Most viewed questions in Blockchain

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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 • 702 views
0 votes
1 answer

Is IPFS, blockchain a decentralized file system?

HTTP protocol is the most popular on ...READ MORE

May 31, 2018 in Blockchain by Shashank
 • 10,400 points • 701 views
0 votes
1 answer

SHA256 does not give expected result.

You're hashing the string when you're supposed ...READ MORE

Aug 24, 2018 in Blockchain by digger
 • 26,740 points • 700 views
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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 • 698 views
0 votes
1 answer

PROTOBUF_INLINE_NOT_IN_HEADERS

I had the same problem on Ubuntu ...READ MORE

Jun 7, 2018 in Blockchain by Christine
 • 15,790 points • 698 views
0 votes
1 answer

What do we mean by a validating peer?

The term validating peer was used in ...READ MORE

Apr 19, 2018 in Blockchain by Christine
 • 15,790 points • 695 views
0 votes
2 answers

Key Advantages of Using Blockchain in Banking

Hi, @blockchainhq, There are a few more advantages ...READ MORE

Jul 15, 2020 in Blockchain by Gitika
 • 65,930 points • 694 views
0 votes
1 answer

Install testrpc on Linux

You can install testrpc using npm $ npm install ...READ MORE

Feb 28, 2019 in Blockchain by Chandu
 • 694 views
0 votes
1 answer

“make” build ‘EC_GF2m_simple_method’ was not declared in this scope error in centos7

Step 1: I assume that your present ...READ MORE

Sep 17, 2018 in Blockchain by digger
 • 26,740 points • 693 views
0 votes
1 answer

Bitstamp API signature in Ruby

Here is a code that works: require 'open-uri' require ...READ MORE

Aug 28, 2018 in Blockchain by slayer
 • 29,350 points • 693 views
0 votes
1 answer

Solidity, why the used function is placed before the brace "{}" when define a new function?

Hey there! 1. Yes, using the same name ...READ MORE

Apr 4, 2019 in Blockchain by Omkar
 • 69,210 points • 691 views
0 votes
1 answer

Websockets for Block.io API giving an error message

Try something like this: https://jsfiddle.net/bxw3v8c7/ <html> <script src="http://code.jquery.com/jquery-1.11.0.min.js"></script> <script> var btcs = ...READ MORE

Sep 10, 2018 in Blockchain by slayer
 • 29,350 points • 690 views
0 votes
1 answer

What are the differences between tendermint and hashgraph?

Hashgraph uses Superior distributed ledger technology. Hashgraph ...READ MORE

Apr 8, 2018 in Blockchain by Shashank
 • 10,400 points • 690 views
0 votes
1 answer

Problem with installing testrpc using python-pip.

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

Aug 10, 2018 in Blockchain by slayer
 • 29,350 points • 686 views
0 votes
0 answers

hd wallet bip44 in js - how to create an address for a chain other than bitcoin?

I have a small script basically taken ...READ MORE

Mar 2, 2022 in Blockchain by Aditya
 • 7,680 points • 683 views
0 votes
1 answer

program can't start because cudart64_70.dll is missing

You might have missed out installing the ...READ MORE

Jan 29, 2019 in Blockchain by Omkar
 • 69,210 points • 683 views
0 votes
1 answer

Testrpc Error: listen EADDRINUSE :::8545 on Mac

Another process is already using the port ...READ MORE

Sep 26, 2018 in Blockchain by digger
 • 26,740 points • 682 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 • 682 views
0 votes
1 answer

How can I inject and use this javascript library (web3) with JavascriptCore

The web3.js library has dependencies on bignumber.js and crypto-js.js (See dependencies here). You will ...READ MORE

Oct 8, 2018 in Blockchain by Omkar
 • 69,210 points • 681 views
0 votes
1 answer

Is there a way to get the market cap or market cap rank of a coin using the Binance API?

There is no "legal" way to get ...READ MORE

Apr 12, 2022 in Blockchain by Rahul
 • 9,670 points • 677 views
0 votes
1 answer

Can we set a list of discovery nodes in Hyperledger fabric?

New nodes doesn't depend on a single ...READ MORE

Sep 19, 2018 in Blockchain by Christine
 • 15,790 points • 677 views
0 votes
1 answer

Can someone tell me how to solve the Hyperledger playground installation issue?

Hey, @Ratul, I would suggest using this command ...READ MORE

May 13, 2020 in Blockchain by Gitika
 • 65,930 points • 676 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
 • 10,400 points • 676 views
0 votes
1 answer

Hyperledger : Deploying chaincode successful. But, cannot query - says ResourceNotFound

The problem(from logging) is dial unix /var/run/docker.sock: connect: ...READ MORE

Jun 21, 2018 in Blockchain by charlie_brown
 • 7,720 points • 676 views
0 votes
1 answer

How to get amount of bitcoins in php?

I’ve tried this code and it works: <?php function ...READ MORE

Aug 24, 2018 in Blockchain by slayer
 • 29,350 points • 675 views
0 votes
0 answers

Blockchain API to determine transaction confirmations

I am trying to identify whether a ...READ MORE

Mar 1, 2022 in Blockchain by Soham
 • 9,700 points • 674 views
0 votes
1 answer

How to solve Runtime error when querying Hyperledger?

