Most viewed questions in Blockchain

0 votes
1 answer

Problem in QRL (Quantum Resistant Node) startup

There is an open issue in GitHub ...READ MORE

Aug 28, 2018 in Blockchain by Johnathon
 • 9,090 points • 541 views
0 votes
1 answer

Error in generating network sample.

I resolved this issue by downloading the ...READ MORE

Jul 26, 2018 in Blockchain by Perry
 • 17,100 points • 541 views
0 votes
1 answer

How can I sync geth and testrpc private nodes locally?

node running on testrpc cannot be connected ...READ MORE

May 17, 2018 in Blockchain by Shashank
 • 10,400 points • 541 views
0 votes
1 answer

Bitaps.com Error Code 10

Mistake in word qouta. Need quota $rules = [ ...READ MORE

Sep 7, 2018 in Blockchain by slayer
 • 29,350 points • 540 views
0 votes
1 answer

How can I simulate private bitcoin network with random peer discovery?

You can model the whatever network you ...READ MORE

May 29, 2018 in Blockchain by Johnathon
 • 9,090 points • 540 views
0 votes
1 answer

Different unicode versions on various devices

Apparently this is not possible since you ...READ MORE

Aug 29, 2018 in Blockchain by Christine
 • 15,790 points • 539 views
0 votes
1 answer

How to allow request from host machine and deny from other machine, using ethereum in docker?

You can restrict access to the port ...READ MORE

Oct 9, 2018 in Blockchain by Omkar
 • 69,230 points • 537 views
0 votes
1 answer

CompleteableFuture in a loop contruct in a private Ethereum Blockchain

You might be able to benefit from ...READ MORE

Sep 14, 2018 in Blockchain by slayer
 • 29,350 points • 536 views
0 votes
1 answer

Creating bitcoin address in ruby

When you calculate the SHA256 checksum, make ...READ MORE

Aug 28, 2018 in Blockchain by slayer
 • 29,350 points • 536 views
0 votes
1 answer

Problem monitoring geth instance

Try the following command: geth monitor --attach ./chain-data/geth.ipc ...READ MORE

Jan 22, 2019 in Blockchain by Omkar
 • 69,230 points • 535 views
0 votes
1 answer

Setting up Hyperledger Fabric Application with IBM Cloud.

You have to develop your "Client" application ...READ MORE

Nov 6, 2018 in Blockchain by Perry
 • 17,100 points • 535 views
0 votes
1 answer

Error in playground while committing transaction on the ledger

1. Is this transaction is trying to ...READ MORE

Jul 27, 2018 in Blockchain by shweta
 • 440 points • 535 views
0 votes
1 answer

What could be the best term to use for the collection of contracts in a .sol file?

module - don't think so. Because module ...READ MORE

Jun 2, 2018 in Blockchain by Shashank
 • 10,400 points • 535 views
0 votes
1 answer

Web3j: Writing operations on a contract always throw “java.lang.ArrayIndexOutOfBoundsException”

That exception is thrown when you pass ...READ MORE

Oct 1, 2018 in Blockchain by slayer
 • 29,350 points • 533 views
0 votes
1 answer

How to add https security for Node js?

You need to add the key and cert to the createServer function. const options ...READ MORE

Aug 10, 2018 in Blockchain by digger
 • 26,740 points • 533 views
0 votes
1 answer

Why to use libraries over Json-RPC to interact with Blockchain?

Though Json-RPC provides methods to interact with ...READ MORE

Jan 11, 2019 in Blockchain by Omkar
 • 69,230 points • 532 views
0 votes
1 answer

Can a hyperledger composer work without fabric installed?

The pre-requisites section of hyperledger composer explains ...READ MORE

Jul 24, 2018 in Blockchain by digger
 • 26,740 points • 531 views
0 votes
1 answer

How to make transactions without creating assets in multichain?

To transfer your Mycoins, you can make ...READ MORE

Jul 3, 2018 in Blockchain by Omkar
 • 69,230 points • 531 views
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 • 530 views
0 votes
1 answer

Why does Blockchain comes under Distributed Ledger Technology instead of being merely a replicated database?

1. Data in a database is generally subject ...READ MORE

Aug 10, 2018 in Blockchain by Christine
 • 15,790 points • 530 views
0 votes
1 answer

How can merkle trees help validate the content of a block in a blockchain

As long as they are centralized entities ...READ MORE

Feb 28, 2022 in Blockchain by Soham
 • 9,700 points • 529 views
0 votes
1 answer

How to get property of non object in Coinbase API

First, your sendMoney() call is stored into ...READ MORE

Aug 31, 2018 in Blockchain by digger
 • 26,740 points • 529 views
0 votes
1 answer

IBM BLUEMIX BLOCKCHAIN SDK-DEMO failing

These types of intermittent issues are usually ...READ MORE

Aug 3, 2018 in Blockchain by charlie_brown
 • 7,720 points • 528 views
0 votes
1 answer

How a transaction validity is verified in blockchain?

