Issue:
Bug: [Kafka] - Consolidate payment logs into a single topic for sessionizing



Consolidate intent, attempt, dispute, refund events into a single topic `hyperswitch-consolidated-events` for sessionizer to consume

#### Initial log structure
```json
{
  "log": {
    "merchant_id": "test",
    "payment_id": "p1",
    "attempt_id": "a1",
    ...
  }
  "log_type": "payment_attempt"
}
```


Pull request description:
## Type of Change
<!-- Put an `x` in the boxes that apply -->

- [ ] Bugfix
- [ ] New feature
- [x] Enhancement
- [ ] Refactoring
- [ ] Dependency updates
- [ ] Documentation
- [ ] CI/CD

## Description
- add consolidated payment events to a single topic for sessionizing
- add millisecond precision to timestamp fields


### Additional Changes

- [ ] This PR modifies the API contract
- [ ] This PR modifies the database schema
- [x] This PR modifies application configuration/environment variables

<!--
Provide links to the files with corresponding changes.

Following are the paths where you can find config files:
1. `config`
2. `crates/router/src/configs`
3. `loadtest/config`
-->


## Motivation and Context
[#4797](https://github.com/juspay/hyperswitch/issues/4797)


## How did you test it?
- Create payment, refund, dispute
- check `topic: hyperswitch-consolidated-events` for combined logs for above events
![Screenshot 2024-05-28 at 7 43 24 PM](https://github.com/juspay/hyperswitch/assets/138492857/9cb3bf17-a0aa-4ce0-9a41-30bde996c3ef)
![Screenshot 2024-05-28 at 7 44 04 PM](https://github.com/juspay/hyperswitch/assets/138492857/7573ce27-19f0-4ae7-a138-a28098c3cd3f)




## Checklist
<!-- Put an `x` in the boxes that apply -->

- [x] I formatted the code `cargo +nightly fmt --all`
- [x] I addressed lints thrown by `cargo clippy`
- [ ] I reviewed the submitted code
- [ ] I added unit tests for my changes where possible


Testing:
- Create payment, refund, dispute
- check `topic: hyperswitch-consolidated-events` for combined logs for above events
![Screenshot 2024-05-28 at 7 43 24 PM](https://github.com/juspay/hyperswitch/assets/138492857/9cb3bf17-a0aa-4ce0-9a41-30bde996c3ef)
![Screenshot 2024-05-28 at 7 44 04 PM](https://github.com/juspay/hyperswitch/assets/138492857/7573ce27-19f0-4ae7-a138-a28098c3cd3f)

Patch:
diff --git a/config/config.example.toml b/config/config.example.toml
index 5433d7a8e46..5d40d0e55ef 100644
--- a/config/config.example.toml
+++ b/config/config.example.toml
@@ -263,8 +263,7 @@ stripe = { banks = "alior_bank,bank_millennium,bank_nowy_bfg_sa,bank_pekao_sa,ba
 
 # This data is used to call respective connectors for wallets and cards
 [connectors.supported]
-wallets = ["klarna",
-    "mifinity", "braintree", "applepay"]
+wallets = ["klarna", "mifinity", "braintree", "applepay"]
 rewards = ["cashtocode", "zen"]
 cards = [
     "adyen",
@@ -352,8 +351,8 @@ email_role_arn = ""        # The amazon resource name ( arn ) of the role which
 sts_role_session_name = "" # An identifier for the assumed role session, used to uniquely identify a session.
 
 [user]
-password_validity_in_days = 90             # Number of days after which password should be updated
-two_factor_auth_expiry_in_secs = 300       # Number of seconds after which 2FA should be done again if doing update/change from inside
+password_validity_in_days = 90       # Number of days after which password should be updated
+two_factor_auth_expiry_in_secs = 300 # Number of seconds after which 2FA should be done again if doing update/change from inside
 
 #tokenization configuration which describe token lifetime and payment method for specific connector
 [tokenization]
@@ -364,7 +363,7 @@ stax = { long_lived_token = true, payment_method = "card,bank_debit" }
 square = { long_lived_token = false, payment_method = "card" }
 braintree = { long_lived_token = false, payment_method = "card" }
 gocardless = { long_lived_token = true, payment_method = "bank_debit" }
-billwerk = {long_lived_token = false, payment_method = "card"}
+billwerk = { long_lived_token = false, payment_method = "card" }
 
 [temp_locker_enable_config]
 stripe = { payment_method = "bank_transfer" }
@@ -397,16 +396,16 @@ slack_invite_url = "https://www.example.com/"   # Slack invite url for hyperswit
 discord_invite_url = "https://www.example.com/" # Discord invite url for hyperswitch
 
