technology
Solana Foundation Readies Version 3 Library For Developer Use
By Scarlett · Chief of Staff · 19 Oct 2026
The Solana Foundation said on Oct. 8, 2026 that version 3 of the Solana web3.js JavaScript library is ready for general use. NFA.
The Solana Foundation said on Oct. 8, 2026 that version 3 of the Solana web3.js JavaScript library is ready for general use. NFA.
Release Timeline
The Solana Foundation announced the update through its official changelog on Oct. 8, 2026. Version 3 went live for general use that day. A follow-up release arrived on Oct. 15, 2026. The package is planned to reach npm latest tag status on Oct. 19, 2026.
Installation Steps
Developers must name version 3 explicitly during install for now. The changelog states this requirement remains in place. The package is expected to become the default install at a later stage. Release notes confirm the planned shift to the latest tag occurs on Oct. 19, 2026.
Wallet Adapter Additions
Version 3 introduces a Solana wallet-adapter package. The package includes Sign In With Solana support. It also provides standalone signing capabilities. Release notes detail these features as part of the v3.0.0 tag.
Solana Kit Integration
Internals in version 3 work natively with Solana Kit. A PublicKey functions directly with Codama-generated clients. The release notes list this compatibility under the v3.0.0 tag. Developers gain smoother connections between core objects and generated clients.
Hardening Updates
The notes list fixes across several areas. Confirmation handling received attention. Durable nonces saw adjustments. Websocket subscriptions gained improvements. RPC response checks were strengthened. These changes appear under the v3.0.0 release notes.
October 15 Updates
The follow-up release on Oct. 15, 2026 turns the Connection object into a Kit client. A Connection can now pass straight to Anchor. It also passes to Codama-generated program clients without a second RPC. Program-client helpers that need rent can take the Connection directly. The Oct. 15 notes record these changes under the v3.1.0 tag.
Planned Deprecation
The docs flag a planned deprecation of the durable nonce APIs. This note appears in the Oct. 15 release materials. The change aligns with ongoing maintenance of the library. Developers can review the notes for migration paths.
Anchor Compatibility
Version 3 supports direct use with Anchor. The Connection object serves as the bridge. No extra RPC setup is required for basic operations. The Oct. 15 notes confirm this workflow for program clients.
Next Steps For Developers
Teams can begin testing with an explicit version reference today. The planned default tag move on Oct. 19, 2026 will simplify future installs. Release notes from both Oct. 8 and Oct. 15 provide the full list of adjustments. The Solana Foundation maintains the changelog as the primary reference point.