Recent questions tagged smart-contract

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1 answer

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

Jul 6, 2018 in Blockchain by charlie_brown
 • 7,720 points • 1,003 views
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1 answer

Updating data of struct to save in chaincode.

Jul 5, 2018 in Blockchain by digger
 • 26,740 points • 1,475 views
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How is consensus reached when there are only two peers in Hyperledger Fabric?

Jul 5, 2018 in Blockchain by slayer
 • 29,370 points • 2,120 views
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How would I run SpringBoot with the Java-SDK of Hyperledger Fabric java daemon?

Jul 4, 2018 in Blockchain by Shashank
 • 10,400 points • 2,622 views
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1 answer

Network issue while testing Chaincode.

Jul 3, 2018 in Blockchain by slayer
 • 29,370 points • 882 views
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1 answer

How to remove the previous BlockChain data?

Jul 3, 2018 in Blockchain by slayer
 • 29,370 points • 1,225 views
0 votes
1 answer

How to change "gasLimit" on Azure private blockchain?

Jul 3, 2018 in Blockchain by slayer
 • 29,370 points • 1,022 views
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1 answer

Who is miners in smart contracts?

Jul 3, 2018 in Blockchain by digger
 • 26,740 points • 1,112 views
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1 answer

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

Jul 3, 2018 in Blockchain by sabby
 • 4,370 points • 901 views
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1 answer

Where is the data stored in blockchain?

Jun 29, 2018 in Blockchain by digger
 • 26,740 points • 1,701 views
+1 vote
1 answer

How to write an ERC 721 contract?

Jun 28, 2018 in Blockchain by sabby
 • 4,370 points • 3,456 views
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1 answer

Can't install remote HTTP chaincode

Jun 27, 2018 in Blockchain by slayer
 • 29,370 points • 1,044 views
+1 vote
2 answers

How to convert INT to STRING in Solidity?

Jun 27, 2018 in Blockchain by sabby
 • 4,370 points • 12,987 views
0 votes
1 answer

How to retrieve data from a block to a blockchain?

Jun 27, 2018 in Blockchain by Johnathon
 • 9,090 points • 4,221 views
+2 votes
1 answer

What are the wallet path credentials for Web3j?

Jun 26, 2018 in Blockchain by Johnathon
 • 9,090 points • 2,262 views
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1 answer

Error: t: Instance org.acme.seller.Car#HW7722 missing required field oldOwner

Jun 21, 2018 in Blockchain by nsv999
 • 5,500 points • 1,634 views
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1 answer

Hyperledger : Deploying chaincode successful. But, cannot query - says ResourceNotFound

Jun 21, 2018 in Blockchain by aryya
 • 7,460 points • 1,195 views
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1 answer

How to make my Dapp work on regular browsers?

Jun 20, 2018 in Blockchain by Perry
 • 17,100 points • 819 views
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1 answer

Web3j v3.3.1 : Error while generating compiled solidity smart contracts which returns array of struct

Jun 19, 2018 in Blockchain by charlie_brown
 • 7,720 points • 1,858 views
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1 answer

Blockchain Usecase - Personal Management Records

Jun 18, 2018 in Blockchain by nsv999
 • 5,500 points • 1,060 views
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1 answer

I need all Ethereum smart contracts

Jun 16, 2018 in Blockchain by aryya
 • 7,460 points • 744 views
0 votes
1 answer

Does each DApp has its own separate Blockchain? Or can we develop multiple DApps on a single Blockchain platform?

Jun 11, 2018 in Blockchain by Perry
 • 17,100 points • 1,532 views
0 votes
2 answers

How to get notified when an event triggers on ethereum smart contract?

Jun 8, 2018 in Blockchain by charlie_brown
 • 7,720 points • 2,618 views
0 votes
1 answer

Unknown MSP DEFAULT error query chaincode

Jun 8, 2018 in Blockchain by Perry
 • 17,100 points • 991 views
0 votes
1 answer

Account not listed in the Deploy Contract screen?

Jun 4, 2018 in Blockchain by Johnathon
 • 9,090 points • 759 views
0 votes
1 answer

Can I swap an ERC-20 token with a Neo NEP5 token using a smart contract?

