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.

311 questions with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
1
vote
2answers
625 views

How to connect peers which are on different computers in geth on private network?

I am trying to setup a private network and trying to connect peers. Currently I'm trying it on my laptop and virtual machine(VM) runing on the same laptop (both of them are connected to internet). I ...
1
vote
2answers
560 views

Gas Price Must Be Greater Than Or Equal To 0.1 GWEI in Metamask

I have setup a private quorum network, connected the metamask with my quorum network and it is connecting but when am trying to do transaction getting an alert Gas Price Must Be Greater Than Or Equal ...
1
vote
0answers
287 views

Add new field 'message' for sending text message to specific address

I have created a private net following https://omarmetwally.blog/2017/07/25/how-to-create-a-private-ethereum-network/ holding 4 peers. I run Ethereum Block Explorer ( https://github.com/etherparty/...
1
vote
3answers
2k views

How to connect private nodes over the Internet

I have looked at dozens of similar questions about this, but none seems to have this particular problem. I have created a private network of three nodes on three different machines using geth1.5.5. ...
1
vote
1answer
101 views

Deploying custom code to private network results in “instrinsic gas too low” or “check your gas” errors

TL:DR My first contract fails to deploy reporting variously: Error: intrinsic gas too low undefined Error: The contract code couldn't be stored, please check your gas amount. undefined Having just ...
1
vote
1answer
195 views

Bootstrap node and its permission

If we want to connect to regular node then we have to go through bootstrap node ? What in the case of private chain ?
1
vote
0answers
28 views

unable to insert into a struct from a address where the contract is not deployed

I am planning to make a blog using solidity. I've made a contract. Here it is. pragma solidity ^0.4.0; contract Post{ address author; uint _id; struct UserDetails{ string title; ...
1
vote
1answer
159 views

Raise more ether in Parity POA chains

From the wiki of private chains in parity Parity also includes Proof of Authority Chains which do not require mining. Is it possible to raise more ether in an existing POA chain? Use case Lets ...
1
vote
0answers
306 views

Why nodes are not discovering each other in my private network?

I have created a private network with my own Genesis file. My private network has totally 4 systems(1 bootnode and other 3 are nodes). I am running the bootnode in v4 using these two commands. ...
1
vote
0answers
475 views

ICO - question regarding private network

my team and I have been working on developing an application, based on a private ethereum network, due to the high gas cost of our contracts on the main chain. Now we would like to proceed to the ...
1
vote
1answer
135 views

Cannot get Mist working with geth --dev

I have read all over the internet the past 2 days and i still can not get Mist to work with a geth private chain I am running geth --dev then opening mist and getting this error I have read the ...
1
vote
0answers
514 views

How to restart mining in my private blockchain?

I successfully setup a private blockchain in my laptop and mined around 5160 Ether (no market value). Also deployed a smart contract. Now I had to close my laptop and when I came back and turned the ...
1
vote
0answers
97 views

Ethereum performance when fetching transactions from blocks

I need to fetch the completed transactions from the ethereum blockchain ledger. At the moment I am retrieving individual blocks in order to fetch the transactions using web3.eth.getBlock synchronously....
1
vote
1answer
136 views

iOS node not syncing with private BKC

I use the Geth framework and Swift 4 to boot a node inside an iOS 11.0 app. This node connects to my local BKC (to 4 nodes to be precise). Here are some tests I made : if I start 3 computer nodes ...
1
vote
0answers
185 views

Is there some way to save an array (write file) through geth to a text file?

I'm looking to save or extract an array inside a file.js file in geth console to a text file. I have shearched this subject but i could find nothing related to this. Is this possible? I tried: /....
1
vote
0answers
207 views

Unable to add peers through bootnode

I have created three nodes on a private ethereum blockchain passing a unique networkid flag along with usage of the same genesis file . Now two of them are running on remote machine , and one on my ...
1
vote
0answers
281 views

Connecting two private nodes on different machines

My college network is divided into different subnet. In a subnet, I am able to connect two different machines by admin.addPeer("enode Address with ipv6 ip and port"). But when i changes my subnet, ...
1
vote
2answers
725 views

