0.5.3

kb_lib/src/db/dtos/onchain_observation.rs

@@ -0,0 +1,104 @@
+// file: kb_lib/src/db/dtos/onchain_observation.rs
+
+//! On-chain observation DTO.
+
+/// Application-facing on-chain observation DTO.
+#[derive(Debug, Clone, serde::Serialize, serde::Deserialize)]
+pub struct KbOnchainObservationDto {
+    /// Optional numeric primary key.
+    pub id: std::option::Option<i64>,
+    /// Observation kind.
+    pub observation_kind: std::string::String,
+    /// Observation source family.
+    pub source_kind: crate::KbObservationSourceKind,
+    /// Optional source endpoint logical name.
+    pub endpoint_name: std::option::Option<std::string::String>,
+    /// Logical object key, for example a mint, signature or pool address.
+    pub object_key: std::string::String,
+    /// Optional slot number.
+    pub slot: std::option::Option<u64>,
+    /// Raw JSON payload.
+    pub payload: serde_json::Value,
+    /// Observation timestamp.
+    pub observed_at: chrono::DateTime<chrono::Utc>,
+}
+
+impl KbOnchainObservationDto {
+    /// Creates a new on-chain observation DTO with the current timestamp.
+    pub fn new(
+        observation_kind: std::string::String,
+        source_kind: crate::KbObservationSourceKind,
+        endpoint_name: std::option::Option<std::string::String>,
+        object_key: std::string::String,
+        slot: std::option::Option<u64>,
+        payload: serde_json::Value,
+    ) -> Self {
+        Self {
+            id: None,
+            observation_kind,
+            source_kind,
+            endpoint_name,
+            object_key,
+            slot,
+            payload,
+            observed_at: chrono::Utc::now(),
+        }
+    }
+}
+
+impl TryFrom<crate::KbOnchainObservationEntity> for KbOnchainObservationDto {
+    type Error = crate::KbError;
+
+    fn try_from(entity: crate::KbOnchainObservationEntity) -> Result<Self, Self::Error> {
+        let source_kind_result = crate::KbObservationSourceKind::from_i16(entity.source_kind);
+        let source_kind = match source_kind_result {
+            Ok(source_kind) => source_kind,
+            Err(error) => return Err(error),
+        };
+        let observed_at_result = chrono::DateTime::parse_from_rfc3339(&entity.observed_at);
+        let observed_at = match observed_at_result {
+            Ok(observed_at) => observed_at.with_timezone(&chrono::Utc),
+            Err(error) => {
+                return Err(crate::KbError::Db(format!(
+                    "cannot parse on-chain observation observed_at '{}': {}",
+                    entity.observed_at, error
+                )));
+            }
+        };
+        let payload_result = serde_json::from_str::<serde_json::Value>(&entity.payload_json);
+        let payload = match payload_result {
+            Ok(payload) => payload,
+            Err(error) => {
+                return Err(crate::KbError::Db(format!(
+                    "cannot parse on-chain observation payload_json '{}': {}",
+                    entity.payload_json, error
+                )));
+            }
+        };
+        let slot = match entity.slot {
+            Some(slot) => {
+                let slot_result = u64::try_from(slot);
+                match slot_result {
+                    Ok(slot) => Some(slot),
+                    Err(error) => {
+                        return Err(crate::KbError::Db(format!(
+                            "cannot convert on-chain observation slot '{}' to u64: {}",
+                            slot, error
+                        )));
+                    }
+                }
+            }
+            None => None,
+        };
+        Ok(Self {
+            id: Some(entity.id),
+            observation_kind: entity.observation_kind,
+            source_kind,
+            endpoint_name: entity.endpoint_name,
+            object_key: entity.object_key,
+            slot,
+            payload,
+            observed_at,
+        })
+    }
+}