mirror of
https://gitlab.com/veilid/veilidchat.git
synced 2025-08-02 19:26:16 -04:00
refactoring
This commit is contained in:
Christien Rioux
parent
d3ecae0113
commit
e898074387
12 changed files with 1100 additions and 822 deletions
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@ -13,509 +13,6 @@ import 'conversation.dart';
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part 'contact_invite.g.dart';
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class ContactInviteInvalidKeyException implements Exception {
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const ContactInviteInvalidKeyException(this.type) : super();
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final EncryptionKeyType type;
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}
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class AcceptedContact {
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AcceptedContact({
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required this.profile,
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required this.remoteIdentity,
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required this.remoteConversationRecordKey,
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required this.localConversationRecordKey,
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});
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proto.Profile profile;
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IdentityMaster remoteIdentity;
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TypedKey remoteConversationRecordKey;
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TypedKey localConversationRecordKey;
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}
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class AcceptedOrRejectedContact {
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AcceptedOrRejectedContact({required this.acceptedContact});
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AcceptedContact? acceptedContact;
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}
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Future<AcceptedOrRejectedContact?> checkAcceptRejectContact(
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{required ActiveAccountInfo activeAccountInfo,
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required proto.ContactInvitationRecord contactInvitationRecord}) async {
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// Open the contact request inbox
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try {
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final pool = await DHTRecordPool.instance();
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final accountRecordKey =
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activeAccountInfo.userLogin.accountRecordInfo.accountRecord.recordKey;
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final writerKey =
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proto.CryptoKeyProto.fromProto(contactInvitationRecord.writerKey);
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final writerSecret =
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proto.CryptoKeyProto.fromProto(contactInvitationRecord.writerSecret);
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final recordKey = proto.TypedKeyProto.fromProto(
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contactInvitationRecord.contactRequestInbox.recordKey);
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final writer = TypedKeyPair(
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kind: recordKey.kind, key: writerKey, secret: writerSecret);
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final acceptReject = await (await pool.openRead(recordKey,
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crypto: await DHTRecordCryptoPrivate.fromTypedKeyPair(writer),
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parent: accountRecordKey,
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defaultSubkey: 1))
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.scope((contactRequestInbox) async {
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//
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final signedContactResponse = await contactRequestInbox.getProtobuf(
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proto.SignedContactResponse.fromBuffer,
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forceRefresh: true);
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if (signedContactResponse == null) {
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return null;
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}
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final contactResponseBytes =
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Uint8List.fromList(signedContactResponse.contactResponse);
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final contactResponse =
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proto.ContactResponse.fromBuffer(contactResponseBytes);
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final contactIdentityMasterRecordKey = proto.TypedKeyProto.fromProto(
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contactResponse.identityMasterRecordKey);
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final cs = await pool.veilid.getCryptoSystem(recordKey.kind);
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// Fetch the remote contact's account master
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final contactIdentityMaster = await openIdentityMaster(
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identityMasterRecordKey: contactIdentityMasterRecordKey);
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// Verify
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final signature = proto.SignatureProto.fromProto(
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signedContactResponse.identitySignature);
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await cs.verify(contactIdentityMaster.identityPublicKey,
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contactResponseBytes, signature);
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// Check for rejection
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if (!contactResponse.accept) {
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return AcceptedOrRejectedContact(acceptedContact: null);
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}
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// Pull profile from remote conversation key
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final remoteConversationRecordKey = proto.TypedKeyProto.fromProto(
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contactResponse.remoteConversationRecordKey);
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final remoteConversation = await readRemoteConversation(
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activeAccountInfo: activeAccountInfo,
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remoteIdentityPublicKey:
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contactIdentityMaster.identityPublicTypedKey(),
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remoteConversationRecordKey: remoteConversationRecordKey);
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if (remoteConversation == null) {
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log.info('Remote conversation could not be read. Waiting...');
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return null;
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}
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// Complete the local conversation now that we have the remote profile
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final localConversationRecordKey = proto.TypedKeyProto.fromProto(
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contactInvitationRecord.localConversationRecordKey);
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return createConversation(