OCI is open container initiative.. The error ...READ MORE

Jul 9, 2018 in Blockchain by slayer
 • 29,350 points • 671 views
0 votes
1 answer

How to get iota balance via api url?

Either run your own node (thus, the localhost reference ...READ MORE

Sep 12, 2018 in Blockchain by digger
 • 26,740 points • 670 views
+1 vote
1 answer

How do i add images in Hyperledger?

You can not directly add an image ...READ MORE

Aug 10, 2018 in Blockchain by Omkar
 • 69,210 points • 670 views
0 votes
0 answers

How do I apply Ethereum Private blockchain or Hyperledger Fabric to Healthcare data management/Drug Traceability?

I just need a lab practice guide ...READ MORE

Jul 3, 2020 in Blockchain by pauloshikoya
 • 120 points
recategorized Jul 3, 2020 by Gitika • 669 views
0 votes
1 answer

Issue in running Corda as a service

There are a few issues with the ...READ MORE

Aug 28, 2018 in Blockchain by Johnathon
 • 9,090 points • 669 views
0 votes
1 answer

Not able to invoke a contract in Ethereum Private chain using geth

Hope this helps: contract mortal { /* ...READ MORE

Oct 22, 2018 in Blockchain by Omkar
 • 69,210 points • 665 views
0 votes
1 answer

Encoding integers in solidity

There are different ways to do this ...READ MORE

Aug 13, 2018 in Blockchain by digger
 • 26,740 points • 664 views
0 votes
0 answers

How I can check where the data is actually stored when we deploy blockchain?

How I can check where the data ...READ MORE

May 14, 2020 in Blockchain by Zara
 • 140 points • 660 views
0 votes
1 answer

Hyperledger Composer Playground: error # Instance org.acme.securebox.Order#1234 missing required field customer

All you have to do is add ...READ MORE

Nov 2, 2018 in Blockchain by Omkar
 • 69,210 points • 659 views
0 votes
1 answer

Cant install python module for python3.6 to use Jsonrpc for altcoin

Try this  VERSION=0.1 python3 setup.py install and there's also ...READ MORE

Sep 7, 2018 in Blockchain by digger
 • 26,740 points • 659 views
0 votes
1 answer

Error while running make command using Fabric 1.0.6

It's a known issue in go 1.9.4: https://github.com/golang/go/issues/23739 While ...READ MORE

Jun 27, 2018 in Blockchain by Perry
 • 17,100 points • 659 views
0 votes
0 answers

Low_s canonical signature for bitcoin transaction

I have a transaction script and trying ...READ MORE

Mar 3, 2020 in Blockchain by anonymous
 • 120 points • 658 views
0 votes
1 answer

Hyperledger Composer: Error: Object with ID 'assetID:0138' in collection with ID 'Asset:org.acme.mynetwork.Sensor'

Remove 'assetID:' from your test string. For example, 'org.acme.mynetwork#assetID:0138' ...READ MORE

Nov 14, 2018 in Blockchain by Omkar
 • 69,210 points • 657 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 • 656 views
0 votes
1 answer

In IBM's Marble demo where are the transactions stored?

When using the Marbles tutorial, there is ...READ MORE

Jun 19, 2018 in Blockchain by Johnathon
 • 9,090 points • 656 views
0 votes
1 answer

Error With Rest Server: HyperLedger

It's a trivial issue mate - you're ...READ MORE

Nov 9, 2018 in Blockchain by Christine
 • 15,790 points • 655 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
 • 29,350 points • 654 views
0 votes
1 answer

Handling connection of new nodes in Decentralized Chatting application.

Libp2p handles discovery and connection of nodes ...READ MORE

Jun 29, 2018 in Blockchain by Omkar
 • 69,210 points • 654 views
+1 vote
2 answers

How a merkle tree is generated?

In a Merkle tree, transaction IDs (txid) ...READ MORE

Apr 5, 2018 in Blockchain by Shashank
 • 10,400 points • 654 views
0 votes
1 answer

Ethereum "truffle server" gives error: TypeError: fsevents is not a constructor

Looks like you have files missing.  Try creating project with: truffle ...READ MORE

Nov 30, 2018 in Blockchain by Omkar
 • 69,210 points • 653 views
0 votes
1 answer

How can I create a blockchain for keeping records?

​You can use an already existing Blockchain. ...READ MORE

Jun 27, 2018 in Blockchain by Christine
 • 15,790 points • 653 views
+1 vote
1 answer

Where is the Open API Specification generated by composer-rest-server stored in a Hyperledger Composer?

By default, the docs are at your ...READ MORE

Mar 26, 2018 in Blockchain by Christine
 • 15,790 points • 653 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 • 651 views
0 votes
1 answer

How do you obtain the transaction uuid after submitting an invoke transaction using the nodejs HFC

The results returned via the 'submitted' event ...READ MORE

Sep 14, 2018 in Blockchain by slayer
 • 29,350 points • 650 views
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