43 lines
1.5 KiB
Nim
43 lines
1.5 KiB
Nim
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import
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tables,
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constants, vm_state,
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opcode_values, ttmath,
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vm / [code_stream, gas_meter, memory, message, stack]
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type
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BaseComputation* = ref object of RootObj
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# The execution computation
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vmState*: BaseVMState
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msg*: Message
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memory*: Memory
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stack*: Stack
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gasMeter*: GasMeter
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code*: CodeStream
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children*: seq[BaseComputation]
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rawOutput*: string
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returnData*: string
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error*: Error
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logEntries*: seq[(string, seq[UInt256], string)]
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shouldEraseReturnData*: bool
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accountsToDelete*: Table[string, string]
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opcodes*: Table[Op, Opcode] # TODO array[Op, Opcode]
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precompiles*: Table[string, Opcode]
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Error* = ref object
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info*: string
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burnsGas*: bool
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erasesReturnData*: bool
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Opcode* = ref object of RootObj
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kind*: Op
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#of VARIABLE_GAS_COST_OPS:
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# gasCostHandler*: proc(computation: var BaseComputation): UInt256
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## so, we could have special logic that separates all gas cost calculations
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## from actual opcode execution
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## that's what parity does:
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## it uses the peek methods of the stack and calculates the cost
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## then it actually pops/pushes stuff in exec
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## I followed the py-evm approach which does that in opcode logic
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gasCostConstant*: UInt256
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runLogic*: proc(computation: var BaseComputation)
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