 [mandates.supported_payment_methods]
-card.credit = { connector_list = "stripe,adyen,cybersource,bankofamerica"}           # Mandate supported payment method type and connector for card
-wallet.paypal = { connector_list = "adyen" }                            # Mandate supported payment method type and connector for wallets
-pay_later.klarna = { connector_list = "adyen" }                         # Mandate supported payment method type and connector for pay_later
-bank_debit.ach = { connector_list = "gocardless" }                      # Mandate supported payment method type and connector for bank_debit
-bank_debit.becs = { connector_list = "gocardless" }                     # Mandate supported payment method type and connector for bank_debit
-bank_debit.sepa = { connector_list = "gocardless" }                     # Mandate supported payment method type and connector for bank_debit
-bank_redirect.ideal = { connector_list = "stripe,adyen,globalpay" }     # Mandate supported payment method type and connector for bank_redirect
+card.credit = { connector_list = "stripe,adyen,cybersource,bankofamerica" }           # Mandate supported payment method type and connector for card
+wallet.paypal = { connector_list = "adyen" }                                          # Mandate supported payment method type and connector for wallets
+pay_later.klarna = { connector_list = "adyen" }                                       # Mandate supported payment method type and connector for pay_later
+bank_debit.ach = { connector_list = "gocardless" }                                    # Mandate supported payment method type and connector for bank_debit
+bank_debit.becs = { connector_list = "gocardless" }                                   # Mandate supported payment method type and connector for bank_debit
+bank_debit.sepa = { connector_list = "gocardless" }                                   # Mandate supported payment method type and connector for bank_debit
+bank_redirect.ideal = { connector_list = "stripe,adyen,globalpay" }                   # Mandate supported payment method type and connector for bank_redirect
 bank_redirect.sofort = { connector_list = "stripe,adyen,globalpay" }
 wallet.apple_pay = { connector_list = "stripe,adyen,cybersource,noon,bankofamerica" }
-wallet.google_pay = { connector_list = "bankofamerica"}
+wallet.google_pay = { connector_list = "bankofamerica" }
 bank_redirect.giropay = { connector_list = "adyen,globalpay" }
 
 
@@ -589,6 +588,7 @@ outgoing_webhook_logs_topic = "topic" # Kafka topic to be used for outgoing webh
 dispute_analytics_topic = "topic"     # Kafka topic to be used for Dispute events
 audit_events_topic = "topic"          # Kafka topic to be used for Payment Audit events
 payout_analytics_topic = "topic"      # Kafka topic to be used for Payouts and PayoutAttempt events
+consolidated_events_topic = "topic"   # Kafka topic to be used for Consolidated events
 
 # File storage configuration
 [file_storage]
diff --git a/config/deployments/env_specific.toml b/config/deployments/env_specific.toml
index fc02335dcf5..7215e1931a4 100644
--- a/config/deployments/env_specific.toml
+++ b/config/deployments/env_specific.toml
@@ -81,6 +81,7 @@ outgoing_webhook_logs_topic = "topic" # Kafka topic to be used for outgoing webh
 dispute_analytics_topic = "topic"     # Kafka topic to be used for Dispute events
 audit_events_topic = "topic"          # Kafka topic to be used for Payment Audit events
 payout_analytics_topic = "topic"      # Kafka topic to be used for Payouts and PayoutAttempt events
+consolidated_events_topic = "topic"   # Kafka topic to be used for Consolidated events
 
 # File storage configuration
 [file_storage]
diff --git a/config/development.toml b/config/development.toml
index 56d74e67489..496ce6477a8 100644
--- a/config/development.toml
+++ b/config/development.toml
@@ -89,8 +89,7 @@ vault_private_key = ""
 tunnel_private_key = ""
 
 [connectors.supported]
-wallets = ["klarna",
-    "mifinity", "braintree", "applepay", "adyen"]
+wallets = ["klarna", "mifinity", "braintree", "applepay", "adyen"]
 rewards = ["cashtocode", "zen"]
 cards = [
     "aci",
@@ -559,7 +558,7 @@ redis_lock_expiry_seconds = 180             # 3 * 60 seconds
 delay_between_retries_in_milliseconds = 500
 
 [kv_config]
-ttl = 900 # 15 * 60 seconds
+ttl = 900         # 15 * 60 seconds
 soft_kill = false
 
 [frm]
@@ -579,6 +578,7 @@ outgoing_webhook_logs_topic = "hyperswitch-outgoing-webhook-events"
 dispute_analytics_topic = "hyperswitch-dispute-events"
 audit_events_topic = "hyperswitch-audit-events"
 payout_analytics_topic = "hyperswitch-payout-events"
+consolidated_events_topic = "hyperswitch-consolidated-events"
 
