Most viewed questions in Blockchain

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How does the geth ethereum platform automatically connect to the nodes that are in the main network of Ethereum?

When you start with Geth you need ...READ MORE

Mar 28, 2018 in Blockchain by Perry
• 17,100 points
1,074 views
0 votes
1 answer

How is consensus achieved in a Hyperledger Fabric?

The transactions in the network is ordered ...READ MORE

Jun 29, 2018 in Blockchain by Omkar
• 69,210 points
1,073 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
1,072 views
0 votes
1 answer

How is storage space handled in hyperledger peer?

Every transaction is not stored by every ...READ MORE

May 11, 2018 in Blockchain by anonymous
1,071 views
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0 answers

Solidity: How i can return data from hash value ?

I have a solidity contract with two ...READ MORE

Feb 14, 2020 in Blockchain by simone
• 120 points
1,066 views
0 votes
1 answer

How can I import a Bitcoin paper wallet key into a bitcoinlib wallet?

Your code should work in the latest ...READ MORE

Apr 12, 2022 in Blockchain by Soham
• 9,700 points
1,061 views
0 votes
1 answer

How to get historic Bitcoin Price Index using coinbase or any other open source API?

I would recommend you to use the ...READ MORE

Apr 7, 2022 in Blockchain by Rahul
• 9,670 points
1,060 views
0 votes
1 answer

Hyperledger Fabric: How to give full read access to all participants?

To do this, you must first provide ...READ MORE

Nov 9, 2018 in Blockchain by Omkar
• 69,210 points
1,059 views
+2 votes
1 answer

Issue in Initialising the Blockchain

Hi, I am also getting the same ...READ MORE

Sep 17, 2020 in Blockchain by Edureka
• 200 points

reshown Sep 17, 2020 by Gitika 1,057 views
0 votes
1 answer

Hyperledger fabcar: node enrollAdmin.js error

Update the node: npm rebuild and then run ...READ MORE

Oct 26, 2018 in Blockchain by anonymous
1,056 views
0 votes
2 answers

Hyperledger: ./byfn.sh -m up gives error

just follow those steps: docker ps -aq ...READ MORE

Oct 21, 2020 in Blockchain by anonymous
1,055 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
1,055 views
0 votes
1 answer

Security threat principles for Blockchain

These are some steps to prevent/eliminate security threats ...READ MORE

Feb 13, 2019 in Blockchain by Omkar
• 69,210 points
1,051 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
1,047 views
0 votes
0 answers

Is there any API for ether sent transaction in ethereum without using web3.js

I want to do a transaction (sent ...READ MORE

Jun 17, 2019 in Blockchain by vishal tyagi
1,046 views
0 votes
1 answer

truffle migrate Error: “Cannot find module 'truffle-expect'”

Seems like you are missing some modules ...READ MORE

Jan 24, 2019 in Blockchain by Omkar
• 69,210 points
1,046 views
0 votes
1 answer

How to create a private bitcoin network using bitcore?

I think you need to add your ...READ MORE

Sep 6, 2018 in Blockchain by slayer
• 29,350 points
1,046 views
0 votes
1 answer

pubToAddress method from ethereumjs-util throws AssertionError: false == true

This code works fine: var keythereum = require('keythereum'); var ...READ MORE

Oct 8, 2018 in Blockchain by Omkar
• 69,210 points
1,045 views
0 votes
1 answer

In Hyperledger fabric, how does committer validate the transaction?

Endorsing and committing are just two functions ...READ MORE

Jul 3, 2018 in Blockchain by Omkar
• 69,210 points
1,045 views
+1 vote
1 answer

Do we need metamask extension to make transactions on ether?

Actually, we don't need Metamask. To make ...READ MORE

Apr 8, 2018 in Blockchain by Perry
• 17,100 points
1,045 views
0 votes
1 answer

How Bitcoin wallet find unspent transaction output(UTXOs)?

The wallet apps are connected to the ...READ MORE

May 22, 2018 in Blockchain by Shashank
• 10,400 points
1,044 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
1,043 views
+1 vote
0 answers

Can I change the network id in ganache GUI? Is it work for calling the functions in solidity?

Can I change the network id in ...READ MORE

Aug 16, 2019 in Blockchain by anonymous

edited Aug 19, 2019 by Omkar 1,041 views
0 votes
1 answer

How to solve “ERROR: manifest for hyperledger/fabric-couchdb:latest not found” error?

