Prototype an example fork subclass
This commit is contained in:
Alexander Ivanov
parent
84ccfc5966
commit
637b56fa4c
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@ -8,3 +8,4 @@ type
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Block* = ref object of RootObj
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header*: Header
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uncles*: CountableList[Header]
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blockNumber*: Int256
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@ -173,14 +173,14 @@ const
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GASLIMITADJUSTMENTFACTOR = 1024
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GASLIMITMINIMUM = 5000
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# GASLIMITMAXIMUM = 2 ^ 63 - 1
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GASLIMITUSAGEADJUSTMENTNUMERATOR = 3
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GASLIMITUSAGEADJUSTMENTDENOMINATOR = 2
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DIFFICULTYADJUSTMENTDENOMINATOR = 2048
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DIFFICULTYMINIMUM = 131072
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BOMBEXPONENTIALPERIOD = 100000
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# BOMBEXPONENTIALFREEPERIODS = 2
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# BLOCKREWARD = 5 * denoms.ether
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UNCLEDEPTHPENALTYFACTOR = 8
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GAS_LIMIT_USAGE_ADJUSTMENT_NUMERATOR* = 3.Int256
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GAS_LIMIT_USAGE_ADJUSTMENT_DENOMINATOR* = 2.Int256
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DIFFICULTY_ADJUSTMENT_DENOMINATOR* = 2_048.Int256
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DIFFICULTY_MINIMUM* = 131_072.Int256
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BOMB_EXPONENTIAL_PERIOD* = 100_000.Int256
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BOMB_EXPONENTIAL_FREE_PERIODS* = 2.Int256
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BLOCK_REWARD* = 5.Int256 * 2.Int256 # denoms.ether
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UNCLE_DEPTH_PENALTY_FACTOR* = 8.Int256
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MAXUNCLEDEPTH = 6
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MAXUNCLES = 2
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# SECPK1P = 2 ^ 256 - 2 ^ 32 - 977
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@ -192,8 +192,8 @@ const
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SECPK1G = (SECPK1Gx, SECPK1Gy)
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EMPTYUNCLEHASH = cstring"\x1d\xccM\xe8\xde\xc7]z\xab\x85\xb5g\xb6\xcc\xd4\x1a\xd3\x12E\x1b\x94\x8at\x13\xf0\xa1B\xfd@\xd4\x93G"
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GENESIS_BLOCK_NUMBER* = 0.Int256
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GENESIS_DIFFICULTY* = 131072.Int256
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GENESIS_GAS_LIMIT* = 3141592.Int256
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GENESIS_DIFFICULTY* = 131_072.Int256
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GENESIS_GAS_LIMIT* = 3_141_592.Int256
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GENESIS_PARENT_HASH* = ZERO_HASH32
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GENESIS_COINBASE* = ZERO_ADDRESS
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GENESIS_NONCE* = cstring"\x00\x00\x00\x00\x00\x00\x00B"
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@ -30,3 +30,7 @@ proc validate*(t: BaseTransaction) =
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if t.intrinsic_gas() > t.gas:
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raise newException(ValidationError, "Insufficient gas")
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# self.check_signature_validity()
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proc sender*(t: BaseTransaction): cstring =
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# TODO
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cstring""
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@ -1,5 +1,10 @@
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import ../constants
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type
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Header* = ref object
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timestamp*: int
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difficulty*: Int256
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blockNumber*: Int256
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# TODO
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proc generateHeaderFromParentHeader*(
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@ -35,3 +40,15 @@ proc generateHeaderFromParentHeader*(
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# )
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# return header
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proc computeGasLimit*(header: Header, gasLimitFloor: Int256): Int256 =
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# TODO
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gasLimitFloor
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proc gasUsed*(header: Header): Int256 =
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# TODO
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0.Int256
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proc gasLimit*(header: Header): Int256 =
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# TODO
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0.Int256
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@ -13,6 +13,16 @@ proc validateCanonicalAddress*(value: cstring, title: string = "Value") =
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proc validateGte*(value: Int256, minimum: int, title: string = "Value") =
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if value <= minimum.Int256:
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raise newException(ValidationError,
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fmt"{title} {value} is not greater than or equal to {minimum}")
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proc validateGt*(value: Int256, minimum: int, title: string = "Value") =
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if value < minimum.Int256:
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raise newException(ValidationError,
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fmt"{title} {value} is not greater than or equal to {minimum}")
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proc validateGt*(value: int, minimum: int, title: string = "Value") =
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if value < minimum:
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raise newException(ValidationError,
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fmt"{title} {value} is not greater than or equal to {minimum}")
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@ -1,5 +1,5 @@
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import
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../logging, ../constants, ../errors, ../transaction, ../computation, "../block", ../vm_state, ../db/chain, ../utils/db, ../utils/header
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../logging, ../constants, ../errors, ../transaction, ../computation, "../block", ../vm_state, ../vm_state_transactions, ../db/chain, ../utils/header
