Hottest Questions This Month

1

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3

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193

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How does solidity handle mod 0?

solidity modular-arithmetic

modified Sep 15 at 20:51 Paul Berg 2,526

2

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2

answers

157

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Is there a way to deal with desistance in a off-chain game?

games off-chain

answered Sep 8 at 1:33 smarx 21.8k

4

votes

1

answer

109

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What is SMTChecker used for in Solidity?

contract-development smtchecker formal-verification

modified Sep 1 at 15:27 Ismael 17.4k

2

votes

3

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105

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How smart contract transactions work?

contract-development transactions blockchain addresses accounts

answered Aug 31 at 23:44 Rob Hitchens - B9lab 33.4k

0

votes

1

answer

83

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Empty array is being returned

solidity quorum

modified Aug 27 at 6:22 Niklas Feurstein 2,173

4

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2

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48

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Verifying a Token Contract with Interface

solidity remix contract-debugging etherscan verify

answered Aug 31 at 19:05 Niklas Feurstein 2,173

5

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1

answer

51

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When should I use calldata and when should I use memory?

solidity contract-development memory calldata keyword

modified Sep 2 at 17:29 shane 3,831

0

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3

answers

39

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Publish and verify the source contract code in Ethscan. I tried it but it keeps failing. Can anyone help me?

erc-20 etherscan

modified Sep 9 at 15:16 Rob Hitchens - B9lab 33.4k

0

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1

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64

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Verify simple smart contract on etherscan

remix etherscan contract-verification

modified Aug 29 at 20:41 Niklas Feurstein 2,173

0

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2

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52

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Where web3.eth.accounts.create() creates new account?

web3js truffle ganache

answered Aug 27 at 19:25 raj chakravarthy 11

1

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2

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65

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How to check Ethereum smart contract info?

tokens json-rpc contract-debugging accounts rpc

modified Sep 10 at 21:29 Mikhail Vladimirov 2,784

5

votes

2

answers

37

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Pros and Cons of smart contract upgradable patterns

contract-development contract-design openzeppelin delegatecall openzeppelin-sdk

modified Sep 13 at 8:13 abcoathup 701

0

votes

1

answer

121

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FATAL ERROR: Ineffective mark-compacts near heap limit Allocation failed - JavaScript heap out of memory

web3js javascript

modified Aug 29 at 11:41 goodvibration 6,515

1

vote

2

answers

34

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I Call SmartContract Token ERC20, Why Show Hashing Output ? (Web3 + Metamask + Javascript)

solidity blockchain tokens javascript ethereumjs

answered Sep 3 at 1:08 goodvibration 6,515

1

vote

1

answer

56

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Why doesn't Raiden release channel capacity immediately when routing fails?

raiden

answered Sep 4 at 12:42 Augusto Hack 211

1

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2

answers

29

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ERC20 not recognized by TokenTracker

tokens erc-20 openzeppelin openzeppelin-contracts openzeppelin-sdk

answered Sep 2 at 11:34 MovieExpert 21

0

votes

3

answers

60

views

How to build a decentralised Voting Website without using any 3rd party extensions like Metamask, or IDEs like Remix? [closed]

blockchain ethereumjs

modified Sep 1 at 15:40 minsuga 3

0

votes

3

answers

44

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How do I make a smart contract send a message to a user along with a transaction?

solidity contract-development ether message

modified Sep 3 at 10:32 Ytsen de Boer 208

2

votes

3

answers

43

views

How to get the actual time of occurrence for ethereum transaction in block

go-ethereum transactions etherscan web3.py timestamp

answered Aug 28 at 1:59 Maxareo 101

1

vote

2

answers

43

views

Get All Contracts from Blockchain

ether contract-invocation json-rpc etherscan mythril

answered Aug 29 at 23:42 Cryptic 54

0

votes

1

answer

33

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How to remove 2 contracts

contract-deployment

answered Aug 23 at 11:58 Niklas Feurstein 2,173

1

vote

1

answer

53

views

What is DeFi decentralized finance?

tokens exchanges stablecoins defi

modified Sep 6 at 19:37 Nick Sawinyh 46

1

vote

1

answer

85

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Web3 CDN error: regeneratorRuntime is not defined

web3js web3js-v1.x

answered Aug 29 at 16:32 haxerl 508

1

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2

answers

39

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Cannot install web3 on nodejs

solidity remix ethereumj

answered Aug 26 at 22:47 Badr Bellaj♦ 14.9k

0

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1

answer

64

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How to use DAI in my contract

contract-development tokens erc-20 dai

answered Aug 26 at 16:21 phant0m 977

1

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2

answers

78

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How to build the seamless bridge between two blockchain platform?

