diff --git a/boot/modules/acquiring/src/main/java/com/klaro/acquirecore/acquiring/repository/AcquireTransactionRepository.java b/boot/modules/acquiring/src/main/java/com/klaro/acquirecore/acquiring/repository/AcquireTransactionRepository.java
new file mode 100644
index 0000000..8be0bdd
--- /dev/null
+++ b/boot/modules/acquiring/src/main/java/com/klaro/acquirecore/acquiring/repository/AcquireTransactionRepository.java
@@ -0,0 +1,32 @@
+package com.klaro.acquirecore.acquiring.repository;
+
+import com.klaro.acquirecore.acquiring.codec.ParsedMessage;
+
+import java.util.Optional;
+
+/**
+ * 매입 거래 Repository 인터페이스 (DB 접근 스텁)
+ */
+public interface AcquireTransactionRepository {
+
+    /**
+     * 거래ID로 거래 조회
+     * @param txId 거래ID
+     * @return 거래 정보
+     */
+    Optional<ParsedMessage> findByTxId(String txId);
+
+    /**
+     * 거래 저장
+     * @param message 거래 정보
+     * @return 저장 성공 여부
+     */
+    boolean save(ParsedMessage message);
+
+    /**
+     * 거래ID로 삭제
+     * @param txId 거래ID
+     * @return 삭제 성공 여부
+     */
+    boolean deleteByTxId(String txId);
+}