ethereum.forks.frontier.utils.addressethereum.forks.homestead.utils.address

Hardfork Utility Functions For Addresses.

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

Introduction

Address specific functions used in this frontier version of specification.Address specific functions used in this homestead version of specification.

to_address_masked

Convert a Uint or U256 value to a valid address (20 bytes).

Parameters

data : The numeric value to be converted to address.

Returns

address : Address The obtained address.

def to_address_masked(​data: Uint | U256​) -> Address:
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    """
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    Convert a Uint or U256 value to a valid address (20 bytes).
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    Parameters
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    ----------
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    data :
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        The numeric value to be converted to address.
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    Returns
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    -------
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    address : `Address`
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        The obtained address.
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    """
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    return Address(data.to_be_bytes32()[-20:])

compute_contract_address

Computes address of the new account that needs to be created.

Parameters

address : The address of the account that wants to create the new account. nonce : The transaction count of the account that wants to create the new account.

Returns

address: ethereum.forks.frontier.fork_types.Addressethereum.forks.homestead.fork_types.Address The computed address of the new account.

def compute_contract_address(​address: Address, ​​nonce: Uint​) -> Address:
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    """
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    Computes address of the new account that needs to be created.
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    Parameters
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    ----------
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    address :
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        The address of the account that wants to create the new account.
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    nonce :
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        The transaction count of the account that wants to create the new
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        account.
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    Returns
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    -------
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    address: `ethereum.forks.frontier.fork_types.Address`
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    address: `ethereum.forks.homestead.fork_types.Address`
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        The computed address of the new account.
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    """
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    computed_address = keccak256(rlp.encode([address, nonce]))
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    canonical_address = computed_address[-20:]
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    padded_address = left_pad_zero_bytes(canonical_address, 20)
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    return Address(padded_address)