615 lines
21 KiB
Nim
615 lines
21 KiB
Nim
import
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std/[tables],
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chronicles,
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nimcrypto/sysrand,
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stew/[byteutils],
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eth/common, chronos,
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json_rpc/rpcclient,
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../../../nimbus/beacon/execution_types,
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../../../nimbus/beacon/web3_eth_conv,
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../../../nimbus/beacon/payload_conv,
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../../../nimbus/[constants],
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../../../nimbus/common as nimbus_common,
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./client_pool,
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./engine_env,
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./engine_client,
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./types
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import web3/engine_api_types except Hash256 # conflict with the one from eth/common
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# Consensus Layer Client Mock used to sync the Execution Clients once the TTD has been reached
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type
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CLMocker* = ref object
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com: CommonRef
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# Number of required slots before a block which was set as Head moves to `safe` and `finalized` respectively
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slotsToSafe* : int
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slotsToFinalized*: int
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safeSlotsToImportOptimistically*: int
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# Wait time before attempting to get the payload
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payloadProductionClientDelay*: int
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# Block production related
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blockTimestampIncrement*: Option[int]
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# Block Production State
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clients : ClientPool
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nextBlockProducer* : EngineEnv
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nextFeeRecipient* : EthAddress
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nextPayloadID* : PayloadID
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currentPayloadNumber* : uint64
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# Chain History
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headerHistory : Table[uint64, common.BlockHeader]
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# PoS Chain History Information
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prevRandaoHistory* : Table[uint64, common.Hash256]
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executedPayloadHistory* : Table[uint64, ExecutionPayload]
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headHashHistory : seq[BlockHash]
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# Latest broadcasted data using the PoS Engine API
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latestHeadNumber* : uint64
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latestHeader* : common.BlockHeader
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latestPayloadBuilt* : ExecutionPayload
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latestBlockValue* : Option[UInt256]
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latestBlobsBundle* : Option[BlobsBundleV1]
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latestShouldOverrideBuilder*: Option[bool]
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latestPayloadAttributes*: PayloadAttributes
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latestExecutedPayload* : ExecutionPayload
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latestForkchoice* : ForkchoiceStateV1
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# Merge related
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firstPoSBlockNumber : Option[uint64]
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ttdReached* : bool
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transitionPayloadTimestamp: Option[int]
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chainTotalDifficulty : UInt256
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# Shanghai related
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nextWithdrawals* : Option[seq[WithdrawalV1]]
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BlockProcessCallbacks* = object
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onPayloadProducerSelected* : proc(): bool {.gcsafe.}
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onPayloadAttributesGenerated* : proc(): bool {.gcsafe.}
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onRequestNextPayload* : proc(): bool {.gcsafe.}
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onGetPayload* : proc(): bool {.gcsafe.}
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onNewPayloadBroadcast* : proc(): bool {.gcsafe.}
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onForkchoiceBroadcast* : proc(): bool {.gcsafe.}
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onSafeBlockChange * : proc(): bool {.gcsafe.}
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onFinalizedBlockChange* : proc(): bool {.gcsafe.}
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func latestPayloadNumber*(h: Table[uint64, ExecutionPayload]): uint64 =
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result = 0'u64
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for n, _ in h:
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if n > result:
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result = n
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func latestWithdrawalsIndex*(h: Table[uint64, ExecutionPayload]): uint64 =
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result = 0'u64
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for n, p in h:
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if p.withdrawals.isNone:
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continue
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let wds = p.withdrawals.get
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for w in wds:
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if w.index.uint64 > result:
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result = w.index.uint64
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func client(cl: CLMocker): RpcClient =
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cl.clients.first.client
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proc init(cl: CLMocker, eng: EngineEnv, com: CommonRef) =
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cl.clients = ClientPool()
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cl.clients.add eng
