diff --git a/README.md b/README.md
index 58efaa2..f35fe6a 100644
--- a/README.md
+++ b/README.md
@@ -22,7 +22,7 @@
                         }
                     },
                     "401": {
-                        "description": "Unauthorized"
+                        "$ref": "#/components/responses/UnauthorizedResponse"
                     }
                 }
             }
@@ -44,7 +44,7 @@
                         }
                     },
                     "401": {
-                        "description": "Unauthorized"
+                        "$ref": "#/components/responses/UnauthorizedResponse"
                     }
                 }
             }
@@ -72,10 +72,10 @@
                         }
                     },
                     "400": {
-                        "description": "Bad Request"
+                        "$ref": "#/components/responses/BadRequestResponse"
                     },
                     "401": {
-                        "description": "Unauthorized"
+                        "$ref": "#/components/responses/UnauthorizedResponse"
                     }
                 }
             }
@@ -87,23 +87,13 @@
                 ],
                 "responses": {
                     "200": {
-                        "description": "Success",
-                        "content": {
-                            "application/json": {
-                                "schema": {
-                                    "type": "array",
-                                    "items": {
-                                        "$ref": "#/components/schemas/StoreItem"
-                                    }
-                                }
-                            }
-                        }
+                        "$ref": "#/components/responses/StoreItemListResponse"
                     },
                     "400": {
-                        "description": "Bad Request"
+                        "$ref": "#/components/responses/BadRequestResponse"
                     },
                     "401": {
-                        "description": "Unauthorized"
+                        "$ref": "#/components/responses/UnauthorizedResponse"
                     }
                 }
             }
@@ -114,40 +104,17 @@
                     "AdminStore"
                 ],
                 "requestBody": {
-                    "content": {
-                        "application/json": {
-                            "schema": {
-                                "$ref": "#/components/schemas/StoreItem"
-                            }
-                        },
-                        "text/json": {
-                            "schema": {
-                                "$ref": "#/components/schemas/StoreItem"
-                            }
-                        },
-                        "application/*+json": {
-                            "schema": {
-                                "$ref": "#/components/schemas/StoreItem"
-                            }
-                        }
-                    }
+                    "$ref": "#/components/requestBodies/StoreItemBody"
                 },
                 "responses": {
                     "200": {
-                        "description": "Success",
-                        "content": {
-                            "application/json": {
-                                "schema": {
-                                    "$ref": "#/components/schemas/EmptyResult"
-                                }
-                            }
-                        }
+                        "$ref": "#/components/responses/EmptyResultResponse"
                     },
                     "400": {
-                        "description": "Bad Request"
+                        "$ref": "#/components/responses/BadRequestResponse"
                     },
                     "401": {
-                        "description": "Unauthorized"
+                        "$ref": "#/components/responses/UnauthorizedResponse"
                     }
                 }
             }
@@ -159,13 +126,7 @@
                 ],
                 "parameters": [
                     {
-                        "name": "id",
-                        "in": "path",
-                        "required": true,
-                        "schema": {
-                            "type": "integer",
-                            "format": "int32"
-                        }
+                        "$ref": "#/components/parameters/PathId"
                     }
                 ],
                 "responses": {
@@ -180,10 +141,10 @@
                         }
                     },
                     "400": {
-                        "description": "Bad Request"
+                        "$ref": "#/components/responses/BadRequestResponse"
                     },
                     "401": {
-                        "description": "Unauthorized"
+                        "$ref": "#/components/responses/UnauthorizedResponse"
                     }
                 }
             }
@@ -195,33 +156,11 @@
                 ],
                 "parameters": [
                     {
-                        "name": "id",
-                        "in": "path",
-                        "required": true,
-                        "schema": {
-                            "type": "integer",
-                            "format": "int32"
-                        }
+                        "$ref": "#/components/parameters/PathId"
                     }
                 ],
                 "requestBody": {
-                    "content": {
-                        "application/json": {
-                            "schema": {
-                                "$ref": "#/components/schemas/StoreItem"
-                            }
-                        },
-                        "text/json": {
-                            "schema": {
-                                "$ref": "#/components/schemas/StoreItem"
-                            }
-                        },
-                        "application/*+json": {
-                            "schema": {
-                                "$ref": "#/components/schemas/StoreItem"
-                            }
-                        }
-                    }
+                    "$ref": "#/components/requestBodies/StoreItemBody"
                 },
                 "responses": {
                     "200": {
@@ -235,10 +174,10 @@
                         }
                     },
                     "400": {
-                        "description": "Bad Request"
+                        "$ref": "#/components/responses/BadRequestResponse"
