Most viewed questions in Blockchain

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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 • 1,172 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 • 1,167 views
0 votes
1 answer

Solidity, javascript Wrong format: invalid address

The contract lacks initialization, at first. var contract ...READ MORE

Sep 17, 2018 in Blockchain by digger
 • 26,740 points • 1,165 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
 • 15,790 points • 1,165 views
0 votes
1 answer

pybitcointools pushtx TypeError: expected string or buffer

From the looks of it, you need ...READ MORE

Sep 6, 2018 in Blockchain by digger
 • 26,740 points • 1,162 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 • 1,162 views
0 votes
0 answers

How to set chaincode path in Hyperledger Fabric in fabric.sh file

i set the path to chaincode in ...READ MORE

Mar 23, 2019 in Blockchain by Malik
retagged Mar 25, 2019 by Omkar • 1,161 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 • 1,159 views
0 votes
1 answer

How to use std::iterator with basic type uint8_t*?

std::reverse_iterator takes the original iterator type as ...READ MORE

Aug 24, 2018 in Blockchain by slayer
 • 29,350 points • 1,159 views
0 votes
1 answer

How to set miner threads outside geth console?

Yes, you can set the miner threads ...READ MORE

Jan 9, 2019 in Blockchain by Omkar
 • 69,210 points • 1,157 views
0 votes
2 answers

Coinbase button creation and callback

You can use the following code for generating ...READ MORE

Sep 3, 2018 in Blockchain by Nitika
 • 1,155 views
0 votes
1 answer

Error in sending value to an Ethereum Smart Contract.

It is stated in Solidity 4.0 documentation ...READ MORE

Jul 23, 2018 in Blockchain by Perry
 • 17,100 points • 1,154 views
0 votes
1 answer

How to resolve Blockchain DNS using Python Requests?

Look at this example: import requests from random import ...READ MORE

Aug 22, 2018 in Blockchain by Christine
 • 15,790 points • 1,153 views
0 votes
1 answer

Passing hash string with smart contracts

eth.sendTransaction is a go etherum function. There more ...READ MORE

Jul 5, 2018 in Blockchain by slayer
 • 29,350 points • 1,152 views
0 votes
1 answer

How to get the current price of a cryptocurrency on google sheets from coinmarketcap?

Your code does not appear to use ...READ MORE

Apr 12, 2022 in Blockchain by Soham
 • 9,700 points • 1,151 views
0 votes
1 answer

Using Bitcoin's sendmany function with perl

Replace the line  my $action = $api->call('sendmany','',%recipients); with  my ...READ MORE

Sep 11, 2018 in Blockchain by digger
 • 26,740 points • 1,147 views
0 votes
1 answer

Hyperledger Fabric blockchain network from scratch

Try playing with configtx.yaml, crypto-config.yaml and docker-compose ...READ MORE

Apr 11, 2022 in Blockchain by Soham
 • 9,700 points • 1,146 views
0 votes
1 answer

Is the msg.sender address changed while passing to another contract as a parameter?

I tried your contracts in Remix, but ...READ MORE

Oct 10, 2018 in Blockchain by Omkar
 • 69,210 points • 1,146 views
+1 vote
1 answer

Protocols used in a distributed/dlt system for the nodes to establish communication

yes all are over TCP/IP connections secured ...READ MORE

Aug 6, 2018 in Blockchain by aryya
 • 7,450 points • 1,146 views
0 votes
1 answer

How to create an asset on Bigchaindb server using http call

You could start like this: method = POST URL ...READ MORE

Sep 19, 2018 in Blockchain by Christine
 • 15,790 points • 1,143 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 • 1,142 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
 • 9,700 points • 1,139 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 • 1,139 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 • 1,137 views
0 votes
1 answer

How to get TimeStamps in Hyperledger Composer?

Here's an example that works with basic-sample-network network: asset SampleAsset ...READ MORE

Oct 26, 2018 in Blockchain by Omkar
 • 69,210 points • 1,136 views
0 votes
1 answer

truffle migrate Error

testrpc Check your truffle.js config port and ip ...READ MORE

Oct 8, 2018 in Blockchain by Omkar
 • 69,210 points • 1,136 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
 • 1,136 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 • 1,133 views
0 votes
1 answer

How to get data from Google Finance to Google sheets?

