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https://github.com/permissionlesstech/bitchat.git
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PeerID 24/n: Nostr Transport and Embedding (#830)
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@@ -4,7 +4,7 @@ import Foundation
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struct NostrEmbeddedBitChat {
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/// Build a `bitchat1:` base64url-encoded BitChat packet carrying a private message for Nostr DMs.
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static func encodePMForNostr(content: String, messageID: String, recipientPeerID: String, senderPeerID: String) -> String? {
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static func encodePMForNostr(content: String, messageID: String, recipientPeerID: PeerID, senderPeerID: PeerID) -> String? {
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// TLV-encode the private message
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let pm = PrivateMessagePacket(messageID: messageID, content: content)
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guard let tlv = pm.encode() else { return nil }
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@@ -14,12 +14,12 @@ struct NostrEmbeddedBitChat {
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payload.append(tlv)
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// Determine 8-byte recipient ID to embed
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let recipientIDHex: String = normalizeRecipientPeerID(recipientPeerID)
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let recipientID = normalizeRecipientPeerID(recipientPeerID)
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let packet = BitchatPacket(
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type: MessageType.noiseEncrypted.rawValue,
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senderID: Data(hexString: senderPeerID) ?? Data(),
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recipientID: Data(hexString: recipientIDHex),
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senderID: Data(hexString: senderPeerID.id) ?? Data(),
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recipientID: Data(hexString: recipientID.id),
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timestamp: UInt64(Date().timeIntervalSince1970 * 1000),
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payload: payload,
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signature: nil,
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@@ -31,18 +31,18 @@ struct NostrEmbeddedBitChat {
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}
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/// Build a `bitchat1:` base64url-encoded BitChat packet carrying a delivery/read ack for Nostr DMs.
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static func encodeAckForNostr(type: NoisePayloadType, messageID: String, recipientPeerID: String, senderPeerID: String) -> String? {
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static func encodeAckForNostr(type: NoisePayloadType, messageID: String, recipientPeerID: PeerID, senderPeerID: PeerID) -> String? {
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guard type == .delivered || type == .readReceipt else { return nil }
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var payload = Data([type.rawValue])
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payload.append(Data(messageID.utf8))
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let recipientIDHex: String = normalizeRecipientPeerID(recipientPeerID)
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let recipientID = normalizeRecipientPeerID(recipientPeerID)
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let packet = BitchatPacket(
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type: MessageType.noiseEncrypted.rawValue,
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senderID: Data(hexString: senderPeerID) ?? Data(),
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recipientID: Data(hexString: recipientIDHex),
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senderID: Data(hexString: senderPeerID.id) ?? Data(),
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recipientID: Data(hexString: recipientID.id),
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timestamp: UInt64(Date().timeIntervalSince1970 * 1000),
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payload: payload,
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signature: nil,
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@@ -54,7 +54,7 @@ struct NostrEmbeddedBitChat {
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}
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/// Build a `bitchat1:` ACK (delivered/read) without an embedded recipient peer ID (geohash DMs).
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static func encodeAckForNostrNoRecipient(type: NoisePayloadType, messageID: String, senderPeerID: String) -> String? {
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static func encodeAckForNostrNoRecipient(type: NoisePayloadType, messageID: String, senderPeerID: PeerID) -> String? {
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guard type == .delivered || type == .readReceipt else { return nil }
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var payload = Data([type.rawValue])
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@@ -62,7 +62,7 @@ struct NostrEmbeddedBitChat {
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let packet = BitchatPacket(
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type: MessageType.noiseEncrypted.rawValue,
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senderID: Data(hexString: senderPeerID) ?? Data(),
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senderID: Data(hexString: senderPeerID.id) ?? Data(),
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recipientID: nil,
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timestamp: UInt64(Date().timeIntervalSince1970 * 1000),
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payload: payload,
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@@ -75,7 +75,7 @@ struct NostrEmbeddedBitChat {
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}
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/// Build a `bitchat1:` payload without an embedded recipient peer ID (used for geohash DMs).
