400 lines
14 KiB
Nim
400 lines
14 KiB
Nim
# Nimbus
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# Copyright (c) 2018 Status Research & Development GmbH
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# Licensed under either of
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# * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
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# http://www.apache.org/licenses/LICENSE-2.0)
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# * MIT license ([LICENSE-MIT](LICENSE-MIT) or
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# http://opensource.org/licenses/MIT)
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# at your option. This file may not be copied, modified, or distributed except
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# according to those terms.
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## Transaction Pool Block Chain Packer Environment
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## ===============================================
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##
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import
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std/times,
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../../common/common,
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../../constants,
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../../db/accounts_cache,
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../../utils/utils,
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../../vm_state,
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../../vm_types,
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../clique/[clique_sealer, clique_desc, clique_cfg],
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../pow/difficulty,
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../executor,
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../casper,
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./tx_chain/[tx_basefee, tx_gaslimits],
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./tx_item
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export
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TxChainGasLimits,
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TxChainGasLimitsPc
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{.push raises: [].}
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const
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TRG_THRESHOLD_PER_CENT = ##\
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## VM executor may stop if this per centage of `trgLimit` has
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## been reached.
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90
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MAX_THRESHOLD_PER_CENT = ##\
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## VM executor may stop if this per centage of `maxLimit` has
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## been reached.
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90
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type
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TxChainPackerEnv = tuple
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vmState: BaseVMState ## current tx/packer environment
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receipts: seq[Receipt] ## `vmState.receipts` after packing
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reward: UInt256 ## Miner balance difference after packing
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profit: UInt256 ## Net reward (w/o PoW specific block rewards)
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txRoot: Hash256 ## `rootHash` after packing
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stateRoot: Hash256 ## `stateRoot` after packing
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blobGasUsed:
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Option[uint64] ## EIP-4844 block blobGasUsed
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excessBlobGas:
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Option[uint64] ## EIP-4844 block excessBlobGas
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TxChainRef* = ref object ##\
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## State cache of the transaction environment for creating a new\
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## block. This state is typically synchrionised with the canonical\
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## block chain head when updated.
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com: CommonRef ## Block chain config
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miner: EthAddress ## Address of fee beneficiary
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lhwm: TxChainGasLimitsPc ## Hwm/lwm gas limit percentage
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maxMode: bool ## target or maximal limit for next block header
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roAcc: ReadOnlyStateDB ## Accounts cache fixed on current sync header
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limits: TxChainGasLimits ## Gas limits for packer and next header
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txEnv: TxChainPackerEnv ## Assorted parameters, tx packer environment
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prepHeader: BlockHeader ## Prepared Header from Consensus Engine
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withdrawals: seq[Withdrawal] ## EIP-4895
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# ------------------------------------------------------------------------------
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# Private functions
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# ------------------------------------------------------------------------------
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proc prepareHeader(dh: TxChainRef; parent: BlockHeader, timestamp: EthTime)
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{.gcsafe, raises: [CatchableError].} =
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case dh.com.consensus
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of ConsensusType.POW:
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dh.prepHeader.timestamp = timestamp
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dh.prepHeader.difficulty = dh.com.calcDifficulty(
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dh.prepHeader.timestamp, parent)
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dh.prepHeader.coinbase = dh.miner
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dh.prepHeader.mixDigest.reset
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of ConsensusType.POA:
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discard dh.com.poa.prepare(parent, dh.prepHeader)
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# beware POA header.coinbase != signerAddress
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# but BaseVMState.minerAddress == signerAddress
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# - minerAddress is extracted from header.extraData
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# - header.coinbase is from clique engine
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of ConsensusType.POS:
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dh.com.pos.prepare(dh.prepHeader)
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proc prepareForSeal(dh: TxChainRef; header: var BlockHeader) {.gcsafe, raises: [].} =
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case dh.com.consensus
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of ConsensusType.POW:
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# do nothing, tx pool was designed with POW in mind
