Trending questions in Blockchain

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2 answers

Where can i find Hyperledger Fabric Node SDK sample application?

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

Apr 25 in Blockchain by Firoz
1,380 views
0 votes
1 answer

Not able to pull any events in ethereum

You need to catch the even emitted ...READ MORE

Dec 31, 2018 in Blockchain by Omkar
• 67,620 points
30 views
–1 vote
1 answer

User Identity Management in Ethereum using ERC725

The identity consists of two main parts: Keys ...READ MORE

Dec 28, 2018 in Blockchain by Omkar
• 67,620 points
192 views
0 votes
1 answer

Ethereum contract hangs on AWS

Please check the memory consumption for docker ...READ MORE

Dec 31, 2018 in Blockchain by Omkar
• 67,620 points
30 views
0 votes
1 answer

When I create public getters (committed code), my contract exceeds code size limit

Are you pushing info one by one ...READ MORE

Dec 31, 2018 in Blockchain by Omkar
• 67,620 points
18 views
0 votes
3 answers

Hyperledger fabcar sample fabric error: sendPeersProposal - Promise is rejected: Error: Connect Failed

Open the datasources.json file and replace the grpcs:// with grpc://. This solution worked ...READ MORE

Apr 30 in Blockchain by Reshma
884 views
+1 vote
2 answers

How to solve Hyperledger Fabric "error endorsing chaincode" error?

Try to install chaincode with a name ...READ MORE

Jul 13, 2018 in Blockchain by digger
• 26,550 points
894 views
0 votes
2 answers

Hyperledger Fabric: invokeChaincode returns [Object object]

Replace  return shim.success(valString); with: return shim. ...READ MORE

Nov 9, 2018 in Blockchain by Omkar
• 67,620 points
194 views
0 votes
1 answer

Not able to install Multichain

Hi. It seems you have changed some ...READ MORE

Dec 28, 2018 in Blockchain by Omkar
• 67,620 points
23 views
–1 vote
1 answer

Unable to create account in geth

Well, that's not how you create a ...READ MORE

Dec 28, 2018 in Blockchain by Omkar
• 67,620 points
58 views
+1 vote
2 answers

Where is custom chaincode path Hyperledger Fabric 1.0?

You have to have your chaincode at ...READ MORE

Jul 10, 2018 in Blockchain by slayer
• 29,170 points
967 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 in Blockchain by Tina
989 views
+2 votes
2 answers

Can two chaincode interact with each other?

Yes, it is possible for two chaincodes ...READ MORE

Jul 12, 2018 in Blockchain by slayer
• 29,170 points
729 views
0 votes
2 answers

How to use multiple anchor peers in an organization?

To use multiple anchor peers, you need ...READ MORE

Jul 10, 2018 in Blockchain by digger
• 26,550 points
734 views
+1 vote
4 answers

What is hf.Registrar.Roles in fabric-ca-client command?

The "hf.Registrar.Roles" attribute is used to control ...READ MORE

Jul 11, 2018 in Blockchain by slayer
• 29,170 points
573 views
0 votes
2 answers

What is the difference between full node and partial node?

We need different types of nodes to ...READ MORE

May 30 in Blockchain by Sourav kumar
177 views
0 votes
1 answer

Solidity error: SyntaxError: No visibility specified.

As mentioned in the error, you have ...READ MORE

Dec 12, 2018 in Blockchain by Omkar
• 67,620 points
493 views
+1 vote
5 answers

Does Hyperledger remove asset actually remove anything?

Hyperledger remove asset doesn't actually "remove" the ...READ MORE

Jun 19, 2018 in Blockchain by charlie_brown
• 7,720 points
911 views
0 votes
2 answers

Not able to POST chaincode to hyperledger-fabric using API

TypeError: Cannot read property 'curve' of undefined     at ...READ MORE

Jan 30 in Blockchain by SHRADDHA
87 views
0 votes
1 answer

Not able to install Solidity in Ubuntu

Use this instead: sudo snap install solc​ READ MORE

Dec 12, 2018 in Blockchain by slayer
• 29,170 points
245 views
0 votes
1 answer

geth: Fatal: invalid genesis file: invalid character 'â' looking for beginning of object key string

Looks like your editor is adding characters ...READ MORE

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

How to reintialize genesis block in geth ethereum?

