Most viewed questions in Blockchain

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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
1,280 views
0 votes
1 answer

Solidity geth: Error encountered during contract execution [Bad instruction]

recipes is a dynamic storage array. You need ...READ MORE

Oct 15, 2018 in Blockchain by Omkar
• 69,230 points
1,278 views
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1 answer

Is there a way to send funds from a specific bitcoin address in a wallet?

I'll answer my own question, It was unbelievably ...READ MORE

Sep 3, 2018 in Blockchain by Perry
• 17,100 points
1,278 views
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1 answer

How to generate events in Hyperledger Fabric?

You can generate events using a method ...READ MORE

Jul 26, 2018 in Blockchain by digger
• 26,740 points
1,277 views
–1 vote
1 answer

User Identity management on Ethereum Blockchain

User Identity management can be done via ERC725 ...READ MORE

Dec 28, 2018 in Blockchain by Omkar
• 69,230 points
1,276 views
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1 answer

How to round a number down to 8 decimal places if its over 8 decimal places in Javascript

Try it in this way: function nrOfDecimals(number) { ...READ MORE

Sep 12, 2018 in Blockchain by slayer
• 29,350 points
1,274 views
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React Native to make requests to bitcoin wallet

I found an API that could help ...READ MORE

Aug 23, 2018 in Blockchain by digger
• 26,740 points
1,274 views
+1 vote
3 answers

Is it possible to store data about arbitrary objects on the blockchain using smart contracts?

Basically you implement requested logic on by ...READ MORE

Aug 30, 2018 in Blockchain by Artem
1,273 views
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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
• 69,230 points
1,269 views
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1 answer

How to develop peer to peer network in hyperledger fabric?

There are two ways you can do ...READ MORE

Jul 10, 2018 in Blockchain by digger
• 26,740 points
1,269 views
0 votes
1 answer

How to install chaincode in new Org in hyperledger fabric?

To do this, first enter you cli ...READ MORE

Nov 22, 2018 in Blockchain by Omkar
• 69,230 points
1,268 views
0 votes
1 answer

Korbit api with python http.client

http.client.HTTPSConnection accepts hostname, not a url. conn = http.client.HTTPSConnection("api.korbit.co.kr", ...READ MORE

Aug 28, 2018 in Blockchain by digger
• 26,740 points
1,268 views
0 votes
1 answer

how can i convert stub.GetTxTimestamp() to type string?

You can not directly convert the timestamp ...READ MORE

Jul 5, 2018 in Blockchain by digger
• 26,740 points
1,267 views
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1 answer

Where is the data stored in blockchain?

The smart contract is just the business ...READ MORE

Jun 29, 2018 in Blockchain by slayer
• 29,350 points
1,266 views
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1 answer

What are off-chain transactions?

An off-chain transaction is the movement of ...READ MORE

Feb 13, 2019 in Blockchain by Omkar
• 69,230 points
1,265 views
0 votes
1 answer

Hyperledger Composer: Error: Chaincode already installed - Composer-playground

You get this error because composer-playground saves ...READ MORE

Nov 12, 2018 in Blockchain by Omkar
• 69,230 points
1,263 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
• 29,350 points
1,261 views
0 votes
1 answer

How to solve “Package 'ethereum' has no installation candidate” error?

This error might have occurred because your ...READ MORE

Aug 8, 2018 in Blockchain by slayer
• 29,350 points
1,260 views
0 votes
1 answer

AWS multichain network, "Couldn't connect to the seed node" error

The error says "please check multichaind is ...READ MORE

Jul 9, 2018 in Blockchain by slayer
• 29,350 points
1,258 views
0 votes
1 answer

How to set up hyperledger fabric on 2 different PCs?

I would recommend that you look at ...READ MORE

Aug 2, 2018 in Blockchain by aryya
• 7,450 points
1,254 views
+1 vote
1 answer

What happened on deploy, invoke and query in Hyperledger chaincode?

1. Deploy: During Deploy the chaincode is written onto ...READ MORE

Apr 26, 2018 in Blockchain by Christine
• 15,790 points
1,250 views
+1 vote
1 answer

How blockchain node behaves upon receiving a new block when previous block wasn't acquired?

