v0.37.0

Highlights in this release

• Add client for CometBFT 1.x (Comet1Client)
• Modernize dependencies to reduce bundle size and reliability
• Set exports field to all packages. This prevents users from importing non-public interfaces and prepares for and ESM world.
• Deprecate executeKdf from both @cosmjs/amino and @cosmjs/proto-signing as wallet encryption will be removed (#1796).

Changelog: https://github.com/cosmos/cosmjs/blob/main/CHANGELOG.md#0370---2025-10-29
All changes: v0.36.1...v0.37.0

0.36.0

Encrypted wallet serialization deprecated!

• The use of encrypted wallet storage is deprecated. In particular this means:

  • Secp256k1HdWallet.serialize/.serializeWithEncryptionKey
  • Secp256k1HdWallet.deserialize/.deserializeWithEncryptionKey
  • DirectSecp256k1HdWallet.serialize/.serializeWithEncryptionKey
  • DirectSecp256k1HdWallet.deserialize/.deserializeWithEncryptionKey

  If you are using any of those methods, please comment at #1796.

  A scream test was established which slows down the key derivation function a lot. This simulates the use of a pure-JS implementation of Argon2 which we will use on one of the next releases. If this causes problems for your app, switch back to ^0.35.0 and comment in the issue.

• Migrate from libsodium to different implementation in order to reduce bundle size and improve compatibility.

  • ed25519 now uses @noble/curves
  • xchacha20poly1305 now uses @noble/ciphers
  • Argon2 now uses hash-wasm

0.35.0

Cosmos client

• Add timeout option to CometBFT clients
• Avoid unnecessary status request when connecting a Comet38Client, Tendermint37Client or Tendermint34Client
• Upgrade CosmJS types to Cosmos SDK 0.50
• Kill @cosmjs/cli to reduce maintenance burden
• Fix block result types in CometBFT clients

Modern JS

• Replace bn.js dependency with native bigints
• Modernize codebase for Node.js 20+
• Migrate away from axios to native fetch, reducing bundle size and external dependencies
• Preparation for better ES6 module support
• Replace the Node.js „crypto“ import with native crypto APIs to reduce problems with other environments
• All JS output is now ES2022

CI / tooling

• Migrate all CI jobs from CircleCI to GitHub Actions
• Migrate lint tooling to latest versions of eslint and typescript-eslint

Huge shout out to @dynst for an enoumous amount of high quality contributions to the 0.35.0 and 0.34.0 releases!

0.34.0

Significant updates

• Replace elliptic with noble-curves for the secp256k1 implementation
• Add support for CometBFT 1.x

Full Changelog: https://github.com/cosmos/cosmjs/blob/main/CHANGELOG.md#0340---2025-07-11

0.33.1

What's Changed

• chore: update discord link by @olliegilbey in #1626
• bump elliptic dependencies package to 6.6.1 by @codingki in #1628

New Contributors

• @olliegilbey made their first contribution in #1626
• @codingki made their first contribution in #1628

Full Changelog: v0.33.0...v0.33.1