diff --git a/Cargo.toml b/Cargo.toml
index 650b06a..f3b42fe 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,12 +1,12 @@
 # file: Cargo.toml
-# version: 492
+# version: 493
 
 [workspace]
 resolver = "3"
 members = ["crates/ksp-app-backfill-desk", "crates/ksp-app-config-desk", "crates/ksp-app-solprices-desk", "crates/ksp-app-store-desk", "crates/ksp-app-wallet-desk", "crates/ksp-config-lib", "crates/ksp-core-lib", "crates/ksp-interface-lib", "crates/ksp-job-api", "crates/ksp-job-backfill-lib", "crates/ksp-logging-lib", "crates/ksp-offchain-transport-lib", "crates/ksp-onchain-transport-lib", "crates/ksp-program-api", "crates/ksp-raw-transaction-lib", "crates/ksp-store-api", "crates/ksp-store-lib", "crates/ksp-store-postgres-lib", "crates/ksp-wallet-lib", "crates/ksp-worker-api"]
 
 [workspace.package]
-version = "0.3.10-pre.2.fix.1"
+version = "0.3.10-pre.3"
 edition = "2024"
 license = "MIT"
 repository = "https://git.sasedev.com/Sasedev/khadhroony-solana-project"
diff --git a/crates/ksp-job-backfill-lib/Cargo.toml b/crates/ksp-job-backfill-lib/Cargo.toml
index f8af817..474dcfd 100644
--- a/crates/ksp-job-backfill-lib/Cargo.toml
+++ b/crates/ksp-job-backfill-lib/Cargo.toml
@@ -1,5 +1,5 @@
 # file: crates/ksp-job-backfill-lib/Cargo.toml
-# version: 4
+# version: 5
 
 [package]
 name = "ksp-job-backfill-lib"
@@ -13,6 +13,7 @@ ksp-core-lib = { path = "../ksp-core-lib" }
 ksp-job-api = { path = "../ksp-job-api" }
 ksp-logging-lib = { path = "../ksp-logging-lib" }
 ksp-onchain-transport-lib = { path = "../ksp-onchain-transport-lib" }
+ksp-raw-transaction-lib = { path = "../ksp-raw-transaction-lib" }
 ksp-store-lib = { path = "../ksp-store-lib", default-features = false }
 serde_json.workspace = true
 sha2.workspace = true
diff --git a/crates/ksp-job-backfill-lib/README.md b/crates/ksp-job-backfill-lib/README.md
index eeb1c3f..9f50b28 100644
--- a/crates/ksp-job-backfill-lib/README.md
+++ b/crates/ksp-job-backfill-lib/README.md
@@ -1,11 +1,11 @@
 <!-- file: crates/ksp-job-backfill-lib/README.md -->
-<!-- version: 1 -->
+<!-- version: 2 -->
 
 # ksp-job-backfill-lib
 
 `ksp-job-backfill-lib` implémente le premier job historique concret de KSP : un backfill borné de transactions Solana vers la couche RAW durable.
 
-La crate compose les contrats Job, Transport observé et Store backend-neutral sans posséder leurs politiques internes. Elle couvre l'admission, la découverte historique, l'hydratation `getTransaction`, la conversion RAW v1, la persistance atomique, la concurrence bornée, la frontier contiguë, le checkpoint caller-owned, l'annulation coopérative et les snapshots latest-value.
+La crate compose les contrats Job, Transport observé, common RAW et Store backend-neutral sans posséder leurs politiques internes. Elle couvre l'admission, la découverte historique, l'hydratation `getTransaction`, l'adaptation vers `ksp-raw-transaction-lib`, la persistance atomique, la concurrence bornée, la frontier contiguë, le checkpoint caller-owned, l'annulation coopérative et les snapshots latest-value.
 
 ## Identité
 
@@ -94,6 +94,7 @@ ksp-core-lib
 ksp-job-api
 ksp-logging-lib
 ksp-onchain-transport-lib
+ksp-raw-transaction-lib
 ksp-store-lib (default-features = false)
 futures-util
 serde_json
diff --git a/crates/ksp-job-backfill-lib/src/conversion.rs b/crates/ksp-job-backfill-lib/src/conversion.rs
index b445ac2..8d50d22 100644
--- a/crates/ksp-job-backfill-lib/src/conversion.rs
+++ b/crates/ksp-job-backfill-lib/src/conversion.rs
@@ -1,18 +1,13 @@
 // file: crates/ksp-job-backfill-lib/src/conversion.rs
-// version: 4
+// version: 5
 
 use sha2::Digest; // rust-rules: trait-import
 
-/// KSP-owned source-independent RAW transaction format identifier produced by this Backfill vertical.
-pub const RAW_TRANSACTION_FORMAT_ID: &str = "ksp.solana.raw_transaction";
-/// Initial KSP-owned RAW transaction format version produced by this Backfill vertical.
-pub const RAW_TRANSACTION_FORMAT_VERSION: u32 = 1;
-
 const RAW_TRANSACTION_METHOD_CODE: &str = "getTransaction";
 const RAW_TRANSACTION_OBSERVATION_CONTRACT_VERSION: u32 = 1;
 const RAW_TRANSACTION_PROTOCOL_CODE: &str = "solana.http.json_rpc";
 
-/// Complete in-memory RAW transaction acquisition ready for the later Store persistence tranche.
+/// Complete in-memory RAW transaction acquisition ready for Store persistence.
 #[derive(Debug)]
 pub struct BackfillRawAcquisition {
     inner: Box<BackfillRawAcquisitionInner>,
@@ -20,35 +15,34 @@ pub struct BackfillRawAcquisition {
 
 #[derive(Debug)]
 struct BackfillRawAcquisitionInner {
-    transaction: ksp_store_lib::RawTransaction,
-    observation: ksp_store_lib::RawTransactionObservation,
+    acquisition: ksp_raw_transaction_lib::RawTransactionAcquisition,
 }
 
 impl crate::BackfillRawAcquisition {
-    /// Returns the canonical RAW transaction produced from the typed Transport response.
+    /// Returns the canonical RAW transaction produced through the source-neutral common layer.
     #[must_use]
-    pub const fn transaction(&self) -> &ksp_store_lib::RawTransaction {
-        return &self.inner.transaction;
+    pub fn transaction(&self) -> &ksp_store_lib::RawTransaction {
+        return self.inner.acquisition.transaction();
     }
 
-    /// Returns the acquisition observation whose provenance records the actual successful endpoint.
+    /// Returns the Backfill-owned acquisition observation linked by the common assembly layer.
     #[must_use]
-    pub const fn observation(&self) -> &ksp_store_lib::RawTransactionObservation {
-        return &self.inner.observation;
+    pub fn observation(&self) -> &ksp_store_lib::RawTransactionObservation {
+        return self.inner.acquisition.observation();
     }
 
-    /// Consumes the in-memory acquisition into the canonical transaction and its observation.
+    /// Consumes the in-memory acquisition into the canonical transaction and its Backfill-owned observation.
     #[must_use]
     pub fn into_parts(self) -> (ksp_store_lib::RawTransaction, ksp_store_lib::RawTransactionObservation) {
         let inner = *self.inner;
-        return (inner.transaction, inner.observation);
+        return inner.acquisition.into_parts();
     }
 }
 
 /// Result of hydrating one deterministic Backfill candidate through observed `getTransaction`.
 #[derive(Debug)]
 pub enum BackfillHydrationOutcome {
-    /// The RPC returned one complete transaction and conversion produced canonical RAW plus provenance.
+    /// The RPC returned one complete transaction and common conversion produced canonical RAW plus Backfill provenance.
     Available(crate::BackfillRawAcquisition),
     /// The RPC returned JSON `null`; only the canonical transaction identity exists and no provenance is fabricated.
     Missing(ksp_store_lib::RawTransactionReference),
@@ -71,11 +65,12 @@ impl crate::BackfillHydrationOutcome {
     }
 }
 
