Epoch Transition

• Epoch transition happens when someone calls beginEpochTransition() and the current block is epochLength blocks more since last transitioned block.
• In beginEpochTransition()
  • An EpochEnded event is emitted and currentEpoch increases by 1.

• After the EpochEnded event is emitted, all epoch keys attested during this epoch will have their hash chains sealed
  • by sealed it means that the hash chain is hashed again with 1, e.g., hash(1, originalHashChain)
  • if an epoch key received no attestation, it's hash chain would be hash(1, 0)

• After hash chain of the epoch keys are sealed, these epoch keys and their hash chain will be inserted into the epoch tree of this epoch
  • there's only one epoch tree for every epoch.

• There will be a new global state tree for each epoch.
• And after epoch transition, user needs to perform user state transition to transition his user state into the latest epoch

info

See also

• Epoch
• Reputation
• Trees
• User State Transition