# May 24, 2021 - weekly forum update
**URL:** https://forum.zcashcommunity.com/t/may-24-2021-weekly-forum-update/39317
**Category:** Weekly Forum Updates
**Created:** [May 21, 2021, 9:18pm UTC](https://forum.zcashcommunity.com/t/may-24-2021-weekly-forum-update/39317 "2021-05-21T21:18:54Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@elenita](https://forum.zcashcommunity.com/u/elenita)
#### Post date: [May 21, 2021, 9:18pm UTC](https://forum.zcashcommunity.com/t/may-24-2021-weekly-forum-update/39317/1 "2021-05-21T21:18:54Z")
A few days later than usual, but here are your weekly Zcash updates (from last week):
- TOMORROW, May 25: Zeal Call with special guest Julia Angwin. Subscribe to [ECC’s Youtube](https://www.youtube.com/watch?v=xNluW2Ps7OI) channel for the latest updates and new content. Check out their latest story on [differential privacy in US Census data](https://themarkup.org/ask-the-markup/2021/05/11/will-new-privacy-changes-protect-census-data-or-make-things-worse).
- Zcash [updated metrics are here](https://electriccoin.co/zcash-metrics/) - including shielded pool size, payments and transaction volume.
- There were two big headlines last week in terms of Zcash support for payments: 1) Zcash is now supported by [Moon](https://medium.com/paywithmoon/moon-adds-support-for-zcash-b7f698fe408f), which means you can now spend your Zcash wherever Visa is accepted. 2) [Flexa is partnering with Citcon](https://medium.com/flexa/citcon-partners-with-flexa-to-bring-digital-currency-payments-to-merchants-worldwide-6d18ccf96904), a global payments processor for over 6000 prestigious brands and merchants. Zcash is supported on Flexa.
- Ying Tong presented at zkSessions on UltraPLONK Arithmetization. [Recording here](https://www.youtube.com/watch?v=K6m-yCctbx0). Check it out and learn about Circuits, Gadgets, Chips, and Layouters!
- New team members: [ZF welcomes a new core engineer](https://www.zfnd.org/blog/welcome-janito/). Welcome Janito. ECC welcomes a new Developer Relations lead. Welcome Wil!
Mark your [calendars](https://electriccoin.co/events/) -
- Catch ECC speakers at the [Consensus Conference](https://www.coindesk.com/events/consensus-2021) this week (Mar 24 - 27).
- June 8 & 9: ZF has announced the agenda for [ZCon2 Lite - Privacy all the way down](https://electriccoin.co/event/zcon2/). All of the scheduled streams are up on [ZF’s Youtube channel](https://www.youtube.com/playlist?list=PL40dyJ0UYTLLa68H9ibpiSZqeevqKizg4).
DevInfra
- Docker workshop complete, scheduling for the team in the next few weeks.
- Collected feedback internally regarding CI systems.
Security
- Productive week! Closed 30 (!!!) tickets including a couple of disclosures, both disclosed in public tickets [here](https://github.com/zcash/zcash/issues/5168) and [here](https://github.com/zcash/librustzcash/issues/384).
Core
- [Implemented](https://github.com/zcash/librustzcash/pull/383) F4Jumble which is needed for Unified Addresses. F4Jumble improves robustness against address substitution attacks
- Published a new version of the [protocol specification](https://zips.z.cash/protocol/nu5.pdf) (2021.2.2) which includes minor corrections.
- [Updated ECC gadget](https://github.com/zcash/orchard/pull/75) to work with the major Chip refactor
- Made [small](https://github.com/zcash/halo2/pull/268) [improvements](https://github.com/zcash/halo2/pull/261) to Halo 2 developer tooling (MockProver)
- We have a [PR](https://github.com/zcash/halo2/pull/270) up for integrating the security proof into the Halo 2 book
Wallet
- Shipped [iOS version 108](https://github.com/zcash/zcash-ios-wallet) and SDK version 0.11.0,
- [ECC iOS demo wallet](https://github.com/zcash/ZcashLightClientKit/tree/master/Example/ZcashLightClientSample) now includes t-address support, auto-shield funds, transparent balance, Z-\>T restore correctly, “unified viewing keys”
- Finalized error messaging methodology for improved error handling
- Rewind API more robust for short rescans
- gRPC-Swift updated to 1.0.0,
- PR for [Lightwalletd](https://github.com/zcash/lightwalletd) to be able to serve blocks in reverse order.
Enjoy the week ahead!
---
### Author:  [@Autotunafish](https://forum.zcashcommunity.com/u/Autotunafish)
#### Post date: [May 25, 2021, 12:36am UTC](https://forum.zcashcommunity.com/t/may-24-2021-weekly-forum-update/39317/2 "2021-05-25T00:36:27Z")
Bump, Zeal call tomorrow 🦓