blog

A better previewnet developer experience

March 15, 2022
Hedera Team
Hedera
Hedera provides secure, scalable infrastructure for real-world decentralized applications in finance, AI, and sustainability, governed by global enterprises.

Hedera launched the previewnet in June 2020 to provide early access to Hedera codebase features and functionality, prior to their release on the Hedera testnet and mainnet. We’ve seen a number of developers tinker around on previewnet but hoped to increase that metric by improving the previewnet experience for developers.

Through feedback received, the core team has decided to make a change in conjunction with today’s previewnet upgrade to make a best-effort to preserve the previewnet state during a release cycle. With this change, we hope even more developers take advantage of the opportunity to try out upcoming features on Hedera.

Please keep in mind that previewnet is running a codebase still under active development. It’s not always stable and accounts / data can still be lost when the network codebase is upgraded.

Best-effort preservation of state during release cycles

In the past, the previewnet state was reset every pre-release and patch release deployed during a release cycle; due to previewnet being inherently less stable and running a codebase that’s still under development, these upgrades happened adhoc. This made it difficult for application developers to try upcoming features — it was uncertain when their application’s state would be purged and they would have to rebuild.

Moving forward, the team has decided to perform best-effort upgrades of the existing state during every pre-release and patch release deployed to the previewnet during a release cycle. This means that you’ll now have more time to test new features on previewnet without having to rebuild your application at an irregular cadence.

Have feedback?

We’re always looking for feedback from developers building on Hedera. Of course, if you have an ecosystem standard proposal or changes you’d like to see in the open source Hedera Services codebase, we encourage you to submit a HIP. If you’re looking to provide any incremental feedback on the developer experience, please check out the #developer-feedback channel in the Hedera developer discord.

Back to Blog

discover

See more articles

FRNT live on Hedera
March 12, 2026

Wyoming Frontier Stable Token (FRNT) now live on Hedera

Wyoming’s Frontier Stable Token (FRNT), the first U.S. state-issued stable token, is now live on Hedera. Tokens have been minted on the Hedera EVM, as announced in the Wyoming Stable
Read More
March 12, 2026

Hedera integrates USDT0 for crosschain stablecoin liquidity

USDT0, the omnichain deployment of Tether’s USDT, is now live on Hedera. This integration brings native, frictionless stablecoin liquidity to the Hedera ecosystem, with no wrapped tokens, no synthetic assets,
Read More
March 10, 2026

Hiero Local Node Deprecation: 6-Month Transition to Solo

Hiero Local Node is being deprecated with a 6-month transition window. Developers using Local Node for local testing or CI workflows should begin planning their migration. The path forward is
Read More