-/// Hydrates one candidate with the typed observed Transport path and converts it to canonical RAW v1.
+/// Hydrates one candidate with the typed observed Transport path and converts it through the common RAW v1 layer.
 ///
 /// The caller supplies the local receipt timestamp because wall-clock ownership remains outside this
-/// pure conversion tranche. Transport retains endpoint selection and retry. This function never
-/// persists to Store; persistence begins in `pre.007`.
+/// pure conversion path. Transport retains endpoint selection and retry. Backfill retains campaign
+/// provenance and observation-key ownership; the common crate owns signature parsing, RAW v1
+/// canonicalization, content hashing and transaction/observation assembly.
 pub async fn hydrate_backfill_candidate(
     transport: &ksp_onchain_transport_lib::HttpTransportPool,
     request: &crate::BackfillRequest,
@@ -105,12 +100,12 @@ pub async fn hydrate_backfill_candidate(
         std::option::Option::None => return std::result::Result::Ok(crate::BackfillHydrationOutcome::Missing(reference)),
     };
     let fields = CanonicalTransactionFields {
-        slot: transaction.slot(),
         block_time: transaction.block_time(),
-        transaction: transaction.transaction(),
         meta: transaction.meta(),
-        version: transaction.version(),
+        slot: transaction.slot(),
+        transaction: transaction.transaction(),
         transaction_index: transaction.transaction_index(),
+        version: transaction.version(),
     };
     let acquisition = convert_available_fields(request, reference, fields, provider.as_str(), endpoint.as_str(), received_at);
     return match acquisition {
@@ -119,49 +114,22 @@ pub async fn hydrate_backfill_candidate(
     };
 }
 
-/// Decodes one validated Base58 signature to exactly 64 canonical bytes without a Solana SDK dependency.
+/// Decodes one validated Base58 signature through the source-neutral common parser while preserving Backfill error semantics.
 pub(crate) fn decode_backfill_signature(signature: &crate::BackfillSignature) -> ksp_core_lib::Result<ksp_store_lib::RawTransactionSignature> {
-    let text = signature.as_str().as_bytes();
-    let mut decoded = [0_u8; 64];
-    let mut leading_zeroes = 0_usize;
-    for byte in text {
-        if *byte != b'1' {
-            break;
-        }
-        leading_zeroes += 1;
-    }
-    for byte in text {
-        let digit = match base58_digit(*byte) {
-            std::option::Option::Some(digit) => digit,
-            std::option::Option::None => return std::result::Result::Err(conversion_error("signature")),
-        };
-        let mut carry = u32::from(digit);
-        for output in decoded.iter_mut().rev() {
-            let value = (u32::from(*output) * 58) + carry;
-            *output = (value & 0xff) as u8;
-            carry = value >> 8;
-        }
-        if carry != 0 {
-            return std::result::Result::Err(conversion_error("signature"));
-        }
-    }
-    let significant_len = match decoded.iter().position(|byte| return *byte != 0) {
-        std::option::Option::Some(index) => decoded.len() - index,
-        std::option::Option::None => 0,
+    let parsed = ksp_raw_transaction_lib::parse_raw_transaction_signature(signature.as_str());
+    return match parsed {
+        std::result::Result::Ok(signature) => std::result::Result::Ok(signature),
+        std::result::Result::Err(_) => std::result::Result::Err(conversion_error("signature")),
     };
-    if leading_zeroes + significant_len != decoded.len() {
-        return std::result::Result::Err(conversion_error("signature"));
-    }
-    return std::result::Result::Ok(ksp_store_lib::RawTransactionSignature::new(decoded));
 }
 
 struct CanonicalTransactionFields<'a> {
-    slot: u64,
     block_time: std::option::Option<i64>,
-    transaction: &'a ksp_onchain_transport_lib::SolanaEncodedTransaction,
     meta: &'a ksp_onchain_transport_lib::SolanaWireField<serde_json::Value>,
-    version: &'a ksp_onchain_transport_lib::SolanaWireField<ksp_onchain_transport_lib::SolanaTransactionVersion>,
+    slot: u64,
+    transaction: &'a ksp_onchain_transport_lib::SolanaEncodedTransaction,
     transaction_index: &'a ksp_onchain_transport_lib::SolanaWireField<u32>,
+    version: &'a ksp_onchain_transport_lib::SolanaWireField<ksp_onchain_transport_lib::SolanaTransactionVersion>,
 }
 
 fn canonical_reference(request: &crate::BackfillRequest, candidate: &crate::BackfillCandidate) -> ksp_core_lib::Result<ksp_store_lib::RawTransactionReference> {
@@ -184,30 +152,9 @@ fn convert_available_fields(
     endpoint: &str,
     received_at: ksp_store_lib::RawTimestamp,
 ) -> ksp_core_lib::Result<crate::BackfillRawAcquisition> {
-    let block_time = convert_block_time(fields.block_time);
-    let block_time = match block_time {
-        std::result::Result::Ok(block_time) => block_time,
-        std::result::Result::Err(error) => return std::result::Result::Err(error),
-    };
-    let bytes = canonical_payload_bytes(&fields);
-    let bytes = match bytes {
-        std::result::Result::Ok(bytes) => bytes,
-        std::result::Result::Err(error) => return std::result::Result::Err(error),
-    };
-    let hash: [u8; 32] = sha2::Sha256::digest(bytes.as_slice()).into();
-    let format_id = ksp_store_lib::RawFormatId::new(crate::RAW_TRANSACTION_FORMAT_ID);
-    let format_id = match format_id {
-        std::result::Result::Ok(format_id) => format_id,
-        std::result::Result::Err(_) => return std::result::Result::Err(conversion_error("payload.format_id")),
-    };
-    let payload = ksp_store_lib::RawPayload::try_new(
-        format_id,
-        crate::RAW_TRANSACTION_FORMAT_VERSION,
-        bytes.into_boxed_slice(),
-        ksp_store_lib::RawContentHash::new(hash),
-    );
-    let payload = match payload {
-        std::result::Result::Ok(payload) => payload,
+    let transaction = canonical_transaction(&reference, fields);
+    let transaction = match transaction {
+        std::result::Result::Ok(transaction) => transaction,
         std::result::Result::Err(error) => return std::result::Result::Err(error),
     };
     let provenance = build_provenance(request, provider, endpoint, received_at);
@@ -215,182 +162,60 @@ fn convert_available_fields(
         std::result::Result::Ok(provenance) => provenance,
         std::result::Result::Err(error) => return std::result::Result::Err(error),
     };
-    let observation_key = observation_key(request, &reference, provider, endpoint);
-    let transaction = ksp_store_lib::RawTransaction::new(reference.clone(), fields.slot, block_time, payload);
-    let observation = ksp_store_lib::RawTransactionObservation::new(observation_key, reference, provenance);
-    return std::result::Result::Ok(crate::BackfillRawAcquisition { inner: Box::new(BackfillRawAcquisitionInner { transaction, observation }) });
+    let observation_key = observation_key(request, transaction.reference(), provider, endpoint);
+    let acquisition = ksp_raw_transaction_lib::assemble_raw_transaction_acquisition(transaction, observation_key, provenance);
+    return std::result::Result::Ok(crate::BackfillRawAcquisition { inner: Box::new(BackfillRawAcquisitionInner { acquisition }) });
 }
 