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activeAccountInfo: activeAccountInfo,
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remoteIdentityPublicKey:
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contactIdentityMaster.identityPublicTypedKey(),
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existingConversationRecordKey: localConversationRecordKey,
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// ignore: prefer_expression_function_bodies
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callback: (localConversation) async {
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return AcceptedOrRejectedContact(
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acceptedContact: AcceptedContact(
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profile: remoteConversation.profile,
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remoteIdentity: contactIdentityMaster,
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remoteConversationRecordKey: remoteConversationRecordKey,
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localConversationRecordKey: localConversationRecordKey));
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});
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});
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if (acceptReject == null) {
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return null;
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}
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// Delete invitation and return the accepted or rejected contact
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await deleteContactInvitation(
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accepted: acceptReject.acceptedContact != null,
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activeAccountInfo: activeAccountInfo,
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contactInvitationRecord: contactInvitationRecord);
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return acceptReject;
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} on Exception catch (e) {
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log.error('Exception in checkAcceptRejectContact: $e', e);
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// Attempt to clean up. All this needs better lifetime management
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await deleteContactInvitation(
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accepted: false,
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activeAccountInfo: activeAccountInfo,
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contactInvitationRecord: contactInvitationRecord);
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rethrow;
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}
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}
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Future<void> deleteContactInvitation(
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{required bool accepted,
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required ActiveAccountInfo activeAccountInfo,
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required proto.ContactInvitationRecord contactInvitationRecord}) async {
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final pool = await DHTRecordPool.instance();
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final accountRecordKey =
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activeAccountInfo.userLogin.accountRecordInfo.accountRecord.recordKey;
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// Remove ContactInvitationRecord from account's list
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await (await DHTShortArray.openOwned(
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proto.OwnedDHTRecordPointerProto.fromProto(
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activeAccountInfo.account.contactInvitationRecords),
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parent: accountRecordKey))
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.scope((cirList) async {
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for (var i = 0; i < cirList.length; i++) {
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final item = await cirList.getItemProtobuf(
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proto.ContactInvitationRecord.fromBuffer, i);
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if (item == null) {
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throw Exception('Failed to get contact invitation record');
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}
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if (item.contactRequestInbox.recordKey ==
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contactInvitationRecord.contactRequestInbox.recordKey) {
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await cirList.tryRemoveItem(i);
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break;
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}
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}
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await (await pool.openOwned(
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proto.OwnedDHTRecordPointerProto.fromProto(
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contactInvitationRecord.contactRequestInbox),
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parent: accountRecordKey))
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.scope((contactRequestInbox) async {
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// Wipe out old invitation so it shows up as invalid
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await contactRequestInbox.tryWriteBytes(Uint8List(0));
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await contactRequestInbox.delete();
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});
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if (!accepted) {
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await (await pool.openRead(
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proto.TypedKeyProto.fromProto(
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contactInvitationRecord.localConversationRecordKey),
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parent: accountRecordKey))
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.delete();
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}
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});
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}
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Future<Uint8List> createContactInvitation(
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{required ActiveAccountInfo activeAccountInfo,
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required EncryptionKeyType encryptionKeyType,
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required String encryptionKey,
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required String message,
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required Timestamp? expiration}) async {
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final pool = await DHTRecordPool.instance();
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final accountRecordKey =
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activeAccountInfo.userLogin.accountRecordInfo.accountRecord.recordKey;
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final identityKey =
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activeAccountInfo.localAccount.identityMaster.identityPublicKey;
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final identitySecret = activeAccountInfo.userLogin.identitySecret.value;
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// Generate writer keypair to share with new contact
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final cs = await pool.veilid.bestCryptoSystem();
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final contactRequestWriter = await cs.generateKeyPair();
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final conversationWriter =
