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process_block.nim
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process_block.nim
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# Nimbus
# Copyright (c) 2018 Status Research & Development GmbH
# Licensed under either of
# * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
# https://www.apache.org/licenses/LICENSE-2.0)
# * MIT license ([LICENSE-MIT](LICENSE-MIT) or
# https://opensource.org/licenses/MIT)
# at your option. This file may not be copied, modified, or distributed except
# according to those terms.
import
../../constants,
../../db/[db_chain, accounts_cache],
../../transaction,
../../utils,
../../vm_state,
../../vm_types,
../clique,
../dao,
./calculate_reward,
./executor_helpers,
./process_transaction,
./update_poastate,
chronicles,
eth/[common, trie/db],
nimcrypto
{.push raises: [Defect].}
# ------------------------------------------------------------------------------
# Private functions
# ------------------------------------------------------------------------------
proc procBlkPreamble(vmState: BaseVMState; dbTx: DbTransaction;
header: BlockHeader, body: BlockBody): bool
{.gcsafe, raises: [Defect,CatchableError].} =
if vmState.chainDB.config.daoForkSupport and
vmState.chainDB.config.daoForkBlock == header.blockNumber:
vmState.mutateStateDB:
db.applyDAOHardFork()
if body.transactions.calcTxRoot != header.txRoot:
debug "Mismatched txRoot",
blockNumber = header.blockNumber
return false
if header.txRoot != BLANK_ROOT_HASH:
if body.transactions.len == 0:
debug "No transactions in body",
blockNumber = header.blockNumber
return false
else:
#trace "Has transactions",
# blockNumber = header.blockNumber,
# blockHash = header.blockHash
vmState.receipts = newSeq[Receipt](body.transactions.len)
vmState.cumulativeGasUsed = 0
for txIndex, tx in body.transactions:
var sender: EthAddress
if tx.getSender(sender):
discard tx.processTransaction(sender, vmState)
else:
debug "Could not get sender",
txIndex, tx
return false
vmState.receipts[txIndex] = vmState.makeReceipt(tx.txType)
if vmState.cumulativeGasUsed != header.gasUsed:
debug "gasUsed neq cumulativeGasUsed",
gasUsed = header.gasUsed,
cumulativeGasUsed = vmState.cumulativeGasUsed
return false
if header.ommersHash != EMPTY_UNCLE_HASH:
let h = vmState.chainDB.persistUncles(body.uncles)
if h != header.ommersHash:
debug "Uncle hash mismatch"
return false
return true
proc procBlkEpilogue(vmState: BaseVMState; dbTx: DbTransaction;
header: BlockHeader, body: BlockBody): bool
{.gcsafe, raises: [Defect,RlpError].} =
# Reward beneficiary
vmState.mutateStateDB:
if vmState.generateWitness:
db.collectWitnessData()
db.persist(ClearCache in vmState.flags)
let stateDb = vmState.accountDb
if header.stateRoot != stateDb.rootHash:
debug "wrong state root in block",
blockNumber = header.blockNumber,
expected = header.stateRoot,
actual = stateDb.rootHash,
arrivedFrom = vmState.chainDB.getCanonicalHead().stateRoot
return false
let bloom = createBloom(vmState.receipts)
if header.bloom != bloom:
debug "wrong bloom in block",
blockNumber = header.blockNumber
return false
let receiptRoot = calcReceiptRoot(vmState.receipts)
if header.receiptRoot != receiptRoot:
debug "wrong receiptRoot in block",
blockNumber = header.blockNumber,
actual = receiptRoot,
expected = header.receiptRoot
return false
return true
# ------------------------------------------------------------------------------
# Public functions
# ------------------------------------------------------------------------------
proc processBlock*(vmState: BaseVMState;
header: BlockHeader, body: BlockBody): ValidationResult
{.gcsafe, raises: [Defect,CatchableError].} =
## Processes `(header,body)` pair for a non-PoA network, only
if vmState.chainDB.config.poaEngine:
# PoA consensus engine unsupported, see the other version of
# processBlock() below
debug "Unsupported PoA request"
return ValidationResult.Error
var dbTx = vmState.chainDB.db.beginTransaction()
defer: dbTx.dispose()
if not vmState.procBlkPreamble(dbTx, header, body):
return ValidationResult.Error
vmState.calculateReward(header, body)
if not vmState.procBlkEpilogue(dbTx, header, body):
return ValidationResult.Error
# `applyDeletes = false`
# If the trie pruning activated, each of the block will have its own state
# trie keep intact, rather than destroyed by trie pruning. But the current
# block will still get a pruned trie. If trie pruning deactivated,
# `applyDeletes` have no effects.
dbTx.commit(applyDeletes = false)
proc processBlock*(vmState: BaseVMState; poa: Clique;
header: BlockHeader, body: BlockBody): ValidationResult
{.gcsafe, raises: [Defect,CatchableError].} =
## Generalised function to processes `(header,body)` pair for any network,
## regardless of PoA or not
# Process PoA state transition first so there is no need to re-wind on error.
if vmState.chainDB.config.poaEngine and
not poa.updatePoaState(header, body):
debug "PoA update failed"
return ValidationResult.Error
var dbTx = vmState.chainDB.db.beginTransaction()
defer: dbTx.dispose()
if not vmState.procBlkPreamble(dbTx, header, body):
return ValidationResult.Error
if not vmState.chainDB.config.poaEngine:
vmState.calculateReward(header, body)
if not vmState.procBlkEpilogue(dbTx, header, body):
return ValidationResult.Error
dbTx.commit(applyDeletes = false)
# ------------------------------------------------------------------------------
# End
# ------------------------------------------------------------------------------