Latest questions in Blockchain

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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
 • 29,350 points • 860 views
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1 answer

How to check payment in Blockchain.info wallet?

The above error is probably occurring due ...READ MORE

Aug 21, 2018 in Blockchain by Perry
 • 17,100 points • 950 views
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1 answer

Blockchain peer not able to min block in Azure.

After trying out various ideas, making sure ...READ MORE

Aug 21, 2018 in Blockchain by Perry
 • 17,100 points • 376 views
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1 answer

How to create Quorum rawTransaction?

Unfortunately this capability is not currently supported ...READ MORE

Aug 17, 2018 in Blockchain by Shashank
 • 10,400 points • 588 views
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1 answer

Where is query displayed in Hyperledger?

Composer configures the named queries for a ...READ MORE

Aug 17, 2018 in Blockchain by Shashank
 • 10,400 points • 609 views
0 votes
1 answer

Solidity invalid opcode error

In the for loop, your indexing going ...READ MORE

Aug 16, 2018 in Blockchain by slayer
 • 29,350 points • 2,930 views
0 votes
1 answer

Solidity difference array with and without new keyword.

Creating arrays with variable length in memory ...READ MORE

Aug 16, 2018 in Blockchain by digger
 • 26,740 points • 1,461 views
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1 answer

How to get return value from solidity contract?

Once you call a constant function, you ...READ MORE

Aug 16, 2018 in Blockchain by slayer
 • 29,350 points • 4,786 views
0 votes
1 answer

Function not working from class

Try this code:  // Add new block ...READ MORE

Aug 16, 2018 in Blockchain by digger
 • 26,740 points • 441 views
0 votes
1 answer

How do I change default service names in Corda Demobench?

Each Corda node individually advertises the services ...READ MORE

Aug 14, 2018 in Blockchain by Perry
 • 17,100 points • 571 views
0 votes
1 answer

Planning to deploy IBM bluemix fabric images on Docker, do I need Amazon ECS or EC2 instances?

Bluemix has an excellent documentation which provides ...READ MORE

Aug 14, 2018 in Blockchain by Perry
 • 17,100 points • 511 views
0 votes
1 answer

What files are supported by BigchainDB?

BigchainDB supports .json file format. It can ...READ MORE

Feb 26, 2019 in Blockchain by anonymous
 • 452 views
0 votes
2 answers

Python syntax error because of version conflicts.

As mentioned in the reply to my ...READ MORE

Aug 13, 2018 in Blockchain by Omkar
 • 69,230 points • 990 views
0 votes
1 answer

How to get return value of external function?

You can do this. I have shared ...READ MORE

Aug 13, 2018 in Blockchain by digger
 • 26,740 points • 1,685 views
0 votes
1 answer

How to call smart contract methods from transactions?

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

Aug 13, 2018 in Blockchain by slayer
 • 29,350 points • 823 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 • 754 views
0 votes
1 answer

How to access member functions of smart contract using web3?

I have implemented a similar feature and ...READ MORE

Aug 13, 2018 in Blockchain by slayer
 • 29,350 points • 1,416 views
0 votes
1 answer

Why does Blockchain comes under Distributed Ledger Technology instead of being merely a replicated database?

1. Data in a database is generally subject ...READ MORE

Aug 10, 2018 in Blockchain by Christine
 • 15,790 points • 551 views
+1 vote
1 answer

How to create participant and there identities via rest API in Hyperledger Composer?

If you have already imported an Identity ...READ MORE

Aug 10, 2018 in Blockchain by Perry
 • 17,100 points • 2,247 views
0 votes
1 answer

How do I convert to Crystal ruby's multiple assignments of Array

When decomposing an Array into a multiple ...READ MORE

Aug 10, 2018 in Blockchain by Perry
 • 17,100 points • 605 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 • 674 views
0 votes
1 answer

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

Smart contracts can be definitive if they ...READ MORE

Aug 10, 2018 in Blockchain by Perry
 • 17,100 points • 501 views
0 votes
1 answer

How do transactions create a new block in Blockchain?

Bitcoin puts a cap of 2,400 transactions ...READ MORE

Aug 10, 2018 in Blockchain by Christine
 • 15,790 points • 1,544 views
0 votes
1 answer

Why do the resultant hash after mining has a leading no. of zeroes in Blockchain verification?

This is chosen by the DIFFICULTY EQUATION. In ...READ MORE

Aug 10, 2018 in Blockchain by Christine
 • 15,790 points • 3,323 views
0 votes
1 answer

How to explore and analyze the data inside a Hyperledger Blockchain network?

In Hyperledger Composer, you have all the ...READ MORE

Aug 10, 2018 in Blockchain by Christine
 • 15,790 points • 1,053 views
0 votes
1 answer

How to add https security for Node js?

You need to add the key and cert to the createServer function. const options ...READ MORE

Aug 10, 2018 in Blockchain by digger
 • 26,740 points • 543 views
0 votes
1 answer

How to create light wallet in Web3J?