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getConversationWriter(activeAccountInfo: activeAccountInfo);
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// Encrypt the writer secret with the encryption key
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final encryptedSecret = await encryptSecretToBytes(
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secret: contactRequestWriter.secret,
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cryptoKind: cs.kind(),
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encryptionKey: encryptionKey,
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encryptionKeyType: encryptionKeyType);
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// Create local chat DHT record with the account record key as its parent
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// Do not set the encryption of this key yet as it will not yet be written
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// to and it will be eventually encrypted with the DH of the contact's
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// identity key
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late final Uint8List signedContactInvitationBytes;
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await (await pool.create(
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parent: accountRecordKey,
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schema: DHTSchema.smpl(oCnt: 0, members: [
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DHTSchemaMember(mKey: conversationWriter.key, mCnt: 1)
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])))
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.deleteScope((localConversation) async {
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// dont bother reopening localConversation with writer
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// Make ContactRequestPrivate and encrypt with the writer secret
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final crpriv = proto.ContactRequestPrivate()
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..writerKey = contactRequestWriter.key.toProto()
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..profile = activeAccountInfo.account.profile
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..identityMasterRecordKey =
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activeAccountInfo.userLogin.accountMasterRecordKey.toProto()
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..chatRecordKey = localConversation.key.toProto()
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..expiration = expiration?.toInt64() ?? Int64.ZERO;
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final crprivbytes = crpriv.writeToBuffer();
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final encryptedContactRequestPrivate =
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await cs.encryptAeadWithNonce(crprivbytes, contactRequestWriter.secret);
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// Create ContactRequest and embed contactrequestprivate
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final creq = proto.ContactRequest()
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..encryptionKeyType = encryptionKeyType.toProto()
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..private = encryptedContactRequestPrivate;
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// Create DHT unicast inbox for ContactRequest
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await (await pool.create(
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parent: accountRecordKey,
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schema: DHTSchema.smpl(oCnt: 1, members: [
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DHTSchemaMember(mCnt: 1, mKey: contactRequestWriter.key)
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]),
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crypto: const DHTRecordCryptoPublic()))
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.deleteScope((contactRequestInbox) async {
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// Store ContactRequest in owner subkey
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await contactRequestInbox.eventualWriteProtobuf(creq);
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// Create ContactInvitation and SignedContactInvitation
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final cinv = proto.ContactInvitation()
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..contactRequestInboxKey = contactRequestInbox.key.toProto()
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..writerSecret = encryptedSecret;
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final cinvbytes = cinv.writeToBuffer();
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final scinv = proto.SignedContactInvitation()
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..contactInvitation = cinvbytes
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..identitySignature =
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(await cs.sign(identityKey, identitySecret, cinvbytes)).toProto();
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signedContactInvitationBytes = scinv.writeToBuffer();
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// Create ContactInvitationRecord
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final cinvrec = proto.ContactInvitationRecord()
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..contactRequestInbox =
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contactRequestInbox.ownedDHTRecordPointer.toProto()
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..writerKey = contactRequestWriter.key.toProto()
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..writerSecret = contactRequestWriter.secret.toProto()
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..localConversationRecordKey = localConversation.key.toProto()
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..expiration = expiration?.toInt64() ?? Int64.ZERO
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..invitation = signedContactInvitationBytes
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..message = message;
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// Add ContactInvitationRecord to account's list
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// if this fails, don't keep retrying, user can try again later
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await (await DHTShortArray.openOwned(
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proto.OwnedDHTRecordPointerProto.fromProto(
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activeAccountInfo.account.contactInvitationRecords),
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parent: accountRecordKey))
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.scope((cirList) async {
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if (await cirList.tryAddItem(cinvrec.writeToBuffer()) == false) {
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throw Exception('Failed to add contact invitation record');
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}
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});
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});
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});
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return signedContactInvitationBytes;
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}
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class ValidContactInvitation {
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ValidContactInvitation(
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{required this.signedContactInvitation,
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required this.contactInvitation,
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required this.contactRequestInboxKey,
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required this.contactRequest,
