81 lines
2.1 KiB
Nim
81 lines
2.1 KiB
Nim
|
import
|
||
|
|
web3/engine_api_types,
|
||
|
|
../db/db_chain,
|
||
|
|
./merger
|
||
|
|
|
||
|
|
import eth/common/eth_types except BlockHeader
|
||
|
|
|
||
|
|
export merger
|
||
|
|
|
||
|
|
type
|
||
|
|
EthBlockHeader* = eth_types.BlockHeader
|
||
|
|
|
||
|
|
const
|
||
|
|
# maxTrackedPayloads is the maximum number of prepared payloads the execution
|
||
|
|
# engine tracks before evicting old ones. Ideally we should only ever track the
|
||
|
|
# latest one; but have a slight wiggle room for non-ideal conditions.
|
||
|
|
MaxTrackedPayloads = 10
|
||
|
|
|
||
|
|
# maxTrackedHeaders is the maximum number of executed payloads the execution
|
||
|
|
# engine tracks before evicting old ones. Ideally we should only ever track the
|
||
|
|
# latest one; but have a slight wiggle room for non-ideal conditions.
|
||
|
|
MaxTrackedHeaders = 10
|
||
|
|
|
||
|
|
type
|
||
|
|
QueueItem[T] = object
|
||
|
|
used: bool
|
||
|
|
data: T
|
||
|
|
|
||
|
|
SimpleQueue[M: static[int]; T] = object
|
||
|
|
list: array[M, QueueItem[T]]
|
||
|
|
|
||
|
|
PayloadItem = object
|
||
|
|
id: PayloadId
|
||
|
|
payload: ExecutionPayloadV1
|
||
|
|
|
||
|
|
HeaderItem = object
|
||
|
|
hash: Hash256
|
||
|
|
header: EthBlockHeader
|
||
|
|
|
||
|
|
EngineAPI* = ref object
|
||
|
|
merger*: Merger
|
||
|
|
payloadQueue: SimpleQueue[MaxTrackedPayloads, PayloadItem]
|
||
|
|
headerQueue: SimpleQueue[MaxTrackedHeaders, HeaderItem]
|
||
|
|
|
||
|
|
template shiftRight[M, T](x: var SimpleQueue[M, T]) =
|
||
|
|
x.list[1..^1] = x.list[0..^2]
|
||
|
|
|
||
|
|
proc put[M, T](x: var SimpleQueue[M, T], val: T) =
|
||
|
|
x.shiftRight()
|
||
|
|
x.list[0] = QueueItem[T](used: true, data: val)
|
||
|
|
|
||
|
|
iterator items[M, T](x: SimpleQueue[M, T]): T =
|
||
|
|
for z in x.list:
|
||
|
|
if z.used:
|
||
|
|
yield z.data
|
||
|
|
|
||
|
|
proc new*(_: type EngineAPI, db: BaseChainDB): EngineAPI =
|
||
|
|
new result
|
||
|
|
if not db.isNil:
|
||
|
|
result.merger.init(db)
|
||
|
|
|
||
|
|
proc put*(api: EngineAPI, hash: Hash256, header: EthBlockHeader) =
|
||
|
|
api.headerQueue.put(HeaderItem(hash: hash, header: header))
|
||
|
|
|
||
|
|
proc get*(api: EngineAPI, hash: Hash256, header: var EthBlockHeader): bool =
|
||
|
|
for x in api.headerQueue:
|
||
|
|
if x.hash == hash:
|
||
|
|
header = x.header
|
||
|
|
return true
|
||
|
|
false
|
||
|
|
|
||
|
|
proc put*(api: EngineAPI, id: PayloadId, payload: ExecutionPayloadV1) =
|
||
|
|
api.payloadQueue.put(PayloadItem(id: id, payload: payload))
|
||
|
|
|
||
|
|
proc get*(api: EngineAPI, id: PayloadId, payload: var ExecutionPayloadV1): bool =
|
||
|
|
for x in api.payloadQueue:
|
||
|
|
if x.id == id:
|
||
|
|
payload = x.payload
|
||
|
|
return true
|
||
|
|
false
|