Implement Transaction Batching & Settlement Optimization

[akargi]

Overview

Create a transaction batching system that groups multiple trades for efficient settlement on the Stellar blockchain, reducing transaction fees and improving throughput.

Description

Current implementation may execute individual transactions on-chain. This feature batches multiple trades and operations together to optimize blockchain utilization and reduce costs.

Requirements

• Batch window configuration (time-based and size-based)
• Automatic batching of compatible transactions
• Settlement optimization with net settlement support
• Atomic batch execution with rollback capability
• Fee optimization calculations
• Batch status tracking and reporting
• Manual batch trigger option for urgent settlements
• Batch composition validation
• Settlement transaction finalization and confirmation
• Batch history and audit trail

Acceptance Criteria

• Batch entity and workflow models created
• Time-based batching: groups trades every 30 seconds
• Size-based batching: triggers at 50 transactions or 30 seconds, whichever first
• POST /api/transactions/batch endpoint for manual batch trigger
• GET /api/transactions/batches/:id returns batch details and status
• Net settlement reduces total transactions by minimum 30% vs individual settlement
• Atomic execution: all batch transactions succeed or none execute
• Fee reduction analysis: batching reduces per-transaction fees by >20%
• Unit tests for batching logic (>85% coverage)
• E2E tests validate end-to-end settlement workflow
• Batch processing latency <2 seconds