Most viewed questions in Blockchain

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1 answer

repository hyperledger/fabric-tools not found: does not exist or no pull access

You can manually pull this (and any ...READ MORE

Jul 3, 2018 in Blockchain by charlie_brown
 • 7,720 points • 1,469 views
0 votes
2 answers

How can I make transactions to a blockchain from a remote device(like a cell phone)?

You can do this by developing a ...READ MORE

Jun 27, 2018 in Blockchain by Omkar
 • 69,180 points • 1,468 views
0 votes
1 answer

How can merkle trees help validate the content of a block in a blockchain

As long as they are centralized entities ...READ MORE

Feb 28, 2022 in Blockchain by Soham
 • 9,730 points • 1,467 views
0 votes
0 answers

Solidity: How i can return data from hash value ?

I have a solidity contract with two ...READ MORE

Feb 14, 2020 in Blockchain by simone
 • 120 points • 1,467 views
+1 vote
1 answer

Where is the Open API Specification generated by composer-rest-server stored in a Hyperledger Composer?

By default, the docs are at your ...READ MORE

Mar 26, 2018 in Blockchain by Christine
 • 15,750 points • 1,467 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 • 1,466 views
0 votes
1 answer

How to use a chaincode that's not on github?

There are two options: If you are not ...READ MORE

Aug 3, 2018 in Blockchain by charlie_brown
 • 7,720 points • 1,466 views
0 votes
1 answer

Bitcoin blockchain rookie question: how is nonce (the secret number added to each block) generated?

It isn't a secret number but it's ...READ MORE

Apr 7, 2022 in Blockchain by Aditya
 • 7,680 points • 1,465 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
 • 29,370 points • 1,465 views
0 votes
1 answer

Hyperledger Fabric SDK Design/Role of the application

When invoking functions, it has to be ...READ MORE

Nov 6, 2018 in Blockchain by Perry
 • 17,100 points • 1,464 views
+1 vote
1 answer

Node.js blockchain bitcoin api

The callback URL should be the one ...READ MORE

Sep 10, 2018 in Blockchain by slayer
 • 29,370 points • 1,464 views
0 votes
1 answer

Understanding Hyperledger transaction verification

 HL v0.x, the consensus process 'validates' transactions ...READ MORE

Jun 7, 2018 in Blockchain by Christine
 • 15,750 points • 1,464 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
 • 69,180 points • 1,462 views
0 votes
1 answer

Cant connect Jsonrpc to bitcoin.

I tried the following code and it ...READ MORE

Aug 20, 2018 in Blockchain by digger
 • 26,740 points • 1,462 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 • 1,462 views
0 votes
1 answer

How to write the Bitcoin logo as text?

Create a string in strings.xml like the ...READ MORE

Apr 12, 2022 in Blockchain by Aditya
 • 7,680 points • 1,461 views
+1 vote
1 answer

How to store state data in Ethereum blockchain?

You won't have to overwrite the whole ...READ MORE

Apr 25, 2018 in Blockchain by Shashank
 • 10,400 points • 1,461 views
0 votes
1 answer

Base58 encoding in ruby?

Seems like a hexadecimal number is stuck ...READ MORE

Aug 22, 2018 in Blockchain by digger
 • 26,740 points • 1,460 views
0 votes
1 answer

How to add Bitcoin as currency for my website?

You cannot use BTC as the currency ...READ MORE

Aug 17, 2018 in Blockchain by slayer
 • 29,370 points • 1,458 views
0 votes
1 answer

blockchain consensus 51% vs number of nodes validation

51% is an attack vector for Proof ...READ MORE

Apr 7, 2022 in Blockchain by Aditya
 • 7,680 points • 1,457 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 • 1,457 views
0 votes
1 answer

How do I add multiple recipients for transactions via Blockchain API?

Convert the recipes into JSON objects. x = ...READ MORE

Jul 6, 2018 in Blockchain by Perry
 • 17,100 points • 1,457 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 11, 2022 in Blockchain by Rahul
 • 9,690 points • 1,456 views
0 votes
2 answers

Coinbase-php createButton() throws 401 error

I found the explanation for this on ...READ MORE

Aug 30, 2018 in Blockchain by Naman
 • 1,456 views
+1 vote
1 answer

Is it possible to exchange the token for other tokens we create in an Ethereum Smart Contract?

