Recent questions tagged blockchain

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What is the default network that truffle migrates to when the config has 2 networks?

Oct 15, 2018 in Blockchain by slayer
 • 29,370 points • 1,666 views
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1 answer

Ethereum nodejs: Contract address returning as undefined in console

Oct 15, 2018 in Blockchain by slayer
 • 29,370 points • 1,901 views
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1 answer

How to save complex object in the contract in solidity

Oct 15, 2018 in Blockchain by slayer
 • 29,370 points • 3,602 views
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1 answer

Solidity geth: Error encountered during contract execution [Bad instruction]

Oct 15, 2018 in Blockchain by slayer
 • 29,370 points • 1,501 views
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UnhandledPromiseRejectionWarning: Insufficient funds error in Ethereum: NodeJS web3

Oct 15, 2018 in Blockchain by slayer
 • 29,370 points • 1,426 views
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1 answer

Solidity: logical AND outputs parser error

Oct 12, 2018 in Blockchain by sabby
 • 4,370 points • 1,727 views
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1 answer

How do Ethereum node compete for blocks?

Oct 12, 2018 in Blockchain by sabby
 • 4,370 points • 882 views
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1 answer

How to force gradle to take UTF-8 encoding instead of operating system default encoding?

Oct 12, 2018 in Blockchain by sabby
 • 4,370 points • 7,360 views
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1 answer

How to input realtime data from google sheets into urlfetch google scripts?

Oct 12, 2018 in Blockchain by sabby
 • 4,370 points • 1,482 views
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4 answers

Issue with getting web3.eth.accounts (MetaMask)

Oct 12, 2018 in Blockchain by sabby
 • 4,370 points • 5,482 views
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1 answer

Is the msg.sender address changed while passing to another contract as a parameter?

Oct 10, 2018 in Blockchain by slayer
 • 29,370 points • 1,377 views
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1 answer

Blockchain: Installing an earlier version of ethereum using apt-get on

Oct 10, 2018 in Blockchain by slayer
 • 29,370 points • 1,445 views
+1 vote
2 answers

Integrating web3 from Metamask: "ReferenceError: window is not defined" error

Oct 10, 2018 in Blockchain by slayer
 • 29,370 points • 7,074 views
0 votes
1 answer

Using json rpc with curl on java?

Oct 10, 2018 in Blockchain by slayer
 • 29,370 points • 2,757 views
0 votes
1 answer

Ethereum generating genesis Python Syntax

Oct 10, 2018 in Blockchain by slayer
 • 29,370 points • 950 views
0 votes
1 answer

Where is the geth.exe in the Ethereum mist?

Oct 10, 2018 in Blockchain by digger
 • 26,740 points • 877 views
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TypeError: XMLHttpRequest is not a function when using web3 on meteor server side

Oct 10, 2018 in Blockchain by digger
 • 26,740 points • 1,107 views
0 votes
1 answer

Getting Invalid number of parameters for “undefined” when deploying smart contract

Oct 10, 2018 in Blockchain by digger
 • 26,740 points • 3,169 views
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1 answer

Calling function in truffle console error

Oct 10, 2018 in Blockchain by digger
 • 26,740 points • 2,899 views
0 votes
1 answer

Transfer the gas value of contract to my own address

Oct 10, 2018 in Blockchain by digger
 • 26,740 points • 595 views
0 votes
1 answer

Store contract results tag in a variable

Oct 9, 2018 in Blockchain by digger
 • 26,740 points • 481 views
0 votes
1 answer

Ethereum: functions Burn and Transfer source

Oct 9, 2018 in Blockchain by digger
 • 26,740 points • 2,118 views
0 votes
1 answer

Etheruem: Unable to import library in Remix IDE

Oct 9, 2018 in Blockchain by digger
 • 26,740 points • 1,665 views
0 votes
1 answer

Creating an account with web3.js v0.2.6

Oct 9, 2018 in Blockchain by digger
 • 26,740 points • 723 views
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1 answer

How to allow request from host machine and deny from other machine, using ethereum in docker?

