diff --git a/Cargo.toml b/Cargo.toml
index 34af1c9..7b3aa88 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,12 +1,12 @@
 # file: Cargo.toml
-# version: 123
+# version: 124
 
 [workspace]
 resolver = "3"
 members = ["crates/ksp-app-config-desk", "crates/ksp-config-lib", "crates/ksp-core-lib", "crates/ksp-logging-lib", "crates/ksp-onchain-transport-lib"]
 
 [workspace.package]
-version = "0.2.3-pre.3"
+version = "0.2.3-pre.4"
 edition = "2024"
 license = "MIT"
 repository = "https://git.sasedev.com/Sasedev/khadhroony-solana-project"
diff --git a/crates/ksp-onchain-transport-lib/fixtures/http/get_recent_prioritization_fees.success.json b/crates/ksp-onchain-transport-lib/fixtures/http/get_recent_prioritization_fees.success.json
new file mode 100644
index 0000000..03a2a0a
--- /dev/null
+++ b/crates/ksp-onchain-transport-lib/fixtures/http/get_recent_prioritization_fees.success.json
@@ -0,0 +1 @@
+{"jsonrpc":"2.0","result":[{"slot":431000030,"prioritizationFee":1200},{"slot":431000029,"prioritizationFee":0}],"id":1}
diff --git a/crates/ksp-onchain-transport-lib/fixtures/http/get_signature_statuses.count_mismatch.json b/crates/ksp-onchain-transport-lib/fixtures/http/get_signature_statuses.count_mismatch.json
new file mode 100644
index 0000000..a1cfb12
--- /dev/null
+++ b/crates/ksp-onchain-transport-lib/fixtures/http/get_signature_statuses.count_mismatch.json
@@ -0,0 +1 @@
+{"jsonrpc":"2.0","result":{"context":{"apiVersion":"4.2.1","slot":431000052},"value":[null]},"id":1}
diff --git a/crates/ksp-onchain-transport-lib/fixtures/http/get_signature_statuses.empty.json b/crates/ksp-onchain-transport-lib/fixtures/http/get_signature_statuses.empty.json
new file mode 100644
index 0000000..4c1c3da
--- /dev/null
+++ b/crates/ksp-onchain-transport-lib/fixtures/http/get_signature_statuses.empty.json
@@ -0,0 +1 @@
+{"jsonrpc":"2.0","result":{"context":{"apiVersion":"4.2.1","slot":431000051},"value":[]},"id":1}
diff --git a/crates/ksp-onchain-transport-lib/fixtures/http/get_signature_statuses.max_256.json b/crates/ksp-onchain-transport-lib/fixtures/http/get_signature_statuses.max_256.json
new file mode 100644
index 0000000..1b0c93c
--- /dev/null
+++ b/crates/ksp-onchain-transport-lib/fixtures/http/get_signature_statuses.max_256.json
@@ -0,0 +1 @@
+{"jsonrpc":"2.0","result":{"context":{"apiVersion":"4.2.1","slot":431000053},"value":[null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null]},"id":1}
diff --git a/crates/ksp-onchain-transport-lib/fixtures/http/get_signature_statuses.success.json b/crates/ksp-onchain-transport-lib/fixtures/http/get_signature_statuses.success.json
new file mode 100644
index 0000000..9024d10
--- /dev/null
+++ b/crates/ksp-onchain-transport-lib/fixtures/http/get_signature_statuses.success.json
@@ -0,0 +1 @@
+{"jsonrpc":"2.0","result":{"context":{"apiVersion":"4.2.1","slot":431000050},"value":[null,{"slot":431000049,"confirmations":null,"status":{"Ok":null},"err":null,"confirmationStatus":"finalized"},{"slot":431000048,"confirmations":2,"status":{"Err":{"InstructionError":[0,"Custom"]}},"err":{"InstructionError":[0,"Custom"]},"confirmationStatus":"confirmed"}]},"id":1}
diff --git a/crates/ksp-onchain-transport-lib/fixtures/http/get_signatures_for_address.error.json b/crates/ksp-onchain-transport-lib/fixtures/http/get_signatures_for_address.error.json
new file mode 100644
index 0000000..3ef84bf
--- /dev/null
+++ b/crates/ksp-onchain-transport-lib/fixtures/http/get_signatures_for_address.error.json
@@ -0,0 +1 @@
+{"jsonrpc":"2.0","error":{"code":-32015,"message":"Transaction history is not available from this node"},"id":1}
diff --git a/crates/ksp-onchain-transport-lib/fixtures/http/get_signatures_for_address.success.json b/crates/ksp-onchain-transport-lib/fixtures/http/get_signatures_for_address.success.json
new file mode 100644
index 0000000..ad44f32
--- /dev/null
+++ b/crates/ksp-onchain-transport-lib/fixtures/http/get_signatures_for_address.success.json
@@ -0,0 +1 @@
+{"jsonrpc":"2.0","result":[{"signature":"newest-signature","slot":431000040,"err":null,"memo":"memo-newest","blockTime":1787000100,"confirmationStatus":"finalized","transactionIndex":9},{"signature":"older-signature","slot":431000039,"err":{"InstructionError":[0,"Custom"]},"memo":null,"blockTime":null,"confirmationStatus":"confirmed"}],"id":1}
diff --git a/crates/ksp-onchain-transport-lib/src/lib.rs b/crates/ksp-onchain-transport-lib/src/lib.rs
index 49e7e83..0d2ddb3 100644
--- a/crates/ksp-onchain-transport-lib/src/lib.rs
+++ b/crates/ksp-onchain-transport-lib/src/lib.rs
@@ -1,5 +1,5 @@
 // file: crates/ksp-onchain-transport-lib/src/lib.rs
-// version: 13
+// version: 14
 #![warn(missing_docs)]
 #![deny(unreachable_pub)]
 #![forbid(unsafe_code)]
@@ -10,9 +10,10 @@
 //! independent from `ksp-config-lib`, Store and Program layers. `ksp-config-lib` now constructs these public settings through its one-way Config ->
 //! Transport adapter without creating a reverse dependency. Logical endpoint clients, priority-aware pools, bounded admission limits and retry/no-resend policy
 //! are available. The four typed Solana HTTP foundation canaries plus all 22 typed `0.2.2` Accounts, Tokens and Cluster wrappers execute real JSON-RPC
-//! requests through the shared transport path. `0.2.3` exposes its shared Transaction wire/config primitives and its first four read wrappers:
-//! `getFeeForMessage`, `getLatestBlockhash`, `getTransactionCount` and `isBlockhashValid`. The remaining seven Transaction wrappers and the `0.2.4` family
-//! remain staged.
+//! requests through the shared transport path. `0.2.3` exposes its shared Transaction wire/config primitives and seven read wrappers through `pre.004`,
+//! including bounded prioritization-fee, address-signature and signature-status queries. `getTransaction`, both write submissions and
+//! `simulateTransaction`, plus the
+//! `0.2.4` family remain staged.
 
