OZ Bitmaps.md

180 - OZ Bitmaps

OpenZeppelin BitMaps: Library for managing uint256 to bool mapping in a compact and efficient way, providing the keys are sequential.

1. struct BitMap: mapping(uint256 => uint256) _data;

2. get(BitMap storage bitmap, uint256 index) → bool: Returns whether the bit at index is set.

3. setTo(BitMap storage bitmap, uint256 index, bool value): Sets the bit at index to the boolean value

4. function set(BitMap storage bitmap, uint256 index): Sets the bit at index

5. function unset(BitMap storage bitmap, uint256 index): Unsets the bit at index

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Slide Screenshot

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Slide Text

• Managing Bitmaps
  • uint256 -> bool
• get(bitmap, index) -> bool
• setTo(bitmap, index, value)
• set(bitmap, index)
• unset(bitmap, index)

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References

• Youtube Reference

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