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Added efficiency improvement (two fewer expected SSTOREs per deposit)

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vbuterin 2019-01-23 06:11:55 -06:00 committed by GitHub
parent 722e201109
commit c8b2755177
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1 changed files with 3 additions and 4 deletions
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specs/core/0_beacon-chain.md
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@ -653,7 +653,7 @@ DEPOSIT_CONTRACT_TREE_DEPTH: constant(uint256) = 32
TWO_TO_POWER_OF_TREE_DEPTH: constant(uint256) = 4294967296 # 2**32 TWO_TO_POWER_OF_TREE_DEPTH: constant(uint256) = 4294967296 # 2**32
SECONDS_PER_DAY: constant(uint256) = 86400 SECONDS_PER_DAY: constant(uint256) = 86400
Deposit: event({previous_deposit_root: bytes32, data: bytes[2064], merkle_tree_index: bytes[8]}) Deposit: event({previous_deposit_root: bytes32, data: bytes[2064], merkle_tree_index: bytes[8], branch: bytes32[32]})
ChainStart: event({deposit_root: bytes32, time: bytes[8]}) ChainStart: event({deposit_root: bytes32, time: bytes[8]})
zerohashes: bytes32[32] zerohashes: bytes32[32]
@ -676,7 +676,7 @@ def get_deposit_root() -> bytes32:
if size % 2 == 1: if size % 2 == 1:
root = sha3(concat(self.branch[h], root)) root = sha3(concat(self.branch[h], root))
else: else:
root = sha3(concat(root, self.branch[h])) root = sha3(concat(root, self.zerohashes[h]))
size /= 2 size /= 2
return root return root
@ -704,12 +704,11 @@ def deposit(deposit_input: bytes[2048]):
for j in range(32): for j in range(32):
if j < i: if j < i:
value = sha3(concat(self.branch[j], value)) value = sha3(concat(self.branch[j], value))
self.branch[j] = self.zerohashes[j]
self.branch[i] = value self.branch[i] = value
self.deposit_count += 1 self.deposit_count += 1
log.Deposit(self.get_deposit_root(), deposit_data, merkle_tree_index) log.Deposit(self.get_deposit_root(), deposit_data, merkle_tree_index, self.branch)
if msg.value == as_wei_value(MAX_DEPOSIT_AMOUNT, "gwei"): if msg.value == as_wei_value(MAX_DEPOSIT_AMOUNT, "gwei"):
self.full_deposit_count += 1 self.full_deposit_count += 1