-fn convert_block_time(value: std::option::Option<i64>) -> ksp_core_lib::Result<std::option::Option<ksp_store_lib::RawTimestamp>> {
-    let seconds = match value {
-        std::option::Option::Some(seconds) => seconds,
-        std::option::Option::None => return std::result::Result::Ok(std::option::Option::None),
-    };
-    let seconds = match u64::try_from(seconds) {
-        std::result::Result::Ok(seconds) => seconds,
-        std::result::Result::Err(_) => return std::result::Result::Err(conversion_error("block_time")),
-    };
-    let millis = match seconds.checked_mul(1_000) {
-        std::option::Option::Some(millis) => millis,
-        std::option::Option::None => return std::result::Result::Err(conversion_error("block_time")),
-    };
-    let timestamp = ksp_store_lib::RawTimestamp::from_unix_millis(millis);
-    return match timestamp {
-        std::result::Result::Ok(timestamp) => std::result::Result::Ok(std::option::Option::Some(timestamp)),
-        std::result::Result::Err(_) => std::result::Result::Err(conversion_error("block_time")),
-    };
-}
-
-fn canonical_payload_bytes(fields: &CanonicalTransactionFields<'_>) -> ksp_core_lib::Result<std::vec::Vec<u8>> {
-    let (transaction_data, transaction_encoding) = match fields.transaction {
-        ksp_onchain_transport_lib::SolanaEncodedTransaction::Binary { data, encoding } => {
-            if *encoding != ksp_onchain_transport_lib::SolanaTransactionBinaryEncoding::Base64 {
-                return std::result::Result::Err(conversion_error("transaction.encoding"));
-            }
-            (data.as_str(), "base64")
+fn canonical_transaction(
+    reference: &ksp_store_lib::RawTransactionReference,
+    fields: CanonicalTransactionFields<'_>,
+) -> ksp_core_lib::Result<ksp_store_lib::RawTransaction> {
+    let transaction_data = match fields.transaction {
+        ksp_onchain_transport_lib::SolanaEncodedTransaction::Binary { data, encoding }
+            if *encoding == ksp_onchain_transport_lib::SolanaTransactionBinaryEncoding::Base64 =>
+        {
+            data.clone()
         },
-        ksp_onchain_transport_lib::SolanaEncodedTransaction::LegacyBinary(_) | ksp_onchain_transport_lib::SolanaEncodedTransaction::Json(_) => {
+        ksp_onchain_transport_lib::SolanaEncodedTransaction::Binary { .. }
+        | ksp_onchain_transport_lib::SolanaEncodedTransaction::LegacyBinary(_)
+        | ksp_onchain_transport_lib::SolanaEncodedTransaction::Json(_) => {
             return std::result::Result::Err(conversion_error("transaction.encoding"));
         },
     };
-    let mut bytes = std::vec::Vec::new();
-    bytes.extend_from_slice(b"{\"transaction\":[");
-    if let std::result::Result::Err(error) = append_json_string(&mut bytes, transaction_data) {
-        return std::result::Result::Err(error);
-    }
-    bytes.push(b',');
-    if let std::result::Result::Err(error) = append_json_string(&mut bytes, transaction_encoding) {
-        return std::result::Result::Err(error);
-    }
-    bytes.push(b']');
-    if let std::result::Result::Err(error) = append_wire_value(&mut bytes, "meta", fields.meta, |output, value| return append_canonical_json(output, value)) {
-        return std::result::Result::Err(error);
-    }
-    let version_result = append_wire_value(&mut bytes, "version", fields.version, |output, value| {
+    let meta = map_wire_field(fields.meta, |value| return value.clone());
+    let version = map_wire_field(fields.version, |value| {
         return match value {
-            ksp_onchain_transport_lib::SolanaTransactionVersion::Legacy => append_json_string(output, "legacy"),
-            ksp_onchain_transport_lib::SolanaTransactionVersion::Number(number) => {
-                output.extend_from_slice(number.to_string().as_bytes());
-                std::result::Result::Ok(())
-            },
+            ksp_onchain_transport_lib::SolanaTransactionVersion::Legacy => ksp_raw_transaction_lib::RawTransactionVersion::Legacy,
+            ksp_onchain_transport_lib::SolanaTransactionVersion::Number(number) => ksp_raw_transaction_lib::RawTransactionVersion::Number(*number),
         };
     });
-    if let std::result::Result::Err(error) = version_result {
-        return std::result::Result::Err(error);
-    }
-    let transaction_index_result = append_wire_value(&mut bytes, "transactionIndex", fields.transaction_index, |output, value| {
-        output.extend_from_slice(value.to_string().as_bytes());
-        return std::result::Result::Ok(());
-    });
-    if let std::result::Result::Err(error) = transaction_index_result {
-        return std::result::Result::Err(error);
-    }
-    bytes.push(b'}');
-    return std::result::Result::Ok(bytes);
+    let transaction_index = map_wire_field(fields.transaction_index, |value| return *value);
+    let material = ksp_raw_transaction_lib::RawTransactionMaterial::binary_base64(
+        reference.network().clone(),
+        reference.signature(),
+        fields.slot,
+        fields.block_time,
+        transaction_data,
+        meta,
+        version,
+        transaction_index,
+    );
+    let canonical = ksp_raw_transaction_lib::canonicalize_raw_transaction(material);
+    return match canonical {
+        std::result::Result::Ok(transaction) => std::result::Result::Ok(transaction),
+        std::result::Result::Err(_) => std::result::Result::Err(conversion_error("common.canonicalization")),
+    };
 }
 
-fn append_wire_value<T, F>(
-    output: &mut std::vec::Vec<u8>,
-    key: &str,
-    field: &ksp_onchain_transport_lib::SolanaWireField<T>,
-    mut append_value: F,
-) -> ksp_core_lib::Result<()>
+fn map_wire_field<T, U, F>(field: &ksp_onchain_transport_lib::SolanaWireField<T>, mut map_value: F) -> ksp_raw_transaction_lib::RawTransactionWireField<U>
 where
-    F: FnMut(&mut std::vec::Vec<u8>, &T) -> ksp_core_lib::Result<()>,
+    F: FnMut(&T) -> U,
 {
     return match field {
-        ksp_onchain_transport_lib::SolanaWireField::Omitted => std::result::Result::Ok(()),
-        ksp_onchain_transport_lib::SolanaWireField::Null => {
-            output.push(b',');
-            let key_result = append_json_string(output, key);
-            if let std::result::Result::Err(error) = key_result {
-                return std::result::Result::Err(error);
-            }
-            output.extend_from_slice(b":null");
-            std::result::Result::Ok(())
-        },
-        ksp_onchain_transport_lib::SolanaWireField::Value(value) => {
-            output.push(b',');
-            let key_result = append_json_string(output, key);
-            if let std::result::Result::Err(error) = key_result {
-                return std::result::Result::Err(error);
-            }
-            output.push(b':');
-            append_value(output, value)
-        },
-    };
-}
-
-fn append_canonical_json(output: &mut std::vec::Vec<u8>, value: &serde_json::Value) -> ksp_core_lib::Result<()> {
-    return match value {
-        serde_json::Value::Null => {
-            output.extend_from_slice(b"null");
-            std::result::Result::Ok(())
-        },
-        serde_json::Value::Bool(value) => {
-            if *value {
-                output.extend_from_slice(b"true");
-            } else {
-                output.extend_from_slice(b"false");
-            }
-            std::result::Result::Ok(())
-        },
-        serde_json::Value::Number(value) => {
-            output.extend_from_slice(value.to_string().as_bytes());
-            std::result::Result::Ok(())
-        },
-        serde_json::Value::String(value) => append_json_string(output, value.as_str()),
-        serde_json::Value::Array(values) => {
-            output.push(b'[');
-            for (index, item) in values.iter().enumerate() {
-                if index != 0 {
-                    output.push(b',');
-                }
-                let item_result = append_canonical_json(output, item);
-                if let std::result::Result::Err(error) = item_result {
-                    return std::result::Result::Err(error);
-                }
-            }
-            output.push(b']');
-            std::result::Result::Ok(())
-        },
-        serde_json::Value::Object(values) => {
-            output.push(b'{');
-            let mut keys = values.keys().collect::<std::vec::Vec<_>>();
-            keys.sort_unstable();
-            for (index, key) in keys.iter().enumerate() {
-                if index != 0 {
-                    output.push(b',');
-                }
-                let key_result = append_json_string(output, key.as_str());
-                if let std::result::Result::Err(error) = key_result {
-                    return std::result::Result::Err(error);
-                }
-                output.push(b':');
-                let item = values.get(key.as_str());
-                let item = match item {
-                    std::option::Option::Some(item) => item,
-                    std::option::Option::None => return std::result::Result::Err(conversion_error("payload.meta")),
-                };
-                let item_result = append_canonical_json(output, item);
-                if let std::result::Result::Err(error) = item_result {
-                    return std::result::Result::Err(error);
-                }
-            }
-            output.push(b'}');
-            std::result::Result::Ok(())
-        },
-    };
-}
-
-fn append_json_string(output: &mut std::vec::Vec<u8>, value: &str) -> ksp_core_lib::Result<()> {
-    let encoded = serde_json::to_vec(value);
-    return match encoded {
-        std::result::Result::Ok(encoded) => {
-            output.extend_from_slice(encoded.as_slice());
-            std::result::Result::Ok(())
-        },
-        std::result::Result::Err(_) => std::result::Result::Err(conversion_error("payload.json")),
+        ksp_onchain_transport_lib::SolanaWireField::Omitted => ksp_raw_transaction_lib::RawTransactionWireField::Omitted,
+        ksp_onchain_transport_lib::SolanaWireField::Null => ksp_raw_transaction_lib::RawTransactionWireField::Null,
+        ksp_onchain_transport_lib::SolanaWireField::Value(value) => ksp_raw_transaction_lib::RawTransactionWireField::Value(map_value(value)),
     };
 }
 
