Developers building on the Internet Computer (IC) can now integrate SQLite databases directly into their Rust-based canisters with the new ic-rusqlite package. This wrapper around the rusqlite crate makes it easier to embed SQLite functionality, providing local database capabilities without the need for a separate server.
Getting started involves adding ic-rusqlite to a project and configuring the canister to work with WebAssembly. Developers specify custom build steps to ensure compatibility with IC’s architecture, and the wasi2ic tool produces a WebAssembly executable ready to run on the network.
Database connections are created automatically on the first call to ic-rusqlite, and data is stored in stable memory. By default, the main database is located in a dedicated folder in the canister’s virtual file system, and settings can be adjusted to suit specific storage needs. This integration ensures that data persists even when canisters are upgraded, an important feature for applications that require consistent state over time.
The package also supports additional stable structures, allowing developers to allocate memory for other storage needs while keeping the main database safe. Using the memory manager is recommended to prevent accidental corruption of data stored in stable memory.
Performance is a key consideration, particularly with larger databases. Developers are encouraged to design schemas and queries to minimise heavy operations, as IC has instruction limits that can affect complex database tasks. Indexing and careful query planning can help maintain efficiency while working with SQLite within canisters.
For developers familiar with SQLite, ic-rusqlite brings a familiar database environment to the Internet Computer. It offers a practical, reliable, and efficient way to manage data-driven applications entirely within canisters.
Dear Reader,
Ledger Life is an independent platform dedicated to covering the Internet Computer (ICP) ecosystem and beyond. We focus on real stories, builder updates, project launches, and the quiet innovations that often get missed.
We’re not backed by sponsors. We rely on readers like you.
If you find value in what we publish—whether it’s deep dives into dApps, explainers on decentralised tech, or just keeping track of what’s moving in Web3—please consider making a donation. It helps us cover costs, stay consistent, and remain truly independent.
Your support goes a long way.
🧠 ICP Principal: ins6i-d53ug-zxmgh-qvum3-r3pvl-ufcvu-bdyon-ovzdy-d26k3-lgq2v-3qe
🧾 ICP Address: f8deb966878f8b83204b251d5d799e0345ea72b8e62e8cf9da8d8830e1b3b05f
🪙 BTC Wallet: bc1pp5kuez9r2atdmrp4jmu6fxersny4uhnaxyrxau4dg7365je8sy2q9zff6p
Every contribution helps keep the lights on, the stories flowing, and the crypto clutter out.
Thank you for reading, sharing, and being part of this experiment in decentralised media.
—Team Ledger Life