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required this.contactRequestPrivate,
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required this.contactIdentityMaster,
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required this.writer});
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proto.SignedContactInvitation signedContactInvitation;
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proto.ContactInvitation contactInvitation;
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TypedKey contactRequestInboxKey;
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proto.ContactRequest contactRequest;
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proto.ContactRequestPrivate contactRequestPrivate;
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IdentityMaster contactIdentityMaster;
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KeyPair writer;
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}
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typedef GetEncryptionKeyCallback = Future<SecretKey?> Function(
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VeilidCryptoSystem cs,
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EncryptionKeyType encryptionKeyType,
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Uint8List encryptedSecret);
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Future<ValidContactInvitation?> validateContactInvitation(
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{required ActiveAccountInfo activeAccountInfo,
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required IList<proto.ContactInvitationRecord>? contactInvitationRecords,
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required Uint8List inviteData,
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required GetEncryptionKeyCallback getEncryptionKeyCallback}) async {
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final accountRecordKey =
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activeAccountInfo.userLogin.accountRecordInfo.accountRecord.recordKey;
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final signedContactInvitation =
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proto.SignedContactInvitation.fromBuffer(inviteData);
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final contactInvitationBytes =
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Uint8List.fromList(signedContactInvitation.contactInvitation);
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final contactInvitation =
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proto.ContactInvitation.fromBuffer(contactInvitationBytes);
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final contactRequestInboxKey =
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proto.TypedKeyProto.fromProto(contactInvitation.contactRequestInboxKey);
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ValidContactInvitation? out;
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final pool = await DHTRecordPool.instance();
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final cs = await pool.veilid.getCryptoSystem(contactRequestInboxKey.kind);
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// See if we're chatting to ourselves, if so, don't delete it here
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final isSelf = contactInvitationRecords?.indexWhere((cir) =>
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proto.TypedKeyProto.fromProto(cir.contactRequestInbox.recordKey) ==
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contactRequestInboxKey) !=
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-1;
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await (await pool.openRead(contactRequestInboxKey, parent: accountRecordKey))
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.maybeDeleteScope(!isSelf, (contactRequestInbox) async {
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//
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final contactRequest =
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await contactRequestInbox.getProtobuf(proto.ContactRequest.fromBuffer);
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// Decrypt contact request private
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final encryptionKeyType =
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EncryptionKeyType.fromProto(contactRequest!.encryptionKeyType);
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late final SharedSecret? writerSecret;
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try {
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writerSecret = await getEncryptionKeyCallback(cs, encryptionKeyType,
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Uint8List.fromList(contactInvitation.writerSecret));
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} on Exception catch (_) {
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throw ContactInviteInvalidKeyException(encryptionKeyType);
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}
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if (writerSecret == null) {
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return null;
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}
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final contactRequestPrivateBytes = await cs.decryptAeadWithNonce(
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Uint8List.fromList(contactRequest.private), writerSecret);
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final contactRequestPrivate =
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proto.ContactRequestPrivate.fromBuffer(contactRequestPrivateBytes);
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final contactIdentityMasterRecordKey = proto.TypedKeyProto.fromProto(
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contactRequestPrivate.identityMasterRecordKey);
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// Fetch the account master
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final contactIdentityMaster = await openIdentityMaster(
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identityMasterRecordKey: contactIdentityMasterRecordKey);
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// Verify
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final signature = proto.SignatureProto.fromProto(
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signedContactInvitation.identitySignature);
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await cs.verify(contactIdentityMaster.identityPublicKey,
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contactInvitationBytes, signature);
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final writer = KeyPair(
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key: proto.CryptoKeyProto.fromProto(contactRequestPrivate.writerKey),
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secret: writerSecret);
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out = ValidContactInvitation(
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signedContactInvitation: signedContactInvitation,
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contactInvitation: contactInvitation,
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contactRequestInboxKey: contactRequestInboxKey,
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contactRequest: contactRequest,
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contactRequestPrivate: contactRequestPrivate,
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contactIdentityMaster: contactIdentityMaster,
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writer: writer);
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});
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return out;
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}
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Future<AcceptedContact?> acceptContactInvitation(
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ActiveAccountInfo activeAccountInfo,
