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GEConfig *config = [GEConfig new];
config.appid = "APP_ID";
config.accessToken = "ACCESS_TOKEN";
[GravityEngineSDK startWithConfig:config];
GravityEngineSDK *instance = [GravityEngineSDK sharedInstanceWithAppid:config.appid];

[instance initializeGravityEngineWithClientId:@"" withCaidInfo:caidStr withSyncAttribution:NO withChannel:@"appstore" withAdData:@{} withSuccessCallback:^(NSDictionary * _Nonnull response) {
    NSLog(@"gravity engine initialize success, response is %@", response);
} withErrorCallback:^(NSError * _Nonnull error) {
    NSLog(@"gravity engine initialize failed, and error is %@", error);
}];

[instance trackPayEventWithAmount:1000 withPayType:@"CNY" withOrderId:@"order_id_xxx1" withPayReason:@"月卡" withPayMethod:@"支付宝"];
[instance trackAdShowEventWithUninType:@"topon" withPlacementId:@"placement_id" withSourceId:@"ad_source_id" withAdType:@"reward" withAdnType:@"csj" withEcpm:@1000];

NSDictionary *eventProperties = @{ @"product_name": @"商品名"};
[instance track:@"product_buy" properties:eventProperties];
[instance user_increment:@{@"$age": @30}];
[instance flush];