Trending questions in Blockchain

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How to solve rpc error: code = Unknown desc = timeout expired while starting chaincode error?

In the peer configuration, the port you ...READ MORE

Aug 8, 2018 in Blockchain by digger
• 26,740 points
2,302 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
1,303 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
1,045 views
+2 votes
1 answer

How to store data in Hyperledger Fabric after restart?

When you use docker-compose down, all the ...READ MORE

Jul 27, 2018 in Blockchain by digger
• 26,740 points
2,731 views
0 votes
2 answers

Trying to issue tokens on testnet with python API

By looking at - documentation here I think you ...READ MORE

Sep 17, 2018 in Blockchain by Khush
514 views
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1 answer

Blockchain ToBTC API not returning Php variable

Seems like you have a syntax error ...READ MORE

Sep 20, 2018 in Blockchain by digger
• 26,740 points
418 views
0 votes
1 answer

Hyperledger fabric node sdk deploy.js example failing

Have you installed couchdb? Install couchdb as ...READ MORE

Sep 17, 2018 in Blockchain by slayer
• 29,350 points
551 views
0 votes
1 answer

How to Read multiple value from as JSON format from a external service and store in composer registry

Hey buddy,  this works: /** * Track temperatures ...READ MORE

Sep 19, 2018 in Blockchain by digger
• 26,740 points
459 views
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1 answer

How to get iota balance via api url?

Either run your own node (thus, the localhost reference ...READ MORE

Sep 12, 2018 in Blockchain by digger
• 26,740 points
760 views
0 votes
1 answer

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
• 29,350 points
2,785 views
0 votes
1 answer

Syntax Error running on Python

You are missing the closing parenthesis: hashlib.sha256(self.index + ...READ MORE

Sep 21, 2018 in Blockchain by digger
• 26,740 points
359 views
0 votes
2 answers

VBA code leads to #value! in cell but works in immediate box

Function GetPrice(strTicker As String, Optional dtDate As ...READ MORE

Sep 10, 2018 in Blockchain by Garry
789 views
+2 votes
1 answer

Has Blockchain made illegal activities easier?

Not really.. The transparency of Blockchain makes ...READ MORE

Sep 20, 2018 in Blockchain by Sumit
304 views
0 votes
1 answer

Litecoin/Bitcoin how divide uint256 target value on difficulty in C++

This is the solution: void setdouble(double val) { ...READ MORE

Sep 12, 2018 in Blockchain by digger
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732 views
0 votes
1 answer

When trying to Start the membersrvc, its not responding!

You should start membersrvc at first in ...READ MORE

Sep 19, 2018 in Blockchain by Christine
• 15,790 points
426 views
0 votes
1 answer

How do I withdraw the balance from a contract on Ethereum test blockchain?

Your need to improvise your code a ...READ MORE

Aug 3, 2018 in Blockchain by Perry
• 17,100 points
2,443 views
0 votes
1 answer

How to use ethereum contract's state changing method in javascript?

You'll find that the message is indeed ...READ MORE

Sep 11, 2018 in Blockchain by Christine
• 15,790 points
759 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
1,273 views
0 votes
1 answer

GDAX Heartbeat Channel: Failed to subscribe error

You to include "product_ids" : ["BTC-GBP"] as a field ...READ MORE

Sep 7, 2018 in Blockchain by digger
• 26,740 points
927 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
1,122 views
0 votes
1 answer

How to get results by running the voting code on Ethereum?

In mist go to your contract and ...READ MORE

Sep 18, 2018 in Blockchain by digger
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442 views
0 votes
1 answer

How to solve “ltdl.h: No such file or directory” error?

It seems like you are missing header ...READ MORE

Jul 26, 2018 in Blockchain by slayer
• 29,350 points
2,771 views
0 votes
1 answer

Javascript: cant update assets in for-loop

Your for-loop will not wait for the ...READ MORE

Sep 17, 2018 in Blockchain by slayer
• 29,350 points
477 views
0 votes
1 answer

Websockets for Block.io API giving an error message

Try something like this: https://jsfiddle.net/bxw3v8c7/ <html> <script src="http://code.jquery.com/jquery-1.11.0.min.js"></script> <script> var btcs = ...READ MORE

Sep 10, 2018 in Blockchain by slayer
• 29,350 points
779 views
0 votes
1 answer

How to decrypt result of query when using the Hyperledger Client SDK for Node.js

In this case, it is just a ...READ MORE

Sep 18, 2018 in Blockchain by slayer
• 29,350 points
429 views
0 votes
1 answer

How to get all address and send ethers in solidity using a loop?

