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OZ Counters.md

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162 - OZ Counters

OpenZeppelin Counters: Provides counters that can only be incremented or decremented by one.

This can be used e.g. to track the number of elements in a mapping, issuing ERC721 ids, or counting request ids. Functions are:

  1. current(struct Counters.Counter counter) → uint256

  2. increment(struct Counters.Counter counter)

  3. decrement(struct Counters.Counter counter)

Slide Screenshot

162.jpg

Slide Text

  • Counters
    • Increment & Decrement
  • Mapping Elements, ERC721 IDs, Request IDs
  • current() -> Value
  • reset() -> 0
  • increment()
  • decrement()

References

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