 mod client;
 mod constants;
diff --git a/crates/ksp-onchain-transport-lib/src/rpc_transactions.rs b/crates/ksp-onchain-transport-lib/src/rpc_transactions.rs
index 4215e6f..3b91a86 100644
--- a/crates/ksp-onchain-transport-lib/src/rpc_transactions.rs
+++ b/crates/ksp-onchain-transport-lib/src/rpc_transactions.rs
@@ -1,5 +1,5 @@
 // file: crates/ksp-onchain-transport-lib/src/rpc_transactions.rs
-// version: 3
+// version: 4
 
 /// Binary encoding accepted for serialized transaction input payloads.
 #[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
@@ -236,14 +236,12 @@ impl SolanaSignaturesForAddressConfig {
     }
 
     /// Returns whether the pagination config would serialize to an empty object.
-    #[cfg(test)]
     pub(crate) fn is_empty(&self) -> bool {
         return self.before.is_none() && self.until.is_none() && self.limit.is_none() && self.commitment().is_none() && self.min_context_slot().is_none();
     }
 
     /// Serializes this pagination config to the Solana JSON-RPC wire object.
     #[must_use]
-    #[cfg(test)]
     pub(crate) fn to_json_value(&self) -> serde_json::Value {
         let context = self.context.to_json_value();
         let mut object = match context {
@@ -283,14 +281,12 @@ impl SolanaSignatureStatusesConfig {
     }
 
     /// Returns whether the status config would serialize to an empty object.
-    #[cfg(test)]
     pub(crate) const fn is_empty(&self) -> bool {
         return self.search_transaction_history.is_none();
     }
 
     /// Serializes this config to the Solana JSON-RPC wire object.
     #[must_use]
-    #[cfg(test)]
     pub(crate) fn to_json_value(self) -> serde_json::Value {
         let mut object = serde_json::Map::new();
         if let std::option::Option::Some(value) = self.search_transaction_history {
@@ -651,7 +647,6 @@ impl SolanaPrioritizationFee {
     }
 
     /// Decodes one prioritization-fee sample from the Solana JSON wire shape.
-    #[cfg(test)]
     pub(crate) fn decode_wire(method: &str, value: serde_json::Value) -> ksp_core_lib::Result<Self> {
         let decoded = crate::decode_wire_json::<WirePrioritizationFee>(method, value);
         return match decoded {
@@ -728,7 +723,6 @@ impl SolanaSignatureInfo {
     }
 
     /// Decodes one signature record from the Solana JSON wire shape.
-    #[cfg(test)]
     pub(crate) fn decode_wire(method: &str, value: serde_json::Value) -> ksp_core_lib::Result<Self> {
         let decoded = crate::decode_wire_json::<WireSignatureInfo>(method, value);
         let wire = match decoded {
@@ -794,7 +788,6 @@ impl SolanaSignatureStatus {
     }
 
     /// Decodes one present signature status from the Solana JSON wire shape.
-    #[cfg(test)]
     pub(crate) fn decode_wire(method: &str, value: serde_json::Value) -> ksp_core_lib::Result<Self> {
         let decoded = crate::decode_wire_json::<WireSignatureStatus>(method, value);
         let wire = match decoded {
@@ -1102,6 +1095,10 @@ impl SolanaSimulateTransactionResult {
     }
 }
 
+const MAX_RECENT_PRIORITIZATION_FEE_ACCOUNTS: usize = 128;
+const MAX_SIGNATURES_FOR_ADDRESS_LIMIT: usize = 1_000;
+const MAX_SIGNATURE_STATUSES: usize = 256;
+
 impl crate::HttpTransportPool {
     /// Executes typed `getFeeForMessage` through the common KSP HTTP transport path.
     pub async fn get_fee_for_message(
@@ -1154,6 +1151,106 @@ impl crate::HttpTransportPool {
         };
     }
 
