Reduce GENESIS_SLOT to 2**32
* Address the slot/epoch underflow problem, even for Java implementers! 🎉 * Squash a bug with `get_previous_epoch` * Fix #642 * Address #626 (Vitalik, Danny, myself agree that avoiding signed integers is probably best)
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@ -212,7 +212,7 @@ Code snippets appearing in `this style` are to be interpreted as Python code.
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| Name | Value |
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| - | - |
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| `GENESIS_FORK_VERSION` | `0` |
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| `GENESIS_SLOT` | `2**63` |
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| `GENESIS_SLOT` | `2**32` |
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| `GENESIS_EPOCH` | `slot_to_epoch(GENESIS_SLOT)` |
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| `GENESIS_START_SHARD` | `0` |
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| `FAR_FUTURE_EPOCH` | `2**64 - 1` |
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@ -688,12 +688,8 @@ def slot_to_epoch(slot: Slot) -> Epoch:
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def get_previous_epoch(state: BeaconState) -> Epoch:
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"""`
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Return the previous epoch of the given ``state``.
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If the current epoch is ``GENESIS_EPOCH``, return ``GENESIS_EPOCH``.
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"""
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current_epoch = get_current_epoch(state)
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if current_epoch == GENESIS_EPOCH:
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return GENESIS_EPOCH
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return current_epoch - 1
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return get_current_epoch(state) - 1
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```
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### `get_current_epoch`
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