271 lines
9.3 KiB
Nim
271 lines
9.3 KiB
Nim
# Nimbus
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# Copyright (c) 2018-2024 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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{.push raises: [].}
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import
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results,
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../../db/ledger,
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../../evm/state,
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../../evm/types,
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../executor,
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../validate,
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./chain_desc,
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chronicles,
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stint
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when not defined(release):
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import
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#../../tracer,
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../../utils/utils
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export results
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type
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PersistBlockFlag* = enum
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NoFullValidation # Validate the batch instead of validating each block in it
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NoPersistHeader
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NoPersistTransactions
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NoPersistUncles
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NoPersistWithdrawals
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NoPersistReceipts
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PersistBlockFlags* = set[PersistBlockFlag]
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PersistStats = tuple[blocks: int, txs: int, gas: GasInt]
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const
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NoPersistBodies* = {NoPersistTransactions, NoPersistUncles, NoPersistWithdrawals}
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CleanUpEpoch = 30_000.BlockNumber
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## Regular checks for history clean up (applies to single state DB). This
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## is mainly a debugging/testing feature so that the database can be held
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## a bit smaller. It is not applicable to a full node.
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# ------------------------------------------------------------------------------
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# Private
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# ------------------------------------------------------------------------------
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proc getVmState(c: ChainRef, header: BlockHeader): Result[BaseVMState, string] =
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if not c.vmState.isNil:
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return ok(c.vmState)
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let vmState = BaseVMState()
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if not vmState.init(header, c.com):
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return err("Could not initialise VMState")
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ok(vmState)
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proc purgeOlderBlocksFromHistory(db: CoreDbRef, bn: BlockNumber) =
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## Remove non-reachable blocks from KVT database
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if 0 < bn:
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var blkNum = bn - 1
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while 0 < blkNum:
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try:
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if not db.forgetHistory blkNum:
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break
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except RlpError as exc:
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warn "Error forgetting history", err = exc.msg
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blkNum = blkNum - 1
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proc persistBlocksImpl(
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c: ChainRef, blocks: openArray[EthBlock], flags: PersistBlockFlags = {}
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): Result[PersistStats, string] =
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let dbTx = c.db.newTransaction()
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defer:
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dbTx.dispose()
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c.com.hardForkTransition(blocks[0].header)
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# Note that `0 < headers.len`, assured when called from `persistBlocks()`
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let
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vmState = ?c.getVmState(blocks[0].header)
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fromBlock = blocks[0].header.number
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toBlock = blocks[blocks.high()].header.number
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trace "Persisting blocks", fromBlock, toBlock
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var
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blks = 0
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txs = 0
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gas = GasInt(0)
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parentHash: Hash256 # only needed after the first block
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for blk in blocks:
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template header(): BlockHeader =
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blk.header
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# Full validation means validating the state root at every block and
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# performing the more expensive hash computations on the block itself, ie
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# verifying that the transaction and receipts roots are valid - when not
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# doing full validation, we skip these expensive checks relying instead
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# on the source of the data to have performed them previously or because
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# the cost of failure is low.
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# TODO Figure out the right balance for header fields - in particular, if
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# we receive instruction from the CL while syncing that a block is
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# CL-valid, do we skip validation while "far from head"? probably yes.
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# This requires performing a header-chain validation from that CL-valid
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# block which the current code doesn't express.
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# Also, the potential avenues for corruption should be described with
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# more rigor, ie if the txroot doesn't match but everything else does,
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# can the state root of the last block still be correct? Dubious, but
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# what would be the consequences? We would roll back the full set of
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# blocks which is fairly low-cost.
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let skipValidation = NoFullValidation in flags and header.number != toBlock
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c.com.hardForkTransition(header)
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if blks > 0:
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template parent(): BlockHeader =
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blocks[blks - 1].header
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let updated =
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if header.number == parent.number + 1 and header.parentHash == parentHash:
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vmState.reinit(parent = parent, header = header, linear = true)
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else:
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# TODO remove this code path and process only linear histories in this
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# function
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vmState.reinit(header = header)
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if not updated:
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debug "Cannot update VmState", blockNumber = header.number
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return err("Cannot update VmState to block " & $header.number)
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else:
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# TODO weirdly, some tests depend on this reinit being called, even though
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# in theory it's a fresh instance that should not need it (?)
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doAssert vmState.reinit(header = header)
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# TODO even if we're skipping validation, we should perform basic sanity
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# checks on the block and header - that fields are sanely set for the
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# given hard fork and similar path-independent checks - these same
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# sanity checks should be performed early in the processing pipeline no
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# matter their provenance.
