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add note about total balance overflowing

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Danny Ryan 2020-03-10 13:12:17 -06:00
parent 882b9ee035
commit 1579072e15
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specs/phase0/beacon-chain.md
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@ -954,6 +954,7 @@ def get_beacon_proposer_index(state: BeaconState) -> ValidatorIndex:
def get_total_balance(state: BeaconState, indices: Set[ValidatorIndex]) -> Gwei:
"""
Return the combined effective balance of the ``indices``. (1 Gwei minimum to avoid divisions by zero.)
Math safe up to ~10B ETH, afterwhich this overflows uint64.
"""
return Gwei(max(1, sum([state.validators[index].effective_balance for index in indices])))
```