Most viewed questions in Blockchain

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How can i integrate Omnet++ with ethereum ?? or is there any other simulator which can do this??

You can use Hive Validator. Using this, you ...READ MORE

Apr 9, 2019 in Blockchain by Omkar
 • 69,180 points • 1,765 views
0 votes
1 answer

How can I deploy a hyperledger business network using docker-compose?

If you want to use Composer, be ...READ MORE

Oct 4, 2018 in Blockchain by Perry
 • 17,100 points • 1,765 views
0 votes
1 answer

How read-write sets is used in hyperledger?

In Hyperledger, read-write sets are used during ...READ MORE

Jul 3, 2018 in Blockchain by digger
 • 26,740 points • 1,763 views
0 votes
1 answer

Getting the length of public array variable (getter)

The calling contract will need the ABI ...READ MORE

Sep 24, 2018 in Blockchain by digger
 • 26,740 points • 1,756 views
0 votes
1 answer

Do the orderers see the transaction data in Hyperledger Fabric?

No, the orderers do not see the ...READ MORE

Feb 4, 2019 in Blockchain by Omkar
 • 69,180 points • 1,752 views
+1 vote
1 answer

What are the differences between blockchain programming and our traditional programming languages?

On higher level comparison, there are quite ...READ MORE

Apr 18, 2018 in Blockchain by Shashank
 • 10,400 points • 1,752 views
+1 vote
1 answer

How to decide on a nonce while developing a blockchain?

A nonce should be decided on the ...READ MORE

Apr 10, 2018 in Blockchain by Shashank
 • 10,400 points • 1,751 views
0 votes
1 answer

How many people are mining bitcoins all over the world?

No, it's not possible to find out ...READ MORE

Jun 26, 2018 in Blockchain by Omkar
 • 69,180 points • 1,748 views
0 votes
1 answer

Error in Chaincodes not getting picked up by ./startFabric.sh

After changing chaincode in fabric-samples/chaincode/fabcar/go/fabcar.go (this is ...READ MORE

Jul 31, 2018 in Blockchain by Shashank
 • 10,400 points • 1,746 views
0 votes
1 answer

Ethereum truffle server command not working

Try this command to create project: truffle init ...READ MORE

Nov 30, 2018 in Blockchain by Omkar
 • 69,180 points • 1,745 views
0 votes
1 answer

Bitcoin Core on external SSD in OS X

 In order to do so, assuming you ...READ MORE

Feb 28, 2022 in Blockchain by Soham
 • 9,730 points • 1,743 views
+2 votes
3 answers

Blockchain and HyperLedger difference

Hey, you got it right! Blockchain is ...READ MORE

Sep 7, 2018 in Blockchain by Omkar
 • 69,180 points • 1,740 views
0 votes
1 answer

Hyperledger Fabric: Cannot update chaincode

First, stop and delete all the containers: docker ...READ MORE

Oct 31, 2018 in Blockchain by Omkar
 • 69,180 points • 1,739 views
+1 vote
2 answers

How to get airdropped tokens to Ethereum wallet?

You also can use Frewallet This wallet is ...READ MORE

Dec 20, 2019 in Blockchain by anonymous
 • 160 points • 1,738 views
0 votes
1 answer

How can I retrieve to and from address in transaction directly from blockchain?

The spending conditions, i.e., who is able ...READ MORE

Jul 11, 2018 in Blockchain by Shashank
 • 10,400 points • 1,731 views
0 votes
1 answer

Nethereum C# Unit Test GetTransactionCount

You have already made the test async ...READ MORE

Sep 26, 2018 in Blockchain by slayer
 • 29,370 points • 1,729 views
0 votes
1 answer

How to check Bitcoin Wallet ?

This can be done using Extended Public ...READ MORE

Jul 13, 2018 in Blockchain by Perry
 • 17,100 points • 1,729 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 • 1,727 views
0 votes
1 answer

Can one contract own tokens of another contract?

Yes, contracts can own tokens. The transaction you ...READ MORE

Oct 17, 2018 in Blockchain by Christine
 • 15,750 points • 1,726 views
0 votes
1 answer

Not receiving any data from the BitStamp API.

I saw a code online that was ...READ MORE

Aug 21, 2018 in Blockchain by digger
 • 26,740 points • 1,725 views
0 votes
1 answer

How to connect javascript to solidity/ethereum?

You can connect javascript to solidity by ...READ MORE

Jul 11, 2018 in Blockchain by digger
 • 26,740 points • 1,725 views
0 votes
1 answer

How to store picture(s) in a hyperledger blockchain channel

You can hold images as encrypted characters ...READ MORE

Jun 16, 2018 in Blockchain by charlie_brown
 • 7,720 points • 1,725 views
0 votes
1 answer

Hyperledger composer: Not able to issue identities from a Business network.

To specify your own affiliation you need ...READ MORE

Nov 6, 2018 in Blockchain by Omkar
 • 69,180 points • 1,724 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
 • 69,180 points • 1,724 views
0 votes
2 answers

Why is getTransactionReceipt() returning None (NoneType object)?

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

Sep 11, 2020 in Blockchain by pythoncourse
 • 140 points • 1,723 views
0 votes
1 answer

How to solve “Error: Expected a Resource or Concept”?