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

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

Not able to attach geth.ipc: Fatal: Unable to attach to remote geth: connect: connection refused

You should not mention double quotes for ...READ MORE

Dec 6, 2018 in Blockchain by Omkar
• 67,620 points
409 views
0 votes
1 answer

geth: Fatal: Error starting protocol stack: datadir already used by another process

It seems like geth is already running. ...READ MORE

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

Can not open geth console: Fatal: Error starting protocol stack: listen tcp :30303: bind: address already in use

The default port for geth is 30303. ...READ MORE

Dec 6, 2018 in Blockchain by Omkar
• 67,620 points
367 views
0 votes
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
• 17,020 points
376 views
+1 vote
2 answers

How can I traverse the blocks of transactions in hyperledger fabric?

For hyperledger fabric you can use query ...READ MORE

May 8, 2018 in Blockchain by Rachel
1,889 views
0 votes
1 answer

truffle create contract shows no network available error

In your truffle project directory, you have ...READ MORE

Dec 11, 2018 in Blockchain by Omkar
• 67,620 points
82 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
1,172 views
0 votes
1 answer

Not able to migrate truffle project even after running testrpc

Maybe you forgot to compile the project ...READ MORE

Dec 11, 2018 in Blockchain by Omkar
• 67,620 points
71 views
0 votes
1 answer

geth: Fatal: Failed to read genesis file: open “/home/edureka/privatechain/”: no such file or directory

Use this: geth --datadir ./data init ./custom_genesis.json READ MORE

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

Cant set Remix IDE to work on testrpc

As I can see that you are ...READ MORE

Dec 11, 2018 in Blockchain by Omkar
• 67,620 points
48 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
• 67,620 points
549 views
0 votes
1 answer

Not able to create contracts in truffle

It seems like you have files missing that ...READ MORE

Dec 11, 2018 in Blockchain by Omkar
• 67,620 points
29 views
+1 vote
2 answers

How to return value from a chaincode in Hyperledger Fabric?

Hyperledger Fabric supports only 2 types of ...READ MORE

Jun 13, 2018 in Blockchain by Perry
• 17,020 points
858 views
0 votes
1 answer

How to create a contract in truffle?

The command you are using to create ...READ MORE

Dec 11, 2018 in Blockchain by Omkar
• 67,620 points
26 views
0 votes
1 answer

Why do I require fabric-kafka and fabric-order containers in same network?

There are three ordering services, as you ...READ MORE

Dec 5, 2018 in Blockchain by Perry
• 17,020 points
258 views
+1 vote
8 answers

How is Blockchain a linked list?

Blockchain is similar to Single Linked List ...READ MORE

Aug 3, 2018 in Blockchain by Omkar
• 67,620 points
2,142 views
0 votes
1 answer

Private ethereum network can not find geth.ipc

If you have initialized the genesis block ...READ MORE

Dec 6, 2018 in Blockchain by Omkar
• 67,620 points
190 views
+1 vote
1 answer

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

Looks like the account you are trying ...READ MORE

Dec 6, 2018 in Blockchain by Omkar
• 67,620 points
145 views
+15 votes
5 answers

How to add Org or peer in Org dynamically in Hyperledger fabric?

I know it is a bit late ...READ MORE

Jul 27, 2018 in Blockchain by Omkar
• 67,620 points

edited Jul 22 by Omkar 1,837 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
• 67,620 points
320 views
0 votes
1 answer

truffle npm run dev not working

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

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

truffle compile shows error: TypeError: Invalid type for argument in function call.

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

Dec 4, 2018 in Blockchain by Omkar
• 67,620 points
122 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
• 67,620 points
716 views
0 votes
1 answer

What is the difference between hashing and encryption process?

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

Dec 3, 2018 in Blockchain by Omkar
• 67,620 points
134 views
+1 vote
1 answer

Why is Blockchain called a Disruptive Technology?

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

Dec 3, 2018 in Blockchain by Omkar
• 67,620 points
85 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
• 67,620 points
729 views
0 votes
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
• 67,620 points
73 views