Most voted questions in Blockchain

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1 answer

Solidity: Code to hide message sender address (msg.sender) when writing on a contract

Hey @Wilson, You can use a smart contract ...READ MORE

Sep 14, 2020 in Blockchain by Rajiv
• 8,870 points
2,399 views
0 votes
0 answers

I got stuck in Blockchain Course. Please Help Me!

Please help me I got stuck in ...READ MORE

Sep 6, 2020 in Blockchain by Arcadius
• 120 points
886 views
0 votes
1 answer

what coding language is this in for ethereum and does this work for trading if setup right?

Hi there, I dont know about ethereum, but ...READ MORE

Jan 4, 2021 in Blockchain by Achuth
• 150 points
2,753 views
0 votes
2 answers

Key Advantages of Using Blockchain in Banking

Immutability: One of the main features of blockchain ...READ MORE

Apr 7, 2021 in Blockchain by Denis

edited Mar 5 1,460 views
0 votes
2 answers

how save data from different account using web3.py to smart contract

Hey, @Amal, It will automatically take the address ...READ MORE

Jul 28, 2020 in Blockchain by Rajiv
• 8,870 points
1,769 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 1,649 views
0 votes
1 answer

Blockchain Basic Questions

Hey, @Nikhil  1. A type of distributed ledger database ...READ MORE

Jun 30, 2020 in Blockchain by Gitika
• 65,730 points
1,489 views
0 votes
1 answer

My account is already an administrator but its giving the an error on denial of permission

Hi, @There, You can try this in your ...READ MORE

Jun 17, 2020 in Blockchain by Gitika
• 65,730 points
2,037 views
0 votes
1 answer

How to create an instance of contract in Truffle console?

Hi, @There, I would suggest you go through ...READ MORE

Jun 17, 2020 in Blockchain by Gitika
• 65,730 points
2,262 views
0 votes
0 answers

Attach two nodes on different machine via private blockchain (Ethereum)

I have seen many blogs regarding ways ...READ MORE

Jun 9, 2020 in Blockchain by Ritvik
• 120 points
1,732 views
0 votes
1 answer

Channel fails to create Hyperledger Fabric

Hi, @Sara, I guess this error is happening ...READ MORE

May 26, 2020 in Blockchain by Gitika
• 65,730 points
2,647 views
0 votes
2 answers

is there any way of getting all data in hyperledger fabric before we start the ledger

Hey, @Harinishree, You can also do one thing, ...READ MORE

Jun 4, 2020 in Blockchain by Gitika
• 65,730 points
1,792 views
0 votes
1 answer
0 votes
0 answers

Any blockchain developer available who could resolve my queries?

I am implementing a project in ethereum. ...READ MORE

May 14, 2020 in Blockchain by Zara
• 140 points
778 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
1,501 views
0 votes
1 answer

If any etherium smart contract source code is not verified

To remove the “unverified” label, the human ...READ MORE

May 12, 2020 in Blockchain by Vikas Blockchained
6,763 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
• 65,730 points
1,768 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
• 65,730 points
1,140 views
0 votes
1 answer

Error: '.' is not recognized as an internal or external command,

Hello @kartik, Edit package.json and remove the ./. Change "start": "./node_modules/nodemon/bin/nodemon.js src/app.js" to "start": "nodemon ...READ MORE

May 5, 2020 in Blockchain by Niroj
• 82,800 points
10,184 views
0 votes
1 answer

Javascript ES6 TypeError: Class constructor Client cannot be invoked without 'new'

Hello @kartik, In package.json you can use targets configuration with @babel/preset-env. ...READ MORE

May 5, 2020 in Blockchain by Niroj
• 82,800 points
23,302 views
0 votes
1 answer

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

I used those commands but the couldn't ...READ MORE

May 5, 2020 in Blockchain by Ratul
• 180 points
1,367 views
0 votes
0 answers

Received error response from peer: message=failed to execute transaction 33b63361e1ce528c334ecf9ef70af2c9136c0fcc444d1ead9d24b5bae8c6dc57