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ValidContactInvitation validContactInvitation) async {
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final pool = await DHTRecordPool.instance();
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try {
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// Ensure we don't delete this if we're trying to chat to self
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final isSelf =
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validContactInvitation.contactIdentityMaster.identityPublicKey ==
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activeAccountInfo.localAccount.identityMaster.identityPublicKey;
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final accountRecordKey =
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activeAccountInfo.userLogin.accountRecordInfo.accountRecord.recordKey;
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return (await pool.openWrite(validContactInvitation.contactRequestInboxKey,
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validContactInvitation.writer,
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parent: accountRecordKey))
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// ignore: prefer_expression_function_bodies
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.maybeDeleteScope(!isSelf, (contactRequestInbox) async {
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// Create local conversation key for this
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// contact and send via contact response
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return createConversation(
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activeAccountInfo: activeAccountInfo,
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remoteIdentityPublicKey: validContactInvitation.contactIdentityMaster
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.identityPublicTypedKey(),
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callback: (localConversation) async {
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final contactResponse = proto.ContactResponse()
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..accept = true
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..remoteConversationRecordKey = localConversation.key.toProto()
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..identityMasterRecordKey = activeAccountInfo
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.localAccount.identityMaster.masterRecordKey
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.toProto();
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final contactResponseBytes = contactResponse.writeToBuffer();
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final cs = await pool.veilid.getCryptoSystem(
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validContactInvitation.contactRequestInboxKey.kind);
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final identitySignature = await cs.sign(
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activeAccountInfo.localAccount.identityMaster.identityPublicKey,
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activeAccountInfo.userLogin.identitySecret.value,
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contactResponseBytes);
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final signedContactResponse = proto.SignedContactResponse()
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..contactResponse = contactResponseBytes
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..identitySignature = identitySignature.toProto();
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// Write the acceptance to the inbox
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if (await contactRequestInbox.tryWriteProtobuf(
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proto.SignedContactResponse.fromBuffer,
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signedContactResponse,
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subkey: 1) !=
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null) {
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throw Exception('failed to accept contact invitation');
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}
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return AcceptedContact(
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profile: validContactInvitation.contactRequestPrivate.profile,
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remoteIdentity: validContactInvitation.contactIdentityMaster,
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remoteConversationRecordKey: proto.TypedKeyProto.fromProto(
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validContactInvitation.contactRequestPrivate.chatRecordKey),
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localConversationRecordKey: localConversation.key,
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);
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});
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});
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} on Exception catch (e) {
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log.debug('exception: $e', e);
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return null;
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}
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}
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Future<bool> rejectContactInvitation(ActiveAccountInfo activeAccountInfo,
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ValidContactInvitation validContactInvitation) async {
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final pool = await DHTRecordPool.instance();
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// Ensure we don't delete this if we're trying to chat to self
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final isSelf =
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validContactInvitation.contactIdentityMaster.identityPublicKey ==
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activeAccountInfo.localAccount.identityMaster.identityPublicKey;
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final accountRecordKey =
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activeAccountInfo.userLogin.accountRecordInfo.accountRecord.recordKey;
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return (await pool.openWrite(validContactInvitation.contactRequestInboxKey,
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validContactInvitation.writer,
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parent: accountRecordKey))
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.maybeDeleteScope(!isSelf, (contactRequestInbox) async {
|
||||
final cs = await pool.veilid
|
||||
.getCryptoSystem(validContactInvitation.contactRequestInboxKey.kind);
|
||||
|
||||
final contactResponse = proto.ContactResponse()
|
||||
..accept = false
|
||||
..identityMasterRecordKey = activeAccountInfo
|
||||
.localAccount.identityMaster.masterRecordKey
|
||||
.toProto();
|
||||
final contactResponseBytes = contactResponse.writeToBuffer();
|
||||
|
||||
final identitySignature = await cs.sign(
|
||||
activeAccountInfo.localAccount.identityMaster.identityPublicKey,
|
||||
activeAccountInfo.userLogin.identitySecret.value,
|
||||
contactResponseBytes);
|
||||
|
||||
final signedContactResponse = proto.SignedContactResponse()
|
||||
..contactResponse = contactResponseBytes
|
||||
..identitySignature = identitySignature.toProto();
|
||||
|
||||
// Write the rejection to the inbox
|
||||
if (await contactRequestInbox.tryWriteProtobuf(
|
||||
proto.SignedContactResponse.fromBuffer, signedContactResponse,
|
||||
subkey: 1) !=
|
||||
null) {
|
||||
log.error('failed to reject contact invitation');
|
||||
return false;
|
||||
}
|
||||
return true;
|
||||
});
|
||||
}
|
||||
|
||||
/// Get the active account contact invitation list
|
||||
@riverpod
|
||||
Future<IList<proto.ContactInvitationRecord>?> fetchContactInvitationRecords(
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue