v0.3.16-pre.002

crates/ksp-store-api/src/lib.rs

@@ -1,10 +1,8 @@
 // file: crates/ksp-store-api/src/lib.rs
-// version: 7
-
+// version: 8
 #![warn(missing_docs)]
 #![deny(unreachable_pub)]
 #![forbid(unsafe_code)]
-
 //! Backend-agnostic persistence contracts for KSP Store implementations.
 //!
 //! `ksp-store-api` owns persistent models plus the contracts that operate on
@@ -15,11 +13,9 @@
 //! Models and capabilities deliberately have separate private module homes.
 //! Backend implementations, SQL, migrations, Config, Transport and runtime
 //! dispatch remain outside this crate.
-
 mod capability;
 mod error;
 mod model;
-
 /// Boxed async operation returned by object-safe Store capability contracts.
 pub use self::capability::StoreApiFuture;
 /// Read capability for random-access RAW account-observation inspection.
@@ -94,6 +90,8 @@ pub use self::model::raw_outcome::RawAcquisitionWriteOutcome;
 pub use self::model::raw_outcome::RawEntityWriteOutcome;
 /// Outcome for one deterministic acquisition observation write.
 pub use self::model::raw_outcome::RawObservationWriteOutcome;
+/// Durable Store outcome for one variant-aware RAW transaction acquisition.
+pub use self::model::raw_outcome::RawTransactionVariantWriteOutcome;
 /// Maximum opaque query cursor length admitted by the Store API.
 pub use self::model::raw_pagination::MAX_RAW_PAGE_CURSOR_BYTES;
 /// Backend-independent list query for complete canonical RAW account states.
@@ -154,10 +152,24 @@ pub use self::model::raw_retention::RawTransactionRetentionTransition;
 pub use self::model::raw_retention::RawTransactionTombstone;
 /// Canonical source-independent N1 RAW transaction persisted by Store backends.
 pub use self::model::raw_transaction::RawTransaction;
+/// Durable lifecycle status of one RAW transaction conflict case.
+pub use self::model::raw_transaction::RawTransactionConflictStatus;
 /// Persistable acquisition observation linked to one canonical RAW transaction.
 pub use self::model::raw_transaction::RawTransactionObservation;
 /// Durable backend-independent identity of one canonical RAW transaction.
 pub use self::model::raw_transaction::RawTransactionReference;
+/// Validated backend-neutral result of comparing canonical and incoming RAW transaction variants.
+pub use self::model::raw_transaction::RawTransactionVariantComparison;
+/// Stable non-zero Store identity of one persisted RAW transaction variant.
+pub use self::model::raw_transaction::RawTransactionVariantId;
+/// Origin of one persisted RAW transaction variant.
+pub use self::model::raw_transaction::RawTransactionVariantOrigin;
+/// Durable reference to one persisted RAW transaction variant.
+pub use self::model::raw_transaction::RawTransactionVariantReference;
+/// Backend-neutral quality relation between canonical and incoming RAW transaction variants.
+pub use self::model::raw_transaction::RawTransactionVariantRelation;
+/// Stable backend-neutral reason explaining one RAW transaction variant relation.
+pub use self::model::raw_transaction::RawTransactionVariantRelationReason;
 /// Common KSP error type used by Store-facing contracts.
 pub use ksp_core_lib::Error;
 /// Stable structured code identifying a KSP error category and condition.