Private ethereum network on AWS

I am having trouble creating a private ethereum network on AWS. I have enabled TCP/UDP for the desired ports in the firewall in AWS. On one node A(aws instance) I start the geth console by making use ...
1
vote
0answers
154 views

Trying to run private blockchain in console stops after successfully writing genesis block

I am trying to run private blockchain geth --networkid 100 --identity node1 --verbosity 3 --nodiscover --nat none --datadir=~/Documents/testmeteor/ init ~/Documents/testmeteor/Genesis.json console. ...
1
vote
0answers
154 views

ERROR: NetworkId mismatch

I got stuck with the error: ERROR: NetworkId mismatch: 3 (!= 1100) Running geth node with parameters: geth --rpccorsdomain "*" --ipcapi "admin,eth,miner" --rpcapi "eth,web3" --networkid 1100 --...
1
vote
0answers
405 views

How can we login/unlock ethereum account using keystore file as “UTC--<created_at UTC ISO8601>-<address hex>”

What I have successfully unlock account with password using web3 api(personal.unlockAccount). What I Want If user did not remember their account password, in case of that I want to unlock account ...
1
vote
0answers
189 views

Point testrpc to a custom genesis file

Following this answer, I'm using testrpc to create a large number of unlocked accounts: testrpc -a 1000 This seems to create a new blockchain. Is there a command option to point it to a custom ...
1
vote
0answers
140 views

how to see all old commited transactions of a node in geth

I created a ethereum node using geth and I made certain number of transactions. All the transactions are mined and showing the correct balance. How can I see all my old transactions? Also I did ...
1
vote
0answers
133 views

Can EthereumJ connect with geth in my private network?

I0908 10:55:59.650726 p2p/peer.go:301] Peer c944075180d7ede0 172.21.101.100:30303: Starting protocol eth/62 I0908 10:55:59.650903 eth/handler.go:252] Peer c944075180d7ede0 [eth/62]: peer connected [...
1
vote
0answers
560 views

greeter.address Undefined while deploying the contracts

From Past 3 Days I am trying to deploy my 1st greeter contract But always I am getting the Undefined greeter.address. Below Steps I am following 1) geth Version C:\Block_Chain\Eth_1>geth version ...
1
vote
0answers
75 views

Optional Data Feed on the EVM, what does it mean?

I am trying to understand the idea of optional data feed for EVM in the accounting field especially. I usually read that you can use two fields with the first field being a domain to register and the ...
1
vote
0answers
29 views

geth Sending payload over and over

I'm working with a private chain. Sometimes after trying to create a contract it gets stuck spitting out this over and over: I0616 15:17:12.778089 32745 http.go:157] Sending payload: [ { ...
0
votes
0answers
10 views

What would be good result measures in Ethereum

I'm thinking of a way to present relevant results measures for my blockchain. I can see how for hyperledger is interesting to present (transactions per second x block size) or (latency x block size). ...
0
votes
1answer
16 views

Private Blockchain Node Migration

I had a private ethereum blockchain with 1 node running in production. I accidentally ran a geth init genesis.json --datadir . command in my main node. Did this command overwrite the data directory ...
0
votes
0answers
16 views

Can smart contract sate copy from one private blockchain to another?

I'm working with private blockchain(PoA), and we're looking for a disaster recovery plan for the chain. Currently, we have two instances 1) one is running API(node + web3) and interacts with the 2) ...
0
votes
0answers
21 views

Connecting geth and openethereum on a private network

Private network, running geth 1.9.15 and openethereum 3.0.1. Parity converter was used to create the chain.json file for openethereum. The two node show the exact same: genesis block network id ...
0
votes
0answers
23 views

ERR_SSL_PROTOCOL_ERROR while connecting private blockchain

I'm working with private blockchain, and facing some issue with SSL configuration. The system has two components: The private blockchain that is configured on the VM. The web application that ...
0
votes
1answer
29 views

How to reset private ethereum blockchain (Geth)?

