diff --git a/file_store/src/file_info.rs b/file_store/src/file_info.rs
index a307bbfd1..318ce8de3 100644
--- a/file_store/src/file_info.rs
+++ b/file_store/src/file_info.rs
@@ -165,7 +165,7 @@ pub const SUBSCRIBER_VERIFIED_MAPPING_INGEST_REPORT: &str =
 pub const VERIFIED_SUBSCRIBER_VERIFIED_MAPPING_INGEST_REPORT: &str =
     "verified_subscriber_verified_mapping_ingest_report";
 pub const PROMOTION_REWARD_INGEST_REPORT: &str = "promotion_reward_ingest_report";
-pub const VERIFIED_PROMOTION_REWARD_INGEST_REPORT: &str = "verified_promotion_reward_ingest_report";
+pub const VERIFIED_PROMOTION_REWARD: &str = "verified_promotion_reward";
 
 #[derive(Debug, PartialEq, Eq, Clone, Serialize, Copy, strum::EnumCount)]
 #[serde(rename_all = "snake_case")]
@@ -223,7 +223,7 @@ pub enum FileType {
     SubscriberVerifiedMappingEventIngestReport,
     VerifiedSubscriberVerifiedMappingEventIngestReport,
     PromotionRewardIngestReport,
-    VerifiedPromotionRewardIngestReport,
+    VerifiedPromotionReward,
 }
 
 impl fmt::Display for FileType {
@@ -296,7 +296,7 @@ impl fmt::Display for FileType {
                 VERIFIED_SUBSCRIBER_VERIFIED_MAPPING_INGEST_REPORT
             }
             Self::PromotionRewardIngestReport => PROMOTION_REWARD_INGEST_REPORT,
-            Self::VerifiedPromotionRewardIngestReport => VERIFIED_PROMOTION_REWARD_INGEST_REPORT,
+            Self::VerifiedPromotionReward => VERIFIED_PROMOTION_REWARD,
         };
         f.write_str(s)
     }
@@ -372,7 +372,7 @@ impl FileType {
                 VERIFIED_SUBSCRIBER_VERIFIED_MAPPING_INGEST_REPORT
             }
             Self::PromotionRewardIngestReport => PROMOTION_REWARD_INGEST_REPORT,
-            Self::VerifiedPromotionRewardIngestReport => VERIFIED_PROMOTION_REWARD_INGEST_REPORT,
+            Self::VerifiedPromotionReward => VERIFIED_PROMOTION_REWARD,
         }
     }
 }
@@ -448,7 +448,7 @@ impl FromStr for FileType {
                 Self::VerifiedSubscriberVerifiedMappingEventIngestReport
             }
             PROMOTION_REWARD_INGEST_REPORT => Self::PromotionRewardIngestReport,
-            VERIFIED_PROMOTION_REWARD_INGEST_REPORT => Self::VerifiedPromotionRewardIngestReport,
+            VERIFIED_PROMOTION_REWARD => Self::VerifiedPromotionReward,
             _ => return Err(Error::from(io::Error::from(io::ErrorKind::InvalidInput))),
         };
         Ok(result)
diff --git a/file_store/src/traits/file_sink_write.rs b/file_store/src/traits/file_sink_write.rs
index fcd539cc7..b80892a43 100644
--- a/file_store/src/traits/file_sink_write.rs
+++ b/file_store/src/traits/file_sink_write.rs
@@ -247,3 +247,13 @@ impl_file_sink!(
     FileType::RewardManifest.to_str(),
     "reward_manifest"
 );
+impl_file_sink!(
+    poc_mobile::PromotionRewardIngestReportV1,
+    FileType::PromotionRewardIngestReport.to_str(),
+    "promotion_reward_ingest_report"
+);
+impl_file_sink!(
+    poc_mobile::VerifiedPromotionRewardV1,
+    FileType::VerifiedPromotionReward.to_str(),
+    "verified_promotion_reward"
+);
diff --git a/ingest/src/server_mobile.rs b/ingest/src/server_mobile.rs
index 5e57c0d4d..1bfd2d7e1 100644
--- a/ingest/src/server_mobile.rs
+++ b/ingest/src/server_mobile.rs
@@ -460,10 +460,7 @@ impl poc_mobile::PocMobile for GrpcServer {
                 report: Some(event),
             })?;
 