There are few errors in code. I ...READ MORE

Jul 31, 2018 in Blockchain by slayer
 • 29,370 points • 1,722 views
+15 votes
2 answers

What are the various blockchain smart contracts platforms?

While Ethereum is the most popular platform ...READ MORE

Mar 27, 2018 in Blockchain by Johnathon
 • 9,090 points • 1,719 views
0 votes
0 answers

How I can connect multiple physical machine with hyperledger fabric??

I want to connect my 3 computers ...READ MORE

Mar 12, 2020 in Blockchain by Md
 • 120 points • 1,716 views
0 votes
1 answer

Solidity: How can I return a list of user-defined function?

You can do it with something like ...READ MORE

Sep 26, 2018 in Blockchain by digger
 • 26,740 points • 1,715 views
–1 vote
1 answer

How to list ethereum accounts in RPC?

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

Jan 10, 2019 in Blockchain by Omkar
 • 69,180 points • 1,714 views
+1 vote
1 answer

while I am hitting servies in node js in hyperledger fabric 2.0 I am getting issues like Invalid common connection profile due to missing configuration data

Hey, @Harinishree, With error "Invalid network configuration due ...READ MORE

May 14, 2020 in Blockchain by Gitika
 • 65,730 points • 1,712 views
0 votes
1 answer

Does each DApp has its own separate Blockchain? Or can we develop multiple DApps on a single Blockchain platform?

A DApp is a decentralized Application. This ...READ MORE

Jun 11, 2018 in Blockchain by Christine
 • 15,750 points • 1,711 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
 • 29,370 points • 1,710 views
0 votes
1 answer

How to define the path to hyperledger-fabric chaincode?

You can find that in docker-compose files ...READ MORE

Oct 4, 2018 in Blockchain by Perry
 • 17,100 points • 1,709 views
0 votes
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 • 1,706 views
0 votes
1 answer

Zip attachment in Corda: How to read zip file using InputStream?

You can not directly read the content ...READ MORE

Jul 25, 2018 in Blockchain by digger
 • 26,740 points • 1,704 views
0 votes
1 answer

blockchain.info api_code is missing

Check the blockchain api. it should be $Blockchain ...READ MORE

Aug 22, 2018 in Blockchain by slayer
 • 29,370 points • 1,702 views
+1 vote
1 answer

How is ordering of transactions done in a block in hyperledger?

Consensus is the key concept for validating ...READ MORE

May 3, 2018 in Blockchain by Christine
 • 15,750 points • 1,702 views
+1 vote
1 answer

Is it possible to store blockchain in a sql or no-sql database?

Currently, following are the options to store ...READ MORE

Apr 21, 2018 in Blockchain by Perry
 • 17,100 points
edited Aug 9, 2018 by Omkar • 1,701 views
0 votes
1 answer

Solidity and Web.js for Ethereum blockchain data

Your code is not right. I have ...READ MORE

Jul 30, 2018 in Blockchain by digger
 • 26,740 points • 1,696 views
0 votes
1 answer

Kraken Api, withdrawal issue “Invalid asset”

asset need to be specified as lowercase, so you ...READ MORE

Aug 29, 2018 in Blockchain by Sumit
 • 1,695 views
0 votes
1 answer

Bitcoin pool mining using stratum

JSON string shouldn't have any spaces. So ...READ MORE

Aug 20, 2018 in Blockchain by digger
 • 26,740 points • 1,695 views
0 votes
1 answer

UnhandledPromiseRejectionWarning: Insufficient funds error in Ethereum: NodeJS web3

sendSignedTransaction returns a promiEvent onto which you can chain then and catch: web3.eth.sendSignedTransaction('0x' + ...READ MORE

Oct 15, 2018 in Blockchain by Omkar
 • 69,180 points • 1,693 views
0 votes
1 answer

IPFS transaction cost as a decentralized service

IPFS itself does not have transaction cost, ...READ MORE

Aug 3, 2018 in Blockchain by Perry
 • 17,100 points • 1,692 views
0 votes
1 answer

Truffle deployer is not working

If you have deployed it before, then ...READ MORE

Jan 29, 2019 in Blockchain by Omkar
 • 69,180 points • 1,691 views
0 votes
1 answer

Blockchain secret sharing

Blockchain has many methods to provide data ...READ MORE

Feb 12, 2019 in Blockchain by Omkar
 • 69,180 points • 1,684 views
0 votes
1 answer

Corda: uploading a file, attach and download

Hey, i found an example that i ...READ MORE

Sep 19, 2018 in Blockchain by digger
 • 26,740 points • 1,682 views
0 votes
1 answer

How to get the number of tokens in the Bitcoin network?

This information can easily be calculated by ...READ MORE

Aug 31, 2018 in Blockchain by Christine
 • 15,750 points • 1,682 views
0 votes
1 answer

Hyperledger Fabric: Cant create channel on peer

Add host entries to your /etc/hosts should resolve your ...READ MORE

Oct 26, 2018 in Blockchain by Omkar
 • 69,180 points • 1,680 views
0 votes
1 answer

How to get Bitcoin Private Key from an ExtPrivKey using NBitcoin

From what I see in the code ...READ MORE

Apr 7, 2022 in Blockchain by Aditya
 • 7,680 points • 1,679 views
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