Neo-CLI v3.6.2 TestNet and MainNet Upgrade Notice

2 min readNov 20, 2023


Neo-CLI v3.6.2 was released on November 17th, 2023, and will be deployed to T5 TestNet on November 21st, 2023, and to MainNet on December 4th, 2023. Below is a list of improvements and optimizations included in this release:

  • Add a new syscall “CurrentSigners” for getting current tx signers
  • Add a new function in native StdLib contract name as “StrLen” for getting String length in smart contract.
  • Set attribute fee for transactions with “conflict” attribute
  • Add cancel command both in neo-cli and rpc for canceling transactions which haven’t been on-chain yet.

Please note: This upgrade involves changes to native contracts and the VM. When upgrading, it’s essential to resynchronize data. Do not use the old version of the configuration file, config.json.

About Neo

Founded in 2014, Neo is an open-source, community-driven blockchain platform designed to welcome developers into the Smart Economy. By enabling developers to digitize and automate the management of assets through smart contracts, Neo is built to realize the optimized digital world of the future. As the most developer-friendly blockchain, Neo meets developers where they are by integrating seamlessly with the world’s most widely used languages and tools and providing the most feature-complete blockchain platform for building full-stack decentralized applications. With native support for powerful infrastructure including decentralized storage, oracles, and domain name service, Neo is the ideal foundation for developers to build the next generation Internet.

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