@@ -463,18 +288,6 @@ fn hash_bytes(hasher: &mut sha2::Sha256, value: &[u8]) {
     hasher.update(value);
 }
 
-fn base58_digit(byte: u8) -> std::option::Option<u8> {
-    return match byte {
-        b'1'..=b'9' => std::option::Option::Some(byte - b'1'),
-        b'A'..=b'H' => std::option::Option::Some((byte - b'A') + 9),
-        b'J'..=b'N' => std::option::Option::Some((byte - b'J') + 17),
-        b'P'..=b'Z' => std::option::Option::Some((byte - b'P') + 22),
-        b'a'..=b'k' => std::option::Option::Some((byte - b'a') + 33),
-        b'm'..=b'z' => std::option::Option::Some((byte - b'm') + 44),
-        _ => std::option::Option::None,
-    };
-}
-
 fn conversion_error(field: &'static str) -> ksp_core_lib::Error {
     return ksp_core_lib::Error::new(crate::ERROR_CODE_BACKFILL_RAW_CONVERSION_INVALID, "invalid deterministic Backfill RAW conversion")
         .with_context("field", field);
diff --git a/crates/ksp-job-backfill-lib/src/lib.rs b/crates/ksp-job-backfill-lib/src/lib.rs
index 46ba21e..7c5b40a 100644
--- a/crates/ksp-job-backfill-lib/src/lib.rs
+++ b/crates/ksp-job-backfill-lib/src/lib.rs
@@ -1,5 +1,5 @@
 // file: crates/ksp-job-backfill-lib/src/lib.rs
-// version: 6
+// version: 7
 
 #![warn(missing_docs)]
 #![deny(unreachable_pub)]
@@ -30,10 +30,6 @@ pub use self::checkpoint::BackfillCheckpoint;
 pub use self::conversion::BackfillHydrationOutcome;
 /// Complete in-memory RAW transaction acquisition ready for later Store persistence.
 pub use self::conversion::BackfillRawAcquisition;
-/// KSP-owned source-independent RAW transaction format identifier produced by this Backfill vertical.
-pub use self::conversion::RAW_TRANSACTION_FORMAT_ID;
-/// Initial KSP-owned RAW transaction format version produced by this Backfill vertical.
-pub use self::conversion::RAW_TRANSACTION_FORMAT_VERSION;
 /// Hydrates one candidate through observed Transport and converts a non-null response to canonical RAW v1.
 pub use self::conversion::hydrate_backfill_candidate;
 /// One deterministic transaction candidate produced by bounded discovery.
@@ -112,6 +108,10 @@ pub use self::runtime::BackfillJobRuntime;
 pub use self::runtime::BackfillJobSnapshot;
 /// Cloneable runtime-neutral-facing latest-value source for concrete Backfill snapshots.
 pub use self::runtime::BackfillSnapshotSource;
+/// KSP-owned source-independent RAW transaction format identifier re-exported from the common RAW layer.
+pub use ksp_raw_transaction_lib::RAW_TRANSACTION_FORMAT_ID;
+/// Frozen RAW transaction format version re-exported from the common RAW layer.
+pub use ksp_raw_transaction_lib::RAW_TRANSACTION_FORMAT_VERSION;
 
 /// Internal contiguous completion frontier used by bounded execution.
 pub(crate) use self::checkpoint::CompletionFrontier;
diff --git a/crates/ksp-job-backfill-lib/src/request.rs b/crates/ksp-job-backfill-lib/src/request.rs
index 6c972d4..4fc1540 100644
--- a/crates/ksp-job-backfill-lib/src/request.rs
+++ b/crates/ksp-job-backfill-lib/src/request.rs
@@ -1,5 +1,5 @@
 // file: crates/ksp-job-backfill-lib/src/request.rs
-// version: 6
+// version: 7
 
 use sha2::Digest; // rust-rules: trait-import
 
@@ -12,9 +12,9 @@ pub const MAX_BACKFILL_PAGES: usize = 10_000;
 /// Maximum page size admitted for one `getSignaturesForAddress` request.
 pub const MAX_BACKFILL_PAGE_SIZE: usize = 1_000;
 /// Maximum Base58 text length possible for one canonical 64-byte Solana signature.
-pub const MAX_BACKFILL_SIGNATURE_TEXT_BYTES: usize = 88;
+pub const MAX_BACKFILL_SIGNATURE_TEXT_BYTES: usize = ksp_raw_transaction_lib::MAX_RAW_TRANSACTION_SIGNATURE_TEXT_BYTES;
 /// Minimum Base58 text length possible for one canonical 64-byte Solana signature.
-pub const MIN_BACKFILL_SIGNATURE_TEXT_BYTES: usize = 64;
+pub const MIN_BACKFILL_SIGNATURE_TEXT_BYTES: usize = ksp_raw_transaction_lib::MIN_RAW_TRANSACTION_SIGNATURE_TEXT_BYTES;
 
 /// Commitment levels intentionally admitted by the historical Backfill vertical.
 #[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
diff --git a/crates/ksp-job-backfill-lib/tests/dependency_boundary.rs b/crates/ksp-job-backfill-lib/tests/dependency_boundary.rs
index ccee3ad..1380eaa 100644
--- a/crates/ksp-job-backfill-lib/tests/dependency_boundary.rs
+++ b/crates/ksp-job-backfill-lib/tests/dependency_boundary.rs
@@ -1,10 +1,10 @@
 // file: crates/ksp-job-backfill-lib/tests/dependency_boundary.rs
-// version: 6
+// version: 7
 
 //! Dependency firewall canaries through the concrete cancellation and latest-value runtime tranche.
 
