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63 lines
1.9 KiB
Python
63 lines
1.9 KiB
Python
"""Stealth addresses — Sprint 11+ scaffolding.
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Source of truth: ``infonet-economy/IMPLEMENTATION_PLAN.md`` §4.3.
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Each transaction generates a fresh one-time recipient address
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unlinkable from the recipient's published key. The recipient uses a
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private *view key* to scan the chain and identify outputs intended
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for them.
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Standard scheme (Monero-style, dual-key):
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- Recipient publishes ``(view_pub, spend_pub)``.
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- Sender generates random ``r``, computes
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``one_time_address = H(r * view_pub) * G + spend_pub``.
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- Recipient scans chain by checking if
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``H(view_priv * R) * G + spend_pub == one_time_address`` for each
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output's ``R = r * G``.
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Production implementation lands through the ``StealthAddressScheme``
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Protocol when the Rust binding is ready. Today, this module ships a
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``StealthAddressScaffolding`` placeholder that reports
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``NOT_IMPLEMENTED``.
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"""
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from __future__ import annotations
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from services.infonet.privacy.contracts import PrivacyPrimitiveStatus
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class StealthAddressScaffolding:
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"""Placeholder until the Rust stealth-address binding lands."""
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_DIAGNOSTIC = (
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"Stealth address primitive is scaffolding only — see "
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"infonet-economy/IMPLEMENTATION_PLAN.md §4.3 for the design. "
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"Production implementation lands via privacy-core Rust crate."
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)
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def derive_one_time_address(
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self,
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*,
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recipient_view_key: bytes,
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recipient_spend_key: bytes,
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sender_random: bytes,
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) -> bytes:
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raise NotImplementedError(self._DIAGNOSTIC)
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def is_for_recipient(
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self,
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*,
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one_time_address: bytes,
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recipient_view_key: bytes,
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recipient_spend_key: bytes,
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sender_random: bytes,
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) -> bool:
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raise NotImplementedError(self._DIAGNOSTIC)
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def status(self) -> PrivacyPrimitiveStatus:
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return PrivacyPrimitiveStatus.NOT_IMPLEMENTED
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__all__ = ["StealthAddressScaffolding"]
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