Adds method to create the NIP-65 list

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

@@ -47,6 +47,7 @@ import com.vitorpamplona.quartz.encoders.HexKey
 import com.vitorpamplona.quartz.encoders.Nip47WalletConnect
 import com.vitorpamplona.quartz.encoders.hexToByteArray
 import com.vitorpamplona.quartz.encoders.toHexKey
+import com.vitorpamplona.quartz.events.AdvertisedRelayListEvent
 import com.vitorpamplona.quartz.events.BookmarkListEvent
 import com.vitorpamplona.quartz.events.ChannelCreateEvent
 import com.vitorpamplona.quartz.events.ChannelMessageEvent
@@ -2580,6 +2581,34 @@ class Account(
         }
     }
 
+    fun sendNip65RelayList(relays: List<AdvertisedRelayListEvent.AdvertisedRelayInfo>) {
+        if (!isWriteable()) return
+
+        val nip65RelayList =
+            LocalCache.getOrCreateAddressableNote(
+                AdvertisedRelayListEvent.createAddressATag(signer.pubKey),
+            ).event as? AdvertisedRelayListEvent
+
+        if (nip65RelayList != null) {
+            AdvertisedRelayListEvent.updateRelayList(
+                earlierVersion = nip65RelayList,
+                relays = relays,
+                signer = signer,
+            ) {
+                Client.send(it)
+                LocalCache.justConsume(it, null)
+            }
+        } else {
+            AdvertisedRelayListEvent.createFromScratch(
+                relays = relays,
+                signer = signer,
+            ) {
+                Client.send(it)
+                LocalCache.justConsume(it, null)
+            }
+        }
+    }
+
     fun setHideDeleteRequestDialog() {
         hideDeleteRequestDialog = true
         saveable.invalidateData()

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

@@ -57,28 +57,62 @@ class AdvertisedRelayListEvent(
     companion object {
         const val KIND = 10002
         const val FIXED_D_TAG = ""
+        const val ALT = "Relay list to discover the user's content"
 
-        fun createAddressTag(pubKey: HexKey): ATag {
+        fun createAddressATag(pubKey: HexKey): ATag {
             return ATag(KIND, pubKey, FIXED_D_TAG, null)
         }
 
+        fun createAddressTag(pubKey: HexKey): String {
+            return ATag.assembleATag(KIND, pubKey, FIXED_D_TAG)
+        }
+
+        fun updateRelayList(
+            earlierVersion: AdvertisedRelayListEvent,
+            relays: List<AdvertisedRelayInfo>,
+            signer: NostrSigner,
+            createdAt: Long = TimeUtils.now(),
+            onReady: (AdvertisedRelayListEvent) -> Unit,
+        ) {
+            val tags =
+                earlierVersion.tags.filter { it[0] != "r" }.plus(
+                    relays.map(::createRelayTag),
+                ).toTypedArray()
+
+            signer.sign(createdAt, KIND, tags, earlierVersion.content, onReady)
+        }
+
+        fun createFromScratch(
+            relays: List<AdvertisedRelayInfo>,
+            signer: NostrSigner,
+            createdAt: Long = TimeUtils.now(),
+            onReady: (AdvertisedRelayListEvent) -> Unit,
+        ) {
+            create(relays, signer, createdAt, onReady)
+        }
+
+        fun createRelayTag(relay: AdvertisedRelayInfo): Array<String> {
+            return if (relay.type == AdvertisedRelayType.BOTH) {
+                arrayOf("r", relay.relayUrl)
+            } else {
+                arrayOf("r", relay.relayUrl, relay.type.code)
+            }
+        }
+
+        fun createTagArray(relays: List<AdvertisedRelayInfo>): Array<Array<String>> {
+            return relays
+                .map(::createRelayTag)
+                .plusElement(arrayOf("alt", ALT))
+                .toTypedArray()
+        }
+
         fun create(
             list: List<AdvertisedRelayInfo>,
             signer: NostrSigner,
             createdAt: Long = TimeUtils.now(),
             onReady: (AdvertisedRelayListEvent) -> Unit,
         ) {
-            val tags =
+            val tags = createTagArray(list)
-                list
-                    .map {
-                        if (it.type == AdvertisedRelayType.BOTH) {
-                            arrayOf(it.relayUrl)
-                        } else {
-                            arrayOf(it.relayUrl, it.type.code)
-                        }
-                    }
-                    .plusElement(arrayOf("alt", "Relay list event with ${list.size} relays"))
-                    .toTypedArray()
             val msg = ""
 
             signer.sign(createdAt, KIND, tags, msg, onReady)