Most voted questions in Blockchain

0 votes
1 answer

Efficiently sorting Ethereum blockchain.

What you are trying to do is ...READ MORE

Jul 25, 2018 in Blockchain by slayer
 • 29,350 points • 603 views
0 votes
1 answer

Zip attachment in Corda: How to read zip file using InputStream?

You can not directly read the content ...READ MORE

Jul 25, 2018 in Blockchain by digger
 • 26,740 points • 992 views
0 votes
1 answer

Mining on private Ethereum blockchain

You control how miners work on your ...READ MORE

Jul 25, 2018 in Blockchain by Johnathon
 • 9,090 points • 734 views
0 votes
1 answer

How to solve “More than one instance of bitcore-lib found” error?

There is a temp solution here. ~/bitcore-explorers/node_modules/bitcore-lib/index.js line 7: bitcore.versionGuard ...READ MORE

Jul 25, 2018 in Blockchain by slayer
 • 29,350 points • 2,003 views
0 votes
1 answer

Error while adding participant to local application.

Do the following to solve the problem composer ...READ MORE

Jul 25, 2018 in Blockchain by digger
 • 26,740 points • 259 views
0 votes
1 answer

What is the process to Create Cryptocurrency for ICO?

No, you don’t have to issue the ...READ MORE

Jul 25, 2018 in Blockchain by slayer
 • 29,350 points • 471 views
0 votes
1 answer

Is {from: thesponsor, value: 10000000, gas: 3000000} considered as a transaction object?

Yes, {from: thesponsor, value: 10000000, gas: 3000000} ...READ MORE

Jul 25, 2018 in Blockchain by digger
 • 26,740 points • 314 views
0 votes
1 answer

Differences between the composer network and composer identity

For permissions, you can read about the ...READ MORE

Jul 25, 2018 in Blockchain by Johnathon
 • 9,090 points • 305 views
0 votes
1 answer

How to connect a NS3 node to my local blockchain?

To connect all your nodes with all ...READ MORE

Jul 25, 2018 in Blockchain by digger
 • 26,740 points • 1,866 views
0 votes
1 answer

Cannot download nvm install v.8.9.1 version - clang checksum do not match, sed issue

Try a clean install of node again npm ...READ MORE

Jul 25, 2018 in Blockchain by charlie_brown
 • 7,720 points • 1,901 views
0 votes
1 answer

How to send ethers to a contract?

Transfer of tokens means you will deduct ...READ MORE

Jul 25, 2018 in Blockchain by charlie_brown
 • 7,720 points • 308 views
0 votes
1 answer

Trying to setup a hyperledger but REST API is throwing error

Not sure if you are still looking ...READ MORE

Jul 25, 2018 in Blockchain by aryya
 • 7,450 points • 342 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
 • 7,450 points • 987 views
0 votes
1 answer

Looking for a simple Blockchain PoC to implement on a office level

Hyperledger has been collecting some use cases, though not ...READ MORE

Jul 24, 2018 in Blockchain by aryya
 • 7,450 points • 520 views
0 votes
1 answer

Why visual studio 2015 can not open blockchain api project on github

If you look in the solution file ...READ MORE

Jul 24, 2018 in Blockchain by aryya
 • 7,450 points • 303 views
0 votes
1 answer

Display the state information to a list of participants dynamically.

There might be a bug in your ...READ MORE

Jul 24, 2018 in Blockchain by Christine
 • 15,790 points • 270 views
0 votes
1 answer

eth.getBalance() always returns 0 in testnet

You are not connecting to the right ...READ MORE

Jul 24, 2018 in Blockchain by Christine
 • 15,790 points • 1,916 views
0 votes
1 answer

Can we create a hyperledger fabric with peers from different platforms?

Yes, it is possible. Peers from different ...READ MORE

Jul 24, 2018 in Blockchain by slayer
 • 29,350 points • 241 views
0 votes
2 answers

How is a transaction public key related to original public?

The details like account balance, nonce etc., ...READ MORE

Jul 24, 2018 in Blockchain by digger
 • 26,740 points • 333 views
0 votes
1 answer

Can i transfer Kraken to Poloniex?

You can use withdrawFunds method from the ...READ MORE

Jul 24, 2018 in Blockchain by slayer
 • 29,350 points • 462 views
0 votes
1 answer

Can a hyperledger composer work without fabric installed?

The pre-requisites section of hyperledger composer explains ...READ MORE

Jul 24, 2018 in Blockchain by digger
 • 26,740 points • 327 views
0 votes
2 answers

Why is getTransactionReceipt() returning None (NoneType object)?

If you want to know more about ...READ MORE

Sep 11, 2020 in Blockchain by pythoncourse
 • 140 points • 692 views
0 votes
1 answer

How proof work prevents rebuilding of blockchain?