 [analytics]
 source = "sqlx"
diff --git a/config/docker_compose.toml b/config/docker_compose.toml
index 3dac84e21d8..b94b5c8afbb 100644
--- a/config/docker_compose.toml
+++ b/config/docker_compose.toml
@@ -180,8 +180,7 @@ zsl.base_url = "https://api.sitoffalb.net/"
 apple_pay = { country = "AU,CN,HK,JP,MO,MY,NZ,SG,TW,AM,AT,AZ,BY,BE,BG,HR,CY,CZ,DK,EE,FO,FI,FR,GE,DE,GR,GL,GG,HU,IS,IE,IM,IT,KZ,JE,LV,LI,LT,LU,MT,MD,MC,ME,NL,NO,PL,PT,RO,SM,RS,SK,SI,ES,SE,CH,UA,GB,AR,CO,CR,BR,MX,PE,BH,IL,JO,KW,PS,QA,SA,AE,CA,UM,US,KR,VN,MA,ZA,VA,CL,SV,GT,HN,PA", currency = "AED,AUD,CHF,CAD,EUR,GBP,HKD,SGD,USD" }
 
 [connectors.supported]
-wallets = ["klarna",
-    "mifinity", "braintree", "applepay"]
+wallets = ["klarna", "mifinity", "braintree", "applepay"]
 rewards = ["cashtocode", "zen"]
 cards = [
     "aci",
@@ -239,7 +238,7 @@ cards = [
     "worldline",
     "worldpay",
     "zen",
-    "zsl"
+    "zsl",
 ]
 
 [delayed_session_response]
@@ -269,7 +268,7 @@ stax = { long_lived_token = true, payment_method = "card,bank_debit" }
 square = { long_lived_token = false, payment_method = "card" }
 braintree = { long_lived_token = false, payment_method = "card" }
 gocardless = { long_lived_token = true, payment_method = "bank_debit" }
-billwerk = {long_lived_token = false, payment_method = "card"}
+billwerk = { long_lived_token = false, payment_method = "card" }
 
 [temp_locker_enable_config]
 stripe = { payment_method = "bank_transfer" }
@@ -433,6 +432,7 @@ outgoing_webhook_logs_topic = "hyperswitch-outgoing-webhook-events"
 dispute_analytics_topic = "hyperswitch-dispute-events"
 audit_events_topic = "hyperswitch-audit-events"
 payout_analytics_topic = "hyperswitch-payout-events"
+consolidated_events_topic = "hyperswitch-consolidated-events"
 
 [analytics]
 source = "sqlx"
@@ -454,7 +454,7 @@ connection_timeout = 10
 queue_strategy = "Fifo"
 
 [kv_config]
-ttl = 900 # 15 * 60 seconds
+ttl = 900         # 15 * 60 seconds
 soft_kill = false
 
 [frm]
diff --git a/crates/router/src/events.rs b/crates/router/src/events.rs
index 4bca5824835..e1ecd09804c 100644
--- a/crates/router/src/events.rs
+++ b/crates/router/src/events.rs
@@ -30,6 +30,7 @@ pub enum EventType {
     AuditEvent,
     #[cfg(feature = "payouts")]
     Payout,
+    Consolidated,
 }
 
 #[derive(Debug, Default, Deserialize, Clone)]
diff --git a/crates/router/src/services/kafka.rs b/crates/router/src/services/kafka.rs
index 6f2aa9fcd10..3523ab9261f 100644
--- a/crates/router/src/services/kafka.rs
+++ b/crates/router/src/services/kafka.rs
@@ -12,9 +12,13 @@ use rdkafka::{
 pub mod payout;
 use crate::events::EventType;
 mod dispute;
+mod dispute_event;
 mod payment_attempt;
+mod payment_attempt_event;
 mod payment_intent;
+mod payment_intent_event;
 mod refund;
+mod refund_event;
 use diesel_models::refund::Refund;
 use hyperswitch_domain_models::payments::{payment_attempt::PaymentAttempt, PaymentIntent};
 use serde::Serialize;
@@ -23,8 +27,10 @@ use time::{OffsetDateTime, PrimitiveDateTime};
 #[cfg(feature = "payouts")]
 use self::payout::KafkaPayout;
 use self::{
-    dispute::KafkaDispute, payment_attempt::KafkaPaymentAttempt,
-    payment_intent::KafkaPaymentIntent, refund::KafkaRefund,
+    dispute::KafkaDispute, dispute_event::KafkaDisputeEvent, payment_attempt::KafkaPaymentAttempt,
+    payment_attempt_event::KafkaPaymentAttemptEvent, payment_intent::KafkaPaymentIntent,
+    payment_intent_event::KafkaPaymentIntentEvent, refund::KafkaRefund,
+    refund_event::KafkaRefundEvent,
 };
 use crate::types::storage::Dispute;
 
@@ -89,6 +95,42 @@ impl<'a, T: KafkaMessage> KafkaMessage for KafkaEvent<'a, T> {
     }
 }
 