Yes you can do that through something ...READ MORE

Aug 10, 2018 in Blockchain by Perry
 • 17,100 points • 1,456 views
0 votes
1 answer

Symmetric key in cryptography

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

Jun 20, 2019 in Blockchain by Firoz
 • 1,455 views
0 votes
1 answer

How to control a malicious user in hyperledger fabric?

Fabric is an implementation of blockchain. Blockchain ...READ MORE

Jun 29, 2018 in Blockchain by Omkar
 • 69,180 points • 1,454 views
0 votes
1 answer

REQUEST_TIMEOUT when instantiating my mart contarct on IBM blockchain Hyperledger Fabric network IBM. VS CODE is used for Hyperledger Fabric network

 If you're seeing a REQUEST_TIMEOUT error it's ...READ MORE

Apr 12, 2022 in Blockchain by Soham
 • 9,730 points • 1,453 views
0 votes
1 answer

Bitminter shows no progress but my system heated up and shutdown

After initialization of bitminter you won't be ...READ MORE

Jan 3, 2019 in Blockchain by Omkar
 • 69,180 points • 1,453 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 • 1,453 views
0 votes
1 answer

Hyperledger Fabric: How to convert channel.tx artifact into json?

You can use configtxgen to do this: configtxgen ...READ MORE

Nov 8, 2018 in Blockchain by Omkar
 • 69,180 points • 1,448 views
0 votes
1 answer

How to remove the previous BlockChain data?

One of the reasons preventing the blockchain ...READ MORE

Jul 3, 2018 in Blockchain by Omkar
 • 69,180 points • 1,448 views
0 votes
1 answer

Javascript mBTC to BTC conversion not working

At the beginning of bitcoinConversion() you have: if (currentUnit != ...READ MORE

Sep 5, 2018 in Blockchain by slayer
 • 29,370 points • 1,446 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, 2019 in Blockchain by Will
 • 1,445 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 • 1,444 views
+1 vote
1 answer

How do i change the names of validating peers in IBM Bluemix blockchain?

IBM Bluemix Blockchain service Hyperledger Fabric v0.6 will ...READ MORE

Apr 11, 2018 in Blockchain by Perry
 • 1,443 views
0 votes
1 answer

Testrpc can't find log handlers

This doesn't usually happen, maybe the log ...READ MORE

Jan 18, 2019 in Blockchain by Omkar
 • 69,180 points • 1,442 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 • 1,442 views
0 votes
1 answer

Geth console can’t access smart contract

You are running commands using an object ...READ MORE

Jan 27, 2019 in Blockchain by Omkar
 • 69,180 points • 1,441 views
0 votes
1 answer

How to proceed after connecting with hardcoded node?

I am assuming that by hardcoded nodes ...READ MORE

Aug 28, 2018 in Blockchain by Perry
 • 17,100 points • 1,439 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 • 1,436 views
0 votes
1 answer

How to transact custom token instead of ethers using JSON rpc?

First create your custom token. Then develop ...READ MORE

Jul 10, 2018 in Blockchain by digger
 • 26,740 points • 1,433 views
0 votes
1 answer

How to change default rpc port in Multichain?

You can use a different port. When ...READ MORE

Mar 1, 2019 in Blockchain by Omkar
 • 69,180 points • 1,432 views
0 votes
1 answer

Generating cryptocoin address.

30 in decimal will give you a ...READ MORE

Aug 23, 2018 in Blockchain by slayer
 • 29,370 points • 1,432 views
0 votes
1 answer

Hyperledger-Fabric Endorsement Policy: What are Members and Admins?

The goal of endorsement policy to set ...READ MORE

Jul 13, 2018 in Blockchain by Christine
 • 15,750 points • 1,432 views
0 votes
1 answer

Ethereum Studio: Can't find Sandbox

The GitHub project site says that the image is ...READ MORE

Jul 20, 2018 in Blockchain by Christine
 • 15,750 points • 1,431 views
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
 • 69,180 points • 1,431 views
0 votes
1 answer

Error using Santiment sanpy library for cryptocurrency data analysis

This is a great start, but I ...READ MORE

Apr 11, 2022 in Blockchain by Soham
 • 9,730 points • 1,428 views
0 votes
1 answer

What happens to the short chain when the nodes follow the long chain?

This situation occurs every day in the ...READ MORE

Jul 16, 2018 in Blockchain by digger
 • 26,740 points • 1,428 views
0 votes
1 answer

Encoding integers in solidity

There are different ways to do this ...READ MORE

Aug 13, 2018 in Blockchain by digger
 • 26,740 points • 1,427 views
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