+    /// Executes typed `getRecentPrioritizationFees` through the common KSP HTTP transport path.
+    pub async fn get_recent_prioritization_fees(
+        &self,
+        role: &crate::HttpRoleName,
+        writable_accounts: std::option::Option<&[ksp_core_lib::Pubkey]>,
+    ) -> ksp_core_lib::Result<std::vec::Vec<crate::SolanaPrioritizationFee>> {
+        if let std::option::Option::Some(writable_accounts) = writable_accounts
+            && writable_accounts.len() > MAX_RECENT_PRIORITIZATION_FEE_ACCOUNTS
+        {
+            return invalid_transaction_parameters(
+                "getRecentPrioritizationFees",
+                "getRecentPrioritizationFees accepts at most 128 account addresses",
+                "account_count",
+                writable_accounts.len(),
+            );
+        }
+        let mut params = std::vec::Vec::new();
+        if let std::option::Option::Some(writable_accounts) = writable_accounts {
+            let mut addresses = std::vec::Vec::with_capacity(writable_accounts.len());
+            for account in writable_accounts {
+                addresses.push(serde_json::Value::String(account.to_string()));
+            }
+            params.push(serde_json::Value::Array(addresses));
+        }
+        let value = self.execute_transaction_rpc("getRecentPrioritizationFees", role, params).await;
+        let value = match value {
+            std::result::Result::Ok(value) => value,
+            std::result::Result::Err(error) => return std::result::Result::Err(error),
+        };
+        return decode_prioritization_fees("getRecentPrioritizationFees", value);
+    }
+
+    /// Executes typed `getSignaturesForAddress` through the common KSP HTTP transport path.
+    pub async fn get_signatures_for_address(
+        &self,
+        role: &crate::HttpRoleName,
+        address: &ksp_core_lib::Pubkey,
+        config: std::option::Option<&crate::SolanaSignaturesForAddressConfig>,
+    ) -> ksp_core_lib::Result<std::vec::Vec<crate::SolanaSignatureInfo>> {
+        if let std::option::Option::Some(limit) = config.and_then(crate::SolanaSignaturesForAddressConfig::limit)
+            && (limit == 0 || limit > MAX_SIGNATURES_FOR_ADDRESS_LIMIT)
+        {
+            return invalid_transaction_parameters("getSignaturesForAddress", "getSignaturesForAddress limit must be between 1 and 1000", "limit", limit);
+        }
+        let mut params = std::vec![serde_json::Value::String(address.to_string())];
+        if let std::option::Option::Some(config) = config
+            && !config.is_empty()
+        {
+            params.push(config.to_json_value());
+        }
+        let value = self.execute_transaction_rpc("getSignaturesForAddress", role, params).await;
+        let value = match value {
+            std::result::Result::Ok(value) => value,
+            std::result::Result::Err(error) => return std::result::Result::Err(error),
+        };
+        return decode_signature_infos("getSignaturesForAddress", value);
+    }
+
+    /// Executes typed `getSignatureStatuses` through the common KSP HTTP transport path.
+    pub async fn get_signature_statuses(
+        &self,
+        role: &crate::HttpRoleName,
+        signatures: &[std::string::String],
+        config: std::option::Option<&crate::SolanaSignatureStatusesConfig>,
+    ) -> ksp_core_lib::Result<crate::SolanaRpcResponse<std::vec::Vec<std::option::Option<crate::SolanaSignatureStatus>>>> {
+        if signatures.len() > MAX_SIGNATURE_STATUSES {
+            return invalid_transaction_parameters(
+                "getSignatureStatuses",
+                "getSignatureStatuses accepts at most 256 signatures",
+                "signature_count",
+                signatures.len(),
+            );
+        }
+        let mut signature_values = std::vec::Vec::with_capacity(signatures.len());
+        for signature in signatures {
+            signature_values.push(serde_json::Value::String(signature.clone()));
+        }
+        let mut params = std::vec![serde_json::Value::Array(signature_values)];
+        if let std::option::Option::Some(config) = config
+            && !config.is_empty()
+        {
+            params.push((*config).to_json_value());
+        }
+        let value = self.execute_transaction_rpc("getSignatureStatuses", role, params).await;
+        let value = match value {
+            std::result::Result::Ok(value) => value,
+            std::result::Result::Err(error) => return std::result::Result::Err(error),
+        };
+        let contextual = decode_transaction_contextual_wire("getSignatureStatuses", value);
+        let (context, value) = match contextual {
+            std::result::Result::Ok(contextual) => contextual,
+            std::result::Result::Err(error) => return std::result::Result::Err(error),
+        };
+        let statuses = decode_signature_statuses("getSignatureStatuses", value, signatures.len());
+        return match statuses {
+            std::result::Result::Ok(statuses) => std::result::Result::Ok(crate::SolanaRpcResponse::new(context, statuses)),
+            std::result::Result::Err(error) => std::result::Result::Err(error),
+        };
+    }
+
     /// Executes typed `getTransactionCount` through the common KSP HTTP transport path.
     pub async fn get_transaction_count(
         &self,
@@ -1232,6 +1329,84 @@ fn decode_transaction_contextual_wire(method: &str, value: serde_json::Value) ->
     };
 }
 
+fn decode_prioritization_fees(method: &str, value: serde_json::Value) -> ksp_core_lib::Result<std::vec::Vec<crate::SolanaPrioritizationFee>> {
+    let decoded = crate::decode_wire_json::<std::vec::Vec<serde_json::Value>>(method, value);
+    let values = match decoded {
+        std::result::Result::Ok(values) => values,
+        std::result::Result::Err(error) => return std::result::Result::Err(error),
+    };
+    let mut fees = std::vec::Vec::with_capacity(values.len());
+    for value in values {
+        let fee = crate::SolanaPrioritizationFee::decode_wire(method, value);
+        match fee {
+            std::result::Result::Ok(fee) => fees.push(fee),
+            std::result::Result::Err(error) => return std::result::Result::Err(error),
+        }
+    }
+    return std::result::Result::Ok(fees);
+}
+
+fn decode_signature_infos(method: &str, value: serde_json::Value) -> ksp_core_lib::Result<std::vec::Vec<crate::SolanaSignatureInfo>> {
+    let decoded = crate::decode_wire_json::<std::vec::Vec<serde_json::Value>>(method, value);
+    let values = match decoded {
+        std::result::Result::Ok(values) => values,
+        std::result::Result::Err(error) => return std::result::Result::Err(error),
+    };
+    let mut infos = std::vec::Vec::with_capacity(values.len());
+    for value in values {
+        let info = crate::SolanaSignatureInfo::decode_wire(method, value);
+        match info {
+            std::result::Result::Ok(info) => infos.push(info),
+            std::result::Result::Err(error) => return std::result::Result::Err(error),
+        }
+    }
+    return std::result::Result::Ok(infos);
+}
+
+fn decode_signature_statuses(
+    method: &str,
+    value: serde_json::Value,
+    expected_count: usize,
+) -> ksp_core_lib::Result<std::vec::Vec<std::option::Option<crate::SolanaSignatureStatus>>> {
+    let decoded = crate::decode_wire_json::<std::vec::Vec<std::option::Option<serde_json::Value>>>(method, value);
+    let values = match decoded {
+        std::result::Result::Ok(values) => values,
+        std::result::Result::Err(error) => return std::result::Result::Err(error),
+    };
+    if values.len() != expected_count {
+        return std::result::Result::Err(
+            ksp_core_lib::Error::new(crate::ERROR_CODE_INVALID_RESPONSE, "getSignatureStatuses result count does not match the requested signature count")
+                .with_context("rpc_method", method)
+                .with_context("expected_count", expected_count.to_string())
+                .with_context("actual_count", values.len().to_string()),
+        );
+    }
+    let mut statuses = std::vec::Vec::with_capacity(values.len());
+    for value in values {
+        let value = match value {
+            std::option::Option::Some(value) => value,
+            std::option::Option::None => {
+                statuses.push(std::option::Option::None);
+                continue;
+            },
+        };
+        let status = crate::SolanaSignatureStatus::decode_wire(method, value);
+        match status {
+            std::result::Result::Ok(status) => statuses.push(std::option::Option::Some(status)),
+            std::result::Result::Err(error) => return std::result::Result::Err(error),
+        }
+    }
+    return std::result::Result::Ok(statuses);
+}
+
+fn invalid_transaction_parameters<T>(method: &str, message: &str, field: &'static str, value: usize) -> ksp_core_lib::Result<T> {
+    return std::result::Result::Err(
+        ksp_core_lib::Error::new(crate::ERROR_CODE_INVALID_RPC_PARAMETERS, message)
+            .with_context("rpc_method", method)
+            .with_context(field, value.to_string()),
+    );
+}
+
 fn transaction_descriptor(method: &str) -> ksp_core_lib::Result<&'static crate::HttpRpcMethodDescriptor> {
     let descriptor = crate::find_http_rpc_method(method);
     return match descriptor {
@@ -1257,7 +1432,6 @@ fn invalid_transaction_wire(method: &str, field: &str, message: &'static str) ->
     return ksp_core_lib::Error::new(crate::ERROR_CODE_INVALID_RESPONSE, message).with_context("rpc_method", method).with_context("field", field);
 }
 
