Most voted questions in Blockchain

+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 • 2,142 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
 • 2,064 views
0 votes
0 answers

solidity struct is not generated in java wrapper code

struct itemDetails{ uint256 itemId; string itemName; uint256 itemVal; } mapping(address => itemDetails[]) ...READ MORE

Oct 27, 2023 in Blockchain by sanap
edited Mar 5 • 284 views
0 votes
0 answers

please can you send me a valid genesis.json file in my email adress : victordievi@gmail.com

when i run geth --datadir ./data init ...READ MORE

May 27, 2023 in Blockchain by victor
edited Mar 5 • 275 views
0 votes
0 answers

How can I code my own cryptocurrency mining software?

I've been researching for months. But I ...READ MORE

Feb 17, 2023 in Blockchain by Turkuaz
edited Mar 5 • 272 views
0 votes
0 answers

i am having an error called identifier not found or not unique.

i have called a function for owner ...READ MORE

Dec 19, 2022 in Blockchain by virat
edited Mar 4 • 279 views
0 votes
0 answers

can anyone recommend me blockchain course? or any other learning material that is beginner friendly

can anyone recommend me blockchain course? or ...READ MORE

Nov 16, 2022 in Blockchain by Akash

edited Mar 4 • 355 views
0 votes
0 answers

How to get output list in solidity funct,i have a struct of Drug,and a table named drugs of Drug:i need to get a list/table of drugs having same name

I try this but it doesn't work! ...READ MORE

Sep 25, 2022 in Blockchain by IMEN
edited Mar 4 • 228 views
0 votes
0 answers

Mapping structure before copying values

Below is the code ``` pragma solidity ^0.4.18; contract Courses ...READ MORE

Aug 22, 2022 in Blockchain by Brijesh
 • 120 points
edited Mar 4 • 152 views
0 votes
0 answers

Error while creating channel in hyperledger-fabric

$ ./network.sh createChannel Using docker and docker-compose Creating channel ...READ MORE

Aug 1, 2022 in Blockchain by Shaik
edited Mar 4 • 201 views
0 votes
0 answers

Testing Ask a question

This category houses questions pertaining to various ...READ MORE

Aug 1, 2022 in Blockchain by anonymous
 • 300 points • 939 views
0 votes
0 answers

Do I need to learn programming languages like python and c to learn block chain examples in ethereum go ?

When I was learning blockchain from edureka ...READ MORE

Jun 25, 2022 in Blockchain by anonymous
edited Mar 4 • 135 views
0 votes
1 answer

How to write the Bitcoin logo as text?

Create a string in strings.xml like the ...READ MORE

Apr 12, 2022 in Blockchain by Aditya
 • 7,680 points • 1,438 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
 • 9,730 points • 1,870 views
0 votes
1 answer

PHP - Validate Multisig Bitcoin Wallet Address (with Leading 2 or 3)

 The answer to your question is given ...READ MORE

Apr 11, 2022 in Blockchain by Soham
 • 9,730 points • 2,472 views
0 votes
1 answer

blockchain api payment module

No curly braces after your if statement. ...READ MORE

Apr 11, 2022 in Blockchain by Soham
 • 9,730 points • 1,284 views
0 votes
1 answer

Error using Santiment sanpy library for cryptocurrency data analysis

This is a great start, but I ...READ MORE

Apr 11, 2022 in Blockchain by Soham
 • 9,730 points • 1,419 views
0 votes
1 answer

Transaction verification in Blockchain

Assuming You are asking about UTXO transaction ...READ MORE

Apr 11, 2022 in Blockchain by Soham
 • 9,730 points • 1,522 views
0 votes
1 answer

Naives Bayes Classifier for bag of vectorized sentences

The error is basically the [X_train] which ...READ MORE

Apr 11, 2022 in Blockchain by Rahul
 • 9,690 points • 1,288 views
0 votes
1 answer

safeTransferFrom does not transfer etherium to the target. ERC-721

I changed my contract buy function like ...READ MORE

Apr 11, 2022 in Blockchain by Rahul
 • 9,690 points • 1,443 views
0 votes
1 answer

Is there a pricing calculator for azure-blockchain-workbench or azure baas using hyperledger fabric?

The cost of Blockchain Workbench is an ...READ MORE

Apr 11, 2022 in Blockchain by Rahul
 • 9,690 points • 1,184 views
0 votes
1 answer

What is blockchain and Ethereum? Where is it used?

A blockchain is an immutable, sequential chain of ...READ MORE

Apr 11, 2022 in Blockchain by Rahul
 • 9,690 points • 824 views
0 votes
1 answer

Is Ganache Decentralized?

1. Can blockchain be implemented without cryptocurrency? Yes. ...READ MORE

Apr 11, 2022 in Blockchain by Rahul
 • 9,690 points • 1,197 views
0 votes
1 answer

Unable to send Ripple (Cryptocurrency Coin - XRP) to Wallet

The "Secret Key" or privateKey is for ...READ MORE

Apr 11, 2022 in Blockchain by Rahul
 • 9,690 points • 1,843 views
0 votes
1 answer

How would calculate the exchange rate of Bitcoin/GBP?

You simply divide 1 by the resulting ...READ MORE

Apr 11, 2022 in Blockchain by Rahul
 • 9,690 points • 906 views
0 votes
1 answer

Where does Hyperledger fabric store the public key and private key of the user?

