Upgrade 17 Jovian hardfork
Notice date: December 19, 2025
Target Network: GIWA Testnet (Sepolia)
Overview
GIWA Chain will apply the Jovian hard fork (Upgrade 17 protocol update) from the OP Stack. This upgrade includes changes related to transaction fee calculations and block header fields, aiming to improve overall network stability and operational efficiency.
Because this upgrade is a hardfork, it introduces protocol-level changes. Node operators must upgrade to the latest version before the scheduled activation time.
Schedule
Testnet (Sepolia): December 30, 2025 at 14:00:00 KST (Unix timestamp: 1767070800)
For Developers
Changes to transaction fee calculations and certain block header fields (
extraData,blobGasUsed) may require compatibility checks if your node, indexer, or tooling relies on these fields.
For Node Operators
Node operators must upgrade to the latest node version before the scheduled Jovian hard fork.
For detailed information, please refer to the giwa-io/node release notes.
Learn more
Want to learn more about Upgrade 17? Check out the OP Stack documentation.
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