crates/ksp-store-api/src/model/raw_outcome.rs

@@ -1,6 +1,5 @@
 // file: crates/ksp-store-api/src/model/raw_outcome.rs
-// version: 1
-
+// version: 2
 /// Outcome for one canonical RAW entity in an idempotent persistence operation.
 #[non_exhaustive]
 #[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
@@ -14,7 +13,6 @@ pub enum RawEntityWriteOutcome {
     /// Normal persistence skipped a durable purged tombstone.
     SkippedPurged,
 }
-
 /// Outcome for one deterministic acquisition observation write.
 #[non_exhaustive]
 #[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
@@ -26,14 +24,12 @@ pub enum RawObservationWriteOutcome {
     /// No observation was recorded because the associated RAW entity was intentionally skipped.
     NotRecorded,
 }
-
 /// Combined outcome of one atomic canonical RAW entity plus observation acquisition.
 #[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
 pub struct RawAcquisitionWriteOutcome {
     entity: crate::RawEntityWriteOutcome,
     observation: crate::RawObservationWriteOutcome,
 }
-
 impl RawAcquisitionWriteOutcome {
     /// Creates one backend-independent atomic acquisition outcome.
     #[must_use]
@@ -46,10 +42,33 @@ impl RawAcquisitionWriteOutcome {
     pub const fn entity(&self) -> crate::RawEntityWriteOutcome {
         return self.entity;
     }
-
     /// Returns the acquisition observation write outcome.
     #[must_use]
     pub const fn observation(&self) -> crate::RawObservationWriteOutcome {
         return self.observation;
     }
 }
+
+/// Durable Store outcome for one RAW transaction acquisition after variant-aware convergence.
+///
+/// Every variant represents a successful Store-domain result. In particular,
+/// [`Self::QuarantinedConflict`] is durable success and must not be reinterpreted as a
+/// transport failure or terminal persistence error by callers.
+#[non_exhaustive]
+#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
+pub enum RawTransactionVariantWriteOutcome {
+    /// First durable variant became the initial canonical transaction.
+    InsertedCanonical,
+    /// Incoming content exactly matched an already durable variant/canonical representation.
+    ObservedExact,
+    /// Incoming content was durably observed while the current canonical variant remained strictly more complete.
+    ObservedCompatibleLessComplete,
+    /// Incoming content was durably persisted and atomically promoted because it was strictly more complete.
+    PromotedCompatibleMoreComplete,
+    /// Divergent or incomparable content was durably preserved without changing the current canonical variant.
+    QuarantinedConflict,
+    /// Explicit force-rehydration restored a previously purged logical transaction into variant-aware storage.
+    Rehydrated,
+    /// Normal acquisition respected an existing purged tombstone and performed no rehydration.
+    SkippedPurged,
+}

crates/ksp-store-api/src/model/raw_transaction.rs

@@ -1,5 +1,5 @@
 // file: crates/ksp-store-api/src/model/raw_transaction.rs
-// version: 1
+// version: 2
 
 /// Durable backend-independent identity of one canonical RAW transaction.
 #[derive(Clone, Debug, Eq, Hash, PartialEq)]
@@ -7,7 +7,6 @@ pub struct RawTransactionReference {
     network: crate::RawNetworkId,
     signature: crate::RawTransactionSignature,
 }
-
 impl RawTransactionReference {
     /// Creates one durable transaction identity from network and canonical Solana signature.
     #[must_use]
@@ -20,7 +19,6 @@ impl RawTransactionReference {
     pub fn network(&self) -> &crate::RawNetworkId {
         return &self.network;
     }
-
     /// Returns the canonical transaction signature.
     #[must_use]
     pub const fn signature(&self) -> crate::RawTransactionSignature {
@@ -28,6 +26,195 @@ impl RawTransactionReference {
     }
 }
 