I found a similar code somewhere: contract  Holders{ uint ...READ MORE

Jul 31, 2018 in Blockchain by digger
• 26,740 points
2,541 views
0 votes
1 answer

Public key encoding changes

You are printing the memory address of ...READ MORE

Sep 19, 2018 in Blockchain by Christine
• 15,790 points
377 views
0 votes
1 answer

Bitcoin private key: translate from bash to perl

use bignum; # Get arbitrary precision arithmetic # ...READ MORE

Sep 4, 2018 in Blockchain by slayer
• 29,350 points
1,016 views
0 votes
1 answer

Cannot download fabric-sdk-go.

This happens and I know how frustrating ...READ MORE

Sep 18, 2018 in Blockchain by digger
• 26,740 points
386 views
0 votes
1 answer

Not getting correct result after SHA256

You have to: Hash with SHA-256 the public key: 0450863AD64A87AE8A2FE83C1AF1A8403CB53F53E486D8511DAD8A04887E5B23522CD470243453A299FA9E77237716103ABC11A1DF38855ED6F2EE187E9C582BA6 Hash with RIPEMD-160 the ...READ MORE

Sep 11, 2018 in Blockchain by digger
• 26,740 points
677 views
0 votes
1 answer

client_id in Bitstamp's API

You can use this Ruby code: require 'open-uri' require ...READ MORE

Sep 3, 2018 in Blockchain by digger
• 26,740 points
1,013 views
0 votes
1 answer

PHP. Bitcoin to Ukrainian Hrivna price ticker

nstead of dividing the values - i ...READ MORE

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

Running blockchain script in a one liner

This is a direct translation of the ...READ MORE

Sep 18, 2018 in Blockchain by slayer
• 29,350 points
359 views
0 votes
1 answer

Web3 ethereum miner_start not implemented.

You have to first enable "miner" API ...READ MORE

Aug 24, 2018 in Blockchain by digger
• 26,740 points
1,429 views
0 votes
1 answer

CompleteableFuture in a loop contruct in a private Ethereum Blockchain

You might be able to benefit from ...READ MORE

Sep 14, 2018 in Blockchain by slayer
• 29,350 points
512 views
0 votes
1 answer

Korbit api with python http.client

http.client.HTTPSConnection accepts hostname, not a url. conn = http.client.HTTPSConnection("api.korbit.co.kr", ...READ MORE

Aug 28, 2018 in Blockchain by digger
• 26,740 points
1,238 views
0 votes
1 answer

What's the difference between ethereum and chain?

Ethereum is an open source blockchain platform ...READ MORE

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

How to see bitcoin transaction info?

You can view foreign transactions using bitcoind. Set txindex=1 in ...READ MORE

Aug 17, 2018 in Blockchain by digger
• 26,740 points
1,703 views
0 votes
1 answer

Trying to understand nbits value from stratum protocol

You are right, nbits is current network difficulty. Difficulty encoding ...READ MORE

Sep 3, 2018 in Blockchain by Perry
• 17,100 points
964 views
0 votes
1 answer

Retrieve epay.info Balance with VBA and Excel

This code should log you in, provided ...READ MORE

Sep 5, 2018 in Blockchain by digger
• 26,740 points
876 views
0 votes
1 answer

How to resolve blockchain DNS using Python Requests?

You could use one of their publicly ...READ MORE

Aug 20, 2018 in Blockchain by Omkar
• 69,210 points
1,627 views
0 votes
1 answer

python3 pip not working

The name of your package in PyPI ...READ MORE

Sep 4, 2018 in Blockchain by slayer
• 29,350 points
899 views
0 votes
1 answer

How to generate new address for blockchain wallet?

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

Jul 16, 2018 in Blockchain by digger
• 26,740 points
3,051 views
0 votes
1 answer

Javascript mBTC to BTC conversion not working

At the beginning of bitcoinConversion() you have: if (currentUnit != ...READ MORE

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

Blockchain Hyperledger private key not able to send coins

From the code you posted, if(whichType == TX_SCRIPTHASH){//pay ...READ MORE

Sep 14, 2018 in Blockchain by digger
• 26,740 points
443 views
0 votes
1 answer

How to return Google protobuff object using python Django

Protocol buffer is a binary format. You ...READ MORE

Sep 3, 2018 in Blockchain by digger
• 26,740 points
914 views
0 votes
2 answers

Saving a string in python associated with an API

You can create a list and add ...READ MORE

Sep 10, 2018 in Blockchain by Joy
568 views
0 votes
1 answer

Kraken Api, withdrawal issue “Invalid asset”

asset need to be specified as lowercase, so you ...READ MORE

Aug 29, 2018 in Blockchain by Sumit
1,112 views
0 votes
1 answer

Cant install python module for python3.6 to use Jsonrpc for altcoin

Try this  VERSION=0.1 python3 setup.py install and there's also ...READ MORE

Sep 7, 2018 in Blockchain by digger
• 26,740 points
724 views
0 votes
1 answer

How to interact with smart contract in GO?

I am providing an example. Modify it ...READ MORE

Jul 26, 2018 in Blockchain by digger
• 26,740 points
2,582 views