Neo-CLI v3.9 was released on January 19, 2026, will be deployed to T5 TestNet on January 21, and is scheduled for MainNet on February 3, 2026.

This release includes a hard fork, and upgrading as soon as possible is strongly recommended. Please upgrade before February 3, 2026 to avoid a full resync. Nodes upgraded before the fork will not require resyncing.

Note: Please do not use the old config.json configuration file version and please install the latest version of plugins.

• TestNet hard fork height: Block 12,960,000
• MainNet hard fork height: Block 8,800,000

Key Updates in v3.9.0

This upgrade mainly includes the following improvements:

1. Added BIP32 hierarchical deterministic wallet and BIP39 mnemonic phrase support, enhancing wallet security and user experience.

2. Added Treasury native contract for managing Neo network funds and reward distribution.

3. Native contracts (Treasury, Notary, Oracle) now support NEP-30 standard, improving contract interoperability.

4. Added contract fee whitelist feature, allowing specific contract methods to be fee-free, reducing user costs.

5. Replaced native logging system with Serilog, providing more powerful logging and structured log support.

6. Added Storage.Local API, allowing contracts to use isolated local storage space, with data visible only to the contract itself.

7. Added RESTful API server plugin, providing HTTP interfaces for blockchain data access, contract invocation, and token queries.

8. Added invokeabi command to CLI, simplifying contract invocation process, supporting direct contract method calls via ABI.

9. SHA3-512 and Blake2b-512 Support

Stay informed and prepare accordingly. If you have any questions, feel free to reach out via our Discord channel.