I am running private ethereum blockchain using ethereum and now I want to reset the chain and delete all the contracts, transactions and logs and restart everything from block 0. What is the best way ...
0
votes
0answers
31 views

Error: “Couldn't decode uint256 from ABI: 0x” Private Ethereum Network web3js MetaMask

I am trying to call the smart contract for data using this code and every time I am getting this error. I am using a Private Ethereum Network with MetaMask. The calling function is given below. ...
0
votes
0answers
17 views

Why is Smart Contract call() method returning NULL in Ethereum Private Blockchain

This is where I am calling the contract function certify_find (hash, callback) { contract.methods.findDocHash(hash).call( function (error, result) { if (error) { console.log("Returned ERROR ...
0
votes
0answers
27 views

MetaMask - RPC Error: Error: [ethjs-rpc] rpc error with payload [obejct Object

I am trying to sign transactions using certify_send() function to a smart contract deployed to my private ethereum blockchain but I keep getting this error after I approve in MetaMask MetaMask - RPC ...
0
votes
0answers
12 views

1) How can we use Ethereum Alarm Clock for Scheduling a txn in Private network(using geth/ganache)

2) Can we schedule a txn in such a manner that it could be executed multiple times in a particular time window?(For eg: if we need to schedule the txn everyday 5.00 pm) or the EAC has the option of ...
0
votes
1answer
16 views

Scalability of private chain with 0 block time

What could be some issues in scalability if a block time of 0 is set to a private ethereum blockchain? If I set it to zero, blocks will only be added to the blockchain every time there's a single ...
0
votes
0answers
16 views

sending transaction giving an error of “unknown account” after some time interval in Geth

I have review kinda same questions on this site, however, the issue in my case is different hence I'm asking. I have setup three nodes for the private chain, and it's working fine. I can send ...
0
votes
0answers
10 views

Ethereum Wallet(mist) not catching private network in windows 10

I have set these paths but not working C:\Program Files\Ethereum-Wallet and C:\Program Files\Geth I have made a private network using Geth, but when I installed the Ethereum Wallet, it is not ...
0
votes
0answers
9 views

How can two light nodes on a chain communicate individually?

Let's say I have two light nodes on a chain and I want them to exchange data ~3KB without appending anything to the chain. They are not on local network. How can I achieve it?
0
votes
0answers
10 views

Fail Transaction Using Metamask And Create Smart Contract Using Geth Private Blockchain

I have an error when building a private blockchain on my computer. The code that I run is like this (Simply my concept make it without mining and only focus on smart contract): genesis.json file { ...
0
votes
1answer
44 views

How other party can access my contract?

I am running private ethereum blockchain. As we know smart contract is used for agreements between non-trusting parties. Now, I am wondering how the other party can access/see my smart contract? ...
0
votes
0answers
12 views

Eth 2.0 Private Chain

Now that Eth 2.0 testnet is in place, do we have a source to create a private chain of Eth2.0, similar to the private chain implementation of Eth 1.0. Any pointers are of great help Regards, Manoj
0
votes
0answers
17 views

uPort with private blockchain, is it free?

If I use uPort for a private blockchain, this means that all the transactions for identity management will be performed in the private network and are free?
0
votes
0answers
17 views

Peer nodes of another server not getting connected in private blockchain

I'm doing setup of a private blockchain using PoA, and facing issue in connectivity with peers of another server. I'm using geth 1.8.16, and created genesis file using puppeth. Structure Server-1 ...
0
votes
0answers
19 views

How to deploy a contract when a private chain start?

ethernet vererion: 1.8.x, language: golang 1.11.x I wrote a smart contract in solidity. The contract's contructor has two parameters like this: uint256 _initialAmount, string _tokenName I ...
0
votes
0answers
20 views

Starting Up tutorials for hyperledger fabric and Caliper Framework

I am new to Hyperledger world. My goal is to set up hyperledger fabric on my machine. Then, setting up a simple smart contract on the blockchain network. Then, using caliper to do measurements such as ...
0
votes
0answers
13 views

Miners are not working when running geth command in background in linux

I am running my private blockchain using geth on my ubuntu server with following cmd then its working fine geth --datadir ~/chaindata/ --networkid 45123 --verbosity 3 --rpc --port 30304 --rpcport ...

1 2 3
4
5
7