nimbus-eth1/tests/test_generalstate_json.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 http://www.apache.org/licenses/LICENSE-2.0)
# * MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)
# at your option. This file may not be copied, modified, or distributed except according to those terms.
import
unittest, strformat, strutils, tables, json, ospaths, times,
byteutils, ranges/typedranges, nimcrypto/[keccak, hash],
rlp, eth_trie/db, eth_common,
eth_keys,
./test_helpers,
../nimbus/[constants, errors],
../nimbus/[vm_state, vm_types, vm_state_transactions],
../nimbus/utils/[header, addresses],
../nimbus/vm/interpreter,
../nimbus/db/[db_chain, state_db]
proc testFixture(fixtures: JsonNode, testStatusIMPL: var TestStatus)
suite "generalstate json tests":
jsonTest("GeneralStateTests", testFixture)
proc testFixtureIndexes(header: BlockHeader, pre: JsonNode, transaction: Transaction, sender: EthAddress, expectedHash: string) =
var vmState = newBaseVMState(header, newBaseChainDB(newMemoryDb()))
vmState.mutateStateDB:
setupStateDB(pre, db)
defer:
#echo vmState.readOnlyStateDB.dumpAccount("c94f5374fce5edbc8e2a8697c15331677e6ebf0b")
doAssert "0x" & `$`(vmState.readOnlyStateDB.rootHash).toLowerAscii == expectedHash
if not validateTransaction(vmState, transaction, sender):
vmState.mutateStateDB:
# pre-EIP158 (e.g., Byzantium) should ensure currentCoinbase exists
# in later forks, don't create at all
db.addBalance(header.coinbase, 0.u256)
return
# TODO: replace with cachingDb or similar approach; necessary
# when calls/subcalls/etc come in, too.
var readOnly = vmState.readOnlyStateDB
let storageRoot = readOnly.getStorageRoot(transaction.to)
let gas_cost = transaction.gasLimit.u256 * transaction.gasPrice.u256
vmState.mutateStateDB:
db.setNonce(sender, db.getNonce(sender) + 1)
db.subBalance(sender, transaction.value + gas_cost)
if transaction.isContractCreation and transaction.payload.len > 0:
vmState.mutateStateDB:
# TODO: move into applyCreateTransaction
# fixtures/GeneralStateTests/stTransactionTest/TransactionSendingToZero.json
# fixtures/GeneralStateTests/stTransactionTest/TransactionSendingToEmpty.json
#db.addBalance(generateAddress(sender, transaction.accountNonce), transaction.value)
let createGasUsed = applyCreateTransaction(db, transaction, header, vmState, sender, true)
db.addBalance(header.coinbase, createGasUsed)
return
var computation = setupComputation(header, vmState, transaction, sender)
vmState.mutateStateDB:
# contract creation transaction.to == 0, so ensure happens after
db.addBalance(transaction.to, transaction.value)
# What remains is call and/or value transfer
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if execComputation(computation):
let
gasRemaining = computation.gasMeter.gasRemaining.u256
gasRefunded = computation.gasMeter.gasRefunded.u256
gasUsed = transaction.gasLimit.u256 - gasRemaining
gasRefund = min(gasRefunded, gasUsed div 2)
gasRefundAmount = (gasRefund + gasRemaining) * transaction.gasPrice.u256
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vmState.mutateStateDB:
# TODO if the balance/etc calls were gated on gAFD or similar,
# that would simplify/combine codepaths
if header.coinbase notin computation.getAccountsForDeletion:
db.subBalance(header.coinbase, gasRefundAmount)
db.addBalance(header.coinbase, gas_cost)
db.addBalance(sender, gasRefundAmount)
# TODO: only here does one commit, with some nuance/caveat
else:
vmState.mutateStateDB:
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# XXX: the coinbase has to be committed; the rest are basically reverts
db.subBalance(transaction.to, transaction.value)
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db.addBalance(sender, transaction.value)
db.setStorageRoot(transaction.to, storageRoot)
db.addBalance(header.coinbase, gas_cost)
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proc testFixture(fixtures: JsonNode, testStatusIMPL: var TestStatus) =
var fixture: JsonNode
for label, child in fixtures:
fixture = child
break
let fenv = fixture["env"]
var emptyRlpHash = keccak256.digest(rlp.encode(""))
let header = BlockHeader(
coinbase: fenv["currentCoinbase"].getStr.ethAddressFromHex,
difficulty: fromHex(UInt256, fenv{"currentDifficulty"}.getStr),
blockNumber: fenv{"currentNumber"}.getHexadecimalInt.u256,
gasLimit: fenv{"currentGasLimit"}.getHexadecimalInt.GasInt,
timestamp: fenv{"currentTimestamp"}.getHexadecimalInt.int64.fromUnix,
stateRoot: emptyRlpHash
)
let ftrans = fixture["transaction"]
for expectation in fixture["post"]["Homestead"]:
let
expectedHash = expectation["hash"].getStr
indexes = expectation["indexes"]
dataIndex = indexes["data"].getInt
gasIndex = indexes["gas"].getInt
valueIndex = indexes["value"].getInt
let transaction = ftrans.getFixtureTransaction(dataIndex, gasIndex, valueIndex)
let sender = ftrans.getFixtureTransactionSender
testFixtureIndexes(header, fixture["pre"], transaction, sender, expectedHash)