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67 lines
1.9 KiB
Python
67 lines
1.9 KiB
Python
"""Shielded balance commitments — Sprint 11+ scaffolding.
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Source of truth: ``infonet-economy/IMPLEMENTATION_PLAN.md`` §4.3.
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Pedersen commitments hide balance amounts while preserving
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homomorphic add/subtract. Range proofs (Bulletproofs or similar)
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prove each output is non-negative without revealing it.
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A balance is committed as ``C = amount * G + blinding * H`` where
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``G, H`` are independent generators. ``sum(inputs) - sum(outputs)
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== 0`` proves "no value created or destroyed" without revealing any
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of the values.
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Production implementation lands through the ``BalanceCommitment``
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Protocol when the Rust binding is ready.
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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 ShieldedBalanceScaffolding:
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"""Placeholder until the Rust balance-commitment binding lands."""
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_DIAGNOSTIC = (
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"Shielded balance primitive is scaffolding only — production "
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"implementation requires a Pedersen commitment + range-proof "
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"library (e.g. bulletproofs). See "
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"infonet-economy/IMPLEMENTATION_PLAN.md §4.3."
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)
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def commit(self, *, amount: int, blinding: bytes) -> bytes:
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raise NotImplementedError(self._DIAGNOSTIC)
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def verify_balance(
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self,
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*,
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input_commitments: list[bytes],
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output_commitments: list[bytes],
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) -> bool:
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raise NotImplementedError(self._DIAGNOSTIC)
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def range_proof(
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self,
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*,
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amount: int,
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blinding: bytes,
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max_bits: int = 64,
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) -> bytes:
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raise NotImplementedError(self._DIAGNOSTIC)
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def verify_range_proof(
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self,
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*,
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commitment: bytes,
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proof: bytes,
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max_bits: int = 64,
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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__ = ["ShieldedBalanceScaffolding"]
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