Most voted questions in Blockchain

+1 vote
1 answer

Why is it so difficult to find a nonce while validating a block in Bitcoin?

A nonce is just "some arbitrary number". In ...READ MORE

Apr 11, 2018 in Blockchain by Perry
 • 17,100 points • 2,052 views
+1 vote
1 answer

What are the key functional differences between Hyperledger Composer and Fabric Javascript SDK?

Hyperledger Composer is an application development framework ...READ MORE

Apr 11, 2018 in Blockchain by Perry
 • 17,100 points • 1,518 views
+1 vote
1 answer

How do i generate corda nodes keystores in dev mode?

In Corda, the node will look into ...READ MORE

Apr 11, 2018 in Blockchain by Perry
 • 17,100 points • 1,627 views
+1 vote
2 answers

Can I include real world data in a smart contract? If so, how?

You cant access/embed real world data using ...READ MORE

Jul 18, 2018 in Blockchain by sapan
 • 1,073 views
+1 vote
4 answers

How can we search a block using transaction Id(TxID) or hash?

The most obvious use case would be ...READ MORE

Apr 10, 2018 in Blockchain by Johnathon
 • 9,090 points • 4,050 views
+1 vote
1 answer

How Blockchain work in a mobile app?

At present there is no provision to ...READ MORE

Apr 10, 2018 in Blockchain by Johnathon
 • 9,090 points • 614 views
+1 vote
1 answer

How to decide on a nonce while developing a blockchain?

A nonce should be decided on the ...READ MORE

Apr 10, 2018 in Blockchain by Shashank
 • 10,400 points • 1,200 views
+1 vote
1 answer

How do i change the names of validating peers in IBM Bluemix blockchain?

IBM Bluemix Blockchain service Hyperledger Fabric v0.6 will ...READ MORE

Apr 11, 2018 in Blockchain by Perry
 • 931 views
+1 vote
4 answers

How to estimate the cost for deploying smart contract on mainnet?

Since you have already deployed the contract ...READ MORE

Apr 10, 2018 in Blockchain by Shashank
 • 10,400 points • 15,430 views
+1 vote
5 answers

Difference between internal-external, private-public in function

External: These functions are part of the ...READ MORE

Apr 8, 2018 in Blockchain by Shashank
 • 10,400 points • 9,044 views
+1 vote
7 answers

What are the advantages and limitations of hyperledger composer over fabric?

While hyperledger composer is a set of ...READ MORE

Apr 8, 2018 in Blockchain by Perry
 • 17,100 points • 3,598 views
+1 vote
1 answer

What problem does pow(proof of work) solves in blockchain?

Proof of Work: When a miner gets a ...READ MORE

Aug 6, 2018 in Blockchain by digger
 • 26,740 points • 1,112 views
+1 vote
1 answer

What are the differences between coin and token?

Coins are cryptocurrencies that are independent and ...READ MORE

Jul 18, 2018 in Blockchain by Sahil
 • 782 views
+1 vote
1 answer

Do we need metamask extension to make transactions on ether?

Actually, we don't need Metamask. To make ...READ MORE

Apr 8, 2018 in Blockchain by Perry
 • 17,100 points • 1,192 views
+1 vote
1 answer

Can a data be altered in a blockchain without changing its hash?

Yes, it should work. The authentication practice ...READ MORE

Apr 8, 2018 in Blockchain by Shashank
 • 10,400 points • 810 views
+1 vote
1 answer

How blockchain nodes switches to another chain?

Each individual transaction is validated by every ...READ MORE

Apr 8, 2018 in Blockchain by Christine
 • 15,790 points • 787 views
+1 vote
8 answers

How is Blockchain a linked list?

Blockchain is similar to Single Linked List ...READ MORE

Aug 3, 2018 in Blockchain by Omkar
 • 69,230 points • 13,495 views
+1 vote
1 answer

How hyperledger fabric is stored on a PC?

Firstly, your web application will interact with ...READ MORE

Apr 7, 2018 in Blockchain by Christine
 • 15,790 points • 797 views
+1 vote
1 answer

Can we copy a smart contract?

While the contract is open-source, if you ...READ MORE

Apr 7, 2018 in Blockchain by Christine
 • 15,790 points • 2,099 views
+1 vote
1 answer

How are blocks are mined and shared among all Validating Peers in the Hyperledger network.

Hyperledger peers neither mine the block nor ...READ MORE

Apr 7, 2018 in Blockchain by Christine
 • 15,790 points • 635 views
+1 vote
1 answer

What are the differences between the hyperledger and Blockchain?

To answer your first query.. Blockchain is ...READ MORE

Apr 5, 2018 in Blockchain by anonymous
 • 4,130 views
+1 vote
2 answers

How a merkle tree is generated?

In a Merkle tree, transaction IDs (txid) ...READ MORE

Apr 5, 2018 in Blockchain by Shashank
 • 10,400 points • 1,047 views
+1 vote
1 answer

Hyperledger network roles assigned to peer nodes.

In a hyperledger fabric network transactions are ...READ MORE

Apr 4, 2018 in Blockchain by Christine
 • 15,790 points • 1,354 views
+1 vote
1 answer

I would like to create a blockchain network which will stay at the same level of complexity, is it possible?

You can very easily create a cryptocurrency having a ...READ MORE

Apr 4, 2018 in Blockchain by Christine
 • 15,790 points • 799 views
+1 vote
2 answers

Hyperledger - Can I have some instances on one network while on a Virtual Box?

Yes, you can connect multiple instances to ...READ MORE

Aug 1, 2018 in Blockchain by Omkar
 • 69,230 points • 862 views
+1 vote
1 answer

How is a smart contract stored on a Blockchain?