Oct 9, 2018 in Blockchain by digger
 • 26,740 points • 757 views
0 votes
1 answer

Nodejs Express: Getting different output in console.log and callback

Oct 9, 2018 in Blockchain by slayer
 • 29,370 points • 520 views
0 votes
1 answer

I am not able to change array elements globally

Oct 9, 2018 in Blockchain by slayer
 • 29,370 points • 728 views
0 votes
1 answer

Truffle Compile failing, ParserError: Expected token LParen got Identifier function

Oct 9, 2018 in Blockchain by slayer
 • 29,370 points • 2,530 views
0 votes
1 answer

Getting “web3.eth.filter is not a function” while trying to monitor Ethereum blocks

Oct 9, 2018 in Blockchain by slayer
 • 29,370 points • 2,696 views
0 votes
1 answer

Solidity ParserError: Expected identifier but got '='

Oct 9, 2018 in Blockchain by slayer
 • 29,370 points • 9,562 views
0 votes
1 answer

truffle migrate Error

Oct 8, 2018 in Blockchain by slayer
 • 29,370 points • 1,314 views
0 votes
1 answer

How can I inject and use this javascript library (web3) with JavascriptCore

Oct 8, 2018 in Blockchain by slayer
 • 29,370 points • 971 views
0 votes
1 answer

Get specific JSON data value using array from Coin Market Cap API

Oct 8, 2018 in Blockchain by slayer
 • 29,370 points • 1,893 views
0 votes
1 answer

How to choose which function is called first in Node Js

Oct 8, 2018 in Blockchain by slayer
 • 29,370 points • 627 views
0 votes
1 answer

javascript bytes32 to string

Oct 8, 2018 in Blockchain by slayer
 • 29,370 points • 3,335 views
0 votes
1 answer

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

Oct 8, 2018 in Blockchain by digger
 • 26,740 points • 1,275 views
0 votes
1 answer

What is the difference between creating a new solidity contract with and without the `new` keyword?

Oct 8, 2018 in Blockchain by digger
 • 26,740 points • 1,201 views
0 votes
1 answer

Ethereum, web3, Error: invalid argument 0: cannot unmarshal non-string as hex data, when I call a contract

Oct 8, 2018 in Blockchain by digger
 • 26,740 points • 1,996 views
0 votes
1 answer

Solidity different token price

Oct 8, 2018 in Blockchain by digger
 • 26,740 points • 906 views
0 votes
1 answer

Sending hash in function parameter

Oct 8, 2018 in Blockchain by digger
 • 26,740 points • 817 views
0 votes
1 answer

How can I deploy a hyperledger business network using docker-compose?

Oct 4, 2018 in Blockchain by sabby
 • 4,370 points • 1,485 views
0 votes
1 answer

How to define the path to hyperledger-fabric chaincode?

Oct 4, 2018 in Blockchain by sabby
 • 4,370 points • 1,418 views
0 votes
1 answer

Contract deployment is raising gas issue while transaction and issue vary on various networksbl

Oct 3, 2018 in Blockchain by digger
 • 26,740 points • 754 views
0 votes
1 answer

Error when Installing Ethereum: Package 'ethereum' has no installation candidate

Oct 3, 2018 in Blockchain by slayer
 • 29,370 points • 859 views
0 votes
1 answer

Web is not injected by metamask

Oct 3, 2018 in Blockchain by digger
 • 26,740 points • 962 views
0 votes
1 answer

Truffle migrate fails due to missing function, but it exists in node_modules

Oct 3, 2018 in Blockchain by slayer
 • 29,370 points • 2,029 views
0 votes
1 answer

Access variables through auto-generated getters from a different contract

Oct 3, 2018 in Blockchain by digger
 • 26,740 points • 528 views
0 votes
1 answer

Handling UI when a trasaction is in pending (MetaMask)

Oct 3, 2018 in Blockchain by slayer
 • 29,370 points • 981 views
0 votes
1 answer

Error when trying to deploy Ethereum smart contract using web3j

Oct 3, 2018 in Blockchain by digger
 • 26,740 points • 1,595 views
0 votes
1 answer

What happens to Ether in a smart contract after selfdestruct?

Oct 3, 2018 in Blockchain by slayer
 • 29,370 points • 1,078 views
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