You can use this method to create ...READ MORE

Aug 10, 2018 in Blockchain by slayer
 • 29,350 points • 1,849 views
0 votes
1 answer

Fatal error while installing web3 node.

Try to add git config by executing ...READ MORE

Aug 10, 2018 in Blockchain by digger
 • 26,740 points • 1,382 views
0 votes
1 answer

Problem with installing testrpc using python-pip.

You are facing this error because you ...READ MORE

Aug 10, 2018 in Blockchain by slayer
 • 29,350 points • 844 views
0 votes
1 answer

What does _ mean in solidity language?

The _ symbol is a place holder. ...READ MORE

Aug 10, 2018 in Blockchain by digger
 • 26,740 points • 2,383 views
0 votes
1 answer

How to use third party contract to send ERC token?

You can do it by using a ...READ MORE

Aug 10, 2018 in Blockchain by slayer
 • 29,350 points • 770 views
0 votes
1 answer

Truffle Error: Migrations contract constructor expected

You are not using constructor() public { ...READ MORE

Aug 10, 2018 in Blockchain by digger
 • 26,740 points • 1,404 views
0 votes
1 answer

Fabric-node-sdk 1.2 with Fabric 1.1

The line grpc-max-send-message-length: 15 is used to load ...READ MORE

Aug 10, 2018 in Blockchain by slayer
 • 29,350 points • 704 views
0 votes
1 answer

Hyperledger Sawtooth installation JAVA_HOME: path not found

/etc/environment is a bash script, so change the ...READ MORE

Aug 10, 2018 in Blockchain by digger
 • 26,740 points • 688 views
0 votes
1 answer

How can Blockchain be implemented for android development?

Essentially you need to understand what is ...READ MORE

Aug 10, 2018 in Blockchain by Johnathon
 • 9,090 points • 1,065 views
0 votes
1 answer

My first Hyperledger fabric network is not working

Delete as admin the channel-artifacts folder, down ...READ MORE

Aug 10, 2018 in Blockchain by Johnathon
 • 9,090 points • 1,656 views
+1 vote
1 answer

How do i add images in Hyperledger?

You can not directly add an image ...READ MORE

Aug 10, 2018 in Blockchain by Omkar
 • 69,230 points • 797 views
0 votes
1 answer

To capture events do we need to create assets using transaction processing functions?

I think you have figured it by ...READ MORE

Aug 10, 2018 in Blockchain by Christine
 • 15,790 points • 390 views
0 votes
1 answer

Solidity Error: Member "equal" is not available in type(library Assert) outside of storage

You can get error because solidity does ...READ MORE

Aug 9, 2018 in Blockchain by slayer
 • 29,350 points • 712 views
0 votes
2 answers

Truffle migrate gives “ Error: No network specified. ”

You have to mention on which network ...READ MORE

Aug 13, 2018 in Blockchain by Omkar
 • 69,230 points • 1,465 views
0 votes
1 answer

Ethereum wallet not able to make transaction

I can see that the nonce you ...READ MORE

Aug 9, 2018 in Blockchain by slayer
 • 29,350 points • 483 views
0 votes
1 answer

Hyperledger error while installing binaries

This seems like a problem with the ...READ MORE

Aug 9, 2018 in Blockchain by digger
 • 26,740 points • 1,473 views
0 votes
1 answer

How to create channels in Hyperledger Sawtooth?

There are two features that I know ...READ MORE

Aug 9, 2018 in Blockchain by slayer
 • 29,350 points • 1,932 views
0 votes
1 answer

Difference between Fabric Composer and Hyperledger Composer?

They are basically the same thing. Fabric ...READ MORE

Aug 9, 2018 in Blockchain by digger
 • 26,740 points • 1,080 views
0 votes
1 answer

Building Hyperledger Fabric Blockchain

To build your own app using Hyperledger ...READ MORE

Aug 9, 2018 in Blockchain by slayer
 • 29,350 points • 319 views
0 votes
2 answers

Using Hyperledger composer with Hyperledger Blockchain explorer.

I was facing the same issue and ...READ MORE

Aug 9, 2018 in Blockchain by digger
 • 26,740 points • 3,120 views
0 votes
2 answers

How to completely uninstall hyperledger composer?

You might have to uninstall/remove files from ...READ MORE

Aug 9, 2018 in Blockchain by slayer
 • 29,350 points • 4,675 views
0 votes
1 answer

Hyperledger Blockchain Explorer “'Error: no test specified' ” error

You have run the npm install command ...READ MORE

Aug 9, 2018 in Blockchain by digger
 • 26,740 points • 1,386 views
0 votes
1 answer

How do I get updates in every blockchain append?

If you are really want to get ...READ MORE

Aug 9, 2018 in Blockchain by aryya
 • 7,450 points • 485 views
0 votes
1 answer

How do I validate the presence of participant owner in Asset transfer transaction?

I found the exact solution and syntax.. ...READ MORE

Aug 9, 2018 in Blockchain by aryya
 • 7,450 points • 1,201 views
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