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discard
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of ConsensusType.POA:
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dh.com.poa.prepareForSeal(dh.prepHeader, header)
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of ConsensusType.POS:
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dh.com.pos.prepareForSeal(header)
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proc getTimestamp(dh: TxChainRef, parent: BlockHeader): EthTime =
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case dh.com.consensus
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of ConsensusType.POW:
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getTime().utc.toTime
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of ConsensusType.POA:
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let timestamp = parent.timestamp + dh.com.poa.cfg.period
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if timestamp < getTime():
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getTime()
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else:
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timestamp
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of ConsensusType.POS:
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dh.com.pos.timestamp
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proc feeRecipient*(dh: TxChainRef): EthAddress {.gcsafe.}
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proc resetTxEnv(dh: TxChainRef; parent: BlockHeader; fee: Option[UInt256])
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{.gcsafe,raises: [CatchableError].} =
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dh.txEnv.reset
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# do hardfork transition before
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# BaseVMState querying any hardfork/consensus from CommonRef
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let timestamp = dh.getTimestamp(parent)
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dh.com.hardForkTransition(parent.blockHash, parent.blockNumber+1, some(timestamp))
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dh.prepareHeader(parent, timestamp)
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# we don't consider PoS difficulty here
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# because that is handled in vmState
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dh.txEnv.vmState = BaseVMState.new(
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parent = parent,
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timestamp = dh.prepHeader.timestamp,
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gasLimit = (if dh.maxMode: dh.limits.maxLimit else: dh.limits.trgLimit),
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fee = fee,
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prevRandao= dh.prepHeader.prevRandao,
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difficulty= dh.prepHeader.difficulty,
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miner = dh.feeRecipient,
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com = dh.com)
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dh.txEnv.txRoot = EMPTY_ROOT_HASH
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dh.txEnv.stateRoot = dh.txEnv.vmState.parent.stateRoot
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dh.txEnv.blobGasUsed = none(uint64)
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dh.txEnv.excessBlobGas = none(uint64)
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proc update(dh: TxChainRef; parent: BlockHeader)
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{.gcsafe,raises: [CatchableError].} =
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let
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timestamp = dh.getTimestamp(parent)
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db = dh.com.db
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acc = AccountsCache.init(db, parent.stateRoot, dh.com.pruneTrie)
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fee = if dh.com.isLondon(parent.blockNumber + 1, timestamp):
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some(dh.com.baseFeeGet(parent).uint64.u256)
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else:
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UInt256.none()
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# Keep a separate accounts descriptor positioned at the sync point
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dh.roAcc = ReadOnlyStateDB(acc)
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dh.limits = dh.com.gasLimitsGet(parent, dh.lhwm)
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dh.resetTxEnv(parent, fee)
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# ------------------------------------------------------------------------------
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# Public functions, constructor
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# ------------------------------------------------------------------------------
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proc new*(T: type TxChainRef; com: CommonRef; miner: EthAddress): T
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{.gcsafe,raises: [CatchableError].} =
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## Constructor
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new result
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result.com = com
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result.miner = miner
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result.lhwm.lwmTrg = TRG_THRESHOLD_PER_CENT
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result.lhwm.hwmMax = MAX_THRESHOLD_PER_CENT
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result.lhwm.gasFloor = DEFAULT_GAS_LIMIT
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result.lhwm.gasCeil = DEFAULT_GAS_LIMIT
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result.update(com.db.getCanonicalHead)
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# ------------------------------------------------------------------------------
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# Public functions
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# ------------------------------------------------------------------------------
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proc getBalance*(dh: TxChainRef; account: EthAddress): UInt256 =
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## Wrapper around `vmState.readOnlyStateDB.getBalance()` for a `vmState`
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## descriptor positioned at the `dh.head`. This might differ from the
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## `dh.vmState.readOnlyStateDB.getBalance()` which returnes the current
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## balance relative to what has been accumulated by the current packing
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## procedure.
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dh.roAcc.getBalance(account)
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proc getNonce*(dh: TxChainRef; account: EthAddress): AccountNonce =
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## Wrapper around `vmState.readOnlyStateDB.getNonce()` for a `vmState`
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## descriptor positioned at the `dh.head`. This might differ from the
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## `dh.vmState.readOnlyStateDB.getNonce()` which returnes the current balance
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## relative to what has been accumulated by the current packing procedure.
