Most viewed questions in Blockchain

0 votes
1 answer

Changing block time on Quorum.

They are two commands you can use ...READ MORE

Jun 27, 2018 in Blockchain by Omkar
 • 69,230 points • 1,030 views
0 votes
1 answer

Docker: How to connect Node.js in container to Hyperledger Fabric?

You need to map ~/.composer/cards of your Docker host ...READ MORE

Oct 31, 2018 in Blockchain by Omkar
 • 69,230 points • 1,028 views
0 votes
1 answer

Hyperledger fabric: curl not working to invoke chaincode

Hyperledger Fabric does not offer a REST ...READ MORE

Oct 23, 2018 in Blockchain by Perry
 • 17,100 points • 1,028 views
0 votes
1 answer

Trying to understand nbits value from stratum protocol

You are right, nbits is current network difficulty. Difficulty encoding ...READ MORE

Sep 3, 2018 in Blockchain by Perry
 • 17,100 points • 1,028 views
0 votes
2 answers

Warning: Using contract member “balance” inherited from the address type is deprecated. Solidity

Alternatively you could assign this to a local variable ...READ MORE

Oct 3, 2018 in Blockchain by Rustom
 • 1,027 views
0 votes
1 answer

What is CA (Authority) in Hyperledger Fabric?

Hyperledger fabric includes a modular Certificate Authority ...READ MORE

Jul 12, 2018 in Blockchain by shweta
 • 440 points • 1,025 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
 • 29,360 points • 1,023 views
+1 vote
1 answer

I am unable to change port of composer-rest-server. Please help!

Use full format for running a business ...READ MORE

Mar 27, 2018 in Blockchain by Christine
 • 15,790 points • 1,018 views
0 votes
1 answer

how to connect a web browser with the hyperledger fabric running blockchain peer container please give answers with step by step commands

Hello, It is not possible to connect a ...READ MORE

May 26, 2020 in Blockchain by anonymous
 • 1,017 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
 • 69,230 points • 1,017 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
 • 15,790 points • 1,016 views
0 votes
1 answer

Hyperledger composer: runtime install error card not found peerAdmin

The right way to do it is: downloadFabric.sh startFabric.sh createPeerAdminCard.sh If ...READ MORE

Nov 5, 2018 in Blockchain by Omkar
 • 69,230 points • 1,015 views
0 votes
1 answer

composer network start with error SERVICE_UNAVAILABLE

I think there is an issue with ...READ MORE

Jul 6, 2018 in Blockchain by aryya
 • 7,450 points • 1,011 views
0 votes
1 answer

Retrieve epay.info Balance with VBA and Excel

This code should log you in, provided ...READ MORE

Sep 5, 2018 in Blockchain by digger
 • 26,740 points • 1,010 views
0 votes
1 answer

“make” build ‘EC_GF2m_simple_method’ was not declared in this scope error in centos7

Step 1: I assume that your present ...READ MORE

Sep 17, 2018 in Blockchain by digger
 • 26,740 points • 1,008 views
+1 vote
2 answers

Challenge while setting up Hyperledger Fabric 1.0 in Ubuntu 16.04

The rocksdb error you're seeing wouldn't be ...READ MORE

Mar 27, 2018 in Blockchain by ned_crew
 • 1,610 points
edited Jun 8, 2020 by Sirajul • 1,006 views
0 votes
1 answer

How to create address in BitcoinLib.

Regarding this specific library and assuming that ...READ MORE

Aug 21, 2018 in Blockchain by digger
 • 26,740 points • 1,003 views
0 votes
1 answer

How to use real world/live data in my smart contract?

You cant access/embed real world data using ...READ MORE

Jul 12, 2018 in Blockchain by digger
 • 26,740 points • 1,000 views
0 votes
1 answer

How to upload data from PC or sensors to blockchain?

you can do it by writing a ...READ MORE

Jul 9, 2018 in Blockchain by slayer
 • 29,360 points • 1,000 views
0 votes
2 answers

How to set permissions within a blockchain?

There are blockchains that allow defining permissions. Hyperledger ...READ MORE

Aug 28, 2018 in Blockchain by Michael
 • 1,000 views
+1 vote
1 answer

What problem does pow(proof of work) solves in blockchain?

Proof of Work: When a miner gets a ...READ MORE

Aug 6, 2018 in Blockchain by digger
 • 26,740 points • 999 views
0 votes
1 answer

How can I synchronize smart contract on blockchain?

This is how it is on Blockchain. ...READ MORE

May 29, 2018 in Blockchain by Perry
 • 17,100 points • 998 views
0 votes
1 answer

Hyperledger composer: How to include relationship in custom query?

You are trying to use filter={"include":"resolve"} in Composer Query. ...READ MORE

Nov 16, 2018 in Blockchain by Omkar
 • 69,230 points • 997 views
+1 vote
2 answers

How is Blockchain programming languages different than usual programming?

The programming syntax of most of the ...READ MORE

Mar 30, 2018 in Blockchain by Christine
 • 15,790 points • 997 views
0 votes
1 answer

Do the orderers see the transaction data in Hyperledger Fabric?

No, the orderers do not see the ...READ MORE

Feb 4, 2019 in Blockchain by Omkar
 • 69,230 points • 996 views
+1 vote
1 answer

Unable to send payment using API. Please help.

