Most answered questions in Blockchain

0 votes
1 answer

How to set up hyperledger fabric on 2 different PCs?

I would recommend that you look at ...READ MORE

Aug 2, 2018 in Blockchain by aryya
 • 7,450 points • 1,239 views
0 votes
1 answer

Invalid Batch or signature in Savtooth

This will solve your problem import org.apache.commons.codec.binary.Hex; Transaction txn ...READ MORE

Aug 1, 2018 in Blockchain by digger
 • 26,740 points • 748 views
0 votes
1 answer

How to solve “insufficient funds for gas * price + value” error?

Change the following line Credentials credentials = Credentials.create(firstAccount); To ...READ MORE

Aug 1, 2018 in Blockchain by slayer
 • 29,350 points • 5,300 views
0 votes
1 answer

How to solve “error: no objects passed to create” Error?

It seems like a problem with the ...READ MORE

Aug 1, 2018 in Blockchain by digger
 • 26,740 points • 7,406 views
0 votes
1 answer

Cant install quorum blockchain.

You are facing this issue because you ...READ MORE

Aug 1, 2018 in Blockchain by slayer
 • 29,350 points • 736 views
0 votes
1 answer

How to send funds using CLI?

You can send funds from one address ...READ MORE

Aug 1, 2018 in Blockchain by digger
 • 26,740 points • 506 views
0 votes
1 answer

Ethereum smart contract event trigger notification

I have an example here for web3js ...READ MORE

Aug 1, 2018 in Blockchain by slayer
 • 29,350 points • 1,918 views
0 votes
1 answer

How does this Ethereum Console output mean?

I have divided the output into different ...READ MORE

Aug 1, 2018 in Blockchain by digger
 • 26,740 points • 470 views
0 votes
1 answer

How to send bitcoins to multiple recipients at once?

To send bitcoins to multiple recipients, you ...READ MORE

Aug 1, 2018 in Blockchain by slayer
 • 29,350 points • 466 views
0 votes
1 answer

How does the consensus mechanism work for a SaaS based blockchain?

Blockchain doesn't have the client-server architecture that ...READ MORE

Aug 1, 2018 in Blockchain by Christine
 • 15,790 points • 399 views
0 votes
1 answer

Where do we execute Smart Contracts on Hyperledger Fabric?

Take a look here: http://hyperledger-fabric.readthedocs.io/en/latest/txflow.html Hyperledger Fabric has 2 ...READ MORE

Aug 1, 2018 in Blockchain by Christine
 • 15,790 points • 441 views
0 votes
1 answer

how to give back each customer a self-defined amount of ether after ICO ends in smart contract?

It's a lot of question. I will ...READ MORE

Aug 1, 2018 in Blockchain by aryya
 • 7,450 points • 680 views
0 votes
1 answer

how to modify smart contract template for self defined functionality

TL;DR; This code simply defines the start ...READ MORE

Aug 1, 2018 in Blockchain by aryya
 • 7,450 points • 408 views
0 votes
1 answer

Problem with deploying to a single organization Hyperledger Fabric

It appears to me that  the proposal is ...READ MORE

Aug 1, 2018 in Blockchain by Christine
 • 15,790 points • 639 views
0 votes
1 answer

Blockchain PoC Implementation

It depends on your use case like ...READ MORE

Aug 1, 2018 in Blockchain by Christine
 • 15,790 points • 430 views
0 votes
1 answer

Why RLP encoding is used in Ethereum?

RLP is intended to be a highly ...READ MORE

Aug 4, 2018 in Blockchain by Mohini
 • 260 points • 1,451 views
0 votes
1 answer

How to get the current state of a smart contract?

Hey, you gotta provide the contract code, and ...READ MORE

Aug 1, 2018 in Blockchain by Perry
 • 17,100 points • 916 views
0 votes
1 answer

I want to use Blockchain receive API without exchange rate

You are not using receive API you are using Exchange ...READ MORE

Aug 1, 2018 in Blockchain by Perry
 • 17,100 points • 404 views
0 votes
1 answer

geth personal.newAccount()\npassword command broke Ethereum CLI

The issue is with your command. It's ...READ MORE

Aug 1, 2018 in Blockchain by Perry
 • 17,100 points • 668 views
0 votes
1 answer

Hyperledger Composer Error trying to instantiate composer runtime

If this message occurs in instantiating composer ...READ MORE

Jul 31, 2018 in Blockchain by shweta
 • 440 points • 683 views
0 votes
1 answer

Not able to send payments using Blockchain API.

Try the following code. It should help ...READ MORE

Jul 31, 2018 in Blockchain by slayer
 • 29,350 points • 460 views
0 votes
1 answer

How to use two different APIs to get combined results?

You can use nesting of function to ...READ MORE

Jul 31, 2018 in Blockchain by slayer
 • 29,350 points • 373 views
0 votes
1 answer

How to join a peer to a channel in Hyperledger Fabric?

When you run the command: peer channel create ...READ MORE

Jul 31, 2018 in Blockchain by digger
 • 26,740 points • 1,919 views
0 votes
1 answer

Can’t find value for key while using CouchDB for Fabric.

In the output you have mentioned: {   "id": ...READ MORE

Jul 31, 2018 in Blockchain by slayer
 • 29,350 points • 1,432 views
0 votes
1 answer

How to get all address and send ethers in solidity using a loop?

I found a similar code somewhere: contract  Holders{ uint ...READ MORE

Jul 31, 2018 in Blockchain by digger
 • 26,740 points • 2,568 views
0 votes
1 answer

Using web3swift to create raw transaction.

