80 lines
2.5 KiB
Nim
80 lines
2.5 KiB
Nim
# Nimbus
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# Copyright (c) 2018 Status Research & Development GmbH
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# Licensed under either of
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# * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
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# http://www.apache.org/licenses/LICENSE-2.0)
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# * MIT license ([LICENSE-MIT](LICENSE-MIT) or
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# http://opensource.org/licenses/MIT)
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# at your option. This file may not be copied, modified, or distributed except
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# according to those terms.
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## EVM Opcode Handlers: Common Helper Functions
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## ============================================
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##
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when defined(evmc_enabled):
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{.push raises: [CatchableError].} # basically the annotation type of a `Vm2OpFn`
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else:
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{.push raises: [].}
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import
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../../../errors,
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../../types,
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../gas_costs,
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eth/common,
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eth/common/eth_types,
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stint
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when defined(evmc_enabled):
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import ../../evmc_api, evmc/evmc
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else:
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import
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../../state,
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../../../db/accounts_cache
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# ------------------------------------------------------------------------------
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# Public
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# ------------------------------------------------------------------------------
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proc gasEip2929AccountCheck*(c: Computation; address: EthAddress): GasInt =
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when defined(evmc_enabled):
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result = if c.host.accessAccount(address) == EVMC_ACCESS_COLD:
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ColdAccountAccessCost
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else:
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WarmStorageReadCost
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else:
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c.vmState.mutateStateDB:
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result = if not db.inAccessList(address):
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db.accessList(address)
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ColdAccountAccessCost
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else:
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WarmStorageReadCost
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proc gasEip2929AccountCheck*(c: Computation; address: EthAddress, slot: UInt256): GasInt =
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when defined(evmc_enabled):
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result = if c.host.accessStorage(address, slot) == EVMC_ACCESS_COLD:
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ColdSloadCost
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else:
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WarmStorageReadCost
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else:
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c.vmState.mutateStateDB:
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result = if not db.inAccessList(address, slot):
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db.accessList(address, slot)
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ColdSloadCost
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else:
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WarmStorageReadCost
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template checkInStaticContext*(c: Computation) =
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## Verify static context in handler function, raise an error otherwise
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if EVMC_STATIC in c.msg.flags:
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# TODO: if possible, this check only appear
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# when fork >= FkByzantium
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raise newException(
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StaticContextError,
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"Cannot modify state while inside of STATICCALL context")
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# ------------------------------------------------------------------------------
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# End
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# ------------------------------------------------------------------------------
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