0.7.28

kb_lib/src/dex_decode_context.rs

@@ -0,0 +1,55 @@
+// file: kb_lib/src/dex_decode_context.rs
+
+//! Transaction context loading for DEX decoding.
+//!
+//! This module loads the persisted transaction and projected instructions
+//! required by `DexDecodeService`.
+
+/// Transaction context required by DEX decoding.
+pub(crate) struct DexDecodeTransactionContext {
+    /// Persisted chain transaction.
+    pub(crate) transaction: crate::ChainTransactionDto,
+    /// Projected transaction instructions.
+    pub(crate) instructions: std::vec::Vec<crate::ChainInstructionDto>,
+}
+
+/// Loads the transaction and its projected instructions for DEX decoding.
+pub(crate) async fn load_dex_decode_transaction_context(
+    database: &crate::Database,
+    signature: &str,
+) -> Result<crate::dex_decode_context::DexDecodeTransactionContext, crate::Error> {
+    let transaction_result =
+        crate::query_chain_transactions_get_by_signature(database, signature).await;
+    let transaction_option = match transaction_result {
+        Ok(transaction_option) => transaction_option,
+        Err(error) => return Err(error),
+    };
+    let transaction = match transaction_option {
+        Some(transaction) => transaction,
+        None => {
+            return Err(crate::Error::InvalidState(format!(
+                "cannot decode unknown chain transaction '{}'",
+                signature
+            )));
+        },
+    };
+    let transaction_id = match transaction.id {
+        Some(transaction_id) => transaction_id,
+        None => {
+            return Err(crate::Error::InvalidState(format!(
+                "chain transaction '{}' has no internal id",
+                signature
+            )));
+        },
+    };
+    let instructions_result =
+        crate::query_chain_instructions_list_by_transaction_id(database, transaction_id).await;
+    let instructions = match instructions_result {
+        Ok(instructions) => instructions,
+        Err(error) => return Err(error),
+    };
+    return Ok(crate::dex_decode_context::DexDecodeTransactionContext {
+        transaction,
+        instructions,
+    });
+}