Most voted questions in Blockchain

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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 • 1,722 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 • 1,606 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 • 1,034 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
 • 29,370 points • 1,030 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 • 2,096 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
 • 29,370 points • 4,304 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 • 1,674 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
 • 29,370 points • 2,206 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 • 1,444 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
 • 29,370 points • 1,604 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 • 1,087 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
 • 29,370 points • 3,288 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 • 1,642 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
 • 29,370 points • 3,851 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
 • 29,370 points • 3,782 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 • 1,027 views
0 votes
2 answers

How to solve “sender doesn't have enough funds to send tx” error in Ethereum?

I also had the same error. I ...READ MORE

Mar 3, 2020 in Blockchain by Noha Abuaesh
 • 6,869 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 • 1,086 views
0 votes
1 answer

How to modify h2 port in Corda for IntelliJ?

When you use IntelliJ, the nodes are ...READ MORE

Jul 27, 2018 in Blockchain by slayer
 • 29,370 points • 1,128 views
0 votes
1 answer

How to set chaincode path in Hyperledger Fabric?

For chaincode to properly run on your ...READ MORE

Jul 27, 2018 in Blockchain by digger
 • 26,740 points • 2,288 views
0 votes
1 answer

How to upload or deploy bna file on IBM blockchain service?

The link you provide is for Go ...READ MORE

Jul 27, 2018 in Blockchain by aryya
 • 7,460 points • 1,262 views
0 votes
1 answer

In PBFT view change what happens to committed operations after a valid snapshot?

I think that those messages are executed ...READ MORE

Jul 27, 2018 in Blockchain by aryya
 • 7,460 points • 1,216 views
0 votes
1 answer

How to solve “ltdl.h: No such file or directory” error?

It seems like you are missing header ...READ MORE

Jul 26, 2018 in Blockchain by slayer
 • 29,370 points • 3,719 views
0 votes
3 answers

How to solve “VM Exception while processing transaction: revert” error?

I am using windows 7. Any solution ...READ MORE

Apr 30, 2019 in Blockchain by Rajesh
 • 7,179 views
0 votes
1 answer

What is the expiry time of blockchain wallet address?

There is no expiry time for your ...READ MORE

Jul 26, 2018 in Blockchain by slayer
 • 29,370 points • 1,506 views
0 votes
1 answer

How to generate events in Hyperledger Fabric?

You can generate events using a method ...READ MORE

Jul 26, 2018 in Blockchain by digger
 • 26,740 points • 1,965 views
0 votes
1 answer

sendProposal - timed out after:45000, sendPeersProposal - Promise is rejected: Error: REQUEST_TIMEOUT

You could simply replace --net=bridge with --net=artifacts_default in your DockerFile.  I used ...READ MORE

Jul 26, 2018 in Blockchain by Perry
 • 17,100 points • 2,334 views
0 votes
1 answer

How to interact with smart contract in GO?

I am providing an example. Modify it ...READ MORE

Jul 26, 2018 in Blockchain by digger
 • 26,740 points • 3,216 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
 • 29,370 points • 1,119 views
0 votes
1 answer

Unable to create a Mist connection to a private Ethereum Blockchain.

You could do the following: 1. Start another ...READ MORE

Jul 26, 2018 in Blockchain by Perry
 • 17,100 points • 1,092 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 • 1,162 views
0 votes
1 answer

Error while generating smart contracts which returns array of struct in Web3j v3.3.1

Solidity does not support returning structs in ...READ MORE

Jul 26, 2018 in Blockchain by Perry
 • 17,100 points • 2,477 views
0 votes
1 answer

Efficiently sorting Ethereum blockchain.

What you are trying to do is ...READ MORE

Jul 25, 2018 in Blockchain by slayer
 • 29,370 points • 1,360 views
0 votes
1 answer

Zip attachment in Corda: How to read zip file using InputStream?

You can not directly read the content ...READ MORE

Jul 25, 2018 in Blockchain by digger
 • 26,740 points • 1,696 views
0 votes
1 answer

Mining on private Ethereum blockchain

You control how miners work on your ...READ MORE

Jul 25, 2018 in Blockchain by Johnathon
 • 9,090 points • 1,477 views
0 votes
1 answer

How to solve “More than one instance of bitcore-lib found” error?

There is a temp solution here. ~/bitcore-explorers/node_modules/bitcore-lib/index.js line 7: bitcore.versionGuard ...READ MORE

Jul 25, 2018 in Blockchain by slayer
 • 29,370 points • 3,322 views
0 votes
1 answer

Error while adding participant to local application.

Do the following to solve the problem composer ...READ MORE

Jul 25, 2018 in Blockchain by digger
 • 26,740 points • 984 views
0 votes
1 answer

What is the process to Create Cryptocurrency for ICO?

No, you don’t have to issue the ...READ MORE

Jul 25, 2018 in Blockchain by slayer
 • 29,370 points • 1,266 views
0 votes
1 answer

Is {from: thesponsor, value: 10000000, gas: 3000000} considered as a transaction object?

Yes, {from: thesponsor, value: 10000000, gas: 3000000} ...READ MORE

Jul 25, 2018 in Blockchain by digger
 • 26,740 points • 1,126 views
0 votes
1 answer

Differences between the composer network and composer identity

'Composer Network' represents the business network entity. ...READ MORE

Jul 25, 2018 in Blockchain by Johnathon
 • 9,090 points • 1,017 views
0 votes
1 answer

How to connect a NS3 node to my local blockchain?

To connect all your nodes with all ...READ MORE

Jul 25, 2018 in Blockchain by digger
 • 26,740 points • 2,913 views
0 votes
1 answer

Cannot download nvm install v.8.9.1 version - clang checksum do not match, sed issue

Try a clean install of node again npm ...READ MORE

Jul 25, 2018 in Blockchain by charlie_brown
 • 7,720 points • 2,961 views
0 votes
1 answer

How to send ethers to a contract?

Transfer of tokens means you will deduct ...READ MORE

Jul 25, 2018 in Blockchain by charlie_brown
 • 7,720 points • 913 views
0 votes
1 answer

Trying to setup a hyperledger but REST API is throwing error

Not sure if you are still looking ...READ MORE

Jul 25, 2018 in Blockchain by aryya
 • 7,460 points • 1,162 views
0 votes
1 answer

Can I upload or attach pdf to the blockchain payload?

Attaching the pdf directly to the blockchain ...READ MORE

Jul 25, 2018 in Blockchain by aryya
 • 7,460 points • 1,948 views
0 votes
1 answer

Looking for a simple Blockchain PoC to implement on a office level

Hyperledger has been collecting some use cases, though not ...READ MORE

Jul 24, 2018 in Blockchain by aryya
 • 7,460 points • 1,317 views
0 votes
1 answer

Why visual studio 2015 can not open blockchain api project on github

If you look in the solution file ...READ MORE

Jul 24, 2018 in Blockchain by aryya
 • 7,460 points • 984 views
0 votes
1 answer

Display the state information to a list of participants dynamically.

There might be a bug in your ...READ MORE

Jul 24, 2018 in Blockchain by Christine
 • 15,750 points • 1,043 views
0 votes
1 answer

eth.getBalance() always returns 0 in testnet

You are not connecting to the right ...READ MORE

Jul 24, 2018 in Blockchain by Christine
 • 15,750 points • 3,128 views
0 votes
1 answer

Can we create a hyperledger fabric with peers from different platforms?

Yes, it is possible. Peers from different ...READ MORE

Jul 24, 2018 in Blockchain by slayer
 • 29,370 points • 842 views
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