.core.methods.response.EthSendTransaction library. ...
2
votes
0answers
32 views

Quorum :- metamask do not support privateFor feature of quorum

i got to know that metamask do not support privateFor because of which private transaction for quorum dapp was not behaving as expected. so, I can't use metamask for my quorum DApp to switch port and ...
3
votes
0answers
53 views

Miner accepting 0 price transactions

I am hosting a private blockchain and I am testing out the Geth functionality. I have deployed a Solidity contract based on the Greeter example. The functionality is not important, but suffice to say ...
1
vote
0answers
30 views

I have connected two notes using bootnode in ethereum private blockchain but mining is not started why?

I have generated the enode from Bootnode in Ethereum private network and i connected three individual nodes using that enode through Bootnode, and i have checked whether that nodes are connected or ...
2
votes
0answers
34 views

Private network: Using geth to mine for parity nodes

I want to set up a private Ethereum network using a parity client. Ideally, I want to resemble the "real" Ethereum network as close as possible. Thus, I want to set up a proof of work network. For ...
1
vote
1answer
23 views

Where goes eth cost in private chain

I have a private test blockchain with ganache. I deploy one contract and make a couple transactions. Looking at the ganache UI I realized that the first account haves a ether consume to make the ...
0
votes
1answer
21 views

Unable ts start Bootnode, am new to private blockchian, Can anyone tell me what am i missing

bootnode : The term 'bootnode' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or if a path was included, verify that the path ...
1
vote
0answers
26 views

Removing sealers from clique genesis

Running a private POA with clique. I know it is possible to add and remove signers using clique.propose(). However, If I lose access to one of the sealers defined in the genesis file is it possible ...
1
vote
0answers
15 views

simulation or performance evaluation with Ethereum testnet

I was if you could help me about simulation. How can I simulate the performance of my following IoT-based Application with Ethereum testnet? In my senario,there are some nodes that store sensor data ...
0
votes
0answers
30 views

Simulation with private Ethereum

I need a simulator or environment to simulate my Internet of things network with following scenario: There are N number nodes as Miners(Roadside Unit in a smart city) that store transactions sent by ...
3
votes
2answers
952 views

What happens if you transfer ether and no miner is running?

What happen if I transfer ether from account a to account b on a private chain with just one node and that node is not mining?
1
vote
0answers
33 views

What possibly could go wrong if I leave my private blockchain node 30303 port open to public? [duplicate]

I have the following setup: All the nodes inside my cluster are talking to each other via 30303 port. When I want to talk to them, I'm using a Geth light client via HTTP JSON RPC port 8545. Only the ...
0
votes
0answers
15 views

How to modify existing geth commands

I am wondering if it is possible to modify existing commands on geth. For example the command $puppeth would produce this +-----------------------------------------------------------+ | Welcome to ...
2
votes
1answer
98 views

Deploying a smart contract from EVM Bytecode via rpc calls

I am currently trying to deploy a smart contract with bytecode in a private Ethereum chain, using the "dev" chain of the parity client. For this, I compiled the following contract: pragma solidity ^...
0
votes
1answer
45 views

Cloning geth and adding a POS consensus algorithm? [closed]

I am currently learning how to use geth, so far I was able to create a private POW and POA blockchain using one of its consensus types (Clique). I am wondering how feasible it would be to clone the ...
0
votes
0answers
27 views

Setting up a private chain with parity and transferring funds to new account

I am currently experimenting with Ethereum and trying to set up a private blockchain using parity. For this, I created the genesis file below. I then booted two parity nodes with the following command ...
0
votes
1answer
70 views

Clique PoA Private Blockchain: Need Suggestion for Block Gas Target and Block Gas Limit

I'm following this article to create my own PoA private blockchain. Now I'm stucked at this section after number 13: I've checked the Puppeth source code and Geth CLI docs, but I'm still not quite ...
1
vote
0answers
64 views

Puppeth: No ethstats server configured

Update This is an issue with Docker Compose >= 1.23.0 and I've raised this in the go-ethereum GitHub issues tracker. I'm following this guide to create my own private blockchain using PoA consensus. ...
0
votes
0answers
28 views

function assigning wrong variable

I have a function to set an address variable to a contract address to only accept payments from. When the function is called truffle is showing that the variable is staying at null and ever weirder a ...
2
votes
1answer
17 views