+/// Stable non-zero Store identity of one persisted RAW transaction variant.
+///
+/// The identifier is a backend-neutral surrogate. It deliberately does not encode
+/// `content_hash`, provider identity, canonicality or any physical database key layout.
+#[derive(Clone, Copy, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
+pub struct RawTransactionVariantId(u64);
+impl RawTransactionVariantId {
+    /// Creates one non-zero stable variant identifier.
+    pub fn try_new(value: u64) -> crate::Result<Self> {
+        if value == 0 {
+            return std::result::Result::Err(raw_variant_model_error("variant_id"));
+        }
+        return std::result::Result::Ok(Self(value));
+    }
+
+    /// Returns the opaque numeric surrogate unchanged.
+    #[must_use]
+    pub const fn get(&self) -> u64 {
+        return self.0;
+    }
+}
+
+/// Durable reference to one persisted RAW transaction variant.
+#[derive(Clone, Debug, Eq, Hash, PartialEq)]
+pub struct RawTransactionVariantReference {
+    transaction: crate::RawTransactionReference,
+    variant_id: crate::RawTransactionVariantId,
+}
+impl RawTransactionVariantReference {
+    /// Creates one durable variant reference from logical transaction identity and surrogate id.
+    #[must_use]
+    pub fn new(transaction: crate::RawTransactionReference, variant_id: crate::RawTransactionVariantId) -> Self {
+        return Self { transaction, variant_id };
+    }
+
+    /// Returns the logical transaction identity owning this variant.
+    #[must_use]
+    pub fn transaction(&self) -> &crate::RawTransactionReference {
+        return &self.transaction;
+    }
+
+    /// Returns the stable surrogate variant identifier.
+    #[must_use]
+    pub const fn variant_id(&self) -> crate::RawTransactionVariantId {
+        return self.variant_id;
+    }
+}
+
+/// Origin of one persisted RAW transaction variant.
+#[non_exhaustive]
+#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
+pub enum RawTransactionVariantOrigin {
+    /// Exact canonical RAW representation received from one acquisition source.
+    Native,
+    /// Explicitly synthesized canonical RAW representation derived from preserved parent variants.
+    Synthetic,
+}
+impl RawTransactionVariantOrigin {
+    /// Returns the stable persistence code for this origin.
+    #[must_use]
+    pub const fn code(&self) -> &'static str {
+        return match self {
+            Self::Native => "native",
+            Self::Synthetic => "synthetic",
+        };
+    }
+}
+
+/// Backend-neutral quality relation between the current canonical RAW transaction and one incoming variant.
+#[non_exhaustive]
+#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
+pub enum RawTransactionVariantRelation {
+    /// Canonical transaction content is exactly equal after exact comparison.
+    Exact,
+    /// Incoming content is compatible but provably less complete than the current canonical variant.
+    CompatibleLessComplete,
+    /// Incoming content is compatible and provably more complete than the current canonical variant.
+    CompatibleMoreComplete,
+    /// A canonical transaction invariant is contradicted by the incoming variant.
+    Conflict,
+    /// No contradiction must be asserted, but no safe dominance relation is proved.
+    Incomparable,
+}
+impl RawTransactionVariantRelation {
+    /// Returns the stable persistence/diagnostic code for this relation.
+    #[must_use]
+    pub const fn code(&self) -> &'static str {
+        return match self {
+            Self::Exact => "exact",
+            Self::CompatibleLessComplete => "compatible_less_complete",
+            Self::CompatibleMoreComplete => "compatible_more_complete",
+            Self::Conflict => "conflict",
+            Self::Incomparable => "incomparable",
+        };
+    }
+}
+
+/// Stable backend-neutral reason explaining one RAW transaction variant relation.
+///
+/// These codes describe Store-domain comparison evidence only. They do not encode a
+/// provider, route, backend implementation or retry classification.
+#[non_exhaustive]
+#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
+pub enum RawTransactionVariantRelationReason {
+    /// Exact canonical transaction content equality was proved.
+    ExactCanonicalContent,
+    /// The incoming variant differs only by explicitly proved truncated `logMessages`.
+    IncomingLogMessagesTruncated,
+    /// The current canonical variant differs only by explicitly proved truncated `logMessages`.
+    CanonicalLogMessagesTruncated,
+    /// The transaction slot contradicts the current canonical transaction.
+    SlotMismatch,
+    /// The optional block timestamp contradicts the current canonical transaction.
+    BlockTimeMismatch,
+    /// Canonical RAW format identity/version differs and no safe equivalence contract applies.
+    PayloadFormatMismatch,
+    /// Canonical RAW payload content contains a proved contradiction.
+    CanonicalPayloadConflict,
+    /// Equal content digests were observed for canonical representations that are not byte-identical.
+    ContentHashCollision,
+    /// Canonical representations differ but the current comparator cannot prove equality, dominance or contradiction safely.
+    UnsupportedCanonicalDifference,
