Trending questions in Blockchain

+1 vote
1 answer

How to change ports through which hyperledger composer installs runtime?

To change the port you have to ...READ MORE

Jul 25, 2018 in Blockchain by slayer
 • 29,370 points • 1,229 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 • 1,780 views
0 votes
1 answer

How can I create a feeless ERC-20 token?

You can't have another address pay for ...READ MORE

Aug 7, 2018 in Blockchain by Perry
 • 17,100 points • 715 views
0 votes
1 answer

how to give back each customer a self-defined amount of ether after ICO ends in smart contract?

It's a lot of question. I will ...READ MORE

Aug 1, 2018 in Blockchain by aryya
 • 7,460 points • 948 views
0 votes
1 answer

What is the expiry time of blockchain wallet address?

There is no expiry time for your ...READ MORE

Jul 26, 2018 in Blockchain by slayer
 • 29,370 points • 1,179 views
0 votes
1 answer

Building Hyperledger Fabric Blockchain

To build your own app using Hyperledger ...READ MORE

Aug 9, 2018 in Blockchain by slayer
 • 29,370 points • 569 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
 • 29,370 points • 1,734 views
0 votes
1 answer

Why is there no infinite loop problem in Hyperledger Fabric?

Hyperledger uses a timeout mechanism for chaincode ...READ MORE

Jul 30, 2018 in Blockchain by digger
 • 26,740 points • 1,022 views
0 votes
1 answer

How do I send back ethers to the sender of the tokens in a smart contract?

Whenever a smart contract receives ether via ...READ MORE

May 30, 2018 in Blockchain by Perry
 • 17,100 points • 3,632 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
 • 29,370 points • 1,553 views
0 votes
1 answer

How to create users on hyperledger and how to assign policies to the created users?

First the users need to establish identity ...READ MORE

Jul 10, 2018 in Blockchain by slayer
 • 29,370 points • 1,836 views
0 votes
1 answer

To capture events do we need to create assets using transaction processing functions?

I think you have figured it by ...READ MORE

Aug 10, 2018 in Blockchain by Christine
 • 15,790 points • 510 views
0 votes
1 answer

Cant install quorum blockchain.

You are facing this issue because you ...READ MORE

Aug 1, 2018 in Blockchain by slayer
 • 29,370 points • 871 views
0 votes
1 answer

geth personal.newAccount()\npassword command broke Ethereum CLI

The issue is with your command. It's ...READ MORE

Aug 1, 2018 in Blockchain by Perry
 • 17,100 points • 886 views
0 votes
1 answer

Blockchain PoC Implementation

It depends on your use case like ...READ MORE

Aug 1, 2018 in Blockchain by Christine
 • 15,790 points • 878 views
0 votes
1 answer

Fabric composer integration with Bluemix blockchain service

You can use Composer with the Bluemix ...READ MORE

Aug 3, 2018 in Blockchain by charlie_brown
 • 7,720 points • 749 views
0 votes
1 answer

Can someone explain me how PBFT works?

You can submit your transaction to any ...READ MORE

Jul 31, 2018 in Blockchain by Shashank
 • 10,400 points • 879 views
0 votes
1 answer

How to setup rule in ACL file of Hyperledger Composer to validate against enum?

Use these two ACL rules: ...READ MORE

Jul 19, 2018 in Blockchain by Perry
 • 17,100 points • 1,380 views
0 votes
1 answer

Any security issues in migrating sensitive data in CouchDB to hyperledger composer

Hyperledger Composer and the underlying Hyperledger Fabric ...READ MORE

Aug 3, 2018 in Blockchain by Johnathon
 • 9,090 points • 741 views
0 votes
1 answer

How do i startup the quantum resistant ledger (QRL) node?

There is an open issue in GitHub ...READ MORE

Jul 31, 2018 in Blockchain by Shashank
 • 10,400 points • 866 views
0 votes
1 answer

Error while trying to create dir if missing: mkdir /var/hyperledger: permission denied

The following commands should help: sudo mkdir -p ...READ MORE

Jul 6, 2018 in Blockchain by Christine
 • 15,790 points • 1,941 views
+1 vote
1 answer

Can there be multiple Hyperledger Fabric CA servers in the same blockchain?

Yes, you can run multiple CA servers ...READ MORE

Jun 27, 2018 in Blockchain by Omkar
 • 69,220 points • 2,293 views
0 votes
1 answer

How to send funds using CLI?

You can send funds from one address ...READ MORE

Aug 1, 2018 in Blockchain by digger
 • 26,740 points • 787 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
 • 10,400 points • 1,431 views
0 votes
1 answer

IBM BLUEMIX BLOCKCHAIN SDK-DEMO failing

These types of intermittent issues are usually ...READ MORE

Aug 3, 2018 in Blockchain by charlie_brown
 • 7,720 points • 694 views
0 votes
1 answer

Problem with deploying to a single organization Hyperledger Fabric

It appears to me that  the proposal is ...READ MORE

Aug 1, 2018 in Blockchain by Christine
 • 15,790 points • 787 views
0 votes
1 answer

Hyperledger Composer Error trying to instantiate composer runtime

If this message occurs in instantiating composer ...READ MORE

Jul 31, 2018 in Blockchain by shweta
 • 440 points • 802 views
0 votes
1 answer

Mining on private Ethereum blockchain

You control how miners work on your ...READ MORE

Jul 25, 2018 in Blockchain by Johnathon
 • 9,090 points • 1,044 views
0 votes
1 answer

npm hfc@0.6.2 not properly installing

this is harmless, the hfc module should ...READ MORE

Jul 24, 2018 in Blockchain by charlie_brown
 • 7,720 points • 1,112 views
0 votes
1 answer

How to send bitcoins to multiple recipients at once?

To send bitcoins to multiple recipients, you ...READ MORE

Aug 1, 2018 in Blockchain by slayer
 • 29,370 points • 733 views
0 votes
1 answer

Not able to execute fabcar demo in Hyperledger

This can be solved by deleting directory ...READ MORE

Jul 24, 2018 in Blockchain by charlie_brown
 • 7,720 points • 1,090 views
0 votes
1 answer

How can I change endorsement policies in hyperledger?

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

Jul 19, 2018 in Blockchain by Johnathon
 • 9,090 points • 1,289 views
+4 votes
5 answers

How is Blockchain a distributed database?

Think of blockchain as a relatively slow, ...READ MORE

Mar 26, 2018 in Blockchain by Christine
 • 15,790 points • 1,605 views
0 votes
1 answer

How does this Ethereum Console output mean?

I have divided the output into different ...READ MORE

Aug 1, 2018 in Blockchain by digger
 • 26,740 points • 691 views
0 votes
1 answer

Efficiently sorting Ethereum blockchain.

What you are trying to do is ...READ MORE

Jul 25, 2018 in Blockchain by slayer
 • 29,370 points • 983 views
0 votes
1 answer

How to download the full blocks (with transactions) directly and in parallel from the connected nodes in NodesGroup?

 just got informed, that NBitcoin currently does ...READ MORE

Jul 31, 2018 in Blockchain by Shashank
 • 10,400 points • 721 views
0 votes
1 answer

How to upload or deploy bna file on IBM blockchain service?

The link you provide is for Go ...READ MORE

Jul 27, 2018 in Blockchain by aryya
 • 7,460 points • 917 views
0 votes
1 answer

Send Payment error in Blockchain API

The following code should help: $address = null; try ...READ MORE

Jul 6, 2018 in Blockchain by Perry
 • 17,100 points • 1,792 views
0 votes
1 answer

Hyperledger Fabric V1.0 Application using Java SDK Client for is waiting indefinitely when invoking chaincode

I ran into a similar issue to ...READ MORE

Jul 16, 2018 in Blockchain by Perry
 • 17,100 points • 1,355 views
0 votes
1 answer

Where do we execute Smart Contracts on Hyperledger Fabric?

Hyperledger Fabric has 2 basic types of ...READ MORE

Aug 1, 2018 in Blockchain by Christine
 • 15,790 points • 658 views
0 votes
1 answer

How to monitor Ethereum private network?

geth should be started with --metrics. try the ...READ MORE

Jul 11, 2018 in Blockchain by slayer
 • 29,370 points • 1,560 views
0 votes
1 answer

What is sent to a non-validating notary service when corda transaction is sent?

The transaction is first filtered in the ...READ MORE

Jul 23, 2018 in Blockchain by digger
 • 26,740 points • 1,036 views
0 votes
1 answer

Not able to execute a deployed contract?

The problem is that you are not ...READ MORE

Jul 30, 2018 in Blockchain by digger
 • 26,740 points • 732 views
0 votes
1 answer

Not able to send payments using Blockchain API.

Try the following code. It should help ...READ MORE

Jul 31, 2018 in Blockchain by slayer
 • 29,370 points • 658 views
0 votes
1 answer

Hyperledger fabric ./byfn.sh -m up command hangs during execution

Run the following command: sudo docker stop $(docker ...READ MORE

Jul 30, 2018 in Blockchain by slayer
 • 29,370 points • 725 views
0 votes
1 answer

Looking for a simple Blockchain PoC to implement on a office level

Hyperledger has been collecting some use cases, though not ...READ MORE

Jul 24, 2018 in Blockchain by aryya
 • 7,460 points • 947 views
0 votes
1 answer

In PBFT view change what happens to committed operations after a valid snapshot?

I think that those messages are executed ...READ MORE

Jul 27, 2018 in Blockchain by aryya
 • 7,460 points • 855 views
0 votes
1 answer

Can we custom tokens on Ethereum?

Yes, it is possible. You need to ...READ MORE

Jul 31, 2018 in Blockchain by Mohini
 • 260 points • 665 views
0 votes
1 answer

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 • 1,770 views
0 votes
1 answer

What is the process to Create Cryptocurrency for ICO?

No, you don’t have to issue the ...READ MORE

Jul 25, 2018 in Blockchain by slayer
 • 29,370 points • 900 views
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