Trending questions in Blockchain

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How is consensus reached when there are only two peers in Hyperledger Fabric?

The consensus is achieved in the ordering ...READ MORE

Jul 5, 2018 in Blockchain by digger
 • 26,740 points • 1,240 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
 • 26,740 points • 460 views
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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 • 887 views
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1 answer

How i can use nodejs to watch transactions in bitcoin network?

you can use  const Socket = require('blockchain.info/Socket'); const mySocket ...READ MORE

Jul 9, 2018 in Blockchain by digger
 • 26,740 points • 1,062 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
 • 29,350 points • 716 views
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1 answer

How to use real world/live data in my smart contract?

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

Jul 12, 2018 in Blockchain by digger
 • 26,740 points • 930 views
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1 answer

How to track changes of an object in exonum?

You have to describe each component in ...READ MORE

Jul 23, 2018 in Blockchain by slayer
 • 29,350 points • 451 views
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1 answer

how can I save my nodejs blockchain??

point 1 and 2 are not immune ...READ MORE

Jul 24, 2018 in Blockchain by Shashank
 • 10,400 points • 428 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
 • 29,350 points • 738 views
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1 answer

How to retrieve complete world state of hyperledger?

you can achieve this by iteration process ...READ MORE

Jul 5, 2018 in Blockchain by slayer
 • 29,350 points • 1,210 views
0 votes
1 answer

Error: Error trying to ping. Error: Error trying to query business network. Error: Connect Failed

Run the following commandbefore updating: composer network start ...READ MORE

Jun 28, 2018 in Blockchain by Perry
 • 17,100 points • 1,503 views
+4 votes
3 answers

What type of database is blockchain?

Blockchain is a distributed database. what makes ...READ MORE

Mar 30, 2018 in Blockchain by Christine
 • 15,790 points • 950 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
 • 10,400 points • 668 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
 • 17,100 points • 411 views
0 votes
1 answer

Can we create a hyperledger fabric with peers from different platforms?

Yes, it is possible. Peers from different ...READ MORE

Jul 24, 2018 in Blockchain by slayer
 • 29,350 points • 359 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
 • 17,100 points • 702 views
0 votes
1 answer

Transaction Id in Bitcoin Blockchain

The TransactionId comes from sending the coin. ...READ MORE

Jul 13, 2018 in Blockchain by Christine
 • 15,790 points • 826 views
0 votes
1 answer

Passing hash string with smart contracts

eth.sendTransaction is a go etherum function. There more ...READ MORE

Jul 5, 2018 in Blockchain by slayer
 • 29,350 points • 1,169 views
0 votes
1 answer

Getting error when i execute ./byfn.sh -m up command.

The error is caused because you're trying ...READ MORE

Jul 12, 2018 in Blockchain by slayer
 • 29,350 points • 865 views
0 votes
1 answer

What if I change Chaincode state in invokeChaincode?

The chaincode state is not changed when ...READ MORE

Jul 13, 2018 in Blockchain by slayer
 • 29,350 points • 817 views
0 votes
1 answer

Geth 'sendTransaction' not working

When transactions are put in a loop, ...READ MORE

Jul 3, 2018 in Blockchain by Omkar
 • 69,230 points • 1,219 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 aryya
 • 7,450 points • 533 views
0 votes
1 answer

how to learn writing java code for Hyperledger Fabric?

You can learning writing java codes for ...READ MORE

Jul 10, 2018 in Blockchain by slayer
 • 29,350 points • 916 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 • 566 views
0 votes
1 answer

How to upload data from PC or sensors to blockchain?

you can do it by writing a ...READ MORE

Jul 9, 2018 in Blockchain by slayer
 • 29,350 points • 950 views
0 votes
1 answer

How to transact custom token instead of ethers using JSON rpc?

First create your custom token. Then develop ...READ MORE

Jul 10, 2018 in Blockchain by digger
 • 26,740 points • 908 views
0 votes
1 answer

What exactly is BigChainDB?

