kopia lustrzana https://github.com/vitorpamplona/amethyst
114 wiersze
3.6 KiB
Kotlin
114 wiersze
3.6 KiB
Kotlin
/**
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* Copyright (c) 2024 Vitor Pamplona
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to use,
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* copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
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* Software, and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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package com.vitorpamplona.quartz.events
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import androidx.compose.runtime.Immutable
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import com.vitorpamplona.quartz.crypto.KeyPair
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import com.vitorpamplona.quartz.encoders.HexKey
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import com.vitorpamplona.quartz.signers.NostrSigner
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import com.vitorpamplona.quartz.signers.NostrSignerInternal
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import com.vitorpamplona.quartz.utils.TimeUtils
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@Immutable
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class GiftWrapEvent(
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id: HexKey,
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pubKey: HexKey,
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createdAt: Long,
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tags: Array<Array<String>>,
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content: String,
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sig: HexKey,
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) : Event(id, pubKey, createdAt, KIND, tags, content, sig) {
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@Transient private var cachedInnerEvent: Map<HexKey, Event?> = mapOf()
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override fun isContentEncoded() = true
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fun preCachedGift(signer: NostrSigner): Event? {
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return cachedInnerEvent[signer.pubKey]
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}
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fun addToCache(
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pubKey: HexKey,
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gift: Event,
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) {
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cachedInnerEvent = cachedInnerEvent + Pair(pubKey, gift)
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}
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fun cachedGift(
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signer: NostrSigner,
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onReady: (Event) -> Unit,
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) {
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cachedInnerEvent[signer.pubKey]?.let {
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onReady(it)
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return
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}
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unwrap(signer) { gift ->
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if (gift is WrappedEvent) {
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gift.host = this
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}
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addToCache(signer.pubKey, gift)
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onReady(gift)
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}
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}
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private fun unwrap(
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signer: NostrSigner,
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onReady: (Event) -> Unit,
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) {
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try {
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plainContent(signer) { onReady(fromJson(it)) }
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} catch (e: Exception) {
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// Log.e("UnwrapError", "Couldn't Decrypt the content", e)
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}
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}
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private fun plainContent(
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signer: NostrSigner,
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onReady: (String) -> Unit,
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) {
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if (content.isEmpty()) return
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signer.nip44Decrypt(content, pubKey, onReady)
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}
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fun recipientPubKey() = tags.firstOrNull { it.size > 1 && it[0] == "p" }?.get(1)
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companion object {
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const val KIND = 1059
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const val ALT = "Encrypted event"
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fun create(
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event: Event,
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recipientPubKey: HexKey,
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createdAt: Long = TimeUtils.randomWithinAWeek(),
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onReady: (GiftWrapEvent) -> Unit,
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) {
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val signer = NostrSignerInternal(KeyPair()) // GiftWrap is always a random key
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val serializedContent = toJson(event)
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val tags = arrayOf(arrayOf("p", recipientPubKey))
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signer.nip44Encrypt(serializedContent, recipientPubKey) { content ->
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signer.sign(createdAt, KIND, tags, content, onReady)
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}
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}
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}
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}
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