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Transfer from -> sender 

Needed to avoid triggering errors in python
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vbuterin 2019-03-03 05:59:11 -06:00 committed by GitHub
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16
specs/core/0_beacon-chain.md
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@ -442,7 +442,7 @@ The following data structures are defined as [SimpleSerialize (SSZ)](https://git
```python
{
# Sender index
'from': 'uint64',
'sender': 'uint64',
# Recipient index
'to': 'uint64',
# Amount in Gwei
@ -1913,23 +1913,23 @@ def process_transfer(state: BeaconState, transfer: Transfer) -> None:
Note that this function mutates ``state``.
"""
# Verify the amount and fee aren't individually too big (for anti-overflow purposes)
assert state.validator_balances[transfer.from] >= max(transfer.amount, transfer.fee)
assert state.validator_balances[transfer.sender] >= max(transfer.amount, transfer.fee)
# Verify that we have enough ETH to send, and that after the transfer the balance will be either
# exactly zero or at least MIN_DEPOSIT_AMOUNT
assert (
state.validator_balances[transfer.from] == transfer.amount + transfer.fee or
state.validator_balances[transfer.from] >= transfer.amount + transfer.fee + MIN_DEPOSIT_AMOUNT
state.validator_balances[transfer.sender] == transfer.amount + transfer.fee or
state.validator_balances[transfer.sender] >= transfer.amount + transfer.fee + MIN_DEPOSIT_AMOUNT
)
# A transfer is valid in only one slot
assert state.slot == transfer.slot
# Only withdrawn or not-yet-deposited accounts can transfer
assert (
get_current_epoch(state) >= state.validator_registry[transfer.from].withdrawable_epoch or
state.validator_registry[transfer.from].activation_epoch == FAR_FUTURE_EPOCH
get_current_epoch(state) >= state.validator_registry[transfer.sender].withdrawable_epoch or
state.validator_registry[transfer.sender].activation_epoch == FAR_FUTURE_EPOCH
)
# Verify that the pubkey is valid
assert (
state.validator_registry[transfer.from].withdrawal_credentials ==
state.validator_registry[transfer.sender].withdrawal_credentials ==
BLS_WITHDRAWAL_PREFIX_BYTE + hash(transfer.pubkey)[1:]
)
# Verify that the signature is valid
@ -1940,7 +1940,7 @@ def process_transfer(state: BeaconState, transfer: Transfer) -> None:
domain=get_domain(state.fork, slot_to_epoch(transfer.slot), DOMAIN_TRANSFER)
)
# Process the transfer
state.validator_balances[transfer.from] -= transfer.amount + transfer.fee
state.validator_balances[transfer.sender] -= transfer.amount + transfer.fee
state.validator_balances[transfer.to] += transfer.amount
state.validator_balances[get_beacon_proposer_index(state, state.slot)] += transfer.fee
```