Received this error while submitTransaction executes in ...READ MORE

May 4, 2020 in Blockchain by Edureka
• 120 points
1,075 views
0 votes
1 answer
0 votes
1 answer

Blockchain validation

Hey, @Rohan, Every node in the Bitcoin network ...READ MORE

Apr 20, 2020 in Blockchain by Gitika
• 65,730 points
853 views
0 votes
0 answers

how can i add more than one node to mining blocks ??

i created 6 nodes whit one node ...READ MORE

Apr 12, 2020 in Blockchain by Hicham
• 120 points
815 views
0 votes
1 answer
0 votes
1 answer

What is the previous block hash of block #4390176 in Ethereum Blockchain

0xc253f0917b33b2947b4d9cdb7ad656cc0233ef1781984384284f3a91810a8a36 Th ...READ MORE

Oct 14, 2023 in Blockchain by Rishav Utkarsh

edited Mar 5 10,701 views
0 votes
0 answers
0 votes
1 answer

getting error while starting Hyperleger fabric network on Aws server

Hey, @Nithin, It seems like you have stopped containers ...READ MORE

Mar 30, 2020 in Blockchain by Gitika
• 65,730 points
3,791 views
0 votes
0 answers
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
1,595 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
1,175 views
0 votes
0 answers

Is there any resource for hyper ledger fabric to learn?

Hi, I have searched all the google sites, ...READ MORE

Mar 2, 2020 in Blockchain by anonymous
• 120 points
1,306 views
0 votes
0 answers

Hyperledger Fabric: Average & Max Price FabCar

Hey, I'm using the fabcar project  (https://github.com/IBM/blockchain-application-using-fabric-java-sdk). I ...READ MORE

Mar 1, 2020 in Blockchain by pablobonet
• 120 points
915 views
0 votes
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
1,426 views
0 votes
0 answers
0 votes
0 answers

How to use mutual authentication without CA in hyperledger fabric

I want to use some certificateless mutual ...READ MORE

Jul 29, 2019 in Blockchain by behnaz
• 120 points
834 views
0 votes
1 answer

how to develop healthcare records using DApp on Blockchain?

Hi. As Healthcare will be a private ...READ MORE

Jul 26, 2019 in Blockchain by Esha
3,008 views
0 votes
0 answers

how to Build Bitcoin address and balance database?

How to build Bitcoin Address and Balance ...READ MORE

Jul 25, 2019 in Blockchain by Raj
• 180 points
1,289 views
0 votes
1 answer

In assymetric cryptography how and when the sender will share the public key with the receiver?

Consider this example: Suppose Bob wants to send ...READ MORE

Jul 3, 2019 in Blockchain by Sheila
1,128 views
0 votes
1 answer

How can I become a miner in Blockchain?

You need to download software to become ...READ MORE

Jul 3, 2019 in Blockchain by Raman
3,541 views
0 votes
1 answer

Public and private keys created residing in laptop/mobile while initiating a transaction

You need to provide the receiver's public key ...READ MORE

Jul 3, 2019 in Blockchain by Rachit
885 views
0 votes
0 answers

LIVE PODCAST THREAD** (#2 Are Smart contracts really the Future?)

Hey guys this is the link to ...READ MORE

Jun 28, 2019 in Blockchain by Vardhan
• 13,130 points
1,148 views
0 votes
0 answers

In R3 Corda I don't know to start the web server port in server?

In R3 Corda all the nodes are ...READ MORE

Jun 26, 2019 in Blockchain by anonymous
1,512 views
0 votes
0 answers

Migrations ran out of gas

I have unboxed pet-shop. Then inside the ...READ MORE

Jun 25, 2019 in Blockchain by anonymous
1,374 views
0 votes
0 answers

How do we increase the amount of gas?

Jun 25, 2019 in Blockchain by Neha Agarwal
884 views
0 votes
0 answers
0 votes
0 answers

Network Parameter and additional node info file in R3 corda?

Is that network parameter and additional node ...READ MORE

Jun 21, 2019 in Blockchain by anonymous
886 views