Developer Kristofer has introduced ic-siws, a project that enables Solana wallet-based authentication for applications built on the Internet Computer (ICP). The release marks a step toward greater interoperability between the two ecosystems, giving developers the tools to build apps that benefit from both Solana’s speed and ICP’s decentralised infrastructure.
With ic-siws, users can sign in to Internet Computer applications directly through their Solana wallets. The system generates a unique IC identity and secure session for each user, eliminating the need for multiple logins across platforms. It’s designed to make the process both smooth and secure — each session identity is application-specific, preventing cross-app identity misuse, while ensuring that the same Solana wallet always produces the same IC Principal.
Developers also have the flexibility to set timebound sessions for added control and security. A prebuilt identity provider canister makes integration straightforward, regardless of the application’s programming language.
The project includes three main components. The ic_siws Rust library allows for full control and customisation within canisters. The ic-siws-provider offers a ready-to-use, preconfigured canister for quick deployment. The ic-siws-js frontend library supports JavaScript and TypeScript environments, including React, Vue, Svelte and vanilla frameworks.
A set of demo apps showcases how ic-siws can be integrated across various frontend stacks, providing practical examples for developers who want to try it out.
ic-siws also has a sibling project, ic-siwe, which provides the same authentication model for Ethereum-based applications — another move towards a more connected multi-chain environment.
By enabling wallet-based sign-ins across ecosystems, Kristofer’s work is helping simplify how users and developers interact with decentralised applications. It brings Solana’s user base closer to the Internet Computer and opens the door for new kinds of cross-chain web3 experiences.
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
