python (65.2k questions)

javascript (44.3k questions)

reactjs (22.7k questions)

java (20.8k questions)

c# (17.4k questions)

html (16.3k questions)

r (13.7k questions)

android (13k questions)

Questions - solidity

How to get a list of staked assets by address

I'm going crazy trying to figure this out. I have the following public mapping: mapping(uint256 => address) public staked; When I stake an assets, I assign it like so: function stake(uint256[] mem...
test-img

bryan

solidity

Votes: 0

Answers: 1

Latest Answer

but how would I get an array back of every asset id staked by 1 address You'll need to duplicate the data in a second mapping. The value can be an array containing all token IDs staked by an address...
test-img

Petr Hejda

Revert throws "missing revert data" in inherited method

I've got a base contract which I use to add functionality to other contracts by inheritance. For some reason, neither revert nor require are working as expected when the method is called by a descende...
test-img

GGizmos

ethereum

solidity

Votes: 0

Answers: 1

Latest Answer

require takes a boolean, like so: require(condition, error message); So your check should look like this: require(attrExists, "no such attrib"); But your problem is probably with the coll....
test-img

Pandapip1

Call solidity function dynamically, based on its bytes4 function selector

In a smart contract, let's say I have a function which wants to invoke another function dynamically, based on some internal logic. Here it obtains the function selector as a bytes4 variable. After whi...
test-img

bguiz

blockchain

ethereum

solidity

smartcontracts

rsk

Votes: 0

Answers: 3

Latest Answer

Regarding option B: Using call will return a bytes object, which then should you convert to appropiate type, in this case to an integer. (extra gas usage) To use call, you need to pack the selector a...
test-img

keser

Why can bytes1 store 0xb5 but can't store 2 in solidity?

I'am trying to learn about bytes in solidity but it is really confusing. I played around with bytes in remix but one thing in particular is very confusing. When I tried to assign number 2 to bytes1 li...
test-img

Kuly14

ethereum

solidity

Votes: 0

Answers: 2

Latest Answer

You can't make implicit type conversion between int literal and bytes. The official solidity documentation says: Decimal number literals cannot be implicitly converted to fixed-size byte arrays. Hexa...
test-img

kj-crypto

Posts

Questions

Blogs

Jobs