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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44 views

Same genesis for private network?

I have initialized one private node using geth and Genesis file, and now I want to span another node, in genesis file, I have mentioned on the account which will be pre-funded now I want Ans of below ...
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86 views

Private network with limit supply

I'm just wondering if is possible to create a private network (Not development) with this characteristics: Max supply One account has all the supply already Nodes/peers can't mine Gas cost is always ...
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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). ...
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1answer
28 views

Easier Installation of privatenode for non-technical users

I have seen documentation of creating privatenet using geth. But it holds few commands which will not be a better option for users/clients who doesn't have technical knowledge to use the application ...
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1answer
181 views

Private Ethereum Smart Contract API call to notify (without needing the external api response to update the state) without using Oraclize

In a Private Ethereum Smart Contract, can we do an external API call just to notify (without needing the external api response to update the state) without using Oraclize? Understand Oraclize is ...
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1answer
181 views

How to call a contract function that alters blockchain state on geth console

It should be easy, but I'm having a hard time using a simple smart contract described in the Solidity language reference called SimpleStorage. It only as one attribute, a setter and a getter, and I'm ...
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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 ...
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1answer
71 views

connecting geth to web3.go 1.0 via websockets or HTTP

Is there anyThing similar to web3.js written in go that allows me to communicate with the geth client ?
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2answers
48 views

connect users to the sidechain SKALE

SKALE is Ethereum Dapps to run high speed, Low cost smart contract layer. I wish to connect users to the sidechain SKALE,from their browser. automatically without the manual change as necessary for ...
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2answers
63 views

Ethereum Enterprise Blockchain

I am starting a project that I need to build a solution to track products (ex: from farm until it gets to the supermarket) Basically, I need to set up a blockchain structure for my company(private) ...
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1answer
54 views

Why do I always get “Returned values are not valid, did it run Out of Gas”?

I'm new on Ethereum blockchain and I'm working on deploy and using smart contract using truffle on my private blockchain. I have followed exactly this guide https://www.trufflesuite.com/docs/...
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63 views

Oraclize usage on blockchain

Is it possible to use oraclize for the purpose of communicating between ethereum private and public blockchains? For example, if i triggered an event in private blockchain, that event should be ...
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1answer
76 views

Update private chain from homestead to byzantium

I need to update my the version of my chain from homestead to Byzantium. Who can tell me how to do it? thanks.
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2answers
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How to get network hash rate of ethereum blockchain via geth console or web3

I want to know about how can i get ethereum blockchain network hash rate via geth console or web3. Like the result of this api - https://www.etherchain.org/api/miningEstimator { "blocktime":"14....
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1answer
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Custom miner checks in a private chain?

I have used the ideas from the link [1]How to make miner to mine only when there are Pending Transactions? in my private chain. I have a couple of questions, - How can I add custom code on the miners ...
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1answer
192 views

Getting “gas required exceeds allowance (93846700840810) or always failing transaction” on private network. How to access geth client via nodejs?

I have recently started using Ethereum. I am trying to test my contract using multiple machines. Only solution I found was to setup a private network using Geth and add peers. Following is the genesis ...
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Mining stops after some time in my Hyperledger-besu Private blockchain

I have been using Hyperledger-Besu's quickstart guide to build my private blockchain (with ibft2 as consensus algorithm) on an AWS instance, which basically just clones that repo https://github.com/...
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1answer
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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 ...
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1answer
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How to use private blockchains in ethereumjs-tx@2.1.2?

I know this method var transaction = new Tx(rawTransaction, {chain:'ropsten'}); I tried var transaction = new Tx(rawTransaction, {chain:'192.168.XX.XX:8545'}); But get Error: Chain with name 192.168....
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1answer
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Invalid block XX: unknown ancestor while restoring the chain - private blockchain

I'm trying to restore blockchain using import a rlp file geth import backup.rlp It show an error Is there any way to exclude the bad blocks while exporting the chain data? Also, if the gcmode is ...
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1answer
29 views

geth mining not working without --allow-insecure-unlock (geth 1.9.16-stable-ea3b00ad)

I am running a private ethereum blockchain with POA geth --port 3000 --networkid 42 --datadir=./blkchain --maxpeers=5 --rpc --rpcport 8543 --rpcaddr 127.0.0.1 --rpccorsdomain "*" --rpcapi &...
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1answer
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mining transaction in private blockchain

I am new to the blockchain issue, and I have read about it, but I had these questions. When I actually implement a private Blockchain on every transaction it costs a certain gas. Who pays for this ...
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1answer
80 views

How to handle exceptions in ethreum private network using revert(),throw

I am running a private ethereum network using geth --rpc --rpccorsdomain "*" --datadir ./chaindata --port "30330" --nodiscover --rpcapi "db,th,net,web3" --networkid 2010 init genesis.json and ...
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2answers
389 views

