LarvaDB

LarvaDB turns object storage services like Vercel Blob, S3, or R2 into a durable SQL database with transactions, time travel, and a Postgres-compatible interface. It runs without a separate database server or connection strings, distributing as an npm package called @larva-db/core under an MIT license. The project includes a tagged-template query API and supports features like typed schemas and automated migrations.

The system uses a compare-and-swap operation on the manifest for every commit, ensuring that concurrent writers rebase or re-run, and conflicts fail loudly. This approach eliminates silent data loss and ensures that every write path involves exactly one CAS swap per commit.

The tagged-template API extracts parameters and rejects multiple statements per string outright, ensuring that parameters are never concatenated. This design fits the entire API on one screen, promoting clarity and simplicity in code.

The system provides a seeded demo store with customers, orders, and sequence-numbered invoices to help users get started quickly. Users can run queries like joins, filters, and revenue calculations directly on this live data.

The npm package @larva-db/core is distributed under an MIT license, making it accessible for various development needs. The package includes 297 automated checks on every push to ensure code quality.

The system ensures that every row returned is already typed, and sequences and UUIDs assign themselves automatically. Adding a nullable column in code migrates the store on connect, simplifying schema changes.

The system is private by construction, ensuring that data blobs are kept secure and accessible only to authorized users. This design prioritizes data privacy and security.

The official website of LarvaDB is larvadb.dev.

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