                     },
                     "401": {
-                        "description": "Unauthorized"
+                        "$ref": "#/components/responses/UnauthorizedResponse"
                     }
                 }
             }
@@ -249,40 +188,17 @@
                     "AdminStore"
                 ],
                 "requestBody": {
-                    "content": {
-                        "application/json": {
-                            "schema": {
-                                "$ref": "#/components/schemas/StoreItem"
-                            }
-                        },
-                        "text/json": {
-                            "schema": {
-                                "$ref": "#/components/schemas/StoreItem"
-                            }
-                        },
-                        "application/*+json": {
-                            "schema": {
-                                "$ref": "#/components/schemas/StoreItem"
-                            }
-                        }
-                    }
+                    "$ref": "#/components/requestBodies/StoreItemBody"
                 },
                 "responses": {
                     "200": {
-                        "description": "Success",
-                        "content": {
-                            "application/json": {
-                                "schema": {
-                                    "$ref": "#/components/schemas/EmptyResult"
-                                }
-                            }
-                        }
+                        "$ref": "#/components/responses/EmptyResultResponse"
                     },
                     "400": {
-                        "description": "Bad Request"
+                        "$ref": "#/components/responses/BadRequestResponse"
                     },
                     "401": {
-                        "description": "Unauthorized"
+                        "$ref": "#/components/responses/UnauthorizedResponse"
                     }
                 }
             }
@@ -293,23 +209,7 @@
                     "Auth"
                 ],
                 "requestBody": {
-                    "content": {
-                        "application/json": {
-                            "schema": {
-                                "$ref": "#/components/schemas/UserModel"
-                            }
-                        },
-                        "text/json": {
-                            "schema": {
-                                "$ref": "#/components/schemas/UserModel"
-                            }
-                        },
-                        "application/*+json": {
-                            "schema": {
-                                "$ref": "#/components/schemas/UserModel"
-                            }
-                        }
-                    }
+                    "$ref": "#/components/requestBodies/UserModelBody"
                 },
                 "responses": {
                     "200": {
@@ -323,7 +223,7 @@
                         }
                     },
                     "400": {
-                        "description": "Bad Request"
+                        "$ref": "#/components/responses/BadRequestResponse"
                     }
                 }
             }
@@ -335,14 +235,7 @@
                 ],
                 "responses": {
                     "200": {
-                        "description": "Success",
-                        "content": {
-                            "application/json": {
-                                "schema": {
-                                    "$ref": "#/components/schemas/EmptyResult"
-                                }
-                            }
-                        }
+                        "$ref": "#/components/responses/EmptyResultResponse"
                     }
                 }
             }
@@ -353,37 +246,14 @@
                     "Auth"
                 ],
                 "requestBody": {
-                    "content": {
-                        "application/json": {
-                            "schema": {
-                                "$ref": "#/components/schemas/UserModel"
-                            }
-                        },
-                        "text/json": {
-                            "schema": {
-                                "$ref": "#/components/schemas/UserModel"
-                            }
-                        },
-                        "application/*+json": {
-                            "schema": {
-                                "$ref": "#/components/schemas/UserModel"
-                            }
-                        }
-                    }
+                    "$ref": "#/components/requestBodies/UserModelBody"
                 },
                 "responses": {
                     "200": {
-                        "description": "Success",
-                        "content": {
-                            "application/json": {
-                                "schema": {
-                                    "$ref": "#/components/schemas/EmptyResult"
-                                }
-                            }
-                        }
+                        "$ref": "#/components/responses/EmptyResultResponse"
                     },
                     "400": {
-                        "description": "Bad Request"
+                        "$ref": "#/components/responses/BadRequestResponse"
                     }
                 }
             }
@@ -394,37 +264,14 @@
                     "Auth"
                 ],
                 "requestBody": {
-                    "content": {
-                        "application/json": {
-                            "schema": {
-                                "$ref": "#/components/schemas/UserModel"
-                            }
-                        },
-                        "text/json": {
-                            "schema": {
-                                "$ref": "#/components/schemas/UserModel"
-                            }
-                        },
-                        "application/*+json": {
-                            "schema": {
-                                "$ref": "#/components/schemas/UserModel"
-                            }
-                        }
-                    }
+                    "$ref": "#/components/requestBodies/UserModelBody"
                 },
                 "responses": {
                     "200": {
-                        "description": "Success",
-                        "content": {