It signs the transaction with its private key ...READ MORE

Apr 11, 2022 in Blockchain by Rahul
 • 9,690 points • 1,379 views
0 votes
1 answer

.Ethereum/BSC blockchain transaction data

The "Tokens Transferred" information comes from event ...READ MORE

Apr 11, 2022 in Blockchain by Rahul
 • 9,690 points • 1,484 views
0 votes
1 answer

Why do we not use Istanbul Byzantine Fault Tolerance (IBFT) in Public Blockchains?

The use of the IBFT consensus involves ...READ MORE

Apr 11, 2022 in Blockchain by Rahul
 • 9,690 points • 1,105 views
0 votes
1 answer

Generate Ethereum addresses in HD Wallet using public key only (bitcoinj/web3j)

Like Bitcoin, Ethereum uses secp256k1. Ethereum addresses ...READ MORE

Apr 12, 2022 in Blockchain by Soham
 • 9,730 points • 4,248 views
0 votes
1 answer

What's the difference between distributed hashtable technology and the bitcoin blockchain?

A Distributed Hash Table is simply a key-value ...READ MORE

Apr 12, 2022 in Blockchain by Soham
 • 9,730 points • 1,360 views
0 votes
1 answer

REQUEST_TIMEOUT when instantiating my mart contarct on IBM blockchain Hyperledger Fabric network IBM. VS CODE is used for Hyperledger Fabric network

 If you're seeing a REQUEST_TIMEOUT error it's ...READ MORE

Apr 12, 2022 in Blockchain by Soham
 • 9,730 points • 1,424 views
0 votes
1 answer

Private ethereum blockchain mining on a Raspberry Pi - is it possible?

There are some pretty good guides out ...READ MORE

Apr 12, 2022 in Blockchain by Soham
 • 9,730 points • 1,610 views
0 votes
1 answer

Does timestamp also change with nonce to calculate block hash in blockchain? How hash is calculated?

I was unable to locate the exact ...READ MORE

Apr 12, 2022 in Blockchain by Soham
 • 9,730 points • 1,762 views
0 votes
1 answer

In-App Purchase vs. support developer with bitcoin

Not only do I think this will ...READ MORE

Apr 12, 2022 in Blockchain by Soham
 • 9,730 points • 886 views
0 votes
1 answer

Generate new Ethereum Wallet in NodeJS

 In its simplest form, the Ethereum wallet ...READ MORE

Apr 12, 2022 in Blockchain by Soham
 • 9,730 points • 2,343 views
0 votes
1 answer

Why is Proof of Work necessary in Blockchain?

You are missing the double-spending problem. If ...READ MORE

Apr 12, 2022 in Blockchain by Soham
 • 9,730 points • 899 views
0 votes
1 answer

Kotlin Convert Bitcoin value into Satoshi Value

java.lang.NumberFormatException: For input string: "45,586" This means ...READ MORE

Apr 12, 2022 in Blockchain by Soham
 • 9,730 points • 1,282 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
 • 9,730 points • 1,875 views
0 votes
1 answer

Coinbase API v2 Getting Historic Price for Multiple Days

Any reason you aren't using coinbase pro? The ...READ MORE

Apr 12, 2022 in Blockchain by Soham
 • 9,730 points • 3,418 views
0 votes
1 answer

Bitcoin ticker + fontawesome

Font Awesome arrow up is displayed like ...READ MORE

Apr 12, 2022 in Blockchain by Soham
 • 9,730 points • 1,174 views
0 votes
1 answer

CryptoCurrency NODE.js Web3 Ethereum - Can't connect to TESTRPC

Your connection is working. To return an ...READ MORE

Apr 12, 2022 in Blockchain by Soham
 • 9,730 points • 1,054 views
0 votes
1 answer

How to swap an Ethereum ERC-20 and Neo NEP5 token with a smart contract?

Each blockchain is its own separated administration. ...READ MORE

Apr 12, 2022 in Blockchain by Soham
 • 9,730 points • 1,127 views
0 votes
1 answer

Is it possible to set up bots for BitCoin faucet websites?

I managed to create a bot for ...READ MORE

Apr 12, 2022 in Blockchain by Soham
 • 9,730 points • 4,324 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
 • 9,730 points • 1,897 views
0 votes
1 answer

How to get sender bitcoin address from transaction ID?

 You can use any scripting language with ...READ MORE

Apr 12, 2022 in Blockchain by Rahul
 • 9,690 points • 3,464 views
0 votes
1 answer

understanding cryptocoins mining profit calculation

 The problem is that the miner you ...READ MORE

Apr 12, 2022 in Blockchain by Rahul
 • 9,690 points • 856 views
0 votes
1 answer

what is the meaning of the term 'airdrops' in cryptocurrency?

Cryptocurrency vocabulary is difficult to pin down. ...READ MORE

Apr 12, 2022 in Blockchain by Rahul
 • 9,690 points • 1,187 views
0 votes
1 answer

Using zCash through BitcoinJ

Your code isn't accounting for the format ...READ MORE

Apr 12, 2022 in Blockchain by Rahul
 • 9,690 points • 951 views
0 votes
1 answer

IBM Cloud - Blockchain platform | Problem creating MSP definition

I have found a solution by doing ...READ MORE

Apr 11, 2022 in Blockchain by Rahul
 • 9,690 points • 844 views
0 votes
1 answer

Is there a way to get the market cap or market cap rank of a coin using the Binance API?

There is no "legal" way to get ...READ MORE

Apr 12, 2022 in Blockchain by Rahul
 • 9,690 points • 2,076 views
Page:

Most popular tags

"PMP®","PMI®", "PMI-ACP®" and "PMBOK®" are registered marks of the Project Management Institute, Inc. MongoDB®, Mongo and the leaf logo are the registered trademarks of MongoDB, Inc.