Most viewed questions in Blockchain

0 votes
1 answer

Where is the hyperlewdger fabric endorsement policy stored?

I don't know exactly where is the ...READ MORE

Jul 3, 2018 in Blockchain by charlie_brown
 • 7,720 points • 1,982 views
0 votes
1 answer

truffle npm run dev not working

Are you running this command from the ...READ MORE

Dec 1, 2018 in Blockchain by Omkar
 • 69,180 points • 1,980 views
0 votes
1 answer

Accessing External Api in HyperLedger Fabric

Generally you are not supposed to call ...READ MORE

Nov 17, 2018 in Blockchain by Christine
 • 15,750 points • 1,980 views
0 votes
1 answer

How do nodes communicate with each other in hyperledger?

First let me tell you that there ...READ MORE

Jul 17, 2018 in Blockchain by slayer
 • 29,370 points • 1,973 views
+1 vote
1 answer

What'd be the best database to store data on blockchain?

To read and add data you can ...READ MORE

Apr 25, 2018 in Blockchain by Christine
 • 15,750 points • 1,969 views
0 votes
1 answer

How do I send ether from an EOA to a smart contract?

You include ether to send in the ...READ MORE

Sep 27, 2018 in Blockchain by digger
 • 26,740 points • 1,967 views
0 votes
1 answer

Getting wrong result from SHA256 than what is expected

It's just an encoding issue - don't ...READ MORE

Sep 6, 2018 in Blockchain by digger
 • 26,740 points • 1,967 views
0 votes
1 answer

Hyperledger Fabric: Could not resolve all dependencies for configuration

First, build the chaincode using gradle build. You should ...READ MORE

Nov 2, 2018 in Blockchain by Omkar
 • 69,180 points • 1,965 views
+4 votes
3 answers

What type of database is blockchain?

Blockchain is a distributed database. what makes ...READ MORE

Mar 30, 2018 in Blockchain by Christine
 • 15,750 points • 1,962 views
–1 vote
1 answer

User Identity management on Ethereum Blockchain

User Identity management can be done via ERC725 ...READ MORE

Dec 28, 2018 in Blockchain by Omkar
 • 69,180 points • 1,961 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 • 1,961 views
0 votes
1 answer

Solidity: logical AND outputs parser error

Its Syntax error logical and operator is ...READ MORE

Oct 12, 2018 in Blockchain by Perry
 • 17,100 points • 1,958 views
+1 vote
1 answer

Protocols used in a distributed/dlt system for the nodes to establish communication

yes all are over TCP/IP connections secured ...READ MORE

Aug 6, 2018 in Blockchain by aryya
 • 7,460 points • 1,954 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 • 1,953 views
0 votes
1 answer

“Error getting chaincode package bytes” when deploying chaincode on hyperledger via REST

Considering that you are playing with Bluemix ...READ MORE

Aug 3, 2018 in Blockchain by charlie_brown
 • 7,720 points • 1,952 views
0 votes
1 answer

How to make sure transactions take no fee in a private Ethereum blockchain?

In a private ethereum network you have ...READ MORE

Mar 26, 2018 in Blockchain by Christine
 • 15,750 points
edited Mar 26, 2018 by Christine • 1,951 views
+1 vote
1 answer

Hyperledger network roles assigned to peer nodes.

In a hyperledger fabric network transactions are ...READ MORE

Apr 4, 2018 in Blockchain by Christine
 • 15,750 points • 1,950 views
0 votes
1 answer

How to access member functions of smart contract using web3?

I have implemented a similar feature and ...READ MORE

Aug 13, 2018 in Blockchain by slayer
 • 29,370 points • 1,946 views
0 votes
1 answer

Go- Chaincode function to display struct values

Try this func (t *SimpleChaincode) setDetails(stub shim.ChaincodeStubInterface, args ...READ MORE

Sep 19, 2018 in Blockchain by digger
 • 26,740 points • 1,942 views
0 votes
1 answer

Truffle Error: Migrations contract constructor expected

You are not using constructor() public { ...READ MORE

Aug 10, 2018 in Blockchain by digger
 • 26,740 points • 1,940 views
0 votes
1 answer

Ethereum solidity: Unable to get value from another contract

I have faced similar issues when compiling ...READ MORE

Oct 15, 2018 in Blockchain by Omkar
 • 69,180 points • 1,939 views
0 votes
1 answer

How do I validate the presence of participant owner in Asset transfer transaction?

I found the exact solution and syntax.. ...READ MORE

Aug 9, 2018 in Blockchain by aryya
 • 7,460 points • 1,938 views
0 votes
1 answer

How to use std::iterator with basic type uint8_t*?

std::reverse_iterator takes the original iterator type as ...READ MORE

Aug 24, 2018 in Blockchain by slayer
 • 29,370 points • 1,935 views
0 votes
1 answer

how can i convert stub.GetTxTimestamp() to type string?

