nimbus-eth1/nimbus/evm/interpreter/op_handlers/oph_helpers.nim

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2.5 KiB
Nim

# 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.
## EVM Opcode Handlers: Common Helper Functions
## ============================================
##
when defined(evmc_enabled):
{.push raises: [CatchableError].} # basically the annotation type of a `Vm2OpFn`
else:
{.push raises: [].}
import
../../../errors,
../../types,
../gas_costs,
eth/common,
eth/common/eth_types,
stint
when defined(evmc_enabled):
import ../../evmc_api, evmc/evmc
else:
import
../../state,
../../../db/accounts_cache
# ------------------------------------------------------------------------------
# Public
# ------------------------------------------------------------------------------
proc gasEip2929AccountCheck*(c: Computation; address: EthAddress): GasInt =
when defined(evmc_enabled):
result = if c.host.accessAccount(address) == EVMC_ACCESS_COLD:
ColdAccountAccessCost
else:
WarmStorageReadCost
else:
c.vmState.mutateStateDB:
result = if not db.inAccessList(address):
db.accessList(address)
ColdAccountAccessCost
else:
WarmStorageReadCost
proc gasEip2929AccountCheck*(c: Computation; address: EthAddress, slot: UInt256): GasInt =
when defined(evmc_enabled):
result = if c.host.accessStorage(address, slot) == EVMC_ACCESS_COLD:
ColdSloadCost
else:
WarmStorageReadCost
else:
c.vmState.mutateStateDB:
result = if not db.inAccessList(address, slot):
db.accessList(address, slot)
ColdSloadCost
else:
WarmStorageReadCost
template checkInStaticContext*(c: Computation) =
## Verify static context in handler function, raise an error otherwise
if EVMC_STATIC in c.msg.flags:
# TODO: if possible, this check only appear
# when fork >= FkByzantium
raise newException(
StaticContextError,
"Cannot modify state while inside of STATICCALL context")
# ------------------------------------------------------------------------------
# End
# ------------------------------------------------------------------------------