# Sub-Volume A: Global Atomic Settlements (GAS) Network

## Overview

The Global Atomic Settlements (GAS) Network enables **instant, irreversible, atomic settlement** across multiple financial dimensions:

- Classical financial networks
- CBDC chains
- Commodity token networks
- Security token systems
- Quantum financial rails
- Multiversal DBIS layers

## Architecture

### Multi-Dimensional Atomic Settlement

GAS extends the existing atomic settlement service to support multi-dimensional commit verification:

```
atomic_settlement = HASH(
   scb_commit,
   dbis_commit,
   fx_commit,
   asset_commit,
   temporal_state
)
```

Settlement is only final when **all commits match** across dimensions.

### Smart Routing

GAS uses a hybrid routing approach combining:

- **SIRE** (Sovereign Interoperability Routing Engine) - Cost and risk optimization
- **CASO** (Cross-Border Algorithmic Settlement Optimizer) - Cross-border route optimization
- **ARIFX** (Future module) - Advanced routing for interplanetary and multiversal transactions

Routing optimization considers:
- Cost (FX, liquidity, risk)
- Latency (settlement time)
- Dimensional alignment (cross-reality consistency)

## Services

### GasSettlementService

Main service for executing GAS atomic settlements.

**Location**: `src/core/settlement/gas/gas-settlement.service.ts`

**Key Methods**:
- `executeGasSettlement()` - Execute multi-dimensional atomic settlement
- `getGasSettlement()` - Get settlement by ID
- `getGasSettlementsForBank()` - Get settlements for a bank
- `isSettlementAtomicAndVerified()` - Verify settlement is atomic and all commits matched

### GasCommitmentService

Service for creating and verifying multi-dimensional commitments.

**Location**: `src/core/settlement/gas/gas-commitment.service.ts`

**Key Methods**:
- `createMultiDimensionalCommitment()` - Create commits across all dimensions
- `verifyAllCommitsMatch()` - Verify all commits match
- `getCommitment()` - Get commitment by settlement ID

### GasRoutingService

Service for smart routing using SIRE + CASO + ARIFX.

**Location**: `src/core/settlement/gas/gas-routing.service.ts`

**Key Methods**:
- `calculateOptimalRoute()` - Calculate optimal route using hybrid routing
- `getRoutingHistory()` - Get routing history

## API Endpoints

### Settlement

- `POST /api/gas/settle` - Execute GAS atomic settlement
- `GET /api/gas/settlement/:gasSettlementId` - Get settlement by ID
- `GET /api/gas/settlements/bank/:sovereignBankId` - Get settlements for a bank
- `GET /api/gas/settlements/network/:networkType` - Get settlements by network type

### Routing

- `POST /api/gas/route` - Calculate optimal route
- `GET /api/gas/routing/history` - Get routing history

### Commitment

- `GET /api/gas/commitment/:settlementId` - Get commitment by settlement ID
- `POST /api/gas/commitment/verify` - Verify all commits match

## Database Schema

### GasSettlement

Main settlement record for GAS transactions.

**Fields**:
- `gasSettlementId` - Unique GAS settlement identifier
- `settlementId` - Reference to AtomicSettlement
- `networkType` - Network type (classical, cbdc, commodity, security, quantum, multiversal)
- `commitmentHash` - Hash of all commitments
- `dimensionalAlignment` - Dimensional alignment score
- `allCommitsMatched` - Whether all commits matched

### GasCommitment

Multi-dimensional commitment record.

**Fields**:
- `scbCommit` - SCB ledger commit hash
- `dbisCommit` - DBIS master ledger commit hash
- `fxCommit` - FX commit hash (optional)
- `assetCommit` - Asset commit hash (optional)
- `temporalState` - Temporal state commit (optional)
- `commitmentHash` - Combined hash of all commits

### GasRoutingDecision

Routing decision record.

**Fields**:
- `routingEngine` - Engine used (sire, caso, arifx, hybrid)
- `optimalRoute` - Calculated optimal route
- `cost` - Total route cost
- `latency` - Estimated latency in milliseconds
- `dimensionalAlignment` - Dimensional alignment score

## Integration Points

- **Atomic Settlement Service**: Extends `src/core/settlement/isn/atomic-settlement.service.ts`
- **SIRE**: Integrates with `src/core/settlement/sire/sire-routing.service.ts`
- **CASO**: Integrates with `src/core/settlement/caso/caso-routing.service.ts`
- **ARIFX**: Placeholder for future module

## Use Cases

### Real-Time Interbank Transactions

Instant settlement between sovereign central banks using classical financial networks.

### Interplanetary CBDC Settlement

Settlement across planetary systems (Earth, Luna, Mars) with temporal state tracking.

### Multi-Asset Instantaneous Swaps

Atomic swaps across multiple asset types (currency, CBDC, commodity, security).

### Synthetic Derivative Execution

Instant execution of synthetic derivatives with multi-dimensional commit verification.

## Example Usage

```typescript
import { gasSettlementService } from '@/core/settlement/gas/gas-settlement.service';

// Execute GAS settlement
const result = await gasSettlementService.executeGasSettlement({
  sourceBankId: 'OMNL',
  destinationBankId: 'USCB',
  amount: 1000000,
  currencyCode: 'USD',
  assetType: 'currency',
  networkType: 'classical',
  optimizeFor: 'cost',
});

console.log(`Settlement ID: ${result.gasSettlementId}`);
console.log(`All commits matched: ${result.allCommitsMatched}`);
```

## Status

✅ **Implemented** - Sub-Volume A is fully implemented and integrated with existing DBIS systems.