Trending questions in Blockchain

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Not able to deploy smart contract on testrpc.

I attached to geth using the following ...READ MORE

Jul 23, 2018 in Blockchain by digger
• 26,550 points
44 views
0 votes
1 answer

How to return data on execution of invoke function?

You can do this using a response ...READ MORE

Jul 23, 2018 in Blockchain by digger
• 26,550 points
39 views
0 votes
1 answer

How proof work prevents rebuilding of blockchain?

POS has the same idea as POW. ...READ MORE

Jul 23, 2018 in Blockchain by Shashank
• 10,350 points
22 views
0 votes
1 answer

Do we require a specific condition when working with indices on solidity?

Your code is written correctly. require is intended to ...READ MORE

Jul 23, 2018 in Blockchain by Perry
• 17,020 points
33 views
+2 votes
1 answer

What are the wallet path credentials for Web3j?

Follow the below steps: Go to the private ...READ MORE

Aug 2, 2018 in Blockchain by Omkar
• 67,660 points
300 views
0 votes
1 answer

How to display State Information to a list of participants dynamically?

The if condition mentioned below will never ...READ MORE

Jul 23, 2018 in Blockchain by Omkar
• 67,660 points
77 views
0 votes
1 answer

How can I change endorsement policies in hyperledger?

Well the good news is that it ...READ MORE

Jul 18, 2018 in Blockchain by Johnathon
• 9,080 points
213 views
0 votes
1 answer

How to perform a simple 1-to-1 Bitcoin Transaction with Bitcore?

What is the argument utxos int the ...READ MORE

Jul 20, 2018 in Blockchain by charlie_brown
• 7,720 points
115 views
0 votes
1 answer

How should I set my mac to install "hyperledger composer playground locally" ?

Install the pre-reqs https://hyperledger.github.io/composer/ins ...READ MORE

Jul 20, 2018 in Blockchain by Christine
• 15,790 points
98 views
0 votes
1 answer

Hyperledger Composer error in transaction

Check that you have declare the function ...READ MORE

Jul 20, 2018 in Blockchain by shweta
• 440 points
95 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
• 67,660 points
2,045 views
0 votes
1 answer

What are the differences between chain and state database in hyperledger fabric?

There are two place which "store" data ...READ MORE

Jul 11, 2018 in Blockchain by Shashank
• 10,350 points
478 views
0 votes
1 answer

How do nodes communicate with each other in hyperledger?

First let me tell you that there ...READ MORE

Jul 17, 2018 in Blockchain by slayer
• 29,170 points
219 views
0 votes
1 answer

Hyperledger-Fabric Endorsement Policy: What are Members and Admins?

The goal of endorsement policy to set ...READ MORE

Jul 13, 2018 in Blockchain by Christine
• 15,790 points
367 views
0 votes
1 answer

Hyperledger: How to test endorsement policy for the business network in multiple organizations?

Give the proposal responses you are receiving ...READ MORE

Jul 13, 2018 in Blockchain by Perry
• 17,020 points
361 views
0 votes
1 answer

How to solve "Failed to deserialize creator identity error"?

It seems like the problem is caused ...READ MORE

Jul 13, 2018 in Blockchain by slayer
• 29,170 points
368 views
0 votes
1 answer

What is the purpose of Blockchain Technology?

The purpose of Blockchain technology is to ...READ MORE

Jul 23, 2018 in Blockchain by Omkar
• 67,660 points
46 views
0 votes
1 answer

Getting error while trying to submit a transaction on hyperledger playground

not enough information as to how you ...READ MORE

Jul 17, 2018 in Blockchain by Shashank
• 10,350 points
181 views
0 votes
1 answer

How can I build a hexadecimal block if I have all the needed information?

Here you have some articles about bitcoin ...READ MORE

Jul 20, 2018 in Blockchain by Christine
• 15,790 points
34 views
0 votes
1 answer

How to interact with blockchain using Java web app?

You can interact with the blockchain using ...READ MORE

Jul 16, 2018 in Blockchain by digger
• 26,550 points
221 views
0 votes
1 answer

Can someone help me conceptualizing blockchain for supply chain demo?

I think you should take a step ...READ MORE

Jul 17, 2018 in Blockchain by Shashank
• 10,350 points
174 views
0 votes
1 answer

Ethereum Studio: Can't find Sandbox

The GitHub project site says that the image is ...READ MORE

Jul 20, 2018 in Blockchain by Christine
• 15,790 points
35 views
0 votes
1 answer

Where is the hyperlewdger fabric endorsement policy stored?

I don't know exactly where is the ...READ MORE

Jul 2, 2018 in Blockchain by charlie_brown
• 7,720 points
799 views
0 votes
1 answer

How to solve EACCES:permission denied error in Hyperledger Composer?

It seems like there is no required ...READ MORE

Jul 11, 2018 in Blockchain by digger
• 26,550 points
426 views
0 votes
1 answer

How to retrieve data from an Ethereum Block?

To get transaction details like Block Hash ...READ MORE

Jul 19, 2018 in Blockchain by Perry
• 17,020 points
52 views
0 votes
1 answer

How does the consensus happen in Saas based blockchain application?

I will be maintaining the database at ...READ MORE

Jul 19, 2018 in Blockchain by ariaholic
• 7,340 points
35 views
+4 votes
2 answers

How do I create a new block in Hyperledger Fabric?