+}
+impl RawTransactionVariantRelationReason {
+    /// Returns the stable persistence/diagnostic code for this reason.
+    #[must_use]
+    pub const fn code(&self) -> &'static str {
+        return match self {
+            Self::ExactCanonicalContent => "exact_canonical_content",
+            Self::IncomingLogMessagesTruncated => "incoming_log_messages_truncated",
+            Self::CanonicalLogMessagesTruncated => "canonical_log_messages_truncated",
+            Self::SlotMismatch => "slot_mismatch",
+            Self::BlockTimeMismatch => "block_time_mismatch",
+            Self::PayloadFormatMismatch => "payload_format_mismatch",
+            Self::CanonicalPayloadConflict => "canonical_payload_conflict",
+            Self::ContentHashCollision => "content_hash_collision",
+            Self::UnsupportedCanonicalDifference => "unsupported_canonical_difference",
+        };
+    }
+}
+
+/// Validated backend-neutral result of comparing the current canonical transaction with one incoming variant.
+#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
+pub struct RawTransactionVariantComparison {
+    reason: crate::RawTransactionVariantRelationReason,
+    relation: crate::RawTransactionVariantRelation,
+}
+impl RawTransactionVariantComparison {
+    /// Creates one relation/reason pair and rejects semantically inconsistent combinations.
+    pub fn try_new(relation: crate::RawTransactionVariantRelation, reason: crate::RawTransactionVariantRelationReason) -> crate::Result<Self> {
+        if !valid_variant_relation_reason(relation, reason) {
+            return std::result::Result::Err(raw_variant_model_error("relation_reason"));
+        }
+        return std::result::Result::Ok(Self { reason, relation });
+    }
+
+    /// Returns the stable reason code explaining the comparison.
+    #[must_use]
+    pub const fn reason(&self) -> crate::RawTransactionVariantRelationReason {
+        return self.reason;
+    }
+
+    /// Returns the backend-neutral quality relation.
+    #[must_use]
+    pub const fn relation(&self) -> crate::RawTransactionVariantRelation {
+        return self.relation;
+    }
+}
+
+/// Durable lifecycle status of one RAW transaction conflict case.
+#[non_exhaustive]
+#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
+pub enum RawTransactionConflictStatus {
+    /// At least one preserved variant still requires explicit or future automatic reconciliation.
+    Open,
+    /// The conflict currently has an explicit durable resolution while history remains preserved.
+    Resolved,
+}
+impl RawTransactionConflictStatus {
+    /// Returns the stable persistence code for this status.
+    #[must_use]
+    pub const fn code(&self) -> &'static str {
+        return match self {
+            Self::Open => "open",
+            Self::Resolved => "resolved",
+        };
+    }
+}
+
 /// Canonical source-independent N1 RAW transaction persisted by Store backends.
 ///
 /// The payload must contain the complete KSP canonical transaction representation required
@@ -41,14 +228,12 @@ pub struct RawTransaction {
     reference: crate::RawTransactionReference,
     slot: u64,
 }
-
 impl RawTransaction {
     /// Creates one complete canonical RAW transaction.
     #[must_use]
     pub fn new(reference: crate::RawTransactionReference, slot: u64, block_time: std::option::Option<crate::RawTimestamp>, payload: crate::RawPayload) -> Self {
         return Self { block_time, payload, reference, slot };
     }
-
     /// Returns the optional canonical block timestamp.
     #[must_use]
     pub const fn block_time(&self) -> std::option::Option<crate::RawTimestamp> {
@@ -60,7 +245,6 @@ impl RawTransaction {
     pub fn payload(&self) -> &crate::RawPayload {
         return &self.payload;
     }
-
     /// Returns the durable backend-independent transaction identity.
     #[must_use]
     pub fn reference(&self) -> &crate::RawTransactionReference {
@@ -73,7 +257,6 @@ impl RawTransaction {
         return self.slot;
     }
 }
-
 /// Persistable acquisition observation linked to one canonical RAW transaction.
 #[derive(Clone, Debug, Eq, PartialEq)]
 pub struct RawTransactionObservation {
@@ -81,14 +264,12 @@ pub struct RawTransactionObservation {
     provenance: crate::RawAcquisitionProvenance,
     transaction: crate::RawTransactionReference,
 }
-
 impl RawTransactionObservation {
     /// Creates one successful observation of a complete canonical RAW transaction.
     #[must_use]
     pub fn new(observation_key: crate::RawObservationKey, transaction: crate::RawTransactionReference, provenance: crate::RawAcquisitionProvenance) -> Self {
         return Self { observation_key, provenance, transaction };
     }
-
     /// Returns the deterministic producer-owned observation idempotence key.
     #[must_use]
     pub const fn observation_key(&self) -> crate::RawObservationKey {
@@ -100,7 +281,6 @@ impl RawTransactionObservation {
     pub fn provenance(&self) -> &crate::RawAcquisitionProvenance {
         return &self.provenance;
     }
-
     /// Returns the durable transaction identity observed by this acquisition.
     #[must_use]
     pub fn transaction(&self) -> &crate::RawTransactionReference {
@@ -108,6 +288,30 @@ impl RawTransactionObservation {
     }
 }
 
