Trending questions in Blockchain

+1 vote
4 answers

How PBFT algorithm works?

PBFT is a way for a distributed ...READ MORE

Apr 25, 2019 in Blockchain by Kiran
 • 8,493 views
0 votes
1 answer

JavaFX Location is not set error message

I had this problem and found this ...READ MORE

Sep 19, 2018 in Blockchain by slayer
 • 29,370 points • 10,010 views
0 votes
1 answer

Solidity, why the used function is placed before the brace "{}" when define a new function?

Hey there! 1. Yes, using the same name ...READ MORE

Apr 4, 2019 in Blockchain by Omkar
 • 69,220 points • 1,504 views
0 votes
0 answers

Error: Unexpected token o in JSON at position 1

I have been working with Interacting a ...READ MORE

Mar 6, 2019 in Blockchain by saeedi
 • 120 points
edited Mar 6, 2019 by Omkar • 2,734 views
0 votes
1 answer

How to reintialize genesis block in geth ethereum?

You are getting this error because you ...READ MORE

Dec 6, 2018 in Blockchain by Omkar
 • 69,220 points • 6,571 views
0 votes
1 answer

Hyperledger Fabric: “Local Fabric binary version does not match this newer version of BYFN and is unsupported”.

You need to first delete the existing ...READ MORE

Nov 19, 2018 in Blockchain by Omkar
 • 69,220 points • 7,171 views
0 votes
1 answer

"Migrations" -- Returned error: authentication needed: password or unlock.

By default, the accounts are locked and ...READ MORE

Jan 17, 2019 in Blockchain by Omkar
 • 69,220 points • 4,563 views
+1 vote
1 answer

Permission is denied in Oracle VM when trying to move multichain util, multichaind and multichain-cli from tmp to /usr/local/bin

You will need root permissions to move a file ...READ MORE

Apr 8, 2019 in Blockchain by Omkar
 • 69,220 points • 1,049 views
0 votes
2 answers

Hyperledger Fabric: Channel creation failed! FAILED to execute End-2-End Scenario

This error usually occurs if some old ...READ MORE

May 8, 2019 in Blockchain by John
 • 3,349 views
0 votes
1 answer

How to install metamask?

MetaMask is a browser plugin, you install ...READ MORE

Feb 28, 2019 in Blockchain by Lakhan
 • 2,666 views
0 votes
0 answers

How to set chaincode path in Hyperledger Fabric in fabric.sh file

i set the path to chaincode in ...READ MORE

Mar 23, 2019 in Blockchain by Malik
retagged Mar 25, 2019 by Omkar • 1,676 views
0 votes
2 answers

Truffle compile/migrate not working

In my case, use sudo command. truffle compile ...READ MORE

Feb 20, 2019 in Blockchain by byoul
 • 3,105 views
0 votes
1 answer

geth: Fatal: Error starting protocol stack: datadir already used by another process

It seems like geth is already running. ...READ MORE

Dec 6, 2018 in Blockchain by Omkar
 • 69,220 points • 6,172 views
–1 vote
1 answer

Not able to install truffle

I know this is very frustrating, I ...READ MORE

Jan 17, 2019 in Blockchain by Omkar
 • 69,220 points • 4,351 views
0 votes
1 answer

How to install Ethereum Blockchain on Linux?

To install Ethereum on Linux, open the ...READ MORE

Feb 28, 2019 in Blockchain by Kruti
 • 2,486 views
+1 vote
1 answer

How to install Hyperledger Composer on Linux?

You need some pre-requisites to install Hyperledger ...READ MORE

Mar 1, 2019 in Blockchain by Avanti
 • 2,399 views
+1 vote
0 answers

cryptogen: error: open ./crypto-config.yaml: The system cannot find the file specified [closed]

I created a generate.sh to generate crypto ...READ MORE

Mar 1, 2019 in Blockchain by Tharindu
 • 170 points
closed Mar 1, 2019 by Tharindu • 2,417 views
+1 vote
2 answers

Hyperledger Java SDK Client Event Listener to register and listen Blocks

First add the eventhub, and then  register ...READ MORE

Oct 29, 2018 in Blockchain by Omkar
 • 69,220 points • 3,483 views
0 votes
1 answer

Truffle "Migrations" ran out of gas error

This error is caused because the amount ...READ MORE

Jan 17, 2019 in Blockchain by Omkar
 • 69,220 points • 4,190 views
0 votes
1 answer

Extract data from Json url result php

Try this code, it worked for me: $balance ...READ MORE

Sep 3, 2018 in Blockchain by slayer
 • 29,370 points • 10,062 views
0 votes
3 answers

Querying past transaction data from Hyperledger Fabric.

You can use shim function and query ...READ MORE

Apr 26, 2019 in Blockchain by Shaheen
 • 6,254 views
0 votes
1 answer

How to set token price in solidity?

We know that 1 Ether = 1018 wei, ...READ MORE

Sep 25, 2018 in Blockchain by slayer
 • 29,370 points • 9,010 views
0 votes
1 answer

how to get the information of asset created in hyperledger composer in case of with out transaction?

First, get the list of all existing ...READ MORE

Mar 13, 2019 in Blockchain by Omkar
 • 69,220 points • 1,683 views
0 votes
1 answer

Hyperledger error-installation error

Hey, there is a thread for the ...READ MORE

Apr 5, 2019 in Blockchain by Omkar
 • 69,220 points • 680 views
0 votes
1 answer

Truffle compile compilation failed

This is a version compatibility problem. In ...READ MORE

Jan 17, 2019 in Blockchain by Omkar
 • 69,220 points • 4,032 views
–1 vote
1 answer

Not able to create new account in geth for private ethereum blockchain

personal.newAccount() is not a default geth method. This ...READ MORE

Jan 17, 2019 in Blockchain by Omkar
 • 69,220 points • 4,050 views
0 votes
2 answers

How to completely uninstall hyperledger composer?