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static func encodePMForNostrNoRecipient(content: String, messageID: String, senderPeerID: String) -> String? {
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static func encodePMForNostrNoRecipient(content: String, messageID: String, senderPeerID: PeerID) -> String? {
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let pm = PrivateMessagePacket(messageID: messageID, content: content)
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guard let tlv = pm.encode() else { return nil }
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@@ -84,7 +84,7 @@ struct NostrEmbeddedBitChat {
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let packet = BitchatPacket(
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type: MessageType.noiseEncrypted.rawValue,
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senderID: Data(hexString: senderPeerID) ?? Data(),
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senderID: Data(hexString: senderPeerID.id) ?? Data(),
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recipientID: nil,
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timestamp: UInt64(Date().timeIntervalSince1970 * 1000),
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payload: payload,
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@@ -96,11 +96,11 @@ struct NostrEmbeddedBitChat {
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return "bitchat1:" + base64URLEncode(data)
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}
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private static func normalizeRecipientPeerID(_ recipientPeerID: String) -> String {
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if let maybeData = Data(hexString: recipientPeerID) {
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private static func normalizeRecipientPeerID(_ recipientPeerID: PeerID) -> PeerID {
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if let maybeData = Data(hexString: recipientPeerID.id) {
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if maybeData.count == 32 {
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// Treat as Noise static public key; derive peerID from fingerprint
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return PeerID(publicKey: maybeData).id
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return PeerID(publicKey: maybeData)
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} else if maybeData.count == 8 {
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// Already an 8-byte peer ID
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return recipientPeerID
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@@ -82,7 +82,7 @@ final class NostrTransport: Transport {
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SecureLogger.error("NostrTransport: failed to decode npub -> hex: \(error)", category: .session)
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return
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}
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guard let embedded = NostrEmbeddedBitChat.encodePMForNostr(content: content, messageID: messageID, recipientPeerID: peerID.id, senderPeerID: senderPeerID.id) else {
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guard let embedded = NostrEmbeddedBitChat.encodePMForNostr(content: content, messageID: messageID, recipientPeerID: peerID, senderPeerID: senderPeerID) else {
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SecureLogger.error("NostrTransport: failed to embed PM packet", category: .session)
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return
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}
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@@ -114,7 +114,7 @@ final class NostrTransport: Transport {
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guard hrp == "npub" else { return }
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recipientHex = data.hexEncodedString()
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} catch { return }
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guard let embedded = NostrEmbeddedBitChat.encodePMForNostr(content: content, messageID: UUID().uuidString, recipientPeerID: peerID.id, senderPeerID: senderPeerID.id) else {
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guard let embedded = NostrEmbeddedBitChat.encodePMForNostr(content: content, messageID: UUID().uuidString, recipientPeerID: peerID, senderPeerID: senderPeerID) else {
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SecureLogger.error("NostrTransport: failed to embed favorite notification", category: .session)
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return
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}
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@@ -139,7 +139,7 @@ final class NostrTransport: Transport {
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guard hrp == "npub" else { return }
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recipientHex = data.hexEncodedString()
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} catch { return }
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guard let ack = NostrEmbeddedBitChat.encodeAckForNostr(type: .delivered, messageID: messageID, recipientPeerID: peerID.id, senderPeerID: senderPeerID.id) else {
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guard let ack = NostrEmbeddedBitChat.encodeAckForNostr(type: .delivered, messageID: messageID, recipientPeerID: peerID, senderPeerID: senderPeerID) else {
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SecureLogger.error("NostrTransport: failed to embed DELIVERED ack", category: .session)
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return
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}
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@@ -161,7 +161,7 @@ extension NostrTransport {
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func sendDeliveryAckGeohash(for messageID: String, toRecipientHex recipientHex: String, from identity: NostrIdentity) {
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Task { @MainActor in
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SecureLogger.debug("GeoDM: send DELIVERED -> recip=\(recipientHex.prefix(8))… mid=\(messageID.prefix(8))… from=\(identity.publicKeyHex.prefix(8))…", category: .session)