+fn raw_variant_model_error(field: &'static str) -> crate::Error {
+    return crate::Error::new(crate::ERROR_CODE_RAW_MODEL_INVALID, "invalid RAW transaction variant model").with_context("field", field);
+}
+
+fn valid_variant_relation_reason(relation: crate::RawTransactionVariantRelation, reason: crate::RawTransactionVariantRelationReason) -> bool {
+    return matches!(
+        (relation, reason),
+        (crate::RawTransactionVariantRelation::Exact, crate::RawTransactionVariantRelationReason::ExactCanonicalContent)
+            | (crate::RawTransactionVariantRelation::CompatibleLessComplete, crate::RawTransactionVariantRelationReason::IncomingLogMessagesTruncated)
+            | (crate::RawTransactionVariantRelation::CompatibleMoreComplete, crate::RawTransactionVariantRelationReason::CanonicalLogMessagesTruncated)
+            | (
+                crate::RawTransactionVariantRelation::Conflict,
+                crate::RawTransactionVariantRelationReason::SlotMismatch
+                    | crate::RawTransactionVariantRelationReason::BlockTimeMismatch
+                    | crate::RawTransactionVariantRelationReason::CanonicalPayloadConflict
+                    | crate::RawTransactionVariantRelationReason::ContentHashCollision
+            )
+            | (
+                crate::RawTransactionVariantRelation::Incomparable,
+                crate::RawTransactionVariantRelationReason::PayloadFormatMismatch | crate::RawTransactionVariantRelationReason::UnsupportedCanonicalDifference
+            )
+    );
+}
+
 #[cfg(test)]
 #[path = "../../unit_tests/model/raw_transaction.rs"]
 mod tests;