 #[test]
-fn pre_009_manifest_uses_only_planned_ksp_edges_and_private_tokio_runtime() {
+fn pre_003_manifest_adds_common_raw_edge_without_crossing_store_or_runtime_boundaries() {
     let manifest = include_str!("../Cargo.toml");
     for required in [
         "futures-util = { workspace = true, features = [\"std\"] }",
@@ -12,6 +12,7 @@ fn pre_009_manifest_uses_only_planned_ksp_edges_and_private_tokio_runtime() {
         "ksp-job-api = { path = \"../ksp-job-api\" }",
         "ksp-logging-lib = { path = \"../ksp-logging-lib\" }",
         "ksp-onchain-transport-lib = { path = \"../ksp-onchain-transport-lib\" }",
+        "ksp-raw-transaction-lib = { path = \"../ksp-raw-transaction-lib\" }",
         "ksp-store-lib = { path = \"../ksp-store-lib\", default-features = false }",
         "serde_json.workspace = true",
         "sha2.workspace = true",
@@ -56,7 +57,12 @@ fn pre_009_production_sources_keep_transport_store_and_scheduler_ownership_separ
         }
     }
     let conversion = include_str!("../src/conversion.rs");
-    assert!(conversion.contains("serde_json::"));
+    assert!(conversion.contains("ksp_raw_transaction_lib::canonicalize_raw_transaction"));
+    assert!(conversion.contains("ksp_raw_transaction_lib::assemble_raw_transaction_acquisition"));
+    assert!(conversion.contains("ksp_raw_transaction_lib::parse_raw_transaction_signature"));
+    assert!(!conversion.contains("fn append_canonical_json"));
+    assert!(!conversion.contains("fn base58_digit"));
+    assert!(!conversion.contains("RawPayload::try_new"));
     assert!(conversion.contains("get_transaction_observed"));
     assert!(conversion.contains("SolanaTransactionEncoding::Base64"));
     assert!(conversion.contains("std::option::Option::Some(0)"));
diff --git a/crates/ksp-job-backfill-lib/tests/hardening.rs b/crates/ksp-job-backfill-lib/tests/hardening.rs
index 5898929..160aef9 100644
--- a/crates/ksp-job-backfill-lib/tests/hardening.rs
+++ b/crates/ksp-job-backfill-lib/tests/hardening.rs
@@ -1,5 +1,5 @@
 // file: crates/ksp-job-backfill-lib/tests/hardening.rs
-// version: 4
+// version: 5
 
 //! Adversarial, security, visibility and external-boundary hardening canaries for `pre.010`.
 
@@ -268,6 +268,7 @@ fn pre_010_manifest_dependency_surface_is_exact_and_backend_neutral() {
             "ksp-job-api",
             "ksp-logging-lib",
             "ksp-onchain-transport-lib",
+            "ksp-raw-transaction-lib",
             "ksp-store-lib",
             "serde_json.workspace",
             "sha2.workspace",
@@ -328,6 +329,7 @@ fn pre_010_lower_layers_have_no_dependency_return_to_job() {
         include_str!("../../ksp-core-lib/Cargo.toml"),
         include_str!("../../ksp-logging-lib/Cargo.toml"),
         include_str!("../../ksp-onchain-transport-lib/Cargo.toml"),
+        include_str!("../../ksp-raw-transaction-lib/Cargo.toml"),
         include_str!("../../ksp-store-api/Cargo.toml"),
         include_str!("../../ksp-store-lib/Cargo.toml"),
         include_str!("../../ksp-store-postgres-lib/Cargo.toml"),
diff --git a/crates/ksp-job-backfill-lib/unit_tests/conversion.rs b/crates/ksp-job-backfill-lib/unit_tests/conversion.rs
index ffc1746..4844b59 100644
--- a/crates/ksp-job-backfill-lib/unit_tests/conversion.rs
+++ b/crates/ksp-job-backfill-lib/unit_tests/conversion.rs
@@ -1,5 +1,5 @@
 // file: crates/ksp-job-backfill-lib/unit_tests/conversion.rs
-// version: 2
+// version: 3
 
 fn signature_text() -> std::option::Option<crate::BackfillSignature> {
     return match crate::BackfillSignature::new("1".repeat(64)) {
@@ -46,6 +46,14 @@ fn candidate(network: &str, signature: crate::BackfillSignature) -> std::option:
     return std::option::Option::Some(crate::BackfillCandidate::new(crate::BackfillCandidateIdentity::new(network, signature), std::option::Option::Some(42)));
 }
 
+fn raw_reference(network: &str) -> std::option::Option<ksp_store_lib::RawTransactionReference> {
+    let network = match ksp_store_lib::RawNetworkId::new(network) {
+        std::result::Result::Ok(value) => value,
+        std::result::Result::Err(_) => return std::option::Option::None,
+    };
+    return std::option::Option::Some(ksp_store_lib::RawTransactionReference::new(network, ksp_store_lib::RawTransactionSignature::new([0_u8; 64])));
+}
+
 fn received_at() -> std::option::Option<ksp_store_lib::RawTimestamp> {
     return match ksp_store_lib::RawTimestamp::from_unix_millis(1_700_000_001_000) {
         std::result::Result::Ok(value) => std::option::Option::Some(value),
@@ -169,21 +177,26 @@ fn pre_006_wire_omission_and_null_produce_distinct_canonical_bytes() {
     let version_null = ksp_onchain_transport_lib::SolanaWireField::Null;
     let transaction_index_omitted = ksp_onchain_transport_lib::SolanaWireField::Omitted;
     let transaction_index_null = ksp_onchain_transport_lib::SolanaWireField::Null;
-    let omitted = super::canonical_payload_bytes(&fields(&transaction, &meta_omitted, &version_omitted, &transaction_index_omitted, std::option::Option::None));
+    let reference = match raw_reference("devnet") {
+        std::option::Option::Some(value) => value,
+        std::option::Option::None => return,
+    };
+    let omitted =
+        super::canonical_transaction(&reference, fields(&transaction, &meta_omitted, &version_omitted, &transaction_index_omitted, std::option::Option::None));
     assert!(omitted.is_ok());
     let omitted = match omitted {
         std::result::Result::Ok(value) => value,
         std::result::Result::Err(_) => return,
     };
-    assert_eq!(omitted, b"{\"transaction\":[\"AQID\",\"base64\"]}");
-    let nulls = super::canonical_payload_bytes(&fields(&transaction, &meta_null, &version_null, &transaction_index_null, std::option::Option::None));
+    assert_eq!(omitted.payload().bytes(), b"{\"transaction\":[\"AQID\",\"base64\"]}");
+    let nulls = super::canonical_transaction(&reference, fields(&transaction, &meta_null, &version_null, &transaction_index_null, std::option::Option::None));
     assert!(nulls.is_ok());
     let nulls = match nulls {
         std::result::Result::Ok(value) => value,
         std::result::Result::Err(_) => return,
     };
-    assert_eq!(nulls, b"{\"transaction\":[\"AQID\",\"base64\"],\"meta\":null,\"version\":null,\"transactionIndex\":null}");
-    assert_ne!(omitted, nulls);
+    assert_eq!(nulls.payload().bytes(), b"{\"transaction\":[\"AQID\",\"base64\"],\"meta\":null,\"version\":null,\"transactionIndex\":null}");
+    assert_ne!(omitted.payload().bytes(), nulls.payload().bytes());
     return;
 }
 
@@ -198,8 +211,12 @@ fn pre_006_non_base64_transaction_shapes_are_rejected() {
     let meta = ksp_onchain_transport_lib::SolanaWireField::Omitted;
     let version = ksp_onchain_transport_lib::SolanaWireField::Omitted;
     let transaction_index = ksp_onchain_transport_lib::SolanaWireField::Omitted;
+    let reference = match raw_reference("devnet") {
+        std::option::Option::Some(value) => value,
+        std::option::Option::None => return,
+    };
     for transaction in [&base58, &legacy, &json] {
-        let result = super::canonical_payload_bytes(&fields(transaction, &meta, &version, &transaction_index, std::option::Option::None));
+        let result = super::canonical_transaction(&reference, fields(transaction, &meta, &version, &transaction_index, std::option::Option::None));
         assert!(result.is_err());
         if let std::result::Result::Err(error) = result {
             assert_eq!(error.code(), crate::ERROR_CODE_BACKFILL_RAW_CONVERSION_INVALID);
@@ -210,12 +227,26 @@ fn pre_006_non_base64_transaction_shapes_are_rejected() {
 