blockchain private-blockchain oracles

modified Sep 3 at 5:17 Darshan 25

3

votes

1

answer

44

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What are remappings and how do they work in solidity?

contract-development solc import

modified Sep 2 at 12:20 Paul Berg 2,526

0

votes

3

answers

43

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Can we add custom data in ERC20 token?

erc-20 etherscan

modified Sep 4 at 6:38 Lauri Peltonen 8,175

0

votes

0

answers

91

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Remix never returns a transaction - but everything works - why?

solidity remix erc-20

modified Sep 15 at 4:45 Zach 36

4

votes

1

answer

33

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couldnt understand implementaion of UpgradeabilityProxyFactory

solidity web3js truffle openzeppelin-sdk contract-upgrading

modified Aug 29 at 6:36 abcoathup 701

2

votes

1

answer

41

views

Why Ethereum sets user balance to MaxBig256 whenever a contract query is performed?

go-ethereum contract-invocation evm balances uint256

answered Sep 13 at 4:53 Md Rayhanul Masud Saom 164

1

vote

1

answer

38

views

Vyper mapping inside a struct

mapping struct vyper

answered Sep 1 at 8:15 smarx 21.8k

0

votes

1

answer

47

views

How to connect with WebSocket with Web3?

web3js events infura websocket

modified Aug 30 at 19:00 Niklas Feurstein 2,173

0

votes

1

answer

22

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Not getting getPastEvents or once function using contract instance

web3js contract-invocation events nodejs npm

answered Aug 30 at 8:26 Niklas Feurstein 2,173

0

votes

0

answers

75

views

Fatal: Account unlock with HTTP access is forbidden! [closed]

go-ethereum blockchain

asked Aug 27 at 3:22 Mauricio Salgado 1

1

vote

2

answers

35

views

What should I prepare for the coming ETH 2.0 upgrade as a Dapps developer?

proof-of-stake proof-of-work eth-2.0

modified Sep 4 at 6:24 haxerl 508

1

vote

2

answers

43

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invalid bytes32 value - Maker Contract Call

solidity web3js

answered Aug 23 at 16:10 Pat Doyle 98

0

votes

1

answer

33

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Can't transfer ether from contract to another contract ^0.5.0

solidity ether transferfrom

modified Aug 27 at 6:27 Lauri Peltonen 8,175

0

votes

1

answer

33

views

library modifying string vs string literal

solidity string library

modified Sep 3 at 19:03 Niklas Feurstein 2,173

0

votes

1

answer

53

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Web3-core-helpers error: Uncaught (in promise) Error: Provided address “undefined” is invalid,

solidity web3js metamask react kovan

modified Sep 14 at 18:18 Alioune Badara DIAKHATE 6

0

votes

1

answer

25

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While importing web3.py getting following error: TypeError: 'ellipsis' object is not iterable [closed]

web3j web3.py

answered Sep 9 at 11:40 Niklas Feurstein 2,173

0

votes

2

answers

32

views

Quorum Development [closed]

quorum

modified Sep 11 at 2:33 wandos 158

0

votes

1

answer

41

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Truffle: 'func.call()' retrieves the return-value of a non-constant function

web3js truffle contract-invocation events

answered Aug 26 at 11:06 Niklas Feurstein 2,173

1

vote

2

answers

41

views

How to test a custom fallback function using web3.js?

solidity web3js testing fallback-function mocha

answered Sep 7 at 21:21 Ismael 17.4k

0

votes

1

answer

66

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How to loop an array and store values in another after if conditions

solidity arrays

answered Sep 2 at 23:32 Rob Hitchens - B9lab 33.4k

3

votes

0

answers

66

views

+50

Common Gas Pool for ERC20 Wallets?

wallets gas addresses

modified 2 days ago Vignesh Karthikeyan 1,243

0

votes

1

answer

24

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Web3 - how to add WEI and ETH values correctly

solidity go-ethereum web3js truffle blockchain

modified Sep 15 at 8:36 Niklas Feurstein 2,173

1

vote

2

answers

30

views

What is the best way to report scam/fraud token

tokens

answered Sep 2 at 22:26 abcoathup 701

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