Smart contract template and transaction events are ...READ MORE

Apr 4, 2018 in Blockchain by Christine
 • 15,790 points • 1,052 views
+1 vote
1 answer

How does different blockchains differs on the basis of protocols?

Blockchain platforms differs in more than many ...READ MORE

Apr 4, 2018 in Blockchain by Shashank
 • 10,400 points • 619 views
+1 vote
1 answer

How is Blockchain used for provenance purposes?

Let me tell you how Blockchain could ...READ MORE

Apr 4, 2018 in Blockchain by Shashank
 • 10,400 points • 621 views
+1 vote
2 answers

HyperLedger Fabric Java SDK - Wrinting the ChainCode Sample in Java

To get started developing Java chaincode Ensure you ...READ MORE

Aug 3, 2018 in Blockchain by Omkar
 • 69,230 points • 4,394 views
+1 vote
1 answer

Unable to send payment using API. Please help.

Firstly, check your passwords, your API code and your wallet ...READ MORE

Apr 3, 2018 in Blockchain by Christine
 • 15,790 points • 1,090 views
+1 vote
2 answers

Is there any relation between the number of transactions processes and the miners?

the direct answer to your query is ...READ MORE

Jun 19, 2018 in Blockchain by Perry
 • 17,100 points • 723 views
+1 vote
1 answer

Transaction using Blockchain wallet APi

Each transaction requires a fee to be ...READ MORE

Jun 19, 2018 in Blockchain by Perry
 • 17,100 points • 668 views
+1 vote
2 answers

How is Blockchain programming languages different than usual programming?

The programming syntax of most of the ...READ MORE

Mar 30, 2018 in Blockchain by Christine
 • 15,790 points • 1,073 views
+1 vote
1 answer

What is Ethereum Blockchain? Where is it being used?

Blockchain is a decentralized distributed database of immutable records, ...READ MORE

Apr 3, 2018 in Blockchain by Christine
 • 15,790 points • 1,072 views
+1 vote
1 answer

Can Blocks be reorganized in the blockchain?

In practical applications, invalid transactions can not ...READ MORE

Jul 18, 2018 in Blockchain by Varun
edited Aug 3, 2018 by Omkar • 670 views
+1 vote
1 answer

How does the geth ethereum platform automatically connect to the nodes that are in the main network of Ethereum?

When you start with Geth you need ...READ MORE

Mar 28, 2018 in Blockchain by Perry
 • 17,100 points • 1,259 views
+1 vote
1 answer

Getting issues while Sending signTransaction with web3.js

The chain ID for ropsten is 3. ...READ MORE

Mar 28, 2018 in Blockchain by Johnathon
 • 9,090 points • 3,723 views
+1 vote
1 answer

How do I create a relationship between list of suppliers and a single order in Hyperledger Composer

Is your transaction actually called 'OrderPlaced' (in ...READ MORE

Mar 28, 2018 in Blockchain by Johnathon
 • 9,090 points • 1,298 views
+1 vote
1 answer

In the Hyperledger Fabric architecture where is the SDK hosted?

Hyperledger client SDK is a component used ...READ MORE

Mar 27, 2018 in Blockchain by Christine
 • 15,790 points • 974 views
+1 vote
2 answers

Hyperledger: get “/bin/bash: ./scripts/script.sh: No such file or directory” when running “./byfn -m up”

You can follow these steps : In your ...READ MORE

Mar 27, 2018 in Blockchain by ned_crew
 • 1,610 points • 3,582 views
+1 vote
1 answer

I am unable to change port of composer-rest-server. Please help!

Use full format for running a business ...READ MORE

Mar 27, 2018 in Blockchain by Christine
 • 15,790 points • 1,090 views
+1 vote
1 answer

Blockchain - Virtual box is set up and error while executing Hyperledger example from github

The challenge you are facing is mostly ...READ MORE

Mar 27, 2018 in Blockchain by Gabriel
 • 680 points • 1,023 views
+1 vote
2 answers

Challenge while setting up Hyperledger Fabric 1.0 in Ubuntu 16.04

The rocksdb error you're seeing wouldn't be ...READ MORE

Mar 27, 2018 in Blockchain by ned_crew
 • 1,610 points
edited Jun 8, 2020 by Sirajul • 1,110 views
+1 vote
1 answer

How does a miner get to know that a transaction is verified by all the nodes?

Contrary to the popular belief, it is ...READ MORE

Mar 27, 2018 in Blockchain by Johnathon
 • 9,090 points • 2,749 views
+1 vote
1 answer

When is the Transmission of new blocks happen between nodes of the network?

When a block is mined, it is ...READ MORE

Mar 27, 2018 in Blockchain by Johnathon
 • 9,090 points • 628 views
+1 vote
1 answer

How to deploy ethereum smart contracts on a website?

There are many ways to do this: 1 ...READ MORE

Mar 27, 2018 in Blockchain by Johnathon
 • 9,090 points • 1,875 views
+1 vote
1 answer

Language in which cryptokitties is programmed?

Cryptokitties is built on the Ethereum network. The ...READ MORE

Mar 27, 2018 in Blockchain by Johnathon
 • 9,090 points • 641 views
+1 vote
1 answer

Security Properties of Hash Functions

The difference is indeed subtle. I understood ...READ MORE

Mar 27, 2018 in Blockchain by Johnathon
 • 9,090 points • 4,392 views
+1 vote
1 answer

Where is the Open API Specification generated by composer-rest-server stored in a Hyperledger Composer?

By default, the docs are at your ...READ MORE

Mar 26, 2018 in Blockchain by Christine
 • 15,790 points • 889 views
+1 vote
1 answer

Which blockchain framework should I learn?

There are a few frameworks to choose ...READ MORE

Mar 26, 2018 in Blockchain by Perry
 • 17,100 points • 561 views
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