Latest questions in Blockchain

0 votes
1 answer

"const is reserved" parse error.

It could be an error because of ...READ MORE

Jul 6, 2018 in Blockchain by slayer
 • 29,370 points • 2,035 views
0 votes
1 answer

Use of command : ./teardownFabric.sh

Note that if you've run the teardown ...READ MORE

Jul 6, 2018 in Blockchain by Perry
 • 17,100 points • 1,122 views
0 votes
1 answer

How can i copy block aspects in hyperledger fabric?

There are three ways you can do ...READ MORE

Jul 6, 2018 in Blockchain by digger
 • 26,740 points • 1,316 views
0 votes
1 answer

REQUEST_TIMEOUT error in Hyperledger Fabric, Linux

My docker version was 1.7. And its ...READ MORE

Jul 6, 2018 in Blockchain by Christine
 • 15,750 points • 3,319 views
0 votes
2 answers

Where can i find Hyperledger Fabric Node SDK sample application?

Here are some links where you can ...READ MORE

Apr 26, 2019 in Blockchain by Firoz
 • 3,949 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 • 1,593 views
0 votes
1 answer

IRS demo Scheduled Event - InitiationHandler

The TODO you are looking for has ...READ MORE

Jul 6, 2018 in Blockchain by slayer
 • 29,370 points • 952 views
0 votes
1 answer

Generic put and get in hyperledger fabric

For this, you have to write a ...READ MORE

Jul 6, 2018 in Blockchain by digger
 • 26,740 points • 964 views
0 votes
1 answer

Error connecting due to rpc error

In the previous version, this problem was ...READ MORE

Jul 6, 2018 in Blockchain by slayer
 • 29,370 points • 1,126 views
0 votes
1 answer

How to define different privacy for different users in Fabric 1.0?

The privacy restriction to particular peers in ...READ MORE

Jul 6, 2018 in Blockchain by digger
 • 26,740 points • 977 views
0 votes
1 answer

Cant decode hex sting into decimal. Getting TypeError.

On the line where it shows error, ...READ MORE

Jul 6, 2018 in Blockchain by slayer
 • 29,370 points • 5,397 views
0 votes
1 answer

Send Payment error in Blockchain API

The following code should help: $address = null; try ...READ MORE

Jul 6, 2018 in Blockchain by Perry
 • 17,100 points • 2,252 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 • 1,435 views
0 votes
1 answer

How to test endorsement policy for the business network in multiple organizations

Give the proposal responses you are receiving ...READ MORE

Jul 6, 2018 in Blockchain by aryya
 • 7,460 points • 1,459 views
+1 vote
4 answers

Where does hyperledger fabric store the database for the blockchain?

The data of the Hyperledger Blockchain is ...READ MORE

Apr 29, 2019 in Blockchain by Tina
 • 3,548 views
0 votes
0 answers

Identification of purchased product

I have created coins on test network.Now ...READ MORE

Jul 6, 2018 in Blockchain by charlie_brown
 • 7,720 points • 677 views
0 votes
1 answer

How to prevent the smart contract from being modified and deployed in the blockchain network?

To expand on Matthew's answer, each state ...READ MORE

Jul 6, 2018 in Blockchain by aryya
 • 7,460 points • 1,196 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
 • 7,460 points • 1,561 views
0 votes
1 answer

How to create a ‘feeless’ ERC20 token?

You can't have another address pay for ...READ MORE

Jul 6, 2018 in Blockchain by aryya
 • 7,460 points • 1,415 views
0 votes
1 answer

how can i convert stub.GetTxTimestamp() to type string?

You can not directly convert the timestamp ...READ MORE

Jul 5, 2018 in Blockchain by digger
 • 26,740 points • 1,952 views
0 votes
1 answer

"set RNG(RandomUtils.Random) before generating random numbers" error

Use the following code, you just have ...READ MORE

Jul 5, 2018 in Blockchain by slayer
 • 29,370 points • 1,243 views
0 votes
1 answer

IBM Blockchain cant retrieving multiple rows from table

You can not use the older implementation ...READ MORE

Jul 5, 2018 in Blockchain by digger
 • 26,740 points • 1,064 views
0 votes
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 • 1,764 views
0 votes
1 answer

difference between running docker image in and outside of vagrant

Most people recommend to run docker containers ...READ MORE

Jul 5, 2018 in Blockchain by digger
 • 26,740 points • 1,087 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 • 1,609 views
0 votes
1 answer

How is consensus reached when there are only two peers in Hyperledger Fabric?

