Most viewed questions in Blockchain

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Hyperledger Fabric: Errors in Deliver and Broadcast services

Hello, I have create successfully a multi-org, ...READ MORE

Feb 22, 2019 in Blockchain by Cha
 • 441 views
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1 answer

How to use different network cards for multiple composer rest server users?

You are getting the same network card in ...READ MORE

Dec 5, 2018 in Blockchain by Perry
 • 17,090 points • 440 views
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1 answer

Add Peers does not add a peer in Geth console

Setup actual boot node, don't treat base ...READ MORE

Sep 28, 2018 in Blockchain by slayer
 • 29,260 points • 439 views
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1 answer

How to retrieve data from a block to a blockchain?

web3.eth.getTransaction(txHash) will returns transaction details like blockHash, transactionIndex, ...READ MORE

Jun 26, 2018 in Blockchain by Perry
 • 17,090 points • 439 views
–1 vote
1 answer

How to get pending transaction in geth?

You can check the pending transactions using ...READ MORE

Jan 16, 2019 in Blockchain by Omkar
 • 68,840 points • 437 views
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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
 • 68,840 points • 437 views
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1 answer

Fatal error while installing web3 node.

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

Aug 10, 2018 in Blockchain by digger
 • 26,660 points • 435 views
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1 answer

What happened on deploy, invoke and query in Hyperledger chaincode?

1. Deploy: During Deploy the chaincode is written onto ...READ MORE

Apr 26, 2018 in Blockchain by Christine
 • 15,810 points • 435 views
–1 vote
1 answer

User Identity management on Ethereum Blockchain

User Identity management can be done via ERC725 ...READ MORE

Dec 28, 2018 in Blockchain by Omkar
 • 68,840 points • 434 views
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1 answer

ethereum eth_sendTransaction via PHP curl

Your params field is missing a wrapping array. Try ...READ MORE

Sep 27, 2018 in Blockchain by slayer
 • 29,260 points • 433 views
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1 answer

javascript bytes32 to string

Assuming you're using web3 on the JS side, it's web3.toAscii. Example ...READ MORE

Oct 8, 2018 in Blockchain by Omkar
 • 68,840 points • 430 views
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1 answer

Access multiple return values (a, b, c) from solidity function in web3js

You'll get an array of return values ...READ MORE

Sep 14, 2018 in Blockchain by slayer
 • 29,260 points • 430 views
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1 answer

sendProposal - timed out after:45000, sendPeersProposal - Promise is rejected: Error: REQUEST_TIMEOUT

You could simply replace --net=bridge with --net=artifacts_default in your DockerFile.  I used ...READ MORE

Jul 26, 2018 in Blockchain by Perry
 • 17,090 points • 430 views
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How to solve “The method personal_newAccount does not exist/is not available” Error?

You are connecting using WS but have ...READ MORE

Jul 27, 2018 in Blockchain by slayer
 • 29,260 points • 429 views
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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
 • 68,840 points • 428 views
0 votes
1 answer

How to install Magento Bitcoin Currency extension on linux box?

Follow these steps to install it: Copy files ...READ MORE

Aug 17, 2018 in Blockchain by slayer
 • 29,260 points • 426 views
–1 vote
1 answer

Not able to create new account in geth for private ethereum blockchain

personal.newAccount() is not a default geth method. This ...READ MORE

Jan 17, 2019 in Blockchain by Omkar
 • 68,840 points • 417 views
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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
 • 68,840 points • 416 views
0 votes
1 answer

PHP IPC with geth Ethereum: How to communicate with client?

You have to use PHP Sockets $sock = socket_create(AF_UNIX, ...READ MORE

Oct 22, 2018 in Blockchain by Omkar
 • 68,840 points • 416 views
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1 answer

How to solve "Failed to deserialize creator identity error"?

It seems like the problem is caused ...READ MORE

Jul 13, 2018 in Blockchain by slayer
 • 29,260 points • 415 views
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1 answer

Hyperledger: How to update values from an asset?

This should work: return getAssetRegistry('org.rytle.Route').then(function(ar) { ...READ MORE

Nov 6, 2018 in Blockchain by Omkar
 • 68,840 points • 414 views
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1 answer

Hyperledger Composer: How to Update Existing Assets?

get on an asset registry returns a ...READ MORE

Nov 5, 2018 in Blockchain by Omkar
 • 68,840 points • 414 views
0 votes
1 answer

Hyperledger Fabric: cp: cannot stat ‘build/docker/gotools/bin/protoc-gen-go’: No such file or directory

Do this: $go get -u github.com/golang/protobuf/protoc-gen-go $ cp $GOPATH/bin/protoc-gen-go build/docker/gotools/bin/ Now ...READ MORE

Oct 29, 2018 in Blockchain by Omkar
 • 68,840 points • 413 views
0 votes
1 answer

How to set up Hyperledger Fabric v0.6 network without docker?