This seems to be a problem with ...READ MORE

Jul 31, 2018 in Blockchain by digger
• 26,740 points
1,041 views
0 votes
1 answer

Blockchain secret sharing

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

Feb 12, 2019 in Blockchain by Omkar
• 69,210 points
1,040 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
1,040 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
1,040 views
0 votes
1 answer

Hyperledger remove asset

Data on a blockchain won't ever be ...READ MORE

Jul 4, 2018 in Blockchain by Christine
• 15,790 points
1,040 views
0 votes
1 answer

How to sync private nodes in geth and testRPC locally?

HI. As much as I know, running ...READ MORE

Jan 16, 2019 in Blockchain by Omkar
• 69,210 points
1,037 views
0 votes
1 answer

Solidity code to change value of name

Try this for setName: function setName(string _name) public ...READ MORE

Jul 30, 2018 in Blockchain by slayer
• 29,350 points
1,036 views
0 votes
1 answer

How can Blockchain be implemented for android development?

Essentially you need to understand what is ...READ MORE

Aug 10, 2018 in Blockchain by Johnathon
• 9,090 points
1,035 views
0 votes
1 answer

How to solve “network state unknown. Review successful transactions manually” error?

There seems to be error in the ...READ MORE

Jul 27, 2018 in Blockchain by digger
• 26,740 points
1,035 views
0 votes
1 answer

Web3 1.0: What does `web3.eth.call(tx)` return for a contract creation?

The returned bytestring is the deployedBytecode of the contract, ...READ MORE

Sep 17, 2018 in Blockchain by digger
• 26,740 points
1,032 views
0 votes
1 answer

'Invalid sender' error after upgrading to geth 1.4.0

Guessing that the JSON RPC stuff changed ...READ MORE

Sep 11, 2018 in Blockchain by Christine
• 15,790 points
1,029 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
1,029 views
0 votes
1 answer

How to send chaincode error to the calling application?

To pass message all the way to ...READ MORE

Jul 6, 2018 in Blockchain by digger
• 26,740 points
1,027 views
0 votes
1 answer

Updating data of struct to save in chaincode.

You can use a code similar to ...READ MORE

Jul 5, 2018 in Blockchain by slayer
• 29,350 points
1,027 views
0 votes
1 answer

Hyperledger Composer: How to write complex queries in Composer?

You can do this using the query ...READ MORE

Nov 20, 2018 in Blockchain by Omkar
• 69,210 points
1,020 views
0 votes
1 answer

Problem while compiling BitcoinJS for browser

The problem iss that you are using browserify wrong ...READ MORE

Aug 30, 2018 in Blockchain by digger
• 26,740 points
1,018 views
0 votes
1 answer

Bitcoin private key: translate from bash to perl

use bignum; # Get arbitrary precision arithmetic # ...READ MORE

Sep 4, 2018 in Blockchain by slayer
• 29,350 points
1,017 views
0 votes
1 answer

client_id in Bitstamp's API

You can use this Ruby code: require 'open-uri' require ...READ MORE

Sep 3, 2018 in Blockchain by digger
• 26,740 points
1,016 views
0 votes
1 answer

XMLHttpRequest is not defined while sending request to blockchain service via C#

use post data in url link and ...READ MORE

Sep 20, 2018 in Blockchain by slayer
• 29,350 points
1,015 views
0 votes
1 answer

Difference between Fabric Composer and Hyperledger Composer?

They are basically the same thing. Fabric ...READ MORE

Aug 9, 2018 in Blockchain by digger
• 26,740 points
1,013 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
1,012 views
0 votes
1 answer

How to explore and analyze the data inside a Hyperledger Blockchain network?

In Hyperledger Composer, you have all the ...READ MORE

Aug 10, 2018 in Blockchain by Christine
• 15,790 points
1,010 views
+1 vote
2 answers

How do I access the api generated by hyperledger composer publicly?

IBM Bluemix is a platform that provides ...READ MORE

Jul 5, 2018 in Blockchain by slayer
• 29,350 points
1,010 views
0 votes
1 answer

Hyperledger: Not able to connect from docker container to validator. curl http://rest-api:8008/blocks

The REST API service is exposed on ...READ MORE

Nov 2, 2018 in Blockchain by Omkar
• 69,210 points
1,007 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
1,006 views
0 votes
1 answer

How to use different network cards for multiple composer rest server users?

You are getting the same network card in ...READ MORE

Dec 6, 2018 in Blockchain by Perry
• 17,100 points
1,004 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
• 15,790 points
1,004 views