The consensus is achieved in the ordering ...READ MORE

Jul 5, 2018 in Blockchain by digger
 • 26,740 points • 2,386 views
0 votes
1 answer

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 • 1,785 views
0 votes
1 answer

"could not find test.properties" error in Hyperledger v1.0

There is no java sdk for your ...READ MORE

Jul 5, 2018 in Blockchain by digger
 • 26,740 points • 1,168 views
0 votes
0 answers

Blockchain.info wallet API callback

I am implementing blockchain.info wallet api to ...READ MORE

Jul 4, 2018 in Blockchain by sabby
 • 4,370 points • 1,209 views
0 votes
1 answer

Hyperledge fabric v0.6 querying states between a period range

The Hyperledge fabric v0.6 does not provide ...READ MORE

Jul 4, 2018 in Blockchain by digger
 • 26,740 points • 1,201 views
0 votes
1 answer

How would I run SpringBoot with the Java-SDK of Hyperledger Fabric java daemon?

I am not familiar with SpringBoot, but ...READ MORE

Jul 4, 2018 in Blockchain by aryya
 • 7,460 points • 2,772 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 • 1,788 views
0 votes
1 answer

How to make transactions without creating assets in multichain?

To transfer your Mycoins, you can make ...READ MORE

Jul 3, 2018 in Blockchain by Omkar
 • 69,180 points • 1,002 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
 • 69,180 points • 1,708 views
0 votes
1 answer

Network issue while testing Chaincode.

You can do the following things: You can ...READ MORE

Jul 3, 2018 in Blockchain by Omkar
 • 69,180 points • 1,055 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 • 1,748 views
0 votes
1 answer

How blocks are linked in the Hyperledger Fabric blockchain?

The structure of block in Hyperledger Fabric ...READ MORE

Jul 3, 2018 in Blockchain by Omkar
 • 69,180 points • 2,017 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 • 1,427 views
0 votes
1 answer

How ordering nodes synchronize work?

To prevent time-based retention and prevent expiring ...READ MORE

Jul 3, 2018 in Blockchain by Omkar
 • 69,180 points • 1,024 views
0 votes
1 answer

How to change "gasLimit" on Azure private blockchain?

Before deploying your network on Azure you ...READ MORE

Jul 3, 2018 in Blockchain by Omkar
 • 69,180 points • 1,147 views
0 votes
1 answer

In Hyperledger fabric, how does committer validate the transaction?

Endorsing and committing are just two functions ...READ MORE

Jul 3, 2018 in Blockchain by Omkar
 • 69,180 points • 1,621 views
0 votes
1 answer

Who is miners in smart contracts?

Proof of work is used as a ...READ MORE

Jul 3, 2018 in Blockchain by Omkar
 • 69,180 points • 1,293 views
0 votes
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 • 1,452 views
0 votes
1 answer

Blockchain/decentralized apps development intro

If you are looking for books. If ...READ MORE

Jul 3, 2018 in Blockchain by charlie_brown
 • 7,720 points • 871 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 • 2,013 views
0 votes
1 answer

How can I use IBM blockchain to store data?

I would recommend looking at the Fabric ...READ MORE

Jul 3, 2018 in Blockchain by charlie_brown
 • 7,720 points • 1,404 views
0 votes
1 answer

How to hold back KYC reward until the end of the ICO Crowdsale?

Your contract contains two functions - the payable function which ...READ MORE

Jul 4, 2018 in Blockchain by Christine
 • 15,750 points • 1,059 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
 • 15,750 points • 1,663 views
0 votes
1 answer

Hyperledger Fabric peer command not found error.

This error occurs when the system can ...READ MORE

Jul 2, 2018 in Blockchain by Omkar
 • 69,180 points • 4,397 views
0 votes
1 answer

Hyperledger Fabric 1.0 how to maintain privacy from OSNs?

Yes, OSNs can see all the transaction ...READ MORE

Jul 2, 2018 in Blockchain by Omkar
 • 69,180 points • 1,345 views
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