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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Why is my discovery Port value set to 0 instead of 30303?

I have a private blockchain network and I'm trying to connect multiple nodes. But not able to. Using admin.nodeinfo I can see that ports in my nodes are a bit weird: ports: { discovery: 0, ...
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Private Ethereum Node is unable to add peers

My genesis file (used same for both nodes) "config": { "chainId": 42, "homesteadBlock": 0, "eip150Block": 0, "eip150Hash": "...
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Geth error: flag provided but not defined

Geth version Geth Version: 1.10.20-stable Git Commit: 8f2416a89a3def6ec2c749d5afafbf2c9a18e3c8 Architecture: amd64 Go Version: go1.18.1 Operating System: linux GOPATH= GOROOT=go Error: flag ...
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Best ethereum testnet to deploy smart contracts for IoTs

I want to run a local private Ethereum blockchain on Pis for: To deploy smart contracts To be able to read and control IoT Need advice in: Which testnet is most suitable for this Will it work on ...
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Does Bitcoin fee depend on amount? [migrated]

Does Bitcoin fees depend on amount of bitcoin sent ? On what factors does bitcoin fees depends on?
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Private Polygon Chain

As we have an option to create a private Ethereum chain and a private chain using GoQuorum do we have an option to create a private chain using Polygon and do the transactions among those nodes of the ...
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Fatal: Failed to read genesis file: open ./gen.json: The system cannot find the file specified

I was trying to set-up genesis block on window but facing error Fatal: Failed to read genesis file: open ./gen.json: The system cannot find the file specified.
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Using Hyperledger QBFT suitable for public chains?

I am thing process of creating my own public EVM network, i found the best approach available would be using QBFT on HyperLedger Besu as it is Proof Of Authority and secure for production uses. But ...
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Is Hyperledger possible on Ethereum network?

I was reading about Hyperledger and found out that you can have private network in the block chain. Is it possible to have private network on Ethereum? If it is, how the states and ledgers are ...
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How do I make my own ethereum 1 and 2 network

I would like to run both ethereum 1 and ethereum 2 within a private network. Any ideas on how to do this? By private network I do not mean just on my system, but I mean being able to run the clients ...
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Minimun gasprice on geth

I have created a private miner network and I want to put a minimum gasprice. I have a problem because even if I put a gasprice with --miner.gasprice, I can still make transactions with a gasprice of 0....
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Hide input of an already mined transaction in GoQuorum

Imagine an account has created an already mined transaction in a GoQuorum network, with private data in the transaction input. Is there any option to hide the input data of a given transaction? I know ...
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Recommendation for blockchain network selection

Is it a good idea to use fabric for one network, one organization (with multiple users), and storing transactions between those? or should I use a simpler blockchain network? I want the transaction to ...
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How to increase OPCODE gas Price in Hyperledger Besu

I want to setup Private POA blockchain using hyperledger besu. I dont want people to deploy smart contract on the chain. I searched on google and found it some alternative solution to increase create ...
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Invalid difficulty while adding Peer on private newtwork (forked geth)

I had created a fork of geth v1.10.17-stable-174ce54e and changed source code of consensus.ethash.go and update function calcDifficulty to return static difficulty 10. I had built geth from this ...
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Geth doesn't handle Large number of Requests

We have a privateblockchain setup in an ec2 instance, I am trying to send 300 requests in one minute from a node server to the privateblockchain using web3.js The blockchain server runs out of ...
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Create a private Ethereum network on Azure

Is there a way to create a private eth network on Azure? The private network is going to be used by the developers to test the smart contracts. Azure provides multiple resources to use: Azure ...
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Getting error on my genesis block

Fatal: invalid genesis file: hex string of odd length on my genesis block { "nonce":"0x000000000000042", "difficulty":"0x4000", "alloc": {"...
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How can my geth listen to my domain,

i have setup my geth private node on my ubuntu server and sofar so good localhost running perfectly. and now i really want to use my domain http://rpc.example.com instead of http://localhost:8545. and ...
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Ethereum private network not connected using Boot node

I am trying to build a private ethreum network in AWS instances with multiple public IP. In my EC2-1 I created a boot node using the following command. bootnode -genkey boot.key I run the boot node ...
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How to run bootnode in public IP in Ethereum Blockchain

How can I run bootnode with my public IP address? I am running following command. bootnode --genkey=boot.key bootnode --nodekey=boot.key --writeaddress bootnode --nodekey=boot.key --addr:$(...
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How to migrate a Private Chain to POS

I run a POW private chain and would like to update it to POS. Does anyone have already performed such migration? Should I mimick the different phases (0,1,1.5 and 2) or it is possible to apply the ...
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Block capacity - Hyperledger Besu

Good afternoon, I am trying to perform a transaction capacity test on my network with Hyperledger Besu with 4 validator nodes and a time per block of 4seconds. I have created a script with NodeJS that ...
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In code Go-Ethereum in which file to change the name of the cryptocurrency?