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cl.com = com
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cl.slotsToSafe = 1
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cl.slotsToFinalized = 2
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cl.payloadProductionClientDelay = 0
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cl.headerHistory[0] = com.genesisHeader()
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proc newClMocker*(eng: EngineEnv, com: CommonRef): CLMocker =
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new result
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result.init(eng, com)
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proc addEngine*(cl: CLMocker, eng: EngineEnv) =
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cl.clients.add eng
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proc waitForTTD*(cl: CLMocker): Future[bool] {.async.} =
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let ttd = cl.com.ttd()
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doAssert(ttd.isSome)
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let (header, waitRes) = await cl.client.waitForTTD(ttd.get)
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if not waitRes:
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error "CLMocker: timeout while waiting for TTD"
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return false
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cl.latestHeader = header
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cl.headerHistory[header.blockNumber.truncate(uint64)] = header
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cl.ttdReached = true
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let headerHash = BlockHash(common.blockHash(cl.latestHeader).data)
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if cl.slotsToSafe == 0:
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cl.latestForkchoice.safeBlockHash = headerHash
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if cl.slotsToFinalized == 0:
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cl.latestForkchoice.finalizedBlockHash = headerHash
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# Reset transition values
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cl.latestHeadNumber = cl.latestHeader.blockNumber.truncate(uint64)
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cl.headHashHistory = @[]
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cl.firstPoSBlockNumber = none(uint64)
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# Prepare initial forkchoice, to be sent to the transition payload producer
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cl.latestForkchoice = ForkchoiceStateV1()
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cl.latestForkchoice.headBlockHash = headerHash
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let res = cl.client.forkchoiceUpdatedV1(cl.latestForkchoice)
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if res.isErr:
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error "waitForTTD: forkchoiceUpdated error", msg=res.error
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return false
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let s = res.get()
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if s.payloadStatus.status != PayloadExecutionStatus.valid:
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error "waitForTTD: forkchoiceUpdated response unexpected",
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expect = PayloadExecutionStatus.valid,
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get = s.payloadStatus.status
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return false
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return true
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# Check whether a block number is a PoS block
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proc isBlockPoS*(cl: CLMocker, bn: common.BlockNumber): bool =
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if cl.firstPoSBlockNumber.isNone:
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return false
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let number = cl.firstPoSBlockNumber.get()
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let bn = bn.truncate(uint64)
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if number > bn:
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return false
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return true
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# Return the per-block timestamp value increment
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func getTimestampIncrement(cl: CLMocker): EthTime =
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EthTime cl.blockTimestampIncrement.get(1)
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# Returns the timestamp value to be included in the next payload attributes
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func getNextBlockTimestamp(cl: CLMocker): EthTime =
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if cl.firstPoSBlockNumber.isNone and cl.transitionPayloadTimestamp.isSome:
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# We are producing the transition payload and there's a value specified
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# for this specific payload
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return EthTime cl.transitionPayloadTimestamp.get
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return cl.latestHeader.timestamp + cl.getTimestampIncrement()
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func setNextWithdrawals(cl: CLMocker, nextWithdrawals: Option[seq[WithdrawalV1]]) =
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cl.nextWithdrawals = nextWithdrawals
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func isShanghai(cl: CLMocker, timestamp: Quantity): bool =
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let ts = EthTime(timestamp.uint64)
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cl.com.isShanghaiOrLater(ts)
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func isCancun(cl: CLMocker, timestamp: Quantity): bool =
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let ts = EthTime(timestamp.uint64)
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cl.com.isCancunOrLater(ts)
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# Picks the next payload producer from the set of clients registered
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proc pickNextPayloadProducer(cl: CLMocker): bool =
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doAssert cl.clients.len != 0
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for i in 0 ..< cl.clients.len:
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# Get a client to generate the payload
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let id = (cl.latestHeadNumber.int + i) mod cl.clients.len
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cl.nextBlockProducer = cl.clients[id]
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# Get latest header. Number and hash must coincide with our view of the chain,
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# and only then we can build on top of this client's chain
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var latestHeader: common.BlockHeader