You can not directly convert the timestamp ...READ MORE

Jul 5, 2018 in Blockchain by digger
 • 26,740 points • 1,933 views
0 votes
1 answer

Not able send ether to my smart contract's address

It turns out that you need to create ...READ MORE

Sep 25, 2018 in Blockchain by slayer
 • 29,370 points • 1,931 views
0 votes
1 answer

How to develop peer to peer network in hyperledger fabric?

There are two ways you can do ...READ MORE

Jul 10, 2018 in Blockchain by digger
 • 26,740 points • 1,931 views
0 votes
1 answer

Crypto algorithm list

The learning here is that cyphers and ...READ MORE

Apr 7, 2022 in Blockchain by Aditya
 • 7,680 points • 1,929 views
0 votes
1 answer

How to read file from subprocess.open in python?

you call: out, err = p.communicate() READ MORE

Aug 24, 2018 in Blockchain by digger
 • 26,740 points • 1,929 views
0 votes
0 answers

Cannot read property 'curve' of undefined, while running hyperledger fabric project.

Cannot read property 'curve' of undefined ...READ MORE

Jan 30, 2019 in Blockchain by shraddha
 • 1,925 views
0 votes
1 answer

Not able to unbox truffle drizzle

It could be due to a broken ...READ MORE

Jan 9, 2019 in Blockchain by Omkar
 • 69,180 points • 1,925 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 • 1,922 views
0 votes
1 answer

Fatal error while installing web3 node.

Try to add git config by executing ...READ MORE

Aug 10, 2018 in Blockchain by digger
 • 26,740 points • 1,920 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
 • 69,180 points • 1,918 views
+1 vote
1 answer

How can I connect my main Ethereum network to Web3.py using python?

All you need to do is enter ...READ MORE

Apr 17, 2018 in Blockchain by Perry
 • 17,100 points • 1,917 views
+1 vote
1 answer

Solidity: Sending ERC20 Tokens

You can try this code transferTokensTo: function(contract, address_from, ...READ MORE

Sep 26, 2018 in Blockchain by slayer
 • 29,370 points • 1,915 views
0 votes
1 answer

How to get data from Google Finance to Google sheets?

You need to have a from and ...READ MORE

Aug 21, 2018 in Blockchain by slayer
 • 29,370 points • 1,910 views
0 votes
1 answer

Does a hyperledger fabric application client need to connect to all peers?

No, it is not necessary to connect ...READ MORE

Jan 31, 2019 in Blockchain by Omkar
 • 69,180 points • 1,909 views
0 votes
1 answer

Error when trying to deploy Ethereum smart contract using web3j

Create a new credential based on the Credentials.create ...READ MORE

Oct 3, 2018 in Blockchain by slayer
 • 29,370 points • 1,909 views
0 votes
1 answer

React Native to make requests to bitcoin wallet

I found an API that could help ...READ MORE

Aug 23, 2018 in Blockchain by digger
 • 26,740 points • 1,908 views
0 votes
1 answer

What is the default network that truffle migrates to when the config has 2 networks?

If --network is unspecified, it deploys to only development. You ...READ MORE

Oct 15, 2018 in Blockchain by Omkar
 • 69,180 points • 1,906 views
0 votes
1 answer

How do I calculate number of full nodes in bitcoins/altcoins?

You can not calculate/estimate the total number ...READ MORE

Jul 17, 2018 in Blockchain by Shashank
 • 10,400 points • 1,899 views
0 votes
1 answer

How to make a class that fits Blockchain.info Json?

Hey, I found a simple solution for ...READ MORE

Sep 18, 2018 in Blockchain by digger
 • 26,740 points • 1,895 views
0 votes
1 answer

Error in sending value to an Ethereum Smart Contract.

It is stated in Solidity 4.0 documentation ...READ MORE

Jul 23, 2018 in Blockchain by Perry
 • 17,100 points • 1,891 views
0 votes
1 answer

How to monitor Ethereum private network?

geth should be started with --metrics. try the ...READ MORE

Jul 11, 2018 in Blockchain by slayer
 • 29,370 points • 1,889 views
0 votes
1 answer

Poloniex C# API - get trades

Outputting the Trade will just show you ...READ MORE

Sep 25, 2018 in Blockchain by digger
 • 26,740 points • 1,886 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
 • 69,180 points • 1,884 views
0 votes
1 answer

Bitcoin: error parsing json

Make these changes in your code: json="'{" to ...READ MORE

Aug 22, 2018 in Blockchain by digger
 • 26,740 points • 1,882 views
0 votes
1 answer

How to get the current price of a cryptocurrency on google sheets from coinmarketcap?

Your code does not appear to use ...READ MORE

Apr 12, 2022 in Blockchain by Soham
 • 9,730 points • 1,877 views
0 votes
1 answer

How to install chaincode in new Org in hyperledger fabric?

To do this, first enter you cli ...READ MORE

Nov 22, 2018 in Blockchain by Omkar
 • 69,180 points • 1,875 views
0 votes
2 answers

Can't get simple Coinbase button in Node to work

Coinbase sandbox is best to have when ...READ MORE

May 21, 2020 in Blockchain by anonymous
 • 140 points • 1,871 views
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