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guard let embedded = NostrEmbeddedBitChat.encodeAckForNostrNoRecipient(type: .delivered, messageID: messageID, senderPeerID: senderPeerID.id) else { return }
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guard let embedded = NostrEmbeddedBitChat.encodeAckForNostrNoRecipient(type: .delivered, messageID: messageID, senderPeerID: senderPeerID) else { return }
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guard let event = try? NostrProtocol.createPrivateMessage(content: embedded, recipientPubkey: recipientHex, senderIdentity: identity) else { return }
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NostrRelayManager.registerPendingGiftWrap(id: event.id)
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NostrRelayManager.shared.sendEvent(event)
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@@ -171,7 +171,7 @@ extension NostrTransport {
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func sendReadReceiptGeohash(_ messageID: String, toRecipientHex recipientHex: String, from identity: NostrIdentity) {
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Task { @MainActor in
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SecureLogger.debug("GeoDM: send READ -> recip=\(recipientHex.prefix(8))… mid=\(messageID.prefix(8))… from=\(identity.publicKeyHex.prefix(8))…", category: .session)
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guard let embedded = NostrEmbeddedBitChat.encodeAckForNostrNoRecipient(type: .readReceipt, messageID: messageID, senderPeerID: senderPeerID.id) else { return }
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guard let embedded = NostrEmbeddedBitChat.encodeAckForNostrNoRecipient(type: .readReceipt, messageID: messageID, senderPeerID: senderPeerID) else { return }
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guard let event = try? NostrProtocol.createPrivateMessage(content: embedded, recipientPubkey: recipientHex, senderIdentity: identity) else { return }
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NostrRelayManager.registerPendingGiftWrap(id: event.id)
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NostrRelayManager.shared.sendEvent(event)
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@@ -184,7 +184,7 @@ extension NostrTransport {
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guard !recipientHex.isEmpty else { return }
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SecureLogger.debug("GeoDM: send PM -> recip=\(recipientHex.prefix(8))… mid=\(messageID.prefix(8))… from=\(identity.publicKeyHex.prefix(8))…", category: .session)
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// Build embedded BitChat packet without recipient peer ID
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guard let embedded = NostrEmbeddedBitChat.encodePMForNostrNoRecipient(content: content, messageID: messageID, senderPeerID: senderPeerID.id) else {
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guard let embedded = NostrEmbeddedBitChat.encodePMForNostrNoRecipient(content: content, messageID: messageID, senderPeerID: senderPeerID) else {
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SecureLogger.error("NostrTransport: failed to embed geohash PM packet", category: .session)
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return
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}
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@@ -223,7 +223,7 @@ extension NostrTransport {
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guard hrp == "npub" else { scheduleNextReadAck(); return }
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recipientHex = data.hexEncodedString()
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} catch { scheduleNextReadAck(); return }
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guard let ack = NostrEmbeddedBitChat.encodeAckForNostr(type: .readReceipt, messageID: item.receipt.originalMessageID, recipientPeerID: item.peerID.id, senderPeerID: senderPeerID.id) else {
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guard let ack = NostrEmbeddedBitChat.encodeAckForNostr(type: .readReceipt, messageID: item.receipt.originalMessageID, recipientPeerID: item.peerID, senderPeerID: senderPeerID) else {
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SecureLogger.error("NostrTransport: failed to embed READ ack", category: .session)
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scheduleNextReadAck(); return
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}
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@@ -126,7 +126,7 @@ struct NostrProtocolTests {
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// Build a DELIVERED ack embedded payload (geohash-style, no recipient peer ID)
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let messageID = "TEST-MSG-DELIVERED-1"
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let senderPeerID = "0123456789abcdef" // 8-byte hex peer ID
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let senderPeerID = PeerID(str: "0123456789abcdef") // 8-byte hex peer ID
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let embedded = try #require(
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NostrEmbeddedBitChat.encodeAckForNostrNoRecipient(type: .delivered, messageID: messageID, senderPeerID: senderPeerID),
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@@ -176,7 +176,7 @@ struct NostrProtocolTests {
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let recipient = try NostrIdentity.generate()
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let messageID = "TEST-MSG-READ-1"
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let senderPeerID = "fedcba9876543210" // 8-byte hex peer ID
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let senderPeerID = PeerID(str: "fedcba9876543210") // 8-byte hex peer ID
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let embedded = try #require(
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NostrEmbeddedBitChat.encodeAckForNostrNoRecipient(type: .readReceipt, messageID: messageID, senderPeerID: senderPeerID),
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"Failed to embed read ack"
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