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Update 1_shard-data-chains.md

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Justin 2019-09-03 19:17:19 +01:00 committed by GitHub
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specs/core/1_shard-data-chains.md
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@ -62,11 +62,11 @@ This document describes the shard transition function (data layer only) and the
| Name | Value |
| - | - |
| `MIN_BLOCK_SIZE_PRICE` | `2**0` (= 1) |
| `MIN_BLOCK_BODY_PRICE` | `2**0` (= 1) |
| `MAX_PERIOD_COMMITTEE_SIZE` | `2**7` (= 128) |
| `SHARD_HEADER_SIZE` | `2**9` (= 512) |
| `SHARD_BLOCK_SIZE_TARGET` | `2**14` (= 16,384) |
| `SHARD_BLOCK_SIZE_LIMIT` | `2**16` (= 65,536) |
| `MAX_SHARD_BLOCK_SIZE` | `2**16` (= 65,536) |
### Initial values
@ -91,7 +91,7 @@ This document describes the shard transition function (data layer only) and the
| Name | Value |
| - | - |
| `SHARD_BLOCK_SIZE_PRICE_QUOTIENT` | `2**3` (= 8) |
| `BLOCK_BODY_PRICE_QUOTIENT` | `2**3` (= 8) |
### Signature domain types
@ -112,7 +112,7 @@ class ShardBlock(FlatContainer):
parent_root: Hash
state_root: Hash
block_size_sum: uint64
body: List[byte, SHARD_BLOCK_SIZE_LIMIT - SHARD_HEADER_SIZE]
body: List[byte, MAX_SHARD_BLOCK_SIZE - SHARD_HEADER_SIZE]
attestation_bits: Bitvector[2 * MAX_PERIOD_COMMITTEE_SIZE]
attestation_signature: BLSSignature
signature: BLSSignature
@ -128,7 +128,7 @@ class ShardBlockHeader(FlatContainer):
parent_root: Hash
state_root: Hash
block_size_sum: uint64
body_root: List[byte, SHARD_BLOCK_SIZE_LIMIT - SHARD_HEADER_SIZE]
body_root: List[byte, MAX_SHARD_BLOCK_SIZE - SHARD_HEADER_SIZE]
attestation_bits: Bitvector[2 * MAX_PERIOD_COMMITTEE_SIZE]
attestation_signature: BLSSignature
signature: BLSSignature
@ -233,7 +233,7 @@ def get_genesis_shard_state(state: BeaconState, shard: Shard) -> ShardState:
return ShardState(
shard=shard,
slot=ShardSlot(SHARD_GENESIS_EPOCH * SHARD_SLOTS_PER_EPOCH),
block_body_price=MIN_BLOCK_SIZE_PRICE,
block_body_price=MIN_BLOCK_BODY_PRICE,
)
```
@ -375,19 +375,19 @@ def process_shard_attestations(state: BeaconState, shard_state: ShardState, bloc
def process_shard_block_body_fee(state: BeaconState, shard_state: ShardState, block: ShardBlock) -> None:
# Apply proposer block body fee
proposer_index = get_shard_proposer_index(state, state.shard, block.slot)
block_body_fee = state.block_body_price * len(block.body) // SHARD_BLOCK_SIZE_LIMIT
block_body_fee = state.block_body_price * len(block.body) // MAX_SHARD_BLOCK_SIZE
process_delta(state, shard_state, proposer_index, -block_body_fee) # Burn
process_delta(state, shard_state, proposer_index, block_body_fee // PROPOSER_REWARD_QUOTIENT) # Reward
# Calculate new block body price
block_size = SHARD_HEADER_SIZE + len(block.body)
QUOTIENT = SHARD_BLOCK_SIZE_LIMIT * SHARD_BLOCK_SIZE_PRICE_QUOTIENT
QUOTIENT = MAX_SHARD_BLOCK_SIZE * BLOCK_BODY_PRICE_QUOTIENT
price_delta = GweiDelta(state.block_body_price * (block_size - SHARD_BLOCK_SIZE_TARGET) // QUOTIENT)
if price_delta > 0:
# The maximum gas price caps the amount burnt on gas fees within a period
MAX_BLOCK_SIZE_PRICE = MAX_EFFECTIVE_BALANCE // EPOCHS_PER_SHARD_PERIOD // SHARD_SLOTS_PER_EPOCH
state.block_body_price = Gwei(min(MAX_BLOCK_SIZE_PRICE, state.block_body_price + price_delta))
# The maximum block body price caps the amount burnt on fees within a period
MAX_BLOCK_BODY_PRICE = MAX_EFFECTIVE_BALANCE // EPOCHS_PER_SHARD_PERIOD // SHARD_SLOTS_PER_EPOCH
state.block_body_price = Gwei(min(MAX_BLOCK_BODY_PRICE, state.block_body_price + price_delta))
else:
state.block_body_price = Gwei(max(MIN_BLOCK_SIZE_PRICE, state.block_body_price + price_delta))
state.block_body_price = Gwei(max(MIN_BLOCK_BODY_PRICE, state.block_body_price + price_delta))
```
## Shard fork choice rule