How to change the crypto-currency that is used in paying for gas fees in a private network

I have deployed my own network of blockchain that is based on the ethereum network. I wanted to know if one could change the currency used to pay for the gas on the private network.
1
vote
0answers
14 views

Generating genesis.conf for Clique PoA private network via command line

I'm trying to generate a Clique POA genesis file that specifies the original sealers using automation. However, puppeth only supports user input at the moment. There's no support for command line ...
0
votes
1answer
17 views

DApp on Node2 accessing smart contract deployed by Node1

Node 1(Desktop) deployed a contract on private blockchain. From node2(Laptop),I want to interact with the contract. But I failed at 'web3.version.getNetwork(err, netId)' function.This function throws ...
1
vote
1answer
22 views

Not connecting to private blockchain from another node on the network [duplicate]

I have a Desktop and Laptop.I have configured private blockchain on my Desktop(node1) and able to sync with it from Node2 Laptop.But I am not able to get connected to the contract deployed on Node 1 ...
0
votes
1answer
16 views

how to include transations in genesis block

can one please advise how to include transactions in the genesis block of private ethereum network ? can it be done via genesis.json similarly to contract using code: parameter ?
1
vote
0answers
25 views

How to create private chain in trinity / py-evm?

I am doing academic research using ethereum and want to use trinity / py-evm for the same. I have installed trinity and py-evm now next steps for me is to create a private chain and write some ...
0
votes
1answer
17 views

Configuring geth so that it can only connect to my private local blockchain?

Basically I would like to know how to configure geth so that it can only connect to my private ethereum blockchain that is hosted on another machine? Many thanks in advance!
1
vote
1answer
61 views

How to get Nodes on local Geth Private Network to Discover Peers OF THEIR PEERS

I am working on a private blockchain that consists of 4 nodes running on different ports. I am trying to get each node to communicate its connections to its peers, so the network would be fully-...
0
votes
1answer
31 views

Ideal Blockchain decentralized app [closed]

I want to know your opinions about what do you think the best architecture for building a decentralized application? Taking into consideration the global adoption, and how to avoid telling the users ...
0
votes
2answers
43 views

Blockchain app technical architecture

Let’s say I want to build an app that is not completely decentralized, in fact it serves Restful APIs to the frontend and uses a private ethereum blockchain in the backend to process sensitive data ...
0
votes
2answers
57 views

Two Ethereum Node (connected to private net) on Single PC: Node data write error .Synchronisation failed [duplicate]

Is it possible to create 2 geth instance on single PC? Both are connected the private blockchain? When I connect a node to the private blockchain,it must sync with the blockchain by downloading all ...
0
votes
1answer
45 views

Access private blockchain from another PC/Laptop?

I have private block chain on my PC.The private blockchain is configured and deployed using geth. I want to connect to that blockchain from another node(my laptop) to access the smart contract ...
0
votes
1answer
68 views

how to setup hybrid PoW+PoS or PoA private network (geth)

I am aware about PoW and PoA setups of ethereum private networks but would like to know if anyone could help or point me the direction how to build a hybrid PoW + PoS or PoW + PoA ethereum based ...
1
vote
0answers
35 views

smart contract and permissioned blockchain

I have some IoT(Internet of things) nodes sharing the received data from sensors with each others. I partitioned them to 2 permissioned networks: Network 1 includes: X,Y,Z nodes trusting each other. ...
0
votes
1answer
18 views

Geth Contract Deployment Error : Contract transaction couldn't be found after 50 blocks

I have created a private blockchain and tried to deploy a simple contract on blockchain. But the deployment throws the following error - Error sending/minig the transaction: { "message": "...
1
vote
1answer
20 views

Ethereum Private network for Production use case

When I should consider to use Ethereum Private network for Production use case? Can I dictate network difficulty rules and apply permission on such network. Regards Dev
1
vote
0answers
39 views

Error in mist : exceed block gas limit

I am trying to deploy a smart contract in private network using mist, but when I deploy my contract and provide transaction fee as 0.04 ether it throws error as exceeding block gas limit. Here is the ...