Great question—this is a super common dilemma when working with evolving enterprise blockchain frameworks like Hyperledger Fabric. Let’s break down the tradeoffs and give you clear guidance:

First, Why You Probably Shouldn’t Default to 1.x #

• End-of-life risks: Fabric 1.x versions (notably 1.4) reached official end-of-support years ago. That means no security patches, bug fixes, or official updates. For long-running enterprise systems, relying on an unsupported version is a massive liability—especially if compliance and data security are priorities.
• Missing critical 2.0 features: Fabric 2.0 introduced game-changing improvements that simplify development and boost system robustness:
  • Private data collections for granular, permissioned data access
  • A simplified chaincode lifecycle that cuts out orderer involvement for deployments
  • Better scalability with channel sharding
    These features will save you hours of custom work and make your system more maintainable long-term.
• Ecosystem shift: Almost all active development, community support, and up-to-date tutorials now focus on 2.x and later versions. If you hit a roadblock with 1.x, you’ll struggle to get timely help compared to the vibrant 2.x community.

What to Do About the Missing 1.x Code Resources #

If those 1.x repositories have functionality you can’t live without, here are practical workarounds:

• Port the code to 2.x: Most 1.x chaincode or utility patterns can be adapted to 2.x with minimal effort. The core chaincode API changed but not drastically—you’ll mainly need to adjust for the new lifecycle and private data features. The official Fabric docs include step-by-step migration guides to help with this.
• Hunt for 2.x equivalents: Many popular 1.x tools have been upgraded or replaced in 2.x. For example, if you relied on a specific chaincode library, check the Fabric community GitHub repos or forums—someone might have already built a 2.x version, or the functionality might now be part of the core framework.
• Build it yourself (or contribute): If the functionality is niche, consider implementing it in 2.x. Not only will you end up with a modern, supported solution, but you could even contribute your work back to the community to help others facing the same issue.

Final Recommendation #

Unless your project has an extremely specific, un-migratable dependency on 1.x code that can’t be replaced or rewritten, go with Fabric 2.0 (or the latest stable 2.x release). The long-term benefits of security, official support, and improved features far outweigh the short-term convenience of using existing 1.x resources.

If you’re stuck on migrating a specific piece of code, feel free to share more details about what those 1.x repositories do—this community can help you map out the best path forward.

内容的提问来源于stack exchange，提问作者Kate