This link might help you: https://github.com/hyperledger/fabric-sample ...READ MORE

Oct 11, 2018 in Blockchain by Sahu
515 views
0 votes
1 answer

Which is the best decentralized storage apps?

IPFS is a protocol for a distributed ...READ MORE

Jul 19, 2018 in Blockchain by ariaholic
• 7,340 points
39 views
0 votes
1 answer

Error while running curl command in Docker Quickstart Terminal

You can get the new version of ...READ MORE

Jul 12, 2018 in Blockchain by slayer
• 29,170 points
341 views
0 votes
1 answer

How to extract h160 address of bitcoin blockchain?

You can extract the data using the ...READ MORE

Jul 16, 2018 in Blockchain by digger
• 26,550 points
164 views
0 votes
1 answer

Why hyperledger REST server has PUT method?

Actually, with the PUT method, you don't ...READ MORE

Jul 19, 2018 in Blockchain by ariaholic
• 7,340 points
26 views
0 votes
1 answer

How would I run SpringBoot with the Java-SDK of Hyperledger Fabric java daemon?

I am not familiar with SpringBoot, but ...READ MORE

Jul 3, 2018 in Blockchain by ariaholic
• 7,340 points
699 views
0 votes
1 answer

Unable to request channel creation using Rest Api

I'd recommend taking a look at the ordering ...READ MORE

Jul 16, 2018 in Blockchain by Perry
• 17,020 points
138 views
0 votes
1 answer

How do I get the total amount sent to an address?

If you are using web3JS you can ...READ MORE

Jul 18, 2018 in Blockchain by Johnathon
• 9,080 points
35 views
0 votes
1 answer

How to solve "error trying install composer runtime" in Hyperledger composer?

I think the docker-compose tool is not ...READ MORE

Jul 17, 2018 in Blockchain by slayer
• 29,170 points
94 views
0 votes
1 answer

How to change Endorsement policies

Well the good news is that it ...READ MORE

Jul 18, 2018 in Blockchain by charlie_brown
• 7,720 points
39 views
0 votes
1 answer

How to use Blockchain to store government records?

As I understood you are planning to ...READ MORE

Jul 18, 2018 in Blockchain by charlie_brown
• 7,720 points
28 views
0 votes
1 answer

How to generate new address for blockchain wallet?

You can use the following to generate ...READ MORE

Jul 16, 2018 in Blockchain by digger
• 26,550 points
112 views
0 votes
1 answer

How do I start mining on my private chain?

You could try deleting the datadir/.etash and ...READ MORE

Jul 13, 2018 in Blockchain by Christine
• 15,790 points
218 views
0 votes
1 answer

Is it possible to claim Bitcoin Cash from an exchange that does not support it?

You can't claim BCH without knowing private ...READ MORE

Jul 17, 2018 in Blockchain by ariaholic
• 7,340 points
46 views
0 votes
1 answer

What is transientMap in node.js and getTransient in chaincode?

TransientMap: TransientMap  contains data that might be used to ...READ MORE

Jul 13, 2018 in Blockchain by digger
• 26,550 points
217 views
0 votes
1 answer

Can we store encrypted data into transaction?

Ethereum can store whatever bytes you want, ...READ MORE

Jul 17, 2018 in Blockchain by Christine
• 15,790 points
30 views
0 votes
1 answer

How to build a non-payment application using Ethereum blockchain?

I hope the following link is helpful ...READ MORE

Jul 17, 2018 in Blockchain by digger
• 26,550 points
42 views
0 votes
1 answer

How to get peer admin's certificate and key on Bluemix?

Follow the steps mentioned below: Create connection profile ~/.composer-connection-profiles/bmx-stage1-kubes/connection.json {  "name": ...READ MORE

Jul 16, 2018 in Blockchain by slayer
• 29,170 points
82 views
0 votes
1 answer

how to get modification history of asset?

You can use GetHistoryForKey() API as shown ...READ MORE

Jul 9, 2018 in Blockchain by digger
• 26,550 points
382 views
0 votes
1 answer

REQUEST_TIMEOUT error in Hyperledger Fabric, Linux

My docker version was 1.7. And its ...READ MORE

Jul 6, 2018 in Blockchain by Christine
• 15,790 points
511 views
0 votes
1 answer

How to create a Genesis Block in a Private Network?

{     "nonce": "0x0000000000000042",     "difficulty": "0x000000100",     "alloc": {     },     "mixhash": "0x0000000000000000000000000000000000000000000000000000000000000000",     "coinbase": "0x0000000000000000000000000000000000000000",     "timestamp": "0x00",     "parentHash": ...READ MORE

Jul 12, 2018 in Blockchain by digger
• 26,550 points
253 views
0 votes
1 answer

How do I calculate number of full nodes in bitcoins/altcoins?

You can not calculate/estimate the total number ...READ MORE

Jul 17, 2018 in Blockchain by Shashank
• 10,350 points
34 views
0 votes
1 answer

How blockchain hides it's HTML source?

When you click View Source, you see ...READ MORE

Jul 17, 2018 in Blockchain by Shashank
• 10,350 points
34 views
0 votes
1 answer

What is CA (Authority) in Hyperledger Fabric?

Hyperledger fabric includes a modular Certificate Authority ...READ MORE

Jul 12, 2018 in Blockchain by shweta
• 440 points
246 views