Trending questions in Blockchain

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Transaction cost variations in one contract vs. multiple contracts

You are free to choose whatever works ...READ MORE

Apr 19, 2018 in Blockchain by Christine
• 15,790 points
37 views
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1 answer

How can I modify stored data in blockchain??

One of the important feature of a ...READ MORE

Apr 18, 2018 in Blockchain by Christine
• 15,790 points
65 views
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1 answer

How is data retrieved in Ethereum?

Blockchain uses the concept of Merkle trees ...READ MORE

Apr 16, 2018 in Blockchain by Shashank
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85 views
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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
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309 views
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How secure is to implement blockchain at a smaller scale??

Blockchain relies on the number of nodes ...READ MORE

Apr 18, 2018 in Blockchain by Perry
• 17,020 points
40 views
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1 answer

How can I write complex decentralized applications on Etheruem?

Well, if you want to create a ...READ MORE

Apr 18, 2018 in Blockchain by Perry
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34 views
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1 answer

Is it possible to setup private ethereum network for creating applications??

yes, ethereum is an open source platform ...READ MORE

Apr 18, 2018 in Blockchain by Christine
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38 views
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Distinguish between private blockchains and hashgraph, ripple

Most of the distributed databases are fault ...READ MORE

Apr 18, 2018 in Blockchain by Christine
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32 views
+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
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148 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 10, 2018 in Blockchain by Perry
114 views
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In public blockchains each computer normal user maintain the ledger, is it scalable enough to do so?

To access or use the blockchain you ...READ MORE

Apr 11, 2018 in Blockchain by Johnathon
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42 views
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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
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349 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
• 9,080 points
58 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 9, 2018 in Blockchain by Shashank
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81 views
0 votes
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What are the differences between tendermint and hashgraph?

Hashgraph uses Superior distributed ledger technology. Hashgraph ...READ MORE

Apr 7, 2018 in Blockchain by Shashank
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163 views
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Do we need metamask extension to make transactions on ether?

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

Apr 7, 2018 in Blockchain by Perry
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91 views
+1 vote
1 answer

Blockchain declining my API key and I cannot understand why.

It's quite easy. Request the API key using ...READ MORE

Apr 3, 2018 in Blockchain by Christine
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266 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
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501 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 7, 2018 in Blockchain by Shashank
• 10,350 points
51 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 6, 2018 in Blockchain by Christine
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91 views
+1 vote
1 answer

How blockchain nodes switches to another chain?

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

Apr 7, 2018 in Blockchain by Christine
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32 views
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What happens to the ethereum mempool transaction of uncle and fork nodes

I understand that in Bitcoin network when ...READ MORE

Apr 7, 2018 in Blockchain by Christine
• 15,790 points
112 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
131 views
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1 answer

Can we copy a smart contract?

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

Apr 6, 2018 in Blockchain by Christine
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72 views
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1 answer

How hyperledger fabric is stored on a PC?

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

Apr 6, 2018 in Blockchain by Christine
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71 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
164 views
0 votes
1 answer

Can a hacker change data of a smart sontract without call contract function?

A contract's content cannot be changed internally. ...READ MORE

Apr 7, 2018 in Blockchain by Shashank
• 10,350 points
34 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
160 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
61 views
0 votes
1 answer

How to create a new wallet on a blockchain?

Firstly, you need to have a clear ...READ MORE

Apr 4, 2018 in Blockchain by Christine
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89 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
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334 views
0 votes
1 answer

If a different chaincode deployed a world state variable, is it still accessible by another chaincode?

No, variables stored by some chaincode (A) ...READ MORE

Apr 4, 2018 in Blockchain by Perry
• 17,020 points
60 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 3, 2018 in Blockchain by Shashank
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50 views
+2 votes
1 answer

What are the difference between various Hyperledger Projects?

Hyperledger incubates a plethora of business blockchain ...READ MORE

Mar 26, 2018 in Blockchain by Perry
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358 views
+1 vote
1 answer

How is Blockchain used for provenance purposes?

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

Apr 3, 2018 in Blockchain by Shashank
• 10,350 points
37 views
+1 vote
1 answer

Security Properties of Hash Functions

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

Mar 26, 2018 in Blockchain by Johnathon
• 9,080 points
343 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
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308 views
0 votes
1 answer

Connection failed to Ethereum Ropsten Testnet network.

 It looks like your node isn't syncing ...READ MORE

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

Challenge while setting up Hyperledger Fabric 1.0 in Ubuntu 16.04

The rocksdb error you are coming across ...READ MORE

Mar 27, 2018 in Blockchain by ned_crew
• 1,620 points
260 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 2, 2018 in Blockchain by Christine
• 15,790 points
63 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
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158 views
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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
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188 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
185 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
119 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 26, 2018 in Blockchain by Johnathon
• 9,080 points
101 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 26, 2018 in Blockchain by Johnathon
• 9,080 points
87 views
0 votes
1 answer

How to make sure transactions take no fee in a private Ethereum blockchain?

In a private ethereum network you have ...READ MORE

Mar 26, 2018 in Blockchain by Christine
• 15,790 points

edited Mar 26, 2018 by Christine 125 views
+1 vote
1 answer

How blockchain node behaves upon receiving a new block when previous block wasn't acquired?

A node will ask for block number ...READ MORE

Mar 26, 2018 in Blockchain by Perry
• 17,020 points
55 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 26, 2018 in Blockchain by Johnathon
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41 views
+1 vote
1 answer

Language in which cryptokitties is programmed?

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

Mar 26, 2018 in Blockchain by Johnathon
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27 views