Trending questions in Blockchain

+1 vote
2 answers

how to fetch data from excel (which has some 100 data)or csv file and use that bulk data in smart contract and validate

You can not directly import an excel/csv ...READ MORE

Oct 30 in Blockchain by Tina
 • 98 views
0 votes
0 answers

how to create a voting Dapp ?!

Hello i am student and i wanna ...READ MORE

Oct 6 in Blockchain by Aymen
 • 120 points • 82 views
0 votes
1 answer

Can we pass string values to the contract which holds bytes 32 only?

A string is not byte32 and so ...READ MORE

Aug 26 in Blockchain by Rina
 • 64 views
0 votes
0 answers

Can I change the network id in ganache GUI? Is it work for calling the functions in solidity?

Can I change the network id in ...READ MORE

Aug 16 in Blockchain by anonymous
edited Aug 19 by Omkar • 76 views
+1 vote
1 answer

hyperledger fabric: can't find package: github.com/pkg/errors in GOPATH or GOROOT

Hey @aiga, try to add the package ...READ MORE

Aug 5 in Blockchain by Esha
 • 140 views
0 votes
0 answers

Error while sending a transaction from Web3py to a Smart Contract in Remix

Ok, so I am trying to make ...READ MORE

Aug 5 in Blockchain by Yaxir
edited Aug 5 by Omkar • 59 views
+1 vote
1 answer

Trying to instantiate chain code on channel

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

Aug 1 in Blockchain by Jessica
 • 62 views
0 votes
0 answers

How to use mutual authentication without CA in hyperledger fabric

I want to use some certificateless mutual ...READ MORE

Jul 29 in Blockchain by behnaz
 • 120 points • 58 views
0 votes
1 answer

how to develop healthcare records using DApp on Blockchain?

Hi. As Healthcare will be a private ...READ MORE

Jul 26 in Blockchain by Esha
 • 81 views
+1 vote
1 answer

how to create channels with new orgs in Fabric? getting error: Attempted to include a member which is not in the consortium.

$: peer channel fetch config config_block.pb -o ...READ MORE

Jul 23 in Blockchain by Ayush
 • 180 points • 178 views
0 votes
0 answers

how to Build Bitcoin address and balance database?

How to build Bitcoin Address and Balance ...READ MORE

Jul 24 in Blockchain by Raj
 • 180 points • 53 views
+1 vote
0 answers

I am trying to replace the fabric-CA with External-CA to work in keep fabric in production environment, in Hyper-ledger fabric any suggestions?

Hi  can, i know how you implemented ...READ MORE

Jul 23 in Blockchain by anonymous
edited Jul 23 • 38 views
+1 vote
0 answers

Metamask popup on Server side (Express js) ?

So I have this problem when i ...READ MORE

Jul 15 in Blockchain by Dzaky
 • 130 points • 104 views
+2 votes
1 answer

how to convert hash160 to bitcoin address in python?

Hey @Raj. I use the following script. ...READ MORE

Jul 12 in Blockchain by Tanisha
 • 122 views
+1 vote
0 answers

How to Set Condition on apistub.getstateByRange(startkey,endkey) in Go chaincode of hyperledger fabric

actually i have 2 structure in my ...READ MORE

Jul 14 in Blockchain by Malik
 • 69 views
+1 vote
1 answer

Multichain "Resource temporarily unavailable" error

The command you have executed is used ...READ MORE

Jul 9 in Blockchain by Olivia
 • 38 views
+1 vote
1 answer

Listing all Bitcoin Miners

Yes, you can list down all the ...READ MORE

Jul 3 in Blockchain by John
 • 69 views
0 votes
1 answer

How can I become a miner in Blockchain?

You need to download software to become ...READ MORE

Jul 3 in Blockchain by Raman
 • 98 views
0 votes
1 answer

In assymetric cryptography how and when the sender will share the public key with the receiver?

Consider this example: Suppose Bob wants to send ...READ MORE

Jul 3 in Blockchain by Sheila
 • 47 views
0 votes
1 answer

Public and private keys created residing in laptop/mobile while initiating a transaction

You need to provide the receiver's public key ...READ MORE

Jul 3 in Blockchain by Rachit
 • 39 views
0 votes
0 answers

LIVE PODCAST THREAD** (#2 Are Smart contracts really the Future?)

