Most viewed questions in Blockchain

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Stratum connection for bitcoin pool mining

After hours of tinkering around I have ...READ MORE

Apr 7, 2022 in Blockchain by Aditya
• 7,680 points
1,370 views
0 votes
1 answer

Hyperledger Fabric: Kafka can not establish a connection

Try this:  kafka1.hyperfabric.xyz: image: hyperledger/fabric-kafka restart: ...READ MORE

Nov 9, 2018 in Blockchain by Omkar
• 69,230 points
1,370 views
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1 answer

Where is the hyperlewdger fabric endorsement policy stored?

I don't know exactly where is the ...READ MORE

Jul 3, 2018 in Blockchain by charlie_brown
• 7,720 points
1,370 views
0 votes
1 answer

Hyperledger Composer: not able to install Hyperledger composer-cli

Try setting the PATH like this, export PATH="/usr/local/share/npm/bin:$PATH" Now run the ...READ MORE

Oct 31, 2018 in Blockchain by Omkar
• 69,230 points
1,367 views
0 votes
3 answers

python ethereum (pyethapp): Failed building wheel for scrypt.

First try installing sudo apt-get install openssl However, If ...READ MORE

Oct 12, 2018 in Blockchain by Girish
1,367 views
0 votes
1 answer

how to get the information of asset created in hyperledger composer in case of with out transaction?

First, get the list of all existing ...READ MORE

Mar 13, 2019 in Blockchain by Omkar
• 69,230 points
1,366 views
0 votes
1 answer

How do nodes communicate with each other in hyperledger?

First let me tell you that there ...READ MORE

Jul 17, 2018 in Blockchain by slayer
• 29,350 points
1,366 views
+1 vote
1 answer

How immutability is achieved in hyperledger fabric?

Since it is a private blockchain platform, ...READ MORE

Apr 21, 2018 in Blockchain by Perry
• 17,100 points
1,363 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
• 69,230 points
1,359 views
0 votes
1 answer

How to monitor Ethereum private network?

geth should be started with --metrics. try the ...READ MORE

Jul 11, 2018 in Blockchain by slayer
• 29,350 points
1,356 views
0 votes
1 answer

Not able send ether to my smart contract's address

It turns out that you need to create ...READ MORE

Sep 25, 2018 in Blockchain by slayer
• 29,350 points
1,350 views
0 votes
1 answer

Cannot read property 'getBlock' of undefined

getBlock is used by web3 and to use it, ...READ MORE

Jan 29, 2019 in Blockchain by Omkar
• 69,230 points
1,346 views
0 votes
1 answer

Hyperledger Fabric: Error: Error getting (myc) orderer endpoint: Error endorsing GetConfigBlock

First of all please note, that during ...READ MORE

Oct 31, 2018 in Blockchain by Omkar
• 69,230 points
1,344 views
0 votes
1 answer

Hyperledger Fabric: Could not resolve all dependencies for configuration

First, build the chaincode using gradle build. You should ...READ MORE

Nov 2, 2018 in Blockchain by Omkar
• 69,230 points
1,340 views
0 votes
1 answer

Hyperledger Fabric: error on outputChannelCreateTx: Cannot define a new channel with no Application section

Try defining or referencing the application in ...READ MORE

Nov 2, 2018 in Blockchain by Omkar
• 69,230 points
1,333 views
0 votes
1 answer

How to compute SHA256 hash for bitcoin header

header_hex = "02000000aaf8ab82362344f49083ee4edef795362cf135293564c4070000000000000000c009bb6222e9bc4cdb8f26b2e8a2f8d163509691a4038fa692abf9a474c9b21476800755c02e17181fe6c1c3" # Decode header hex into ...READ MORE

Aug 31, 2018 in Blockchain by digger
• 26,740 points
1,330 views
0 votes
0 answers

Cannot create crypto materiel with cryptogen command?

When I am creating crypto-materiel with cryptogen ...READ MORE

Feb 26, 2019 in Blockchain by Tharindu
• 170 points
1,329 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
• 69,230 points
1,327 views
0 votes
1 answer

Can one contract own tokens of another contract?

Yes, contracts can own tokens. The transaction you ...READ MORE

Oct 17, 2018 in Blockchain by Christine
• 15,790 points
1,327 views
0 votes
2 answers

is there any way of getting all data in hyperledger fabric before we start the ledger

Hey, @Harinishree, You can also do one thing, ...READ MORE

Jun 4, 2020 in Blockchain by Gitika
• 65,910 points
1,326 views
0 votes
1 answer

How to call external data using smart contracts?

Smart contracts can not directly call external ...READ MORE

Jul 16, 2018 in Blockchain by slayer
• 29,350 points
1,326 views
0 votes
1 answer

bitcoin to currency converter and it's reverse in php

Ok, you can get the value by ...READ MORE

Apr 7, 2022 in Blockchain by Aditya
• 7,680 points
1,325 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
1,324 views
–1 vote
1 answer

setEtherbase() not working in geth

setEtherbase() is not a method of the personal ...READ MORE

Jan 17, 2019 in Blockchain by Omkar
• 69,230 points
1,323 views
0 votes
1 answer

PHP Bitcoin validate from form

isValid($addr, $version) $addr: A bitcoin address $version: The ...READ MORE

Sep 3, 2018 in Blockchain by slayer
• 29,350 points
1,319 views
0 votes
1 answer

how to get modification history of asset?