-#[cfg(test)]
 fn decode_confirmation_status(
     method: &str,
     field: &str,
@@ -1386,7 +1560,6 @@ struct WireLatestBlockhash {
     last_valid_block_height: u64,
 }
 
-#[cfg(test)]
 #[derive(serde::Deserialize)]
 #[serde(rename_all = "camelCase")]
 struct WirePrioritizationFee {
@@ -1394,7 +1567,6 @@ struct WirePrioritizationFee {
     prioritization_fee: u64,
 }
 
-#[cfg(test)]
 #[derive(serde::Deserialize)]
 #[serde(rename_all = "camelCase")]
 struct WireSignatureInfo {
@@ -1412,7 +1584,6 @@ struct WireSignatureInfo {
     transaction_index: std::option::Option<u32>,
 }
 
-#[cfg(test)]
 #[derive(serde::Deserialize)]
 #[serde(rename_all = "camelCase")]
 struct WireSignatureStatus {
diff --git a/crates/ksp-onchain-transport-lib/tests/public_api.rs b/crates/ksp-onchain-transport-lib/tests/public_api.rs
index a98e223..16c3260 100644
--- a/crates/ksp-onchain-transport-lib/tests/public_api.rs
+++ b/crates/ksp-onchain-transport-lib/tests/public_api.rs
@@ -1,5 +1,5 @@
 // file: crates/ksp-onchain-transport-lib/tests/public_api.rs
-// version: 11
+// version: 12
 
 //! Integration tests for the public `ksp-onchain-transport-lib` consumer contract.
 
@@ -278,3 +278,10 @@ fn public_transaction_pre_003_read_wrappers_are_available_from_crate_root() {
     let _get_transaction_count = ksp_onchain_transport_lib::HttpTransportPool::get_transaction_count;
     let _is_blockhash_valid = ksp_onchain_transport_lib::HttpTransportPool::is_blockhash_valid;
 }
+
+#[test]
+fn public_transaction_pre_004_additional_read_wrappers_are_available_from_crate_root() {
+    let _get_recent_prioritization_fees = ksp_onchain_transport_lib::HttpTransportPool::get_recent_prioritization_fees;
+    let _get_signatures_for_address = ksp_onchain_transport_lib::HttpTransportPool::get_signatures_for_address;
+    let _get_signature_statuses = ksp_onchain_transport_lib::HttpTransportPool::get_signature_statuses;
+}
diff --git a/crates/ksp-onchain-transport-lib/tests/release_completeness.rs b/crates/ksp-onchain-transport-lib/tests/release_completeness.rs
index d4e6404..141e1f8 100644
--- a/crates/ksp-onchain-transport-lib/tests/release_completeness.rs
+++ b/crates/ksp-onchain-transport-lib/tests/release_completeness.rs
@@ -1,5 +1,5 @@
 // file: crates/ksp-onchain-transport-lib/tests/release_completeness.rs
-// version: 8
+// version: 9
 
 //! Release-level completeness canaries for the `0.2.1` HTTP foundation contract.
 
@@ -259,3 +259,35 @@ fn release_pre_003_transaction_read_subset_is_exact_and_retry_safe() {
     assert_eq!(actual, expected);
     assert_eq!(actual.len(), 4);
 }
+
+#[test]
+fn release_pre_004_transaction_read_subset_is_exact_and_retry_safe() {
+    let mut expected = std::vec![
+        "getFeeForMessage",
+        "getLatestBlockhash",
+        "getRecentPrioritizationFees",
+        "getSignaturesForAddress",
+        "getSignatureStatuses",
+        "getTransactionCount",
+        "isBlockhashValid",
+    ];
+    let deferred = std::vec!["getTransaction", "requestAirdrop", "sendTransaction", "simulateTransaction"];
+    let mut actual = std::vec::Vec::new();
+    for method_name in &expected {
+        let descriptor = ksp_onchain_transport_lib::find_http_rpc_method(method_name).expect("pre.004 Transaction descriptor must exist");
+        actual.push(descriptor.method());
+        assert_eq!(descriptor.category(), ksp_onchain_transport_lib::HttpRpcCategory::Transactions);
+        assert_eq!(descriptor.coverage_release(), ksp_onchain_transport_lib::HttpRpcCoverageRelease::V0_2_3);
+        assert_eq!(descriptor.operation_kind(), ksp_onchain_transport_lib::RpcOperationKind::Read);
+        assert_eq!(descriptor.transport_retry_class(), ksp_onchain_transport_lib::TransportRetryClass::RetrySafe);
+    }
+    for method_name in &deferred {
+        let descriptor = ksp_onchain_transport_lib::find_http_rpc_method(method_name).expect("deferred Transaction descriptor must remain registered");
+        assert_eq!(descriptor.coverage_release(), ksp_onchain_transport_lib::HttpRpcCoverageRelease::V0_2_3);
+    }
+    actual.sort_unstable();
+    expected.sort_unstable();
+    assert_eq!(actual, expected);
+    assert_eq!(actual.len(), 7);
+    assert_eq!(deferred.len(), 4);
+}
diff --git a/crates/ksp-onchain-transport-lib/unit_tests/rpc_transactions.rs b/crates/ksp-onchain-transport-lib/unit_tests/rpc_transactions.rs
index 6d5d474..8362599 100644
--- a/crates/ksp-onchain-transport-lib/unit_tests/rpc_transactions.rs
+++ b/crates/ksp-onchain-transport-lib/unit_tests/rpc_transactions.rs
@@ -1,5 +1,5 @@
 // file: crates/ksp-onchain-transport-lib/unit_tests/rpc_transactions.rs
-// version: 3
+// version: 4
 
