Hottest Questions This Month

3

votes

4

answers

810

views

Why are contracts in Ethereum Blockchain called as 'Smart Contracts'?

blockchain

modified Sep 26 at 13:41 Rob Hitchens B9lab 23.3k

6

votes

3

answers

146

views

Composition Over Inheritance - Gas Efficiency

answered Oct 11 at 21:56 Steve Ellis 860

2

votes

3

answers

369

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Accessing not public variables

solidity web3js access visibility

answered Sep 25 at 10:25 Jaime 4,054

0

votes

1

answer

229

views

Expected ; but got 'event'

solidity

modified Sep 30 at 18:30 Ismael 13.3k

2

votes

2

answers

200

views

Ethereum Smart Contract execution principle

contract-invocation

modified Oct 7 at 20:14 ivicaa 3,969

2

votes

2

answers

246

views

Is web3 completely decentralized?

web3js dapps

modified Oct 15 at 2:59 Peter Mortensen 111

3

votes

3

answers

106

views

Maximum known Ethereum fork length

blockchain forks

modified Oct 8 at 22:12 shane 962

1

vote

3

answers

63

views

How to map an address with a string array in solidity?

solidity arrays mapping solidity-best-practices solidity-design-patterns

modified Oct 9 at 18:15 Ismael 13.3k

13

votes

0

answers

123

views

zk-SNARKs vs. Zk-STARKs vs. BulletProofs?

privacy zksnark zero-knowledge

modified Sep 25 at 13:36 sas 652

1

vote

3

answers

92

views

Is there anything that is equivalent of Hyperledger Fabric's Membership Service Provider in Ethereum?

identity authentication

modified Sep 26 at 20:55 morpheus 106

0

votes

1

answer

50

views

Track my contract as its owner

contract-design

modified Sep 28 at 13:09 R.D 192

0

votes

2

answers

172

views

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

solidity web3js remix rinkeby

answered Oct 10 at 17:19 RafiAlhamd 55

1

vote

2

answers

81

views

Benefit of using Infura for deploying smart contract

infura

answered Oct 4 at 11:03 AVATAR 92

0

votes

1

answer

98

views

Web3 js 1.0 is throwing big number error while transfering tokens

web3js erc-20 ethereumjs

modified Sep 24 at 18:35 Ismael 13.3k

1

vote

1

answer

119

views

Truffle contract deployment either exceeds block gas limit or out of gas

truffle remix gas-limit out-of-gas

modified Sep 26 at 11:31 Billie 78

6

votes

1

answer

43

views

How does the DAI keep its peg to a USD dollar?

stablecoins dai

answered Sep 24 at 8:08 Adam Dossa 715

0

votes

1

answer

105

views

web3.js token approve function show null / 0 in Metamask

web3js metamask dapp-development dapps jquery

answered Oct 12 at 4:53 user2774555 66

6

votes

0

answers

104

views

What happened in the Ropsten hardfork from Byzantium to Constantinople?

consensus hardforks byzantium constantinople

asked Oct 14 at 5:09 eth♦ 52k

0

votes

2

answers

62

views

How would you render this structure of data?

solidity contract-development struct database

answered 2 days ago flygoing 5,328

1

vote

3

answers

60

views

Unknown account error while deploying dapp on Ropsten testnet

truffle ropsten

answered Sep 27 at 12:10 Deb 16

4

votes

1

answer

28

views

How to map from two keys to one value?

solidity contract-development remix

answered Oct 4 at 23:53 lunr 535

1

vote

1

answer

91

views

Two ERC721 tokens that refer to the same metadata

tokens erc-721 non-fungible-tokens

modified Oct 1 at 17:13 Sean Thoman 106

1

vote

2

answers

42

views

How to maintain history of changes in mapping?

solidity contract-development mapping logs history

answered Sep 24 at 20:03 Amit Modi 87

1

vote

3

answers

53

views

Reading from the Ethereum Blockchain [closed]

blockchain

modified Sep 26 at 10:01 PaulRBerg 824

3

votes

2

answers

52

views

Why does geth Sync get very slow around 4 million blocks

go-ethereum fast-sync

answered Sep 23 at 22:02 dave kajpust 126

1

vote

2

answers

52

views

Can a Contract ABI change?