crates/ksp-store-api/tests/release_completeness.rs

@@ -1,8 +1,7 @@
 // file: crates/ksp-store-api/tests/release_completeness.rs
-// version: 3
+// version: 4
 
 //! Release-level boundary and completeness canaries for the backend-neutral Store API RAW surface.
-
 #[test]
 fn v0_3_8_pre_003_exact_crate_root_export_inventory_is_stable() {
     let crate_root = include_str!("../src/lib.rs");
@@ -57,6 +56,7 @@ fn v0_3_8_pre_003_exact_crate_root_export_inventory_is_stable() {
         "pub use self::model::raw_outcome::RawAcquisitionWriteOutcome;",
         "pub use self::model::raw_outcome::RawEntityWriteOutcome;",
         "pub use self::model::raw_outcome::RawObservationWriteOutcome;",
+        "pub use self::model::raw_outcome::RawTransactionVariantWriteOutcome;",
         "pub use self::model::raw_pagination::MAX_RAW_PAGE_CURSOR_BYTES;",
         "pub use self::model::raw_pagination::RawAccountStateQuery;",
         "pub use self::model::raw_pagination::RawPage;",
@@ -87,15 +87,21 @@ fn v0_3_8_pre_003_exact_crate_root_export_inventory_is_stable() {
         "pub use self::model::raw_retention::RawTransactionRetentionTransition;",
         "pub use self::model::raw_retention::RawTransactionTombstone;",
         "pub use self::model::raw_transaction::RawTransaction;",
+        "pub use self::model::raw_transaction::RawTransactionConflictStatus;",
         "pub use self::model::raw_transaction::RawTransactionObservation;",
         "pub use self::model::raw_transaction::RawTransactionReference;",
+        "pub use self::model::raw_transaction::RawTransactionVariantComparison;",
+        "pub use self::model::raw_transaction::RawTransactionVariantId;",
+        "pub use self::model::raw_transaction::RawTransactionVariantOrigin;",
+        "pub use self::model::raw_transaction::RawTransactionVariantReference;",
+        "pub use self::model::raw_transaction::RawTransactionVariantRelation;",
+        "pub use self::model::raw_transaction::RawTransactionVariantRelationReason;",
     ];
     expected.sort_unstable();
     assert_eq!(actual, expected);
     assert!(!crate_root.contains("pub mod "));
     return;
 }
-
 #[test]
 fn v0_3_8_pre_003_exact_production_module_inventory_is_raw_only() {
     let root = std::path::Path::new(env!("CARGO_MANIFEST_DIR")).join("src");
@@ -125,7 +131,6 @@ fn v0_3_8_pre_003_exact_production_module_inventory_is_raw_only() {
     assert_eq!(capability_names, std::vec!["raw_account.rs", "raw_retention.rs", "raw_transaction.rs"]);
     return;
 }
-
 #[test]
 fn pre_007_public_evolutive_enums_remain_non_exhaustive() {
     let sources = [
@@ -133,6 +138,7 @@ fn pre_007_public_evolutive_enums_remain_non_exhaustive() {
         include_str!("../src/model/raw_pagination.rs"),
         include_str!("../src/model/raw_primitives.rs"),
         include_str!("../src/model/raw_retention.rs"),
+        include_str!("../src/model/raw_transaction.rs"),
     ];
     for enum_name in [
         "RawAcquisitionOrigin",
@@ -142,12 +148,16 @@ fn pre_007_public_evolutive_enums_remain_non_exhaustive() {
         "RawRetentionWriteOutcome",
         "RawSortDirection",
         "RawTransactionAcquisitionMode",
+        "RawTransactionConflictStatus",
+        "RawTransactionVariantOrigin",
+        "RawTransactionVariantRelation",
+        "RawTransactionVariantRelationReason",
+        "RawTransactionVariantWriteOutcome",
     ] {
         assert_non_exhaustive(&sources, enum_name);
     }
     return;
 }
-
 #[test]
 fn pre_007_interface_store_ownership_and_negative_scope_remain_explicit() {
     let interface_root = include_str!("../../ksp-interface-lib/src/lib.rs");
@@ -189,7 +199,6 @@ fn pre_007_interface_store_ownership_and_negative_scope_remain_explicit() {
     }
     return;
 }
-
 #[test]
 fn v0_3_8_pre_003_capability_inventory_stays_fine_grained_without_runtime_facade() {
     let sources = [
@@ -227,7 +236,6 @@ fn v0_3_8_pre_003_capability_inventory_stays_fine_grained_without_runtime_facade
     assert_eq!(traits, expected);
     return;
 }
-
 fn assert_non_exhaustive(sources: &[&str], enum_name: &str) {
     let needle = "#[non_exhaustive]\n";
     let declaration = std::format!("pub enum {enum_name}");
@@ -243,7 +251,6 @@ fn assert_non_exhaustive(sources: &[&str], enum_name: &str) {
     assert!(found, "public evolutive enum not found: {enum_name}");
     return;
 }
-
 fn rust_file_names(directory: &std::path::Path) -> std::io::Result<std::vec::Vec<std::string::String>> {
     let entries = match std::fs::read_dir(directory) {
         std::result::Result::Ok(value) => value,

