ethereum.prague.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__
| 31 | __all__ = ("Environment", "Evm", "Message") |
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BlockEnvironment
Items external to the virtual machine itself, provided by the environment.
| 34 | @dataclass |
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class BlockEnvironment:
chain_id
| 40 | chain_id: U64 |
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state
| 41 | state: State |
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block_gas_limit
| 42 | block_gas_limit: Uint |
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block_hashes
| 43 | block_hashes: List[Hash32] |
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coinbase
| 44 | coinbase: Address |
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number
| 45 | number: Uint |
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base_fee_per_gas
| 46 | base_fee_per_gas: Uint |
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time
| 47 | time: U256 |
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prev_randao
| 48 | prev_randao: Bytes32 |
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excess_blob_gas
| 49 | excess_blob_gas: U64 |
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parent_beacon_block_root
| 50 | parent_beacon_block_root: Hash32 |
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BlockOutput
Output from applying the block body to the present state.
Contains the following:
block_gas_used : ethereum.base_types.Uint
Gas used for executing all transactions.
transactions_trie : ethereum.fork_types.Root
Trie of all the transactions in the block.
receipts_trie : ethereum.fork_types.Root
Trie root of all the receipts in the block.
receipt_keys :
Key of all the receipts in the block.
block_logs : Bloom
Logs bloom of all the logs included in all the transactions of the
block.
withdrawals_trie : ethereum.fork_types.Root
Trie root of all the withdrawals in the block.
blob_gas_used : ethereum.base_types.U64
Total blob gas used in the block.
requests : Bytes
Hash of all the requests in the block.
| 53 | @dataclass |
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class BlockOutput:
block_gas_used
| 79 | block_gas_used: Uint = Uint(0) |
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transactions_trie
| 80 | transactions_trie: Trie[ |
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| 81 | Bytes, Optional[Bytes | LegacyTransaction] |
| 82 | ] = field(default_factory=lambda: Trie(secured=False, default=None)) |
receipts_trie
| 83 | receipts_trie: Trie[Bytes, Optional[Bytes | Receipt]] = field( |
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| 84 | default_factory=lambda: Trie(secured=False, default=None) |
| 85 | ) |
receipt_keys
| 86 | receipt_keys: Tuple[Bytes, ...] = field(default_factory=tuple) |
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block_logs
| 87 | block_logs: Tuple[Log, ...] = field(default_factory=tuple) |
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withdrawals_trie
| 88 | withdrawals_trie: Trie[Bytes, Optional[Bytes | Withdrawal]] = field( |
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| 89 | default_factory=lambda: Trie(secured=False, default=None) |
| 90 | ) |
blob_gas_used
| 91 | blob_gas_used: U64 = U64(0) |
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requests
| 92 | requests: List[Bytes] = field(default_factory=list) |
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TransactionEnvironment
Items that are used by contract creation or message call.
| 95 | @dataclass |
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class TransactionEnvironment:
origin
| 101 | origin: Address |
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gas_price
| 102 | gas_price: Uint |
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gas
| 103 | gas: Uint |
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access_list_addresses
| 104 | access_list_addresses: Set[Address] |
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access_list_storage_keys
| 105 | access_list_storage_keys: Set[Tuple[Address, Bytes32]] |
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transient_storage
| 106 | transient_storage: TransientStorage |
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blob_versioned_hashes
| 107 | blob_versioned_hashes: Tuple[VersionedHash, ...] |
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index_in_block
| 109 | index_in_block: Optional[Uint] |
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tx_hash
| 110 | tx_hash: Optional[Hash32] |
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traces
| 111 | traces: List[dict] |
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Message
Items that are used by contract creation or message call.
| 114 | @dataclass |
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class Message:
block_env
| 120 | block_env: BlockEnvironment |
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tx_env
| 121 | tx_env: TransactionEnvironment |
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caller
| 122 | caller: Address |
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target
| 123 | target: Bytes0 | Address |
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current_target
| 124 | current_target: Address |
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gas
| 125 | gas: Uint |
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value
| 126 | value: U256 |
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data
| 127 | data: Bytes |
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code_address
| 128 | code_address: Optional[Address] |
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code
| 129 | code: Bytes |
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depth
| 130 | depth: Uint |
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should_transfer_value
| 131 | should_transfer_value: bool |
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is_static
| 132 | is_static: bool |
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accessed_addresses
| 133 | accessed_addresses: Set[Address] |
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accessed_storage_keys
| 134 | accessed_storage_keys: Set[Tuple[Address, Bytes32]] |
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disable_precompiles
| 135 | disable_precompiles: bool |
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parent_evm
| 136 | parent_evm: Optional["Evm"] |
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Evm
The internal state of the virtual machine.
| 139 | @dataclass |
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class Evm:
pc
| 143 | pc: Uint |
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stack
| 144 | stack: List[U256] |
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memory
| 145 | memory: bytearray |
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code
| 146 | code: Bytes |
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gas_left
| 147 | gas_left: Uint |
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valid_jump_destinations
| 148 | valid_jump_destinations: Set[Uint] |
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logs
| 149 | logs: Tuple[Log, ...] |
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refund_counter
| 150 | refund_counter: int |
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running
| 151 | running: bool |
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message
| 152 | message: Message |
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output
| 153 | output: Bytes |
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accounts_to_delete
| 154 | accounts_to_delete: Set[Address] |
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return_data
| 155 | return_data: Bytes |
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error
| 156 | error: Optional[EthereumException] |
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accessed_addresses
| 157 | accessed_addresses: Set[Address] |
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accessed_storage_keys
| 158 | accessed_storage_keys: Set[Tuple[Address, Bytes32]] |
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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:
| 162 | """ |
|---|---|
| 163 | Incorporate the state of a successful `child_evm` into the parent `evm`. |
| 164 | |
| 165 | Parameters |
| 166 | ---------- |
| 167 | evm : |
| 168 | The parent `EVM`. |
| 169 | child_evm : |
| 170 | The child evm to incorporate. |
| 171 | """ |
| 172 | evm.gas_left += child_evm.gas_left |
| 173 | evm.logs += child_evm.logs |
| 174 | evm.refund_counter += child_evm.refund_counter |
| 175 | evm.accounts_to_delete.update(child_evm.accounts_to_delete) |
| 176 | evm.accessed_addresses.update(child_evm.accessed_addresses) |
| 177 | evm.accessed_storage_keys.update(child_evm.accessed_storage_keys) |
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:
| 181 | """ |
|---|---|
| 182 | Incorporate the state of an unsuccessful `child_evm` into the parent `evm`. |
| 183 | |
| 184 | Parameters |
| 185 | ---------- |
| 186 | evm : |
| 187 | The parent `EVM`. |
| 188 | child_evm : |
| 189 | The child evm to incorporate. |
| 190 | """ |
| 191 | evm.gas_left += child_evm.gas_left |