You can use GetHistoryForKey() API as shown ...READ MORE

Jul 9, 2018 in Blockchain by digger
• 26,740 points
1,319 views
0 votes
1 answer

How do I develop a supply chain DApp on Blockchain?

Either of the ways is acceptable but ...READ MORE

May 30, 2018 in Blockchain by Perry
• 17,100 points
1,319 views
+1 vote
1 answer

What'd be the best database to store data on blockchain?

To read and add data you can ...READ MORE

Apr 25, 2018 in Blockchain by Christine
• 15,790 points
1,319 views
0 votes
0 answers

how to sign bitcoin psbt with ledger?

I'm trying to sign a PSBT transaction ...READ MORE

Mar 9, 2022 in Blockchain by Soham
• 9,700 points
1,318 views
+1 vote
1 answer

Car lease demo database location in IBM blockchain

Firstly, yes you can change the default DB ...READ MORE

Jun 7, 2018 in Blockchain by Christine
• 15,790 points
1,318 views
0 votes
1 answer

Required parameter missing: account error

You need to swap out the place ...READ MORE

Aug 30, 2018 in Blockchain by slayer
• 29,350 points
1,315 views
0 votes
2 answers

how save data from different account using web3.py to smart contract

Hey, @Amal, It will automatically take the address ...READ MORE

Jul 28, 2020 in Blockchain by Rajiv
• 8,910 points
1,314 views
0 votes
1 answer

How to input realtime data from google sheets into urlfetch google scripts?

Based on your title I hope to ...READ MORE

Oct 12, 2018 in Blockchain by Perry
• 17,100 points
1,314 views
0 votes
1 answer

How do I submit multiple transaction in a block?

There can only be one block at ...READ MORE

May 10, 2018 in Blockchain by Johnathon
• 9,090 points
1,303 views
0 votes
1 answer

Hyperledger Fabric v1.0 setup on multiple machines

You would be able to host hyperledger fabric ...READ MORE

Oct 23, 2018 in Blockchain by Perry
• 17,100 points
1,302 views
+1 vote
1 answer

how to creat a privaet blockchain network using ganache step by step process

This might help, check it out https://www.codementor.io/@swader/de ...READ MORE

Jan 13, 2020 in Blockchain by Rhea
1,297 views
0 votes
1 answer

Generating Bitcoin addresses from a xpubkey

Via https://bitcointalk.org/index.php?topic=1242247.0 var pubkey = ExtPubKey.Parse("xpub6CUGRUonZSQ4TWtTMmzXdrXDtypWKiKrhko4egpiMZbpiaQL2jkwSB1icqYh2cfDfVxdx4df189oLKnC5fSwqPfgyP3hooxujYzAu3fDVmz"); var newAddress = pubkey.Derive(0).Derive(0).PubKey.GetAddress(Network.Main); Console.WriteLine(newAddress); It ...READ MORE

Aug 21, 2018 in Blockchain by slayer
• 29,350 points
1,297 views
0 votes
1 answer

Can smart contract have token balance?

Smart contracts can receive and send tokens ...READ MORE

May 31, 2018 in Blockchain by Shashank
• 10,400 points
1,296 views
+1 vote
1 answer

how to create a voting Dapp ?!

If you want to create your own ...READ MORE

Aug 3, 2020 in Blockchain by moshbhavika
• 140 points
1,295 views
+1 vote
1 answer

Can I mine a specific transaction on ethereum?

On a public ethereum network it is ...READ MORE

Apr 24, 2018 in Blockchain by Shashank
• 10,400 points

edited Oct 6, 2021 by Sarfaraz 1,295 views
+4 votes
5 answers

How is Blockchain a distributed database?

Think of blockchain as a relatively slow, ...READ MORE

Mar 26, 2018 in Blockchain by Christine
• 15,790 points
1,294 views
0 votes
1 answer

How to use local binance smart chain lightclient to access the blockchain with web3.js?

So the answer is that I was ...READ MORE

Apr 12, 2022 in Blockchain by Rahul
• 9,670 points
1,289 views
0 votes
1 answer

How can i integrate Omnet++ with ethereum ?? or is there any other simulator which can do this??

You can use Hive Validator. Using this, you ...READ MORE

Apr 9, 2019 in Blockchain by Omkar
• 69,230 points
1,287 views
–1 vote
1 answer

How to list ethereum accounts in RPC?

You can use the following command to ...READ MORE

Jan 10, 2019 in Blockchain by Omkar
• 69,230 points
1,287 views
0 votes
1 answer

Hyperledger on Kubernetes - How can Kubernetes be aware of Chaincode container

I have been investigating the same issue ...READ MORE

Oct 22, 2018 in Blockchain by Christine
• 15,790 points
1,286 views
0 votes
1 answer

How to fix browser/IERC20.sol:4:53: Warning: This declaration shadows an existing declaration

I believe the issue is the reuse ...READ MORE

Oct 1, 2018 in Blockchain by slayer
• 29,350 points
1,285 views
0 votes
1 answer

"Blocking waiting for file lock on the registry index"

Use the following command: rm -rf ~/.cargo/registry/index/* Or you ...READ MORE

Jun 18, 2018 in Blockchain by Christine
• 15,790 points
1,281 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
• 69,230 points
1,279 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
• 17,100 points
1,279 views
+1 vote
1 answer

Is there a way to send funds from a specific bitcoin address in a wallet?

I'll answer my own question, It was unbelievably ...READ MORE

Sep 3, 2018 in Blockchain by Perry
• 17,100 points
1,277 views