Blockchain has the records the of all ...READ MORE

May 11, 2018 in Blockchain by Johnathon
 • 9,090 points • 528 views
0 votes
1 answer

How to send JSON object from npm module to browser

A simple solution for this would be ...READ MORE

Sep 20, 2018 in Blockchain by digger
 • 26,740 points • 527 views
0 votes
1 answer

NPM Error While Installing Lisk Dependencies

Meet the lib sodium fails. You're using node ...READ MORE

Jun 19, 2018 in Blockchain by charlie_brown
 • 7,720 points • 527 views
+1 vote
1 answer

Can Blocks be reorganized in the blockchain?

In practical applications, invalid transactions can not ...READ MORE

Jul 18, 2018 in Blockchain by Varun
edited Aug 3, 2018 by Omkar • 527 views
+2 votes
1 answer

What is Bitcoin Powered Electrical Outlet?

Bitcoin powered electrical outlet is nothing but ...READ MORE

Sep 20, 2018 in Blockchain by Bhaskar
 • 526 views
0 votes
1 answer

Creating an account with web3.js v0.2.6

The answer is let a=web3.personal.newAccount('!@superpassword') H ...READ MORE

Oct 9, 2018 in Blockchain by Omkar
 • 69,230 points • 525 views
0 votes
1 answer

Deploy API REST IBM Hyperledger Composer Blockchain (bad flag in substitute command: 'U' ERROR)

There is an error in that document. ...READ MORE

Jun 16, 2018 in Blockchain by charlie_brown
 • 7,720 points • 525 views
0 votes
0 answers

Corda - How to check if counter party nodes are running?

0 I have build a CorDapp using "Yo!CorDapp" ...READ MORE

May 28, 2019 in Blockchain by Sriram
 • 160 points • 524 views
+1 vote
1 answer

Ethereum vs Hyperledger: Which is better for business networks?

Hyperledger is preferred for B2B business and ...READ MORE

Sep 20, 2018 in Blockchain by digger
 • 26,740 points • 524 views
+1 vote
1 answer

Node.js API wrapper for altcoin exchange

In order to pass these variables to ...READ MORE

Sep 10, 2018 in Blockchain by digger
 • 26,740 points • 523 views
+1 vote
2 answers

Is there any relation between the number of transactions processes and the miners?

the direct answer to your query is ...READ MORE

Jun 19, 2018 in Blockchain by Perry
 • 17,100 points • 523 views
0 votes
1 answer

Testrpc can't find log handlers

This doesn't usually happen, maybe the log ...READ MORE

Jan 18, 2019 in Blockchain by Omkar
 • 69,230 points • 522 views
0 votes
1 answer

jsonRPCClient Error with php variables

All you have to do is change ...READ MORE

Sep 12, 2018 in Blockchain by digger
 • 26,740 points • 522 views
0 votes
1 answer

Where to store the data of decentralized applications??

Every blockchain is developed in a differnet ...READ MORE

Apr 21, 2018 in Blockchain by Perry
 • 17,100 points • 522 views
0 votes
1 answer

How to hold back KYC reward until the end of the ICO Crowdsale?

Your contract contains two functions - the payable function which ...READ MORE

Jul 4, 2018 in Blockchain by Christine
 • 15,790 points • 521 views
–1 vote
1 answer

Latest block number in Bitcoin

You can get the current block number ...READ MORE

Jan 7, 2019 in Blockchain by Omkar
 • 69,230 points • 519 views
0 votes
1 answer

How to create own coins in Blockchain Ethereum wallet?

To create own coins you have to ...READ MORE

Jul 26, 2018 in Blockchain by slayer
 • 29,350 points • 519 views
0 votes
1 answer

How one can implement blockchain for android development??

Essentially you need to understand what is ...READ MORE

Jun 16, 2018 in Blockchain by charlie_brown
 • 7,720 points • 519 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
 • 9,670 points • 518 views
0 votes
1 answer

Blockchain tutorials for double spending and signature verification

To answer your question, regardless of how ...READ MORE

Feb 24, 2022 in Blockchain by Aditya
 • 7,680 points • 518 views
0 votes
1 answer

How can I create a feeless ERC-20 token?

You can't have another address pay for ...READ MORE

Aug 7, 2018 in Blockchain by Perry
 • 17,100 points • 518 views
0 votes
1 answer

How to build a non-payment application using Ethereum blockchain?

I hope the following link is helpful ...READ MORE

Jul 17, 2018 in Blockchain by digger
 • 26,740 points • 517 views
0 votes
1 answer

How to get a value from SQLite to convert it?

Server side: b = BtcConverter(force_decimal=True) p1btc = b.get_latest_price('USD') p1btcr = ...READ MORE

Sep 6, 2018 in Blockchain by digger
 • 26,740 points • 516 views
0 votes
1 answer

How secure is to implement blockchain at a smaller scale??

Blockchain relies on the number of nodes ...READ MORE

Apr 18, 2018 in Blockchain by Perry
 • 17,100 points • 516 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
 • 9,670 points • 515 views
+1 vote
1 answer

When is the Transmission of new blocks happen between nodes of the network?

When a block is mined, it is ...READ MORE

Mar 27, 2018 in Blockchain by Johnathon
 • 9,090 points • 515 views
0 votes
1 answer

Contract deployment is raising gas issue while transaction and issue vary on various networksbl

Starting time can't be in the past. new ...READ MORE

Oct 3, 2018 in Blockchain by Omkar
 • 69,230 points • 514 views
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