ethereum.constantinople.fork_typesethereum.istanbul.fork_types

Ethereum Types ^^^^^^^^^^^^^^

.. contents:: Table of Contents :backlinks: none :local:

Introduction

Types re-used throughout the specification, which are specific to Ethereum.

Address

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Address = Bytes20

Root

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Root = Hash32

Bloom

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Bloom = Bytes256

Account

State associated with an address.

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@slotted_freezable
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@dataclass
class Account:

nonce

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    nonce: Uint

balance

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    balance: U256

code

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    code: bytes

EMPTY_ACCOUNT

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EMPTY_ACCOUNT = Account(
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    nonce=Uint(0),
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    balance=U256(0),
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    code=bytearray(),
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)

encode_account

Encode Account dataclass.

Storage is not stored in the Account dataclass, so Accounts cannot be encoded without providing a storage root.

def encode_account(​raw_account_data: Account, ​​storage_root: Bytes​) -> Bytes:
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    """
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    Encode `Account` dataclass.
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    Storage is not stored in the `Account` dataclass, so `Accounts` cannot be
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    encoded without providing a storage root.
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    """
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    return rlp.encode(
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        (
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            raw_account_data.nonce,
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            raw_account_data.balance,
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            storage_root,
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            keccak256(raw_account_data.code),
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        )
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    )