You need to have a from and ...READ MORE

Aug 21, 2018 in Blockchain by slayer
 • 29,350 points • 1,132 views
0 votes
1 answer

Hyperledger: How to take DateTime input from user?

There are tow options: 1. You can set ...READ MORE

Nov 12, 2018 in Blockchain by Omkar
 • 69,210 points • 1,125 views
0 votes
1 answer

Blockchain: Installing an earlier version of ethereum using apt-get on

geth does not make the previous version available ...READ MORE

Oct 10, 2018 in Blockchain by Omkar
 • 69,210 points • 1,123 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 • 1,123 views
0 votes
1 answer

Variable declaration problem in truffle console.

The reason it says “undefined” is because ...READ MORE

Jan 27, 2019 in Blockchain by Omkar
 • 69,210 points • 1,120 views
0 votes
1 answer

How to create a new wallet on a blockchain?

Firstly, you need to have a clear ...READ MORE

Apr 4, 2018 in Blockchain by Christine
 • 15,790 points • 1,118 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
 • 69,210 points • 1,114 views
0 votes
1 answer

How read-write sets is used in hyperledger?

You can find the explaination about it ...READ MORE

Jul 3, 2018 in Blockchain by digger
 • 26,740 points • 1,114 views
0 votes
1 answer

What is transientMap in node.js and getTransient in chaincode?

TransientMap: TransientMap  contains data that might be used to ...READ MORE

Jul 13, 2018 in Blockchain by digger
 • 26,740 points • 1,113 views
0 votes
1 answer

Why estimateGas always returns null or zero?

The Web3 API uses error first style callbacks. Your ...READ MORE

Sep 28, 2018 in Blockchain by digger
 • 26,740 points • 1,112 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 • 1,110 views
0 votes
1 answer

How to interact with blockchain from web application?

You can use the Web3.js library to interact ...READ MORE

Jan 11, 2019 in Blockchain by Omkar
 • 69,210 points • 1,109 views
+1 vote
1 answer

How do I create a relationship between list of suppliers and a single order in Hyperledger Composer

Is your transaction actually called 'OrderPlaced' (in ...READ MORE

Mar 28, 2018 in Blockchain by Johnathon
 • 9,090 points • 1,109 views
+1 vote
1 answer

Error while instantiating chaincode

Hey @Vikas!  The error says, dial unix /host/var/run/docker.sock: connect: ...READ MORE

Nov 6, 2018 in Blockchain by Omkar
 • 69,210 points • 1,108 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
 • 69,210 points • 1,108 views
0 votes
1 answer

Ethereum truffle MetaCoin : 'intrinsic gas too low' error

Change the genesis block gasLimit to "gasLimit": "0x2FEFD800", config ...READ MORE

Oct 22, 2018 in Blockchain by Omkar
 • 69,210 points • 1,107 views
+1 vote
1 answer

Hyperledger network roles assigned to peer nodes.

In a hyperledger fabric network transactions are ...READ MORE

Apr 4, 2018 in Blockchain by Christine
 • 15,790 points • 1,104 views
0 votes
1 answer

Why do bitcoin uses UTXO model? What are the advantages UTXO mechanism provides out of the box?

Bitcoin nodes maintain a set of all ...READ MORE

Mar 31, 2022 in Blockchain by Rahul
 • 9,670 points • 1,103 views
0 votes
1 answer

How to plug MSP,Consensus, Ordering service in Hyperledger Fabric?

To plug in MSP: Implement your own MSP ...READ MORE

Jun 27, 2018 in Blockchain by Omkar
 • 69,210 points • 1,102 views
0 votes
1 answer

Blockcypher API code error

This code will work: <?php try ...READ MORE

Aug 23, 2018 in Blockchain by slayer
 • 29,350 points • 1,101 views
0 votes
1 answer

Calling Truffle Commands through a script

Seems like its due to async behavior ...READ MORE

Jan 25, 2019 in Blockchain by Omkar
 • 69,210 points • 1,095 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 • 1,092 views
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