ethereum.dao_fork.utils.address
Hardfork Utility Functions For Addresses ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
.. contents:: Table of Contents :backlinks: none :local:
Introduction
Address specific functions used in this Dao Fork version of specification.
to_address
Convert a Uint or U256 value to a valid address (20 bytes).
Parameters
data : The string to be converted to bytes.
Returns
address : Address
The obtained address.
def to_address(data: Uint | U256) -> Address:
24 | """ |
---|---|
25 | Convert a Uint or U256 value to a valid address (20 bytes). |
26 |
|
27 | Parameters |
28 | ---------- |
29 | data : |
30 | The string to be converted to bytes. |
31 |
|
32 | Returns |
33 | ------- |
34 | address : `Address` |
35 | The obtained address. |
36 | """ |
37 | 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.dao_fork.fork_types.Address
The computed address of the new account.
def compute_contract_address(address: Address, nonce: Uint) -> Address:
41 | """ |
---|---|
42 | Computes address of the new account that needs to be created. |
43 |
|
44 | Parameters |
45 | ---------- |
46 | address : |
47 | The address of the account that wants to create the new account. |
48 | nonce : |
49 | The transaction count of the account that wants to create the new |
50 | account. |
51 |
|
52 | Returns |
53 | ------- |
54 | address: `ethereum.dao_fork.fork_types.Address` |
55 | The computed address of the new account. |
56 | """ |
57 | computed_address = keccak256(rlp.encode([address, nonce])) |
58 | canonical_address = computed_address[-20:] |
59 | padded_address = left_pad_zero_bytes(canonical_address, 20) |
60 | return Address(padded_address) |