Trending questions in Blockchain

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Passing hash string with smart contracts

eth.sendTransaction is a go etherum function. There more ...READ MORE

Jul 5, 2018 in Blockchain by slayer
 • 29,370 points • 1,453 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 • 1,143 views
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1 answer

What is the maximum number of nodes in corda?

No, there is no restriction of he ...READ MORE

Jul 11, 2018 in Blockchain by slayer
 • 29,370 points • 1,180 views
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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 • 1,135 views
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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 • 569 views
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 • 1,531 views
0 votes
1 answer

How to solve "error trying install composer runtime" in Hyperledger composer?

I think the docker-compose tool is not ...READ MORE

Jul 17, 2018 in Blockchain by slayer
 • 29,370 points • 896 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 • 632 views
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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
 • 29,370 points • 632 views
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1 answer

How to retrieve complete world state of hyperledger?

you can achieve this by iteration process ...READ MORE

Jul 5, 2018 in Blockchain by slayer
 • 29,370 points • 1,394 views
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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 • 714 views
0 votes
1 answer

Error: Error trying to ping. Error: Error trying to query business network. Error: Connect Failed

Run the following commandbefore updating: composer network start ...READ MORE

Jun 28, 2018 in Blockchain by Perry
 • 17,100 points • 1,675 views
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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 • 578 views
0 votes
1 answer

Getting error when i execute ./byfn.sh -m up command.

The error is caused because you're trying ...READ MORE

Jul 12, 2018 in Blockchain by slayer
 • 29,370 points • 1,068 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
 • 15,790 points • 1,016 views
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1 answer

Transaction Id in Bitcoin Blockchain

The TransactionId comes from sending the coin. ...READ MORE

Jul 13, 2018 in Blockchain by Christine
 • 15,790 points • 1,013 views
0 votes
1 answer

What if I change Chaincode state in invokeChaincode?

The chaincode state is not changed when ...READ MORE

Jul 13, 2018 in Blockchain by slayer
 • 29,370 points • 1,013 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 • 573 views
0 votes
1 answer

Unable to request channel creation using Rest Api

I'd recommend taking a look at the ordering ...READ MORE

Jul 16, 2018 in Blockchain by Perry
 • 17,100 points • 873 views
0 votes
1 answer

Can someone help me conceptualizing blockchain for supply chain demo?

I think you should take a step ...READ MORE

Jul 17, 2018 in Blockchain by Shashank
 • 10,400 points • 816 views
0 votes
1 answer

Çannot implement web3.eth.subscribe on Web3 version 1.0.0-beta.27

As the error suggests, pub/sub is not ...READ MORE

Jun 19, 2018 in Blockchain by Perry
 • 17,100 points
edited Jun 19, 2018 by Perry • 2,023 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 • 764 views
0 votes
1 answer

how to learn writing java code for Hyperledger Fabric?

You can learning writing java codes for ...READ MORE

Jul 10, 2018 in Blockchain by slayer
 • 29,370 points • 1,108 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
 • 29,370 points • 490 views
0 votes
1 answer

How to send chaincode error to the calling application?

To pass message all the way to ...READ MORE

Jul 6, 2018 in Blockchain by digger
 • 26,740 points • 1,263 views
0 votes
1 answer

Include real world data in smart contract

What you are looking for is an ...READ MORE

Jul 11, 2018 in Blockchain by Shashank
 • 10,400 points • 1,040 views
0 votes
1 answer

How to update data in Corda?

Yes, in corda you can store data ...READ MORE

Jul 11, 2018 in Blockchain by digger
 • 26,740 points • 1,039 views
+1 vote
2 answers

How do I access the api generated by hyperledger composer publicly?

IBM Bluemix is a platform that provides ...READ MORE

Jul 5, 2018 in Blockchain by slayer
 • 29,370 points • 1,253 views
0 votes
1 answer

Geth 'sendTransaction' not working

When transactions are put in a loop, ...READ MORE

Jul 3, 2018 in Blockchain by Omkar
 • 69,220 points • 1,373 views
0 votes
1 answer

jQuery/ajax - two separate API requests with combined results

You can move the second ajax call ...READ MORE

Jun 19, 2018 in Blockchain by aryya
 • 7,460 points • 1,981 views
0 votes
1 answer

How to create tokens in smart contracts from node.js?

Any modification to the Ethereum Blockchain will ...READ MORE

Jun 27, 2018 in Blockchain by Shashank
 • 10,400 points • 1,665 views
0 votes
1 answer

How to write a program to get details of ERC tokens?

You can use Javascript with the Metamask ...READ MORE

Jul 13, 2018 in Blockchain by slayer
 • 29,370 points • 943 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 • 1,072 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 • 1,102 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
 • 7,460 points • 648 views
0 votes
1 answer

How to solve Corda Node Startup Exception?

The error says "port may be in ...READ MORE

Jul 13, 2018 in Blockchain by digger
 • 26,740 points • 921 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
 • 7,460 points • 658 views
0 votes
1 answer

What exactly is BigChainDB?

Technically, BigChainDB internally uses RethinkDB as a ...READ MORE

Jul 11, 2018 in Blockchain by Shashank
 • 10,400 points • 999 views
0 votes
1 answer

How can I create multiple connection profiles and multiple nodes in hyperledger composer?

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

Jul 11, 2018 in Blockchain by Shashank
 • 10,400 points • 996 views
0 votes
1 answer

Is it possible to claim Bitcoin Cash from an exchange that does not support it?

You can't claim BCH without knowing private ...READ MORE

Jul 17, 2018 in Blockchain by aryya
 • 7,460 points • 738 views
0 votes
1 answer

How are unique public address generated in bitcoin?

In brief, the public addresses are generated ...READ MORE

Jul 16, 2018 in Blockchain by slayer
 • 29,370 points • 771 views
0 votes
1 answer

Hyperledger remove asset

Data on a blockchain won't ever be ...READ MORE

Jul 4, 2018 in Blockchain by Christine
 • 15,790 points • 1,319 views
0 votes
1 answer

How read-write sets is used in hyperledger?

In Hyperledger, read-write sets are used during ...READ MORE

Jul 3, 2018 in Blockchain by digger
 • 26,740 points • 1,326 views
0 votes
1 answer

Blockchain Python Syntax Error

Look here:  print('Block #{} has been added to ...READ MORE

Jul 13, 2018 in Blockchain by Christine
 • 15,790 points • 887 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
 • 1,104 views
0 votes
1 answer

What is the peer node start in hyperledger?

Nodes are the fundamental element of the ...READ MORE

Jul 9, 2018 in Blockchain by digger
 • 26,740 points • 1,042 views
0 votes
1 answer

Where is the data stored in blockchain?

The smart contract is just the business ...READ MORE

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

Can we store encrypted data into transaction?

Ethereum can store whatever bytes you want, ...READ MORE

Jul 17, 2018 in Blockchain by Christine
 • 15,790 points • 669 views
0 votes
1 answer

Updating data of struct to save in chaincode.

You can use a code similar to ...READ MORE

Jul 5, 2018 in Blockchain by slayer
 • 29,370 points • 1,199 views
0 votes
1 answer

How to handle memory and processor limitations of nodes in blockchain?

Yes, that's a valid concern. The Bitcoin ...READ MORE

Jul 14, 2018 in Blockchain by Shashank
 • 10,400 points • 836 views
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