 #[test]
 fn transaction_encoding_strings_match_current_and_legacy_wire_labels() {
@@ -470,3 +470,219 @@ async fn typed_is_blockhash_valid_preserves_opaque_blockhash_and_contextual_bool
     assert_eq!(body["method"], serde_json::json!("isBlockhashValid"));
     assert_eq!(body["params"], serde_json::json!(["opaque-blockhash", {"commitment":"processed","minContextSlot":431000004}]));
 }
+
+#[tokio::test(flavor = "current_thread")]
+async fn typed_get_recent_prioritization_fees_serializes_addresses_and_preserves_server_order() {
+    let (url, handle) = serve_transaction_once(include_str!("../fixtures/http/get_recent_prioritization_fees.success.json"));
+    let pool = transaction_pool_for_url(url.as_str());
+    let first = "11111111111111111111111111111111".parse::<ksp_core_lib::Pubkey>().expect("fixture pubkey must parse");
+    let second = "SysvarRent111111111111111111111111111111111".parse::<ksp_core_lib::Pubkey>().expect("fixture pubkey must parse");
+    let first_text = first.to_string();
+    let second_text = second.to_string();
+    let accounts = std::vec![first, second];
+    let fees = pool
+        .get_recent_prioritization_fees(&crate::HttpRoleName::new("default"), std::option::Option::Some(accounts.as_slice()))
+        .await
+        .expect("getRecentPrioritizationFees fixture must succeed");
+    assert_eq!(fees.len(), 2);
+    assert_eq!(fees[0].slot(), 431_000_030);
+    assert_eq!(fees[0].prioritization_fee(), 1_200);
+    assert_eq!(fees[1].slot(), 431_000_029);
+    assert_eq!(fees[1].prioritization_fee(), 0);
+    let request = handle.join().expect("fixture server must join");
+    let body = transaction_request_body(request.as_str());
+    assert_eq!(body["method"], serde_json::json!("getRecentPrioritizationFees"));
+    assert_eq!(body["params"], serde_json::json!([[first_text, second_text]]));
+}
+
+#[tokio::test(flavor = "current_thread")]
+async fn typed_get_recent_prioritization_fees_omits_optional_accounts_and_rejects_more_than_128_before_io() {
+    let (url, handle) = serve_transaction_once(include_str!("../fixtures/http/get_recent_prioritization_fees.success.json"));
+    let pool = transaction_pool_for_url(url.as_str());
+    let fees = pool
+        .get_recent_prioritization_fees(&crate::HttpRoleName::new("default"), std::option::Option::None)
+        .await
+        .expect("getRecentPrioritizationFees without addresses must succeed");
+    assert_eq!(fees.len(), 2);
+    let request = handle.join().expect("fixture server must join");
+    assert_eq!(transaction_request_body(request.as_str())["params"], serde_json::json!([]));
+
+    let account = "11111111111111111111111111111111".parse::<ksp_core_lib::Pubkey>().expect("fixture pubkey must parse");
+    let max_accounts = std::vec![account; 128];
+    let (url, handle) = serve_transaction_once(include_str!("../fixtures/http/get_recent_prioritization_fees.success.json"));
+    let max_pool = transaction_pool_for_url(url.as_str());
+    let fees = max_pool
+        .get_recent_prioritization_fees(&crate::HttpRoleName::new("default"), std::option::Option::Some(max_accounts.as_slice()))
+        .await
+        .expect("exactly 128 prioritization-fee accounts must remain accepted");
+    assert_eq!(fees.len(), 2);
+    let request = handle.join().expect("fixture server must join");
+    let body = transaction_request_body(request.as_str());
+    assert_eq!(body["params"][0].as_array().expect("address parameter must be an array").len(), 128);
+
+    let invalid_pool = transaction_pool_for_url("http://127.0.0.1:9");
+    let accounts = std::vec![account; 129];
+    let result = invalid_pool.get_recent_prioritization_fees(&crate::HttpRoleName::new("default"), std::option::Option::Some(accounts.as_slice())).await;
+    let error = result.expect_err("more than 128 prioritization-fee accounts must reject before I/O");
+    assert_eq!(error.code(), crate::ERROR_CODE_INVALID_RPC_PARAMETERS);
+    assert_eq!(error.context()[1].key(), "account_count");
+    assert_eq!(error.context()[1].value(), "129");
+}
+
+#[tokio::test(flavor = "current_thread")]
+async fn typed_get_signatures_for_address_serializes_pagination_and_preserves_newest_first_result() {
+    let (url, handle) = serve_transaction_once(include_str!("../fixtures/http/get_signatures_for_address.success.json"));
+    let pool = transaction_pool_for_url(url.as_str());
+    let address = "11111111111111111111111111111111".parse::<ksp_core_lib::Pubkey>().expect("fixture pubkey must parse");
+    let config = crate::SolanaSignaturesForAddressConfig::new(
+        std::option::Option::Some("before-signature".to_owned()),
+        std::option::Option::Some("until-signature".to_owned()),
+        std::option::Option::Some(1_000),
+        std::option::Option::Some(crate::SolanaCommitment::Finalized),
+        std::option::Option::Some(431_000_000),
+    );
+    let signatures = pool
+        .get_signatures_for_address(&crate::HttpRoleName::new("default"), &address, std::option::Option::Some(&config))
+        .await
+        .expect("getSignaturesForAddress fixture must succeed");
+    assert_eq!(signatures.len(), 2);
+    assert_eq!(signatures[0].signature(), "newest-signature");
+    assert_eq!(signatures[0].slot(), 431_000_040);
+    assert_eq!(signatures[0].memo(), std::option::Option::Some("memo-newest"));
+    assert_eq!(signatures[0].block_time(), std::option::Option::Some(1_787_000_100));
+    assert_eq!(signatures[0].confirmation_status(), std::option::Option::Some(crate::SolanaTransactionConfirmationStatus::Finalized));
+    assert_eq!(signatures[0].transaction_index(), std::option::Option::Some(9));
+    assert_eq!(signatures[1].signature(), "older-signature");
+    assert!(signatures[1].err().is_some());
+    assert_eq!(signatures[1].memo(), std::option::Option::None);
+    assert_eq!(signatures[1].block_time(), std::option::Option::None);
+    assert_eq!(signatures[1].transaction_index(), std::option::Option::None);
+    let request = handle.join().expect("fixture server must join");