Here you go: var options = Web3Options.defaultOptions() options.gasLimit = ...READ MORE

Jul 31, 2018 in Blockchain by digger
 • 26,740 points • 817 views
0 votes
1 answer

How to solve “Error: Expected a Resource or Concept”?

There are few errors in code. I ...READ MORE

Jul 31, 2018 in Blockchain by slayer
 • 29,350 points • 1,010 views
0 votes
1 answer

How to solve “ERROR: manifest for hyperledger/fabric-couchdb:latest not found” error?

This seems to be a problem with ...READ MORE

Jul 31, 2018 in Blockchain by digger
 • 26,740 points • 1,093 views
0 votes
1 answer

Can someone explain me how PBFT works?

You can submit your transaction to any ...READ MORE

Jul 31, 2018 in Blockchain by Shashank
 • 10,400 points • 703 views
0 votes
1 answer

How can i extract information from Ethereum blockchain using python?

Give the RPC (--rpc) option when you ...READ MORE

Jul 31, 2018 in Blockchain by Shashank
 • 10,400 points • 1,799 views
0 votes
1 answer

How do i startup the quantum resistant ledger (QRL) node?

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

Jul 31, 2018 in Blockchain by Shashank
 • 10,400 points • 659 views
0 votes
1 answer

How to download the full blocks (with transactions) directly and in parallel from the connected nodes in NodesGroup?

 just got informed, that NBitcoin currently does ...READ MORE

Jul 31, 2018 in Blockchain by Shashank
 • 10,400 points • 426 views
0 votes
1 answer

Error in Chaincodes not getting picked up by ./startFabric.sh

After changing chaincode in fabric-samples/chaincode/fabcar/go/fabcar.go (this is ...READ MORE

Jul 31, 2018 in Blockchain by Shashank
 • 10,400 points • 1,064 views
0 votes
1 answer

Unable to perform an operation in Ethereum private network

It seems that the Unix socket can't ...READ MORE

Jul 31, 2018 in Blockchain by Shashank
 • 10,400 points • 909 views
0 votes
1 answer

Can we custom tokens on Ethereum?

Yes, it is possible. You need to ...READ MORE

Jul 31, 2018 in Blockchain by Mohini
 • 260 points • 460 views
0 votes
1 answer

Hyperledger fabric ./byfn.sh -m up command hangs during execution

Run the following command: sudo docker stop $(docker ...READ MORE

Jul 30, 2018 in Blockchain by slayer
 • 29,350 points • 568 views
0 votes
1 answer

What is approve and allowance method?

approve(): This method is used by one ...READ MORE

Jul 30, 2018 in Blockchain by digger
 • 26,740 points • 1,632 views
+2 votes
1 answer

How to solve “SyntaxError: unexpected EOF” error in python?

There is not a problem in the ...READ MORE

Jul 30, 2018 in Blockchain by slayer
 • 29,350 points • 4,962 views
0 votes
1 answer

Solidity how to solve “Error Encoding arguments ” error while using create button?

When you pass multiple arguments, you need ...READ MORE

Jul 30, 2018 in Blockchain by slayer
 • 29,350 points • 3,563 views
0 votes
1 answer

Solidity and Web.js for Ethereum blockchain data

Your code is not right. I have ...READ MORE

Jul 30, 2018 in Blockchain by digger
 • 26,740 points • 999 views
0 votes
1 answer

How to extract Ethereum Blockchain data?

You are using web3.eth.getTransaction(txHash) web3.eth.getTransaction(txHash) will only return info ...READ MORE

Jul 30, 2018 in Blockchain by slayer
 • 29,350 points • 1,451 views
0 votes
1 answer

Why is there no infinite loop problem in Hyperledger Fabric?

Hyperledger uses a timeout mechanism for chaincode ...READ MORE

Jul 30, 2018 in Blockchain by digger
 • 26,740 points • 737 views
0 votes
1 answer

Solidity code to change value of name

Try this for setName: function setName(string _name) public ...READ MORE

Jul 30, 2018 in Blockchain by slayer
 • 29,350 points • 1,065 views
0 votes
1 answer

Not able to execute a deployed contract?

The problem is that you are not ...READ MORE

Jul 30, 2018 in Blockchain by digger
 • 26,740 points • 490 views
0 votes
1 answer

How to “unrecognized import path error” while using go for hyperledger fabric?

The solution to this problem is as ...READ MORE

Jul 27, 2018 in Blockchain by slayer
 • 29,350 points • 2,444 views
0 votes
1 answer

How to solve “network state unknown. Review successful transactions manually” error?

There seems to be error in the ...READ MORE

Jul 27, 2018 in Blockchain by digger
 • 26,740 points • 1,060 views
0 votes
1 answer

Php code to generate Ethereum wallets.

You can use web3.eth.accounts in web3js web3.eth.accounts.create(); With Php, ...READ MORE

Jul 27, 2018 in Blockchain by slayer
 • 29,350 points • 3,134 views
+2 votes
1 answer

How to store data in Hyperledger Fabric after restart?

When you use docker-compose down, all the ...READ MORE

Jul 27, 2018 in Blockchain by digger
 • 26,740 points • 2,810 views
0 votes
1 answer

How to solve “The method personal_newAccount does not exist/is not available” Error?

You are connecting using WS but have ...READ MORE

Jul 27, 2018 in Blockchain by slayer
 • 29,350 points • 2,827 views
0 votes
1 answer

Can I use inherited contract in artifacts.require() statement?

Yes, this code will work just fine. ...READ MORE

Jul 27, 2018 in Blockchain by digger
 • 26,740 points • 504 views
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