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type
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VM* = ref object of RootObj
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@ -11,38 +11,26 @@ type
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chainDB*: BaseChainDB
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isStateless*: bool
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state*: BaseVMState
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`block`*: Block
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proc newVM*(header: Header, chainDB: BaseChainDB): VM =
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new(result)
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result.chainDB = chainDB
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method name*(vm: VM): string =
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"VM"
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method addTransaction*(vm: var VM, transaction: BaseTransaction, computation: BaseComputation): Block =
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# Add a transaction to the given block and save the block data into chaindb
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var receipt = self.state.makeReceipt(transaction, computation)
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var transactionIdx = len(vm.`block`.transactions)
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# var receipt = vm.state.makeReceipt(transaction, computation)
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# var transactionIdx = len(vm.`block`.transactions)
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# TODO
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return Block()
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# var indexKey = rlp.encode(transaction_idx, sedes=rlp.sedes.big_endian_int)
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# self.block.transactions.append(transaction)
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# tx_root_hash = self.chaindb.add_transaction(self.block.header, index_key, transaction)
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# receipt_root_hash = self.chaindb.add_receipt(self.block.header, index_key, receipt)
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# self.block.bloom_filter |= receipt.bloom
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# self.block.header.transaction_root = tx_root_hash
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# self.block.header.receipt_root = receipt_root_hash
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# self.block.header.bloom = int(self.block.bloom_filter)
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# self.block.header.gas_used = receipt.gas_used
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# return self.block
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method applyTransaction*(vm: var VM, transaction: BaseTransaction): (BaseComputation, Block) =
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# Apply the transaction to the vm in the current block
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if vm.isStateless:
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var (computation, b, trieData) = vm.state.applyTransaction(
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vm.state,
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transaction,
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vm.`block`,
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isStateless=true)
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@ -51,11 +39,10 @@ method applyTransaction*(vm: var VM, transaction: BaseTransaction): (BaseComputa
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# Persist changed transaction and receipt key-values to self.chaindb.
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else:
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var (computation, _, _) = vm.state.applyTransaction(
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vm.state,
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transaction,
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vm.`block`,
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isStateless=false)
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vm.addTransaction(transaction, computation)
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discard vm.addTransaction(transaction, computation)
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result = (computation, vm.`block`)
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@ -0,0 +1,54 @@
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import
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logging, constants, errors, transaction, "block", utils/header
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type
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FrontierBlock* = object of Block
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# bloomFilter*: BloomFilter
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# header*: BlockHeader
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transactions*: seq[BaseTransaction]
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# transactionClass*: Any
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stateRoot*: cstring
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# fields*: seq[(string, Function)]
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# cachedRlp: cstring
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# uncles*: void
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# import
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# rlp, rlp.sedes, eth_bloom, evm.constants, evm.rlp.receipts, evm.rlp.blocks,
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# evm.rlp.headers, evm.utils.keccak, transactions
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# method makeFrontierBlock*(header: auto; transactions: auto; uncles: void): auto =
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# if transactions is None:
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# transactions = @[]
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# if uncles is None:
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# uncles = @[]
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# result.bloomFilter = BloomFilter(header.bloom)
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# super(FrontierBlock, result).__init__()
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# method number*(self: FrontierBlock): int =
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# return self.header.blockNumber
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# method hash*(self: FrontierBlock): cstring =
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# return self.header.hash
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# method getTransactionClass*(cls: typedesc): typedesc =
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# return cls.transactionClass
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# method getReceipts*(self: FrontierBlock; chaindb: BaseChainDB): seq[Receipt] =
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# return chaindb.getReceipts(self.header, Receipt)
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# method fromHeader*(cls: typedesc; header: BlockHeader; chaindb: BaseChainDB): FrontierBlock =
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# ## Returns the block denoted by the given block header.
