Most viewed questions in Blockchain

0 votes
1 answer

Truffle init: Error: Cannot find module 'original-require'

I think you need to run this ...READ MORE

Oct 24, 2018 in Blockchain by Omkar
 • 69,190 points • 1,495 views
0 votes
1 answer

Docker on mac error message can't connect to Docker endpoint

While CORE_VM_ENDPOINT set to unix:///var/run/docker.sock, please make sure that var/run/docker.sock exists in ...READ MORE

Sep 19, 2018 in Blockchain by slayer
 • 29,330 points • 1,491 views
0 votes
1 answer

How to run a Javascript in truffle console?

There are two ways to do this. You ...READ MORE

Jan 24, 2019 in Blockchain by Omkar
 • 69,190 points • 1,487 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
 • 1,481 views
0 votes
1 answer

How to run smart contract function using nethereum to return a result?

Try this: var result = getUserAtIndex.CallAsync<byte[]>(123) ...READ MORE

Oct 24, 2018 in Blockchain by Omkar
 • 69,190 points • 1,474 views
0 votes
2 answers

Getting error while Initialising the Blockchain

Hello, @Edureka, You have two options: Execute with sudo. This ...READ MORE

Sep 17, 2020 in Blockchain by Roshni
 • 10,520 points • 1,456 views
0 votes
1 answer

Ethereum call contract method that emits an event, from another contract

You need to refer to the EventEmitter by ...READ MORE

Sep 25, 2018 in Blockchain by digger
 • 26,740 points • 1,454 views
0 votes
1 answer

How to get value from solidity contract using java?

web3j caters for this very use case. It ...READ MORE

Sep 28, 2018 in Blockchain by slayer
 • 29,330 points • 1,452 views
0 votes
1 answer

Hyperledger Fabric: Error endorsing chaincode: rpc error

Run the following commands and try again: docker ...READ MORE

Oct 31, 2018 in Blockchain by Omkar
 • 69,190 points • 1,449 views
–1 vote
1 answer

geth attach Fatal: Unable to attach to remote geth: no known transport for URL scheme "c"

Seems like geth.ipc path is not set. When ...READ MORE

Jan 17, 2019 in Blockchain by Omkar
 • 69,190 points • 1,444 views
0 votes
1 answer

Unable to unmarshal non-string into Go struct field SendTxArgs from of common.Address

Probably you should specify the default_account for client(sender address). In my ...READ MORE

Aug 28, 2018 in Blockchain by Johnathon
 • 9,090 points • 1,444 views
0 votes
1 answer

Ethereum Node Connection: TypeError: Cannot read property 'version' of undefined

In the code that you are using ...READ MORE

Oct 24, 2018 in Blockchain by Omkar
 • 69,190 points • 1,441 views
+1 vote
1 answer

How do I check the history of my ethereum wallet using blockchain API?

f I understand well, you're looking for ...READ MORE

Aug 2, 2018 in Blockchain by Christine
 • 15,790 points • 1,441 views
0 votes
1 answer

eth.getTransactionReceipt returns null

It looks like there's an issue with ...READ MORE

Sep 25, 2018 in Blockchain by slayer
 • 29,330 points • 1,434 views
0 votes
1 answer

How to handle smart contract transaction express nodejs?

sendSignedTransaction returns a Promise combined event emitter. You can ...READ MORE

Oct 15, 2018 in Blockchain by Omkar
 • 69,190 points • 1,432 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 • 1,429 views
+1 vote
1 answer

How can I connect to the specified nodes using IPFS?

You can actually connect to the specific ...READ MORE

Apr 25, 2018 in Blockchain by Christine
 • 15,790 points • 1,429 views
0 votes
1 answer

Can we find out the bitcoin sender by their address?

It is not possible to find the ...READ MORE

Dec 4, 2018 in Blockchain by Omkar
 • 69,190 points • 1,424 views
0 votes
1 answer

Hyperledger Fabric: How to retrieve result from Fabric Transaction?

invokeChainCode(securityContext, functionName, args, options) { ...READ MORE

Nov 8, 2018 in Blockchain by Omkar
 • 69,190 points • 1,423 views
0 votes
1 answer

Hyperledger Fabric:Error while creating channel unknown consortium

Firstly, replace DocChain with DocChainConsortium. Then run: docker-compose -f docker-compose-cli.yaml down --volumes ...READ MORE

Oct 31, 2018 in Blockchain by Omkar
 • 69,190 points • 1,422 views
0 votes
1 answer

Hyperledger Fabric: PEM encoded certificate is required.

Hey, the syntax you are using is ...READ MORE

Nov 5, 2018 in Blockchain by Omkar
 • 69,190 points • 1,404 views
+1 vote
1 answer

What are peers and how a user enrolls into a specific peer?

In fabric, there is an admin, he ...READ MORE

May 3, 2018 in Blockchain by Shashank
 • 10,400 points • 1,402 views
0 votes
1 answer

How to create users on hyperledger and how to assign policies to the created users?