+#[derive(serde::Serialize, Debug)]
+struct KafkaConsolidatedLog<'a, T: KafkaMessage> {
+    #[serde(flatten)]
+    event: &'a T,
+    tenant_id: TenantID,
+}
+
+#[derive(serde::Serialize, Debug)]
+struct KafkaConsolidatedEvent<'a, T: KafkaMessage> {
+    log: KafkaConsolidatedLog<'a, T>,
+    log_type: EventType,
+}
+
+impl<'a, T: KafkaMessage> KafkaConsolidatedEvent<'a, T> {
+    fn new(event: &'a T, tenant_id: TenantID) -> Self {
+        Self {
+            log: KafkaConsolidatedLog { event, tenant_id },
+            log_type: event.event_type(),
+        }
+    }
+}
+
+impl<'a, T: KafkaMessage> KafkaMessage for KafkaConsolidatedEvent<'a, T> {
+    fn key(&self) -> String {
+        self.log.event.key()
+    }
+
+    fn event_type(&self) -> EventType {
+        EventType::Consolidated
+    }
+
+    fn creation_timestamp(&self) -> Option<i64> {
+        self.log.event.creation_timestamp()
+    }
+}
+
 #[derive(Debug, serde::Deserialize, Clone, Default)]
 #[serde(default)]
 pub struct KafkaSettings {
@@ -103,6 +145,7 @@ pub struct KafkaSettings {
     audit_events_topic: String,
     #[cfg(feature = "payouts")]
     payout_analytics_topic: String,
+    consolidated_events_topic: String,
 }
 
 impl KafkaSettings {
@@ -175,6 +218,12 @@ impl KafkaSettings {
             ))
         })?;
 
+        common_utils::fp_utils::when(self.consolidated_events_topic.is_default_or_empty(), || {
+            Err(ApplicationError::InvalidConfigurationValueError(
+                "Consolidated Events topic must not be empty".into(),
+            ))
+        })?;
+
         Ok(())
     }
 }
@@ -192,6 +241,7 @@ pub struct KafkaProducer {
     audit_events_topic: String,
     #[cfg(feature = "payouts")]
     payout_analytics_topic: String,
+    consolidated_events_topic: String,
 }
 
 struct RdKafkaProducer(ThreadedProducer<DefaultProducerContext>);
@@ -233,23 +283,13 @@ impl KafkaProducer {
             audit_events_topic: conf.audit_events_topic.clone(),
             #[cfg(feature = "payouts")]
             payout_analytics_topic: conf.payout_analytics_topic.clone(),
+            consolidated_events_topic: conf.consolidated_events_topic.clone(),
         })
     }
 
     pub fn log_event<T: KafkaMessage>(&self, event: &T) -> MQResult<()> {
         router_env::logger::debug!("Logging Kafka Event {event:?}");
-        let topic = match event.event_type() {
-            EventType::PaymentIntent => &self.intent_analytics_topic,
-            EventType::PaymentAttempt => &self.attempt_analytics_topic,
-            EventType::Refund => &self.refund_analytics_topic,
-            EventType::ApiLogs => &self.api_logs_topic,
-            EventType::ConnectorApiLogs => &self.connector_logs_topic,
-            EventType::OutgoingWebhookLogs => &self.outgoing_webhook_logs_topic,
-            EventType::Dispute => &self.dispute_analytics_topic,
-            EventType::AuditEvent => &self.audit_events_topic,
-            #[cfg(feature = "payouts")]
-            EventType::Payout => &self.payout_analytics_topic,
-        };
+        let topic = self.get_topic(event.event_type());
         self.producer
             .0
             .send(
@@ -281,11 +321,18 @@ impl KafkaProducer {
                 format!("Failed to add negative attempt event {negative_event:?}")
             })?;
         };
+
         self.log_event(&KafkaEvent::new(
             &KafkaPaymentAttempt::from_storage(attempt),
             tenant_id.clone(),
         ))
-        .attach_printable_lazy(|| format!("Failed to add positive attempt event {attempt:?}"))
+        .attach_printable_lazy(|| format!("Failed to add positive attempt event {attempt:?}"))?;
+
+        self.log_event(&KafkaConsolidatedEvent::new(
+            &KafkaPaymentAttemptEvent::from_storage(attempt),
+            tenant_id.clone(),
+        ))
+        .attach_printable_lazy(|| format!("Failed to add consolidated attempt event {attempt:?}"))
     }
 
     pub async fn log_payment_attempt_delete(
@@ -317,11 +364,18 @@ impl KafkaProducer {
                 format!("Failed to add negative intent event {negative_event:?}")
             })?;
         };
+
         self.log_event(&KafkaEvent::new(
             &KafkaPaymentIntent::from_storage(intent),
             tenant_id.clone(),
         ))
-        .attach_printable_lazy(|| format!("Failed to add positive intent event {intent:?}"))
+        .attach_printable_lazy(|| format!("Failed to add positive intent event {intent:?}"))?;
+
+        self.log_event(&KafkaConsolidatedEvent::new(
+            &KafkaPaymentIntentEvent::from_storage(intent),
+            tenant_id.clone(),
+        ))
+        .attach_printable_lazy(|| format!("Failed to add consolidated intent event {intent:?}"))
     }
 