POS has the same idea as POW. ...READ MORE

Jul 24, 2018 in Blockchain by Shashank
 • 10,400 points • 245 views
0 votes
1 answer

how can I save my nodejs blockchain??

point 1 and 2 are not immune ...READ MORE

Jul 24, 2018 in Blockchain by Shashank
 • 10,400 points • 282 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 • 739 views
0 votes
1 answer

npm hfc@0.6.2 not properly installing

this is harmless, the hfc module should ...READ MORE

Jul 24, 2018 in Blockchain by charlie_brown
 • 7,720 points • 481 views
0 votes
1 answer

How to return data on execution of invoke function?

You can do this using a response ...READ MORE

Jul 23, 2018 in Blockchain by digger
 • 26,740 points • 298 views
0 votes
1 answer

Can I make my smart contract private in Quorum?

Yes, it is possible. You can look ...READ MORE

Jul 23, 2018 in Blockchain by slayer
 • 29,350 points • 1,209 views
0 votes
1 answer

What is sent to a non-validating notary service when corda transaction is sent?

The transaction is first filtered in the ...READ MORE

Jul 23, 2018 in Blockchain by digger
 • 26,740 points • 620 views
0 votes
1 answer

How to check history of blockchain.info wallet?

In the link you mentioned(https://blockchain.info/q), there are ...READ MORE

Jul 23, 2018 in Blockchain by slayer
 • 29,350 points • 1,180 views
0 votes
1 answer

Not able to deploy smart contract on testrpc.

I attached to geth using the following ...READ MORE

Jul 23, 2018 in Blockchain by digger
 • 26,740 points • 324 views
0 votes
1 answer

How to track changes of an object in exonum?

You have to describe each component in ...READ MORE

Jul 23, 2018 in Blockchain by slayer
 • 29,350 points • 294 views
0 votes
1 answer

Hyperledger Fabric CA "Failed to get user: User not found"

The problem could be because of the ...READ MORE

Jul 23, 2018 in Blockchain by digger
 • 26,740 points • 1,875 views
0 votes
1 answer

Do we require a specific condition when working with indices on solidity?

Your code is written correctly. require is intended to ...READ MORE

Jul 23, 2018 in Blockchain by Perry
 • 17,100 points • 243 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 • 735 views
0 votes
1 answer

How can I build a hexadecimal block if I have all the needed information?

Here you have some articles about bitcoin ...READ MORE

Jul 21, 2018 in Blockchain by Christine
 • 15,790 points • 442 views
0 votes
1 answer

How should I set my mac to install "hyperledger composer playground locally" ?

Install the pre-reqs https://hyperledger.github.io/composer/in ...READ MORE

Jul 21, 2018 in Blockchain by Christine
 • 15,790 points • 552 views
0 votes
1 answer

Hyperledger Composer error in transaction

Check that you have declare the function ...READ MORE

Jul 21, 2018 in Blockchain by shweta
 • 440 points • 427 views
0 votes
1 answer

How to display State Information to a list of participants dynamically?

The if condition mentioned below will never ...READ MORE

Jul 23, 2018 in Blockchain by Omkar
 • 69,190 points • 386 views
0 votes
1 answer

How to send Bitcoins with node.js?

This website https://blockr.io/tx/push will successfully do the bitcoin transaction. You ...READ MORE

Jul 20, 2018 in Blockchain by Christine
 • 15,790 points • 2,554 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
 • 15,790 points • 396 views
0 votes
3 answers

Hyperledger fabcar sample fabric error: sendPeersProposal - Promise is rejected: Error: Connect Failed

Open the datasources.json file and replace the grpcs:// with grpc://. This solution worked ...READ MORE

Apr 30, 2019 in Blockchain by Reshma
 • 2,062 views
0 votes
1 answer

How does the consensus happen in Saas based blockchain application?

I will be maintaining the database at ...READ MORE

Jul 20, 2018 in Blockchain by aryya
 • 7,450 points • 274 views
0 votes
1 answer

How to setup rule in ACL file of Hyperledger Composer to validate against enum?

Use these two ACL rules: ...READ MORE

Jul 19, 2018 in Blockchain by Perry
 • 17,100 points • 1,039 views
0 votes
1 answer

How to retrieve data from an Ethereum Block?

To get transaction details like Block Hash ...READ MORE

Jul 19, 2018 in Blockchain by Perry
 • 17,100 points • 2,174 views
0 votes
1 answer

Which is the best decentralized storage apps?

IPFS is a protocol for a distributed ...READ MORE

Jul 19, 2018 in Blockchain by aryya
 • 7,450 points • 308 views
0 votes
1 answer

Why hyperledger REST server has PUT method?

Actually, with the PUT method, you don't ...READ MORE

Jul 19, 2018 in Blockchain by aryya
 • 7,450 points • 228 views
0 votes
1 answer

How can I change endorsement policies in hyperledger?

Well the good news is that it ...READ MORE

Jul 19, 2018 in Blockchain by Johnathon
 • 9,090 points • 786 views
0 votes
1 answer

How do I get the total amount sent to an address?

If you are using web3JS you can ...READ MORE

Jul 19, 2018 in Blockchain by Johnathon
 • 9,090 points • 458 views
0 votes
1 answer

How to change Endorsement policies

Well the good news is that it ...READ MORE

Jul 18, 2018 in Blockchain by charlie_brown
 • 7,720 points • 300 views
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