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loyalty-agent-service/docs/specs/reward_campaign/external_transaction_code.md

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---
title: "External Transaction Code"
type: OpenSpec
status: Draft
domain: Reward Campaign Management
---
# External Transaction Code
## Requirement Definition
Maps incoming transaction codes from external systems (e.g., Card System) to OLS Transaction Codes.
## Process Flow
### Pre-Conditions
- Users must have access rights in the module.
## Business Rules
### Data Schema
| Field Name | Description | Logic Type | Constraints / Rules |
|---|---|---|---|
| External Transaction Code | Source System Transaction Code. | String (10) | Required. |
| Description | Description for reference. | String (30) | Required. |
### Execution
- An External System TC is the first key used to locate the corresponding OLS TC for processing.
- Each External TC must be mapped to an OLS TC.
- Supports Maker-Checker approval workflow (Pending -> Active).
## Exception Flow
- N/A