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let res = cl.nextBlockProducer.client.latestHeader(latestHeader)
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if res.isErr:
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error "CLMocker: Could not get latest block header while selecting client for payload production",
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msg=res.error
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return false
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let lastBlockHash = latestHeader.blockHash
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if cl.latestHeader.blockHash != lastBlockHash or
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cl.latestHeadNumber != latestHeader.blockNumber.truncate(uint64):
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# Selected client latest block hash does not match canonical chain, try again
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cl.nextBlockProducer = nil
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continue
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else:
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break
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doAssert cl.nextBlockProducer != nil
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return true
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proc generatePayloadAttributes(cl: CLMocker) =
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# Generate a random value for the PrevRandao field
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var nextPrevRandao: common.Hash256
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doAssert randomBytes(nextPrevRandao.data) == 32
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let timestamp = Quantity cl.getNextBlockTimestamp.uint64
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cl.latestPayloadAttributes = PayloadAttributes(
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timestamp: timestamp,
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prevRandao: FixedBytes[32] nextPrevRandao.data,
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suggestedFeeRecipient: Address cl.nextFeeRecipient,
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)
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if cl.isShanghai(timestamp):
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cl.latestPayloadAttributes.withdrawals = cl.nextWithdrawals
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if cl.isCancun(timestamp):
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# Write a deterministic hash based on the block number
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let beaconRoot = timestampToBeaconRoot(timestamp)
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cl.latestPayloadAttributes.parentBeaconBlockRoot = some(beaconRoot)
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# Save random value
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let number = cl.latestHeader.blockNumber.truncate(uint64) + 1
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cl.prevRandaoHistory[number] = nextPrevRandao
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proc requestNextPayload(cl: CLMocker): bool =
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let version = cl.latestPayloadAttributes.version
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let client = cl.nextBlockProducer.client
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let res = client.forkchoiceUpdated(version, cl.latestForkchoice, some(cl.latestPayloadAttributes))
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if res.isErr:
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error "CLMocker: Could not send forkchoiceUpdated", version=version, msg=res.error
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return false
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let s = res.get()
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if s.payloadStatus.status != PayloadExecutionStatus.valid:
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error "CLMocker: Unexpected forkchoiceUpdated Response from Payload builder",
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status=s.payloadStatus.status
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return false
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if s.payloadStatus.latestValidHash.isNone or s.payloadStatus.latestValidHash.get != cl.latestForkchoice.headBlockHash:
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error "CLMocker: Unexpected forkchoiceUpdated LatestValidHash Response from Payload builder",
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latest=s.payloadStatus.latestValidHash,
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head=cl.latestForkchoice.headBlockHash
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return false
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doAssert s.payLoadID.isSome
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cl.nextPayloadID = s.payloadID.get()
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return true
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proc getPayload(cl: CLMocker, payloadId: PayloadID): Result[GetPayloadResponse, string] =
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let ts = cl.latestPayloadAttributes.timestamp
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let client = cl.nextBlockProducer.client
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if cl.isCancun(ts):
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client.getPayload(payloadId, Version.V3)
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elif cl.isShanghai(ts):
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client.getPayload(payloadId, Version.V2)
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else:
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client.getPayload(payloadId, Version.V1)
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proc getNextPayload(cl: CLMocker): bool =
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let res = cl.getPayload(cl.nextPayloadID)
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if res.isErr:
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error "CLMocker: Could not getPayload",
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payloadID=toHex(cl.nextPayloadID)
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return false
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let x = res.get()
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cl.latestPayloadBuilt = x.executionPayload
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cl.latestBlockValue = x.blockValue
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cl.latestBlobsBundle = x.blobsBundle
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cl.latestShouldOverrideBuilder = x.shouldOverrideBuilder
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let beaconRoot = ethHash cl.latestPayloadAttributes.parentBeaconblockRoot
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let header = blockHeader(cl.latestPayloadBuilt, beaconRoot)
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let blockHash = w3Hash header.blockHash
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if blockHash != cl.latestPayloadBuilt.blockHash:
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error "CLMocker: getNextPayload blockHash mismatch",
