nimbus-eth1/nimbus/p2p/chain.nim

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import ../db/db_chain, eth/common, chronicles, ../vm_state, ../vm_types,
../vm/[computation, message], ../vm/interpreter/vm_forks, stint, nimcrypto,
../utils, eth/trie/db, ./executor, ../config, ../genesis, ../utils,
stew/endians2
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when not defined(release):
import ../tracer
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type
# Chain's forks not always equals to EVM's forks
ChainFork = enum
Frontier,
Homestead,
DAOFork,
Tangerine,
Spurious,
Byzantium,
Constantinople,
Petersburg,
Istanbul,
MuirGlacier
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Chain* = ref object of AbstractChainDB
db: BaseChainDB
forkIds: array[ChainFork, ForkID]
blockZeroHash: KeccakHash
func toChainFork(c: ChainConfig, number: BlockNumber): ChainFork =
if number >= c.muirGlacierBlock: MuirGlacier
elif number >= c.istanbulBlock: Istanbul
elif number >= c.petersburgBlock: Petersburg
elif number >= c.constantinopleBlock: Constantinople
elif number >= c.byzantiumBlock: Byzantium
elif number >= c.eip158Block: Spurious
elif number >= c.eip150Block: Tangerine
elif number >= c.daoForkBlock: DAOFork
elif number >= c.homesteadBlock: Homestead
else: Frontier
func toNextFork(n: BlockNumber): uint64 =
if n == high(BlockNumber):
result = 0'u64
else:
result = n.truncate(uint64)
func getNextFork(c: ChainConfig, fork: ChainFork): uint64 =
let next: array[ChainFork, uint64] = [
0'u64,
toNextFork(c.homesteadBlock),
toNextFork(c.daoForkBlock),
toNextFork(c.eip150Block),
toNextFork(c.eip158Block),
toNextFork(c.byzantiumBlock),
toNextFork(c.constantinopleBlock),
toNextFork(c.petersburgBlock),
toNextFork(c.istanbulBlock),
toNextFork(c.muirGlacierBlock),
]
if fork == high(ChainFork):
result = 0
return
result = next[fork]
for x in fork..high(ChainFork):
if result != next[x]:
result = next[x]
break
func calculateForkId(c: ChainConfig, fork: ChainFork, prevCRC: uint32, prevFork: uint64): ForkID =
result.nextFork = c.getNextFork(fork)
if result.nextFork != prevFork:
result.crc = crc32(prevCRC, toBytesBE(prevFork))
else:
result.crc = prevCRC
func calculateForkIds(c: ChainConfig, genesisCRC: uint32): array[ChainFork, ForkID] =
var prevCRC = genesisCRC
var prevFork = c.getNextFork(Frontier)
for fork in ChainFork:
result[fork] = calculateForkId(c, fork, prevCRC, prevFork)
prevFork = result[fork].nextFork
prevCRC = result[fork].crc
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proc newChain*(db: BaseChainDB): Chain =
result.new
result.db = db
if not db.config.daoForkSupport:
db.config.daoForkBlock = db.config.homesteadBlock
let chainId = PublicNetwork(db.config.chainId)
let g = defaultGenesisBlockForNetwork(chainId)
result.blockZeroHash = g.toBlock.blockHash
let genesisCRC = crc32(0, result.blockZeroHash.data)
result.forkIds = calculateForkIds(db.config, genesisCRC)
method genesisHash*(c: Chain): KeccakHash {.gcsafe.} =
c.blockZeroHash
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method getBlockHeader*(c: Chain, b: HashOrNum, output: var BlockHeader): bool {.gcsafe.} =
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case b.isHash
of true:
c.db.getBlockHeader(b.hash, output)
else:
c.db.getBlockHeader(b.number, output)
method getBestBlockHeader*(c: Chain): BlockHeader {.gcsafe.} =
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c.db.getCanonicalHead()
method getSuccessorHeader*(c: Chain, h: BlockHeader, output: var BlockHeader, skip = 0'u): bool {.gcsafe.} =
let offset = 1 + skip.toBlockNumber
if h.blockNumber <= (not 0.toBlockNumber) - offset:
result = c.db.getBlockHeader(h.blockNumber + offset, output)
method getAncestorHeader*(c: Chain, h: BlockHeader, output: var BlockHeader, skip = 0'u): bool {.gcsafe.} =
let offset = 1 + skip.toBlockNumber
if h.blockNumber >= offset:
result = c.db.getBlockHeader(h.blockNumber - offset, output)
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method getBlockBody*(c: Chain, blockHash: KeccakHash): BlockBodyRef =
result = nil
method persistBlocks*(c: Chain, headers: openarray[BlockHeader], bodies: openarray[BlockBody]): ValidationResult {.gcsafe.} =
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# Run the VM here
if headers.len != bodies.len:
debug "Number of headers not matching number of bodies"
return ValidationResult.Error
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c.db.highestBlock = headers[^1].blockNumber
let transaction = c.db.db.beginTransaction()
defer: transaction.dispose()
trace "Persisting blocks", fromBlock = headers[0].blockNumber, toBlock = headers[^1].blockNumber
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for i in 0 ..< headers.len:
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let head = c.db.getCanonicalHead()
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let vmState = newBaseVMState(head.stateRoot, headers[i], c.db)
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let validationResult = processBlock(c.db, headers[i], bodies[i], vmState)
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when not defined(release):
if validationResult == ValidationResult.Error and
bodies[i].transactions.calcTxRoot == headers[i].txRoot:
dumpDebuggingMetaData(c.db, headers[i], bodies[i], vmState)
warn "Validation error. Debugging metadata dumped."
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if validationResult != ValidationResult.OK:
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return validationResult
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discard c.db.persistHeaderToDb(headers[i])
if c.db.getCanonicalHead().blockHash != headers[i].blockHash:
debug "Stored block header hash doesn't match declared hash"
return ValidationResult.Error
discard c.db.persistTransactions(headers[i].blockNumber, bodies[i].transactions)
discard c.db.persistReceipts(vmState.receipts)
# update currentBlock *after* we persist it
# so the rpc return consistent result
# between eth_blockNumber and eth_syncing
c.db.currentBlock = headers[i].blockNumber
transaction.commit()
method getTrieDB*(c: Chain): TrieDatabaseRef {.gcsafe.} =
c.db.db
method getForkId*(c: Chain, n: BlockNumber): ForkID {.gcsafe.} =
# EIP 2364/2124
let fork = c.db.config.toChainFork(n)
c.forkIds[fork]