SDK v1.2.1

The 1.2.1 updates bring bug fixes for Permissionless Interoperability and interchain gas payments. Also minor improvements to the MultiProvider interface and a Zod schema for validating ChainMetadata objects.

What's Changed

• Proxy middlewares in SDK deployers by @yorhodes in #1838
• On chain gas oracles in the IGP by @tkporter in #1765
• Improve MultiProvider explorer url handling by @jmrossy in #1898

Full Changelog: v1.2.0...v1.2.1