A node will ask for block number ...READ MORE

Mar 26, 2018 in Blockchain by Perry
• 17,100 points
1,249 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
1,247 views
0 votes
1 answer

How to read file from subprocess.open in python?

you call: out, err = p.communicate() READ MORE

Aug 24, 2018 in Blockchain by digger
• 26,740 points
1,243 views
0 votes
1 answer

How to get current block number in parity?

You can get the latest block number ...READ MORE

Jun 8, 2018 in Blockchain by Christine
• 15,790 points
1,241 views
0 votes
1 answer

Hyperledger Composer: How to Update Existing Assets?

get on an asset registry returns a ...READ MORE

Nov 5, 2018 in Blockchain by Omkar
• 69,230 points
1,239 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
• 69,230 points
1,239 views
0 votes
1 answer

Command "network" is not defined. in hyperledger composer

For composer network to work, you must ...READ MORE

Nov 21, 2018 in Blockchain by Omkar
• 69,230 points
1,238 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
• 69,230 points
1,238 views
0 votes
1 answer

Error: t: Instance org.acme.seller.Car#HW7722 missing required field oldOwner

This error occurs if you have added a ...READ MORE

Jun 21, 2018 in Blockchain by Christine
• 15,790 points

edited Jun 21, 2018 by Christine 1,238 views
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1 answer

What happens to the blockchain currency when nodes gets disconnected?

After the resync of the network, the ...READ MORE

May 22, 2018 in Blockchain by Johnathon
• 9,090 points
1,235 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
1,233 views
0 votes
1 answer

Hyperledger Fabric ./byfn -m up not bringing up

Seems like you have not installed docker-compose. ...READ MORE

Nov 5, 2018 in Blockchain by Omkar
• 69,230 points
1,231 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
1,231 views
0 votes
1 answer

Bruteforcing OpenSSL to decrypt bitcoin backup.

You need to add -passin pass:XXX options, where XXX ...READ MORE

Aug 24, 2018 in Blockchain by digger
• 26,740 points
1,230 views
0 votes
1 answer

How to deploy Hyperledger-fabric V2.0 with SDK using kubernetes

Hi, @There, It involves several steps, most of ...READ MORE

Dec 18, 2020 in Blockchain by Gitika
• 65,910 points
1,229 views
0 votes
1 answer

Bitcoin: error parsing json

Make these changes in your code: json="'{" to ...READ MORE

Aug 22, 2018 in Blockchain by digger
• 26,740 points
1,229 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
1,225 views
0 votes
1 answer

Poloniex C# API - get trades

Outputting the Trade will just show you ...READ MORE

Sep 25, 2018 in Blockchain by digger
• 26,740 points
1,223 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
1,218 views
0 votes
1 answer

How to send events in Hyperledger Composer?

You define the event in your .cto ...READ MORE

Aug 25, 2018 in Blockchain by Perry
• 17,100 points
1,217 views
0 votes
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
1,217 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
1,216 views
0 votes
1 answer

How to set up Hyperledger Fabric v0.6 network without docker?

Hyperledger Fabric v0.6 does not provide any ...READ MORE

Jul 9, 2018 in Blockchain by slayer
• 29,350 points
1,216 views
+1 vote
0 answers

Hyperledger fabric : unable to create channel on raspberry pi 4 with Raft ordering service

Hello, I am trying to setup an hyperledger ...READ MORE

May 13, 2020 in Blockchain by Manon
• 130 points
1,214 views
0 votes
1 answer

Can I upload or attach pdf to the blockchain payload?

Attaching the pdf directly to the blockchain ...READ MORE

Jul 25, 2018 in Blockchain by aryya
• 7,450 points
1,214 views
0 votes
1 answer

How to get a list of Coinbase CryptoCurrency Coins

The following code: import requests ...READ MORE

Apr 8, 2022 in Blockchain by Rahul
• 9,670 points
1,210 views
0 votes
1 answer

Curl Script Usage in Ethereum Blockcypher's API

You should store and keep the private ...READ MORE

May 28, 2018 in Blockchain by Christine
• 15,790 points
1,209 views
0 votes
1 answer

hyperledger composer network is not starting

Hey, @Sudip, First thing you need to start ...READ MORE

May 13, 2020 in Blockchain by Gitika
• 65,910 points
1,208 views