Adds support for NIP-35 torrents and their comments

amethyst/src/main/java/com/vitorpamplona/amethyst/model/Account.kt

@@ -102,6 +102,7 @@ import com.vitorpamplona.quartz.events.SearchRelayListEvent
 import com.vitorpamplona.quartz.events.StatusEvent
 import com.vitorpamplona.quartz.events.TextNoteEvent
 import com.vitorpamplona.quartz.events.TextNoteModificationEvent
+import com.vitorpamplona.quartz.events.TorrentCommentEvent
 import com.vitorpamplona.quartz.events.WrappedEvent
 import com.vitorpamplona.quartz.events.ZapSplitSetup
 import com.vitorpamplona.quartz.signers.NostrSigner
@@ -1796,6 +1797,78 @@ class Account(
         }
     }
 
+    fun sendTorrentComment(
+        message: String,
+        replyTo: List<Note>?,
+        mentions: List<User>?,
+        zapReceiver: List<ZapSplitSetup>? = null,
+        wantsToMarkAsSensitive: Boolean,
+        zapRaiserAmount: Long? = null,
+        replyingTo: String?,
+        root: String,
+        directMentions: Set<HexKey>,
+        forkedFrom: Event?,
+        relayList: List<RelaySetupInfo>? = null,
+        geohash: String? = null,
+        nip94attachments: List<FileHeaderEvent>? = null,
+        draftTag: String?,
+    ) {
+        if (!isWriteable()) return
+
+        val repliesToHex = replyTo?.filter { it.address() == null }?.map { it.idHex }
+        val mentionsHex = mentions?.map { it.pubkeyHex }
+        val addresses = replyTo?.mapNotNull { it.address() } ?: emptyList()
+
+        TorrentCommentEvent.create(
+            message = message,
+            replyTos = repliesToHex,
+            mentions = mentionsHex,
+            zapReceiver = zapReceiver,
+            markAsSensitive = wantsToMarkAsSensitive,
+            zapRaiserAmount = zapRaiserAmount,
+            replyingTo = replyingTo,
+            torrent = root,
+            directMentions = directMentions,
+            geohash = geohash,
+            nip94attachments = nip94attachments,
+            forkedFrom = forkedFrom,
+            signer = signer,
+            isDraft = draftTag != null,
+        ) {
+            if (draftTag != null) {
+                if (message.isBlank()) {
+                    deleteDraft(draftTag)
+                } else {
+                    DraftEvent.create(draftTag, it, signer) { draftEvent ->
+                        val newRelayList = getPrivateOutboxRelayList()?.relays()
+                        if (newRelayList != null) {
+                            Client.sendPrivately(draftEvent, newRelayList)
+                        } else {
+                            Client.send(draftEvent, relayList = relayList)
+                        }
+                        LocalCache.justConsume(draftEvent, null)
+                    }
+                }
+            } else {
+                Client.send(it, relayList = relayList)
+                LocalCache.justConsume(it, null)
+
+                // broadcast replied notes
+                replyingTo?.let {
+                    LocalCache.getNoteIfExists(replyingTo)?.event?.let {
+                        Client.send(it, relayList = relayList)
+                    }
+                }
+                replyTo?.forEach { it.event?.let { Client.send(it, relayList = relayList) } }
+                addresses?.forEach {
+                    LocalCache.getAddressableNoteIfExists(it.toTag())?.event?.let {
+                        Client.send(it, relayList = relayList)
+                    }
+                }
+            }
+        }
+    }
+
     fun deleteDraft(draftTag: String) {
         val key = DraftEvent.createAddressTag(userProfile().pubkeyHex, draftTag)
         LocalCache.getAddressableNoteIfExists(key)?.let { note ->

amethyst/src/main/java/com/vitorpamplona/amethyst/model/LocalCache.kt

@@ -114,6 +114,8 @@ import com.vitorpamplona.quartz.events.SearchRelayListEvent
 import com.vitorpamplona.quartz.events.StatusEvent
 import com.vitorpamplona.quartz.events.TextNoteEvent
 import com.vitorpamplona.quartz.events.TextNoteModificationEvent
+import com.vitorpamplona.quartz.events.TorrentCommentEvent
+import com.vitorpamplona.quartz.events.TorrentEvent
 import com.vitorpamplona.quartz.events.VideoHorizontalEvent
 import com.vitorpamplona.quartz.events.VideoVerticalEvent
 import com.vitorpamplona.quartz.events.WikiNoteEvent
@@ -463,6 +465,61 @@ object LocalCache {
         refreshObservers(note)
     }
 
+    fun consume(
+        event: TorrentEvent,
+        relay: Relay?,
+    ) {
+        val note = getOrCreateNote(event.id)
+        val author = getOrCreateUser(event.pubKey)
+
+        if (relay != null) {
+            author.addRelayBeingUsed(relay, event.createdAt)
+            note.addRelay(relay)
+        }
+
+        // Already processed this event.
+        if (note.event != null) return
+
+        if (antiSpam.isSpam(event, relay)) {
+            return
+        }
+
+        note.loadEvent(event, author, emptyList())
+
+        refreshObservers(note)
+    }
+
+    fun consume(
+        event: TorrentCommentEvent,
+        relay: Relay?,
+    ) {
+        val note = getOrCreateNote(event.id)
+        val author = getOrCreateUser(event.pubKey)
+
+        if (relay != null) {
+            author.addRelayBeingUsed(relay, event.createdAt)
+            note.addRelay(relay)
+        }
+
+        // Already processed this event.
+        if (note.event != null) return
+
+        if (antiSpam.isSpam(event, relay)) {
+            return
+        }
+
+        val replyTo = computeReplyTo(event)
+
+        note.loadEvent(event, author, replyTo)
+
+        // Counts the replies
+        replyTo.forEach {
+            it.addReply(note)
+        }
+
+        refreshObservers(note)
+    }
+
     fun consume(
         event: NIP90ContentDiscoveryResponseEvent,
         relay: Relay? = null,
@@ -795,6 +852,8 @@ object LocalCache {
                     .tagsWithoutCitations()
                     .filter { it != event.activity()?.toTag() }
                     .mapNotNull { checkGetOrCreateNote(it) }
+            is TorrentCommentEvent ->
+                event.tagsWithoutCitations().mapNotNull { checkGetOrCreateNote(it) }
 
             is DraftEvent -> {
                 event.mapTaggedEvent { checkGetOrCreateNote(it) } + event.mapTaggedAddress { checkGetOrCreateAddressableNote(it) }
@@ -1303,6 +1362,10 @@ object LocalCache {
             getChannelIfExists(it.toTag())?.removeNote(deleteNote)
         }
 
