Trending questions in Blockchain

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 • 603 views
+1 vote
1 answer

Error attempting installing ethermint

I faced the same issue. Here's where ...READ MORE

Aug 2, 2018 in Blockchain by Christine
 • 15,790 points • 598 views
0 votes
1 answer

How to use a chaincode that's not on github?

There are two options: If you are not ...READ MORE

Aug 3, 2018 in Blockchain by charlie_brown
 • 7,720 points • 582 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
 • 7,450 points • 671 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 • 1,475 views
0 votes
1 answer

How many blocks does Wavesnet Blockchain have?

This question is old, and you obviously ...READ MORE

Aug 7, 2018 in Blockchain by Perry
 • 17,100 points • 425 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
 • 29,350 points • 312 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
 • 29,350 points • 1,607 views
0 votes
1 answer

How is running the asset_management.go different from running a simple chaincode like chaincode_example02.go

The chaincode workflow you mentioned is correct, ...READ MORE

Aug 3, 2018 in Blockchain by charlie_brown
 • 7,720 points • 566 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 • 1,199 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 • 3,371 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 • 692 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 • 663 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 • 677 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 • 724 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 • 525 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 • 629 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
 • 29,350 points • 1,426 views
0 votes
1 answer

How to call external data using smart contracts?

Smart contracts can not directly call external ...READ MORE

Jul 16, 2018 in Blockchain by slayer
 • 29,350 points • 1,292 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 • 510 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 • 640 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
 • 69,210 points • 2,093 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 • 882 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 • 915 views
+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
 • 29,350 points • 801 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 • 493 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
 • 29,350 points • 772 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 • 469 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 • 1,587 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 • 849 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
 • 29,350 points • 462 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 • 1,579 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
 • 7,450 points • 698 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
 • 29,350 points • 559 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 • 1,025 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 • 809 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
 • 29,350 points • 1,340 views
0 votes
1 answer

Where do we execute Smart Contracts on Hyperledger Fabric?

Take a look here: http://hyperledger-fabric.readthedocs.io/en/latest/txflow.html Hyperledger Fabric has 2 ...READ MORE

Aug 1, 2018 in Blockchain by Christine
 • 15,790 points • 434 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
 • 29,350 points • 447 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 • 455 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
 • 29,350 points • 702 views
0 votes
1 answer

how to modify smart contract template for self defined functionality

TL;DR; This code simply defines the start ...READ MORE

Aug 1, 2018 in Blockchain by aryya
 • 7,450 points • 398 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 • 414 views
0 votes
1 answer

How does the consensus mechanism work for a SaaS based blockchain?

Blockchain doesn't have the client-server architecture that ...READ MORE

Aug 1, 2018 in Blockchain by Christine
 • 15,790 points • 396 views
0 votes
1 answer

How can I integrate ethereum wallet on my site??

you can use web3 js API to ...READ MORE

May 29, 2018 in Blockchain by Perry
 • 17,100 points • 3,146 views
0 votes
1 answer

I want to use Blockchain receive API without exchange rate

You are not using receive API you are using Exchange ...READ MORE

Aug 1, 2018 in Blockchain by Perry
 • 17,100 points • 402 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 • 419 views
0 votes
1 answer

How to modify h2 port in Corda for IntelliJ?

When you use IntelliJ, the nodes are ...READ MORE

Jul 27, 2018 in Blockchain by slayer
 • 29,350 points • 591 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 • 1,064 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 • 477 views
Page:

Most popular tags

"PMP®","PMI®", "PMI-ACP®" and "PMBOK®" are registered marks of the Project Management Institute, Inc. MongoDB®, Mongo and the leaf logo are the registered trademarks of MongoDB, Inc.