Trending questions in Blockchain

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composer network start with error SERVICE_UNAVAILABLE

I think there is an issue with ...READ MORE

Jul 5, 2018 in Blockchain by ariaholic
• 7,340 points
121 views
0 votes
0 answers

Blockchain.info wallet API callback

I am implementing blockchain.info wallet api to ...READ MORE

Jul 4, 2018 in Blockchain by sabby
• 4,350 points
204 views
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1 answer

Use of command : ./teardownFabric.sh

Note that if you've run the teardown ...READ MORE

Jul 6, 2018 in Blockchain by Perry
• 17,020 points
82 views
0 votes
2 answers

Can a blockchain be used to verify or store a document on the blockchain?

This link could help you. READ MORE

Aug 28, 2018 in Blockchain by Suman
90 views
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1 answer

How to test endorsement policy for the business network in multiple organizations

Give the proposal responses you are receiving ...READ MORE

Jul 5, 2018 in Blockchain by ariaholic
• 7,340 points
88 views
0 votes
1 answer

How to efficiently hash (SHA 256) in golang data where only the last few bytes changes

You can try the following examples on ...READ MORE

Jun 27, 2018 in Blockchain by ariaholic
• 7,340 points
435 views
0 votes
1 answer

How is consensus reached when there are only two peers in Hyperledger Fabric?

The consensus is achieved in the ordering ...READ MORE

Jul 5, 2018 in Blockchain by digger
• 26,550 points
95 views
0 votes
1 answer

Where can I find the reference format for crypto-config.yaml and configtx.yaml Hyperledger Fabric files?

The sample config files in the Hyperledger Fabric main ...READ MORE

Jun 27, 2018 in Blockchain by ariaholic
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438 views
0 votes
1 answer

Generic put and get in hyperledger fabric

For this, you have to write a ...READ MORE

Jul 6, 2018 in Blockchain by digger
• 26,550 points
46 views
0 votes
1 answer

How can i copy block aspects in hyperledger fabric?

There are three ways you can do ...READ MORE

Jul 6, 2018 in Blockchain by digger
• 26,550 points
45 views
0 votes
1 answer

How do I add multiple recipients for transactions via Blockchain API?

Convert the recipes into JSON objects. x = ...READ MORE

Jul 6, 2018 in Blockchain by Perry
• 17,020 points
42 views
0 votes
1 answer

How to define different privacy for different users in Fabric 1.0?

The privacy restriction to particular peers in ...READ MORE

Jul 6, 2018 in Blockchain by digger
• 26,550 points
41 views
0 votes
1 answer

How to prevent the smart contract from being modified and deployed in the blockchain network?

To expand on Matthew's answer, each state ...READ MORE

Jul 5, 2018 in Blockchain by ariaholic
• 7,340 points
58 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
• 29,170 points
71 views
+1 vote
2 answers

How can a public proof of work be secured?

Bitcoin was the first implementation of blockchain, ...READ MORE

May 9, 2018 in Blockchain by Johnathon
• 9,080 points
49 views
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1 answer

IRS demo Scheduled Event - InitiationHandler

The TODO you are looking for has ...READ MORE

Jul 6, 2018 in Blockchain by slayer
• 29,170 points
19 views
0 votes
1 answer

"set RNG(RandomUtils.Random) before generating random numbers" error

Use the following code, you just have ...READ MORE

Jul 5, 2018 in Blockchain by slayer
• 29,170 points
60 views
0 votes
1 answer

How to create a ‘feeless’ ERC20 token?

You can't have another address pay for ...READ MORE

Jul 5, 2018 in Blockchain by ariaholic
• 7,340 points
43 views
0 votes
1 answer

Error: Error trying to ping. Error: Error trying to query business network. Error: Connect Failed

Run the following commandbefore updating: composer network start ...READ MORE

Jun 28, 2018 in Blockchain by Perry
• 17,020 points
356 views
+1 vote
2 answers

What if a bitcoin clients could create identical private keys?

If this happens, then Person B will ...READ MORE

Aug 28, 2018 in Blockchain by Evan
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0 votes
1 answer

"could not find test.properties" error in Hyperledger v1.0

There is no java sdk for your ...READ MORE

Jul 5, 2018 in Blockchain by digger
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42 views
0 votes
1 answer

IBM Blockchain cant retrieving multiple rows from table

You can not use the older implementation ...READ MORE

Jul 5, 2018 in Blockchain by digger
• 26,550 points
29 views
0 votes
1 answer

difference between running docker image in and outside of vagrant

Most people recommend to run docker containers ...READ MORE

Jul 5, 2018 in Blockchain by digger
• 26,550 points
28 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
• 67,660 points
354 views
0 votes
0 answers

Identification of purchased product

I have created coins on test network.Now ...READ MORE

Jul 5, 2018 in Blockchain by charlie_brown
• 7,720 points
38 views
0 votes
1 answer

Hyperledge fabric v0.6 querying states between a period range

The Hyperledge fabric v0.6 does not provide ...READ MORE

Jul 4, 2018 in Blockchain by digger
• 26,550 points
51 views
0 votes
1 answer

How to change "gasLimit" on Azure private blockchain?

