Serverless

codename: lawndart

Client-Only architecture

• Android app
• Storj storage, over REST

Authentication

• one user secret per username
• password hashes to a key with value of the user secret

Storage

Building on a key/value storage, a two level linked list is maintained. The leaves being each lat/lng report, and the parent level being a day's worth of updates.

• Daily Index key: user secret+date, value: head of day list, link to previous day
• Each location: key: rando value: lat/lng, link to previous day entry

Update procedure

• Put key: rando, value: lat/lng, link to previous day
• Put/update key: user secret+date, value: rando key (above)

Retrieve procedure

Latest position

• Get key: user secret, value: full name, photo url, etc, master head key
• Get key: master head key, value: most recent rando key
• Get key: rando, value: latest location

Last 100 points

• using latest location record, use date to make Day hash key
• Get key: day hash, value: head of day
• Follow day list