# Creating and Updating ABAP Interfaces (Low-Level)
## Step 1: Get Session
**Tool**: `GetSession`
**Request**:
```json
{"force_new":false}
```
**Response**:
```json
{"success":true,"session_id":"a1b2c3d4e5f6789012345678901234567890abcd","session_state":{"cookies":"SAP_SESSIONID_E19_100=xyz123abc; Path=/; HttpOnly","csrf_token":"AbCdEf123456","cookie_store":{}}}
```
---
## Step 2: Validate Interface
**Tool**: `ValidateInterfaceLow`
**Request**:
```json
{"interface_name":"ZIF_TEST_001","package_name":"ZOK_LAB","session_id":"a1b2c3d4e5f6789012345678901234567890abcd","session_state":{"cookies":"SAP_SESSIONID_E19_100=xyz123abc; Path=/; HttpOnly","csrf_token":"AbCdEf123456","cookie_store":{}}}
```
**Response**:
```json
{"success":true,"valid":true,"message":"Interface name ZIF_TEST_001 is valid and available"}
```
---
## Step 3: Create Interface
**Tool**: `CreateInterfaceLow`
**Request**:
```json
{"interface_name":"ZIF_TEST_001","description":"Test interface","package_name":"ZOK_LAB","transport_request":"E19K905635","session_id":"a1b2c3d4e5f6789012345678901234567890abcd","session_state":{"cookies":"SAP_SESSIONID_E19_100=xyz123abc; Path=/; HttpOnly","csrf_token":"AbCdEf123456","cookie_store":{}}}
```
**Response**:
```json
{"success":true,"interface_name":"ZIF_TEST_001","uri":"/sap/bc/adt/oo/interfaces/zif_test_001","message":"Interface created successfully"}
```
---
## Step 4: Lock Interface
**Tool**: `LockInterfaceLow`
**Request**:
```json
{"interface_name":"ZIF_TEST_001","session_id":"a1b2c3d4e5f6789012345678901234567890abcd","session_state":{"cookies":"SAP_SESSIONID_E19_100=xyz123abc; Path=/; HttpOnly","csrf_token":"AbCdEf123456","cookie_store":{}}}
```
**Response**:
```json
{"success":true,"interface_name":"ZIF_TEST_001","lock_handle":"LOCK_HANDLE_123456789","message":"Interface locked successfully"}
```
---
## Step 5: Check Code BEFORE Update (CRITICAL)
**Tool**: `CheckInterfaceLow`
**Request**:
```json
{"interface_name":"ZIF_TEST_001","source_code":"INTERFACE zif_test_001\n PUBLIC.\n\n METHODS: get_value\n RETURNING VALUE(rv_result) TYPE string,\n set_value\n IMPORTING iv_value TYPE string.\n\nENDINTERFACE.","version":"inactive","session_id":"a1b2c3d4e5f6789012345678901234567890abcd","session_state":{"cookies":"SAP_SESSIONID_E19_100=xyz123abc; Path=/; HttpOnly","csrf_token":"AbCdEf123456","cookie_store":{}}}
```
**Response** (Passed):
```json
{"success":true,"checked":true,"messages":[],"errors":[],"warnings":[],"message":"Syntax check passed"}
```
---
## Step 6: Update Interface (Only if Check Passed)
**Tool**: `UpdateInterfaceLow`
**Request**:
```json
{"interface_name":"ZIF_TEST_001","source_code":"INTERFACE zif_test_001\n PUBLIC.\n\n METHODS: get_value\n RETURNING VALUE(rv_result) TYPE string,\n set_value\n IMPORTING iv_value TYPE string.\n\nENDINTERFACE.","lock_handle":"LOCK_HANDLE_123456789","session_id":"a1b2c3d4e5f6789012345678901234567890abcd","session_state":{"cookies":"SAP_SESSIONID_E19_100=xyz123abc; Path=/; HttpOnly","csrf_token":"AbCdEf123456","cookie_store":{}}}
```
**Response**:
```json
{"success":true,"interface_name":"ZIF_TEST_001","message":"Interface updated successfully"}
```
---
## Step 7: Unlock Interface
**Tool**: `UnlockInterfaceLow`
**Request**:
```json
{"interface_name":"ZIF_TEST_001","lock_handle":"LOCK_HANDLE_123456789","session_id":"a1b2c3d4e5f6789012345678901234567890abcd","session_state":{"cookies":"SAP_SESSIONID_E19_100=xyz123abc; Path=/; HttpOnly","csrf_token":"AbCdEf123456","cookie_store":{}}}
```
**Response**:
```json
{"success":true,"interface_name":"ZIF_TEST_001","message":"Interface unlocked successfully"}
```
---
## Step 8: Check Inactive Version
**Tool**: `CheckInterfaceLow`
**Request**:
```json
{"interface_name":"ZIF_TEST_001","version":"inactive","session_id":"a1b2c3d4e5f6789012345678901234567890abcd","session_state":{"cookies":"SAP_SESSIONID_E19_100=xyz123abc; Path=/; HttpOnly","csrf_token":"AbCdEf123456","cookie_store":{}}}
```
**Response**:
```json
{"success":true,"checked":true,"messages":[],"errors":[],"warnings":[],"message":"Syntax check passed"}
```
---
## Step 9: Activate Interface
**Option A: Individual**
**Tool**: `ActivateInterfaceLow`
**Request**:
```json
{"interface_name":"ZIF_TEST_001","session_id":"a1b2c3d4e5f6789012345678901234567890abcd","session_state":{"cookies":"SAP_SESSIONID_E19_100=xyz123abc; Path=/; HttpOnly","csrf_token":"AbCdEf123456","cookie_store":{}}}
```
**Response**:
```json
{"success":true,"interface_name":"ZIF_TEST_001","activation":{"activated":true,"checked":true,"generated":false},"messages":[],"warnings":[],"errors":[],"message":"Interface activated successfully"}
```
**Option B: Group Activation**
**Tool**: `ActivateObjectLow`
**Request**:
```json
{"objects":[{"name":"ZIF_TEST_001","type":"INTF/OI"},{"name":"ZCL_TEST_001","type":"CLAS/OC"}],"preaudit":true}
```
**Response**:
```json
{"success":true,"objects_count":2,"objects":[{"name":"ZIF_TEST_001","type":"INTF/OI","uri":"/sap/bc/adt/oo/interfaces/zif_test_001"},{"name":"ZCL_TEST_001","type":"CLAS/OC","uri":"/sap/bc/adt/oo/classes/zcl_test_001"}],"activation":{"activated":true,"checked":true,"generated":false},"messages":[],"warnings":[],"errors":[],"message":"Successfully activated 2 object(s)"}
```
