# Building a private, on-chain, implementation for RetroPGF

**URL:** <https://gov.optimism.io/t/building-a-private-on-chain-implementation-for-retropgf/7733>\
**Category:** Retro  Funding Missions\
**Tags:** feedback\
**Created:** [February 28, 2024, 9:05pm UTC](https://gov.optimism.io/t/building-a-private-on-chain-implementation-for-retropgf/7733 "2024-02-28T21:05:37Z")\
**Posts on this page:** 1\
**Showing post:** 8

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**Author:** ![samajammin](https://dub1.discourse-cdn.com/bc41dd/user_avatar/gov.optimism.io/samajammin/32/8242_2.png) [@samajammin](https://gov.optimism.io/u/samajammin)\
**Post date:** [April 2, 2024, 8:31pm UTC](https://gov.optimism.io/t/building-a-private-on-chain-implementation-for-retropgf/7733/8 "2024-04-02T20:31:08Z")

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Hey folks! For those interested in kicking the tires on this stack, we just deployed a testnet round that’s ready for you to play around with. See instructions here:

> <https://twitter.com/zkMACI/status/1775245089675383103?s=20>
>
> samrichards.eth @samonchain

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_[View the full topic](https://gov.optimism.io/t/building-a-private-on-chain-implementation-for-retropgf/7733)._