add meeting notes for Apr 13, 2023

meetings/2023-04-13.md

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+
+# Apr 13, 2023
+
+* First fully open/public meeting 🎉
+
+* Code coverage feature shipping in CLI 🎉
+
+    * Huge shoutout to Ardit Marku from Build Squad
+
+* New contributor: darkdrag00nv2 🎉
+
+* Contribute:
+    * FLIPs
+
+    * Cadence: [https://github.com/onflow/cadence/issues?q=is%3Aissue+is%3Aopen+sort%3Aupdated-desc+label%3A%22Good+First+Issue%22](https://github.com/onflow/cadence/issues?q=is%3Aissue+is%3Aopen+sort%3Aupdated-desc+label%3A%22Good+First+Issue%22)
+
+    * Cadence tools: [https://github.com/onflow/cadence-tools/issues?q=is%3Aissue+is%3Aopen+sort%3Aupdated-desc+label%3A%22Good+First+Issue%22](https://github.com/onflow/cadence-tools/issues?q=is%3Aissue+is%3Aopen+sort%3Aupdated-desc+label%3A%22Good+First+Issue%22)
+
+## FLIPs
+
+### AuthAccount capabilities
+
+* [https://github.com/onflow/flips/pull/53](https://github.com/onflow/flips/pull/53)
+* Status
+    * Approved and implemented 🎉
+
+### Capability Controllers
+
+* FLIP: [https://github.com/onflow/flow/pull/798](https://github.com/onflow/flow/pull/798)
+
+* Status:
+
+    * Had many breakout sessions
+
+    * Final API discussions
+
+    * Implementation in progress
+
+    * No remaining concerns
+
+* Open problems:
+
+    * API: Capability publishing
+
+* Next steps:
+
+    * One more breakout session
+
+    * **Vote!**
+
+### Entitlements and Safe Downcasting
+
+* FLIP: [https://github.com/onflow/flips/pull/54](https://github.com/onflow/flips/pull/54)
+
+* Status:
+
+    * Had breakout session for nested entitlements. Consensus on solution
+
+    * Implementation in progress
+
+    * No remaining concerns
+
+* Open problems:
+
+    * Attachments
+
+* Next steps:
+
+    * Address remaining technical issues async
+
+    * **Vote!**
+
+### Attachments
+
+* Attachments FLIP: [https://github.com/onflow/flips/pull/11](https://github.com/onflow/flips/pull/11)
+
+* Forum discussion: [https://forum.onflow.org/t/flip-cadence-extensions-attachments/3645/2](https://forum.onflow.org/t/flip-cadence-extensions-attachments/3645/2)
+
+* Status:
+
+    * Approved and merged 🎉
+
+    * Deployed to Testnet
+
+    * Receiving feedback
+
+    * Discovering use-cases
+
+    * Need mitigation for trolling attack
+
+    * Mainnet blocked on solution for trolling attack
+
+    * Had breakout session for trolling attack
+
+    * Have idea for solution, but might depend on breaking change (Stable Cadence)
+
+* Open problem:
+
+    * Trolling attack
+
+* Next steps:
+
+    * Address trolling attack
+
+    * Need breakout session
+
+### Interface Inheritance
+
+* FLIP: [https://github.com/onflow/flips/pull/40](https://github.com/onflow/flips/pull/40)
+
+* Forum discussion: [https://forum.onflow.org/t/flip-interface-inheritance-in-cadence/3750](https://forum.onflow.org/t/flip-interface-inheritance-in-cadence/3750)
+
+* Status:
+
+    * Was on hold due to prioritization, planning to continue now, given other FLIPs done
+
+    * Had breakout session
+
+    * Implementation available
+
+* Open questions:
+
+    * Multiple interface default functions (diamond problem)
+
+    * Meeting notes: [https://docs.google.com/document/d/1LUvRg0T09mdE2Ndgti6xI1AY_KPYGJr2ZRLVuqzGxFg/edit#heading=h.d4wc1pr484vi](https://docs.google.com/document/d/1LUvRg0T09mdE2Ndgti6xI1AY_KPYGJr2ZRLVuqzGxFg/edit#heading=h.d4wc1pr484vi)
+
+* Next steps:
+
+    * Schedule another breakout session
+
+    * Is this still a blocker for NFT/FT v2?
