Trending questions in Blockchain

0 votes
1 answer

Bitcoin sendfrom does not process transaction

Try this; $wammount = floatval(trim($_POST['wammount'])); READ MORE

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

Hyperledger error while installing binaries

This seems like a problem with the ...READ MORE

Aug 9, 2018 in Blockchain by digger
• 26,740 points
1,431 views
0 votes
1 answer

'ppa:ethereum' error while installing ethereum on ubuntu

First try: sudo apt-get install --reinstall ca-certificates If ...READ MORE

Jul 12, 2018 in Blockchain by slayer
• 29,350 points
2,629 views
0 votes
1 answer

How to generate coin address using bitcoin-ruby?

The only difference between the addresses is ...READ MORE

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

How to create address in BitcoinLib.

Regarding this specific library and assuming that ...READ MORE

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

How to get amount of bitcoins in php?

I’ve tried this code and it works: <?php function ...READ MORE

Aug 24, 2018 in Blockchain by slayer
• 29,350 points
748 views
0 votes
1 answer

Fatal error while installing web3 node.

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

Aug 10, 2018 in Blockchain by digger
• 26,740 points
1,349 views
0 votes
1 answer

BitcoinJ instance shutting down before transaction confirmation

Instead of attaching to an individual transaction ...READ MORE

Aug 31, 2018 in Blockchain by Christine
• 15,790 points
417 views
0 votes
1 answer

Truffle Error: Migrations contract constructor expected

You are not using constructor() public { ...READ MORE

Aug 10, 2018 in Blockchain by digger
• 26,740 points
1,327 views
0 votes
1 answer

mingw32 set command not working

From standard cmd, the unquoted original works just ...READ MORE

Aug 31, 2018 in Blockchain by slayer
• 29,350 points
407 views
0 votes
1 answer

How can i extract information from Ethereum blockchain using python?

Give the RPC (--rpc) option when you ...READ MORE

Jul 31, 2018 in Blockchain by Shashank
• 10,400 points
1,745 views
0 votes
1 answer

Hyperledger Blockchain Explorer “'Error: no test specified' ” error

You have run the npm install command ...READ MORE

Aug 9, 2018 in Blockchain by digger
• 26,740 points
1,355 views
+1 vote
1 answer

How to generate Bitcoin address?

Convert the hex string back to bytes ...READ MORE

Aug 20, 2018 in Blockchain by slayer
• 29,350 points
823 views
0 votes
1 answer

Creating bitcoin address in ruby

When you calculate the SHA256 checksum, make ...READ MORE

Aug 28, 2018 in Blockchain by slayer
• 29,350 points
515 views
0 votes
1 answer

Different unicode versions on various devices

Apparently this is not possible since you ...READ MORE

Aug 29, 2018 in Blockchain by Christine
• 15,790 points
499 views
0 votes
1 answer

Bitcoind server connection problem

Be sure to allow your server ip ...READ MORE

Aug 23, 2018 in Blockchain by digger
• 26,740 points
731 views
0 votes
1 answer

Can I fork an existing blockchain?

You know it's important to realize what ...READ MORE

Aug 31, 2018 in Blockchain by Christine
• 15,790 points
399 views
0 votes
1 answer

MtGox Gem Failing to Login

Try using a smaller nonce for v1 ...READ MORE

Aug 31, 2018 in Blockchain by slayer
• 29,350 points
368 views
0 votes
1 answer

Problem in QRL (Quantum Resistant Node) startup

There is an open issue in GitHub ...READ MORE

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

How to check payment in Blockchain.info wallet?

The above error is probably occurring due ...READ MORE

Aug 21, 2018 in Blockchain by Perry
• 17,100 points
894 views
0 votes
1 answer

obfuscating and deobfuscating a string in JavaScript

You can use btoa() and atob(). btoa() is like base64_encode() and atob() like base64_decode(). Here is an example: btoa('Some ...READ MORE

Aug 23, 2018 in Blockchain by slayer
• 29,350 points
705 views
0 votes
1 answer

Error while running curl command in Docker Quickstart Terminal

You can get the new version of ...READ MORE

Jul 12, 2018 in Blockchain by slayer
• 29,350 points
2,512 views
0 votes
1 answer

Bitcoinjs browser compile creates an empty file

Try the following: Create index.js with the ...READ MORE

Aug 30, 2018 in Blockchain by digger
• 26,740 points
388 views
0 votes
1 answer

How to configure diverse workloads and tasks?

Golem appears to be in early stages of ...READ MORE

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

How to receive JSON object via POST method?

You need to decode it with json_decode() like this $json ...READ MORE

Aug 28, 2018 in Blockchain by slayer
• 29,350 points
444 views
0 votes
1 answer

Problem installing bitcoin wallet in Ubuntu.

