Kaia v2.2.0 is a Kairos testnet-only hardfork release (Osaka).
Hardfork @ block 209,134,000 (~11 Feb, 10:30 UTC+9).
Mainnet hardfork number will be specified in the next release.
All Kairos testnet nodes must upgrade to v2.2.0+ before the hardfork block.
What to focus on (high level)
- Osaka hardfork + BlobTx (KIP-279 / EIP-4844 family): data-availability foundations/blob transaction plumbing.
- secp256r1 precompile (EIP-7951): groundwork for passkey/WebAuthn-style UX + related smart account patterns.
- eth_config (KIP-276) + ModExp gas alignment: better tooling/operator parity + fork coordination.
Release notes: Release Kaia v2.2.0 Release Notice · kaiachain/kaia · GitHub