+    let body = transaction_request_body(request.as_str());
+    assert_eq!(body["method"], serde_json::json!("getSignaturesForAddress"));
+    assert_eq!(
+        body["params"],
+        serde_json::json!([
+            address.to_string(),
+            {
+                "before":"before-signature",
+                "until":"until-signature",
+                "limit":1000,
+                "commitment":"finalized",
+                "minContextSlot":431000000
+            }
+        ])
+    );
+}
+
+#[tokio::test(flavor = "current_thread")]
+async fn typed_get_signatures_for_address_rejects_limit_outside_1_to_1000_before_io() {
+    let pool = transaction_pool_for_url("http://127.0.0.1:9");
+    let address = "11111111111111111111111111111111".parse::<ksp_core_lib::Pubkey>().expect("fixture pubkey must parse");
+    for limit in [0_usize, 1_001_usize] {
+        let config = crate::SolanaSignaturesForAddressConfig::new(
+            std::option::Option::None,
+            std::option::Option::None,
+            std::option::Option::Some(limit),
+            std::option::Option::None,
+            std::option::Option::None,
+        );
+        let result = pool.get_signatures_for_address(&crate::HttpRoleName::new("default"), &address, std::option::Option::Some(&config)).await;
+        let error = result.expect_err("out-of-range getSignaturesForAddress limit must reject before I/O");
+        assert_eq!(error.code(), crate::ERROR_CODE_INVALID_RPC_PARAMETERS);
+        assert_eq!(error.context()[1].key(), "limit");
+        assert_eq!(error.context()[1].value(), limit.to_string());
+    }
+}
+
+#[tokio::test(flavor = "current_thread")]
+async fn typed_get_signatures_for_address_preserves_rpc_application_error() {
+    let (url, handle) = serve_transaction_once(include_str!("../fixtures/http/get_signatures_for_address.error.json"));
+    let pool = transaction_pool_for_url(url.as_str());
+    let address = "11111111111111111111111111111111".parse::<ksp_core_lib::Pubkey>().expect("fixture pubkey must parse");
+    let result = pool.get_signatures_for_address(&crate::HttpRoleName::new("default"), &address, std::option::Option::None).await;
+    let error = result.expect_err("remote transaction-history error must remain an RPC application error");
+    assert_eq!(error.code(), crate::ERROR_CODE_RPC_APPLICATION_ERROR);
+    handle.join().expect("fixture server must join");
+}
+
+#[tokio::test(flavor = "current_thread")]
+async fn typed_get_signature_statuses_preserves_positional_nulls_and_history_config() {
+    let (url, handle) = serve_transaction_once(include_str!("../fixtures/http/get_signature_statuses.success.json"));
+    let pool = transaction_pool_for_url(url.as_str());
+    let signatures = std::vec!["missing-signature".to_owned(), "finalized-signature".to_owned(), "confirmed-signature".to_owned()];
+    let config = crate::SolanaSignatureStatusesConfig::new(std::option::Option::Some(true));
+    let response = pool
+        .get_signature_statuses(&crate::HttpRoleName::new("default"), signatures.as_slice(), std::option::Option::Some(&config))
+        .await
+        .expect("getSignatureStatuses fixture must succeed");
+    assert_eq!(response.context().slot(), 431_000_050);
+    assert_eq!(response.context().api_version(), std::option::Option::Some("4.2.1"));
+    assert_eq!(response.value().len(), 3);
+    assert!(response.value()[0].is_none());
+    let finalized = response.value()[1].as_ref().expect("second positional status must be present");
+    assert_eq!(finalized.slot(), 431_000_049);
+    assert_eq!(finalized.confirmations(), std::option::Option::None);
+    assert_eq!(finalized.status(), &serde_json::json!({"Ok":null}));
+    assert_eq!(finalized.confirmation_status(), std::option::Option::Some(crate::SolanaTransactionConfirmationStatus::Finalized));
+    let confirmed = response.value()[2].as_ref().expect("third positional status must be present");
+    assert_eq!(confirmed.confirmations(), std::option::Option::Some(2));
+    assert!(confirmed.err().is_some());
+    let request = handle.join().expect("fixture server must join");
+    let body = transaction_request_body(request.as_str());
+    assert_eq!(body["method"], serde_json::json!("getSignatureStatuses"));
+    assert_eq!(body["params"], serde_json::json!([signatures, {"searchTransactionHistory":true}]));
+}
+
+#[tokio::test(flavor = "current_thread")]
+async fn typed_get_signature_statuses_accepts_empty_input_and_omits_empty_config() {
+    let (url, handle) = serve_transaction_once(include_str!("../fixtures/http/get_signature_statuses.empty.json"));
+    let pool = transaction_pool_for_url(url.as_str());
+    let signatures = std::vec::Vec::<std::string::String>::new();
+    let config = crate::SolanaSignatureStatusesConfig::default();
+    let response = pool
+        .get_signature_statuses(&crate::HttpRoleName::new("default"), signatures.as_slice(), std::option::Option::Some(&config))
+        .await
+        .expect("empty getSignatureStatuses input must remain accepted");
+    assert!(response.value().is_empty());
+    let request = handle.join().expect("fixture server must join");
+    assert_eq!(transaction_request_body(request.as_str())["params"], serde_json::json!([[]]));
+}
+
+#[tokio::test(flavor = "current_thread")]
+async fn typed_get_signature_statuses_accepts_256_and_rejects_more_than_256_before_io() {
+    let signatures = std::vec!["signature".to_owned(); 256];
+    let (url, handle) = serve_transaction_once(include_str!("../fixtures/http/get_signature_statuses.max_256.json"));
+    let pool = transaction_pool_for_url(url.as_str());
+    let response = pool
+        .get_signature_statuses(&crate::HttpRoleName::new("default"), signatures.as_slice(), std::option::Option::None)
+        .await
+        .expect("exactly 256 signatures must remain accepted");
+    assert_eq!(response.value().len(), 256);
+    let request = handle.join().expect("fixture server must join");
+    let body = transaction_request_body(request.as_str());
