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 #Amethyst v0.83.1: NIP-44v2 DMs are up!

New Features
- Moves DMs to the audited NIP-44v2
- Adds support for NIP-31 alt tags
- Adds a k-tag to reactions
- Adds i18n for error messages when uploading images

Performance Improvements: 
- Improves the performance of Robohash
- Add less memory-intensive timeAgo calculations and translations
- Uses primitives instead of the wrapped object in several places
- Moves to a less memory-intensive way to write and send filters to the server.
- Refines recompositions of routes and bottom icons
- Avoids the creation of new sets when looping through cached maps of User and Notes
- Avoids recreating the EOSE array when changing filters
- Reuses SessionToken for all Playback connections
- Improving the memory use of concurrent hashmaps and immutable collections
- Reduces the use of remember for fixed UI modifiers

Bugfixes: 
- Detects URL mime-types by pinging the server instead of relying on the url's extension
- Fixes bug with cropped joinToString assemblies of relay filters 
- Avoids Concurrent Modification Exception on the EOSE markups 
- Forces nip95 to be under 80Kb to make sure relays can receive it
- Fixes bug that error messages wouldn't show an error when uploading images to the reels page
- Fixes post video dimensions when the user has selected not to load videos automatically
- Updates dependencies

Updated translations: 
- Chinese by @ra5pvt1n 
- Finnish by @petri
- Hungarian by @Zoltan
- Dutch by @Bartus
- Tamil by @Turiz

Download:
- [Play Edition](https://github.com/vitorpamplona/amethyst/releases/download/v0.83.1/amethyst-googleplay-universal-v0.83.1.apk )
- [FOSS Edition - No translations](https://github.com/vitorpamplona/amethyst/releases/download/v0.83.1/amethyst-fdroid-universal-v0.83.1.apk ) 
 Why does this still come up?
https://i.nostr.build/qRAv.jpg#m=image%2Fjpeg&dim=1079x697&blurhash=r56*5%2BI*r%7CI%2BR%24s%3DD%7DxKI%2Bnp9p%3F1NWxvt8ND%24-NXRREH-ZI%2CxvogRhxcR%23%3F1NWoOR%24WUj%5DR%24oNWS%254WAaxj%5BayoMR%25oMaxWmxcR%24oMWAaxogWTf8&x=57572c575622a7df1a9813cba6207b35777257a2dc800ffb8fa9a48cda008fae 
 What do you mean? The url is always part of the post.  
 The extra hashtags? 
 It will be there. It helps with previews and to make sure server doesn't modify the image after the author has approved.  
 Like that 
 Bonjour Vitor en fait je me permets de vous faire remonter que la plupart des clients Damus ont un soucis de traduction  pour les notes surtout en français.. Travaillez vous ensemble ? Puisque certains utilisateurs passent à côté de certaines qu'ils peuvent traduire.. Lorsqu'on me le signale je traduis mais quand même c'est plus prioritaire dans les interactions sociales j'imagine certains qui ne lisent pas de notes car bloquent au niveau traduction'.. Au niveau Amethyst il n'y a pas de soucis peut-être @jb55 devrait interroger les utilisateurs.., il m'arrive de traduire régulièrement entre pairs  
 nostr:nevent1qqs2e495qcf8ydu3sc756euhhrsy9unlknyu6xjld89w3r4mvcxxuucpzpmhxue69uhkummnw3ezuamfdejsygzxpsj7dqha57pjk5k37gkn6g4nzakewtmqmnwryyhd3jfwlpgxtspsgqqqqqqs26k58r 
 Swahili * :) 
 Thanks man! I think most ppl who have used variety of nostr clients can agree that amethyst has the best user experience.  
 Do any other clients support this, or are you first again? 🚀 
 Only us for now. But Gossip, Coracle and 0xChat are working on it.  
 nostr:nevent1qqs2e495qcf8ydu3sc756euhhrsy9unlknyu6xjld89w3r4mvcxxuucpz4mhxue69uhhyetvv9ujumt0wd68ytnsw43qygzxpsj7dqha57pjk5k37gkn6g4nzakewtmqmnwryyhd3jfwlpgxtspsgqqqqqqs5p57zm 
 Always shipping features and bug fixes like a boss!
Time to update amethyst again. BRB! 
nostr:nevent1qqs2e495qcf8ydu3sc756euhhrsy9unlknyu6xjld89w3r4mvcxxuucpz3mhxue69uhhyetvv9ujuerpd46hxtnfdupzq3svyhng9ld8sv44950j957j9vchdktj7cxumsep9mvvjthc2pjuqvzqqqqqqylyn5jx 
 I didn't understand the new nip-44 feature.
What advantages does it have? 
 It's just an encryption upgrade for DMs. It's now audited.  
 "Encryption, because it's audited" is like "Brawndo, it's got electrolytes" 
 💪🏿💪🏿💪🏿 
 Do you have a link to the diff of v2? 
 People want to forget v1 existed so there is no good doc to show. But essentially, v2 fixed some issues with message length (smaller messages would yield smaller encrypted bytes, which is not ideal). We also got rid XChaCha because it is not standardized and the added protections aren't needed inside Nostr messages.  

v1: XChaCha20 with sha256(parity + ecdh) as a shared key per conversation
v2:  secp256k1 ECDH, HKDF, padding, ChaCha20, HMAC-SHA256, base64

v1: https://github.com/coracle-social/nips/blob/7f98a7b8849c16f9d324e0ea15db4efda0ee84fb/44.md
v2: https://github.com/nostr-protocol/nips/blob/master/44.md 
 Thanks!! 

What happens if a NIP44 (v1 or v2) message gets sent to a legacy NIP4 receiver? Does that client handle it?  
 No. The encryption is not backwards compatible so each other client will have to decide to support it or not.  
 And this replaces the giftwraps which were previously implemented in Amethyst Incognito DMs?  
 Ah, giftwraps is NIP24, and that's still there in the latest Amethyst. 

So, what's the new thing for DMs?  
 Nip44 is used by GiftWraps, which is used by nip 24. :) 
 Of course, that makes sense! 
Nipception 
 How are you checking the MIME type by pinging the server? 
 I check for opengraph's info for preview cards in every url. Thus, I end up hitting the server even for images and videos. When that happens, you also receive the content-type of the file in the HTTP header. I use that to determine how to render the media. 

I still check extensions first, but that has proven to be problematic (some image servers serve different formats, other urls have query params that affect the discovery and many don't actually offer extensions at all).  
 Cool. I wasnt sure if there was another trick besides OpenGraph. Thats what we use in Nos, but it’s slow and causes the cells to change size which makes scrolling less comfortable. 
 The only way to trully solve this is to either have a server that can provide image sizes or download everything before showing on the feed. There are hacks like the imeta tag or nip54, but those depend entirely in the writer client including them, which is not ideal for the receiving client.

 https://github.com/nostr-protocol/nips/pull/521 
 Scrolling seems to be quite a bit smoother after this update. 🤘 
 Images are all blury 
 早速DM部分に改修入れてるのね〜!

nostr:nevent1qqs2e495qcf8ydu3sc756euhhrsy9unlknyu6xjld89w3r4mvcxxuucpp4mhxue69uhkummn9ekx7mqzyprqcf0xst760qet2tglytfay2e3wmvh9asdehpjztkceyh0s5r9cqcyqqqqqqgacqmyr 
 nostr:nevent1qqs2e495qcf8ydu3sc756euhhrsy9unlknyu6xjld89w3r4mvcxxuucx9rnlh