Hottest Questions This Month

3

votes

2

answers

952

views

What happens if you transfer ether and no miner is running?

modified Nov 29 at 16:50 shane 1,627

3

votes

4

answers

1k

views

TypeError: Data location must be “memory” for parameter in function, but none was given

solidity remix

modified Nov 28 at 16:29 Achala Dissanayake 3,562

3

votes

1

answer

429

views

Member function “transfer” not found or not visible after argument-dependent lookup in contract?

solidity truffle ganache payments

answered Nov 26 at 20:09 Lauri Peltonen 4,314

6

votes

1

answer

411

views

Can a contract with no payable function have ether?

solidity ether balances payable

answered yesterday Lauri Peltonen 4,314

5

votes

3

answers

211

views

Transfer from contract address

solidity transactions ethereum-wallet-dapp payable

answered Nov 19 at 10:17 Jaime 4,709

3

votes

4

answers

436

views

Must a Solidity developer know the private keys to the wallet that is tied to a token contract?

tokens contract-deployment private-key

answered Nov 20 at 10:42 Enrique Alcazar 316

4

votes

1

answer

664

views

What is the purpose in asserting 'msg.data.length == 64 + 4'?

solidity

modified Nov 29 at 14:56 flygoing 6,331

5

votes

2

answers

333

views

What does griefing mean?

security plasma terminology

answered Nov 22 at 9:48 Richard Horrocks 21.1k

2

votes

1

answer

764

views

TypeError: Data location must be “storage” or “memory” for parameter in function, but none was given

solidity remix solidity-best-practices solidity-design-patterns

answered Nov 29 at 22:44 Rob Hitchens B9lab 25.2k

2

votes

2

answers

449

views

Truffle in production it´s recommended [closed]

truffle

modified Dec 4 at 21:04 goodvibration 2,553

3

votes

4

answers

170

views

version compatibility issues in solidity 0.5.0 and 0.4.0

solidity

modified Nov 27 at 20:30 foba 178

3

votes

1

answer

266

views

How to check whether a uint256 is null in solidity?

solidity

answered Nov 21 at 8:09 Tudor Constantin 1,883

3

votes

1

answer

214

views

Can a Smart Contract write on the blockchain a transaction containing not only value but also data between two EOAs?

solidity eoa

answered Dec 3 at 12:26 Jaime 4,709

8

votes

2

answers

193

views

Possible error in white paper validation algorithm?

transactions blocks error white-paper

answered Nov 17 at 17:49 TLHBM 116

3

votes

1

answer

126

views

Check division is integer or float solidity

solidity erc-20

answered Nov 16 at 6:07 Shawn Tabrizi 4,501

1

vote

6

answers

172

views

How to get all contracts deployed by the address, given the address?

web3js

answered Nov 28 at 17:18 Shamit Verma 311

2

votes

1

answer

96

views

Deploying a smart contract from EVM Bytecode via rpc calls

contract-deployment private-blockchain parity

answered Nov 14 at 15:38 Micky Socaci 516

0

votes

1

answer

202

views

Data location must be “memory” for parameter in function, but none was given

solidity visual-studio-code

answered Nov 26 at 15:48 Ian Britto 85

0

votes

1

answer

180

views

truffle compile with solc 5.0.0 error: solc.compileStandard is not a function [closed]

solc truffle-compile

answered Nov 17 at 19:24 Rob Hitchens B9lab 25.2k

2

votes

1

answer

109

views

Generating random numbers in solidity based on block hash

solidity

modified Nov 23 at 11:15 Стикер Виллин 1

3

votes

1

answer

98

views

Gas costs of the following contract

go-ethereum gas evm fees

modified Dec 10 at 22:19 Briomkez 957

0

votes

2

answers

196

views

Error: Cannot find module 'truffle-hdwallet-provider'

truffle nodejs hardware-wallets

modified Nov 25 at 12:43 Rohan Dhar 259

-1

votes

1

answer

68

views

Trying to figure out this 2 ETH smart contract quiz

solidity contract-development security contract-debugging

modified Nov 22 at 20:35 Jaime 4,709

2

votes

1

answer

111

views

TypeError: web3_1.default is not a constructor

web3js typescript npm systemjs

modified Nov 24 at 12:20 A.K. 1,797

0

votes

1

answer

108

views

I got error when npm install -g solc [closed]