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# if header.unclesHash == EMPTYUNCLEHASH:
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# var uncles = @[]
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# else:
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# uncles = chaindb.getBlockUncles(header.unclesHash)
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# var transactions = chaindb.getBlockTransactions(header, cls.getTransactionClass())
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# return cls()
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# proc makeFrontierBlock*(): FrontierBlock =
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# result.transactionClass = FrontierTransaction
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# result.fields = @[("header", BlockHeader),
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# ("transactions", CountableList(transactionClass)),
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# ("uncles", CountableList(BlockHeader))]
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# result.bloomFilter = nil
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@ -0,0 +1,21 @@
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import
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logging, constants, errors, validation, utils/header, vm / forks / frontier / vm
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method computeDifficulty*(parentHeader: Header, timestamp: int): Int256 =
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validateGt(timestamp, parentHeader.timestamp, title="Header timestamp")
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let offset = parentHeader.difficulty div DIFFICULTY_ADJUSTMENT_DENOMINATOR
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# We set the minimum to the lowest of the protocol minimum and the parent
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# minimum to allow for the initial frontier *warming* period during which
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# the difficulty begins lower than the protocol minimum
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let difficultyMinimum = min(parentHeader.difficulty, DIFFICULTY_MINIMUM)
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# let test = (timestamp - parentHeader.timestamp).Int256 < FRONTIER_DIFFICULTY_ADJUSTMENT_CUTOFF
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# let baseDifficulty = max(parent.Header.difficulty + (if test: offset else: -offset), difficultyMinimum)
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# # Adjust for difficulty bomb
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# let numBombPeriods = ((parentHeader.blockNumber + 1) div BOMB_EXPONENTIAL_PERIOD) - BOMB_EXPONENTIAL_FREE_PERIODS
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# result = if numBombPeriods >= 0: max(baseDifficulty + 2.Int256 ^ numBombPeriods, DIFFICULTY_MINIMUM) else: baseDifficulty
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result = 0.Int256
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method createHeaderFromParent*(parentHeader: Header): Header =
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# TODO
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result = Header()
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@ -0,0 +1,24 @@
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import
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strformat,
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constants, errors, vm_state, transaction, utils/header
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proc validateFrontierTransaction*(vmState: BaseVmState, transaction: BaseTransaction) =
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let gasCost = transaction.gas * transaction.gasPrice
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var senderBalance: Int256
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# inDB(vmState.stateDB(readOnly=true):
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# senderBalance = db.getBalance(transaction.sender)
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senderBalance = gasCost # TODO
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if senderBalance < gasCost:
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raise newException(ValidationError, %"Sender account balance cannot afford txn gas: {transaction.sender}")
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let totalCost = transaction.value + gasCost
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if senderBalance < totalCost:
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raise newException(ValidationError, "Sender account balance cannot afford txn")
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if vmState.blockHeader.gasUsed + transaction.gas > vmState.blockHeader.gasLimit:
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raise newException(ValidationError, "Transaction exceeds gas limit")
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# inDB(vmState.stateDb(readOnly=true):
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# if db.getNonce(transaction.sender) != transaction.nonce:
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# raise newException(ValidationError, "Invalid transaction nonce")
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@ -0,0 +1,155 @@
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import
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logging, constants, errors, vm_state, utils/header, db/chain
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type
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FrontierVMState* = object of BaseVMState
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# receipts*:
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# computationClass*: Any
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# accessLogs*: AccessLogs
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# import
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# py2nim_helpers, __future__, rlp, evm, evm.constants, evm.exceptions, evm.rlp.logs,
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# evm.rlp.receipts, evm.vm.message, evm.vm_state, evm.utils.address,
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# evm.utils.hexadecimal, evm.utils.keccak, evm.validation, computation, constants,
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# validation
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# type
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# FrontierVMState* = object of Function
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# prevHeaders*: seq[BlockHeader]
