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Added underflow checking to decrease_balance

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vbuterin
2019-03-07 04:02:53 -06:00
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parent 0759e170a7
commit be4b912373
1 changed files with 2 additions and 1 deletions
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specs/core/0_beacon-chain.md
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@@ -791,7 +791,8 @@ def increase_balance(state: BeaconState, index: int, delta: int) -> None:
````python
def decrease_balance(state: BeaconState, index: int, delta: int) -> None:
set_balance(state, index, get_balance(state, index) - delta)
cur_balance = get_balance(state, index)
set_balance(state, index, cur_balance - delta if cur_balance >= delta else 0)
````
### `get_permuted_index`