Quorum 7nodes example unable to attach to geth node 1,2,4,5,6,7 but node 3 is working

Quorum 7nodes example all of sudden gave fatal error unable to attach to remote geth. Problem: can't attach to geth node Every time I import metamask account to geth node (using personal.importRawKey(...
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2answers
283 views

error in remix IDE

I am facing this type of Error in 'remix IDE' while connecting it to 'web3.js@0.20.2' Error: Failed to decode output: Error: insufficient data for uint256 type (arg="", coderType="uint256", value="...
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1answer
48 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 ...
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1answer
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Fatal: Failed to write genesis block: unsupported fork ordering: eip150Block not enabled, but eip155Block enabled at 0 genesis block

I am attempting to launch a private geth chain with the following command: geth --datadir=./test-private-blockchain/ init genesis.json I am receiving the following error: Fatal: Failed to write ...
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2answers
438 views

Modify number of confirmations

By default there are 24 confirmations but I am running a testnet with just 3 miners and I would like to change this number bucause it makes not sense to have 24. I have been checking ...
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0answers
25 views

Issue with failing to detect peers via Bootnode on Local Network

I am attempting to connect various nodes to my private blockchain on my local network using a bootnode to discover peers. Connecting the peers on the local machine running the bootnode is possible, ...
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1answer
191 views

Why use a private block chain over a shared database?

Isn't a shared database able to provide all the guarantees that a private block chain could provide. Since you can track transactions,have transaction restriction and have authenticated access to ...
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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) ...
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24 views

Could not Able to start my genesis block “Fatal: Account unlock with HTTP access is forbidden!”

I am getting some problem while i am trying to mine for my genesis block on my Geth command prompt "Fatal: Account unlock with HTTP access is forbidden!" could anyone please provide me help ...
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2answers
139 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 & ...
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1answer
28 views

Attach to tessera node failing

Im installed quorum with tessera but when i need to attach to any node using command $ ./attach.sh 1 show error "Fatal: Unable to attach to remote geth: dial unix qdata/dd1/geth.ipc: connect: no ...
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19 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 ...
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1answer
69 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 ...
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1answer
689 views

Extremely slow geth mining and synchronization for private blockchain

I am constructing a very simple 2 nodes private Ethereum network to study the mining behaviour. The consensus algorithm is ethash. In order for the 2 nodes to discover each other, I also setup a ...
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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 ...
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1answer
172 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 ...
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1answer
162 views

Minimum requirements for private chain miner

We are currently building a model with raspberry pi 3 to demonstrate a usecase in our university. When we try to run a miner on the raspberry pi 3 it crashes when creating a new block. We want to ...
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1answer
202 views

Ethereum private chain not able to addPeer

I created a private chain with my friend with exactly the same genesis block and we wanted to connect through the admin.addPeer method. The problem is that for some reason they are able to connect to ...
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1answer
49 views

Pending transactions not mined in private network

I have created a node with the following genesis block: { "config":{ "chainId":9119, ...
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2answers
200 views

Mining, Ethers and Private Blockchain DAPPs

I am building a private Blockchain cluster DAPP envisaged to have 5 to 10 parties owning their own nodes (or node clusters). At this moment, there is no specific mandate to incentivize miners, though ...
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1answer
185 views

Not able to add ether in my private network's account

1. I have created a small ethereum private network. I opened launched the private network from terminal 1, launched the geth console from terminal 2, and opened mist browser in terminal 3. Once mist ...
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1answer
997 views

Remix error “gas required exceeds allowance or always failing transaction” on private blockchain

I'm trying to test contract interaction using Remix with two basic contract: contract Callee contract Caller Callee function/variable: uint[] public values; function storeValue(uint value) { ...
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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 ...
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0answers
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BlockNumber stuck on 0 while a private network node is looking for peers

I'm extremely new to Blockchain and mining, and I've followed this tutorial to create my first private blockchain. I am stuck when it comes to mining and I'm afraid I'm quite lost. Afte I've started ...
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1answer
162 views

Mist : Getting error Couldn't connect to node? See the logs for more:

First I started the private network and connected with 2 node . After I opened another terminal and used the command to open the mist: open -a /Applications/Mist.app --args --rpc /usr/local/Cellar/...
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1answer
136 views

Sending Ether from private Geth node to Mist Account

I have Sended Ether from my private geth node to an another account created by metamask. I have choosed custum RPC to metamsk, with the valide IP and Port, Also i have activated rpc in my geth node. ...
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1answer
283 views

Private Ethereum Chain and Web3 js API

I've developed my own private chain for testnet using geth and CLique and i have some issues with web3.js environment. I starts my nodes using the console parameter in order to get to the Web3 console ...

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