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Problem: Space missions face extreme delays, partitions, and multi-party data sharing across rovers, habitat modules, satellites, and ground stations. Traditional centralized data stores fail under long outages or latency, and data provenance, govern
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README.md

CosmicLedger MVP

Overview

  • A minimal, offline-first verifiable ledger designed for partitioned networks (e.g., interplanetary missions).
  • Local append-only ledger with cryptographic signatures, Merkle-DAG proofs, and delta-based reconciliation.
  • A simple Data Contracts Registry to define and version mission data schemas (Telemetry, SensorData, Event, Command, Hazard).
  • Delta export/import to synchronize logs between nodes with compact proofs.
  • Optional cloud-ground anchoring concept (not implemented in this MVP).

What you can run here

  • A tiny Python package that provides: LocalLedger, DeltaLog, DataContractRegistry, and a tiny Signer using HMAC.
  • test.sh script to build and run a basic cross-node delta replication scenario with two ledgers using the same signer key.

How to use (high level)

  • Create a LocalLedger with a node-specific signer key.
  • Register data contracts (Telemetry, SensorData, Event, Command, Hazard).
  • Append entries to the local ledger.
  • Export a delta since a given index and apply it on another ledger to reconcile.
  • Compute Merkle roots to verify log integrity.

Notes

  • This is an MVP; cryptographic signing uses HMAC for simplicity in this prototype. In a production setting, you'd replace with Ed25519 or ECDSA and proper key management.
  • No external network code is included; delta exchange is simulated via in-process data structures for MVP validation.

Contributing

  • See AGENTS.md for architectural rules and testing protocol.

License: MIT

Improvements (Post-MVP Goals)

  • Cloud anchoring: Optional anchoring of log roots to a trusted ground anchor for long-term verifiability across partitions.
  • Governance ledger: Lightweight event-sourced log for data-access decisions, policy changes, and contract amendments.
  • Delta proofs: Plan to extend delta exports to include compact Merkle proofs for selective entry verification.
  • Interoperability bridges: Start mapping core primitives to canonical data schemas for ecosystem interoperability.
  • Observability: Instrumentation for proof sizes, reconciliation latency, and data-integrity guarantees.

READY_TO_PUBLISH marker is created when this MVP is deemed production-ready in a real SWARM build.