Type Alias HrmpChannelDigests

HrmpChannelDigests: StorageDescriptor<[Key: number], [number, number], false>

Maintains a mapping that can be used to answer the question: What paras sent a message at the given block number for a given receiver. Invariants:

  • The inner Vec<ParaId> is never empty.
  • The inner Vec<ParaId> cannot store two same ParaId.
  • The outer vector is sorted ascending by block number and cannot store two items with the same block number.

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