Most viewed questions in Blockchain

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truffle migrate Error

testrpc Check your truffle.js config port and ip ...READ MORE

Oct 8, 2018 in Blockchain by Omkar
 • 69,190 points • 954 views
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1 answer

Nethereum C# Unit Test GetTransactionCount

You have already made the test async ...READ MORE

Sep 26, 2018 in Blockchain by slayer
 • 29,350 points • 952 views
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0 answers

How I can connect multiple physical machine with hyperledger fabric??

I want to connect my 3 computers ...READ MORE

Mar 12, 2020 in Blockchain by Md
 • 120 points • 951 views
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1 answer

How to create an asset on Bigchaindb server using http call

You could start like this: method = POST URL ...READ MORE

Sep 19, 2018 in Blockchain by Christine
 • 15,790 points • 949 views
+1 vote
0 answers

Hyperledger fabric : unable to create channel on raspberry pi 4 with Raft ordering service

Hello, I am trying to setup an hyperledger ...READ MORE

May 13, 2020 in Blockchain by Manon
 • 130 points • 948 views
+1 vote
1 answer

Protocols used in a distributed/dlt system for the nodes to establish communication

yes all are over TCP/IP connections secured by TLS encryption in hashgraph architecture-hashgraph, ...READ MORE

Aug 6, 2018 in Blockchain by aryya
 • 7,450 points • 946 views
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1 answer

Hyperledger fabcar: node enrollAdmin.js error

Update the node: npm rebuild and then run ...READ MORE

Oct 26, 2018 in Blockchain by anonymous
 • 943 views
+1 vote
1 answer

Do we need metamask extension to make transactions on ether?

Actually, we don't need Metamask. To make ...READ MORE

Apr 8, 2018 in Blockchain by Perry
 • 17,100 points • 943 views
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1 answer

how can i convert stub.GetTxTimestamp() to type string?

You can not directly convert the timestamp ...READ MORE

Jul 5, 2018 in Blockchain by digger
 • 26,740 points • 942 views
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1 answer

How is storage space handled in hyperledger peer?

Every transaction is not stored by every ...READ MORE

May 11, 2018 in Blockchain by anonymous
 • 941 views
+1 vote
1 answer

How does the geth ethereum platform automatically connect to the nodes that are in the main network of Ethereum?

When you start with Geth you need ...READ MORE

Mar 28, 2018 in Blockchain by Perry
 • 17,100 points • 939 views
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0 answers

how to add path of chain code in hyperledger fabric in startfabric.sh

#!/bin/bash # # Copyright IBM Corp All Rights Reserved # # ...READ MORE

Mar 17, 2019 in Blockchain by anonymous
 • 938 views
0 votes
1 answer

AWS multichain network, "Couldn't connect to the seed node" error

The error says "please check multichaind is ...READ MORE

Jul 9, 2018 in Blockchain by slayer
 • 29,350 points • 938 views
0 votes
1 answer

Variable declaration problem in truffle console.

The reason it says “undefined” is because ...READ MORE

Jan 27, 2019 in Blockchain by Omkar
 • 69,190 points • 935 views
0 votes
1 answer

Solidity: How can I return a list of user-defined function?

You can do it with something like ...READ MORE

Sep 26, 2018 in Blockchain by digger
 • 26,740 points • 935 views
0 votes
1 answer

Getting the length of public array variable (getter)

The calling contract will need the ABI ...READ MORE

Sep 24, 2018 in Blockchain by digger
 • 26,740 points • 933 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
 • 69,190 points • 932 views
0 votes
1 answer

In Hyperledger fabric, how does committer validate the transaction?

Endorsing and committing are just two functions ...READ MORE

Jul 3, 2018 in Blockchain by Omkar
 • 69,190 points • 931 views
0 votes
0 answers

Is there any API for ether sent transaction in ethereum without using web3.js

I want to do a transaction (sent ...READ MORE

Jun 17, 2019 in Blockchain by vishal tyagi
 • 929 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
 • 17,100 points • 926 views
+1 vote
1 answer

How do I create a relationship between list of suppliers and a single order in Hyperledger Composer

Is your transaction actually called 'OrderPlaced' (in ...READ MORE

Mar 28, 2018 in Blockchain by Johnathon
 • 9,090 points • 923 views
0 votes
1 answer

Error in Chaincodes not getting picked up by ./startFabric.sh

After changing chaincode in fabric-samples/chaincode/fabcar/go/fabcar.go (this is ...READ MORE

Jul 31, 2018 in Blockchain by Shashank
 • 10,400 points • 922 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 • 920 views
0 votes
1 answer

pubToAddress method from ethereumjs-util throws AssertionError: false == true

This code works fine: var keythereum = require('keythereum'); var ...READ MORE

Oct 8, 2018 in Blockchain by Omkar
 • 69,190 points • 918 views
0 votes
1 answer

How read-write sets is used in hyperledger?