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expected=cl.latestPayloadBuilt.blockHash,
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get=blockHash.toHex
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return false
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if cl.latestPayloadBuilt.timestamp != cl.latestPayloadAttributes.timestamp:
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error "CLMocker: Incorrect Timestamp on payload built",
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expect=cl.latestPayloadBuilt.timestamp.uint64,
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get=cl.latestPayloadAttributes.timestamp.uint64
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return false
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if cl.latestPayloadBuilt.feeRecipient != cl.latestPayloadAttributes.suggestedFeeRecipient:
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error "CLMocker: Incorrect SuggestedFeeRecipient on payload built",
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expect=cl.latestPayloadBuilt.feeRecipient,
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get=cl.latestPayloadAttributes.suggestedFeeRecipient
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return false
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if cl.latestPayloadBuilt.prevRandao != cl.latestPayloadAttributes.prevRandao:
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error "CLMocker: Incorrect PrevRandao on payload built",
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expect=cl.latestPayloadBuilt.prevRandao,
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get=cl.latestPayloadAttributes.prevRandao
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return false
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if cl.latestPayloadBuilt.parentHash != BlockHash cl.latestHeader.blockHash.data:
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error "CLMocker: Incorrect ParentHash on payload built",
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expect=cl.latestPayloadBuilt.parentHash,
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get=cl.latestHeader.blockHash
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return false
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if cl.latestPayloadBuilt.blockNumber.uint64.toBlockNumber != cl.latestHeader.blockNumber + 1.toBlockNumber:
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error "CLMocker: Incorrect Number on payload built",
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expect=cl.latestPayloadBuilt.blockNumber.uint64,
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get=cl.latestHeader.blockNumber+1.toBlockNumber
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return false
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return true
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func versionedHashes(bb: BlobsBundleV1): seq[Web3Hash] =
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#doAssert(bb.commitments.len > 0)
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result = newSeqOfCap[BlockHash](bb.commitments.len)
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for com in bb.commitments:
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var h = keccakHash(com.bytes)
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h.data[0] = VERSIONED_HASH_VERSION_KZG
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result.add w3Hash h
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proc broadcastNewPayload(cl: CLMocker, payload: ExecutionPayload): Result[PayloadStatusV1, string] =
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var versionedHashes: seq[Web3Hash]
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if cl.latestBlobsBundle.isSome:
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# Broadcast the blob bundle to all clients
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versionedHashes = versionedHashes(cl.latestBlobsBundle.get)
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case payload.version
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of Version.V1: return cl.client.newPayloadV1(payload.V1)
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of Version.V2: return cl.client.newPayloadV2(payload.V2)
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of Version.V3: return cl.client.newPayloadV3(payload.V3,
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versionedHashes,
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cl.latestPayloadAttributes.parentBeaconBlockRoot.get)
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proc broadcastNextNewPayload(cl: CLMocker): bool =
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let res = cl.broadcastNewPayload(cl.latestPayloadBuilt)
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if res.isErr:
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error "CLMocker: broadcastNewPayload Error", msg=res.error
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return false
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let s = res.get()
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if s.status == PayloadExecutionStatus.valid:
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# The client is synced and the payload was immediately validated
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# https:#github.com/ethereum/execution-apis/blob/main/src/engine/specification.md:
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# - If validation succeeds, the response MUST contain {status: VALID, latestValidHash: payload.blockHash}
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let blockHash = cl.latestPayloadBuilt.blockHash
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if s.latestValidHash.isNone:
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error "CLMocker: NewPayload returned VALID status with nil LatestValidHash",
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expected=blockHash.toHex
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return false
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let latestValidHash = s.latestValidHash.get()
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if latestValidHash != BlockHash(blockHash):
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error "CLMocker: NewPayload returned VALID status with incorrect LatestValidHash",
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get=latestValidHash.toHex, expected=blockHash.toHex
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return false
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elif s.status == PayloadExecutionStatus.accepted:
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# The client is not synced but the payload was accepted
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# https:#github.com/ethereum/execution-apis/blob/main/src/engine/specification.md:
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# - {status: ACCEPTED, latestValidHash: null, validationError: null} if the following conditions are met:
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# the blockHash of the payload is valid
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# the payload doesn't extend the canonical chain
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# the payload hasn't been fully validated.