You might have to uninstall/remove files from ...READ MORE

Aug 9, 2018 in Blockchain by slayer
 • 29,370 points • 5,373 views
+2 votes
3 answers

Blockchain and HyperLedger difference

Hey, you got it right! Blockchain is ...READ MORE

Sep 7, 2018 in Blockchain by Omkar
 • 69,220 points • 1,373 views
0 votes
0 answers

Hyperledger Fabric: Errors in Deliver and Broadcast services

Hello, I have create successfully a multi-org, ...READ MORE

Feb 22, 2019 in Blockchain by Cha
 • 2,456 views
0 votes
1 answer

Hyperledger Fabric: How to Parse arrays in req.body in node js express?

You can get the value from the ...READ MORE

Nov 16, 2018 in Blockchain by Kavya
 • 6,606 views
0 votes
1 answer

Can not open geth console: Fatal: Error starting protocol stack: listen tcp :30303: bind: address already in use

The default port for geth is 30303. ...READ MORE

Dec 6, 2018 in Blockchain by Omkar
 • 69,220 points • 5,698 views
0 votes
1 answer

How does the architecture of a blockchain search work?

Hey there! There is no architecture called ...READ MORE

Mar 28, 2019 in Blockchain by Suman
 • 883 views
0 votes
0 answers

Cannot create genesis block?

When I try to create a genesis block ...READ MORE

Feb 27, 2019 in Blockchain by Tharindu
 • 170 points
edited Feb 28, 2019 by Omkar • 2,142 views
0 votes
0 answers

how to add path of chain code in hyperledger fabric in startfabric.sh

#!/bin/bash # # Copyright IBM Corp All Rights Reserved # # ...READ MORE

Mar 17, 2019 in Blockchain by anonymous
 • 1,351 views
–1 vote
1 answer

How to get pending transaction in geth?

You can check the pending transactions using ...READ MORE

Jan 17, 2019 in Blockchain by Omkar
 • 69,220 points • 3,902 views
+1 vote
2 answers

Using Composite Key formation to get states for a date range in Hyperledger Fabric V1.0

I think you have found a partial ...READ MORE

Jul 20, 2018 in Blockchain by charlie_brown
 • 7,720 points • 5,087 views
0 votes
0 answers

Cannot create crypto materiel with cryptogen command?

When I am creating crypto-materiel with cryptogen ...READ MORE

Feb 26, 2019 in Blockchain by Tharindu
 • 170 points • 1,939 views
0 votes
1 answer

Error while sending an address to functions

In solidity 0.5.0 (and above) there are ...READ MORE

Jan 23, 2019 in Blockchain by Omkar
 • 69,220 points • 3,301 views
0 votes
1 answer

Where is default chaincode is located in pc?

The path that you have mentioned in ...READ MORE

Mar 25, 2019 in Blockchain by Omkar
 • 69,220 points • 711 views
+1 vote
3 answers

Not able to read a file from my assets folder

Hi.. I faced a similar problem in ...READ MORE

Oct 25, 2018 in Blockchain by Shrikanth
 • 7,136 views
0 votes
1 answer

Not able to install ganache

There is an alternative method. You can ...READ MORE

Feb 8, 2019 in Blockchain by Omkar
 • 69,220 points • 2,579 views
0 votes
1 answer

Installing Multichain on Linux

To install Multichain in Linux, you first ...READ MORE

Mar 1, 2019 in Blockchain by Joshi
 • 1,593 views
0 votes
1 answer

How to add peer to ethereum private network?

To connect a node to already existing ...READ MORE

Jan 22, 2019 in Blockchain by Omkar
 • 69,220 points • 3,165 views
0 votes
1 answer

Installing Ethereum on Windows

You can install Ethereum on windows using ...READ MORE

Feb 28, 2019 in Blockchain by Raman
 • 1,461 views
0 votes
1 answer

Solidity Error: Exceeds block gas limit

Remove the line norpc:true and change the ...READ MORE

Jan 24, 2019 in Blockchain by Omkar
 • 69,220 points • 3,003 views
0 votes
1 answer

How to force gradle to take UTF-8 encoding instead of operating system default encoding?

I've removed the UTF-8 chars from erroneous ...READ MORE

Oct 12, 2018 in Blockchain by Perry
 • 17,100 points • 7,445 views
0 votes
1 answer

How to make any node connect to multichain?

You can change the configuration of the ...READ MORE

Mar 1, 2019 in Blockchain by Omkar
 • 69,220 points • 1,354 views
+1 vote
2 answers

How to solve Hyperledger Fabric "error endorsing chaincode" error?

Try to install chaincode with a name ...READ MORE

Jul 13, 2018 in Blockchain by digger
 • 26,740 points • 4,856 views
0 votes
1 answer

How to increase speed of block generation in Multichain?

It could be because of the script ...READ MORE

Mar 1, 2019 in Blockchain by Omkar
 • 69,220 points • 1,271 views
0 votes
1 answer

How many peers in fabric network need to endorse a transaction?

The number of peers required to endorse ...READ MORE

Jan 31, 2019 in Blockchain by Omkar
 • 69,220 points • 2,557 views
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