Jun 4, 2018 in Blockchain by Johnathon
 • 9,090 points • 1,166 views
0 votes
1 answer

How is a request sent from an app to a smart contract?

Jun 4, 2018 in Blockchain by Johnathon
 • 9,090 points • 923 views
0 votes
1 answer

What could be the best term to use for the collection of contracts in a .sol file?

Jun 2, 2018 in Blockchain by Johnathon
 • 9,090 points • 921 views
0 votes
1 answer

where is ethereum contract instance state stored???

Jun 2, 2018 in Blockchain by Johnathon
 • 9,090 points • 787 views
0 votes
1 answer

Can smart contract have token balance?

May 31, 2018 in Blockchain by Perry
 • 17,100 points • 1,598 views
0 votes
1 answer

Can I secretly add numbers in a smart contract and only add sum?

May 30, 2018 in Blockchain by Christine
 • 15,790 points • 971 views
0 votes
1 answer

How do I develop a supply chain DApp on Blockchain?

May 30, 2018 in Blockchain by Christine
 • 15,790 points • 1,700 views
0 votes
1 answer

How do I send back ethers to the sender of the tokens in a smart contract?

May 30, 2018 in Blockchain by Christine
 • 15,790 points • 3,817 views
0 votes
1 answer

How can I synchronize smart contract on blockchain?

May 29, 2018 in Blockchain by Johnathon
 • 9,090 points • 1,277 views
0 votes
1 answer

How can I integrate ethereum wallet on my site??

May 29, 2018 in Blockchain by Johnathon
 • 9,090 points • 3,465 views
0 votes
1 answer

Can there be different smart contract with same logic or a master contract with all configuration?

May 23, 2018 in Blockchain by Shashank
 • 10,400 points • 867 views
0 votes
1 answer

Why do we use virtual machine for running smart contracts.

May 23, 2018 in Blockchain by Shashank
 • 10,400 points • 1,129 views
0 votes
1 answer

Does the contract hosting account owns ether that is being sent to contract too??

May 22, 2018 in Blockchain by Shashank
 • 10,400 points • 816 views
0 votes
1 answer

How can I sync geth and testrpc private nodes locally?

May 17, 2018 in Blockchain by Shashank
 • 10,400 points • 962 views
+1 vote
5 answers

Where does the smart contracts stored and executed on blockchain?

May 3, 2018 in Blockchain by Johnathon
 • 9,090 points • 9,756 views
+1 vote
1 answer

How can nodes interact with a Smart Contract?

Apr 27, 2018 in Blockchain by Johnathon
 • 9,090 points • 1,017 views
0 votes
1 answer

How can I deploy a HelloWorld contract on my testrpc network?

Apr 27, 2018 in Blockchain by Johnathon
 • 9,090 points • 3,326 views
0 votes
2 answers

Why is network already up to date while trying to deploy a contract on truffle?

Apr 24, 2018 in Blockchain by anonymous
 • 4,890 views
+1 vote
1 answer

How does a blockchain work in hyperledger framework?

Apr 19, 2018 in Blockchain by Johnathon
 • 9,090 points • 1,285 views
0 votes
1 answer

Transaction cost variations in one contract vs. multiple contracts

Apr 19, 2018 in Blockchain by Johnathon
 • 9,090 points • 955 views
+1 vote
1 answer

How is it possible to achieve privacy and confidentiality in smart contracts??

Apr 18, 2018 in Blockchain by anonymous
 • 1,139 views
0 votes
1 answer

What is the difference between if() and require() statement in solidity??

Apr 18, 2018 in Blockchain by anonymous
 • 5,286 views
+1 vote
1 answer

Hyperledger - How can I use transaction certificates to enforce privacy?

Apr 17, 2018 in Blockchain by nsv999
 • 5,500 points • 1,101 views
+1 vote
2 answers

Can I include real world data in a smart contract? If so, how?

Apr 10, 2018 in Blockchain by Johnathon
 • 9,090 points • 1,550 views
+1 vote
4 answers

How to estimate the cost for deploying smart contract on mainnet?

Apr 9, 2018 in Blockchain by anonymous
 • 16,406 views
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