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if not skipValidation and c.extraValidation and c.verifyFrom <= header.number:
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# TODO: how to checkseal from here
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?c.com.validateHeaderAndKinship(blk, vmState.parent, checkSealOK = false)
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# Generate receipts for storage or validation but skip them otherwise
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?vmState.processBlock(
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blk,
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skipValidation,
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skipReceipts = skipValidation and NoPersistReceipts in flags,
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skipUncles = NoPersistUncles in flags,
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)
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# when defined(nimbusDumpDebuggingMetaData):
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# if validationResult == ValidationResult.Error and
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# body.transactions.calcTxRoot == header.txRoot:
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# vmState.dumpDebuggingMetaData(header, body)
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# warn "Validation error. Debugging metadata dumped."
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let blockHash = header.blockHash()
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if NoPersistHeader notin flags:
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if not c.db.persistHeader(
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blockHash, header, c.com.consensus == ConsensusType.POS, c.com.startOfHistory
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):
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return err("Could not persist header")
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if NoPersistTransactions notin flags:
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c.db.persistTransactions(header.number, blk.transactions)
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if NoPersistReceipts notin flags:
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c.db.persistReceipts(vmState.receipts)
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if NoPersistWithdrawals notin flags and blk.withdrawals.isSome:
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c.db.persistWithdrawals(blk.withdrawals.get)
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# update currentBlock *after* we persist it
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# so the rpc return consistent result
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# between eth_blockNumber and eth_syncing
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c.com.syncCurrent = header.number
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blks += 1
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txs += blk.transactions.len
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gas += blk.header.gasUsed
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parentHash = blockHash
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dbTx.commit()
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# Save and record the block number before the last saved block state.
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c.db.persistent(toBlock).isOkOr:
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return err("Failed to save state: " & $$error)
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if c.com.pruneHistory:
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# There is a feature for test systems to regularly clean up older blocks
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# from the database, not appicable to a full node set up.
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let n = fromBlock div CleanUpEpoch
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if 0 < n and n < (toBlock div CleanUpEpoch):
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# Starts at around `2 * CleanUpEpoch`
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try:
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c.db.purgeOlderBlocksFromHistory(fromBlock - CleanUpEpoch)
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except CatchableError as exc:
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warn "Could not clean up old blocks from history", err = exc.msg
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ok((blks, txs, gas))
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# ------------------------------------------------------------------------------
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# Public `ChainDB` methods
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# ------------------------------------------------------------------------------
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proc insertBlockWithoutSetHead*(c: ChainRef, blk: EthBlock): Result[void, string] =
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discard ?c.persistBlocksImpl([blk], {NoPersistHeader, NoPersistReceipts})
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if not c.db.persistHeader(blk.header.blockHash, blk.header, c.com.startOfHistory):
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return err("Could not persist header")
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ok()
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proc setCanonical*(c: ChainRef, header: BlockHeader): Result[void, string] =
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if header.parentHash == Hash256():
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try:
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if not c.db.setHead(header.blockHash):
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return err("setHead failed")
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except RlpError as exc:
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# TODO fix exception+bool error return
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return err(exc.msg)
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return ok()
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var body: BlockBody
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try:
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if not c.db.getBlockBody(header, body):
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debug "Failed to get BlockBody", hash = header.blockHash
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return err("Could not get block body")
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except RlpError as exc:
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return err(exc.msg)
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discard
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?c.persistBlocksImpl(
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[EthBlock.init(header, move(body))], {NoPersistHeader, NoPersistTransactions}
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)
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try:
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discard c.db.setHead(header.blockHash)
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except RlpError as exc:
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return err(exc.msg)
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ok()
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proc setCanonical*(c: ChainRef, blockHash: Hash256): Result[void, string] =
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var header: BlockHeader
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if not c.db.getBlockHeader(blockHash, header):
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debug "Failed to get BlockHeader", hash = blockHash
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return err("Could not get block header")
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setCanonical(c, header)
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proc persistBlocks*(
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c: ChainRef, blocks: openArray[EthBlock], flags: PersistBlockFlags = {}
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): Result[PersistStats, string] =
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# Run the VM here
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if blocks.len == 0:
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debug "Nothing to do"
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return ok(default(PersistStats)) # TODO not nice to return nil
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c.persistBlocksImpl(blocks, flags)
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# ------------------------------------------------------------------------------
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# End
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# ------------------------------------------------------------------------------
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