Trending questions in Blockchain

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How a transaction validity is verified in blockchain?

Blockchain has the records the of all ...READ MORE

May 11, 2018 in Blockchain by Johnathon
 • 9,090 points • 750 views
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1 answer

How do I query Blockchain bitcoin locally?

You could use json RPC provided by ...READ MORE

Apr 19, 2018 in Blockchain by Christine
 • 15,790 points • 1,670 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 • 2,145 views
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1 answer

How to check the data integrity logic in proof of work mining?

The proof of work is actually works ...READ MORE

May 8, 2018 in Blockchain by Johnathon
 • 9,090 points • 814 views
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1 answer

Do I need to create a new validating peer once a new user join my network.?

Hyperledger has evolved a lot. The updated ...READ MORE

May 10, 2018 in Blockchain by Johnathon
 • 9,090 points • 700 views
+2 votes
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
 • 15,790 points • 2,069 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 • 1,731 views
0 votes
1 answer

How can we decrypt a transaction payload when confidentiality is on?

You can try the following: you can only ...READ MORE

May 3, 2018 in Blockchain by Shashank
 • 10,400 points • 848 views
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1 answer

How feasible is it to use one way cryptographic hash function?

you can use the ouput hash function ...READ MORE

May 8, 2018 in Blockchain by Johnathon
 • 9,090 points • 622 views
+1 vote
1 answer

How can I connect my main Ethereum network to Web3.py using python?

All you need to do is enter ...READ MORE

Apr 17, 2018 in Blockchain by Perry
 • 17,100 points • 1,461 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 • 1,621 views
0 votes
1 answer

Why is it downloading the blocks when I am trying to deploy the ethereum private network?

Once you have installed the Ethereum wallet, ...READ MORE

May 3, 2018 in Blockchain by Shashank
 • 10,400 points • 680 views
+1 vote
1 answer

Error while deploying chaincode in IBM Blockchain. Please help.

Try stripping out the 'tree/master' portion of ...READ MORE

Apr 26, 2018 in Blockchain by Christine
 • 15,790 points • 924 views
+1 vote
1 answer

How to store state data in Ethereum blockchain?

You won't have to overwrite the whole ...READ MORE

Apr 25, 2018 in Blockchain by Shashank
 • 10,400 points • 996 views
+1 vote
1 answer

What are the differences between blockchain programming and our traditional programming languages?

On higher level comparison, there are quite ...READ MORE

Apr 18, 2018 in Blockchain by Shashank
 • 10,400 points • 1,283 views
+1 vote
1 answer

Is it possible to store blockchain in a sql or no-sql database?

Currently, following are the options to store ...READ MORE

Apr 21, 2018 in Blockchain by Perry
 • 17,100 points
edited Aug 9, 2018 by Omkar • 1,168 views
0 votes
1 answer

What technologies can be used to build private blockchain technologies?

Blockchain could be private or public. There ...READ MORE

May 8, 2018 in Blockchain by Robbie
 • 510 views
+1 vote
1 answer

How can nodes interact with a Smart Contract?

If you are using Remix IDE to ...READ MORE

Apr 27, 2018 in Blockchain by Perry
 • 17,100 points • 829 views
0 votes
1 answer

What do we mean by a validating peer?

The term validating peer was used in ...READ MORE

Apr 19, 2018 in Blockchain by Christine
 • 15,790 points • 1,161 views
+1 vote
1 answer

How does a blockchain work in hyperledger framework?

Hyperledger Composer simplifies application development on top ...READ MORE

Apr 19, 2018 in Blockchain by Christine
 • 15,790 points • 1,096 views
0 votes
1 answer

In a Blockchain, how difficult is it to modify the third to last block?

Technically, it's not difficult at all, all ...READ MORE

Apr 20, 2018 in Blockchain by Christine
 • 15,790 points • 1,038 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 • 2,002 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 • 1,319 views
+1 vote
1 answer

How is it possible to achieve privacy and confidentiality in smart contracts??

Any contract code written on the blockchain ...READ MORE

Apr 18, 2018 in Blockchain by Shashank
 • 10,400 points
edited Aug 7, 2018 by Omkar • 952 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 • 1,509 views
+1 vote
1 answer

How is data retrieved in Ethereum?

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

Apr 16, 2018 in Blockchain by Shashank
 • 10,400 points • 978 views
+1 vote
1 answer

How can I initiate a transaction on ethereum private network using mobile device?

There is no android wallet to connect ...READ MORE

Apr 18, 2018 in Blockchain by Shashank
 • 10,400 points • 914 views
+1 vote
1 answer

How to setup testnet environment in Ethereum??

You can connect to a node using ...READ MORE

Apr 18, 2018 in Blockchain by Shashank
 • 10,400 points • 914 views
0 votes
1 answer

How pbft is being used in blockchain?

PBFT can tolerate byzantine failures. For tolerating ...READ MORE

Apr 21, 2018 in Blockchain by Perry
 • 17,100 points • 840 views
0 votes
1 answer

What happens if the controller nodes in Corda shuts down, will other nodes function independently?

If the network map goes offline nodes ...READ MORE

Apr 21, 2018 in Blockchain by Perry
 • 17,100 points • 838 views
0 votes
1 answer

Is it that new bitcoins gets created with the every block mined??

Bitcoin mining means validation of a block ...READ MORE

Apr 21, 2018 in Blockchain by Perry
 • 17,100 points • 827 views
+1 vote
1 answer

Hyperledger - How can I use transaction certificates to enforce privacy?

The transaction certificates don't actually address privacy ...READ MORE

Apr 17, 2018 in Blockchain by Perry
 • 17,100 points • 923 views
+1 vote
1 answer

Where does hyperledger stores stores assets and participants??

There are two places where hyperledger stores ...READ MORE

Apr 18, 2018 in Blockchain by Shashank
 • 10,400 points • 823 views
+1 vote
1 answer

How can I achieve a functionality where an action is performed after a payment is received?

See this can be achieved in more ...READ MORE

Apr 21, 2018 in Blockchain by Perry
 • 17,100 points • 695 views
0 votes
1 answer

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 • 792 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 • 1,239 views
0 votes
1 answer

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
 • 17,100 points • 821 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
 • 15,790 points • 1,413 views
0 votes
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
 • 15,790 points • 824 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 • 1,748 views
0 votes
1 answer

Where to store the data of decentralized applications??

Every blockchain is developed in a differnet ...READ MORE

Apr 21, 2018 in Blockchain by Perry
 • 17,100 points • 681 views
0 votes
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
 • 17,100 points • 720 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
 • 17,100 points • 1,657 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
 • 996 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 • 1,589 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
 • 17,100 points • 1,470 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 • 1,169 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 • 1,114 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 • 1,407 views
0 votes
0 answers

What happens to the ethereum mempool transaction of uncle and fork nodes

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

Apr 8, 2018 in Blockchain by Christine
 • 15,790 points • 1,033 views
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