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Add section for enabling opt sync

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Paul Hauner 2021-12-19 14:56:46 +11:00
parent 2aa4edf933
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sync/optimistic.md
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@ -37,6 +37,11 @@ def is_execution_block(block: BeaconBlock) -> BeaconBlock:
block.execution_payload != ExecutionPayload() block.execution_payload != ExecutionPayload()
``` ```
```python
def should_optimistically_import_block(current_slot: Slot, block: BeaconBlock) -> bool:
block.slot + SAFE_SLOTS_TO_IMPORT_OPTIMISTICALLY <= current_slot
```
Let only a node which returns `is_optimistic(head) == True` be an *optimistic Let only a node which returns `is_optimistic(head) == True` be an *optimistic
node*. Let only a validator on an optimistic node be an *optimistic validator*. node*. Let only a validator on an optimistic node be an *optimistic validator*.
@ -48,7 +53,13 @@ behaviours without regard for optimistic sync.
## When to optimistically import blocks ## When to optimistically import blocks
TODO A block MUST NOT be optimistically imported, unless either of the following
conditions are met:
1. The justified checkpoint has execution enabled. I.e.,
`is_execution_block(get_block(get_state(head_block).finalized_checkpoint.root))`
1. The current slot (as per the system clock) is at least `SAFE_SLOTS_TO_IMPORT_OPTIMISTICALLY` ahead of
the slot of the block being imported. I.e., `should_optimistically_import_block(current_slot) == True`.
## How to optimistically import blocks ## How to optimistically import blocks