First the users need to establish identity ...READ MORE

Jul 10, 2018 in Blockchain by slayer
 • 29,330 points • 1,401 views
+1 vote
1 answer

Can't instantiate any chaincodes on peers of newly Added org

Seems like chaincode install may have been unsuccessful. Before ...READ MORE

Sep 20, 2018 in Blockchain by Perry
 • 17,100 points • 1,398 views
0 votes
1 answer

Python Double hash SHA256

You can get the given hash by ...READ MORE

Aug 29, 2018 in Blockchain by slayer
 • 29,330 points • 1,398 views
0 votes
1 answer

Truffle npm run dev throws Error: npm ERR! Linux 4.15.0-39-generic

The json file required to run dev is ...READ MORE

Dec 1, 2018 in Blockchain by Omkar
 • 69,190 points • 1,396 views
0 votes
1 answer

How to resolve blockchain DNS using Python Requests?

You could use one of their publicly ...READ MORE

Aug 20, 2018 in Blockchain by Omkar
 • 69,190 points • 1,391 views
0 votes
2 answers

Hyperledger-fabric : chaincode deploy connection error "addrConn.resetTransport failed to create client"

I have your problem too,  PLEASE HELP ...READ MORE

Feb 28, 2019 in Blockchain by Hyperledger hater
 • 1,388 views
+1 vote
1 answer

How can I add image into my Hyperledger instance

In your registry, you can Base64-ify your ...READ MORE

Jun 8, 2018 in Blockchain by aryya
 • 7,450 points • 1,388 views
0 votes
1 answer

Not able to install truffle-contract

There’s a permission error. Run this command ...READ MORE

Jan 23, 2019 in Blockchain by Omkar
 • 69,190 points • 1,385 views
0 votes
1 answer

Çannot implement web3.eth.subscribe on Web3 version 1.0.0-beta.27

As the error suggests, pub/sub is not ...READ MORE

Jun 19, 2018 in Blockchain by Perry
 • 17,100 points
edited Jun 19, 2018 by Perry • 1,385 views
0 votes
1 answer

How can i create a simple P2P network on a blockchain?

To develop your own cryptocurrency, you need ...READ MORE

Apr 20, 2018 in Blockchain by Christine
 • 15,790 points • 1,382 views
0 votes
1 answer

How can I communicate with peer to peer in a hyperledger fabric local network?

The peers communicate among them through the ...READ MORE

May 24, 2018 in Blockchain by Johnathon
 • 9,090 points • 1,379 views
0 votes
1 answer

How to create light wallet in Web3J?

You can use this method to create ...READ MORE

Aug 10, 2018 in Blockchain by slayer
 • 29,330 points • 1,374 views
+1 vote
1 answer

How to perform a simple 1-to-1 Bitcoin Transaction with Bitcore?

What is the argument utxos int the ...READ MORE

Jul 20, 2018 in Blockchain by charlie_brown
 • 7,720 points • 1,374 views
0 votes
1 answer

What are the differences between chain and state database in hyperledger fabric?

There are two place which "store" data ...READ MORE

Jul 11, 2018 in Blockchain by Shashank
 • 10,400 points • 1,374 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
 • 1,370 views
0 votes
1 answer

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
 • 9,670 points • 1,363 views
+2 votes
1 answer

Trying to instantiate chain code on channel

Looking at the error, it seems like ...READ MORE

Aug 1, 2019 in Blockchain by Jessica
 • 1,360 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 • 1,360 views
0 votes
1 answer

How to create an instance of contract in Truffle console?

Hi, @There, I would suggest you go through ...READ MORE

Jun 17, 2020 in Blockchain by Gitika
 • 65,910 points • 1,356 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 • 1,349 views
0 votes
1 answer

Ethereum, web3, Error: invalid argument 0: cannot unmarshal non-string as hex data, when I call a contract

I have the same problem. But with ...READ MORE

Oct 8, 2018 in Blockchain by Omkar
 • 69,190 points • 1,344 views
0 votes
1 answer

Ethereum: functions Burn and Transfer source

This statement is used to publish an event that ...READ MORE

Oct 9, 2018 in Blockchain by Omkar
 • 69,190 points • 1,343 views
–1 vote
1 answer

Not able to compile truffle project

Hi. If you look at the error ...READ MORE

Jan 17, 2019 in Blockchain by Omkar
 • 69,190 points • 1,333 views
+4 votes
4 answers

How does the blockchain verification process work?

First of all, when someone creates a ...READ MORE

Mar 26, 2018 in Blockchain by Perry
 • 17,100 points • 1,330 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
 • 7,660 points • 1,329 views
+1 vote
1 answer

How to deploy ethereum smart contracts on a website?

There are many ways to do this: 1 ...READ MORE

Mar 27, 2018 in Blockchain by Johnathon
 • 9,090 points • 1,329 views
–1 vote
1 answer

How to add a static node to private ethereum network?

There are two ways to do this. 1. Configuring ...READ MORE

Jan 11, 2019 in Blockchain by Omkar
 • 69,190 points • 1,317 views
0 votes
1 answer

Not Able to register a user with Hyperledger-Fabric v1.1 preview

The error: "Certificate not found with AKI 'e729224e8b3f31784c8a93c5b8ef6f4c1c91d9e6e577c45c33163609fe40011' ...READ MORE

Jun 16, 2018 in Blockchain by charlie_brown
 • 7,720 points • 1,315 views
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