-        let _ = self
-            .promotion_reward_sink
-            .write(report, [])
-            .await;
+        let _ = self.promotion_reward_sink.write(report, []).await;
 
         let id = received_timestamp.to_string();
         Ok(Response::new(PromotionRewardRespV1 { id }))
@@ -568,17 +565,12 @@ pub async fn grpc_server(settings: &Settings) -> Result<()> {
         .await?;
 
     let (subscriber_referral_eligibility_sink, subscriber_referral_eligibility_server) =
-        file_sink::FileSinkBuilder::new(
-            FileType::PromotionRewardIngestReport,
+        PromotionRewardIngestReportV1::file_sink(
             store_base_path,
             file_upload.clone(),
-            concat!(
-                env!("CARGO_PKG_NAME"),
-                "_subscriber_referral_eligibility_ingest_report"
-            ),
+            Some(settings.roll_time),
+            env!("CARGO_PKG_NAME"),
         )
-        .roll_time(settings.roll_time)
-        .create()
         .await?;
 
     let Some(api_token) = settings
diff --git a/mobile_verifier/src/promotion_reward.rs b/mobile_verifier/src/promotion_reward.rs
index 0784d88b0..25fafe189 100644
--- a/mobile_verifier/src/promotion_reward.rs
+++ b/mobile_verifier/src/promotion_reward.rs
@@ -1,11 +1,11 @@
 use chrono::{DateTime, Utc};
 use file_store::{
     file_info_poller::{FileInfoStream, LookbackBehavior},
-    file_sink::{self, FileSinkClient},
+    file_sink::FileSinkClient,
     file_source,
     file_upload::FileUpload,
     promotion_reward::{Entity, PromotionReward},
-    traits::TimestampEncode,
+    traits::{FileSinkWriteExt, TimestampEncode},
     FileType,
 };
 use futures::{Stream, StreamExt, TryFutureExt, TryStreamExt};
@@ -35,7 +35,7 @@ pub struct PromotionRewardDaemon {
     pool: PgPool,
     carrier_client: CarrierServiceClient,
     promotion_rewards: Receiver<FileInfoStream<PromotionReward>>,
-    promotion_rewards_sink: FileSinkClient,
+    promotion_rewards_sink: FileSinkClient<VerifiedPromotionRewardV1>,
 }
 
 impl PromotionRewardDaemon {
@@ -47,15 +47,12 @@ impl PromotionRewardDaemon {
         carrier_client: CarrierServiceClient,
     ) -> anyhow::Result<impl ManagedTask> {
         let (promotion_rewards_sink, valid_promotion_rewards_server) =
-            file_sink::FileSinkBuilder::new(
-                FileType::VerifiedPromotionRewardIngestReport,
+            VerifiedPromotionRewardV1::file_sink(
                 settings.store_base_path(),
                 file_upload.clone(),
-                concat!(env!("CARGO_PKG_NAME"), "_promotion_reward"),
+                Some(Duration::from_secs(15 * 60)),
+                env!("CARGO_PKG_NAME"),
             )
-            .auto_commit(false)
-            .roll_time(Duration::from_secs(15 * 60))
-            .create()
             .await?;
 
         let (promotion_rewards, promotion_rewards_server) =
@@ -183,7 +180,10 @@ impl VerifiedPromotionReward {
         matches!(self.validity, PromotionRewardStatus::Valid)
     }
 
-    async fn write(&self, promotion_rewards: &FileSinkClient) -> anyhow::Result<()> {
+    async fn write(
+        &self,
+        promotion_rewards: &FileSinkClient<VerifiedPromotionRewardV1>,
+    ) -> anyhow::Result<()> {
         promotion_rewards
             .write(
                 VerifiedPromotionRewardV1 {