New answers tagged bytes
0
I am just trying to understand why the bytes32 and 5, need strings of length 66 and 11 respectively if each character is a byte
I'll explain for bytes32:
In order to send bytes32 from web3.js to a smart-contract function, you need to provide a string which starts with "0x" followed by 64 hexadecimal characters.
Why 64? Because each character ...
2
The Istanbul hardfork included EIP-1884, which (among other repricings) repriced SLOAD from 200 to 800 gas. That means loading 5 addresses from storage will cost 4000 gas, not including any overhead. The Istanbul hardfork also included EIP-2028, which lowered the cost of non-zero calldata bytes from 68 to 16. These two EIPS are what cause the huge difference ...
1
In any standard ERC20-Token, for example, because that's what the ERC20 standard dictates:
function name() public view returns (string);
function symbol() public view returns (string);
If you use bytes32 instead (as implemented in some of the early ERC20 tokens deployed on mainnet), then you'll be violating the standard, and any application trying to ...
1
It seems there now is, since solidity version 0.4.24 you can use abi.encodePacked
E.G:
uint i = 0;
i_bytes = abi.encodePacked(i);
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