Before deploying your network on Azure you ...READ MORE

Jul 3, 2018 in Blockchain by Omkar
• 67,660 points
92 views
0 votes
1 answer

How to make transactions without creating assets in multichain?

To transfer your Mycoins, you can make ...READ MORE

Jul 3, 2018 in Blockchain by Omkar
• 67,660 points
75 views
0 votes
1 answer

Geth 'sendTransaction' not working

When transactions are put in a loop, ...READ MORE

Jul 3, 2018 in Blockchain by Omkar
• 67,660 points
72 views
0 votes
2 answers

Why does not India consider Bitcoin as a legal tender?

to be specific there are few logical ...READ MORE

Jul 2, 2018 in Blockchain by Priyaj
• 56,920 points
74 views
0 votes
1 answer

How to hold back KYC reward until the end of the ICO Crowdsale?

Your contract contains two functions - the payable function which ...READ MORE

Jul 4, 2018 in Blockchain by Christine
• 15,790 points
66 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
• 67,660 points
303 views
0 votes
1 answer

How ordering nodes synchronize work?

To prevent time-based retention and prevent expiring ...READ MORE

Jul 3, 2018 in Blockchain by Omkar
• 67,660 points
48 views
0 votes
1 answer

Network issue while testing Chaincode.

You can do the following things: You can ...READ MORE

Jul 3, 2018 in Blockchain by Omkar
• 67,660 points
41 views
0 votes
1 answer

How to remove the previous BlockChain data?

One of the reasons preventing the blockchain ...READ MORE

Jul 3, 2018 in Blockchain by Omkar
• 67,660 points
42 views
0 votes
1 answer

repository hyperledger/fabric-tools not found: does not exist or no pull access

You can manually pull this (and any ...READ MORE

Jul 2, 2018 in Blockchain by charlie_brown
• 7,720 points
61 views
0 votes
1 answer

Who is miners in smart contracts?

Proof of work is used as a ...READ MORE

Jul 3, 2018 in Blockchain by Omkar
• 67,660 points
30 views
0 votes
1 answer

How to control a malicious user in hyperledger fabric?

Fabric is an implementation of blockchain. Blockchain ...READ MORE

Jun 29, 2018 in Blockchain by Omkar
• 67,660 points
198 views
+1 vote
2 answers

How can I use blockhain for storing a proof of a document such as an image?

Yes, you're right. Saving entire image in ...READ MORE

Aug 28, 2018 in Blockchain by hakusaro
47 views
0 votes
1 answer

How can I use IBM blockchain to store data?

I would recommend looking at the Fabric ...READ MORE

Jul 2, 2018 in Blockchain by charlie_brown
• 7,720 points
39 views
0 votes
1 answer

Blockchain/decentralized apps development intro

If you are looking for books, try ...READ MORE

Jul 2, 2018 in Blockchain by charlie_brown
• 7,720 points
29 views
0 votes
1 answer

Hyperledger Fabric 1.0 how to maintain privacy from OSNs?

Yes, OSNs can see all the transaction ...READ MORE

Jul 2, 2018 in Blockchain by Omkar
• 67,660 points
35 views
0 votes
1 answer

How do i deploy a contract using bigchainDB?

Currently BigchainDB v.1.0.0 does not support Smart ...READ MORE

Jun 29, 2018 in Blockchain by Shashank
• 10,350 points
133 views
0 votes
1 answer

How to retrieve data from a block to a blockchain?

web3.eth.getTransaction(txHash) will returns transaction details like blockHash, transactionIndex, ...READ MORE

Jun 26, 2018 in Blockchain by Perry
• 17,020 points
243 views
0 votes
1 answer

Where is the data stored in blockchain?

The smart contract is just the business ...READ MORE

Jun 29, 2018 in Blockchain by slayer
• 29,170 points
112 views
+1 vote
1 answer

Does the client know which peer approves/supports its transaction in Hyperledger Fabric?

Yes, client is aware of the endorsing ...READ MORE

Jun 27, 2018 in Blockchain by Omkar
• 67,660 points
147 views
0 votes
2 answers

Hyperledger Fabric Bluemix not accepting logins.

The error is caused because your certificate ...READ MORE

Jun 29, 2018 in Blockchain by Omkar
• 67,660 points
61 views
0 votes
1 answer

Handling connection of new nodes in Decentralized Chatting application.

Libp2p handles discovery and connection of nodes ...READ MORE

Jun 29, 2018 in Blockchain by Omkar
• 67,660 points
67 views
0 votes
1 answer

How can I get into the development of blockchain decentralized applications?

try Microsoft Blockchain as a service, they ...READ MORE

Jun 29, 2018 in Blockchain by Shashank
• 10,350 points
37 views
0 votes
1 answer

How to create tokens in smart contracts from node.js?

Any modification to the Ethereum Blockchain will ...READ MORE

Jun 26, 2018 in Blockchain by Shashank
• 10,350 points
167 views