ethereum.tangerine_whistle.vm
Ethereum Virtual Machine (EVM) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
.. contents:: Table of Contents :backlinks: none :local:
Introduction
The abstract computer which runs the code stored in an
.fork_types.Account
.
__all__
28 | __all__ = ("Environment", "Evm", "Message") |
---|
Environment
Items external to the virtual machine itself, provided by the environment.
31 | @dataclass |
---|
class Environment:
caller
37 | caller: Address |
---|
block_hashes
38 | block_hashes: List[Hash32] |
---|
origin
39 | origin: Address |
---|
coinbase
40 | coinbase: Address |
---|
number
41 | number: Uint |
---|
gas_limit
42 | gas_limit: Uint |
---|
gas_price
43 | gas_price: Uint |
---|
time
44 | time: U256 |
---|
difficulty
45 | difficulty: Uint |
---|
state
46 | state: State |
---|
traces
47 | traces: List[dict] |
---|
Message
Items that are used by contract creation or message call.
50 | @dataclass |
---|
class Message:
caller
56 | caller: Address |
---|
target
57 | target: Union[Bytes0, Address] |
---|
current_target
58 | current_target: Address |
---|
gas
59 | gas: Uint |
---|
value
60 | value: U256 |
---|
data
61 | data: Bytes |
---|
code_address
62 | code_address: Optional[Address] |
---|
code
63 | code: Bytes |
---|
depth
64 | depth: Uint |
---|
should_transfer_value
65 | should_transfer_value: bool |
---|
parent_evm
66 | parent_evm: Optional["Evm"] |
---|
Evm
The internal state of the virtual machine.
69 | @dataclass |
---|
class Evm:
pc
73 | pc: Uint |
---|
stack
74 | stack: List[U256] |
---|
memory
75 | memory: bytearray |
---|
code
76 | code: Bytes |
---|
gas_left
77 | gas_left: Uint |
---|
env
78 | env: Environment |
---|
valid_jump_destinations
79 | valid_jump_destinations: Set[Uint] |
---|
logs
80 | logs: Tuple[Log, ...] |
---|
refund_counter
81 | refund_counter: int |
---|
running
82 | running: bool |
---|
message
83 | message: Message |
---|
output
84 | output: Bytes |
---|
accounts_to_delete
85 | accounts_to_delete: Set[Address] |
---|
error
86 | error: Optional[Exception] |
---|
incorporate_child_on_success
Incorporate the state of a successful child_evm
into the parent evm
.
Parameters
evm :
The parent EVM
.
child_evm :
The child evm to incorporate.
def incorporate_child_on_success(evm: Evm, child_evm: Evm) -> None:
90 | """ |
---|---|
91 | Incorporate the state of a successful `child_evm` into the parent `evm`. |
92 |
|
93 | Parameters |
94 | ---------- |
95 | evm : |
96 | The parent `EVM`. |
97 | child_evm : |
98 | The child evm to incorporate. |
99 | """ |
100 | evm.gas_left += child_evm.gas_left |
101 | evm.logs += child_evm.logs |
102 | evm.refund_counter += child_evm.refund_counter |
103 | evm.accounts_to_delete.update(child_evm.accounts_to_delete) |
incorporate_child_on_error
Incorporate the state of an unsuccessful child_evm
into the parent evm
.
Parameters
evm :
The parent EVM
.
child_evm :
The child evm to incorporate.
def incorporate_child_on_error(evm: Evm, child_evm: Evm) -> None:
107 | """ |
---|---|
108 | Incorporate the state of an unsuccessful `child_evm` into the parent `evm`. |
109 |
|
110 | Parameters |
111 | ---------- |
112 | evm : |
113 | The parent `EVM`. |
114 | child_evm : |
115 | The child evm to incorporate. |
116 | """ |
117 | evm.gas_left += child_evm.gas_left |