     pub async fn log_payment_intent_delete(
@@ -353,11 +407,18 @@ impl KafkaProducer {
                 format!("Failed to add negative refund event {negative_event:?}")
             })?;
         };
+
         self.log_event(&KafkaEvent::new(
             &KafkaRefund::from_storage(refund),
             tenant_id.clone(),
         ))
-        .attach_printable_lazy(|| format!("Failed to add positive refund event {refund:?}"))
+        .attach_printable_lazy(|| format!("Failed to add positive refund event {refund:?}"))?;
+
+        self.log_event(&KafkaConsolidatedEvent::new(
+            &KafkaRefundEvent::from_storage(refund),
+            tenant_id.clone(),
+        ))
+        .attach_printable_lazy(|| format!("Failed to add consolidated refund event {refund:?}"))
     }
 
     pub async fn log_refund_delete(
@@ -389,11 +450,18 @@ impl KafkaProducer {
                 format!("Failed to add negative dispute event {negative_event:?}")
             })?;
         };
+
         self.log_event(&KafkaEvent::new(
             &KafkaDispute::from_storage(dispute),
             tenant_id.clone(),
         ))
-        .attach_printable_lazy(|| format!("Failed to add positive dispute event {dispute:?}"))
+        .attach_printable_lazy(|| format!("Failed to add positive dispute event {dispute:?}"))?;
+
+        self.log_event(&KafkaConsolidatedEvent::new(
+            &KafkaDisputeEvent::from_storage(dispute),
+            tenant_id.clone(),
+        ))
+        .attach_printable_lazy(|| format!("Failed to add consolidated dispute event {dispute:?}"))
     }
 
     #[cfg(feature = "payouts")]
@@ -437,6 +505,7 @@ impl KafkaProducer {
             EventType::AuditEvent => &self.audit_events_topic,
             #[cfg(feature = "payouts")]
             EventType::Payout => &self.payout_analytics_topic,
+            EventType::Consolidated => &self.consolidated_events_topic,
         }
     }
 }
diff --git a/crates/router/src/services/kafka/dispute_event.rs b/crates/router/src/services/kafka/dispute_event.rs
new file mode 100644
index 00000000000..71e0a11e04d
--- /dev/null
+++ b/crates/router/src/services/kafka/dispute_event.rs
@@ -0,0 +1,77 @@
+use diesel_models::enums as storage_enums;
+use masking::Secret;
+use time::OffsetDateTime;
+
+use crate::types::storage::dispute::Dispute;
+
+#[serde_with::skip_serializing_none]
+#[derive(serde::Serialize, Debug)]
+pub struct KafkaDisputeEvent<'a> {
+    pub dispute_id: &'a String,
+    pub dispute_amount: i64,
+    pub currency: &'a String,
+    pub dispute_stage: &'a storage_enums::DisputeStage,
+    pub dispute_status: &'a storage_enums::DisputeStatus,
+    pub payment_id: &'a String,
+    pub attempt_id: &'a String,
+    pub merchant_id: &'a String,
+    pub connector_status: &'a String,
+    pub connector_dispute_id: &'a String,
+    pub connector_reason: Option<&'a String>,
+    pub connector_reason_code: Option<&'a String>,
+    #[serde(default, with = "time::serde::timestamp::milliseconds::option")]
+    pub challenge_required_by: Option<OffsetDateTime>,
+    #[serde(default, with = "time::serde::timestamp::milliseconds::option")]
+    pub connector_created_at: Option<OffsetDateTime>,
+    #[serde(default, with = "time::serde::timestamp::milliseconds::option")]
+    pub connector_updated_at: Option<OffsetDateTime>,
+    #[serde(default, with = "time::serde::timestamp::milliseconds")]
+    pub created_at: OffsetDateTime,
+    #[serde(default, with = "time::serde::timestamp::milliseconds")]
+    pub modified_at: OffsetDateTime,
+    pub connector: &'a String,
+    pub evidence: &'a Secret<serde_json::Value>,
+    pub profile_id: Option<&'a String>,
+    pub merchant_connector_id: Option<&'a String>,
+}
+
+impl<'a> KafkaDisputeEvent<'a> {
+    pub fn from_storage(dispute: &'a Dispute) -> Self {
+        Self {
+            dispute_id: &dispute.dispute_id,
+            dispute_amount: dispute.amount.parse::<i64>().unwrap_or_default(),
+            currency: &dispute.currency,
+            dispute_stage: &dispute.dispute_stage,
+            dispute_status: &dispute.dispute_status,
+            payment_id: &dispute.payment_id,
+            attempt_id: &dispute.attempt_id,
+            merchant_id: &dispute.merchant_id,
+            connector_status: &dispute.connector_status,
+            connector_dispute_id: &dispute.connector_dispute_id,
+            connector_reason: dispute.connector_reason.as_ref(),
+            connector_reason_code: dispute.connector_reason_code.as_ref(),
+            challenge_required_by: dispute.challenge_required_by.map(|i| i.assume_utc()),
+            connector_created_at: dispute.connector_created_at.map(|i| i.assume_utc()),
+            connector_updated_at: dispute.connector_updated_at.map(|i| i.assume_utc()),
+            created_at: dispute.created_at.assume_utc(),
+            modified_at: dispute.modified_at.assume_utc(),
+            connector: &dispute.connector,
+            evidence: &dispute.evidence,
+            profile_id: dispute.profile_id.as_ref(),
+            merchant_connector_id: dispute.merchant_connector_id.as_ref(),
+        }
+    }
+}
+
+impl<'a> super::KafkaMessage for KafkaDisputeEvent<'a> {
+    fn key(&self) -> String {
+        format!(
+            "{}_{}_{}",
+            self.merchant_id, self.payment_id, self.dispute_id
+        )
+    }
+
+    fn event_type(&self) -> crate::events::EventType {
+        crate::events::EventType::Dispute
+    }
+}
diff --git a/crates/router/src/services/kafka/payment_attempt_event.rs b/crates/router/src/services/kafka/payment_attempt_event.rs
new file mode 100644
index 00000000000..bb4d69eda27
--- /dev/null
+++ b/crates/router/src/services/kafka/payment_attempt_event.rs
@@ -0,0 +1,119 @@
+// use diesel_models::enums::MandateDetails;
+use common_utils::types::MinorUnit;
+use diesel_models::enums as storage_enums;
+use hyperswitch_domain_models::{
+    mandates::MandateDetails, payments::payment_attempt::PaymentAttempt,
+};
+use time::OffsetDateTime;
+
+#[serde_with::skip_serializing_none]
+#[derive(serde::Serialize, Debug)]
+pub struct KafkaPaymentAttemptEvent<'a> {
+    pub payment_id: &'a String,
+    pub merchant_id: &'a String,
+    pub attempt_id: &'a String,
+    pub status: storage_enums::AttemptStatus,
+    pub amount: MinorUnit,
+    pub currency: Option<storage_enums::Currency>,
+    pub save_to_locker: Option<bool>,
+    pub connector: Option<&'a String>,
+    pub error_message: Option<&'a String>,
+    pub offer_amount: Option<MinorUnit>,
+    pub surcharge_amount: Option<MinorUnit>,
+    pub tax_amount: Option<MinorUnit>,
+    pub payment_method_id: Option<&'a String>,
+    pub payment_method: Option<storage_enums::PaymentMethod>,
+    pub connector_transaction_id: Option<&'a String>,
+    pub capture_method: Option<storage_enums::CaptureMethod>,
+    #[serde(default, with = "time::serde::timestamp::milliseconds::option")]
+    pub capture_on: Option<OffsetDateTime>,
+    pub confirm: bool,
+    pub authentication_type: Option<storage_enums::AuthenticationType>,
+    #[serde(with = "time::serde::timestamp::milliseconds")]
+    pub created_at: OffsetDateTime,
+    #[serde(with = "time::serde::timestamp::milliseconds")]
+    pub modified_at: OffsetDateTime,
+    #[serde(default, with = "time::serde::timestamp::milliseconds::option")]
+    pub last_synced: Option<OffsetDateTime>,
+    pub cancellation_reason: Option<&'a String>,
+    pub amount_to_capture: Option<MinorUnit>,
+    pub mandate_id: Option<&'a String>,
+    pub browser_info: Option<String>,
+    pub error_code: Option<&'a String>,
+    pub connector_metadata: Option<String>,
+    // TODO: These types should implement copy ideally
+    pub payment_experience: Option<&'a storage_enums::PaymentExperience>,
+    pub payment_method_type: Option<&'a storage_enums::PaymentMethodType>,
+    pub payment_method_data: Option<String>,
+    pub error_reason: Option<&'a String>,
+    pub multiple_capture_count: Option<i16>,
+    pub amount_capturable: MinorUnit,
+    pub merchant_connector_id: Option<&'a String>,
+    pub net_amount: MinorUnit,
+    pub unified_code: Option<&'a String>,
+    pub unified_message: Option<&'a String>,
+    pub mandate_data: Option<&'a MandateDetails>,
+    pub client_source: Option<&'a String>,
+    pub client_version: Option<&'a String>,
+}
+
+impl<'a> KafkaPaymentAttemptEvent<'a> {
+    pub fn from_storage(attempt: &'a PaymentAttempt) -> Self {
+        Self {
+            payment_id: &attempt.payment_id,
+            merchant_id: &attempt.merchant_id,
+            attempt_id: &attempt.attempt_id,
+            status: attempt.status,
+            amount: attempt.amount,
+            currency: attempt.currency,
+            save_to_locker: attempt.save_to_locker,
+            connector: attempt.connector.as_ref(),
+            error_message: attempt.error_message.as_ref(),
+            offer_amount: attempt.offer_amount,
+            surcharge_amount: attempt.surcharge_amount,
+            tax_amount: attempt.tax_amount,
+            payment_method_id: attempt.payment_method_id.as_ref(),
+            payment_method: attempt.payment_method,
+            connector_transaction_id: attempt.connector_transaction_id.as_ref(),
+            capture_method: attempt.capture_method,
+            capture_on: attempt.capture_on.map(|i| i.assume_utc()),
+            confirm: attempt.confirm,
+            authentication_type: attempt.authentication_type,
+            created_at: attempt.created_at.assume_utc(),
+            modified_at: attempt.modified_at.assume_utc(),
+            last_synced: attempt.last_synced.map(|i| i.assume_utc()),
+            cancellation_reason: attempt.cancellation_reason.as_ref(),
+            amount_to_capture: attempt.amount_to_capture,
+            mandate_id: attempt.mandate_id.as_ref(),
+            browser_info: attempt.browser_info.as_ref().map(|v| v.to_string()),
+            error_code: attempt.error_code.as_ref(),
+            connector_metadata: attempt.connector_metadata.as_ref().map(|v| v.to_string()),
+            payment_experience: attempt.payment_experience.as_ref(),
+            payment_method_type: attempt.payment_method_type.as_ref(),
+            payment_method_data: attempt.payment_method_data.as_ref().map(|v| v.to_string()),
+            error_reason: attempt.error_reason.as_ref(),
+            multiple_capture_count: attempt.multiple_capture_count,
+            amount_capturable: attempt.amount_capturable,
+            merchant_connector_id: attempt.merchant_connector_id.as_ref(),
+            net_amount: attempt.net_amount,
+            unified_code: attempt.unified_code.as_ref(),
+            unified_message: attempt.unified_message.as_ref(),
+            mandate_data: attempt.mandate_data.as_ref(),
+            client_source: attempt.client_source.as_ref(),
+            client_version: attempt.client_version.as_ref(),
+        }
+    }
+}
+
+impl<'a> super::KafkaMessage for KafkaPaymentAttemptEvent<'a> {
+    fn key(&self) -> String {
+        format!(
+            "{}_{}_{}",
+            self.merchant_id, self.payment_id, self.attempt_id
+        )
+    }
+
+    fn event_type(&self) -> crate::events::EventType {
+        crate::events::EventType::PaymentAttempt
+    }
+}
diff --git a/crates/router/src/services/kafka/payment_intent_event.rs b/crates/router/src/services/kafka/payment_intent_event.rs
new file mode 100644
index 00000000000..a3fbd9ddc45
--- /dev/null
+++ b/crates/router/src/services/kafka/payment_intent_event.rs
@@ -0,0 +1,75 @@
+use common_utils::{id_type, types::MinorUnit};
+use diesel_models::enums as storage_enums;
+use hyperswitch_domain_models::payments::PaymentIntent;
+use time::OffsetDateTime;
+
+#[serde_with::skip_serializing_none]
+#[derive(serde::Serialize, Debug)]
+pub struct KafkaPaymentIntentEvent<'a> {
+    pub payment_id: &'a String,
+    pub merchant_id: &'a String,
+    pub status: storage_enums::IntentStatus,
+    pub amount: MinorUnit,
+    pub currency: Option<storage_enums::Currency>,
+    pub amount_captured: Option<MinorUnit>,
+    pub customer_id: Option<&'a id_type::CustomerId>,
+    pub description: Option<&'a String>,
+    pub return_url: Option<&'a String>,
+    pub connector_id: Option<&'a String>,
+    pub statement_descriptor_name: Option<&'a String>,
+    pub statement_descriptor_suffix: Option<&'a String>,
+    #[serde(with = "time::serde::timestamp::milliseconds")]
+    pub created_at: OffsetDateTime,
+    #[serde(with = "time::serde::timestamp::milliseconds")]
+    pub modified_at: OffsetDateTime,