You install Bitcoind using the following commands: sudo ...READ MORE

Aug 22, 2018 in Blockchain by slayer
• 29,350 points
699 views
0 votes
1 answer

Real time refreshing app using Angular2

You can use client side normal polling. ...READ MORE

Aug 27, 2018 in Blockchain by digger
• 26,740 points
476 views
0 votes
1 answer

OpenSSL i2o_ECPublicKey not working

When your right something in the buffer, ...READ MORE

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

Cant connect Jsonrpc to bitcoin.

I tried the following code and it ...READ MORE

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

Comparing hex representation of 2 BigIntegers

You can compare two sequences of equal ...READ MORE

Aug 27, 2018 in Blockchain by digger
• 26,740 points
468 views
0 votes
1 answer

How to retain the container state after shutdown/restart of Hyperledger Fabric network?

In a Dev environment, you can first ...READ MORE

Jul 17, 2018 in Blockchain by slayer
• 29,350 points
2,206 views
0 votes
1 answer

How to extract h160 address of bitcoin blockchain?

You can extract the data using the ...READ MORE

Jul 16, 2018 in Blockchain by digger
• 26,740 points
2,243 views
0 votes
1 answer

How to open bitcoin-qt wallet with bitcoinj?

I found this issue solved at the ...READ MORE

Aug 24, 2018 in Blockchain by slayer
• 29,350 points
541 views
0 votes
1 answer

“Error getting chaincode package bytes” when deploying chaincode on hyperledger via REST

Considering that you are playing with Bluemix ...READ MORE

Aug 3, 2018 in Blockchain by charlie_brown
• 7,720 points
1,437 views
0 votes
1 answer

Error while generating smart contracts which returns array of struct in Web3j v3.3.1

Solidity does not support returning structs in ...READ MORE

Jul 26, 2018 in Blockchain by Perry
• 17,100 points
1,782 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
• 29,350 points
826 views
0 votes
1 answer

How to add Bitcoin as currency for my website?

You cannot use BTC as the currency ...READ MORE

Aug 17, 2018 in Blockchain by slayer
• 29,350 points
822 views
0 votes
2 answers

Python syntax error because of version conflicts.

As mentioned in the reply to my ...READ MORE

Aug 13, 2018 in Blockchain by Omkar
• 69,210 points
936 views
+1 vote
2 answers

HyperLedger Fabric Java SDK - Wrinting the ChainCode Sample in Java

To get started developing Java chaincode Ensure you ...READ MORE

Aug 3, 2018 in Blockchain by Omkar
• 69,210 points
3,952 views
0 votes
1 answer

Why RLP encoding is used in Ethereum?

RLP is intended to be a highly ...READ MORE

Aug 4, 2018 in Blockchain by Mohini
• 260 points
1,427 views
0 votes
1 answer

How do I validate the presence of participant owner in Asset transfer transaction?

I found the exact solution and syntax.. ...READ MORE

Aug 9, 2018 in Blockchain by aryya
• 7,450 points
1,164 views
0 votes
1 answer

How to solve “Package 'ethereum' has no installation candidate” error?

This error might have occurred because your ...READ MORE

Aug 8, 2018 in Blockchain by slayer
• 29,350 points
1,179 views
0 votes
1 answer

NBitcoin throws InvalidOperationException with the message: “Mac HMACSHA256 not recognised.”

If someone would like to figure out ...READ MORE

Aug 27, 2018 in Blockchain by digger
• 26,740 points
351 views
0 votes
1 answer

Cant make transactions in bitcoind.

Fist you should encrypt your wallet: bitcoin-cli encryptwallet ...READ MORE

Aug 23, 2018 in Blockchain by slayer
• 29,350 points
524 views
0 votes
1 answer

How to solve Yobit API connection 503 server error?

Try to use "https://www.yobit.net/api/3/info" URL Instead of ...READ MORE

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

What is approve and allowance method?

approve(): This method is used by one ...READ MORE

Jul 30, 2018 in Blockchain by digger
• 26,740 points
1,581 views
+1 vote
1 answer

How to perform a simple 1-to-1 Bitcoin Transaction with Bitcore?

What is the argument utxos int the ...READ MORE

Jul 20, 2018 in Blockchain by charlie_brown
• 7,720 points
1,941 views
0 votes
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
• 17,100 points
1,722 views
0 votes
1 answer

What is the difference between o and --> in Fabric Composer?

'o' indicates has-a relationship '-->' indicates pass by ...READ MORE

Aug 25, 2018 in Blockchain by Perry
• 17,100 points
450 views
0 votes
1 answer

How to set chaincode path in Hyperledger Fabric?

For chaincode to properly run on your ...READ MORE

Jul 27, 2018 in Blockchain by digger
• 26,740 points
1,664 views