Gridstamp

Create a tamper-evident spatial stamp at a GPS coordinate. Returns a cryptographically signed proof-of-presence receipt.

Verify a spatial stamp's integrity. Checks HMAC signature and timestamp to detect tampering.

Store spatial context to persistent memory. Tags a location with metadata for later recall.

Recall spatial memories near a location or matching tags.

Build an IETF COSE Merkle inclusion proof (draft-ietf-cose-merkle-tree-proofs-18) over an ordered sequence of spatial stamps. Each stamp's leaf hash is combined into a tree head (tree_size + root_hash + timestamp); the returned chain carries the audit path segments needed to re-derive the root. Use for delivery audit trails and regulator-facing evidence.

Verify an IETF COSE Merkle inclusion proof produced by proof_chain. Recomputes each leaf hash, walks the audit path up to the expected root_hash, and checks the tree head signature. Reports per-leaf validity plus the overall tree-head status.

Create a spatial settlement — payment that requires proof-of-presence at a location. Used for delivery confirmation, service completion, and location-based contracts.

Run anti-spoofing analysis on a stamp. Checks for GPS spoofing signals: impossible speed, duplicate timestamps, coordinate anomalies.

List all spatial stamps for this robot, most recent first.

List all spatial settlements for this robot.

Get robot status: ID, total stamps, memories, settlements, last known location.

Takes no parameters.

Calculate distance in km between two GPS coordinates using the Haversine formula.