 #[test]
 fn pre_006_negative_and_unrepresentable_block_times_are_terminal_conversion_errors() {
-    let negative = super::convert_block_time(std::option::Option::Some(-1));
+    let reference = match raw_reference("devnet") {
+        std::option::Option::Some(value) => value,
+        std::option::Option::None => return,
+    };
+    let transaction = ksp_onchain_transport_lib::SolanaEncodedTransaction::Binary {
+        data: "AQID".to_owned(),
+        encoding: ksp_onchain_transport_lib::SolanaTransactionBinaryEncoding::Base64,
+    };
+    let meta = ksp_onchain_transport_lib::SolanaWireField::Omitted;
+    let version = ksp_onchain_transport_lib::SolanaWireField::Omitted;
+    let transaction_index = ksp_onchain_transport_lib::SolanaWireField::Omitted;
+    let negative = super::canonical_transaction(&reference, fields(&transaction, &meta, &version, &transaction_index, std::option::Option::Some(-1)));
     assert!(negative.is_err());
-    let oversized = super::convert_block_time(std::option::Option::Some(i64::MAX));
+    let oversized = super::canonical_transaction(&reference, fields(&transaction, &meta, &version, &transaction_index, std::option::Option::Some(i64::MAX)));
     assert!(oversized.is_err());
-    let absent = super::convert_block_time(std::option::Option::None);
-    assert!(matches!(absent, std::result::Result::Ok(std::option::Option::None)));
+    let absent = super::canonical_transaction(&reference, fields(&transaction, &meta, &version, &transaction_index, std::option::Option::None));
+    assert!(absent.is_ok());
+    if let std::result::Result::Ok(absent) = absent {
+        assert!(absent.block_time().is_none());
+    }
     return;
 }
 
@@ -242,6 +273,12 @@ fn pre_006_observation_key_is_deterministic_and_endpoint_specific() {
     let other_endpoint = super::observation_key(&request, &reference, "provider", "endpoint-b");
     let other_provider = super::observation_key(&request, &reference, "provider-2", "endpoint-a");
     assert_eq!(first, same);
+    assert_eq!(
+        first.as_bytes(),
+        &[
+            184, 85, 15, 15, 33, 101, 243, 112, 222, 145, 139, 212, 251, 14, 199, 130, 57, 26, 253, 221, 184, 140, 87, 240, 16, 116, 62, 0, 11, 19, 103, 2
+        ]
+    );
     assert_ne!(first, other_endpoint);
     assert_ne!(first, other_provider);
     return;
@@ -294,6 +331,15 @@ fn pre_006_missing_outcome_contains_only_network_scoped_reference() {
     return;
 }
 