Hyperledger Fabric v0.6 does not provide any ...READ MORE

Jul 9, 2018 in Blockchain by slayer
 • 29,260 points • 407 views
+4 votes
2 answers

I am unable to connect Ganache with Truffle/Npm Dev server. Pls help.

The issue is at CurrentProvider. Give the url ...READ MORE

Mar 26, 2018 in Blockchain by Perry
 • 17,090 points
edited Oct 11, 2018 by Omkar • 407 views
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1 answer

How to generate events in Hyperledger Fabric?

You can generate events using a method ...READ MORE

Jul 26, 2018 in Blockchain by digger
 • 26,660 points • 404 views
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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
 • 15,810 points • 404 views
–1 vote
1 answer

Not able to use geth attach

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

Jan 17, 2019 in Blockchain by Omkar
 • 68,840 points • 403 views
0 votes
1 answer

How to create users on hyperledger and how to assign policies to the created users?

First the users need to establish identity ...READ MORE

Jul 10, 2018 in Blockchain by slayer
 • 29,260 points • 403 views
0 votes
1 answer

Hyperledger Fabric V1.0 Application using Java SDK Client for is waiting indefinitely when invoking chaincode

I ran into a similar issue to ...READ MORE

Jul 16, 2018 in Blockchain by Perry
 • 17,090 points • 402 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
 • 17,090 points • 401 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
 • 68,840 points • 400 views
0 votes
1 answer

Test ethereum Event Logs with truffle

You are passing tx hash into done() ...READ MORE

Sep 21, 2018 in Blockchain by slayer
 • 29,260 points • 398 views
0 votes
1 answer

Can I make my smart contract private in Quorum?

Yes, it is possible. You can look ...READ MORE

Jul 23, 2018 in Blockchain by slayer
 • 29,260 points • 398 views
+1 vote
1 answer

Security Properties of Hash Functions

The difference is indeed subtle. I understood ...READ MORE

Mar 26, 2018 in Blockchain by Johnathon
 • 9,090 points • 398 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

Nov 30, 2018 in Blockchain by Omkar
 • 68,840 points • 397 views
0 votes
1 answer

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

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

Jul 13, 2018 in Blockchain by Perry
 • 17,090 points • 397 views
0 votes
1 answer

BitcoinJ generate address from private key

Convert string private key into bytes[]: ECKey key = ...READ MORE

Sep 4, 2018 in Blockchain by slayer
 • 29,260 points • 396 views
0 votes
1 answer

Truffle init: throw er; // Unhandled 'error' event

Modified the cli.bundled.js: replaced https.request with request Diff: ...READ MORE

Sep 27, 2018 in Blockchain by digger
 • 26,660 points • 395 views
0 votes
1 answer

Hyperledger Fabric: How to retrieve result from Fabric Transaction?

invokeChainCode(securityContext, functionName, args, options) { ...READ MORE

Nov 8, 2018 in Blockchain by Omkar
 • 68,840 points • 394 views
0 votes
1 answer

Hyper Fabric: Error: CONNECTION_FAILED. Description: dialing connection timed out

The mapping is not set up right. ...READ MORE

Nov 9, 2018 in Blockchain by Omkar
 • 68,840 points • 392 views
0 votes
1 answer

How to connect a NS3 node to my local blockchain?

To connect all your nodes with all ...READ MORE

Jul 25, 2018 in Blockchain by digger
 • 26,660 points • 392 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
 • 68,840 points • 391 views
0 votes
2 answers

how to integrate coinbase api in php for transfer bitcoine

Here the code for php please have ...READ MORE

Sep 17, 2018 in Blockchain by Suresh
 • 391 views
+2 votes
1 answer

What are the difference between various Hyperledger Projects?

Hyperledger incubates a plethora of business blockchain ...READ MORE

Mar 26, 2018 in Blockchain by Perry
 • 17,090 points • 389 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
 • 17,090 points • 388 views
0 votes
1 answer

Hyperledger Fabric: "No go in PATH" error.

The error is because the go path ...READ MORE

Jun 27, 2018 in Blockchain by Omkar
 • 68,840 points • 388 views
0 votes
2 answers

Why is network already up to date while trying to deploy a contract on truffle?

I guess you have ganache running already ...READ MORE

Apr 23, 2018 in Blockchain by Shashank
 • 10,360 points • 388 views
0 votes
0 answers

Cannot read property 'curve' of undefined, while running hyperledger fabric project.

Cannot read property 'curve' of undefined ...READ MORE

Jan 30, 2019 in Blockchain by shraddha
 • 387 views
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