Recent questions tagged smart-contract

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1 answer

How can i import the csv/excel files into my contract and record the transaction ?

Apr 16, 2019 in Blockchain by anonymous
 • 3,127 views
0 votes
1 answer

Solidity, why the used function is placed before the brace "{}" when define a new function?

Apr 3, 2019 in Blockchain by XHQ
 • 882 views
0 votes
1 answer

Installing Solidity on Linux

Feb 28, 2019 in Blockchain by Raghu
 • 2,800 views
0 votes
2 answers

Truffle compile/migrate not working

Feb 7, 2019 in Blockchain by Karuna
 • 2,473 views
0 votes
1 answer

Does Hyperledger support Smart Contract like Ethereum?

Feb 4, 2019 in Blockchain by Roshan
 • 711 views
+1 vote
4 answers

Uncaught Error: Returned values aren't valid, did it run Out of Gas?

Jan 31, 2019 in Blockchain by Amit
 • 7,640 views
0 votes
1 answer

Truffle deployer is not working

Jan 29, 2019 in Blockchain by Sajid
 • 1,117 views
0 votes
1 answer

Cannot read property 'getBlock' of undefined

Jan 29, 2019 in Blockchain by Karuna
 • 1,334 views
0 votes
1 answer

Not able to connect nodes on Ethereum Private Network using bootnodes.

Jan 27, 2019 in Blockchain by Siddu
 • 1,620 views
0 votes
1 answer

Geth console can’t access smart contract

Jan 27, 2019 in Blockchain by Neeraj
 • 847 views
0 votes
1 answer

Variable declaration problem in truffle console.

Jan 27, 2019 in Blockchain by Shreya
 • 1,122 views
0 votes
1 answer

Calling Truffle Commands through a script

Jan 25, 2019 in Blockchain by Vaishnavi
 • 1,095 views
0 votes
1 answer

How to run a Javascript in truffle console?

Jan 24, 2019 in Blockchain by Mamta
 • 2,151 views
0 votes
1 answer

How to call a payable contract function from truffle console?

Jan 24, 2019 in Blockchain by MK Bhat
 • 2,317 views
0 votes
1 answer

Truffle dev says my function is not a function

Jan 24, 2019 in Blockchain by Kapil
 • 1,941 views
0 votes
1 answer

Solidity Error: Exceeds block gas limit

Jan 24, 2019 in Blockchain by Mary
 • 2,601 views
0 votes
1 answer

Truffle can not find artifacts error

Jan 24, 2019 in Blockchain by Saloni
 • 4,635 views
0 votes
1 answer

Unexpected error: Cannot provision contracts while instantiating the console

Jan 23, 2019 in Blockchain by Nimisha
 • 626 views
0 votes
1 answer

Not able to install truffle-contract

Jan 23, 2019 in Blockchain by Piyush
 • 1,902 views
0 votes
1 answer

Solidity: casting address to address payable

Jan 23, 2019 in Blockchain by Kunal
 • 7,569 views
0 votes
1 answer

Error while sending an address to functions

Jan 23, 2019 in Blockchain by Kumar
 • 2,949 views
0 votes
1 answer

Not able to use ERC721 token in my project

Jan 23, 2019 in Blockchain by Sunil
 • 612 views
0 votes
1 answer

How can I call a contract from another contract?

Jan 23, 2019 in Blockchain by Suman
 • 1,530 views
–1 vote
2 answers

Truffle migrate not deploying contract.

Jan 18, 2019 in Blockchain by digger
 • 26,740 points • 8,762 views
0 votes
1 answer

Not able to deploy smart contract to private network

Jan 18, 2019 in Blockchain by slayer
 • 29,350 points • 754 views
0 votes
1 answer

Testrpc can't find log handlers

Jan 18, 2019 in Blockchain by slayer
 • 29,350 points • 499 views
0 votes
1 answer

Truffle "Migrations" ran out of gas error

Jan 17, 2019 in Blockchain by slayer
 • 29,350 points • 3,897 views
0 votes
1 answer

"Migrations" exceeded the block limit (with a gas value you set).