+        (deletedEvent as? TorrentCommentEvent)?.torrent()?.let {
+            getNoteIfExists(it)?.removeReply(deleteNote)
+        }
+
         if (deletedEvent is PrivateDmEvent) {
             val author = deleteNote.author
             val recipient =
@@ -2664,6 +2727,8 @@ object LocalCache {
                 is StatusEvent -> consume(event, relay)
                 is TextNoteEvent -> consume(event, relay)
                 is TextNoteModificationEvent -> consume(event, relay)
+                is TorrentEvent -> consume(event, relay)
+                is TorrentCommentEvent -> consume(event, relay)
                 is VideoHorizontalEvent -> consume(event, relay)
                 is VideoVerticalEvent -> consume(event, relay)
                 is WikiNoteEvent -> consume(event, relay)

amethyst/src/main/java/com/vitorpamplona/amethyst/service/NostrSingleEventDataSource.kt

@@ -42,6 +42,7 @@ import com.vitorpamplona.quartz.events.ReportEvent
 import com.vitorpamplona.quartz.events.RepostEvent
 import com.vitorpamplona.quartz.events.TextNoteEvent
 import com.vitorpamplona.quartz.events.TextNoteModificationEvent
+import com.vitorpamplona.quartz.events.TorrentCommentEvent
 
 object NostrSingleEventDataSource : AmethystNostrDataSource("SingleEventFeed") {
     private var nextEventsToWatch = setOf<Note>()
@@ -179,6 +180,7 @@ object NostrSingleEventDataSource : AmethystNostrDataSource("SingleEventFeed") {
                                         DeletionEvent.KIND,
                                         NIP90ContentDiscoveryResponseEvent.KIND,
                                         NIP90StatusEvent.KIND,
+                                        TorrentCommentEvent.KIND,
                                     ),
                                 tags = mapOf("e" to it.map { it.idHex }),
                                 since = findMinimumEOSEs(it),

amethyst/src/main/java/com/vitorpamplona/amethyst/service/NostrUserProfileDataSource.kt

@@ -42,6 +42,8 @@ import com.vitorpamplona.quartz.events.PollNoteEvent
 import com.vitorpamplona.quartz.events.ProfileGalleryEntryEvent
 import com.vitorpamplona.quartz.events.RepostEvent
 import com.vitorpamplona.quartz.events.TextNoteEvent
+import com.vitorpamplona.quartz.events.TorrentCommentEvent
+import com.vitorpamplona.quartz.events.TorrentEvent
 import com.vitorpamplona.quartz.events.WikiNoteEvent
 
 object NostrUserProfileDataSource : AmethystNostrDataSource("UserProfileFeed") {
@@ -89,6 +91,23 @@ object NostrUserProfileDataSource : AmethystNostrDataSource("UserProfileFeed") {
             )
         }
 
+    fun createUserPostsFilter2() =
+        user?.let {
+            TypedFilter(
+                types = COMMON_FEED_TYPES,
+                filter =
+                    SincePerRelayFilter(
+                        kinds =
+                            listOf(
+                                TorrentEvent.KIND,
+                                TorrentCommentEvent.KIND,
+                            ),
+                        authors = listOf(it.pubkeyHex),
+                        limit = 20,
+                    ),
+            )
+        }
+
     fun createUserReceivedZapsFilter() =
         user?.let {
             TypedFilter(
@@ -188,6 +207,7 @@ object NostrUserProfileDataSource : AmethystNostrDataSource("UserProfileFeed") {
             listOfNotNull(
                 createUserInfoFilter(),
                 createUserPostsFilter(),
+                createUserPostsFilter2(),
                 createProfileGalleryFilter(),
                 createFollowFilter(),
                 createFollowersFilter(),

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/actions/NewPostViewModel.kt

@@ -69,6 +69,8 @@ import com.vitorpamplona.quartz.events.GitIssueEvent
 import com.vitorpamplona.quartz.events.Price
 import com.vitorpamplona.quartz.events.PrivateDmEvent
 import com.vitorpamplona.quartz.events.TextNoteEvent
+import com.vitorpamplona.quartz.events.TorrentCommentEvent
+import com.vitorpamplona.quartz.events.TorrentEvent
 import com.vitorpamplona.quartz.events.ZapSplitSetup
 import com.vitorpamplona.quartz.events.findURLs
 import kotlinx.coroutines.CancellationException
@@ -681,6 +683,74 @@ open class NewPostViewModel : ViewModel() {
                 nip94attachments = usedAttachments,
                 draftTag = localDraft,
             )
+        } else if (originalNote?.event is TorrentCommentEvent) {
+            val originalNoteEvent = originalNote?.event as TorrentCommentEvent
+            // adds markers
+            val rootId =
+                originalNoteEvent.torrent() // if it has a marker as root
+                    ?: originalNote
+                        ?.replyTo
+                        ?.firstOrNull { it.event != null && it.replyTo?.isEmpty() == true }
+                        ?.idHex // if it has loaded events with zero replies in the reply list
+                    ?: originalNote?.replyTo?.firstOrNull()?.idHex // old rules, first item is root.
+                    ?: originalNote?.idHex
+
+            if (rootId != null) {
+                // There must be a torrent ID
+                val replyId = originalNote?.idHex
+
+                val replyToSet =
+                    if (forkedFromNote != null) {
+                        (listOfNotNull(forkedFromNote) + (tagger.eTags ?: emptyList())).ifEmpty { null }
+                    } else {
+                        tagger.eTags
+                    }
+
+                account?.sendTorrentComment(
+                    message = tagger.message,
+                    replyTo = replyToSet,
+                    mentions = tagger.pTags,
+                    zapReceiver = zapReceiver,
+                    wantsToMarkAsSensitive = wantsToMarkAsSensitive,
+                    zapRaiserAmount = localZapRaiserAmount,
+                    replyingTo = replyId,
+                    root = rootId,
+                    directMentions = tagger.directMentions,
+                    forkedFrom = forkedFromNote?.event as? Event,
+                    relayList = relayList,
+                    geohash = geoHash,
+                    nip94attachments = usedAttachments,
+                    draftTag = localDraft,
+                )
+            }
+        } else if (originalNote?.event is TorrentEvent) {
+            val originalNoteEvent = originalNote?.event as TorrentEvent
+            // adds markers
+            val rootId = originalNoteEvent.id
+
+            val replyToSet =
+                if (forkedFromNote != null) {
+                    (listOfNotNull(forkedFromNote) + (tagger.eTags ?: emptyList())).ifEmpty { null }
+                } else {
+                    tagger.eTags
+                }
+
+            account?.sendTorrentComment(
+                message = tagger.message,
+                replyTo = replyToSet,
+                mentions = tagger.pTags,
+                zapReceiver = zapReceiver,
+                wantsToMarkAsSensitive = wantsToMarkAsSensitive,
+                zapRaiserAmount = localZapRaiserAmount,
+                replyingTo = null,
+                root = rootId,
+                directMentions = tagger.directMentions,
+                forkedFrom = forkedFromNote?.event as? Event,
+                relayList = relayList,
+                geohash = geoHash,
+                nip94attachments = usedAttachments,
+                draftTag = localDraft,
+            )
         } else {
             if (wantsPoll) {
                 account?.sendPoll(

