Recent questions tagged blockchain

0 votes
1 answer

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

Apr 8, 2018 in Blockchain by Johnathon
 • 9,090 points • 477 views
+1 vote
5 answers

Difference between internal-external, private-public in function

Apr 8, 2018 in Blockchain by Johnathon
 • 9,090 points • 8,546 views
0 votes
1 answer

What are the differences between tendermint and hashgraph?

Apr 8, 2018 in Blockchain by Johnathon
 • 9,090 points • 832 views
+1 vote
7 answers

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

Apr 8, 2018 in Blockchain by Johnathon
 • 9,090 points • 3,306 views
+1 vote
1 answer

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

Apr 8, 2018 in Blockchain by Christine
 • 15,790 points • 918 views
+1 vote
1 answer

What are the differences between coin and token?

Apr 8, 2018 in Blockchain by Christine
 • 15,790 points • 621 views
+1 vote
1 answer

Do we need metamask extension to make transactions on ether?

Apr 8, 2018 in Blockchain by Christine
 • 15,790 points • 1,057 views
+1 vote
1 answer

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

Apr 8, 2018 in Blockchain by Christine
 • 15,790 points • 632 views
0 votes
0 answers

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

Apr 8, 2018 in Blockchain by Christine
 • 15,790 points • 822 views
+1 vote
1 answer

How blockchain nodes switches to another chain?

Apr 8, 2018 in Blockchain by Shashank
 • 10,400 points • 632 views
+1 vote
8 answers

How is Blockchain a linked list?

Apr 7, 2018 in Blockchain by ned_crew
 • 1,610 points • 12,963 views
+1 vote
1 answer

How hyperledger fabric is stored on a PC?

Apr 7, 2018 in Blockchain by ned_crew
 • 1,610 points • 629 views
+1 vote
1 answer

Can we copy a smart contract?

Apr 7, 2018 in Blockchain by nsv999
 • 5,500 points • 1,938 views
+1 vote
1 answer

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

Apr 7, 2018 in Blockchain by nsv999
 • 5,500 points • 503 views
+3 votes
4 answers

How do I add a new node on a Hyperledger network?

Apr 7, 2018 in Blockchain by Johnathon
 • 9,090 points • 4,982 views
+1 vote
1 answer

What are the differences between the hyperledger and Blockchain?

Apr 5, 2018 in Blockchain by Christine
 • 15,790 points • 3,956 views
+1 vote
2 answers

How a merkle tree is generated?

Apr 5, 2018 in Blockchain by Christine
 • 15,790 points • 870 views
+1 vote
1 answer

Hyperledger network roles assigned to peer nodes.

Apr 4, 2018 in Blockchain by Perry
 • 17,100 points • 1,115 views
0 votes
1 answer

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

Apr 4, 2018 in Blockchain by Christine
 • 15,790 points • 607 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?

Apr 4, 2018 in Blockchain by Johnathon
 • 9,090 points • 663 views
0 votes
1 answer

How to create a new wallet on a blockchain?

Apr 4, 2018 in Blockchain by Johnathon
 • 9,090 points • 1,127 views
+1 vote
2 answers

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

Apr 4, 2018 in Blockchain by Atul
 • 10,240 points • 717 views
+1 vote
1 answer

How is a smart contract stored on a Blockchain?

Apr 4, 2018 in Blockchain by nsv999
 • 5,500 points • 905 views
+1 vote
1 answer

How does different blockchains differs on the basis of protocols?

Apr 4, 2018 in Blockchain by Perry
 • 17,100 points • 470 views
+1 vote
1 answer

How is Blockchain used for provenance purposes?

Apr 4, 2018 in Blockchain by Perry
 • 17,100 points • 477 views
+1 vote
2 answers

HyperLedger Fabric Java SDK - Wrinting the ChainCode Sample in Java

Apr 3, 2018 in Blockchain by Christine
 • 15,790 points • 4,021 views
+16 votes
4 answers

Why do only ADMIN users in Hyperledger Fabric have the permission to install query in chaincode?

Apr 3, 2018 in Blockchain by Johnathon
 • 9,090 points • 3,569 views
+2 votes
1 answer

Blockchain declining my API key and I cannot understand why.

Apr 3, 2018 in Blockchain by nsv999
 • 5,500 points • 1,806 views
+1 vote
1 answer

Unable to send payment using API. Please help.

Apr 3, 2018 in Blockchain by Perry
 • 17,100 points • 893 views
+1 vote
2 answers

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

Apr 3, 2018 in Blockchain by Johnathon
 • 9,090 points • 523 views
+1 vote
1 answer

Transaction using Blockchain wallet APi

Apr 3, 2018 in Blockchain by Johnathon
 • 9,090 points • 478 views
+4 votes
4 answers

What are the implementations of IBM blockchain?

Mar 30, 2018 in Blockchain by Johnathon
 • 9,090 points • 831 views
+1 vote
2 answers

How is Blockchain programming languages different than usual programming?

Mar 30, 2018 in Blockchain by Johnathon
 • 9,090 points • 891 views
+4 votes
3 answers

What type of database is blockchain?

Mar 30, 2018 in Blockchain by Johnathon
 • 9,090 points • 938 views
+1 vote
1 answer

What is Ethereum Blockchain? Where is it being used?

Mar 30, 2018 in Blockchain by Johnathon
 • 9,090 points • 805 views
+1 vote
1 answer

Can Blocks be reorganized in the blockchain?

Mar 30, 2018 in Blockchain by Johnathon
 • 9,090 points • 527 views
+1 vote
1 answer

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

Mar 28, 2018 in Blockchain by Christine
 • 15,790 points • 1,087 views
+15 votes
5 answers

How to add Org or peer in Org dynamically in Hyperledger fabric?

Mar 28, 2018 in Blockchain by Perry
 • 17,100 points • 4,553 views
+1 vote
1 answer

Getting issues while Sending signTransaction with web3.js

Mar 28, 2018 in Blockchain by Shashank
 • 10,400 points • 3,353 views
+1 vote
1 answer

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

Mar 28, 2018 in Blockchain by Shashank
 • 10,400 points • 1,116 views
0 votes
1 answer

Connection failed to Ethereum Ropsten Testnet network.

Mar 27, 2018 in Blockchain by Perry
 • 17,100 points • 1,511 views
+1 vote
1 answer

In the Hyperledger Fabric architecture where is the SDK hosted?

Mar 27, 2018 in Blockchain by nsv999
 • 5,500 points • 828 views
+3 votes
2 answers

How to run ethereumjs using Node.JS

Mar 27, 2018 in Blockchain by Gabriel
 • 680 points • 975 views
+1 vote
2 answers

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

Mar 27, 2018 in Blockchain by Gabriel
 • 680 points • 3,254 views
+1 vote
1 answer

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

Mar 27, 2018 in Blockchain by Perry
 • 17,100 points • 966 views
+1 vote
1 answer

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

Mar 27, 2018 in Blockchain by ned_crew
 • 1,610 points • 874 views
+1 vote
2 answers

Challenge while setting up Hyperledger Fabric 1.0 in Ubuntu 16.04

Mar 27, 2018 in Blockchain by Gabriel
 • 680 points • 939 views
+1 vote
1 answer

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

Mar 27, 2018 in Blockchain by Shashank
 • 10,400 points • 2,527 views
+1 vote
1 answer

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

Mar 27, 2018 in Blockchain by Shashank
 • 10,400 points • 516 views
+1 vote
1 answer

How to deploy ethereum smart contracts on a website?

Mar 27, 2018 in Blockchain by Shashank
 • 10,400 points • 1,674 views
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