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Neo Smart Economy

Neo-CLI 3.2.1 Upgrade and T5 TestNet Setup Notice

Neo-CLI v3.2.1 was released on April 21, 2022, and will be deployed to the TestNet on April 22, 2022. A list of improvements and optimizations in this version can be found below:

  • Limit the size of the VM result stack
  • Fix OOM issue in JSON processing by limiting the number of intermediate objects
  • Added Murmur32 Hash algorithm to the native contract CryptoLib
  • Increase the MaxBlockSize by 10 times, and reduce the maximum allowable execution system fee per block to 1,500 GAS
  • Increase the Max Transactions per block to 5000
  • Add new TestNet network ID
  • Support automatically installing plugin dependencies in Neo-CLI

Due to native contract modification in Neo-CLI v3.2.1, some TestNet data will be incompatible. A brand new TestNet, T5, will be set up to host Neo-CLI v3.2.1. The T5 TestNet will run in parallel with the current T4 TestNet, which will be maintained until the end of August. Following this point, the T4 TestNet will be deprecated and taken down.

Infrastructure such as explorers, wallets, and SDKs will gradually update for T5 TestNet, it is suggested that Neo Polaris Launchpad projects still keep developing on T4 TestNet.

After Neo-CLI v3.2.1 runs smoothly on TestNet T5, it is expected to be deployed to the N3 MainNet after two weeks. The impact of increasing the Max Transaction per block will be heavily monitored and evaluated before it is moved onto MainNet.

Please note: The TestNet T5 version is not compatible with the previous version and requires a data resync.

Learn more

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Join the Neo community: Discord / Telegram




Neo is an open-source, community driven platform that is leveraging the intrinsic advantages of blockchain technology to realize the optimized digital world of the future.

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