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# receipts*: void
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# computationClass*: Any
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# _chaindb*: BaseChainDB
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# accessLogs*: AccessLogs
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# blockHeader*: BlockHeader
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# proc _executeFrontierTransaction*(vmState: FrontierVMState;
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# transaction: FrontierTransaction): FrontierComputation =
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# transaction.validate()
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# validateFrontierTransaction(vmState, transaction)
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# var gasFee = transaction.gas * transaction.gasPrice
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# with vmState.stateDb(),
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# stateDb.deltaBalance(transaction.sender, -1 * gasFee)
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# stateDb.incrementNonce(transaction.sender)
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# var messageGas = transaction.gas - transaction.intrinsicGas
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# if transaction.to == constants.CREATECONTRACTADDRESS:
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# var
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# contractAddress = generateContractAddress(transaction.sender,
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# stateDb.getNonce(transaction.sender) - 1)
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# data = cstring""
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# code = transaction.data
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# else:
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# contractAddress = None
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# data = transaction.data
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# code = stateDb.getCode(transaction.to)
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# vmState.logger.info("TRANSACTION: sender: %s | to: %s | value: %s | gas: %s | gas-price: %s | s: %s | r: %s | v: %s | data-hash: %s",
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# encodeHex(transaction.sender), encodeHex(transaction.to),
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# transaction.value, transaction.gas, transaction.gasPrice,
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# transaction.s, transaction.r, transaction.v,
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# encodeHex(keccak(transaction.data)))
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# var message = Message()
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# if message.isCreate:
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# with vmState.stateDb(),
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# var isCollision = stateDb.accountHasCodeOrNonce(contractAddress)
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# if isCollision:
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# var computation = vmState.getComputation(message)
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# computation._error = ContractCreationCollision("Address collision while creating contract: {0}".format(
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# encodeHex(contractAddress)))
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# vmState.logger.debug("Address collision while creating contract: %s",
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# encodeHex(contractAddress))
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# else:
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# computation = vmState.getComputation(message).applyCreateMessage()
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# else:
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# computation = vmState.getComputation(message).applyMessage()
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# var numDeletions = len(computation.getAccountsForDeletion())
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# if numDeletions:
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# computation.gasMeter.refundGas(REFUNDSELFDESTRUCT * numDeletions)
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# var
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# gasRemaining = computation.getGasRemaining()
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# gasRefunded = computation.getGasRefund()
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# gasUsed = transaction.gas - gasRemaining
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# gasRefund = min(gasRefunded, gasUsed div 2)
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# gasRefundAmount = gasRefund + gasRemaining * transaction.gasPrice
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# if gasRefundAmount:
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# vmState.logger.debug("TRANSACTION REFUND: %s -> %s", gasRefundAmount,
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# encodeHex(message.sender))
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# with vmState.stateDb(),
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# stateDb.deltaBalance(message.sender, gasRefundAmount)
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# var transactionFee = transaction.gas - gasRemaining - gasRefund *
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# transaction.gasPrice
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# vmState.logger.debug("TRANSACTION FEE: %s -> %s", transactionFee,
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# encodeHex(vmState.coinbase))
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# with vmState.stateDb(),
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# stateDb.deltaBalance(vmState.coinbase, transactionFee)
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# with vmState.stateDb(),
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# for account, beneficiary in computation.getAccountsForDeletion():
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# vmState.logger.debug("DELETING ACCOUNT: %s", encodeHex(account))
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# stateDb.setBalance(account, 0)
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# stateDb.deleteAccount(account)
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# return computation
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# proc _makeFrontierReceipt*(vmState: FrontierVMState;
