Latest questions in Blockchain

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1 answer

Truffle compile shows DeclarationError: Undeclared identifier.

Hey. You might have missed declaring the "myaddress"  ...READ MORE

Dec 4, 2018 in Blockchain by Omkar
 • 69,210 points • 2,179 views
0 votes
1 answer

Should I encrypt my address before sending bitcoin?

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

Dec 4, 2018 in Blockchain by Omkar
 • 69,210 points • 463 views
0 votes
1 answer

What is the difference between hashing and encryption process?

Hashing and encryption are same but not ...READ MORE

Dec 4, 2018 in Blockchain by Omkar
 • 69,210 points • 1,591 views
0 votes
1 answer

Can we find out the bitcoin sender by their address?

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

Dec 4, 2018 in Blockchain by Omkar
 • 69,210 points • 1,776 views
0 votes
1 answer

What is the mean Hash Encryption?

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

Dec 4, 2018 in Blockchain by Omkar
 • 69,210 points • 441 views
+1 vote
1 answer

Why is Blockchain called a Disruptive Technology?

Blockchain Technology showed the world a new ...READ MORE

Dec 4, 2018 in Blockchain by Omkar
 • 69,210 points • 763 views
0 votes
1 answer

Truffle npm run dev throws Error: npm ERR! Linux 4.15.0-39-generic

The json file required to run dev is ...READ MORE

Dec 1, 2018 in Blockchain by Omkar
 • 69,210 points • 1,870 views
0 votes
1 answer

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

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

Dec 1, 2018 in Blockchain by Omkar
 • 69,210 points • 908 views
0 votes
2 answers

Truffle compile: Cant find module error

You can install babel-register and try again. ...READ MORE

Feb 19, 2019 in Blockchain by Loki
 • 2,751 views
0 votes
1 answer

truffle npm run dev not working

Are you running this command from the ...READ MORE

Dec 1, 2018 in Blockchain by Omkar
 • 69,210 points • 1,392 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
 • 69,210 points • 751 views
0 votes
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 30, 2018 in Blockchain by Omkar
 • 69,210 points • 927 views
0 votes
1 answer

Cant initialization project in truffle

Try this: truffle unbox webpack READ MORE

Nov 30, 2018 in Blockchain by Omkar
 • 69,210 points • 539 views
0 votes
1 answer

Ethereum truffle server command not working

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

Nov 30, 2018 in Blockchain by Omkar
 • 69,210 points • 997 views
0 votes
3 answers

Truffle migrate Could not connect to your Ethereum client.

As mentioned in the previous answer, you ...READ MORE

Feb 19, 2019 in Blockchain by Dinesh
 • 11,392 views
0 votes
1 answer

Not able to install truffle using npm install -g truffle

You need root access to install truffle, ...READ MORE

Nov 29, 2018 in Blockchain by Omkar
 • 69,210 points • 4,161 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
 • 69,210 points • 676 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
 • 69,210 points • 1,214 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
 • 26,740 points • 671 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
 • 69,210 points • 418 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
 • 69,210 points • 1,595 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
 • 69,210 points • 1,209 views
+2 votes
4 answers

"failed to create new connection context deadline exceeded." error in Hyperledger Fabric

Try remove previous docker containers(have mentioned the ...READ MORE

Apr 24, 2019 in Blockchain by Kiran
 • 12,117 views
0 votes
4 answers

Hyperledger fabric: enrollAdmin.js Error: Cannot find module 'fabric-client'

Change your directory to fabric-samples/fabrcar. And run: npm ...READ MORE

Nov 21, 2018 in Blockchain by Omkar
 • 69,210 points • 4,616 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
 • 69,210 points • 1,306 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
 • 69,210 points • 490 views
0 votes
1 answer

Hyperledger Fabric: How to get transaction history using key?

history, err := stub.GetHistoryForKey(key_value) for history.HasNext() { ...READ MORE

Nov 20, 2018 in Blockchain by Omkar
 • 69,210 points • 3,315 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
 • 69,210 points • 1,032 views
0 votes
2 answers

Hyperledger Fabric: Channel creation failed! FAILED to execute End-2-End Scenario

This error usually occurs if some old ...READ MORE

May 8, 2019 in Blockchain by John
 • 2,990 views
0 votes
2 answers

Hyperledger byfn: could not assemble transaction: ProposalResponsePayloads do not match

This is because you have not installed ...READ MORE

Nov 20, 2018 in Blockchain by Omkar
 • 69,210 points • 3,036 views
0 votes
1 answer

Hyperledger Fabric: “Local Fabric binary version does not match this newer version of BYFN and is unsupported”.

You need to first delete the existing ...READ MORE

Nov 19, 2018 in Blockchain by Omkar
 • 69,210 points • 6,564 views
+1 vote
3 answers

Hyperledger Fabric: How to delete installed chaincode ?

One way to do it, that I ...READ MORE

Nov 19, 2018 in Blockchain by Omkar
 • 69,210 points • 5,002 views
0 votes
2 answers

Hyperledger Fabric: Error: could not assemble transaction, err proposal response was not successful.

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

Nov 19, 2018 in Blockchain by Omkar
 • 69,210 points • 7,882 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
 • 69,210 points • 3,453 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
 • 69,210 points • 673 views
0 votes
1 answer

Accessing External Api in HyperLedger Fabric

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

Nov 17, 2018 in Blockchain by Christine
 • 15,790 points • 1,564 views
+1 vote
1 answer

Hyperledger fabric java sdk setup

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

Nov 17, 2018 in Blockchain by Christine
 • 15,790 points • 2,493 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 17, 2018 in Blockchain by Christine
 • 15,790 points • 2,415 views
0 votes
1 answer

How can I send data to docker?

Whenever i invoke chaincode from the cli ...READ MORE

Nov 17, 2018 in Blockchain by Christine
 • 15,790 points • 381 views
0 votes
1 answer

Hyperledger Fabric: How to Parse arrays in req.body in node js express?

You can get the value from the ...READ MORE

Nov 16, 2018 in Blockchain by Kavya
 • 6,170 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
 • 69,210 points • 1,255 views
0 votes
1 answer

Hyperledger Fabric: Changing component item owner automatically with its parent

You can try something like this: /** * ...READ MORE

Nov 16, 2018 in Blockchain by Omkar
 • 69,210 points • 828 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
 • 69,210 points • 940 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
 • 69,210 points • 2,035 views
0 votes
1 answer

Hyperledger Fabric: How to start/stop the fabric nodes?

This is another way to do it: docker ...READ MORE

Nov 15, 2018 in Blockchain by Omkar
 • 69,210 points • 1,010 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
 • 69,210 points • 1,013 views
0 votes
1 answer

Hyperledger Docker: Error building images: cannot connect to Docker endpoint.

Check your container environment variable: CORE_VM_ENDPOINT=unix:///var/run/docker.sock Then if you ...READ MORE

Nov 15, 2018 in Blockchain by Omkar
 • 69,210 points • 1,526 views
0 votes
1 answer

Hyperledger Fabric: unable to check out source code from gerrit.hyperledger.org

There's something wrong with your SSH key. ...READ MORE

Nov 15, 2018 in Blockchain by Omkar
 • 69,210 points • 482 views
0 votes
1 answer

Hyperledger Fabric: peer creation no ordering service endpoint created error

You have to pass an orderer in ...READ MORE

Nov 15, 2018 in Blockchain by Omkar
 • 69,210 points • 553 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 15, 2018 in Blockchain by Perry
 • 17,100 points • 2,661 views
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