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dh.roAcc.getNonce(account)
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proc getHeader*(dh: TxChainRef): BlockHeader
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{.gcsafe,raises: [CatchableError].} =
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## Generate a new header, a child of the cached `head`
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let gasUsed = if dh.txEnv.receipts.len == 0: 0.GasInt
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else: dh.txEnv.receipts[^1].cumulativeGasUsed
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result = BlockHeader(
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parentHash: dh.txEnv.vmState.parent.blockHash,
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ommersHash: EMPTY_UNCLE_HASH,
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coinbase: dh.prepHeader.coinbase,
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stateRoot: dh.txEnv.stateRoot,
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txRoot: dh.txEnv.txRoot,
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receiptRoot: dh.txEnv.receipts.calcReceiptRoot,
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bloom: dh.txEnv.receipts.createBloom,
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difficulty: dh.prepHeader.difficulty,
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blockNumber: dh.txEnv.vmState.blockNumber,
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gasLimit: dh.txEnv.vmState.gasLimit,
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gasUsed: gasUsed,
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timestamp: dh.prepHeader.timestamp,
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# extraData: Blob # signing data
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# mixDigest: Hash256 # mining hash for given difficulty
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# nonce: BlockNonce # mining free vaiable
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fee: dh.txEnv.vmState.fee,
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blobGasUsed: dh.txEnv.blobGasUsed,
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excessBlobGas: dh.txEnv.excessBlobGas)
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if dh.com.forkGTE(Shanghai):
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result.withdrawalsRoot = some(calcWithdrawalsRoot(dh.withdrawals))
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if dh.com.forkGTE(Cancun):
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result.parentBeaconBlockRoot = some(dh.com.pos.parentBeaconBlockRoot)
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dh.prepareForSeal(result)
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proc clearAccounts*(dh: TxChainRef)
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{.gcsafe,raises: [CatchableError].} =
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## Reset transaction environment, e.g. before packing a new block
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dh.resetTxEnv(dh.txEnv.vmState.parent, dh.txEnv.vmState.fee)
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# ------------------------------------------------------------------------------
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# Public functions, getters
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# ------------------------------------------------------------------------------
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proc com*(dh: TxChainRef): CommonRef =
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## Getter
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dh.com
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proc head*(dh: TxChainRef): BlockHeader =
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## Getter
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dh.txEnv.vmState.parent
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proc limits*(dh: TxChainRef): TxChainGasLimits =
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## Getter
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dh.limits
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proc lhwm*(dh: TxChainRef): TxChainGasLimitsPc =
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## Getter
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dh.lhwm
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proc maxMode*(dh: TxChainRef): bool =
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## Getter
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dh.maxMode
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proc feeRecipient*(dh: TxChainRef): EthAddress {.gcsafe.} =
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## Getter
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if dh.com.consensus == ConsensusType.POS:
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dh.com.pos.feeRecipient
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else:
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dh.miner
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proc baseFee*(dh: TxChainRef): GasPrice =
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## Getter, baseFee for the next bock header. This value is auto-generated
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## when a new insertion point is set via `head=`.
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if dh.txEnv.vmState.fee.isSome:
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dh.txEnv.vmState.fee.get.truncate(uint64).GasPrice
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else:
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0.GasPrice
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proc excessBlobGas*(dh: TxChainRef): uint64 =
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## Getter, baseFee for the next bock header. This value is auto-generated
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## when a new insertion point is set via `head=`.