solc

modified Dec 6 at 8:33 A.K. 1,797

6

votes

1

answer

65

views

When did the Ethereum “free memory pointer” change? (6060… -> 6080…)

solc compilation bytecode assembly

answered Dec 4 at 23:44 Alex Byrde 401

1

vote

1

answer

80

views

Understand an EVM call instruction with gas as 0x00

gas contract-invocation evm callcode

modified Dec 4 at 17:14 Briomkez 957

3

votes

2

answers

60

views

EVM SIGNEXTEND Opcode explanation

evm opcode

answered Nov 29 at 7:31 Donut 101

1

vote

1

answer

94

views

Send more than one raw transaction quickly will throw an error

transactions sendrawtransaction

modified Dec 5 at 19:32 Ismael 14.2k

1

vote

2

answers

57

views

Truffle Tests Events via JavaScript

truffle javascript events testing truffle-assertions

modified Dec 6 at 17:06 Rosco Kalis 329

1

vote

2

answers

71

views

Efficient way of checking and inserting array address that is unqiue

solidity contract-development contract-design gas arrays

modified Nov 25 at 11:53 dievardump 136

1

vote

2

answers

33

views

Solidity: Info on How it works on the low level

solidity evm

answered Nov 26 at 1:01 Ian Britto 85

2

votes

3

answers

80

views

Why solidity 0.5.0 not working in remix?

solidity remix

answered Nov 24 at 14:03 gabby_L 1

1

vote

0

answers

131

views

Source File requires different compiler version

solidity contract-development truffle

modified Dec 5 at 4:16 angelmaria 159

1

vote

1

answer

60

views

Nested structs that are part of a mapping broken in Solidity 0.5.0?

solidity struct bug compiler

modified Dec 7 at 8:29 Juan Ignacio Pérez Sacristán 1,267

1

vote

1

answer

126

views

Remix is compiling the smart contract but not solc command

ether remix compilation

answered Nov 23 at 6:10 A.K. 1,797

1

vote

2

answers

57

views

What happens in this scenario?

solidity

answered Nov 18 at 6:02 Rob Hitchens B9lab 25.2k

1

vote

3

answers

44

views

How can import one contract functions in solidity

contract-development import

answered Nov 22 at 12:37 Vishnu PS 101

0

votes

2

answers

92

views

Bootnode failure!

bootnodes

modified Nov 30 at 5:14 shane 1,627

2

votes

1

answer

69

views

I accidentally sent ERC20 tokens to my Ledger Live wallet, which does not support them. How do I get the tokens out?

erc-20 wallets myetherwallet ledger-nano-s

answered Nov 19 at 22:31 Jeremy T 161

1

vote

1

answer

51

views

Are constant state variables cached in the EVM?

evm storage state-variable constant

modified Nov 20 at 10:27 Briomkez 957

1

vote

3

answers

65

views

Solidity version error

visual-studio-code

answered Nov 29 at 16:34 CodingYourLife 175

0

votes

0

answers

103

views

solc.compile() @0.5.0 is not working like 0.4 version

solidity solc

asked Nov 29 at 9:16 Shubham Chadokar 67

1

vote

2

answers

37

views

What are the use cases of tokens? How they are different than ethers?

ether tokens erc-20

answered Nov 19 at 6:44 Shawn Tabrizi 4,501

1

vote

2

answers

77

views

Chainlink vs Oraclize [closed]

oracles chainlink

answered Nov 23 at 7:28 Timo Harings 1

0

votes

1

answer

74

views

Anonymity preserving approaches in smart contracts?

contract-design anonymity

modified Nov 20 at 14:10 Lauri Peltonen 4,314

1

vote

1

answer

44

views

creating a private boot node based on geth

go-ethereum bootnodes

answered Dec 6 at 8:21 Kaki Master Of Time 1,100

1

vote

1

answer

55

views

Some questions about ethereum swarm

go-ethereum swarm

answered Nov 16 at 11:13 lash 410

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