+    assert_eq!(body["params"][0].as_array().expect("signature parameter must be an array").len(), 256);
+
+    let invalid_pool = transaction_pool_for_url("http://127.0.0.1:9");
+    let signatures = std::vec!["signature".to_owned(); 257];
+    let result = invalid_pool.get_signature_statuses(&crate::HttpRoleName::new("default"), signatures.as_slice(), std::option::Option::None).await;
+    let error = result.expect_err("more than 256 signatures must reject before I/O");
+    assert_eq!(error.code(), crate::ERROR_CODE_INVALID_RPC_PARAMETERS);
+    assert_eq!(error.context()[1].key(), "signature_count");
+    assert_eq!(error.context()[1].value(), "257");
+}
+
+#[tokio::test(flavor = "current_thread")]
+async fn typed_get_signature_statuses_rejects_response_count_mismatch() {
+    let (url, handle) = serve_transaction_once(include_str!("../fixtures/http/get_signature_statuses.count_mismatch.json"));
+    let pool = transaction_pool_for_url(url.as_str());
+    let requested = std::vec!["first".to_owned(), "second".to_owned()];
+    let result = pool.get_signature_statuses(&crate::HttpRoleName::new("default"), requested.as_slice(), std::option::Option::None).await;
+    let error = result.expect_err("status response count mismatch must reject typed decoding");
+    assert_eq!(error.code(), crate::ERROR_CODE_INVALID_RESPONSE);
+    assert_eq!(error.context()[1].key(), "expected_count");
+    assert_eq!(error.context()[1].value(), "2");
+    assert_eq!(error.context()[2].key(), "actual_count");
+    assert_eq!(error.context()[2].value(), "1");
+    handle.join().expect("fixture server must join");
+}
diff --git a/deltas/0.2.3/pre.004.md b/deltas/0.2.3/pre.004.md
new file mode 100644
index 0000000..8beb7e3
--- /dev/null
+++ b/deltas/0.2.3/pre.004.md
@@ -0,0 +1,346 @@
+<!-- file: deltas/0.2.3/pre.004.md -->
+<!-- version: 1 -->
+
+# Delta `0.2.3-pre.004` — lectures Transaction avec cardinalités et statuts positionnels
+
+## Base requise
+
+Livraison précédente validée localement par l'opérateur :
+
+```text
+0.2.3-pre.003
+workspace.package.version = "0.2.3-pre.3"
+```
+
+La validation opérateur du 2026-08-18 a confirmé :
+
+```text
+cargo fmt --all                         OK
+cargo check --workspace                 OK
+cargo clippy --workspace --all-targets  OK
+cargo test -p ksp-onchain-transport-lib OK
+```
+
+Résultats Transport de cette base :
+
+```text
+152 unit tests
+15 public API tests
+9 release completeness tests
+0 warning signalé par check/clippy
+```
+
+Le plan canonique reste `docs/plans/010-V0_2_3_HTTP_TRANSACTIONS_PLAN.md` version 3.
+
+## Objectif
+
+Implémenter les trois wrappers Transaction `Read / RetrySafe` prévus par la tranche `pre.004` :
+
+```text
+getRecentPrioritizationFees
+getSignaturesForAddress
+getSignatureStatuses
+```
+
+Ils rejoignent les quatre reads de `pre.003`, portant la surface Transaction typée exécutée à :
+
+```text
+7 / 11 wrappers
+```
+
+Les quatre méthodes restantes restent volontairement différées :
+
+```text
+getTransaction
+requestAirdrop
+sendTransaction
+simulateTransaction
+```
+
+## Version Cargo
+
+Conformément à `VER-ID-009` :
+
+```text
+0.2.3-pre.3 -> 0.2.3-pre.4
+```
+
+Aucune dépendance ni feature Cargo n'est ajoutée.
+
+## `getRecentPrioritizationFees`
+
+Surface publique conceptuelle :
+
+```text
+role + Option<&[Pubkey]>
+  -> Vec<SolanaPrioritizationFee>
+```
+
+Le tableau d'adresses reste optionnel :
+
+- `None` omet entièrement le paramètre ;
+- `Some(slice)` sérialise exactement un tableau d'adresses ;
+- l'ordre des adresses caller est conservé ;
+- les résultats restent dans l'ordre renvoyé par le provider.
+
+La cardinalité runtime documentée est appliquée avant I/O :
+
+```text
+0..=128  accepté
+129+     ERROR_CODE_INVALID_RPC_PARAMETERS
+```
+
+Le test couvre explicitement la borne `128` puis le rejet de `129`.
+
+Aucune règle locale n'est créée à partir de la profondeur actuelle de cache des prioritization fees : la valeur d'environ 150 blocs est une
+caractéristique runtime du noeud et non une cardinalité client.
+
+## `getSignaturesForAddress`
+
+Surface publique conceptuelle :
+
+```text
+role + Pubkey + Option<SolanaSignaturesForAddressConfig>
+  -> Vec<SolanaSignatureInfo>
+```
+
+La config préparée en `pre.002` devient production-live pour cette méthode :
+
+```text
+before
+until
+limit
+commitment
+minContextSlot
+```
+
+Une config absente ou entièrement vide est omise. La limite est validée avant I/O exactement selon le runtime audité :
+
+```text
+1..=1000 accepté quand limit est fourni
+0        rejeté
+1001+    rejeté
+```
+
+La fixture de succès utilise explicitement `limit = 1000`, puis les tests rejettent `0` et `1001`.
+
+Le résultat conserve notamment :
+
+```text
+signature
+slot
+err nullable
+memo nullable
+blockTime nullable
+confirmationStatus nullable
+transactionIndex optionnel
+```
+
+L'ordre `newest -> oldest` du provider n'est jamais retrié côté KSP. Les signatures restent des chaînes wire opaques dans cette release.
+
+Une fixture JSON-RPC d'erreur vérifie qu'une indisponibilité de transaction history reste une `RPC_APPLICATION_ERROR`, sans être transformée en
+retry Transport.
+
+## `getSignatureStatuses`
+
+Surface publique conceptuelle :
+
+```text
+role + &[String] + Option<SolanaSignatureStatusesConfig>
+  -> SolanaRpcResponse<Vec<Option<SolanaSignatureStatus>>>
+```
+
+La config `searchTransactionHistory` préparée en `pre.002` devient production-live. Une config vide est omise.
+
+Le tableau d'entrée suit exactement la borne Agave auditée :
+
+```text
+0..=256 accepté
+257+    ERROR_CODE_INVALID_RPC_PARAMETERS
+```
+
+Le tableau vide reste volontairement accepté, conformément au runtime `v4.2.1` audité en `pre.001`. La borne `256` est exercée par une fixture
+contenant 256 positions `null` et `257` est rejeté avant I/O.
+
+Le résultat conserve strictement la correspondance positionnelle :
+
+```text
+entrée[i] <-> value[i]
+null      -> None
+objet     -> Some(SolanaSignatureStatus)
+```
+
+KSP vérifie maintenant que le provider retourne exactement autant de positions que de signatures demandées. Une longueur différente produit
