Trending questions in Blockchain

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Can we find out the bitcoin sender by their address?

It is not possible to find the ...READ MORE

Dec 3, 2018 in Blockchain by Omkar
• 67,620 points
81 views
0 votes
1 answer

Unboxing truffle: Shows error: Stopping to prevent overwriting data.

As mentioned in the error: unboxing or ...READ MORE

Nov 30, 2018 in Blockchain by Omkar
• 67,620 points
181 views
0 votes
1 answer

What is the mean Hash Encryption?

Hash encryption is a form of providing ...READ MORE

Dec 3, 2018 in Blockchain by Omkar
• 67,620 points
45 views
0 votes
1 answer

Should I encrypt my address before sending bitcoin?

Hey. No, you dont have to encrypt ...READ MORE

Dec 3, 2018 in Blockchain by Omkar
• 67,620 points
44 views
0 votes
1 answer

Ethereum "truffle server" gives error: TypeError: fsevents is not a constructor

Looks like you have files missing.  Try creating project with: truffle ...READ MORE

Nov 30, 2018 in Blockchain by Omkar
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148 views
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1 answer

Hyperledger fabric java sdk setup

Suppose (assuming) you started the first network ...READ MORE

Nov 16, 2018 in Blockchain by Christine
• 15,790 points
742 views
0 votes
1 answer

Ethereum truffle server command not working

Try this command to create project: truffle init ...READ MORE

Nov 29, 2018 in Blockchain by Omkar
• 67,620 points
145 views
+1 vote
4 answers

What is the asset, key-value pair in hyperledger fabric?

Let me explain with an example. Suppose ...READ MORE

May 2 in Blockchain by Kiran
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1 answer

Not able to migrate contract in Truffle: Error: No network specified. Cannot determine current network

Make these entries in truffle.js file: module.exports = { ...READ MORE

Nov 29, 2018 in Blockchain by Omkar
• 67,620 points
120 views
+1 vote
4 answers

How PBFT algorithm works?

PBFT is a way for a distributed ...READ MORE

Apr 25 in Blockchain by Kiran
1,659 views
0 votes
1 answer

Cant initialization project in truffle

Try this: truffle unbox webpack READ MORE

Nov 29, 2018 in Blockchain by Omkar
• 67,620 points
83 views
0 votes
1 answer

Not able to start testrpc for Ethereum truffle

Hey. It seems like you already have ...READ MORE

Nov 28, 2018 in Blockchain by Omkar
• 67,620 points
120 views
+1 vote
1 answer

Hyperledger Fabric: Got permission denied Docker daemon socket at unix:///var/run/docker.sock

You are getting this error probably because ...READ MORE

Nov 19, 2018 in Blockchain by Omkar
• 67,620 points
462 views
0 votes
1 answer

Hyperledger Fabric: Error: Error getting chaincode code chaincode: cannot find package

In the startFabric.sh launch the cli container ...READ MORE

Nov 12, 2018 in Blockchain by Omkar
• 67,620 points
813 views
+16 votes
4 answers

Why do only ADMIN users in Hyperledger Fabric have the permission to install query in chaincode?

It was already decided that installing chaincode ...READ MORE

Apr 3, 2018 in Blockchain by Perry
• 17,020 points
1,320 views
0 votes
1 answer

How to install chaincode in new Org in hyperledger fabric?

To do this, first enter you cli ...READ MORE

Nov 22, 2018 in Blockchain by Omkar
• 67,620 points
336 views
+1 vote
5 answers

Difference between internal-external, private-public in function

External: These functions are part of the ...READ MORE

Apr 7, 2018 in Blockchain by Shashank
• 10,350 points
1,537 views
0 votes
1 answer

What is my chaincode ID in Hyperledger Fabric?

Hey. You have used chaincode id but ...READ MORE

Nov 21, 2018 in Blockchain by Omkar
• 67,620 points
329 views
0 votes
2 answers

Laravel 5.4 to get data form API response

Input::get('var_name') READ MORE

Feb 14 in Blockchain by anonymous
269 views
0 votes
1 answer

"[RuntimeException] The "-t" option does not exist" error in Hyperledger composer.

This command runs on composer-cli. Have you ...READ MORE

Nov 21, 2018 in Blockchain by Omkar
• 67,620 points
246 views
0 votes
1 answer

Command "network" is not defined. in hyperledger composer

For composer network to work, you must ...READ MORE

Nov 21, 2018 in Blockchain by Omkar
• 67,620 points
241 views
+1 vote
5 answers

Where does the smart contracts stored and executed on blockchain?

Ethereum smart contracts are executed on EVM ...READ MORE

May 2, 2018 in Blockchain by Shashank
• 10,350 points
833 views
+3 votes
4 answers

How do I add a new node on a Hyperledger network?

You can do this by generating the crypto ...READ MORE

Apr 6, 2018 in Blockchain by Christine
• 15,790 points
1,596 views
0 votes
1 answer

Hyperledger — how to set up REST API for invoking Chaincode?

Hyperledger Fabric v1.0 and later does not ...READ MORE

Nov 16, 2018 in Blockchain by Christine
• 15,790 points
430 views
0 votes
1 answer

Hyperledger Composer: How to write complex queries in Composer?

You can do this using the query ...READ MORE

Nov 20, 2018 in Blockchain by Omkar
• 67,620 points
255 views
+1 vote
7 answers

What are the advantages and limitations of hyperledger composer over fabric?