Hey guys this is the link to ...READ MORE

Jun 28 in Blockchain by Vardhan
 • 12,730 points • 39 views
0 votes
0 answers

In R3 Corda I don't know to start the web server port in server?

In R3 Corda all the nodes are ...READ MORE

Jun 26 in Blockchain by anonymous
 • 127 views
+1 vote
1 answer

Where to download the corda network bootstrapper 3.1 or 3.2 version for r3 corda?

Here are the steps to setup corda ...READ MORE

Jun 24 in Blockchain by Raghu
 • 95 views
0 votes
0 answers

Migrations ran out of gas

I have unboxed pet-shop. Then inside the ...READ MORE

Jun 25 in Blockchain by anonymous
 • 108 views
0 votes
0 answers

How do we increase the amount of gas?

Jun 24 in Blockchain by Neha Agarwal
 • 61 views
0 votes
0 answers

Network Parameter and additional node info file in R3 corda?

Is that network parameter and additional node ...READ MORE

Jun 21 in Blockchain by anonymous
 • 51 views
0 votes
0 answers

Couldn't find network parameters file and compatibility zone wasn't configured/isn't reachable

After ran this command java -jar network-bootstrapper-VERSION.jar --dir <nodes-root-dir>.The files is generated.After ...READ MORE

Jun 19 in Blockchain by anonymous
 • 121 views
0 votes
1 answer

Using public and private keys for Blockchain transaction

You need to provide the receiver's public ...READ MORE

Jun 20 in Blockchain by Will
 • 46 views
0 votes
1 answer

Symmetric key in cryptography

Yes, the same key is used to ...READ MORE

Jun 20 in Blockchain by Firoz
 • 37 views
0 votes
0 answers

how can i integrate fog computing simulation tools and Blockchain for research purpose

Jun 21 in Blockchain by anonymous
 • 120 points • 33 views
0 votes
0 answers

Is there any API for ether sent transaction in ethereum without using web3.js

I want to do a transaction (sent ...READ MORE

Jun 17 in Blockchain by vishal tyagi
 • 43 views
0 votes
0 answers

Can't call contract function in Remix in Web3 provider mode, but it works in Javascript VM

A simple contract for addition, an error ...READ MORE

Jun 15 in Blockchain by XHQ
 • 69 views
0 votes
1 answer

Trying to implement block-chain payment in website

There are many plugins that you can ...READ MORE

Jun 11 in Blockchain by Tina
 • 49 views
0 votes
1 answer

web3 accounts coming undefined

Hi @gaurav! To access all the accounts, you ...READ MORE

Jun 10 in Blockchain by Ritvik
 • 97 views
0 votes
1 answer

What is geth and solidity in Blockchain?

geth is a tool used to run a ...READ MORE

Jun 11 in Blockchain by Rishi
 • 61 views
0 votes
1 answer

Decentralisation and Smart contract

Hey, @Vijayaprasad! The decentralization in Blockchain refers ...READ MORE

Jun 6 in Blockchain by Omkar
 • 67,660 points • 40 views
+1 vote
3 answers

Hyperledger Fabric: Not able to create the channel "Channel creation failed" error

Seems like you have not set the ...READ MORE

Nov 2, 2018 in Blockchain by Omkar
 • 67,660 points • 1,059 views
0 votes
3 answers

Cannot find module 'fabric-network' - is my application installation done wrong?

First, install grpc and run it: $ npm ...READ MORE

May 20 in Blockchain by John
 • 463 views
0 votes
0 answers

Corda - How to check if counter party nodes are running?

0 I have build a CorDapp using "Yo!CorDapp" ...READ MORE

May 28 in Blockchain by Sriram
 • 160 points • 64 views
0 votes
1 answer

What is the use of role when registering user in Hyperledger Fabric

When you register a user, that user ...READ MORE

May 2 in Blockchain by Raj
 • 1,106 views
0 votes
0 answers

Corda - How to check if counter party nodes are running?

I have build a CorDapp using "Yo!CorDapp" ...READ MORE

May 27 in Blockchain by Sriram
 • 160 points • 27 views
0 votes
1 answer

Multichain installation error

Please follow the below steps to install ...READ MORE

May 22 in Blockchain by Wasim
 • 29 views
0 votes
0 answers

What will happen to the transactions with unconsumed states when modified contract is integrated in the network?

I have build a CorDapp using "Yo!CorDapp" ...READ MORE

May 22 in Blockchain by Sriram
 • 160 points • 54 views
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