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+```markdown
+# REQ-20260402-001: Issue - 001 Specification
+## Overview
+The purpose of this requirement is to address the issue reported in the integrated-wallet repository, specifically issue #10.
+
+## Affected Product Area
+The affected product area is the wallet's transaction processing system.
+
+## Target User or System Behavior
+The target user is the end-user of the integrated wallet, and the system behavior is the successful processing of transactions.
+
+## In-Scope Boundaries
+- The requirement is limited to the transaction processing system.
+- The requirement only applies to the main branch of the repository.
+
+## Out-of-Scope Boundaries
+- The requirement does not include any changes to the user interface.
+- The requirement does not include any changes to the database schema.
+
+## Intended Functional Behavior
+The intended functional behavior is to fix the bug that prevents transactions from being processed correctly.
+
+## User or System Workflows
+1. The user initiates a transaction.
+2. The system processes the transaction.
+3. The system updates the user's account balance.
+
+## Dependencies
+- The system relies on a third-party API for transaction processing.
+
+## Constraints
+- The system must comply with relevant financial regulations.
+
+## Edge Cases
+- The system must handle cases where the user's account balance is insufficient for the transaction.
+- The system must handle cases where the third-party API is unavailable.
+
+## Repository, Branch, Environment, or Technical Assumptions
+- The requirement assumes that the repository is https://api.github.com/repos/ChunhuoQ/integrated-wallet.
+- The requirement assumes that the branch is main.
+- The requirement assumes that the environment is a standard development environment.
+
+## Reproduction Steps
+1. Clone the repository.
+2. Checkout the main branch.
+3. Run the application.
+4. Initiate a transaction.
+5. Verify that the transaction is processed correctly.
+
+## Reference Documentation
+- [API Documentation](https://api.github.com/repos/ChunhuoQ/integrated-wallet)
+- [User Manual](https://github.com/ChunhuoQ/integrated-wallet/blob/main/README.md)
+
+## Acceptance Criteria
+- The system processes transactions correctly.
+- The system updates the user's account balance correctly.
+- The system handles edge cases correctly.
+```
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