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A modular, open-source layer that sits between market data venues and algo trading pipelines to enforce fine-grained, policy-driven data access while preserving auditability and traceability across venues. FeedTrust provides a policy DSL to declare w
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README.md

FeedTrust: Blockchain-backed Access Control & Provenance for Cross-Venue Market Data Feeds

Overview

  • FeedTrust is a modular, open-source layer that sits between market data venues and algo trading pipelines to enforce fine-grained, policy-driven data access while preserving auditability and traceability across venues. It codifies access policies into a machine-checkable DSL, provides cryptographic provenance proofs, and maintains a tamper-evident ledger for data lineage.

Architecture (production-ready mindset)

  • Policy DSL core and compiler (feedtrust/policy.py)
  • Provenance ledger (Merkle-based) with proofs (feedtrust/ledger_merkle.py)
  • Adapters for feeds (FIX/WebSocket) to canonical signals (feedtrust/adapters/*)
  • Lightweight aggregation layer for cross-venue signals (feedtrust/aggregation.py)
  • Core orchestrator to enforce policies and log provenance (feedtrust/core.py)

MVP Scope (as implemented in this repo)

  • Tiny policy DSL with allow and deny rules
  • Two toy adapters bridging FIX and WebSocket feeds to canonical signals
  • Merkle-based provenance ledger with a simple proof mechanism
  • Simple cross-venue aggregator for price-like signals
  • End-to-end flow: ingest adapter signals, log to ledger, generate aggregates, expose root proof

How to Run

  • Prerequisites: Python 3.11+
  • Install test dependencies: pytest
  • Run tests: ./test.sh
  • Build package: python -m build

Notes

  • This project is designed as an MVP and a proof-of-concept toward a production-grade, contract-governed data-gateway with verifiable provenance.
  • See AGENTS.md for repository conventions and testing commands.