mirror of
https://gitlab.com/pulsechaincom/staking-deposit-cli.git
synced 2025-01-10 21:11:21 +00:00
91 lines
2.2 KiB
Python
91 lines
2.2 KiB
Python
from ssz import (
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ByteVector,
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Serializable,
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uint64,
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bytes4,
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bytes32,
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bytes48,
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bytes96
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)
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from eth2deposit.utils.constants import (
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DOMAIN_DEPOSIT,
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ZERO_BYTES32,
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)
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bytes8 = ByteVector(8)
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# Crypto Domain SSZ
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class SigningData(Serializable):
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fields = [
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('object_root', bytes32),
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('domain', bytes32)
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]
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class ForkData(Serializable):
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fields = [
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('current_version', bytes4),
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('genesis_validators_root', bytes32),
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]
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def compute_deposit_domain(fork_version: bytes) -> bytes:
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"""
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Deposit-only `compute_domain`
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"""
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assert len(fork_version) == 4
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domain_type = DOMAIN_DEPOSIT
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fork_data_root = compute_deposit_fork_data_root(fork_version)
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return domain_type + fork_data_root[:28]
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def compute_deposit_fork_data_root(current_version: bytes) -> bytes:
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"""
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Return the appropriate ForkData root for a given deposit version.
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"""
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genesis_validators_root = ZERO_BYTES32 # For deposit, it's fixed value
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assert len(current_version) == 4
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return ForkData(
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current_version=current_version,
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genesis_validators_root=genesis_validators_root,
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).hash_tree_root
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def compute_signing_root(ssz_object: Serializable, domain: bytes) -> bytes:
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"""
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Return the signing root of an object by calculating the root of the object-domain tree.
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The root is the hash tree root of:
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https://github.com/ethereum/eth2.0-specs/blob/dev/specs/phase0/beacon-chain.md#signingdata
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"""
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assert len(domain) == 32
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domain_wrapped_object = SigningData(
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object_root=ssz_object.hash_tree_root,
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domain=domain,
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)
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return domain_wrapped_object.hash_tree_root
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class DepositMessage(Serializable):
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"""
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Ref: https://github.com/ethereum/eth2.0-specs/blob/dev/specs/phase0/beacon-chain.md#depositmessage
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"""
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fields = [
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('pubkey', bytes48),
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('withdrawal_credentials', bytes32),
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('amount', uint64),
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]
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class DepositData(Serializable):
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"""
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Ref: https://github.com/ethereum/eth2.0-specs/blob/dev/specs/phase0/beacon-chain.md#depositdata
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"""
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fields = [
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('pubkey', bytes48),
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('withdrawal_credentials', bytes32),
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('amount', uint64),
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('signature', bytes96)
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]
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