web3js contract-design etherscan abi

answered Oct 8 at 22:44 Khaja Mohammed 101

4

votes

1

answer

48

views

As of 2018 Sept 21st. When is the scheduled Casper Proof of Stake expected to arrive?

proof-of-stake casper

modified Sep 21 at 17:25 shane 962

4

votes

1

answer

77

views

How etherscan.io is able to track ERC721 tokens on the blockchain

transactions erc-721

answered Oct 2 at 18:07 Shawn Tabrizi 3,394

6

votes

1

answer

28

views

Why is the returndata of a function returning bytes formatted in a weird way?

solidity abi bytes

modified Oct 14 at 19:46 eth♦ 52k

1

vote

3

answers

59

views

What are the main differences between blockchains & distributed ledger technology from a technical perspective?

blockchain

answered Oct 7 at 10:56 ivicaa 3,969

2

votes

2

answers

59

views

Truffle Migrations | Same contract deployed multiple times

solidity truffle truffle-migration

answered Oct 8 at 3:44 Ismael 13.3k

0

votes

2

answers

35

views

Different Values for v, r, s? What am I doing wrong?

transactions metamask python signature pyethereum

modified Oct 16 at 12:39 Jaime 4,054

2

votes

1

answer

73

views

2 miners on private network slow sync

go-ethereum mining private-blockchain

answered Oct 8 at 19:23 jdevoo 21

2

votes

2

answers

56

views

Is it possible to use a modifier from a different contract?

solidity contract-development modifiers

answered Oct 13 at 4:47 Rob Hitchens B9lab 23.3k

1

vote

0

answers

91

views

Recovered Sender Address from Raw Transaction

php rlp

modified Sep 21 at 23:45 vincentLg 146

0

votes

1

answer

42

views

How to withdraw ETH from Contract to Owner wallet?

solidity myetherwallet

answered Sep 29 at 1:21 Motoma 166

0

votes

1

answer

69

views

MetaMask shows “UNKNOWN FUNCTION” when calling method send function

web3js metamask rinkeby

answered Sep 29 at 11:50 Adam Dossa 715

1

vote

1

answer

69

views

Wallets report 0 balance for address but balanceOf is right

solidity wallets erc-20 open-zeppelin

answered Oct 5 at 16:02 arisalexis 55

3

votes

1

answer

53

views

Does Ethereum support pairing operations?

signature cryptography ecrecover pairings

modified Sep 24 at 5:14 eth♦ 52k

1

vote

0

answers

86

views

Problem reading events, with web3 v1.0 beta 36 and infura

solidity web3js infura

modified Sep 26 at 23:25 Rob Hitchens B9lab 23.3k

1

vote

2

answers

31

views

how to reach consensus berween only 2 peers?

blockchain consensus hyperledger

answered Sep 26 at 18:48 Luiz Soares 771

2

votes

2

answers

51

views

Self executing smart contract? [closed]

solidity go-ethereum remix

modified Oct 2 at 21:28 Jaime 4,054

0

votes

1

answer

84

views

How to write a component in Drizzle React? [closed]

dapp-development react drizzle

modified Oct 1 at 4:10 Andy 3

0

votes

2

answers

39

views

Gas for view functions

solidity gas gas-limit view

answered Sep 25 at 9:17 Jaime 4,054

1

vote

1

answer

39

views

web3js - Promises - web3.eth.getAccounts()

web3js dapp-development ganache

modified Oct 4 at 5:11 ivicaa 3,969

1

vote

2

answers

64

views

solidity ecrecovery and ethereumjs ecsign return different address

web3js contract-development ethereumjs

modified Oct 5 at 4:18 stackdisplay 122

0

votes

0

answers

81

views

Error: Transaction has been reverted by the EVM:

solidity web3js

modified Sep 25 at 16:54 Utgarda 461

1

vote

1

answer

49

views

Buy token function does not work in crowd-sale smart contract

solidity contract-development contract-debugging ico crowdsale

modified Oct 12 at 7:26 AVATAR 92

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