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I want to set up 64 boolean flags in a contract. What's the better option here?

a) bool[64]

b) uint64

And is there way to name each flag in Solidity like:

#define BIT_0 0
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uint64 should be used for numbers that can be added and multiplied. If you want to perform bit operations, types like bytes8 should be better suited. A bool array is quite wasteful, as it takes a single byte per element. You can name the flags using constants: bytes8 constant bit_1 = 2**1;.

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  • Could I also name the flags using uint8 ? @chriseth – alper Mar 28 '19 at 13:28

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