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dh.txEnv.vmState.parent.excessBlobGas.get(0'u64)
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proc nextFork*(dh: TxChainRef): EVMFork =
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## Getter, fork of next block
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dh.com.toEVMFork(dh.txEnv.vmState.forkDeterminationInfoForVMState)
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proc gasUsed*(dh: TxChainRef): GasInt =
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## Getter, accumulated gas burned for collected blocks
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if 0 < dh.txEnv.receipts.len:
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return dh.txEnv.receipts[^1].cumulativeGasUsed
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proc profit*(dh: TxChainRef): UInt256 =
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## Getter
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dh.txEnv.profit
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proc receipts*(dh: TxChainRef): seq[Receipt] =
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## Getter, receipts for collected blocks
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dh.txEnv.receipts
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proc reward*(dh: TxChainRef): UInt256 =
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## Getter, reward for collected blocks
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dh.txEnv.reward
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proc stateRoot*(dh: TxChainRef): Hash256 =
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## Getter, accounting DB state root hash for the next block header
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dh.txEnv.stateRoot
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proc txRoot*(dh: TxChainRef): Hash256 =
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## Getter, transaction state root hash for the next block header
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dh.txEnv.txRoot
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proc vmState*(dh: TxChainRef): BaseVMState =
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## Getter, `BaseVmState` descriptor based on the current insertion point.
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dh.txEnv.vmState
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proc withdrawals*(dh: TxChainRef): seq[Withdrawal] =
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## Getter, `BaseVmState` descriptor based on the current insertion point.
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dh.withdrawals
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# ------------------------------------------------------------------------------
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# Public functions, setters
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# ------------------------------------------------------------------------------
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proc `baseFee=`*(dh: TxChainRef; val: GasPrice) =
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## Setter, temorarily overwrites parameter until next `head=` update. This
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## function would be called in exceptional cases only as this parameter is
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## determined by the `head=` update.
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if 0 < val or dh.com.isLondon(dh.txEnv.vmState.blockNumber):
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dh.txEnv.vmState.fee = some(val.uint64.u256)
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else:
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dh.txEnv.vmState.fee = UInt256.none()
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proc `head=`*(dh: TxChainRef; val: BlockHeader)
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{.gcsafe,raises: [CatchableError].} =
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## Setter, updates descriptor. This setter re-positions the `vmState` and
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## account caches to a new insertion point on the block chain database.
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dh.update(val)
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proc `lhwm=`*(dh: TxChainRef; val: TxChainGasLimitsPc) =
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## Setter, tuple `(lwmTrg,hwmMax)` will allow the packer to continue
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## up until the percentage level has been reached of the `trgLimit`, or
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## `maxLimit` depending on what has been activated.
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if dh.lhwm != val:
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dh.lhwm = val
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let parent = dh.txEnv.vmState.parent
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dh.limits = dh.com.gasLimitsGet(parent, dh.limits.gasLimit, dh.lhwm)
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dh.txEnv.vmState.gasLimit = if dh.maxMode: dh.limits.maxLimit
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else: dh.limits.trgLimit
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proc `maxMode=`*(dh: TxChainRef; val: bool) =
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## Setter, the packing mode (maximal or target limit) for the next block
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## header
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dh.maxMode = val
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dh.txEnv.vmState.gasLimit = if dh.maxMode: dh.limits.maxLimit
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else: dh.limits.trgLimit
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proc `miner=`*(dh: TxChainRef; val: EthAddress) =
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## Setter
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dh.miner = val
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dh.txEnv.vmState.minerAddress = val
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proc `profit=`*(dh: TxChainRef; val: UInt256) =
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## Setter
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dh.txEnv.profit = val
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proc `receipts=`*(dh: TxChainRef; val: seq[Receipt]) =
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## Setter, implies `gasUsed`
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dh.txEnv.receipts = val
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proc `reward=`*(dh: TxChainRef; val: UInt256) =
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## Getter
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dh.txEnv.reward = val
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proc `stateRoot=`*(dh: TxChainRef; val: Hash256) =
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## Setter
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dh.txEnv.stateRoot = val
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proc `txRoot=`*(dh: TxChainRef; val: Hash256) =
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## Setter
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dh.txEnv.txRoot = val
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proc `withdrawals=`*(dh: TxChainRef, val: sink seq[Withdrawal]) =
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dh.withdrawals = system.move(val)
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proc `excessBlobGas=`*(dh: TxChainRef; val: Option[uint64]) =
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## Setter
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dh.txEnv.excessBlobGas = val
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proc `blobGasUsed=`*(dh: TxChainRef; val: Option[uint64]) =
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## Setter
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dh.txEnv.blobGasUsed = val
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# ------------------------------------------------------------------------------
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# End
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# ------------------------------------------------------------------------------
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