import 'package:flutter/material.dart'; import 'package:flutter_udid/flutter_udid.dart'; import 'package:loc_chain_app/util/keyfile_manager.dart'; class Transaction { Transaction({required this.hash, required this.pubKey}); final String hash; final String pubKey; static Future generateHash(String otherUserId) async { String id = await FlutterUdid.consistentUdid; bool idLess = id.compareTo(otherUserId) < 0; var lesser = idLess ? id : otherUserId; var greater = idLess ? otherUserId : id; // return DBCrypt() // .hashpw("$lesser-$greater", KeyFileManager.keyPair.privateKey); return "$lesser-$greater"; } Future generateP2PPayload(String otherUserId) async => "${await generateHash(otherUserId)}:${KeyFileManager.keyPair.publicKey}"; } class EncounterTransaction { EncounterTransaction({ required this.combinedHash, required this.encodedGPSLocation, required this.partnerPublicKey, required this.validationSignature, }) : timestamp = "${DateTime.now().millisecondsSinceEpoch}"; final String combinedHash; final String timestamp; final String encodedGPSLocation; final String partnerPublicKey; final String validationSignature; EncounterTransaction.fromJson(Map json) : combinedHash = json['combinedHash'], timestamp = json['timestamp'], encodedGPSLocation = json['encodedGPSLocation'], partnerPublicKey = json['partnerPublicKey'], validationSignature = json['validationSignature']; Map toJson() => { "combinedHash": combinedHash, "timestamp": timestamp, "encodedGPSLocation": encodedGPSLocation, "partnerPublicKey": partnerPublicKey, "validationSignature": validationSignature, }; } class ExposureTransaction { final String clientID; final String timestamp; ExposureTransaction({ required this.clientID, }) : timestamp = "${DateTime.now().millisecondsSinceEpoch}"; ExposureTransaction.fromJson(Map json) : clientID = json['clientID'], timestamp = json['timestamp']; Map toJson() => { "clientID": clientID, "timestamp": timestamp, }; }