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/dal/UserProfileConversationsFeedFilter.kt

@@ -28,6 +28,7 @@ import com.vitorpamplona.quartz.events.ChannelMessageEvent
 import com.vitorpamplona.quartz.events.LiveActivitiesChatMessageEvent
 import com.vitorpamplona.quartz.events.PollNoteEvent
 import com.vitorpamplona.quartz.events.TextNoteEvent
+import com.vitorpamplona.quartz.events.TorrentCommentEvent
 
 class UserProfileConversationsFeedFilter(
     val user: User,
@@ -59,7 +60,8 @@ class UserProfileConversationsFeedFilter(
                 it.event is TextNoteEvent ||
                     it.event is PollNoteEvent ||
                     it.event is ChannelMessageEvent ||
-                    it.event is LiveActivitiesChatMessageEvent
+                    it.event is LiveActivitiesChatMessageEvent ||
+                    it.event is TorrentCommentEvent
             ) &&
             !it.isNewThread() &&
             account.isAcceptable(it)

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/dal/UserProfileNewThreadFeedFilter.kt

@@ -35,6 +35,7 @@ import com.vitorpamplona.quartz.events.LongTextNoteEvent
 import com.vitorpamplona.quartz.events.PollNoteEvent
 import com.vitorpamplona.quartz.events.RepostEvent
 import com.vitorpamplona.quartz.events.TextNoteEvent
+import com.vitorpamplona.quartz.events.TorrentEvent
 import com.vitorpamplona.quartz.events.WikiNoteEvent
 
 class UserProfileNewThreadFeedFilter(
@@ -73,7 +74,8 @@ class UserProfileNewThreadFeedFilter(
                     it.event is PollNoteEvent ||
                     it.event is HighlightEvent ||
                     it.event is AudioTrackEvent ||
-                    it.event is AudioHeaderEvent
+                    it.event is AudioHeaderEvent ||
+                    it.event is TorrentEvent
             ) &&
             it.isNewThread() &&
             account.isAcceptable(it)

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/note/NoteCompose.kt

@@ -112,6 +112,8 @@ import com.vitorpamplona.amethyst.ui.note.types.RenderReaction
 import com.vitorpamplona.amethyst.ui.note.types.RenderReport
 import com.vitorpamplona.amethyst.ui.note.types.RenderTextEvent
 import com.vitorpamplona.amethyst.ui.note.types.RenderTextModificationEvent
+import com.vitorpamplona.amethyst.ui.note.types.RenderTorrent
+import com.vitorpamplona.amethyst.ui.note.types.RenderTorrentComment
 import com.vitorpamplona.amethyst.ui.note.types.RenderWikiContent
 import com.vitorpamplona.amethyst.ui.note.types.VideoDisplay
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
@@ -182,6 +184,8 @@ import com.vitorpamplona.quartz.events.RepostEvent
 import com.vitorpamplona.quartz.events.SearchRelayListEvent
 import com.vitorpamplona.quartz.events.TextNoteEvent
 import com.vitorpamplona.quartz.events.TextNoteModificationEvent
+import com.vitorpamplona.quartz.events.TorrentCommentEvent
+import com.vitorpamplona.quartz.events.TorrentEvent
 import com.vitorpamplona.quartz.events.VideoEvent
 import com.vitorpamplona.quartz.events.VideoHorizontalEvent
 import com.vitorpamplona.quartz.events.VideoVerticalEvent
@@ -754,6 +758,27 @@ private fun RenderNoteRow(
                 accountViewModel,
                 nav,
             )
+        is TorrentEvent ->
+            RenderTorrent(
+                baseNote,
+                backgroundColor,
+                accountViewModel,
+                nav,
+            )
+
+        is TorrentCommentEvent ->
+            RenderTorrentComment(
+                baseNote,
+                makeItShort,
+                canPreview,
+                quotesLeft,
+                unPackReply,
+                backgroundColor,
+                editState,
+                accountViewModel,
+                nav,
+            )
+
         else -> {
             RenderTextEvent(
                 baseNote,

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/note/types/Torrent.kt

@@ -0,0 +1,286 @@
+/**
+ * Copyright (c) 2024 Vitor Pamplona
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package com.vitorpamplona.amethyst.ui.note.types
+
+import android.content.Intent
+import android.net.Uri
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.MutableState
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.text.style.TextOverflow
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
+import androidx.core.content.ContextCompat
+import com.vitorpamplona.amethyst.R
+import com.vitorpamplona.amethyst.model.LocalCache
+import com.vitorpamplona.amethyst.model.Note
+import com.vitorpamplona.amethyst.ui.actions.relays.countToHumanReadableBytes
+import com.vitorpamplona.amethyst.ui.components.ShowMoreButton
+import com.vitorpamplona.amethyst.ui.note.DownloadForOfflineIcon
+import com.vitorpamplona.amethyst.ui.note.getGradient
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.mockAccountViewModel
+import com.vitorpamplona.amethyst.ui.theme.Size20dp
+import com.vitorpamplona.amethyst.ui.theme.Size30dp
+import com.vitorpamplona.amethyst.ui.theme.Size5dp
+import com.vitorpamplona.amethyst.ui.theme.ThemeComparisonColumn
+import com.vitorpamplona.quartz.events.TorrentEvent
+import com.vitorpamplona.quartz.events.TorrentFile
+import kotlinx.collections.immutable.ImmutableList
+import kotlinx.collections.immutable.toImmutableList
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.runBlocking
+import kotlinx.coroutines.withContext
+import kotlin.coroutines.cancellation.CancellationException
+
+@Preview
+@Composable
+fun TorrentPreview() {
+    val accountViewModel = mockAccountViewModel()
+    val nav: (String) -> Unit = {}
+
+    val torrent =
+        runBlocking {
+            withContext(Dispatchers.IO) {
+                val torrent =
+                    TorrentEvent(
+                        id = "e1ab66dd66e6ac4f32119deacf80d7c50787705d343d3bb896c099cf93821757",
+                        pubKey = "0aa39e5aef99a000a7bdb0b499158c92bc4aa20fb65931a52d055b5eb6dff738",
+                        createdAt = 1724177932,
+                        tags =
+                            arrayOf(
+                                arrayOf("title", "bitcoin-core-27.0"),
+                                arrayOf("btih", "2b2d123e5e831b245fb1dc5b8b71f89de4a90d00"),
+                                arrayOf("t", "application"),
+                                arrayOf("file", "SHA256SUMS", "2842"),
+                                arrayOf("file", "SHA256SUMS.asc", "7590"),
+                                arrayOf("file", "SHA256SUMS.ots", "573"),
+                                arrayOf("file", "bitcoin-27.0-aarch64-linux-gnu-debug.tar.gz", "456216269"),
+                                arrayOf("file", "bitcoin-27.0-aarch64-linux-gnu.tar.gz", "46953175"),
+                                arrayOf("file", "bitcoin-27.0-arm-linux-gnueabihf-debug.tar.gz", "449092874"),
+                                arrayOf("file", "bitcoin-27.0-arm-linux-gnueabihf.tar.gz", "42887090"),
+                                arrayOf("file", "bitcoin-27.0-arm64-apple-darwin-unsigned.tar.gz", "16417606"),
+                                arrayOf("file", "bitcoin-27.0-arm64-apple-darwin-unsigned.zip", "16451447"),
+                                arrayOf("file", "bitcoin-27.0-arm64-apple-darwin.tar.gz", "36433324"),
+                                arrayOf("file", "bitcoin-27.0-arm64-apple-darwin.zip", "16217968"),
+                                arrayOf("file", "bitcoin-27.0-codesignatures-27.0.tar.gz", "335808"),
+                                arrayOf("file", "bitcoin-27.0-powerpc64-linux-gnu-debug.tar.gz", "467821947"),
+                                arrayOf("file", "bitcoin-27.0-powerpc64-linux-gnu.tar.gz", "53252604"),
+                                arrayOf("file", "bitcoin-27.0-powerpc64le-linux-gnu-debug.tar.gz", "460024501"),
+                                arrayOf("file", "bitcoin-27.0-powerpc64le-linux-gnu.tar.gz", "52020438"),
+                                arrayOf("file", "bitcoin-27.0-riscv64-linux-gnu-debug.tar.gz", "355544520"),
+                                arrayOf("file", "bitcoin-27.0-riscv64-linux-gnu.tar.gz", "47063263"),
+                                arrayOf("file", "bitcoin-27.0-win64-debug.zip", "522357199"),
+                                arrayOf("file", "bitcoin-27.0-win64-setup-unsigned.exe", "32348633"),
+                                arrayOf("file", "bitcoin-27.0-win64-setup.exe", "32359120"),
+                                arrayOf("file", "bitcoin-27.0-win64-unsigned.tar.gz", "32296875"),
+                                arrayOf("file", "bitcoin-27.0-win64.zip", "46821837"),
+                                arrayOf("file", "bitcoin-27.0-x86_64-apple-darwin-unsigned.tar.gz", "17160472"),
+                                arrayOf("file", "bitcoin-27.0-x86_64-apple-darwin-unsigned.zip", "17213924"),
+                                arrayOf("file", "bitcoin-27.0-x86_64-apple-darwin.tar.gz", "38428165"),
+                                arrayOf("file", "bitcoin-27.0-x86_64-apple-darwin.zip", "17474503"),
+                                arrayOf("file", "bitcoin-27.0-x86_64-linux-gnu-debug.tar.gz", "471529844"),
+                                arrayOf("file", "bitcoin-27.0-x86_64-linux-gnu.tar.gz", "48849225"),
+                                arrayOf("file", "bitcoin-27.0.tar.gz", "13082621"),
+                            ),
+                        content = "bitcoin-core-27.0",
+                        sig = "40e1ccfdc38a32e6c164bb66e50df0cd3769e0431137a07709534a72b462dfcbc40106560d0dd66841fef4cbb7aece7db64e83a0fbe414759d4d9a799e522c57",
+                    )
+
+                LocalCache.justConsume(torrent, null)
+
+                LocalCache.getOrCreateNote("e1ab66dd66e6ac4f32119deacf80d7c50787705d343d3bb896c099cf93821757")
+            }
+        }
+
+    ThemeComparisonColumn(
+        toPreview = {
+            RenderTorrent(
+                torrent,
+                remember { mutableStateOf(Color.Transparent) },
+                accountViewModel = accountViewModel,
+                nav = nav,
+            )
+        },
+    )
+}
+
+@Composable
+fun RenderTorrent(
+    note: Note,
+    backgroundColor: MutableState<Color>,
+    accountViewModel: AccountViewModel,
+    nav: (String) -> Unit,
+) {
+    val noteEvent = note.event as? TorrentEvent ?: return
+
+    val name = (noteEvent.title() ?: TorrentEvent.ALT_DESCRIPTION)
+    val size = " (" + countToHumanReadableBytes(noteEvent.totalSizeBytes()) + ")"
+
+    val description =
+        if (noteEvent.content() != name) {
+            noteEvent.content()
+        } else {
+            null
+        }
+
+    DisplayFileList(
+        noteEvent.files().toImmutableList(),
+        name + size,
+        description,
+        noteEvent::toMagnetLink,
+        backgroundColor,
+        accountViewModel,
+        nav,
+    )
+}
+
+@Composable
+fun DisplayFileList(
+    files: ImmutableList<TorrentFile>,
+    name: String,
+    description: String?,
+    link: () -> String,
+    backgroundColor: MutableState<Color>,
+    accountViewModel: AccountViewModel,
+    nav: (String) -> Unit,
+) {
+    var expanded by remember { mutableStateOf(false) }
+
+    val toMembersShow =
+        if (expanded) {
+            files
+        } else {
+            files.take(6)
+        }
+
+    Column {
+        Box(
+            contentAlignment = Alignment.CenterEnd,
+            modifier =
+                Modifier
+                    .padding(horizontal = Size5dp)
+                    .fillMaxWidth(),
+        ) {
+            Text(
+                text = name,
+                fontWeight = FontWeight.Bold,
+                maxLines = 1,
+                overflow = TextOverflow.Ellipsis,
+                textAlign = TextAlign.Center,
+                modifier = Modifier.fillMaxWidth(),
+            )
+
+            val context = LocalContext.current
+
+            IconButton(onClick = {
+                try {
+                    val intent = Intent(Intent.ACTION_VIEW, Uri.parse(link()))
+                    intent.flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TASK
+
+                    ContextCompat.startActivity(context, intent, null)
+                } catch (e: Exception) {
+                    if (e is CancellationException) throw e
+                    accountViewModel.toast(R.string.torrent_failure, R.string.torrent_no_apps)
+                }
+            }, Modifier.size(Size30dp)) {
+                DownloadForOfflineIcon(Size20dp, MaterialTheme.colorScheme.onBackground)
+            }
+        }
+
+        description?.let {
+            Text(
+                text = it,
+                maxLines = 3,
+                overflow = TextOverflow.Ellipsis,
+                modifier = Modifier.fillMaxWidth(),
+                textAlign = TextAlign.Center,
+                color = Color.Gray,
+            )
+        }
+
+        Box {
+            Column(modifier = Modifier.padding(top = 5.dp)) {
+                toMembersShow.forEach { fileName ->
+                    Row(
+                        modifier = Modifier.fillMaxWidth(),
+                        verticalAlignment = Alignment.CenterVertically,
+                    ) {
+                        Text(
+                            text = fileName.fileName,
+                            maxLines = 1,
+                            overflow = TextOverflow.Ellipsis,
+                            modifier =
+                                Modifier
+                                    .padding(start = 10.dp, end = 5.dp)
+                                    .weight(1f),
+                        )
+
+                        fileName.bytes?.let {
+                            Text(
+                                text = countToHumanReadableBytes(it),
+                                maxLines = 1,
+                                overflow = TextOverflow.Ellipsis,
+                                modifier =
+                                    Modifier
+                                        .padding(start = 5.dp, end = 10.dp),
+                            )
+                        }
+                    }
+                }
+            }
+
+            if (files.size > 3 && !expanded) {
+                Row(
+                    verticalAlignment = Alignment.CenterVertically,
+                    horizontalArrangement = Arrangement.Center,
+                    modifier =
+                        Modifier
+                            .align(Alignment.BottomCenter)
+                            .fillMaxWidth()
+                            .background(getGradient(backgroundColor)),
+                ) {
+                    ShowMoreButton { expanded = !expanded }
+                }
+            }
+        }
+    }
+}

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/note/types/TorrentComment.kt

@@ -0,0 +1,260 @@
+/**
+ * Copyright (c) 2024 Vitor Pamplona
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package com.vitorpamplona.amethyst.ui.note.types
+
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.outlined.FileOpen
+import androidx.compose.material3.Icon
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.MutableState
+import androidx.compose.runtime.State
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.livedata.observeAsState
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.text.style.TextOverflow
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
+import com.vitorpamplona.amethyst.R
+import com.vitorpamplona.amethyst.model.LocalCache
+import com.vitorpamplona.amethyst.model.Note
+import com.vitorpamplona.amethyst.ui.actions.relays.countToHumanReadableBytes
+import com.vitorpamplona.amethyst.ui.components.GenericLoadable
+import com.vitorpamplona.amethyst.ui.components.LoadNote
+import com.vitorpamplona.amethyst.ui.navigation.routeFor
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.mockAccountViewModel
+import com.vitorpamplona.amethyst.ui.stringRes
+import com.vitorpamplona.amethyst.ui.theme.StdVertSpacer
+import com.vitorpamplona.amethyst.ui.theme.ThemeComparisonColumn
+import com.vitorpamplona.amethyst.ui.theme.replyModifier
+import com.vitorpamplona.quartz.events.TorrentCommentEvent
+import com.vitorpamplona.quartz.events.TorrentEvent
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.runBlocking
+import kotlinx.coroutines.withContext
+
+@Preview
+@Composable
+fun TorrentCommentPreview() {
+    val accountViewModel = mockAccountViewModel()
+    val nav: (String) -> Unit = {}
+
+    val comment =
+        runBlocking {
+            withContext(Dispatchers.IO) {
+                val torrent =
+                    TorrentEvent(
+                        id = "e1ab66dd66e6ac4f32119deacf80d7c50787705d343d3bb896c099cf93821757",
+                        pubKey = "0aa39e5aef99a000a7bdb0b499158c92bc4aa20fb65931a52d055b5eb6dff738",
+                        createdAt = 1724177932,
+                        tags =
+                            arrayOf(
+                                arrayOf("title", "bitcoin-core-27.0"),
+                                arrayOf("btih", "2b2d123e5e831b245fb1dc5b8b71f89de4a90d00"),
+                                arrayOf("t", "application"),
+                                arrayOf("file", "SHA256SUMS", "2842"),
+                                arrayOf("file", "SHA256SUMS.asc", "7590"),
+                                arrayOf("file", "SHA256SUMS.ots", "573"),
+                                arrayOf("file", "bitcoin-27.0-aarch64-linux-gnu-debug.tar.gz", "456216269"),
+                                arrayOf("file", "bitcoin-27.0-aarch64-linux-gnu.tar.gz", "46953175"),
+                                arrayOf("file", "bitcoin-27.0-arm-linux-gnueabihf-debug.tar.gz", "449092874"),
+                                arrayOf("file", "bitcoin-27.0-arm-linux-gnueabihf.tar.gz", "42887090"),
+                                arrayOf("file", "bitcoin-27.0-arm64-apple-darwin-unsigned.tar.gz", "16417606"),
+                                arrayOf("file", "bitcoin-27.0-arm64-apple-darwin-unsigned.zip", "16451447"),
+                                arrayOf("file", "bitcoin-27.0-arm64-apple-darwin.tar.gz", "36433324"),
+                                arrayOf("file", "bitcoin-27.0-arm64-apple-darwin.zip", "16217968"),
+                                arrayOf("file", "bitcoin-27.0-codesignatures-27.0.tar.gz", "335808"),
+                                arrayOf("file", "bitcoin-27.0-powerpc64-linux-gnu-debug.tar.gz", "467821947"),
+                                arrayOf("file", "bitcoin-27.0-powerpc64-linux-gnu.tar.gz", "53252604"),
+                                arrayOf("file", "bitcoin-27.0-powerpc64le-linux-gnu-debug.tar.gz", "460024501"),
+                                arrayOf("file", "bitcoin-27.0-powerpc64le-linux-gnu.tar.gz", "52020438"),
+                                arrayOf("file", "bitcoin-27.0-riscv64-linux-gnu-debug.tar.gz", "355544520"),
+                                arrayOf("file", "bitcoin-27.0-riscv64-linux-gnu.tar.gz", "47063263"),
+                                arrayOf("file", "bitcoin-27.0-win64-debug.zip", "522357199"),
+                                arrayOf("file", "bitcoin-27.0-win64-setup-unsigned.exe", "32348633"),
+                                arrayOf("file", "bitcoin-27.0-win64-setup.exe", "32359120"),
+                                arrayOf("file", "bitcoin-27.0-win64-unsigned.tar.gz", "32296875"),
+                                arrayOf("file", "bitcoin-27.0-win64.zip", "46821837"),
+                                arrayOf("file", "bitcoin-27.0-x86_64-apple-darwin-unsigned.tar.gz", "17160472"),
+                                arrayOf("file", "bitcoin-27.0-x86_64-apple-darwin-unsigned.zip", "17213924"),
+                                arrayOf("file", "bitcoin-27.0-x86_64-apple-darwin.tar.gz", "38428165"),
+                                arrayOf("file", "bitcoin-27.0-x86_64-apple-darwin.zip", "17474503"),
+                                arrayOf("file", "bitcoin-27.0-x86_64-linux-gnu-debug.tar.gz", "471529844"),
+                                arrayOf("file", "bitcoin-27.0-x86_64-linux-gnu.tar.gz", "48849225"),
+                                arrayOf("file", "bitcoin-27.0.tar.gz", "13082621"),
+                            ),
+                        content = "bitcoin-core-27.0",
+                        sig = "40e1ccfdc38a32e6c164bb66e50df0cd3769e0431137a07709534a72b462dfcbc40106560d0dd66841fef4cbb7aece7db64e83a0fbe414759d4d9a799e522c57",
+                    )
+
+                val comment =
+                    TorrentCommentEvent(
+                        id = "040aba32010b5adf7cb917054e894e86c8ea7a2bcee448b2266c493f3140e9a0",
+                        pubKey = "460c25e682fda7832b52d1f22d3d22b3176d972f60dcdc3212ed8c92ef85065c",
+                        createdAt = 1724276875,
+                        tags = arrayOf(arrayOf("e", "e1ab66dd66e6ac4f32119deacf80d7c50787705d343d3bb896c099cf93821757", "wss://relay.damus.io/", "", "0aa39e5aef99a000a7bdb0b499158c92bc4aa20fb65931a52d055b5eb6dff738", "root")),
+                        content = "nice!",
+                        sig = "014391c310b1eebb807da4c9b11563126f2b795c9372a9432cae4dd2c0695b88584bb1c68814554c9b1a47626e3d60983e3653c29d0fdbc3a474277c140b95c3",
+                    )
+
+                LocalCache.justConsume(torrent, null)
+                LocalCache.justConsume(comment, null)
+                LocalCache.getOrCreateNote("040aba32010b5adf7cb917054e894e86c8ea7a2bcee448b2266c493f3140e9a0")
+            }
+        }
+
+    ThemeComparisonColumn(
+        toPreview = {
+            RenderTorrentComment(
+                comment,
+                false,
+                true,
+                3,
+                true,
+                remember { mutableStateOf(Color.Transparent) },
+                EmptyState,
+                accountViewModel = accountViewModel,
+                nav = nav,
+            )
+        },
+    )
+}
+
+@Composable
+fun RenderTorrentComment(
+    note: Note,
+    makeItShort: Boolean,
+    canPreview: Boolean,
+    quotesLeft: Int,
+    unPackReply: Boolean,
+    backgroundColor: MutableState<Color>,
+    editState: State<GenericLoadable<EditState>>,
+    accountViewModel: AccountViewModel,
+    nav: (String) -> Unit,
+) {
+    Column {
+        val noteEvent = note.event
+
+        if (unPackReply) {
+            val torrentInfo =
+                remember(noteEvent) {
+                    if (noteEvent is TorrentCommentEvent) {
+                        noteEvent.torrent()
+                    } else {
+                        null
+                    }
+                }
+
+            torrentInfo?.let {
+                TorrentHeader(
+                    torrentHex = it,
+                    modifier = MaterialTheme.colorScheme.replyModifier.padding(10.dp),
+                    accountViewModel = accountViewModel,
+                    nav = nav,
+                )
+                Spacer(modifier = StdVertSpacer)
+            }
+        }
+
+        RenderTextEvent(
+            note,
+            makeItShort,
+            canPreview,
+            quotesLeft,
+            unPackReply = false,
+            backgroundColor,
+            editState,
+            accountViewModel,
+            nav,
+        )
+    }
+}
+
+@Composable
+fun TorrentHeader(
+    torrentHex: String,
+    modifier: Modifier,
+    accountViewModel: AccountViewModel,
+    nav: (String) -> Unit,
+) {
+    LoadNote(baseNoteHex = torrentHex, accountViewModel = accountViewModel) {
+        if (it != null) {
+            ShortTorrentHeader(it, modifier, accountViewModel, nav)
+        }
+    }
+}
+
+@Composable
+fun ShortTorrentHeader(
+    baseNote: Note,
+    modifier: Modifier,
+    accountViewModel: AccountViewModel,
+    nav: (String) -> Unit,
+) {
+    val channelState by baseNote.live().metadata.observeAsState()
+    val note = channelState?.note ?: return
+    val noteEvent = note.event as? TorrentEvent ?: return
+
+    Row(
+        verticalAlignment = Alignment.CenterVertically,
+        modifier =
+            modifier.clickable {
+                routeFor(baseNote, accountViewModel.userProfile())?.let { nav(it) }
+            },
+    ) {
+        Icons.Outlined.FileOpen
+
+        Icon(
+            imageVector = Icons.Outlined.FileOpen,
+            contentDescription = stringRes(id = R.string.torrent_file),
+            modifier = Modifier.size(20.dp),
+        )
+
+        Text(
+            text = remember(channelState) { noteEvent.title() ?: TorrentEvent.ALT_DESCRIPTION },
+            maxLines = 1,
+            overflow = TextOverflow.Ellipsis,
+            modifier =
+                Modifier
+                    .padding(start = 10.dp)
+                    .weight(1f),
+        )
+
+        Text(
+            text = remember(channelState) { countToHumanReadableBytes(noteEvent.totalSizeBytes()) },
+            maxLines = 1,
+            overflow = TextOverflow.Ellipsis,
+            modifier = Modifier.padding(end = 5.dp),
+        )
+    }
+}

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/ThreadFeedView.kt

@@ -135,6 +135,8 @@ import com.vitorpamplona.amethyst.ui.note.types.RenderPostApproval
 import com.vitorpamplona.amethyst.ui.note.types.RenderPrivateMessage
 import com.vitorpamplona.amethyst.ui.note.types.RenderTextEvent
 import com.vitorpamplona.amethyst.ui.note.types.RenderTextModificationEvent
+import com.vitorpamplona.amethyst.ui.note.types.RenderTorrent
+import com.vitorpamplona.amethyst.ui.note.types.RenderTorrentComment
 import com.vitorpamplona.amethyst.ui.note.types.VideoDisplay
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.chatrooms.ChannelHeader
@@ -185,6 +187,8 @@ import com.vitorpamplona.quartz.events.RelaySetEvent
 import com.vitorpamplona.quartz.events.RepostEvent
 import com.vitorpamplona.quartz.events.SearchRelayListEvent
 import com.vitorpamplona.quartz.events.TextNoteModificationEvent
+import com.vitorpamplona.quartz.events.TorrentCommentEvent
+import com.vitorpamplona.quartz.events.TorrentEvent
 import com.vitorpamplona.quartz.events.VideoEvent
 import com.vitorpamplona.quartz.events.WikiNoteEvent
 import kotlinx.collections.immutable.toImmutableList
@@ -607,6 +611,25 @@ private fun FullBleedNoteCompose(
                         accountViewModel,
                         nav,
                     )
+                } else if (noteEvent is TorrentEvent) {
+                    RenderTorrent(
+                        baseNote,
+                        backgroundColor,
+                        accountViewModel,
+                        nav,
+                    )
+                } else if (noteEvent is TorrentCommentEvent) {
+                    RenderTorrentComment(
+                        baseNote,
+                        false,
+                        canPreview,
+                        quotesLeft = 3,
+                        unPackReply = false,
+                        backgroundColor,
+                        editState,
+                        accountViewModel,
+                        nav,
+                    )
                 } else {
                     RenderTextEvent(
                         baseNote,

amethyst/src/main/res/values/strings.xml

@@ -964,4 +964,9 @@
     <string name="delete_all_drafts_confirmation">Are you sure you want to delete all drafts?</string>
     <string name="and_more">" … and %1$s more"</string>
     <string name="stack">Stack:</string>
+
+    <string name="torrent_file">Torrent File</string>
+    <string name="torrent_download">Download</string>
+    <string name="torrent_failure">Failed to open file</string>
+    <string name="torrent_no_apps">No torrent apps installed to open and download the file.</string>
 </resources>

quartz/src/main/java/com/vitorpamplona/quartz/events/DraftEvent.kt

@@ -117,6 +117,21 @@ class DraftEvent(
             dTag: String,
         ): String = ATag.assembleATag(KIND, pubKey, dTag)
 
+        fun create(
+            dTag: String,
+            originalNote: TorrentCommentEvent,
+            signer: NostrSigner,
+            createdAt: Long = TimeUtils.now(),
+            onReady: (DraftEvent) -> Unit,
+        ) {
+            val tagsWithMarkers =
+                originalNote.tags().filter {
+                    it.size > 3 && (it[0] == "e" || it[0] == "a") && (it[3] == "root" || it[3] == "reply")
+                }
+
+            create(dTag, originalNote, tagsWithMarkers, signer, createdAt, onReady)
+        }
+
         fun create(
             dTag: String,
             originalNote: LiveActivitiesChatMessageEvent,
@@ -125,10 +140,10 @@ class DraftEvent(
             onReady: (DraftEvent) -> Unit,
         ) {
             val tags = mutableListOf<Array<String>>()
-            originalNote.activity()?.let { tags.add(arrayOf("a", it.toTag())) }
+            originalNote.activity()?.let { tags.add(arrayOf("a", it.toTag(), "", "root")) }
-            originalNote.replyingTo()?.let { tags.add(arrayOf("e", it)) }
+            originalNote.replyingTo()?.let { tags.add(arrayOf("e", it, "", "reply")) }
 
-            create(dTag, originalNote, emptyList(), signer, createdAt, onReady)
+            create(dTag, originalNote, tags, signer, createdAt, onReady)
         }
 
         fun create(

quartz/src/main/java/com/vitorpamplona/quartz/events/Event.kt

@@ -124,6 +124,8 @@ open class Event(
 
     override fun taggedUrls() = tags.filter { it.size > 1 && it[0] == "r" }.map { it[1] }
 
+    override fun firstTag(key: String) = tags.firstOrNull { it.size > 1 && it[0] == key }?.let { it[1] }
+
     override fun firstTagFor(vararg key: String) = tags.firstOrNull { it.size > 1 && it[0] in key }?.let { it[1] }
 
     override fun firstTaggedUser() = tags.firstOrNull { it.size > 1 && it[0] == "p" }?.let { it[1] }

quartz/src/main/java/com/vitorpamplona/quartz/events/EventFactory.kt

@@ -142,6 +142,8 @@ class EventFactory {
             StatusEvent.KIND -> StatusEvent(id, pubKey, createdAt, tags, content, sig)
             TextNoteEvent.KIND -> TextNoteEvent(id, pubKey, createdAt, tags, content, sig)
             TextNoteModificationEvent.KIND -> TextNoteModificationEvent(id, pubKey, createdAt, tags, content, sig)
+            TorrentEvent.KIND -> TorrentEvent(id, pubKey, createdAt, tags, content, sig)
+            TorrentCommentEvent.KIND -> TorrentCommentEvent(id, pubKey, createdAt, tags, content, sig)
             VideoHorizontalEvent.KIND -> VideoHorizontalEvent(id, pubKey, createdAt, tags, content, sig)
             VideoVerticalEvent.KIND -> VideoVerticalEvent(id, pubKey, createdAt, tags, content, sig)
             VideoViewEvent.KIND -> VideoViewEvent(id, pubKey, createdAt, tags, content, sig)

quartz/src/main/java/com/vitorpamplona/quartz/events/EventInterface.kt

@@ -133,6 +133,8 @@ interface EventInterface {
 
     fun taggedUrls(): List<String>
 
+    fun firstTag(key: String): String?
+
     fun firstTagFor(vararg key: String): String?
 
     fun firstTaggedAddress(): ATag?

quartz/src/main/java/com/vitorpamplona/quartz/events/TorrentCommentEvent.kt

@@ -0,0 +1,141 @@
+/**
+ * Copyright (c) 2024 Vitor Pamplona
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package com.vitorpamplona.quartz.events
+
+import androidx.compose.runtime.Immutable
+import com.vitorpamplona.quartz.encoders.ATag
+import com.vitorpamplona.quartz.encoders.HexKey
+import com.vitorpamplona.quartz.encoders.Nip92MediaAttachments
+import com.vitorpamplona.quartz.signers.NostrSigner
+import com.vitorpamplona.quartz.utils.TimeUtils
+
+@Immutable
+class TorrentCommentEvent(
+    id: HexKey,
+    pubKey: HexKey,
+    createdAt: Long,
+    tags: Array<Array<String>>,
+    content: String,
+    sig: HexKey,
+) : BaseTextNoteEvent(id, pubKey, createdAt, KIND, tags, content, sig) {
+    private fun innerTorrent() =
+        tags.firstOrNull { it.size > 3 && it[0] == "e" && it[3] == "root" }
+            ?: tags.firstOrNull { it.size > 1 && it[0] == "e" }
+
+    fun torrent() = innerTorrent()?.getOrNull(1)
+
+    companion object {
+        const val KIND = 2004
+        const val ALT = "Comment for a Torrent file"
+
+        fun create(
+            message: String,
+            torrent: HexKey,
+            replyTos: List<String>? = null,
+            mentions: List<String>? = null,
+            addresses: List<ATag>? = null,
+            extraTags: List<String>? = null,
+            zapReceiver: List<ZapSplitSetup>? = null,
+            signer: NostrSigner,
+            createdAt: Long = TimeUtils.now(),
+            markAsSensitive: Boolean,
+            replyingTo: String? = null,
+            directMentions: Set<HexKey> = emptySet(),
+            zapRaiserAmount: Long?,
+            geohash: String? = null,
+            nip94attachments: List<FileHeaderEvent>? = null,
+            forkedFrom: Event? = null,
+            isDraft: Boolean,
+            onReady: (TorrentCommentEvent) -> Unit,
+        ) {
+            val content = message
+
+            val tags = mutableListOf<Array<String>>()
+            replyTos?.let {
+                tags.addAll(
+                    it.positionalMarkedTags(
+                        tagName = "e",
+                        root = torrent,
+                        replyingTo = replyingTo,
+                        directMentions = directMentions,
+                        forkedFrom = forkedFrom?.id,
+                    ),
+                )
+            }
+            mentions?.forEach {
+                if (it in directMentions) {
+                    tags.add(arrayOf("p", it, "", "mention"))
+                } else {
+                    tags.add(arrayOf("p", it))
+                }
+            }
+            replyTos?.forEach {
+                if (it in directMentions) {
+                    tags.add(arrayOf("q", it))
+                }
+            }
+            addresses
+                ?.map { it.toTag() }
+                ?.let {
+                    tags.addAll(
+                        it.positionalMarkedTags(
+                            tagName = "a",
+                            root = torrent,
+                            replyingTo = replyingTo,
+                            directMentions = directMentions,
+                            forkedFrom = (forkedFrom as? AddressableEvent)?.address()?.toTag(),
+                        ),
+                    )
+                }
+            findHashtags(message).forEach {
+                val lowercaseTag = it.lowercase()
+                tags.add(arrayOf("t", it))
+                if (it != lowercaseTag) {
+                    tags.add(arrayOf("t", it.lowercase()))
+                }
+            }
+            extraTags?.forEach { tags.add(arrayOf("t", it)) }
+            zapReceiver?.forEach {
+                tags.add(arrayOf("zap", it.lnAddressOrPubKeyHex, it.relay ?: "", it.weight.toString()))
+            }
+            findURLs(message).forEach { tags.add(arrayOf("r", it)) }
+            if (markAsSensitive) {
+                tags.add(arrayOf("content-warning", ""))
+            }
+            zapRaiserAmount?.let { tags.add(arrayOf("zapraiser", "$it")) }
+            geohash?.let { tags.addAll(geohashMipMap(it)) }
+            nip94attachments?.let {
+                it.forEach {
+                    Nip92MediaAttachments().convertFromFileHeader(it)?.let {
+                        tags.add(it)
+                    }
+                }
+            }
+            tags.add(arrayOf("alt", ALT))
+
+            if (isDraft) {
+                signer.assembleRumor(createdAt, KIND, tags.toTypedArray(), content, onReady)
+            } else {
+                signer.sign(createdAt, KIND, tags.toTypedArray(), content, onReady)
+            }
+        }
+    }
+}

quartz/src/main/java/com/vitorpamplona/quartz/events/TorrentEvent.kt

@@ -0,0 +1,127 @@
+/**
+ * Copyright (c) 2024 Vitor Pamplona
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package com.vitorpamplona.quartz.events
+
+import android.net.Uri
+import androidx.compose.runtime.Immutable
+import com.vitorpamplona.quartz.encoders.HexKey
+import com.vitorpamplona.quartz.signers.NostrSigner
+import com.vitorpamplona.quartz.utils.TimeUtils
+
+@Immutable
+class TorrentEvent(
+    id: HexKey,
+    pubKey: HexKey,
+    createdAt: Long,
+    tags: Array<Array<String>>,
+    content: String,
+    sig: HexKey,
+) : Event(id, pubKey, createdAt, KIND, tags, content, sig) {
+    fun title() = firstTag("title")
+
+    fun btih() = firstTag("btih")
+
+    fun x() = firstTag("x")
+
+    fun trackers() = tags.filter { it.size > 1 && it[0] == "tracker" }.map { it[1] }
+
+    fun files() = tags.filter { it.size > 1 && it[0] == "file" }.map { TorrentFile(it[1], it.getOrNull(2)?.toLongOrNull()) }
+
+    fun toMagnetLink(): String {
+        val builder = Uri.Builder()
+        builder
+            .scheme("magnet")
+            .appendQueryParameter("xt", "urn:btih:${btih()}")
+            .appendQueryParameter("dn", title())
+
+        trackers().ifEmpty { DEFAULT_TRACKERS }.forEach {
+            builder.appendQueryParameter("tr", it)
+        }
+
+        return builder.build().toString()
+    }
+
+    fun totalSizeBytes(): Long = tags.filter { it.size > 1 && it[0] == "file" }.sumOf { it.getOrNull(2)?.toLongOrNull() ?: 0L }
+
+    companion object {
+        const val KIND = 2003
+        const val ALT_DESCRIPTION = "A torrent file"
+
+        val DEFAULT_TRACKERS =
+            listOf(
+                "http://tracker.loadpeers.org:8080/xvRKfvAlnfuf5EfxTT5T0KIVPtbqAHnX/announce",
+                "udp://tracker.coppersurfer.tk:6969/announce",
+                "udp://tracker.openbittorrent.com:6969/announce",
+                "udp://open.stealth.si:80/announce",
+                "udp://tracker.torrent.eu.org:451/announce",
+                "udp://tracker.opentrackr.org:1337",
+            )
+
+        fun create(
+            title: String,
+            btih: String,
+            files: List<TorrentFile>,
+            description: String? = null,
+            x: String? = null,
+            trackers: List<String>? = null,
+            alt: String? = null,
+            sensitiveContent: Boolean? = null,
+            signer: NostrSigner,
+            createdAt: Long = TimeUtils.now(),
+            onReady: (TorrentEvent) -> Unit,
+        ) {
+            val tags =
+                listOfNotNull(
+                    arrayOf("title", title),
+                    arrayOf("btih", btih),
+                    x?.let { arrayOf("x", it) },
+                    alt?.let { arrayOf("alt", it) } ?: arrayOf("alt", ALT_DESCRIPTION),
+                    sensitiveContent?.let {
+                        if (it) {
+                            arrayOf("content-warning", "")
+                        } else {
+                            null
+                        }
+                    },
+                ) +
+                    files.map {
+                        if (it.bytes != null) {
+                            arrayOf(it.fileName, it.bytes.toString())
+                        } else {
+                            arrayOf(it.fileName)
+                        }
+                    } +
+                    (
+                        trackers?.map {
+                            arrayOf(it)
+                        } ?: emptyList()
+                    )
+
+            val content = description ?: ""
+            signer.sign(createdAt, KIND, tags.toTypedArray(), content, onReady)
+        }
+    }
+}
+
+class TorrentFile(
+    val fileName: String,
+    val bytes: Long?,
+)