+#[test]
+fn pre_003_backfill_uses_common_raw_v1_contract_without_changing_frozen_identity() {
+    assert_eq!(crate::RAW_TRANSACTION_FORMAT_ID, ksp_raw_transaction_lib::RAW_TRANSACTION_FORMAT_ID);
+    assert_eq!(crate::RAW_TRANSACTION_FORMAT_VERSION, ksp_raw_transaction_lib::RAW_TRANSACTION_FORMAT_VERSION);
+    assert_eq!(crate::MIN_BACKFILL_SIGNATURE_TEXT_BYTES, ksp_raw_transaction_lib::MIN_RAW_TRANSACTION_SIGNATURE_TEXT_BYTES);
+    assert_eq!(crate::MAX_BACKFILL_SIGNATURE_TEXT_BYTES, ksp_raw_transaction_lib::MAX_RAW_TRANSACTION_SIGNATURE_TEXT_BYTES);
+    return;
+}
+
 #[test]
 fn pre_006_fix_001_raw_acquisition_uses_one_private_indirection() {
     assert_eq!(std::mem::size_of::<crate::BackfillRawAcquisition>(), std::mem::size_of::<usize>(),);
diff --git a/deltas/0.3.10/pre.003.md b/deltas/0.3.10/pre.003.md
new file mode 100644
index 0000000..f89120c
--- /dev/null
+++ b/deltas/0.3.10/pre.003.md
@@ -0,0 +1,236 @@
+<!-- file: deltas/0.3.10/pre.003.md -->
+<!-- version: 1 -->
+
+# Delta `0.3.10-pre.003` — migration du Backfill vers la common RAW Transaction
+
+## Base requise
+
+```text
+0.3.10-pre.002-fix.001
+workspace.package.version = 0.3.10-pre.2.fix.1
+```
+
+Le gate opérateur communiqué le 2026-09-06 ferme intégralement la base : audits statiques propres, `cargo check --workspace` PASS, Clippy workspace `--all-targets --all-features -- -D warnings` PASS, `cargo test -p ksp-raw-transaction-lib` PASS avec 9 tests unitaires et 8 tests d’intégration, arbres normal/features conformes.
+
+## Objectif
+
+Migrer uniquement `ksp-job-backfill-lib` vers `ksp-raw-transaction-lib` sans modifier le comportement de campagne : common devient propriétaire du parser Base58, de RAW v1, du hash payload et de l’assemblage transaction/observation ; Backfill conserve Transport, provenance, observation key, Job scope et Store persistence.
+
+Aucun Worker, aucune nouvelle source Transport et aucune extension du format RAW ne sont introduits.
+
+## Version
+
+```text
+workspace.package.version = 0.3.10-pre.3
+```
+
+Le header du `Cargo.toml` racine passe de `492` à `493`. Le nombre de membres workspace reste `20`.
+
+## Migration de dépendance
+
+`ksp-job-backfill-lib` ajoute :
+
+```text
+ksp-raw-transaction-lib = { path = "../ksp-raw-transaction-lib" }
+```
+
+Le reste de son graphe runtime est conservé. `serde_json` reste nécessaire au type Transport `SolanaWireField<serde_json::Value>`. `sha2` reste nécessaire aux fingerprints et à la `RawObservationKey` Backfill ; il n’est plus utilisé pour le hash du payload RAW.
+
+## Chemin RAW après migration
+
+```text
+BackfillSignature
+    -> parse_raw_transaction_signature
+    -> RawTransactionSignature
+
+getTransaction observed
+    -> adapter SolanaEncodedTransaction/SolanaWireField
+    -> RawTransactionMaterial::binary_base64
+    -> canonicalize_raw_transaction
+    -> RawTransaction
+
+Backfill provenance + Backfill RawObservationKey
+    -> assemble_raw_transaction_acquisition
+    -> BackfillRawAcquisition
+    -> Store persistence existante
+```
+
+Les erreurs du parser/canonicalizer common sont remappées au boundary Backfill vers :
+
+```text
+ERROR_CODE_BACKFILL_RAW_CONVERSION_INVALID
+```
+
+Le Job ne change donc pas de domaine d’erreur externe par effet de la migration.
+
+## Code privé supprimé du Backfill
+
+La migration retire de `conversion.rs` les implémentations locales de :
+
+```text
+base58_digit(...)
+algorithme de décodage Base58 64-byte
+convert_block_time(...)
+canonical_payload_bytes(...)
+append_wire_value(...)
+append_canonical_json(...)
+append_json_string(...)
+RawPayload::try_new + SHA-256 du payload
+construction directe RawTransactionObservation
+```
+
+`CanonicalTransactionFields` reste un adapter Transport privé ; il ne définit aucun format RAW.
+
+## Propriété Backfill conservée
+
+Le Backfill continue de posséder :
+
+```text
+getTransaction observed / rôle HTTP
+provider gagnant
+endpoint gagnant
+commitment
+job_id
+scope_fingerprint
+RawAcquisitionOrigin::Backfill
+capture_session
+observation contract version = 1
+algorithme RawObservationKey Backfill
+persistence Store
+sémantique Missing
+```
+
+La common crate ne reçoit donc aucun vocabulaire de campagne.
+
+## Parité déterministe
+
+Le golden historique reste inchangé :
+
+```text
+format_id = ksp.solana.raw_transaction
+format_version = 1
+bytes = {"transaction":["AQID","base64"],"meta":{"a":{"x":null,"y":true},"z":1},"version":"legacy","transactionIndex":7}
+byte_len = 112
+sha256 = 220792d2b15d262fda242cb220774ee9ddeffebf04dcfadabcf8ef76a9b1a7c3
+```
+
+La provenance historique reste :
+
+```text
+provider = publicnode
+protocol = solana.http.json_rpc
+method = getTransaction
+endpoint = devnet-primary
+commitment = finalized
+capture_session = backfill:pre006
+origin = Backfill
+```
+
+Le canari d’observation key est désormais exact :
+
+```text
+provider = provider
+endpoint = endpoint-a
+key = b8550f0f2165f370de918bd4fb0ec782391afdddb88c57f010743e000b136702
+```
+
+## Canaris mis à jour
+
+```text
+BackfillSignature délègue au parser common
+bornes Backfill == bornes common
+format id/version Backfill == common
+wire omitted/null reste distinct via common
+non-Base64 reste rejeté avec error code Backfill
+block_time invalide reste terminal avec error code Backfill
+golden bytes/hash/provenance inchangés
+observation key exacte inchangée
+manifest Backfill exige l’edge common
+conversion.rs exige parser + canonicalizer + assembler common
+conversion.rs interdit canonical JSON/Base58/RawPayload privés
+lower-layer common interdit toute dépendance retour vers Job
+```
+
+## Fichiers ajoutés
+
+```text
+deltas/0.3.10/pre.003.md
+```
+
+## Fichiers modifiés
+
+```text
+Cargo.toml
+crates/ksp-job-backfill-lib/Cargo.toml
+crates/ksp-job-backfill-lib/README.md
+crates/ksp-job-backfill-lib/src/conversion.rs
+crates/ksp-job-backfill-lib/src/lib.rs
+crates/ksp-job-backfill-lib/src/request.rs
+crates/ksp-job-backfill-lib/tests/dependency_boundary.rs
+crates/ksp-job-backfill-lib/tests/hardening.rs
+crates/ksp-job-backfill-lib/unit_tests/conversion.rs
+docs/plans/031-V0_3_10_RAW_TRANSACTION_INGEST_PLAN.md
+docs/validation/027-V0_3_10_RAW_TRANSACTION_INGEST.md
+```
+
+## Fichiers supprimés
+
+Aucun.
+
+## Validations exécutées dans l’environnement d’assemblage
+
+```text
+python3 scripts/audit_rust_workspace_rules.py
+General Rust rule audit: clean
+Rust export completeness audit: 0 candidate(s)
+KSP workspace Rust rule audit: clean
+
+python3 scripts/audit_markdown_tables.py README.md RULES.md ROADMAP.md CHANGELOG.md docs prompts crates deltas
+Markdown table audit: clean (339 table(s), 756 file(s))
+```
+
+L’environnement d’assemblage ne fournit ni `cargo`, ni `rustc`, ni `rustfmt`.
+
+## Gate opérateur demandé
+
+```bash
+cargo fmt --all
+python3 scripts/audit_rust_workspace_rules.py
+python3 scripts/audit_markdown_tables.py README.md RULES.md ROADMAP.md CHANGELOG.md docs prompts crates deltas
+cargo check --workspace
+cargo clippy --workspace --all-targets --all-features -- -D warnings
+cargo test -p ksp-raw-transaction-lib
+cargo test -p ksp-job-backfill-lib
+cargo tree -p ksp-job-backfill-lib --edges normal
+cargo tree -p ksp-job-backfill-lib -e features
+```
+
+## Validations non exécutées localement
+
+```text
+cargo fmt --all
+cargo check --workspace
+cargo clippy --workspace --all-targets --all-features -- -D warnings
+cargo test -p ksp-raw-transaction-lib
+cargo test -p ksp-job-backfill-lib
+cargo tree -p ksp-job-backfill-lib --edges normal
+cargo tree -p ksp-job-backfill-lib -e features
+smokes live : non pertinents pour cette tranche de migration déterministe
+```
+
+## Décisions prises
+
+```text
+common possède parser + canonical RAW v1 + payload hash + assembly
+Backfill conserve observation key/provenance/campagne
+les erreurs common sont remappées vers le code Backfill historique
+les constantes publiques RAW du Backfill sont des reexports common
+les bornes publiques de signature Backfill suivent les constantes common
+aucun changement du Store persistence path
+aucun changement de source/acquisition réseau
+aucun Worker avant la tranche planifiée
+```
+
+## Questions ouvertes
+
+Aucune question ne bloque le gate de `pre.003`. `pre.004` reste strictement dédiée à `get_block_observed` et au matériau HTTP block après validation opérateur complète de cette migration.
diff --git a/docs/plans/031-V0_3_10_RAW_TRANSACTION_INGEST_PLAN.md b/docs/plans/031-V0_3_10_RAW_TRANSACTION_INGEST_PLAN.md
index bed5e5e..8318957 100644
--- a/docs/plans/031-V0_3_10_RAW_TRANSACTION_INGEST_PLAN.md
+++ b/docs/plans/031-V0_3_10_RAW_TRANSACTION_INGEST_PLAN.md
@@ -1,5 +1,5 @@
 <!-- file: docs/plans/031-V0_3_10_RAW_TRANSACTION_INGEST_PLAN.md -->
-<!-- version: 3 -->
+<!-- version: 4 -->
 
 # Plan v0.3.10 — RAW Transaction commune + Worker d’ingestion multi-source
 
@@ -1040,11 +1040,15 @@ Présente tranche : archive/règles, common extraction, capability matrix, fraî
 
 La matérialisation a révélé une correction normative du sizing `pre.001` : `DEP-PIPE-006` impose `ksp-store-api` au pipeline RAW et interdit `ksp-store-lib`. Le graphe et la section 5.4 sont donc corrigés dans cette tranche sans changer le contrat fonctionnel RAW.
 
-La validation opérateur du 2026-09-06 confirme `cargo check --workspace`, les audits statiques et les tests de la crate, mais révèle un échec du gate Clippy `-D warnings` limité aux tests d’intégration : quatre crates de test sans rustdoc de crate et un `clippy::collapsible_if`. `pre.002-fix.001` corrige uniquement ces canaris, sans modifier le contrat RAW ni commencer `pre.003`; le signal Cargo devient `0.3.10-pre.2.fix.1`.
+La validation opérateur du 2026-09-06 a d’abord révélé un échec Clippy limité aux tests d’intégration. `pre.002-fix.001` a corrigé ces canaris sans toucher au contrat RAW. Le rejeu opérateur suivant est intégralement vert : audits, `cargo check --workspace`, Clippy `--all-targets --all-features -- -D warnings`, tests de `ksp-raw-transaction-lib`, arbre normal et arbre de features. La fondation common est donc fermée.
 