+    #[serde(default, with = "time::serde::timestamp::milliseconds::option")]
+    pub last_synced: Option<OffsetDateTime>,
+    pub setup_future_usage: Option<storage_enums::FutureUsage>,
+    pub off_session: Option<bool>,
+    pub client_secret: Option<&'a String>,
+    pub active_attempt_id: String,
+    pub business_country: Option<storage_enums::CountryAlpha2>,
+    pub business_label: Option<&'a String>,
+    pub attempt_count: i16,
+    pub payment_confirm_source: Option<storage_enums::PaymentSource>,
+}
+
+impl<'a> KafkaPaymentIntentEvent<'a> {
+    pub fn from_storage(intent: &'a PaymentIntent) -> Self {
+        Self {
+            payment_id: &intent.payment_id,
+            merchant_id: &intent.merchant_id,
+            status: intent.status,
+            amount: intent.amount,
+            currency: intent.currency,
+            amount_captured: intent.amount_captured,
+            customer_id: intent.customer_id.as_ref(),
+            description: intent.description.as_ref(),
+            return_url: intent.return_url.as_ref(),
+            connector_id: intent.connector_id.as_ref(),
+            statement_descriptor_name: intent.statement_descriptor_name.as_ref(),
+            statement_descriptor_suffix: intent.statement_descriptor_suffix.as_ref(),
+            created_at: intent.created_at.assume_utc(),
+            modified_at: intent.modified_at.assume_utc(),
+            last_synced: intent.last_synced.map(|i| i.assume_utc()),
+            setup_future_usage: intent.setup_future_usage,
+            off_session: intent.off_session,
+            client_secret: intent.client_secret.as_ref(),
+            active_attempt_id: intent.active_attempt.get_id(),
+            business_country: intent.business_country,
+            business_label: intent.business_label.as_ref(),
+            attempt_count: intent.attempt_count,
+            payment_confirm_source: intent.payment_confirm_source,
+        }
+    }
+}
+
+impl<'a> super::KafkaMessage for KafkaPaymentIntentEvent<'a> {
+    fn key(&self) -> String {
+        format!("{}_{}", self.merchant_id, self.payment_id)
+    }
+
+    fn event_type(&self) -> crate::events::EventType {
+        crate::events::EventType::PaymentIntent
+    }
+}
diff --git a/crates/router/src/services/kafka/refund_event.rs b/crates/router/src/services/kafka/refund_event.rs
new file mode 100644
index 00000000000..6aa80b243c1
--- /dev/null
+++ b/crates/router/src/services/kafka/refund_event.rs
@@ -0,0 +1,74 @@
+use common_utils::types::MinorUnit;
+use diesel_models::{enums as storage_enums, refund::Refund};
+use time::OffsetDateTime;
+
+#[serde_with::skip_serializing_none]
+#[derive(serde::Serialize, Debug)]
+pub struct KafkaRefundEvent<'a> {
+    pub internal_reference_id: &'a String,
+    pub refund_id: &'a String, //merchant_reference id
+    pub payment_id: &'a String,
+    pub merchant_id: &'a String,
+    pub connector_transaction_id: &'a String,
+    pub connector: &'a String,
+    pub connector_refund_id: Option<&'a String>,
+    pub external_reference_id: Option<&'a String>,
+    pub refund_type: &'a storage_enums::RefundType,
+    pub total_amount: &'a MinorUnit,
+    pub currency: &'a storage_enums::Currency,
+    pub refund_amount: &'a MinorUnit,
+    pub refund_status: &'a storage_enums::RefundStatus,
+    pub sent_to_gateway: &'a bool,
+    pub refund_error_message: Option<&'a String>,
+    pub refund_arn: Option<&'a String>,
+    #[serde(default, with = "time::serde::timestamp::milliseconds")]
+    pub created_at: OffsetDateTime,
+    #[serde(default, with = "time::serde::timestamp::milliseconds")]
+    pub modified_at: OffsetDateTime,
+    pub description: Option<&'a String>,
+    pub attempt_id: &'a String,
+    pub refund_reason: Option<&'a String>,
+    pub refund_error_code: Option<&'a String>,
+}
+
+impl<'a> KafkaRefundEvent<'a> {
+    pub fn from_storage(refund: &'a Refund) -> Self {
+        Self {
+            internal_reference_id: &refund.internal_reference_id,
+            refund_id: &refund.refund_id,
+            payment_id: &refund.payment_id,
+            merchant_id: &refund.merchant_id,
+            connector_transaction_id: &refund.connector_transaction_id,
+            connector: &refund.connector,
+            connector_refund_id: refund.connector_refund_id.as_ref(),
+            external_reference_id: refund.external_reference_id.as_ref(),
+            refund_type: &refund.refund_type,
+            total_amount: &refund.total_amount,
+            currency: &refund.currency,
+            refund_amount: &refund.refund_amount,
+            refund_status: &refund.refund_status,
+            sent_to_gateway: &refund.sent_to_gateway,
+            refund_error_message: refund.refund_error_message.as_ref(),
+            refund_arn: refund.refund_arn.as_ref(),
+            created_at: refund.created_at.assume_utc(),
+            modified_at: refund.updated_at.assume_utc(),
+            description: refund.description.as_ref(),
+            attempt_id: &refund.attempt_id,
+            refund_reason: refund.refund_reason.as_ref(),
+            refund_error_code: refund.refund_error_code.as_ref(),
+        }
+    }
+}
+
+impl<'a> super::KafkaMessage for KafkaRefundEvent<'a> {
+    fn key(&self) -> String {
+        format!(
+            "{}_{}_{}_{}",
+            self.merchant_id, self.payment_id, self.attempt_id, self.refund_id
+        )
+    }
+
+    fn event_type(&self) -> crate::events::EventType {
+        crate::events::EventType::Refund
+    }
+}