+`ERROR_CODE_INVALID_RESPONSE`, car continuer masquerait la correspondance signature/statut.
+
+Pour un statut présent, les champs suivants restent préservés :
+
+```text
+slot
+confirmations nullable
+status legacy lossless JSON
+err nullable
+confirmationStatus nullable
+```
+
+La forme `status` demeure un champ legacy du wire courant ; elle n'est pas confondue avec les anciennes méthodes RPC Deprecated.
+
+## Helpers activés en production
+
+Seuls les helpers nécessaires à cette tranche quittent `#[cfg(test)]` :
+
+```text
+SolanaSignaturesForAddressConfig::{is_empty,to_json_value}
+SolanaSignatureStatusesConfig::{is_empty,to_json_value}
+SolanaPrioritizationFee::decode_wire
+SolanaSignatureInfo::decode_wire
+SolanaSignatureStatus::decode_wire
+decode_confirmation_status
+WirePrioritizationFee
+WireSignatureInfo
+WireSignatureStatus
+```
+
+Les helpers de `getTransaction`, `requestAirdrop`, `sendTransaction` et `simulateTransaction` restent staged/test-only jusqu'à leur tranche
+propriétaire. Aucun `#[allow(dead_code)]` n'est introduit.
+
+## Fixtures HTTP déterministes ajoutées
+
+```text
+crates/ksp-onchain-transport-lib/fixtures/http/get_recent_prioritization_fees.success.json
+crates/ksp-onchain-transport-lib/fixtures/http/get_signatures_for_address.success.json
+crates/ksp-onchain-transport-lib/fixtures/http/get_signatures_for_address.error.json
+crates/ksp-onchain-transport-lib/fixtures/http/get_signature_statuses.success.json
+crates/ksp-onchain-transport-lib/fixtures/http/get_signature_statuses.empty.json
+crates/ksp-onchain-transport-lib/fixtures/http/get_signature_statuses.max_256.json
+crates/ksp-onchain-transport-lib/fixtures/http/get_signature_statuses.count_mismatch.json
+```
+
+Les tests HTTP utilisent uniquement un serveur loopback local.
+
+## Couverture de tests ajoutée
+
+Neuf tests unitaires HTTP supplémentaires couvrent :
+
+- paramètres exacts de `getRecentPrioritizationFees` et ordre serveur ;
+- omission du paramètre optionnel ;
+- acceptation de 128 adresses et rejet local de 129 ;
+- pagination/config complète de `getSignaturesForAddress` avec `limit = 1000` ;
+- rejet local de `limit = 0` et `limit = 1001` ;
+- propagation d'une erreur JSON-RPC applicative ;
+- `getSignatureStatuses` avec `searchTransactionHistory = true` et positions `null` ;
+- tableau vide + config vide omise ;
+- borne 256 acceptée, 257 rejetée et longueur de réponse incohérente rejetée.
+
+Un test public compile les trois nouveaux wrappers depuis la crate root.
+
+Une nouvelle canarie release fige le sous-ensemble Read exécuté cumulé de `pre.003 + pre.004` :
+
+```text
+getFeeForMessage
+getLatestBlockhash
+getRecentPrioritizationFees
+getSignaturesForAddress
+getSignatureStatuses
+getTransactionCount
+isBlockhashValid
+```
+
+Chaque descriptor reste :
+
+```text
+Transactions / V0_2_3 / Read / RetrySafe
+```
+
+La canarie confirme aussi que les quatre méthodes différées restent enregistrées dans `V0_2_3` sans les compter comme surface typée achevée.
+
+Après application, la cible Transport attendue devient :
+
+```text
+161 unit tests
+16 public API tests
+10 release completeness tests
+```
+
+## Fichiers ajoutés
+
+```text
+crates/ksp-onchain-transport-lib/fixtures/http/get_recent_prioritization_fees.success.json
+crates/ksp-onchain-transport-lib/fixtures/http/get_signatures_for_address.success.json
+crates/ksp-onchain-transport-lib/fixtures/http/get_signatures_for_address.error.json
+crates/ksp-onchain-transport-lib/fixtures/http/get_signature_statuses.success.json
+crates/ksp-onchain-transport-lib/fixtures/http/get_signature_statuses.empty.json
+crates/ksp-onchain-transport-lib/fixtures/http/get_signature_statuses.max_256.json
+crates/ksp-onchain-transport-lib/fixtures/http/get_signature_statuses.count_mismatch.json
+deltas/0.2.3/pre.004.md
+```
+
+## Fichiers modifiés
+
+```text
+Cargo.toml
+crates/ksp-onchain-transport-lib/src/lib.rs
+crates/ksp-onchain-transport-lib/src/rpc_transactions.rs
+crates/ksp-onchain-transport-lib/unit_tests/rpc_transactions.rs
+crates/ksp-onchain-transport-lib/tests/public_api.rs
+crates/ksp-onchain-transport-lib/tests/release_completeness.rs
+```
+
+Restent inchangés dans cette tranche :
+
+```text
+CHANGELOG.md
+ROADMAP.md
+docs/plans/010-V0_2_3_HTTP_TRANSACTIONS_PLAN.md
+crates/ksp-onchain-transport-lib/Cargo.toml
+crates/ksp-onchain-transport-lib/src/executor.rs
+crates/ksp-onchain-transport-lib/src/resilience.rs
+crates/ksp-onchain-transport-lib/src/rpc_method.rs
+```
+
+## Contrôles statiques effectués dans l'environnement d'échange
+
+- les sept nouvelles fixtures sont du JSON valide ;
+- aucune dépendance n'est ajoutée ;
+- aucun `reqwest`, `tracing`, retry local ou client parallèle n'est introduit par le diff ;
+- aucun `#[allow(dead_code)]` n'est introduit ;
+- les helpers des tranches futures restent `#[cfg(test)]` ;
+- aucune ligne Rust modifiée ne dépasse 160 colonnes ;
+- `CHANGELOG.md`, `ROADMAP.md`, le plan `010`, `executor.rs`, `resilience.rs` et `rpc_method.rs` restent identiques à `pre.003`.
+
+`cargo`, `rustc` et `rustfmt` ne sont pas installés dans l'environnement d'échange. Aucune validation Cargo de `pre.004` n'est donc déclarée
+réussie ici.
+
+## Validation opérateur requise
+
+```bash
+cargo fmt --all
+cargo check --workspace
+cargo clippy --workspace --all-targets
+cargo test -p ksp-onchain-transport-lib
+```
+
+La validation doit notamment confirmer :
+
+```text
+0 warning check/clippy
+161 unit tests
+16 public API tests
+10 release completeness tests
+```
+
+Le smoke Devnet reste opt-in et n'est pas requis pour cette tranche locale déterministe.
+
+## Hors scope maintenu
+
+`pre.004` ne traite pas :
+
+- `getTransaction` moderne/legacy ;
+- `requestAirdrop` ;
+- `sendTransaction` ;
+- la preuve end-to-end no-resend des writes ;
+- `simulateTransaction` ;
+- les 15 méthodes `0.2.4` Blocks/Economics ;
+- un nouveau smoke cross-crates.
+
+La prochaine tranche reste `pre.005` : `getTransaction` moderne, compatibilité legacy et wire transaction/meta/version.