-                            "application/json": {
-                                "schema": {
-                                    "$ref": "#/components/schemas/EmptyResult"
-                                }
-                            }
-                        }
+                        "$ref": "#/components/responses/EmptyResultResponse"
                     },
                     "400": {
-                        "description": "Bad Request"
+                        "$ref": "#/components/responses/BadRequestResponse"
                     }
                 }
             }
@@ -435,37 +282,14 @@
                     "Auth"
                 ],
                 "requestBody": {
-                    "content": {
-                        "application/json": {
-                            "schema": {
-                                "$ref": "#/components/schemas/UserModel"
-                            }
-                        },
-                        "text/json": {
-                            "schema": {
-                                "$ref": "#/components/schemas/UserModel"
-                            }
-                        },
-                        "application/*+json": {
-                            "schema": {
-                                "$ref": "#/components/schemas/UserModel"
-                            }
-                        }
-                    }
+                    "$ref": "#/components/requestBodies/UserModelBody"
                 },
                 "responses": {
                     "200": {
-                        "description": "Success",
-                        "content": {
-                            "application/json": {
-                                "schema": {
-                                    "$ref": "#/components/schemas/EmptyResult"
-                                }
-                            }
-                        }
+                        "$ref": "#/components/responses/EmptyResultResponse"
                     },
                     "400": {
-                        "description": "Bad Request"
+                        "$ref": "#/components/responses/BadRequestResponse"
                     }
                 }
             }
@@ -476,37 +300,14 @@
                     "ContactUs"
                 ],
                 "requestBody": {
-                    "content": {
-                        "application/json": {
-                            "schema": {
-                                "$ref": "#/components/schemas/UserModel"
-                            }
-                        },
-                        "text/json": {
-                            "schema": {
-                                "$ref": "#/components/schemas/UserModel"
-                            }
-                        },
-                        "application/*+json": {
-                            "schema": {
-                                "$ref": "#/components/schemas/UserModel"
-                            }
-                        }
-                    }
+                    "$ref": "#/components/requestBodies/UserModelBody"
                 },
                 "responses": {
                     "200": {
-                        "description": "Success",
-                        "content": {
-                            "application/json": {
-                                "schema": {
-                                    "$ref": "#/components/schemas/EmptyResult"
-                                }
-                            }
-                        }
+                        "$ref": "#/components/responses/EmptyResultResponse"
                     },
                     "400": {
-                        "description": "Bad Request"
+                        "$ref": "#/components/responses/BadRequestResponse"
                     }
                 }
             }
@@ -563,7 +364,7 @@
                         }
                     },
                     "401": {
-                        "description": "Unauthorized"
+                        "$ref": "#/components/responses/UnauthorizedResponse"
                     }
                 }
             }
@@ -575,20 +376,10 @@
                 ],
                 "responses": {
                     "200": {
-                        "description": "Success",
-                        "content": {
-                            "application/json": {
-                                "schema": {
-                                    "type": "array",
-                                    "items": {
-                                        "$ref": "#/components/schemas/StoreItem"
-                                    }
-                                }
-                            }
-                        }
+                        "$ref": "#/components/responses/StoreItemListResponse"
                     },
                     "401": {
-                        "description": "Unauthorized"
+                        "$ref": "#/components/responses/UnauthorizedResponse"
                     }
                 }
             }
@@ -623,7 +414,7 @@
                         }
                     },
                     "401": {
-                        "description": "Unauthorized"
+                        "$ref": "#/components/responses/UnauthorizedResponse"
                     }
                 }
             }
@@ -634,40 +425,17 @@
                     "Store"
                 ],
                 "requestBody": {
-                    "content": {
-                        "application/json": {
-                            "schema": {
-                                "$ref": "#/components/schemas/BuyProductReq"
-                            }
-                        },
-                        "text/json": {
-                            "schema": {
-                                "$ref": "#/components/schemas/BuyProductReq"
-                            }
-                        },
-                        "application/*+json": {
-                            "schema": {
-                                "$ref": "#/components/schemas/BuyProductReq"
-                            }
-                        }
-                    }
+                    "$ref": "#/components/requestBodies/BuyProductReqBody"
                 },
                 "responses": {
                     "200": {
-                        "description": "Success",
-                        "content": {
-                            "application/json": {
-                                "schema": {
-                                    "$ref": "#/components/schemas/EmptyResult"
-                                }
-                            }
