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Library cells allows to extend deduplication mechanism on-chain. This significantly reduces the size of serialized data and enables efficient storage of incrementally updated data. For the details see library cells page. Always has level zero, so does not contain any higher hashes. Each library cell is serialized as follows:
  • The 1-byte tag that always equals to 0x02.
  • The 256-bit representation hash of the library cell being referred to.