Jan 17, 2019 in Blockchain by slayer
 • 29,350 points • 5,555 views
0 votes
1 answer

"Migrations" -- Returned error: authentication needed: password or unlock.

Jan 17, 2019 in Blockchain by slayer
 • 29,350 points • 3,976 views
0 votes
1 answer

Truffle compile compilation failed

Jan 17, 2019 in Blockchain by slayer
 • 29,350 points • 3,401 views
0 votes
2 answers

Truffle compile: SyntaxError: No visibility specified. Did you intend to add "public"?

Jan 17, 2019 in Blockchain by slayer
 • 29,350 points • 3,609 views
–1 vote
1 answer

Not able to compile truffle project

Jan 17, 2019 in Blockchain by digger
 • 26,740 points • 1,626 views
0 votes
1 answer

How to sync private nodes in geth and testRPC locally?

Jan 16, 2019 in Blockchain by slayer
 • 29,350 points • 1,068 views
0 votes
1 answer

Not able to pull any events in ethereum

Dec 31, 2018 in Blockchain by slayer
 • 29,350 points • 356 views
0 votes
3 answers

Solidity: TypeError: Data location must be "memory" for parameter in function, but none was given.

Dec 12, 2018 in Blockchain by slayer
 • 29,350 points • 4,255 views
0 votes
1 answer

Solidity error: SyntaxError: No visibility specified.

Dec 12, 2018 in Blockchain by slayer
 • 29,350 points • 6,862 views
+1 vote
2 answers

Not able to install Solidity in Ubuntu

Dec 12, 2018 in Blockchain by slayer
 • 29,350 points • 1,618 views
0 votes
1 answer

Can I execute distributions in ERC20 tokens on a later stage?

Nov 2, 2018 in Blockchain by Perry
 • 17,100 points • 636 views
0 votes
1 answer

How to reduce a random hash to a boolean value

Oct 26, 2018 in Blockchain by Prerna
 • 1,960 points • 431 views
0 votes
1 answer

Are Ethereum contract function securable?

Oct 26, 2018 in Blockchain by Prerna
 • 1,960 points • 476 views
0 votes
1 answer

How to get ethereum contract public variables?

Oct 17, 2018 in Blockchain by sabby
 • 4,390 points • 1,702 views
0 votes
1 answer

How to handle smart contract transaction express nodejs?

Oct 15, 2018 in Blockchain by digger
 • 26,740 points • 1,760 views
0 votes
1 answer

Ethereum solidity: Unable to get value from another contract

Oct 15, 2018 in Blockchain by digger
 • 26,740 points • 1,482 views
0 votes
1 answer

How to get value from solidity contract using java?

Sep 28, 2018 in Blockchain by digger
 • 26,740 points • 1,754 views
0 votes
1 answer

How to interact with a Smart Contract on private network using Web3.js?

Aug 22, 2018 in Blockchain by sabby
 • 4,390 points • 1,903 views
0 votes
1 answer

Solidity invalid opcode error

Aug 16, 2018 in Blockchain by digger
 • 26,740 points • 2,914 views
0 votes
1 answer

Solidity difference array with and without new keyword.

Aug 16, 2018 in Blockchain by slayer
 • 29,350 points • 1,440 views
0 votes
1 answer

What if Gas required in my program exceeds the limit of 3000000?

May 29, 2018 in Blockchain by nsv999
 • 5,500 points • 605 views
+1 vote
1 answer

what is use of msg.sender in solidity code?

Apr 25, 2018 in Blockchain by Johnathon
 • 9,090 points • 8,539 views
+3 votes
2 answers

How to run ethereumjs using Node.JS

Mar 27, 2018 in Blockchain by Gabriel
 • 680 points • 970 views
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