-                        }
+                        "$ref": "#/components/responses/EmptyResultResponse"
                     },
                     "400": {
-                        "description": "Bad Request"
+                        "$ref": "#/components/responses/BadRequestResponse"
                     },
                     "401": {
-                        "description": "Unauthorized"
+                        "$ref": "#/components/responses/UnauthorizedResponse"
                     }
                 }
             }
@@ -679,13 +447,7 @@
                 ],
                 "parameters": [
                     {
-                        "name": "id",
-                        "in": "path",
-                        "required": true,
-                        "schema": {
-                            "type": "integer",
-                            "format": "int32"
-                        }
+                        "$ref": "#/components/parameters/PathId"
                     }
                 ],
                 "responses": {
@@ -700,10 +462,10 @@
                         }
                     },
                     "401": {
-                        "description": "Unauthorized"
+                        "$ref": "#/components/responses/UnauthorizedResponse"
                     },
                     "404": {
-                        "description": "Not Found"
+                        "$ref": "#/components/responses/NotFoundResponse"
                     }
                 }
             }
@@ -751,7 +513,7 @@
                         }
                     },
                     "401": {
-                        "description": "Unauthorized"
+                        "$ref": "#/components/responses/UnauthorizedResponse"
                     }
                 }
             }
@@ -786,7 +548,7 @@
                         }
                     },
                     "401": {
-                        "description": "Unauthorized"
+                        "$ref": "#/components/responses/UnauthorizedResponse"
                     }
                 }
             }
@@ -797,40 +559,17 @@
                     "Transaction"
                 ],
                 "requestBody": {
-                    "content": {
-                        "application/json": {
-                            "schema": {
-                                "$ref": "#/components/schemas/TransactionDBModel"
-                            }
-                        },
-                        "text/json": {
-                            "schema": {
-                                "$ref": "#/components/schemas/TransactionDBModel"
-                            }
-                        },
-                        "application/*+json": {
-                            "schema": {
-                                "$ref": "#/components/schemas/TransactionDBModel"
-                            }
-                        }
-                    }
+                    "$ref": "#/components/requestBodies/TransactionDBModelBody"
                 },
                 "responses": {
                     "200": {
-                        "description": "Success",
-                        "content": {
-                            "application/json": {
-                                "schema": {
-                                    "$ref": "#/components/schemas/EmptyResult"
-                                }
-                            }
-                        }
+                        "$ref": "#/components/responses/EmptyResultResponse"
                     },
                     "400": {
-                        "description": "Bad Request"
+                        "$ref": "#/components/responses/BadRequestResponse"
                     },
                     "401": {
-                        "description": "Unauthorized"
+                        "$ref": "#/components/responses/UnauthorizedResponse"
                     }
                 }
             }
@@ -861,23 +600,7 @@
                     "User"
                 ],
                 "requestBody": {
-                    "content": {
-                        "application/json": {
-                            "schema": {
-                                "$ref": "#/components/schemas/NewImageModel"
-                            }
-                        },
-                        "text/json": {
-                            "schema": {
-                                "$ref": "#/components/schemas/NewImageModel"
-                            }
-                        },
-                        "application/*+json": {
-                            "schema": {
-                                "$ref": "#/components/schemas/NewImageModel"
-                            }
-                        }
-                    }
+                    "$ref": "#/components/requestBodies/NewImageModelBody"
                 },
                 "responses": {
                     "200": {
@@ -917,6 +640,148 @@
         }
     },
     "components": {
+        "parameters": {
+            "PathId": {
+                "name": "id",
+                "in": "path",
+                "required": true,
+                "schema": {
+                    "type": "integer",
+                    "format": "int32"
+                }
+            }
+        },
+        "requestBodies": {
+            "UserModelBody": {
+                "content": {
+                    "application/json": {
+                        "schema": {
+                            "$ref": "#/components/schemas/UserModel"
+                        }
+                    },
+                    "text/json": {
+                        "schema": {
+                            "$ref": "#/components/schemas/UserModel"
+                        }
+                    },
+                    "application/*+json": {
+                        "schema": {
+                            "$ref": "#/components/schemas/UserModel"
+                        }
+                    }
+                }
+            },
+            "StoreItemBody": {
+                "content": {
+                    "application/json": {
+                        "schema": {
+                            "$ref": "#/components/schemas/StoreItem"
+                        }
+                    },
+                    "text/json": {
+                        "schema": {
+                            "$ref": "#/components/schemas/StoreItem"
+                        }
+                    },
+                    "application/*+json": {
+                        "schema": {
+                            "$ref": "#/components/schemas/StoreItem"
+                        }