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# transaction: FrontierTransaction;
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# computation: FrontierComputation): Receipt =
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# var
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# logs = ## py2nim can't generate code for
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# ## Log(address, topics, data)
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# gasRemaining = computation.getGasRemaining()
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# gasRefund = computation.getGasRefund()
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# txGasUsed = transaction.gas - gasRemaining -
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# min(gasRefund, transaction.gas - gasRemaining div 2)
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# gasUsed = vmState.blockHeader.gasUsed + txGasUsed
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# receipt = Receipt()
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# return receipt
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# method executeTransaction*(self: FrontierVMState; transaction: FrontierTransaction): (
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# , ) =
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# var computation = _executeFrontierTransaction(self, transaction)
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# return (computation, self.blockHeader)
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# method makeReceipt*(self: FrontierVMState; transaction: FrontierTransaction;
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# computation: FrontierComputation): Receipt =
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# var receipt = _makeFrontierReceipt(self, transaction, computation)
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# return receipt
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# method validateBlock*(self: FrontierVMState; block: FrontierBlock): void =
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# if notblock.isGenesis:
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# var parentHeader = self.parentHeader
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# self._validateGasLimit(block)
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# validateLengthLte(block.header.extraData, 32)
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# if block.header.timestamp < parentHeader.timestamp:
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# raise newException(ValidationError, "`timestamp` is before the parent block\'s timestamp.\\n- block : {0}\\n- parent : {1}. ".format(
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# block.header.timestamp, parentHeader.timestamp))
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# elif block.header.timestamp == parentHeader.timestamp:
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# raise ValidationError("`timestamp` is equal to the parent block\'s timestamp\\n- block : {0}\\n- parent: {1}. ".format(
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# block.header.timestamp, parentHeader.timestamp))
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# if len(block.uncles) > MAXUNCLES:
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# raise newException(ValidationError, "Blocks may have a maximum of {0} uncles. Found {1}.".format(
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# MAXUNCLES, len(block.uncles)))
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# for uncle in block.uncles:
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# self.validateUncle(block, uncle)
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# if notself.isKeyExists(block.header.stateRoot):
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# raise newException(ValidationError, "`state_root` was not found in the db.\\n- state_root: {0}".format(
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# block.header.stateRoot))
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# var localUncleHash = keccak(rlp.encode(block.uncles))
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# if localUncleHash != block.header.unclesHash:
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# raise newException(ValidationError, "`uncles_hash` and block `uncles` do not match.\\n - num_uncles : {0}\\n - block uncle_hash : {1}\\n - header uncle_hash: {2}".format(
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# len(block.uncles), localUncleHash, block.header.uncleHash))
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# method _validateGasLimit*(self: FrontierVMState; block: FrontierBlock): void =
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# var gasLimit = block.header.gasLimit
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# if gasLimit < GASLIMITMINIMUM:
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# raise newException(ValidationError, "Gas limit {0} is below minimum {1}".format(
|
||||
# gasLimit, GASLIMITMINIMUM))
|
||||
# if gasLimit > GASLIMITMAXIMUM:
|
||||
# raise newException(ValidationError, "Gas limit {0} is above maximum {1}".format(
|
||||
# gasLimit, GASLIMITMAXIMUM))
|
||||
# var
|
||||
# parentGasLimit = self.parentHeader.gasLimit
|
||||
# diff = gasLimit - parentGasLimit
|
||||
# if diff > parentGasLimit // GASLIMITADJUSTMENTFACTOR:
|
||||
# raise newException(ValidationError, "Gas limit {0} difference to parent {1} is too big {2}".format(
|
||||
# gasLimit, parentGasLimit, diff))
|
||||
|
||||
# proc makeFrontierVMState*(): FrontierVMState =
|
||||
# result.computationClass = FrontierComputation
|
||||
|
||||
|
|
@ -0,0 +1 @@
|
|||
p:"../../../"
|
||||
|
|
@ -0,0 +1,25 @@
|
|||
import
|
||||
logging, constants, errors, "block", vm / [base, stack], db / chain, utils / header,
|
||||
frontier_block, frontier_vm_state, frontier_validation
|
||||
|
||||
|
||||
type
|
||||
FrontierVM* = ref object of VM
|
||||
|
||||
method name*(vm: FrontierVM): string =
|
||||
"FrontierVM"
|
||||
|
||||
method getBlockReward(vm: FrontierVM): Int256 =
|
||||
BLOCK_REWARD
|
||||
|
||||
method getetUncleReward(vm: FrontierVM, blockNumber: Int256, uncle: Block): Int256 =
|
||||
BLOCK_REWARD * (UNCLE_DEPTH_PENALTY_FACTOR + uncle.blockNumber - blockNumber) div UNCLE_DEPTH_PENALTY_FACTOR
|
||||
|
||||
|
||||
method getNephewReward(vm: FrontierVM): Int256 =
|
||||
vm.getBlockReward() div 32
|
||||
|
||||
proc newFrontierVM*(header: Header, chainDB: BaseChainDB): FrontierVM =
|
||||
new(result)
|
||||
result.chainDB = chainDB
|
||||
result.isStateless = true
|
||||
Loading…
Reference in New Issue