The Neo Core growth staff has revealed Neo Categorical v3.9.1, the primary official replace to the native blockchain device since Might 2025. Launched on Feb. 4, the brand new model introduces help for .NET 10.0, updates compatibility with Neo-CLI v3.9.1, and incorporates intensive refinements geared toward bettering developer workflows.
Key upgrades in Neo Categorical v3.9.1
Neo Categorical v3.9.1 consolidates 39 merged pull requests throughout a number of focus areas, together with bug fixes, safety upgrades, platform help, and infrastructure upkeep. It removes legacy framework targets, improves cross-platform usability, and resolves long-standing points affecting good contract testing, localization, and debugging.
Platform & framework updates
.NET 10 compatibility: Neo Categorical now targets .NET 10.0, the newest model of Microsoft’s growth platform (#515), guaranteeing builders can leverage the latest framework options and efficiency enhancements. This replace additionally removes legacy .NET Customary and .NET Framework targets (#496), streamlining the codebase and lowering upkeep overhead.
Neo v3.9.1 integration: The discharge upgrades Neo Categorical to align with Neo-CLI v3.9.1 (#516), guaranteeing compatibility with the newest protocol options together with the contract payment whitelist, Treasury native contract, and enhanced execution payment issue precision.
Multi-platform binaries: Pre-built binaries at the moment are out there for a number of platforms together with Linux (x64, ARM64, musl), macOS (x64, ARM64), and Home windows (x64, ARM64), offering native help throughout growth environments.
Growth workflow enhancements
Enhanced command execution: The RunDotNetCommand methodology now makes use of argument lists as an alternative of string concatenation (#478), bettering reliability and lowering potential errors when executing .NET CLI instructions throughout good contract growth and testing.
Improved check infrastructure: Take a look at command execution has been refactored to get rid of code duplication throughout check courses (#480), making the check suite extra maintainable and lowering the chance of inconsistent conduct throughout completely different testing situations.
Localization fixes: Resolved a difficulty the place the Test02_BuildValidation check would fail when run in non-English language environments (#483), bettering the worldwide developer expertise.
Bug fixes & stability
A number of crucial bug fixes enhance Neo Categorical reliability:
State service enhancements: Mounted points in StateServiceStore (#493) and MemoryTrackingStore courses (#492), bettering blockchain state administration and reminiscence monitoring throughout growth and testing workflows.
Storage merchandise dealing with: Resolved a difficulty the place unknown storage objects would trigger errors as an alternative of returning null in GetProvenState (#491), stopping crashes when querying non-existent blockchain state.
Switch state accuracy: Mounted incorrect state reporting in GetTransfers methodology (#494), guaranteeing correct monitoring of token transfers throughout growth and testing.
$NFT help enhancements: Corrected $NFT switch token parsing and stability stack order (#507), resolving points builders encountered when testing $NFT contracts.
Neo-trace protocol settings: Mounted protocol settings in neo-trace and improved error messaging when hint operations fail (#488), enhancing debugging capabilities.
Present listing dealing with: Resolved path decision points that might trigger instructions to fail when executed from sure working directories (#495).
Neo3-visual-tracker launch obtain: Mounted obtain points affecting the Neo3 Visible Tracker extension (#499), guaranteeing builders can correctly set up and use the Visible Studio Code extension.
Snapshot information dealing with: Modified snapshot performance so as to add a replica of entries as an alternative of the listing itself (#490), stopping unintended unwanted effects and information corruption throughout state snapshots.
Safety updates
The discharge addresses quite a few safety vulnerabilities via dependency updates within the neo3-visual-tracker extension:
- Up to date tar-fs (2.1.1 → 2.1.4) (#476, #500) to deal with archive extraction vulnerabilities
- Up to date base-x (5.0.0 → 5.0.1) (#473) for improved base encoding safety
- Up to date pbkdf2 (3.1.2 → 3.1.3) (#477) for password-based key derivation
- Up to date cipher-base (1.0.4 → 1.0.6) (#497) for cryptographic operations
- Up to date sha.js (2.4.11 → 2.4.12) (#498) for SHA hashing features
- Up to date tmp (0.2.1 → 0.2.4) (#489) for short-term file dealing with
- Up to date js-yaml (#509) for YAML parsing safety
- Up to date jws (3.2.2 → 3.2.3) (#511) for JSON Internet Signature dealing with
- Up to date qs (6.14.0 → 6.14.1) (#512) for question string parsing
- Up to date undici (7.16.0 → 7.18.2) (#513) for HTTP shopper operations
- Up to date @isaacs/brace-expansion (5.0.0 → 5.0.1) (#518) for glob sample matching
- Up to date Microsoft.Construct.Utilities.Core (17.14.8 → 17.14.28) (#505, #506) for construct tooling
- Basic safety bundle updates (#502, #510)
These updates collectively deal with crucial and high-severity safety vulnerabilities, guaranteeing Neo Categorical stays safe for growth workflows.
Code high quality enhancements
Deprecated methodology updates: Changed deprecated methodology calls all through the codebase (#482), guaranteeing compatibility with present and future .NET releases and lowering compiler warnings.
Warning discount: Cleaned up varied compiler warnings (#501), bettering code high quality and making it simpler for builders to determine real points in their very own code.
Package deal model updates: Common dependency upkeep (#479, #503) to maintain the undertaking present with upstream adjustments.
Compatibility
Neo Categorical v3.9.1 is suitable with Neo-CLI v3.9.1 and later. Builders utilizing Neo Categorical for native blockchain testing ought to replace to this model to make sure compatibility with the newest protocol options and MainNet/TestNet conduct.
The replace requires .NET 10.0 SDK for builders constructing from supply. Pre-built binaries can be found for builders preferring to not compile the tooling themselves.
Neo Categorical v3.9.1 can will be downloaded from the hyperlink under:
https://github.com/neo-project/neo-express/releases/tag/3.9.1