While hyperledger composer is a set of ...READ MORE

Apr 7, 2018 in Blockchain by Perry
• 17,020 points
1,478 views
0 votes
1 answer

Hyperledger composer: How to include relationship in custom query?

You are trying to use filter={"include":"resolve"} in Composer Query. ...READ MORE

Nov 16, 2018 in Blockchain by Omkar
• 67,620 points
384 views
0 votes
1 answer

Hyperledger Fabric: Upgrading Chaincode after modification

You need to specify the channel name ...READ MORE

Nov 13, 2018 in Blockchain by Omkar
• 67,620 points
512 views
0 votes
2 answers
+1 vote
1 answer

invalid sender error when trying to send signed transaction

Hi, i had the same error and ...READ MORE

Nov 16, 2018 in Blockchain by bublig737
527 views
0 votes
1 answer

Hyperledger Composer: How to retrieve array of assets?

This is what worked for me: asset Ask ...READ MORE

Nov 14, 2018 in Blockchain by Omkar
• 67,620 points
437 views
0 votes
1 answer

Hyperledger Fabric: How to Enable Full Logging in Balance Transfer?

This is how you can do it. ...READ MORE

Nov 16, 2018 in Blockchain by Omkar
• 67,620 points
319 views
+1 vote
4 answers

How to estimate the cost for deploying smart contract on mainnet?

Since you have already deployed the contract ...READ MORE

Apr 9, 2018 in Blockchain by Shashank
• 10,350 points
1,466 views
+1 vote
3 answers

How efficient is Ethereum in regard to its TPS??

TPS means transactions processing at any given ...READ MORE

Apr 16, 2018 in Blockchain by Shashank
• 10,350 points
1,331 views
0 votes
1 answer

Can not make a peer in Hyperledger Fabric

You have not installed jdk on your system. ...READ MORE

Nov 22, 2018 in Blockchain by Omkar
• 67,620 points
40 views
0 votes
1 answer

Hyperledger Vagrant make peer failed

Maybe you forgot to install docker. Try ...READ MORE

Nov 22, 2018 in Blockchain by digger
• 26,550 points
31 views
0 votes
1 answer

Accessing External Api in HyperLedger Fabric

Generally you are not supposed to call ...READ MORE

Nov 16, 2018 in Blockchain by Christine
• 15,790 points
271 views
0 votes
1 answer

Hyperledger Fabric :failed to send proposal to peers: Unable to resolve host peer0.org1

This peer address does not exist on ...READ MORE

Nov 16, 2018 in Blockchain by Omkar
• 67,620 points
277 views
0 votes
1 answer

How to connect channels of different systems in Hyperledger Fabric?

When you create a channel, you will ...READ MORE

Nov 20, 2018 in Blockchain by Omkar
• 67,620 points
66 views
0 votes
1 answer

Hyperledger Fabric: can't load package: package github.com/hyperledger/fabric/core/chaincode/shim:

You can install various golang projects with ...READ MORE

Oct 30, 2018 in Blockchain by Omkar
• 67,620 points
964 views
0 votes
1 answer

TestRPC/Ganache: the transaction doesn't have the correct nonce

Using MetaMask v3.14.1 you can reset your account as ...READ MORE

Nov 14, 2018 in Blockchain by Perry
• 17,020 points
293 views
0 votes
1 answer

Hyperledger Composer: How to subscribe to and see events from transactions?

Here's the problem: this.businessNetworkConnection.on('events' //This should be changed ...READ MORE

Nov 14, 2018 in Blockchain by Omkar
• 67,620 points
297 views
0 votes
1 answer

What files are supported by BigchainDB?

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

Feb 26 in Blockchain by anonymous
37 views
0 votes
1 answer

Hyperledger Fabric:Promise is rejected:Error:Failed to deserialize creator identity,The supplied identity is not valid.

 This error happens because basic-network/docker-compose.yaml has CA ...READ MORE

Nov 14, 2018 in Blockchain by Omkar
• 67,620 points
265 views
0 votes
1 answer

Ethereum: Cloning cpp-ethereum from git.

Yes, you can only clone the additional ...READ MORE

Nov 19, 2018 in Blockchain by Omkar
• 67,620 points
35 views
0 votes
1 answer

Hyperledger: Explorer Shows Empty Data and Promise is rejected: Error: 12 UNIMPLEMENTED: unknown service protos.Endorser

This config worked for me: { "network-config": { ...READ MORE

Nov 13, 2018 in Blockchain by Omkar
• 67,620 points
295 views
0 votes
1 answer

Hyperldger: Hyperledger Explorer not starting. Throws error

in "network-config" you should use lowercase 'org1' { ...READ MORE

Nov 8, 2018 in Blockchain by Omkar
• 67,620 points
505 views
0 votes
1 answer

Hyperledger Composer: Error: Error trying to start business network. Error: No valid responses from any peers.

You have to configure TLS in peers ...READ MORE

Nov 5, 2018 in Blockchain by Omkar
• 67,620 points
593 views
0 votes
1 answer

Hyperledger Fabric: make peer make: *** No rule to make target `peer'. Stop

The makefile is in /opt/gopath/src/github.com/hyperledger/fabric , not ...READ MORE

Nov 15, 2018 in Blockchain by Omkar
• 67,620 points
163 views
0 votes
1 answer

Hyperledger Composer: How to specify server name in composer connection profile?

To solve this problem you can use ...READ MORE

Nov 14, 2018 in Blockchain by Omkar
• 67,620 points
204 views