You can find the explaination about it ...READ MORE

Jul 3, 2018 in Blockchain by digger
 • 26,740 points • 915 views
0 votes
1 answer

truffle migrate Error: “Cannot find module 'truffle-expect'”

Seems like you are missing some modules ...READ MORE

Jan 24, 2019 in Blockchain by Omkar
 • 69,190 points • 913 views
0 votes
1 answer

How to use std::iterator with basic type uint8_t*?

std::reverse_iterator takes the original iterator type as ...READ MORE

Aug 24, 2018 in Blockchain by slayer
 • 29,350 points • 913 views
0 votes
2 answers

Coinbase button creation and callback

You can use the following code for generating ...READ MORE

Sep 3, 2018 in Blockchain by Nitika
 • 912 views
0 votes
1 answer

Passing hash string with smart contracts

eth.sendTransaction is a go etherum function. There more ...READ MORE

Jul 5, 2018 in Blockchain by slayer
 • 29,350 points • 909 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
 • 69,190 points • 907 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 • 901 views
0 votes
1 answer

Poloniex C# API - get trades

Outputting the Trade will just show you ...READ MORE

Sep 25, 2018 in Blockchain by digger
 • 26,740 points • 901 views
0 votes
1 answer

Updating data of struct to save in chaincode.

You can use a code similar to ...READ MORE

Jul 5, 2018 in Blockchain by slayer
 • 29,350 points • 901 views
0 votes
1 answer

How to debug chaincode? LedgerError - ResourceNotFound

The following command, CORE_CHAINCODE_ID_NAME=mycc CORE_PEER_ADDRESS=0.0.0.0:30303 ./chaincode_example02 doesn't deploy the chaincode, ...READ MORE

Aug 3, 2018 in Blockchain by charlie_brown
 • 7,720 points • 899 views
0 votes
1 answer

How to create a private bitcoin network using bitcore?

I think you need to add your ...READ MORE

Sep 6, 2018 in Blockchain by slayer
 • 29,350 points • 898 views
0 votes
1 answer

Hyperledger Fabric query system chaincode using node SDK

The Fabric Node SDK actually provides a ...READ MORE

Nov 9, 2018 in Blockchain by Christine
 • 15,790 points • 897 views
0 votes
1 answer

Not receiving any data from the BitStamp API.

I saw a code online that was ...READ MORE

Aug 21, 2018 in Blockchain by digger
 • 26,740 points • 896 views
0 votes
1 answer

What is transientMap in node.js and getTransient in chaincode?

TransientMap: TransientMap  contains data that might be used to ...READ MORE

Jul 13, 2018 in Blockchain by digger
 • 26,740 points • 896 views
0 votes
1 answer

Security threat principles for Blockchain

These are some steps to prevent/eliminate security threats ...READ MORE

Feb 13, 2019 in Blockchain by Omkar
 • 69,190 points • 895 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 • 894 views
0 votes
1 answer

Hyperledger Fabric: How to give full read access to all participants?

To do this, you must first provide ...READ MORE

Nov 9, 2018 in Blockchain by Omkar
 • 69,190 points • 891 views
0 votes
0 answers

Solidity: How i can return data from hash value ?

I have a solidity contract with two ...READ MORE

Feb 14, 2020 in Blockchain by simone
 • 120 points • 890 views
0 votes
1 answer

Calling Truffle Commands through a script

Seems like its due to async behavior ...READ MORE

Jan 25, 2019 in Blockchain by Omkar
 • 69,190 points • 890 views
0 votes
1 answer

How can Blockchain be implemented for android development?

Essentially you need to understand what is ...READ MORE

Aug 10, 2018 in Blockchain by Johnathon
 • 9,090 points • 884 views
0 votes
1 answer

Curl Script Usage in Ethereum Blockcypher's API

You should store and keep the private ...READ MORE

May 28, 2018 in Blockchain by Christine
 • 15,790 points • 884 views
0 votes
1 answer

yfinance Crypto symbol list

After what I know about, YahooFinance uses ...READ MORE

Mar 24, 2022 in Blockchain by Rahul
 • 9,670 points • 882 views
0 votes
1 answer

How to send chaincode error to the calling application?

To pass message all the way to ...READ MORE

Jul 6, 2018 in Blockchain by digger
 • 26,740 points • 881 views
0 votes
1 answer

How to plug MSP,Consensus, Ordering service in Hyperledger Fabric?

To plug in MSP: Implement your own MSP ...READ MORE

Jun 27, 2018 in Blockchain by Omkar
 • 69,190 points • 878 views
0 votes
1 answer

XMLHttpRequest is not defined while sending request to blockchain service via C#

use post data in url link and ...READ MORE

Sep 20, 2018 in Blockchain by slayer
 • 29,350 points • 877 views
–1 vote
2 answers

Can I add extra miners to an Ethereum Private Network?

To add miners, add peers. Then with ...READ MORE

Feb 19, 2019 in Blockchain by Rahul
 • 876 views
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