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let nullHash = BlockHash common.Hash256().data
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let latestValidHash = s.latestValidHash.get(nullHash)
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if s.latestValidHash.isSome and latestValidHash != nullHash:
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error "CLMocker: NewPayload returned ACCEPTED status with incorrect LatestValidHash",
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hash=latestValidHash.toHex
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return false
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else:
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error "CLMocker: broadcastNewPayload Response",
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status=s.status
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return false
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cl.latestExecutedPayload = cl.latestPayloadBuilt
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let number = uint64 cl.latestPayloadBuilt.blockNumber
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cl.executedPayloadHistory[number] = cl.latestPayloadBuilt
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return true
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proc broadcastForkchoiceUpdated(cl: CLMocker,
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update: ForkchoiceStateV1): Result[ForkchoiceUpdatedResponse, string] =
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let version = cl.latestExecutedPayload.version
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let client = cl.nextBlockProducer.client
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client.forkchoiceUpdated(version, update, none(PayloadAttributes))
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proc broadcastLatestForkchoice(cl: CLMocker): bool =
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let res = cl.broadcastForkchoiceUpdated(cl.latestForkchoice)
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if res.isErr:
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error "CLMocker: broadcastForkchoiceUpdated Error", msg=res.error
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return false
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let s = res.get()
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if s.payloadStatus.status != PayloadExecutionStatus.valid:
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error "CLMocker: broadcastForkchoiceUpdated Response",
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status=s.payloadStatus.status
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return false
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if s.payloadStatus.latestValidHash.get != cl.latestForkchoice.headBlockHash:
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error "CLMocker: Incorrect LatestValidHash from ForkchoiceUpdated",
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get=s.payloadStatus.latestValidHash.get.toHex,
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expect=cl.latestForkchoice.headBlockHash.toHex
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if s.payloadStatus.validationError.isSome:
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error "CLMocker: Expected empty validationError",
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msg=s.payloadStatus.validationError.get
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if s.payloadID.isSome:
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error "CLMocker: Expected empty PayloadID",
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msg=s.payloadID.get.toHex
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return true
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func w3Address(x: int): Web3Address =
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var res: array[20, byte]
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res[^1] = x.byte
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Web3Address(res)
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proc makeNextWithdrawals(cl: CLMocker): seq[WithdrawalV1] =
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var
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withdrawalCount = 10
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withdrawalIndex = 0'u64
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if cl.latestPayloadBuilt.withdrawals.isSome:
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let wds = cl.latestPayloadBuilt.withdrawals.get
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for w in wds:
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if w.index.uint64 > withdrawalIndex:
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withdrawalIndex = w.index.uint64
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var
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withdrawals = newSeq[WithdrawalV1](withdrawalCount)
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for i in 0..<withdrawalCount:
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withdrawalIndex += 1
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withdrawals[i] = WithdrawalV1(
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index: w3Qty withdrawalIndex,
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validatorIndex: w3Qty i,
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address: w3Address i,
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amount: w3Qty 100'u64,
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)
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return withdrawals
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proc produceSingleBlock*(cl: CLMocker, cb: BlockProcessCallbacks): bool {.gcsafe.} =
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doAssert(cl.ttdReached)