Technically, BigChainDB internally uses RethinkDB as a ...READ MORE

Jul 11, 2018 in Blockchain by Shashank
 • 10,400 points • 859 views
+3 votes
2 answers

How to run ethereumjs using Node.JS

You need to install testrpc globally on ...READ MORE

Mar 27, 2018 in Blockchain by ned_crew
 • 1,610 points • 1,000 views
+1 vote
2 answers

How do I access the api generated by hyperledger composer publicly?

IBM Bluemix is a platform that provides ...READ MORE

Jul 5, 2018 in Blockchain by slayer
 • 29,350 points • 1,062 views
0 votes
1 answer

How can I create multiple connection profiles and multiple nodes in hyperledger composer?

 If you want to learn more about ...READ MORE

Jul 11, 2018 in Blockchain by Shashank
 • 10,400 points • 836 views
0 votes
1 answer

How to send chaincode error to the calling application?

To pass message all the way to ...READ MORE

Jul 6, 2018 in Blockchain by digger
 • 26,740 points • 1,056 views
0 votes
1 answer

How to write a program to get details of ERC tokens?

You can use Javascript with the Metamask ...READ MORE

Jul 13, 2018 in Blockchain by slayer
 • 29,350 points • 752 views
0 votes
1 answer

Çannot implement web3.eth.subscribe on Web3 version 1.0.0-beta.27

As the error suggests, pub/sub is not ...READ MORE

Jun 19, 2018 in Blockchain by Perry
 • 17,100 points
edited Jun 19, 2018 by Perry • 1,778 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 20, 2018 in Blockchain by aryya
 • 7,450 points • 463 views
0 votes
1 answer

How to create tokens in smart contracts from node.js?

Any modification to the Ethereum Blockchain will ...READ MORE

Jun 27, 2018 in Blockchain by Shashank
 • 10,400 points • 1,456 views
0 votes
1 answer

Blockchain Python Syntax Error

Look here:  print('Block #{} has been added to ...READ MORE

Jul 13, 2018 in Blockchain by Christine
 • 15,790 points • 729 views
0 votes
1 answer

Include real world data in smart contract

What you are looking for is an ...READ MORE

Jul 11, 2018 in Blockchain by Shashank
 • 10,400 points • 814 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 aryya
 • 7,450 points • 557 views
0 votes
1 answer

How to update data in Corda?

Yes, in corda you can store data ...READ MORE

Jul 11, 2018 in Blockchain by digger
 • 26,740 points • 810 views
0 votes
1 answer

How to solve Corda Node Startup Exception?

The error says "port may be in ...READ MORE

Jul 13, 2018 in Blockchain by digger
 • 26,740 points • 720 views
0 votes
1 answer

How are unique public address generated in bitcoin?

In brief, the public addresses are generated ...READ MORE

Jul 16, 2018 in Blockchain by slayer
 • 29,350 points • 584 views
0 votes
1 answer

Updating data of struct to save in chaincode.

You can use a code similar to ...READ MORE

Jul 5, 2018 in Blockchain by slayer
 • 29,350 points • 1,060 views
0 votes
1 answer

How read-write sets is used in hyperledger?

You can find the explaination about it ...READ MORE

Jul 3, 2018 in Blockchain by digger
 • 26,740 points • 1,137 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 • 521 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
 • 26,740 points • 528 views
0 votes
1 answer

What is the peer node start in hyperledger?

Nodes are the fundamental element of the ...READ MORE

Jul 9, 2018 in Blockchain by digger
 • 26,740 points • 865 views
0 votes
1 answer

Hyperledger remove asset

Data on a blockchain won't ever be ...READ MORE

Jul 4, 2018 in Blockchain by Christine
 • 15,790 points • 1,111 views
0 votes
1 answer

How to limit execution of smart contract only to my dapp?

You can use modifiers to do it ...READ MORE

Jul 17, 2018 in Blockchain by digger
 • 26,740 points • 507 views
0 votes
1 answer

How to add peers on a running Hyperledger Fabric?

You can not use configtxlator tool for ...READ MORE

Jul 10, 2018 in Blockchain by slayer
 • 29,350 points • 808 views
0 votes
2 answers

How to set permissions within a blockchain?

There are blockchains that allow defining permissions. Hyperledger ...READ MORE

Aug 28, 2018 in Blockchain by Michael
 • 908 views
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