# Global Quantum Ledger (GQL)

## Overview

The Global Quantum Ledger (GQL) is the next-generation DBIS ledger designed for post-quantum and quantum-accelerated settlement.

## Quantum-Resistant Structures

- XMSS / SPHINCS+ state proofs
- PQ-signature blocks
- Quantum hashing (Q-Keccak)

## Block Structure

```
GQL_Block = {
  block_id: UUID,
  timestamp: UTC,
  pq_signatures: [...],
  quantum_state_commit: ENTANGLED_HASH,
  multi_asset_root: HASH(cbdc, fiat, ssu, commodity, security),
  previous_block_hash: HASH256
}
```

## Multi-Asset Integration

GQL natively supports:
- CBDC
- Fiat
- Commodity tokens
- Security tokens
- SSUs (Synthetic Settlement Units)
- Future quantum-native financial instruments

## API Endpoints

- `POST /api/v1/gql/blocks` - Create GQL block
- `GET /api/v1/gql/blocks/:blockId` - Get GQL block
- `POST /api/v1/gql/signatures` - Create PQ signature block