+
+        * Still being used, expected to be available
+
+        * Not 100% required, but preferred. Less prone to errors
+
+### Extend transaction format
+
+* FLIP: [https://github.com/onflow/flips/pull/41](https://github.com/onflow/flips/pull/41)
+
+* Status:
+
+    * No updates at the moment
+
+    * Last breakout session was a while back
+
+    * Planning to restart working group
+
+* Open problems:
+
+    * Unexplored corner:
+
+        * Useful for multi-sign use-cases
+
+        * Does model also make sense for single-sign use-cases?
+
+    * Signer assignment
+
+        * Mapping signatures to roles
+
+        * Currently Flow transaction signatures are sequential
+
+    * Action-based model?
+
+* Next steps:
+
+    * Have another breakout session
+
+### External Mutability
+
+* [https://github.com/onflow/flips/pull/58](https://github.com/onflow/flips/pull/58)
+
+* [https://github.com/onflow/flips/pull/59](https://github.com/onflow/flips/pull/59)
+
+* Status
+
+    * Had breakout session
+
+    * Multiple alternatives / FLIPs
+
+    * FLIP 58:
+
+        * Add additional static checks
+
+        * Deemed overkill
+
+    * FLIP 59:
+
+        * Remove/restrict let fields
+
+        * Deemed better than 58
+
+        * Impact analysis:
+
+            * Inner mutability used as a feature
+
+            * E.g. MetadataViews standard
+
+            * Need delegation functions for nested members
+
+            * More boilerplate
+
+            * Moves problem, but does not solve it
+
+    * Investigating another idea (entitlements, references to fields)
+
+* Open problems:
+
+    * Usability
+
+        * FLIPs have different compromises
+
+* Next steps:
+
+    * Breakout session to determine how to proceed
+
+## Related FLIPs
+
+### Account linking standard
+
+* FLIP: [https://github.com/onflow/flips/pull/72](https://github.com/onflow/flips/pull/72)
+
+* Status:
+
+    * Had breakout session
+
+    * Great feedback
+
+    * Implementation in progress:
+
+        * [https://github.com/Flowtyio/restricted-child-account](https://github.com/Flowtyio/restricted-child-account)
+
+    * Positive sentiment, thumbs up from e.g. Flowty, Niftory, Dapper, etc
+
+    * Wallets like it, even though it is more work for them
+
+* Open problem:
+
+    * Regulatory risk for application developers
+
+        * Discussions with legal council, technical solution
+
+    * Discovery of linked assets
+
+* Next steps:
+
+    * Work out how to restrict access
+
+    * Continue implementation
+
+### FT/NFT v2 standards
+
+* FLIP: [https://github.com/onflow/flips/pull/56](https://github.com/onflow/flips/pull/56)
+
+* Status:
+
+    * Multiple breakout sessions
+
+    * Several major changes:
+
+        * [https://github.com/onflow/flow-nft/pull/126#issuecomment-1505864702](https://github.com/onflow/flow-nft/pull/126#issuecomment-1505864702)
+
+* Open problems:
+
+    * Waiting on FLIP for emitting events from interfaces (would allow nested type requirements)
+
+        * [https://github.com/onflow/cadence/issues/2069](https://github.com/onflow/cadence/issues/2069)
+
+        * Need to open FLIP for removal of nested type requirements
+
+    * Upgrade constraints
+
+* Next steps:
+
+    * Breakout session for upgrade
+
+        * Maybe needs storage migration
+
+    * Open FLIP for removal of nested type requirements
+
+## Questions
+
+* Changelog for Stable Cadence?
+
+    * Announcement of breaking changes Stable Cadence in forum
+
+    * [https://forum.onflow.org/t/another-update-on-stable-cadence/3715](https://forum.onflow.org/t/another-update-on-stable-cadence/3715)
+
+    * Preview release available, needs to be updated
+
+    * Will create TN instance with changes