Latest questions in Blockchain

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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 • 2,228 views
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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 • 1,604 views
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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 • 2,951 views
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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 • 2,775 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, 2022 in Blockchain by Aditya
 • 7,680 points • 1,261 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, 2022 in Blockchain by Aditya
 • 7,680 points • 517 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 • 2,098 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 • 6,573 views
0 votes
1 answer

Can I perform transaction from different server - Blockchain

You need to understand the differences between ...READ MORE

Apr 7, 2022 in Blockchain by Aditya
 • 7,680 points • 627 views
0 votes
1 answer

blockchain consensus 51% vs number of nodes validation

51% is an attack vector for Proof ...READ MORE

Apr 7, 2022 in Blockchain by Aditya
 • 7,680 points • 1,284 views
0 votes
1 answer

How to resolve blockchain dns using Python Requests

BDNS is offline and I don't know if ...READ MORE

Apr 7, 2022 in Blockchain by Aditya
 • 7,680 points • 1,185 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 • 1,470 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 • 2,002 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 • 2,090 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 • 1,466 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 • 1,757 views
0 votes
1 answer

How to store cryptocurrency balance without causing floating point errors in ruby/rails

 I suggest storing the values as integers. ...READ MORE

Apr 7, 2022 in Blockchain by Aditya
 • 7,680 points • 801 views
0 votes
1 answer

Where actual blockchain state data stored : in memory , in file or in database?

Bitcoin nodes keep the raw block data ...READ MORE

Apr 7, 2022 in Blockchain by Aditya
 • 7,680 points • 832 views
0 votes
1 answer

Blockchain POC on DApps in Java

You could be a little more specific ...READ MORE

Apr 7, 2022 in Blockchain by Aditya
 • 7,680 points • 809 views
0 votes
1 answer

Can not add peer in local ethereum blockchain

You have port 30305 running in your ...READ MORE

Apr 7, 2022 in Blockchain by Aditya
 • 7,680 points • 810 views
0 votes
1 answer

Cant use get_chart function in blockchain python client

As you said, get_chart is defined in ...READ MORE

Apr 7, 2022 in Blockchain by Aditya
 • 7,680 points • 683 views
0 votes
1 answer

Protect photo ownership using blockchain

Photo ownership can be protected using Blockchain ...READ MORE

Apr 7, 2022 in Blockchain by Aditya
 • 7,680 points • 1,119 views
0 votes
1 answer

PHP. Bitcoin to Ukrainian Hrivna price ticker

I would suggest, that instead of dividing ...READ MORE

Apr 7, 2022 in Blockchain by Aditya
 • 7,680 points • 726 views
0 votes
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 • 3,143 views
0 votes
1 answer

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

Basically, Bitcoin nodes maintain a set of ...READ MORE

Apr 7, 2022 in Blockchain by Aditya
 • 7,680 points • 1,047 views
0 votes
1 answer

Is it possible to get wallet balance passing the wallet address on any cryptocurrency?

For Ethereum the API is called web3.eth.getBalance. There ...READ MORE

Apr 7, 2022 in Blockchain by Aditya
 • 7,680 points • 1,250 views
0 votes
0 answers

how does bitcoin prevent double-spending?

can someone help me create a Pseudocode ...READ MORE

Apr 5, 2022 in Blockchain by Soham
 • 9,730 points
edited Mar 4 • 72 views
0 votes
1 answer

Currency Conversion using PHP

Please find below an example of converting ...READ MORE

Apr 6, 2022 in Blockchain by Soham
 • 9,730 points • 1,191 views
0 votes
0 answers

BITCOIN payments, OP_RETURN parameter

I want to automate BITCOIN payments and ...READ MORE

Apr 4, 2022 in Blockchain by Rahul
 • 9,690 points • 486 views
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0 answers

Can third party send an ERC20 token transaction to the Ethereum blockchain?

