Recent questions tagged solidity

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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 • 3,233 views
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Solidity: logical AND outputs parser error

Oct 12, 2018 in Blockchain by sabby
 • 4,370 points • 2,857 views
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1 answer

How do Ethereum node compete for blocks?

Oct 12, 2018 in Blockchain by sabby
 • 4,370 points • 2,295 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 • 2,599 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 • 9,340 views
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1 answer

Calling function in truffle console error

Oct 10, 2018 in Blockchain by digger
 • 26,740 points • 4,383 views
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1 answer

Transfer the gas value of contract to my own address

Oct 10, 2018 in Blockchain by digger
 • 26,740 points • 1,660 views
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1 answer

Creating an account with web3.js v0.2.6

Oct 9, 2018 in Blockchain by digger
 • 26,740 points • 1,763 views
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1 answer

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

Oct 9, 2018 in Blockchain by slayer
 • 29,370 points • 1,608 views
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1 answer

I am not able to change array elements globally

Oct 9, 2018 in Blockchain by slayer
 • 29,370 points • 1,779 views
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1 answer

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

Oct 9, 2018 in Blockchain by slayer
 • 29,370 points • 3,846 views
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1 answer

Solidity ParserError: Expected identifier but got '='

Oct 9, 2018 in Blockchain by slayer
 • 29,370 points • 11,683 views
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1 answer

Solidity different token price

Oct 8, 2018 in Blockchain by digger
 • 26,740 points • 2,003 views
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1 answer

Truffle migration error (test rpc is running)

Oct 3, 2018 in Blockchain by digger
 • 26,740 points • 1,938 views
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1 answer

How do I initialize an array in a struct

Oct 1, 2018 in Blockchain by sabby
 • 4,370 points • 4,278 views
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2 answers

Modifiers in solidity

Oct 1, 2018 in Blockchain by digger
 • 26,740 points • 3,660 views
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1 answer

How to fix browser/IERC20.sol:4:53: Warning: This declaration shadows an existing declaration

Oct 1, 2018 in Blockchain by digger
 • 26,740 points • 3,014 views
0 votes
1 answer

How to call function in one contract from another contract in private blockchain?

Oct 1, 2018 in Blockchain by slayer
 • 29,370 points • 2,318 views
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Solidity mocha : address is not a contract error

Oct 1, 2018 in Blockchain by slayer
 • 29,370 points • 2,633 views
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1 answer

How to get value from solidity contract using java?

Sep 28, 2018 in Blockchain by digger
 • 26,740 points • 3,323 views
0 votes
1 answer

Can't call contract function in truffle console

Sep 28, 2018 in Blockchain by digger
 • 26,740 points • 4,537 views
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1 answer

How to achieve simple OOP in Solidity?

Sep 27, 2018 in Blockchain by digger
 • 26,740 points • 2,017 views
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1 answer

How do I compile a piece of Solidity Code using eris' javascript?

Sep 27, 2018 in Blockchain by slayer
 • 29,370 points • 2,413 views
+1 vote
1 answer

Deploy contract using solcjs

Sep 26, 2018 in Blockchain by digger
 • 26,740 points • 2,206 views
+1 vote
1 answer

Solidity: Sending ERC20 Tokens

Sep 26, 2018 in Blockchain by digger
 • 26,740 points • 2,735 views
0 votes
1 answer

Solidity: How can I return a list of user-defined function?

Sep 26, 2018 in Blockchain by slayer
 • 29,370 points • 2,739 views
0 votes
2 answers

Warning: Using contract member “balance” inherited from the address type is deprecated. Solidity

Sep 25, 2018 in Blockchain by digger
 • 26,740 points • 2,729 views
0 votes
3 answers

String conversion to Array in Solidity

Sep 25, 2018 in Blockchain by slayer
 • 29,370 points • 5,974 views
0 votes
1 answer

How to set token price in solidity?

Sep 25, 2018 in Blockchain by digger
 • 26,740 points • 10,789 views
0 votes
1 answer

Ethereum call contract method that emits an event, from another contract

Sep 25, 2018 in Blockchain by slayer
 • 29,370 points • 3,844 views
0 votes
1 answer

Call contract methods with web3 from newly created account

Sep 25, 2018 in Blockchain by slayer
 • 29,370 points • 7,780 views
0 votes
1 answer

How to detect if an ethereum address is an ERC20 token contract?

Sep 25, 2018 in Blockchain by sabby
 • 4,370 points • 9,080 views
0 votes
1 answer

Getting the length of public array variable (getter)

Sep 24, 2018 in Blockchain by slayer
 • 29,370 points • 3,693 views
0 votes
4 answers

Unable to run truffle@2.1.2 migrate --network live. “Exceeds block gas limit”

Sep 24, 2018 in Blockchain by digger
 • 26,740 points • 4,006 views
+1 vote
3 answers

What is the pattern for handling throw on a Solidity contract in tests

Sep 24, 2018 in Blockchain by slayer
 • 29,370 points • 3,678 views
0 votes
3 answers

UnhandledPromiseRejectionWarning: Error: The contract code couldn't be stored, please check your gas limit

Sep 24, 2018 in Blockchain by digger
 • 26,740 points • 3,313 views
0 votes
1 answer

Test ethereum Event Logs with truffle

Sep 21, 2018 in Blockchain by digger
 • 26,740 points • 3,405 views
0 votes
1 answer

Are there null like thing in solidity

Sep 21, 2018 in Blockchain by slayer
 • 29,370 points • 3,472 views
0 votes
1 answer

String concatenation in solidity?

Sep 21, 2018 in Blockchain by digger
 • 26,740 points • 4,403 views
0 votes
1 answer

Solidity, javascript Wrong format: invalid address

Sep 17, 2018 in Blockchain by slayer
 • 29,370 points • 2,644 views
0 votes
1 answer

Calling functions from other contracts solidity

Sep 17, 2018 in Blockchain by slayer
 • 29,370 points • 2,704 views
0 votes
1 answer

Access multiple return values (a, b, c) from solidity function in web3js

Sep 14, 2018 in Blockchain by digger
 • 26,740 points • 4,315 views
0 votes
1 answer

Invalid opcode error in a simple Solidity contract and script

Sep 14, 2018 in Blockchain by digger
 • 26,740 points • 7,054 views
0 votes
1 answer

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

Sep 11, 2018 in Blockchain by sabby
 • 4,370 points • 2,477 views
0 votes
1 answer

Truffle tests not running after truffle init

Sep 11, 2018 in Blockchain by sabby
 • 4,370 points • 4,954 views
0 votes
1 answer

Solidity invalid opcode error

Aug 16, 2018 in Blockchain by digger
 • 26,740 points • 4,653 views
0 votes
1 answer

Solidity difference array with and without new keyword.

Aug 16, 2018 in Blockchain by slayer
 • 29,370 points • 3,400 views
0 votes
1 answer

How to get return value from solidity contract?

Aug 16, 2018 in Blockchain by digger
 • 26,740 points • 6,565 views
0 votes
1 answer

Function not working from class

Aug 16, 2018 in Blockchain by slayer
 • 29,370 points • 1,948 views
0 votes
1 answer

How to call smart contract methods from transactions?

Aug 13, 2018 in Blockchain by digger
 • 26,740 points • 2,998 views
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