Firstly, check your passwords, your API code and your wallet ...READ MORE

Apr 3, 2018 in Blockchain by Christine
 • 15,790 points • 994 views
0 votes
1 answer

Not able to migrate contract in Truffle: Error: No network specified. Cannot determine current network

Make these entries in truffle.js file: module.exports = { ...READ MORE

Nov 30, 2018 in Blockchain by Omkar
 • 69,230 points • 993 views
0 votes
1 answer

Need to do pdf file to blockchain and how to do?

Hi @Sagara, Attaching the pdf directly to the blockchain ...READ MORE

Oct 19, 2020 in Blockchain by Gitika
 • 65,910 points • 992 views
+2 votes
1 answer

Composer playground - issue on RHEL

Hey, Renu353. There could be more than ...READ MORE

Sep 24, 2018 in Blockchain by Omkar
 • 69,230 points • 992 views
0 votes
1 answer

GDAX Heartbeat Channel: Failed to subscribe error

You to include "product_ids" : ["BTC-GBP"] as a field ...READ MORE

Sep 7, 2018 in Blockchain by digger
 • 26,740 points • 992 views
0 votes
1 answer

Not able to connect to Ethereum client.

There is another way to link it. ...READ MORE

Apr 28, 2019 in Blockchain by Aashish Pasricha
 • 991 views
+1 vote
1 answer

How to generate Bitcoin address?

Convert the hex string back to bytes ...READ MORE

Aug 20, 2018 in Blockchain by slayer
 • 29,360 points • 990 views
0 votes
1 answer

Not able to execute fabcar demo in Hyperledger

This can be solved by deleting directory ...READ MORE

Jul 24, 2018 in Blockchain by charlie_brown
 • 7,720 points • 990 views
0 votes
1 answer

Unboxing truffle: Shows error: Stopping to prevent overwriting data.

As mentioned in the error: unboxing or ...READ MORE

Dec 1, 2018 in Blockchain by Omkar
 • 69,230 points • 989 views
0 votes
1 answer

What do we mean by a validating peer?

The term validating peer was used in ...READ MORE

Apr 19, 2018 in Blockchain by Christine
 • 15,790 points • 989 views
0 votes
2 answers

VBA code leads to #value! in cell but works in immediate box

Function GetPrice(strTicker As String, Optional dtDate As ...READ MORE

Sep 10, 2018 in Blockchain by Garry
 • 987 views
0 votes
1 answer

Ethereum Mist: Compiling Error with sha3

First run: npm install sha3 and then sudo ...READ MORE

Oct 24, 2018 in Blockchain by Omkar
 • 69,230 points • 984 views
0 votes
1 answer

How do I use hyperledger fabric blockchain to build my own application?

To use fabric I would recommend you ...READ MORE

May 17, 2018 in Blockchain by Johnathon
 • 9,090 points • 983 views
0 votes
1 answer

Hyperledger Fabric: How to ping network using program?

// http://nodejs.org/api.html#_child_processes var sys = require('sys') var exec = ...READ MORE

Nov 9, 2018 in Blockchain by Omkar
 • 69,230 points • 982 views
+1 vote
1 answer

Unable to convert variable to GMP when initializing Bitpay client class (Laravel)

Bitpay automatically uses the encrypted file store, ...READ MORE

Sep 10, 2018 in Blockchain by slayer
 • 29,360 points • 982 views
0 votes
1 answer

How to understand transaction verification in blockchain

They said it takes about 10 minutes ...READ MORE

Jul 17, 2018 in Blockchain by aryya
 • 7,450 points • 982 views
+1 vote
2 answers

Can I include real world data in a smart contract? If so, how?

You cant access/embed real world data using ...READ MORE

Jul 18, 2018 in Blockchain by sapan
 • 981 views
0 votes
1 answer

Hyperledher: How to convert formControlName value to JSON Format?

<textarea [ngModel]="offers[0] | json" formControlName="offers" class="form- ...READ MORE

Nov 12, 2018 in Blockchain by Omkar
 • 69,230 points • 980 views
0 votes
1 answer

Getting error while trying to submit a transaction on hyperledger playground

not enough information as to how you ...READ MORE

Jul 17, 2018 in Blockchain by Shashank
 • 10,400 points • 979 views
0 votes
1 answer

Hyperledger Composer: Failed to load connector module “composer-connector-undefined” for connection type “undefined”

Hey. First, make sure that you are extending ...READ MORE

Oct 30, 2018 in Blockchain by Omkar
 • 69,230 points • 978 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 • 977 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 • 977 views
0 votes
1 answer

PROTOBUF_INLINE_NOT_IN_HEADERS

I had the same problem on Ubuntu ...READ MORE

Jun 7, 2018 in Blockchain by Christine
 • 15,790 points • 977 views
+1 vote
2 answers

How a merkle tree is generated?

In a Merkle tree, transaction IDs (txid) ...READ MORE

Apr 5, 2018 in Blockchain by Shashank
 • 10,400 points • 977 views
+1 vote
1 answer

How is a smart contract stored on a Blockchain?

Smart contract template and transaction events are ...READ MORE

Apr 4, 2018 in Blockchain by Christine
 • 15,790 points • 977 views
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