Latest questions in Blockchain

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

Aug 1 in Blockchain by anonymous
• 300 points
66 views
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1 answer

How to write the Bitcoin logo as text?

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

Apr 12 in Blockchain by Aditya
• 7,660 points
146 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 in Blockchain by Soham
• 9,670 points
385 views
0 votes
1 answer

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

 The answer to your question is located here:  function ...READ MORE

Apr 11 in Blockchain by Soham
• 9,670 points
561 views
0 votes
1 answer

blockchain api payment module

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

Apr 11 in Blockchain by Soham
• 9,670 points
98 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 in Blockchain by Soham
• 9,670 points
130 views
0 votes
1 answer

Transaction verification in Blockchain

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

Apr 11 in Blockchain by Soham
• 9,670 points
139 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 in Blockchain by Rahul
• 9,680 points
107 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 in Blockchain by Rahul
• 9,680 points
278 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 in Blockchain by Rahul
• 9,680 points
95 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 in Blockchain by Rahul
• 9,680 points
68 views
0 votes
1 answer

Is Ganache Decentralized?

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

Apr 11 in Blockchain by Rahul
• 9,680 points
127 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 in Blockchain by Rahul
• 9,680 points
306 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 in Blockchain by Rahul
• 9,680 points
63 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 in Blockchain by Rahul
• 9,680 points
120 views
0 votes
1 answer

.Ethereum/BSC blockchain transaction data

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

Apr 11 in Blockchain by Rahul
• 9,680 points
237 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 in Blockchain by Rahul
• 9,680 points
162 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 in Blockchain by Soham
• 9,670 points
1,936 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 in Blockchain by Soham
• 9,670 points
110 views
0 votes
1 answer
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 in Blockchain by Soham
• 9,670 points
133 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 in Blockchain by Soham
• 9,670 points
175 views
0 votes
1 answer

In-App Purchase vs. support developer with bitcoin

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

Apr 12 in Blockchain by Soham
• 9,670 points
67 views
0 votes
1 answer

Generate new Ethereum Wallet in NodeJS

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

Apr 12 in Blockchain by Soham
• 9,670 points
928 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 in Blockchain by Soham
• 9,670 points
87 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 in Blockchain by Soham
• 9,670 points
108 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 in Blockchain by Soham
• 9,670 points
331 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 in Blockchain by Soham
• 9,670 points
544 views
0 votes
1 answer

Bitcoin ticker + fontawesome

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

Apr 12 in Blockchain by Soham
• 9,670 points
87 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 in Blockchain by Soham
• 9,670 points
120 views
0 votes
1 answer

Bitcoin - BitGO - Save all wallet objects into Array of Objects

 After noticing your following code: docs.forEach(function(address) { console.log(address); var ...READ MORE

Apr 12 in Blockchain by Soham
• 9,670 points
103 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 in Blockchain by Soham
• 9,670 points
188 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 in Blockchain by Soham
• 9,670 points
906 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 in Blockchain by Soham
• 9,670 points
471 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 in Blockchain by Rahul
• 9,680 points
807 views
0 votes
1 answer

understanding cryptocoins mining profit calculation

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

Apr 12 in Blockchain by Rahul
• 9,680 points
91 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 in Blockchain by Rahul
• 9,680 points
90 views
0 votes
1 answer

Using zCash through BitcoinJ

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

Apr 12 in Blockchain by Rahul
• 9,680 points
108 views
0 votes
1 answer

IBM Cloud - Blockchain platform | Problem creating MSP definition

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

Apr 11 in Blockchain by Rahul
• 9,680 points
93 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 in Blockchain by Rahul
• 9,680 points
309 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 in Blockchain by Rahul
• 9,680 points
587 views
0 votes
1 answer

Ethereum Smart Contract Blocking

Since transactions from a block are executed ...READ MORE

Apr 12 in Blockchain by Rahul
• 9,680 points
63 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 in Blockchain by Rahul
• 9,680 points
1,186 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 in Blockchain by Rahul
• 9,680 points
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 in Blockchain by Rahul
• 9,680 points
778 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 in Blockchain by Rahul
• 9,680 points
527 views
0 votes
1 answer

Bitcoin blockchain rookie question: how is nonce (the secret number added to each block) generated?

It isn't a secret number but it's ...READ MORE

Apr 7 in Blockchain by Aditya
• 7,660 points
155 views
0 votes
1 answer

What is the "eosio" account re:EOS blockchains?

Its private key is stored at config.ini # ...READ MORE

Apr 7 in Blockchain by Aditya
• 7,660 points
57 views
0 votes
1 answer

Stratum connection for bitcoin pool mining

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

Apr 7 in Blockchain by Aditya
• 7,660 points
350 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 in Blockchain by Aditya
• 7,660 points
301 views