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Add checkpoint sync

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Paul Hauner 2021-12-14 16:10:19 +11:00
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sync/optimistic.md
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@ -72,6 +72,11 @@ from `SYNCING` to `INVALID`. Specifically, a block deemed `INVALID` at any
point MUST NOT be included in the canonical chain and the weights from those
`INVALID` blocks MUST NOT be applied to any `VALID` or `SYNCING` ancestors.
## Checkpoint Sync (Weak Subjectivity Sync)
A consensus engine MAY assume that the `ExecutionPayload` of a block used for
checkpoint sync is `VALID`.
### Helpers
Let `head_block: BeaconBlock` be the result of calling of the fork choice