 ### `pre.003` — migration Backfill vers common
 
-Remplacer la canonicalisation privée du Backfill par common, conserver son observation key/provenance/campagne et prouver zéro changement bytes/hash/comportement de campagne.
+**Statut : réalisé.**
+
+La canonicalisation privée du Backfill est supprimée au profit de `ksp-raw-transaction-lib`. Le Job conserve uniquement l’adaptation Transport vers `RawTransactionMaterial`, le remapping de ses erreurs publiques, la provenance/campagne et sa `RawObservationKey` producer-owned. Le parser Base58 common, `canonicalize_raw_transaction(...)` et `assemble_raw_transaction_acquisition(...)` sont désormais les chemins uniques pour la signature, RAW v1 et l’assemblage.
+
+Les invariants historiques restent gelés : `ksp.solana.raw_transaction` v1, golden `112` octets, SHA-256 `220792d2b15d262fda242cb220774ee9ddeffebf04dcfadabcf8ef76a9b1a7c3`, origin `Backfill`, provider/endpoint/commitment/capture-session, observation key de campagne et sémantique `Missing`. Les erreurs common sont remappées sur `ERROR_CODE_BACKFILL_RAW_CONVERSION_INVALID` afin de ne pas modifier le contrat externe du Job.
 
 ### `pre.004` — HTTP observed block + block material
 
diff --git a/docs/validation/027-V0_3_10_RAW_TRANSACTION_INGEST.md b/docs/validation/027-V0_3_10_RAW_TRANSACTION_INGEST.md
index 3f8ba80..247bda1 100644
--- a/docs/validation/027-V0_3_10_RAW_TRANSACTION_INGEST.md
+++ b/docs/validation/027-V0_3_10_RAW_TRANSACTION_INGEST.md
@@ -1,5 +1,5 @@
 <!-- file: docs/validation/027-V0_3_10_RAW_TRANSACTION_INGEST.md -->
-<!-- version: 3 -->
+<!-- version: 4 -->
 
 # Validation v0.3.10 — RAW Transaction commune + Worker d’ingestion
 
@@ -513,3 +513,151 @@ workspace.package.version = 0.3.10-pre.2.fix.1
 
 Le gate Clippy complet doit être rejoué après application du fix avant ouverture de `pre.003`.
 
+## 12. `pre.002-fix.001` fermé et `pre.003` — migration Backfill vers common
+
+### 12.1 Fermeture opérateur de `pre.002-fix.001`
+
+Le rejeu communiqué le 2026-09-06 ferme le fix précédent :
+
+```text
+cargo fmt --all : exécuté
+General Rust rule audit: clean
+Rust export completeness audit: 0 candidate(s)
+KSP workspace Rust rule audit: clean
+Markdown table audit: clean (339 table(s), 755 file(s))
+cargo check --workspace : PASS
+cargo clippy --workspace --all-targets --all-features -- -D warnings : PASS
+cargo test -p ksp-raw-transaction-lib : PASS
+```
+
+Détail des tests common communiqué :
+
+```text
+9 unitaires : PASS
+8 intégration : PASS
+0 échec
+0 doctest
+```
+
+L’arbre normal confirme uniquement `ksp-core-lib`, `ksp-store-api`, `serde_json` et `sha2` côté common. L’arbre de features ne révèle aucune feature KSP/runtime inattendue. `pre.003` peut donc être ouverte.
+
+### 12.2 Migration réalisée dans `pre.003`
+
+`ksp-job-backfill-lib` dépend désormais explicitement de `ksp-raw-transaction-lib`. La conversion Backfill ne possède plus :
+
+```text
+algorithme Base58 64-byte
+canonical JSON récursif
+construction RawPayload
+SHA-256 du payload RAW
+conversion block_time RAW
+assemblage direct RawTransaction + RawTransactionObservation
+```
+
+Le chemin productif devient :
+
+```text
+BackfillSignature
+    -> ksp-raw-transaction-lib::parse_raw_transaction_signature
+
+SolanaConfirmedTransaction
+    -> adapter Transport local
+    -> RawTransactionMaterial::binary_base64
+    -> ksp-raw-transaction-lib::canonicalize_raw_transaction
+
+Backfill provenance + Backfill observation key
+    -> ksp-raw-transaction-lib::assemble_raw_transaction_acquisition
+    -> Store facade
+```
+
+Le Backfill conserve volontairement :
+
+```text
+getTransaction observed + rôle HTTP
+commitment/campagne/job_id/scope_fingerprint
+provider + endpoint réel gagnant
+RawAcquisitionOrigin::Backfill
+capture_session = JobId
+algorithme de RawObservationKey Backfill v1
+remapping des erreurs common vers ERROR_CODE_BACKFILL_RAW_CONVERSION_INVALID
+persistence Store et sémantique Missing
+```
+
+### 12.3 Parité gelée
+
+Les canaris Backfill continuent d’exiger :
+
+```text
+RAW_TRANSACTION_FORMAT_ID = ksp.solana.raw_transaction
+RAW_TRANSACTION_FORMAT_VERSION = 1
+byte_len golden = 112
+sha256 golden = 220792d2b15d262fda242cb220774ee9ddeffebf04dcfadabcf8ef76a9b1a7c3
+block_time golden = 1700000000000 ms
+network = devnet
+signature = 64 octets zéro pour le vecteur de référence
+provider = publicnode
+protocol = solana.http.json_rpc
+method = getTransaction
+endpoint = devnet-primary
+commitment = finalized
+capture_session = backfill:pre006
+```
+
+L’observation key Backfill du vecteur `provider` / `endpoint-a` est désormais verrouillée byte-for-byte :
+
+```text
+b8550f0f2165f370de918bd4fb0ec782391afdddb88c57f010743e000b136702
+```
+
+Ce canari prouve que la migration common ne déplace pas l’idempotence producer-owned vers la lower layer.
+
+### 12.4 Frontières de dépendances
+
+Le graphe Backfill attendu devient :
+
+```text
+ksp-job-backfill-lib
+    -> ksp-core-lib
+    -> ksp-job-api
+    -> ksp-logging-lib
+    -> ksp-onchain-transport-lib
+    -> ksp-raw-transaction-lib
+    -> ksp-store-lib default-features=false
+    -> futures-util
+    -> serde_json
+    -> sha2
+    -> tokio macros+sync
+```
+
+`serde_json` reste un type direct de l’adapter Transport (`SolanaWireField<serde_json::Value>`), mais aucune canonicalisation JSON Backfill n’existe plus. `sha2` reste Job-owned pour scope fingerprint et observation key ; le hash du payload RAW appartient désormais uniquement à common.
+
+### 12.5 Validation locale d’assemblage `pre.003`
+
+Exécuté dans l’environnement d’assemblage :
+
+```text
+python3 scripts/audit_rust_workspace_rules.py
+General Rust rule audit: clean
+Rust export completeness audit: 0 candidate(s)
+KSP workspace Rust rule audit: clean
+
+python3 scripts/audit_markdown_tables.py README.md RULES.md ROADMAP.md CHANGELOG.md docs prompts crates deltas
+Markdown table audit: clean (339 table(s), 756 file(s))
+```
+
+L’environnement d’assemblage ne fournit toujours ni `cargo`, ni `rustc`, ni `rustfmt`. Les gates Cargo de `pre.003` restent donc à rejouer côté opérateur.
+
+### 12.6 Gate opérateur demandé pour `pre.003`
+
+```bash
+cargo fmt --all
+python3 scripts/audit_rust_workspace_rules.py
+python3 scripts/audit_markdown_tables.py README.md RULES.md ROADMAP.md CHANGELOG.md docs prompts crates deltas
+cargo check --workspace
+cargo clippy --workspace --all-targets --all-features -- -D warnings
+cargo test -p ksp-raw-transaction-lib
+cargo test -p ksp-job-backfill-lib
+cargo tree -p ksp-job-backfill-lib --edges normal
+cargo tree -p ksp-job-backfill-lib -e features
+```
+