As I understand it, from the source code of Go-Ethereum, it is possible to fork the blockchain. Sorry, I'm not an expert on this issue, and if you say to go to Github and change the source, I just won'...
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how to unlock my ethereum private network account in geth version 1.10.16

when I try to unlock my Ethereum private network account in go-Ethereum version 1.10.16, it show error like this, how could I overcome this? Error: Error: account unlock with HTTP access is forbidden ...
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Consortium networks - safety concerns

After studying the different types of blockchain networks and their advantages in the enterprise space and after opting for permissioned networks to form a consortium, my questions are: What are the ...
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go-ethereum clique stop mining after one block, each node

After a whole day trying, it's time to ask. I have 14 nodes using go-ethereum that used to work just fine. I generated 14 accounts, inserted them in signers and voters in the genesis file, created the ...
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Private network, Remix works fine, every other sendTransaction fails other than contract functions that are payable

Have a basic POW private network running with the latest geth. Things are half working and failing oddly. If I use Remix IDE I can call every function (send and query) of a deployed contract and it ...
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Do QBFT of quorum mine empty blocks?

We are currently using RAFT as the consensus protocol as it has the highest TPS, fastest block creation, and no empty block creation. However, recently GoQuorum tutorials highlighted not to use RAFT ...
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Create blockchain from scratch with smart contract support

I'm looking to create a private blockchain from scratch for an academic project with its own cryptocurrency (looking to make a fiat-based stablecoin). I managed to code a simple infrastructure on my ...
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State root mismatch error at mining genesis block

I am working on a private Besu implementation. I made some modifications to the open source package, and when I went to start a new chain instance it gives a state root mismatch error for the genesis ...
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PoA Geth Network - Change % required to add a new sealer node. Is it possible?

I have been researching about how to add sealer nodes to a network with Proof of Authority and Cliqué algorithm using the Geth client. But I can't find information on how to change the % needed to ...
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Is there a field to let a custom msg like Satoshi did for Bitcoin in the genesis file? [duplicate]

For a "private" ethereum network (private as not ethereum mainnet) I would like to know if we can set custom fields in genesis file. Is just the hash of the file that matters and we can add ...
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Chain ID & Network ID for Ethereum private network

I have question regarding the Chain ID and Network ID for Ethereum Private networks as I have been unable to find a solution online. I am just confused as to how the network IDs and Chain IDs are ...
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tx fee exceeds the configured cap in a private ethereum sidechain

i need your help with this one. I have been struggling with the same issue for days now. I'm getting this error response (tx fee exceeds the configured cap (1.00 ether) when i try to set a relatively ...
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Private network nodes can't find peers

I have 4 nodes (each on a separate droplet on digital ocean) in a private network: bootnode miner1 miner2 jsonrpc Each node is initialized with geth --datadir ./data init ./genesis.json using the ...
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With permissioned blockchain, can DAOs be made secure?

Because of its open-source nature, everyone can see the codes, principles, etc. My question is can a permissioned blockchain like Hyperledger fabric SECURE DAOS? Can people still see the code of DAOs ...
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Where in the source code is the 15 seconds block time target?

Where is the variable that target 15 seconds block time in the source code? On this reddit post rgey talk about a "DurationLimit" but I can't find it on the ethreum go repository. Thanks for ...
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Would it be possible to change the 15 seconds block time to 1 min?

Do you know if it is possible for ethereum forks to increase the 15s block time to for instance 1 min block time or 2 minutes block time? Moreover I noticied that when we start new blockchain the ...
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How Dithereum System Contracts actually work? [closed]

As I know the transaction fee distributions, system rewards distributions and all are happening in the Dithereum System Contracts. So, Is there any documentation or resources where I can learn more ...
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"Failed to start child: Explorer.Staking.ContractState" error when we add staking contract in Blockscout

Blockscout is working fine in the Dithereum Testnet. But when we add the stacking contract in blockscout, then it thows this error. screen shot attached. Any help appreciated. Thanks.
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Uncaught (in promise) TypeError: instance.events is undefined

I am getting this error. Uncaught (in promise) TypeError: instance.events is undefined App.contracts.UkTokenSale.deployed().then((instance)=>{ console.log(instance); instance.events....
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How can blockchain be applied other than cryptocurrencies?

How can blockchain be applied other than cryptocurrencies? May I ask for some diagrams that abstractly explain the system behind the non-monetary application of blockchain? I cannot seem to wrap my ...
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how to reduce transaction fees on private blockchains?

I have some questions regarding transaction fees on private blockchain. I'd appreciate your help. Also, if there are any references I can read about this, please let me know. Do transaction fees ...
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What is the process of creating a hard fork of Ethereum? [duplicate]

I am interested in creating a hard fork of Ethereum for production use. The idea is to end up with a separate blockchain similar to Ethereum Classic. As previously stated, I will be using this ...
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Have been having this error, ParserError: Expected ';' but got '}'

// SPDX-License-Identifier: GPL-3.0 pragma solidity >=0.7.0 <0.9.0; contract will { address owner; uint fortune; bool deceased; constructor() payable public { owner = ...
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How to calculate block propagation latency in Geth?

i am trying to calculate block propagation latency in a private network. is there a command for it? please share some thoughts on how can we arrive at the calculation .
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In Go Ethereum private chain what is the maximum limit of number of transactions in a single block

What is maximum limit of transaction packaging in single block ? Can it be increased ? If yes how ?
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Connecting to Private Geth Blockchain network using MetaMask

I am new to Blockchain and created a private geth network in Aws EC2. I need to connect my metmask wallet to that network. From my metamask wallet , I am not able to see that network. Kindly let me ...
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Where can I get a list of blockchain network?

Ethereum is just one network out of many? Where can I get a list of blockchain networks (ethereum, bitcoin, ripple, Stellar)?
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