+                    }
+                }
+            },
+            "BuyProductReqBody": {
+                "content": {
+                    "application/json": {
+                        "schema": {
+                            "$ref": "#/components/schemas/BuyProductReq"
+                        }
+                    },
+                    "text/json": {
+                        "schema": {
+                            "$ref": "#/components/schemas/BuyProductReq"
+                        }
+                    },
+                    "application/*+json": {
+                        "schema": {
+                            "$ref": "#/components/schemas/BuyProductReq"
+                        }
+                    }
+                }
+            },
+            "TransactionDBModelBody": {
+                "content": {
+                    "application/json": {
+                        "schema": {
+                            "$ref": "#/components/schemas/TransactionDBModel"
+                        }
+                    },
+                    "text/json": {
+                        "schema": {
+                            "$ref": "#/components/schemas/TransactionDBModel"
+                        }
+                    },
+                    "application/*+json": {
+                        "schema": {
+                            "$ref": "#/components/schemas/TransactionDBModel"
+                        }
+                    }
+                }
+            },
+            "NewImageModelBody": {
+                "content": {
+                    "application/json": {
+                        "schema": {
+                            "$ref": "#/components/schemas/NewImageModel"
+                        }
+                    },
+                    "text/json": {
+                        "schema": {
+                            "$ref": "#/components/schemas/NewImageModel"
+                        }
+                    },
+                    "application/*+json": {
+                        "schema": {
+                            "$ref": "#/components/schemas/NewImageModel"
+                        }
+                    }
+                }
+            }
+        },
+        "responses": {
+            "UnauthorizedResponse": {
+                "description": "Unauthorized"
+            },
+            "BadRequestResponse": {
+                "description": "Bad Request"
+            },
+            "NotFoundResponse": {
+                "description": "Not Found"
+            },
+            "EmptyResultResponse": {
+                "description": "Success",
+                "content": {
+                    "application/json": {
+                        "schema": {
+                            "$ref": "#/components/schemas/EmptyResult"
+                        }
+                    }
+                }
+            },
+            "StoreItemListResponse": {
+                "description": "Success",
+                "content": {
+                    "application/json": {
+                        "schema": {
+                            "type": "array",
+                            "items": {
+                                "$ref": "#/components/schemas/StoreItem"
+                            }
+                        }
+                    }
+                }
+            }
+        },
         "schemas": {
             "TransactionResp": {
                 "type": "object",
@@ -967,8 +832,9 @@
                     }
                 }
             },
-            "TransactionRespDataTableResp": {
+            "DataTableResp": {
                 "type": "object",
+                "description": "Base paginated response wrapper. Used by TransactionRespDataTableResp and AdminUserInfoRespDataTableResp.",
                 "properties": {
                     "recordsTotal": {
                         "type": "integer",
@@ -977,16 +843,28 @@
                     "recordsFiltered": {
                         "type": "integer",
                         "format": "int32"
-                    },
-                    "data": {
-                        "type": "array",
-                        "items": {
-                            "$ref": "#/components/schemas/TransactionResp"
-                        },
-                        "nullable": true
                     }
                 }
             },
+            "TransactionRespDataTableResp": {
+                "allOf": [
+                    {
+                        "$ref": "#/components/schemas/DataTableResp"
+                    },
+                    {
+                        "type": "object",
+                        "properties": {
+                            "data": {
+                                "type": "array",
+                                "items": {
+                                    "$ref": "#/components/schemas/TransactionResp"
+                                },
+                                "nullable": true
+                            }
+                        }
+                    }
+                ]
+            },
             "AdminUserInfoResp": {
                 "type": "object",
                 "properties": {
@@ -1009,24 +887,23 @@
                 }
             },
             "AdminUserInfoRespDataTableResp": {
-                "type": "object",
-                "properties": {
-                    "recordsTotal": {
-                        "type": "integer",
-                        "format": "int32"
-                    },
-                    "recordsFiltered": {
-                        "type": "integer",
-                        "format": "int32"
+                "allOf": [
+                    {
+                        "$ref": "#/components/schemas/DataTableResp"
                     },
-                    "data": {
-                        "type": "array",
-                        "items": {
-                            "$ref": "#/components/schemas/AdminUserInfoResp"
-                        },
-                        "nullable": true
+                    {
+                        "type": "object",
+                        "properties": {
+                            "data": {
+                                "type": "array",
+                                "items": {
+                                    "$ref": "#/components/schemas/AdminUserInfoResp"
+                                },
+                                "nullable": true
+                            }
+                        }
                     }
-                }
+                ]
             },
             "PurcahseHistoryItemResp": {
                 "type": "object",