crates/ksp-store-api/unit_tests/model/raw_transaction.rs

@@ -1,5 +1,5 @@
 // file: crates/ksp-store-api/unit_tests/model/raw_transaction.rs
-// version: 2
+// version: 3
 
 fn network() -> std::option::Option<crate::RawNetworkId> {
     return match crate::RawNetworkId::new("mainnet".to_owned()) {
@@ -83,3 +83,60 @@ fn transaction_observation_is_separate_from_canonical_raw_payload() {
     assert_eq!(observation.provenance().provider().as_str(), "publicnode");
     return;
 }
+
+#[test]
+fn transaction_variant_identity_is_non_zero_and_keeps_transaction_scope() {
+    assert!(crate::RawTransactionVariantId::try_new(0).is_err());
+    let variant_id = match crate::RawTransactionVariantId::try_new(7) {
+        std::result::Result::Ok(value) => value,
+        std::result::Result::Err(_) => return,
+    };
+    let network = match network() {
+        std::option::Option::Some(value) => value,
+        std::option::Option::None => return,
+    };
+    let transaction = crate::RawTransactionReference::new(network, crate::RawTransactionSignature::new([13_u8; 64]));
+    let variant = crate::RawTransactionVariantReference::new(transaction, variant_id);
+    assert_eq!(variant.variant_id().get(), 7);
+    assert_eq!(variant.transaction().network().as_str(), "mainnet");
+    assert_eq!(crate::RawTransactionVariantOrigin::Native.code(), "native");
+    assert_eq!(crate::RawTransactionVariantOrigin::Synthetic.code(), "synthetic");
+    return;
+}
+
+#[test]
+fn transaction_variant_relation_reason_pairs_are_validated() {
+    let exact = crate::RawTransactionVariantComparison::try_new(
+        crate::RawTransactionVariantRelation::Exact,
+        crate::RawTransactionVariantRelationReason::ExactCanonicalContent,
+    );
+    assert!(exact.is_ok());
+    let invalid = crate::RawTransactionVariantComparison::try_new(
+        crate::RawTransactionVariantRelation::Exact,
+        crate::RawTransactionVariantRelationReason::IncomingLogMessagesTruncated,
+    );
+    assert!(invalid.is_err());
+    let conflict = crate::RawTransactionVariantComparison::try_new(
+        crate::RawTransactionVariantRelation::Conflict,
+        crate::RawTransactionVariantRelationReason::ContentHashCollision,
+    );
+    assert!(conflict.is_ok());
+    let incomparable = crate::RawTransactionVariantComparison::try_new(
+        crate::RawTransactionVariantRelation::Incomparable,
+        crate::RawTransactionVariantRelationReason::PayloadFormatMismatch,
+    );
+    assert!(incomparable.is_ok());
+    return;
+}
+
+#[test]
+fn transaction_variant_codes_and_outcomes_are_stable_backend_neutral_contracts() {
+    assert_eq!(crate::RawTransactionVariantRelation::CompatibleLessComplete.code(), "compatible_less_complete");
+    assert_eq!(crate::RawTransactionVariantRelationReason::IncomingLogMessagesTruncated.code(), "incoming_log_messages_truncated");
+    assert_eq!(crate::RawTransactionVariantRelationReason::ContentHashCollision.code(), "content_hash_collision");
+    assert_eq!(crate::RawTransactionConflictStatus::Open.code(), "open");
+    assert_eq!(crate::RawTransactionConflictStatus::Resolved.code(), "resolved");
+    assert_ne!(crate::RawTransactionVariantWriteOutcome::InsertedCanonical, crate::RawTransactionVariantWriteOutcome::ObservedExact);
+    assert_ne!(crate::RawTransactionVariantWriteOutcome::QuarantinedConflict, crate::RawTransactionVariantWriteOutcome::PromotedCompatibleMoreComplete);
+    return;
+}