Trending questions in Blockchain

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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 • 293 views
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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 • 282 views
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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 • 278 views
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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 • 294 views
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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 • 362 views
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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 • 235 views
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Testing Ask a question

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

Aug 1, 2022 in Blockchain by anonymous
 • 300 points • 957 views
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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 • 11,117 views
0 votes
1 answer

What's the difference between SHA and AES encryption?

You use SHA functions to take a ...READ MORE

Apr 7, 2022 in Blockchain by Aditya
 • 7,680 points • 6,934 views
0 votes
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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 • 159 views
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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 • 208 views
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1 answer

Know which exchange or wallet is behind a BTC address?

To answer your question, due to each ...READ MORE

Feb 28, 2022 in Blockchain by Soham
 • 9,730 points • 6,789 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 • 4,379 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 • 4,268 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?

This is how I did so: https://www.binance.com/exchange-api/v2/public/asset-service/product/get-products Get this ...READ MORE

Apr 6, 2022 in Blockchain by Aditya
 • 7,680 points • 3,812 views
0 votes
0 answers

What is the difference between blockchain performance and blockchain scalability?

I really don´t get the difference between ...READ MORE

Apr 4, 2022 in Blockchain by Soham
 • 9,730 points • 610 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 • 3,485 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 • 3,435 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 • 143 views
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1 answer

How to get price from bitcoin to USD with api

If I'm not wrong, is this what ...READ MORE

Apr 7, 2022 in Blockchain by Aditya
 • 7,680 points • 3,366 views
0 votes
1 answer

How to visualize real-time data candlestick chart for cryptocurrencies?

Take a look at https://github.com/highfestiva/finplot. Where you can ...READ MORE

Apr 7, 2022 in Blockchain by Rahul
 • 9,690 points • 3,174 views
0 votes
1 answer

Where does Hyperledger Fabric store the database for the Blockchain and where do i can see it and how?

Hyperledger fabric supports LevelDB and CouchDB as ...READ MORE

Apr 7, 2022 in Blockchain by Rahul
 • 9,690 points • 3,069 views
0 votes
1 answer

Key differences between Amazon Managed Blockchain and Quantum Ledger Database (QLDB)?

Put simply, Amazon Managed Blockchain is a ...READ MORE

Mar 24, 2022 in Blockchain by Rahul
 • 9,690 points • 3,466 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 • 2,491 views
+1 vote
0 answers

How to generate bitcoin address from XPUB

How to generate bitcoin addresses from XPUB ...READ MORE

Mar 9, 2022 in Blockchain by Soham
 • 9,730 points • 2,023 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 • 2,370 views
0 votes
1 answer

Stratum connection for bitcoin pool mining

After hours of tinkering around I have ...READ MORE

Apr 7, 2022 in Blockchain by Aditya
 • 7,680 points • 2,388 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 7, 2022 in Blockchain by Rahul
 • 9,690 points
edited Mar 13, 2023 by Gunashree • 2,385 views
0 votes
1 answer

How to request the data of only one cryptocurrency using CoinMarketCap api?

If you want to get the price ...READ MORE

Apr 7, 2022 in Blockchain by Aditya
 • 7,680 points • 2,314 views
0 votes
1 answer

How to use local binance smart chain lightclient to access the blockchain with web3.js?

So the answer is that I was ...READ MORE

Apr 12, 2022 in Blockchain by Rahul
 • 9,690 points • 2,134 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 • 2,105 views
0 votes
1 answer

bitcoin to currency converter and it's reverse in php

Ok, you can get the value by ...READ MORE

Apr 7, 2022 in Blockchain by Aditya
 • 7,680 points • 2,196 views
+1 vote
1 answer

Is it possible to store images on the Ethereum blockchain?

This is possible for your information but, ...READ MORE

Feb 24, 2022 in Blockchain by Aditya
 • 7,680 points • 2,348 views
0 votes
1 answer

yfinance Crypto symbol list

After what I know about, YahooFinance uses ...READ MORE

Mar 24, 2022 in Blockchain by Rahul
 • 9,690 points • 2,925 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
 • 9,690 points • 2,203 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 • 1,915 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 • 1,904 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 • 1,889 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 • 1,860 views
0 votes
1 answer

Crypto algorithm list

The learning here is that cyphers and ...READ MORE

Apr 7, 2022 in Blockchain by Aditya
 • 7,680 points • 1,991 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 • 1,783 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
 • 9,690 points • 1,850 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 • 1,627 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 • 1,461 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 • 1,546 views
0 votes
1 answer

How to get Bitcoin Private Key from an ExtPrivKey using NBitcoin

From what I see in the code ...READ MORE

Apr 7, 2022 in Blockchain by Aditya
 • 7,680 points • 1,679 views
0 votes
1 answer

Best database type to store data that will be used with a blockchain?

Storing just the hash on the blockchain ...READ MORE

Apr 7, 2022 in Blockchain by Aditya
 • 7,680 points • 1,660 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 • 1,499 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 • 1,456 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 • 1,453 views
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