I want to create a smart contract ...READ MORE

Apr 4, 2022 in Blockchain by Rahul
 • 9,690 points • 1,006 views
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0 answers

How do I do experiments of blockchain consensus algorithms

I'm writing a paper on the blockchain ...READ MORE

Apr 4, 2022 in Blockchain by Rahul
 • 9,690 points • 684 views
0 votes
1 answer

Get bitcoin historical data

Actually, you CAN get the whole Bitcoin ...READ MORE

Apr 6, 2022 in Blockchain by Aditya
 • 7,680 points • 1,007 views
0 votes
0 answers

Does the crypto wallet "Exodus" reveal your IP Address?

I've read that "SPV Wallets," also called ...READ MORE

Apr 4, 2022 in Blockchain by Rahul
 • 9,690 points • 872 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 • 3,496 views
0 votes
1 answer

How to get bitcoins for testing?

In order to see how Bitcoin works, ...READ MORE

Apr 6, 2022 in Blockchain by Aditya
 • 7,680 points • 806 views
0 votes
1 answer

Candlestick chart on bitcoinwisdom

In searching bitcoinwisdom's forums, I found a ...READ MORE

Apr 6, 2022 in Blockchain by Aditya
 • 7,680 points • 886 views
0 votes
1 answer

BITCOIN TO USD API

You can use blockchain.info API: URL: https://blockchain.info/ticker Response: { "USD" : ...READ MORE

Apr 6, 2022 in Blockchain by Aditya
 • 7,680 points • 774 views
0 votes
0 answers

Is Blockchain a single linked list?

When seen as a datatype, is Blockchain ...READ MORE

Apr 4, 2022 in Blockchain by Rahul
 • 9,690 points • 590 views
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0 answers

Azure Blockchain , Cannot read property 'uri' of undefined

I am starting with Azure Blockchain. When ...READ MORE

Apr 4, 2022 in Blockchain by Rahul
 • 9,690 points • 528 views
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0 answers

What is the difference between Amazon managed Blockchain and Amazon Blockchain Templates?

I am a beginner in Blockchain and ...READ MORE

Apr 4, 2022 in Blockchain by Rahul
 • 9,690 points • 712 views
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0 answers

Node.js blockchain bitcoin api

So I want to use this: (taken ...READ MORE

Apr 4, 2022 in Blockchain by Rahul
 • 9,690 points • 633 views
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Are all Blockchain array implementations incorrect?

I found many Blockchain implementations on the ...READ MORE

Apr 4, 2022 in Blockchain by Rahul
 • 9,690 points • 493 views
0 votes
0 answers

Blockchain platform in C

I am trying to understand available blockchain ...READ MORE

Apr 4, 2022 in Blockchain by Rahul
 • 9,690 points • 532 views
0 votes
1 answer

Blockchain decentralised database on rails

You have to handle this with a ...READ MORE

Apr 6, 2022 in Blockchain by Aditya
 • 7,680 points • 767 views
0 votes
1 answer

Permissions within a blockchain?

To answer your question, try looking up ...READ MORE

Apr 6, 2022 in Blockchain by Aditya
 • 7,680 points • 545 views
0 votes
1 answer

What did permissioned blockchain solve?

To answer your question, the permissioned networks ...READ MORE

Apr 6, 2022 in Blockchain by Aditya
 • 7,680 points • 523 views
0 votes
1 answer

Storing Data on Blockchain

Yes, this is correct that if you ...READ MORE

Apr 6, 2022 in Blockchain by Aditya
 • 7,680 points • 909 views
0 votes
1 answer

NodeJs blockchain on private ethereum

From what I understand, your JS code ...READ MORE

Apr 6, 2022 in Blockchain by Aditya
 • 7,680 points • 906 views
0 votes
0 answers

Is Blockchain a distributed database?

I have noticed that most of the ...READ MORE

Apr 4, 2022 in Blockchain by Soham
 • 9,730 points • 634 views
0 votes
1 answer

Transaction in a blockchain

I assume you should take it as ...READ MORE

Apr 6, 2022 in Blockchain by Aditya
 • 7,680 points • 549 views
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