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cl.currentPayloadNumber = cl.latestHeader.blockNumber.truncate(uint64) + 1'u64
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if not cl.pickNextPayloadProducer():
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return false
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# Check if next withdrawals necessary, test can override this value on
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# `OnPayloadProducerSelected` callback
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if cl.nextWithdrawals.isNone:
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let nw = cl.makeNextWithdrawals()
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cl.setNextWithdrawals(some(nw))
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if cb.onPayloadProducerSelected != nil:
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if not cb.onPayloadProducerSelected():
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return false
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cl.generatePayloadAttributes()
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if cb.onPayloadAttributesGenerated != nil:
|
|
if not cb.onPayloadAttributesGenerated():
|
|
return false
|
|
|
|
if not cl.requestNextPayload():
|
|
return false
|
|
|
|
cl.setNextWithdrawals(none(seq[WithdrawalV1]))
|
|
|
|
if cb.onRequestNextPayload != nil:
|
|
if not cb.onRequestNextPayload():
|
|
return false
|
|
|
|
# Give the client a delay between getting the payload ID and actually retrieving the payload
|
|
if cl.payloadProductionClientDelay != 0:
|
|
let period = chronos.seconds(cl.payloadProductionClientDelay)
|
|
waitFor sleepAsync(period)
|
|
|
|
if not cl.getNextPayload():
|
|
return false
|
|
|
|
if cb.onGetPayload != nil:
|
|
if not cb.onGetPayload():
|
|
return false
|
|
|
|
if not cl.broadcastNextNewPayload():
|
|
return false
|
|
|
|
if cb.onNewPayloadBroadcast != nil:
|
|
if not cb.onNewPayloadBroadcast():
|
|
return false
|
|
|
|
# Broadcast forkchoice updated with new HeadBlock to all clients
|
|
let previousForkchoice = cl.latestForkchoice
|
|
cl.headHashHistory.add cl.latestPayloadBuilt.blockHash
|
|
|
|
cl.latestForkchoice = ForkchoiceStateV1()
|
|
cl.latestForkchoice.headBlockHash = cl.latestPayloadBuilt.blockHash
|
|
|
|
let hhLen = cl.headHashHistory.len
|
|
if hhLen > cl.slotsToSafe:
|
|
cl.latestForkchoice.safeBlockHash = cl.headHashHistory[hhLen - cl.slotsToSafe - 1]
|
|
|
|
if hhLen > cl.slotsToFinalized:
|
|
cl.latestForkchoice.finalizedBlockHash = cl.headHashHistory[hhLen - cl.slotsToFinalized - 1]
|
|
|
|
if not cl.broadcastLatestForkchoice():
|
|
return false
|
|
|
|
if cb.onForkchoiceBroadcast != nil:
|
|
if not cb.onForkchoiceBroadcast():
|
|
return false
|
|
|
|
# Broadcast forkchoice updated with new SafeBlock to all clients
|
|
if cb.onSafeBlockChange != nil and cl.latestForkchoice.safeBlockHash != previousForkchoice.safeBlockHash:
|
|
if not cb.onSafeBlockChange():
|
|
return false
|
|
|
|
# Broadcast forkchoice updated with new FinalizedBlock to all clients
|
|
if cb.onFinalizedBlockChange != nil and cl.latestForkchoice.finalizedBlockHash != previousForkchoice.finalizedBlockHash:
|
|
if not cb.onFinalizedBlockChange():
|
|
return false
|
|
|
|
# Broadcast forkchoice updated with new FinalizedBlock to all clients
|
|
# Save the number of the first PoS block
|
|
if cl.firstPoSBlockNumber.isNone:
|
|
let number = cl.latestHeader.blockNumber.truncate(uint64) + 1
|
|
cl.firstPoSBlockNumber = some(number)
|
|
|
|
# Save the header of the latest block in the PoS chain
|
|
cl.latestHeadNumber = cl.latestHeadNumber + 1
|
|
|
|
# Check if any of the clients accepted the new payload
|
|
var newHeader: common.BlockHeader
|
|
let res = cl.client.headerByNumber(cl.latestHeadNumber, newHeader)
|
|
if res.isErr:
|
|
error "CLMock ProduceSingleBlock", msg=res.error
|
|
return false
|
|
|
|
let newHash = BlockHash newHeader.blockHash.data
|
|
if newHash != cl.latestPayloadBuilt.blockHash:
|
|
error "CLMocker: None of the clients accepted the newly constructed payload",
|
|
hash=newHash.toHex
|
|
return false
|
|
|
|
# Check that the new finalized header has the correct properties
|
|
# ommersHash == 0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347
|
|
if newHeader.ommersHash != EMPTY_UNCLE_HASH:
|
|
error "CLMocker: Client produced a new header with incorrect ommersHash", ommersHash = newHeader.ommersHash
|
|
return false
|
|
|
|
# difficulty == 0
|
|
if newHeader.difficulty != 0.u256:
|
|
error "CLMocker: Client produced a new header with incorrect difficulty", difficulty = newHeader.difficulty
|
|
return false
|
|
|
|
# mixHash == prevRandao
|
|
if newHeader.mixDigest != cl.prevRandaoHistory[cl.latestHeadNumber]:
|
|
error "CLMocker: Client produced a new header with incorrect mixHash",
|
|
get = newHeader.mixDigest.data.toHex,
|
|
expect = cl.prevRandaoHistory[cl.latestHeadNumber].data.toHex
|
|
return false
|
|
|
|
# nonce == 0x0000000000000000
|
|
if newHeader.nonce != default(BlockNonce):
|
|
error "CLMocker: Client produced a new header with incorrect nonce",
|
|
nonce = newHeader.nonce.toHex
|
|
return false
|
|
|
|
if newHeader.extraData.len > 32:
|
|
error "CLMocker: Client produced a new header with incorrect extraData (len > 32)",
|
|
len = newHeader.extraData.len
|
|
return false
|
|
|
|
cl.latestHeader = newHeader
|
|
cl.headerHistory[cl.latestHeadNumber] = cl.latestHeader
|
|
|
|
return true
|
|
|
|
# Loop produce PoS blocks by using the Engine API
|
|
proc produceBlocks*(cl: CLMocker, blockCount: int, cb: BlockProcessCallbacks): bool {.gcsafe.} =
|
|
# Produce requested amount of blocks
|
|
for i in 0..<blockCount:
|
|
if not cl.produceSingleBlock(cb):
|
|
return false
|
|
return true
|
|
|
|
proc posBlockNumber*(cl: CLMocker): uint64 =
|
|
cl.firstPoSBlockNumber.get(0'u64)
|