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fbfc1611d7
* Implement EIP-7702 part 1: Behavior * Implement EIP-7702 part 2: Tx validation * Implement EIP-7702 part 3: Delegation Designation and Gas Costs
90 lines
2.7 KiB
Nim
90 lines
2.7 KiB
Nim
# Nimbus
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# Copyright (c) 2021-2024 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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{.push raises: [].}
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import
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../../../core/eip7702,
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../../evm_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
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../../evmc_api,
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../../code_bytes,
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evmc/evmc
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else:
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import
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../../state,
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../../../db/ledger
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# ------------------------------------------------------------------------------
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# Public
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# ------------------------------------------------------------------------------
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proc gasEip2929AccountCheck*(c: Computation; address: Address): 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: Address, 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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func checkInStaticContext*(c: Computation): EvmResultVoid =
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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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return err(opErr(StaticContext))
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ok()
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proc gasEip7702CodeCheck*(c: Computation; address: Address): GasInt =
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let code = when defined(evmc_enabled):
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CodeBytesRef.init(c.host.copyCode(address))
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else:
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c.vmState.readOnlyStateDB.getCode(address)
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let delegateTo = parseDelegationAddress(code).valueOr:
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return 0
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c.gasEip2929AccountCheck(delegateTo)
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# ------------------------------------------------------------------------------
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# End
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# ------------------------------------------------------------------------------
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