dbis_docs/gru_reserve_system/appendices/Appendix_B_API_Specifications.md

APPENDIX B: API SPECIFICATIONS

Complete API Documentation for GRU Reserve System

Document Number: DBIS-GRU-APP-B
Version: 1.0
Date: [Enter date in ISO 8601 format: YYYY-MM-DD]
Classification: CONFIDENTIAL
Authority: DBIS Technical Department

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PREAMBLE

This appendix provides complete API specifications for the GRU Reserve System, including REST API endpoints, request/response formats, authentication, and error handling.

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PART I: API OVERVIEW

Section 1.1: API Architecture

API Type: RESTful API

Base URL: https://api.dbis.org/v1/reserve

API Versioning:

• Current version: v1
• Version specified in URL path
• Backward compatibility maintained for at least 2 versions

Authentication:

• OAuth 2.0 with JWT tokens
• API keys for service-to-service communication
• Certificate-based authentication for high-security operations

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PART II: RESERVE MANAGEMENT APIs

Section 2.1: Get Reserve Status

Endpoint: GET /reserve/status

Authentication: Required (API key or OAuth token)

Request:

GET /v1/reserve/status
Headers:
  Authorization: Bearer {token}
  Accept: application/json

Response:

{
  "status": "success",
  "data": {
    "total_reserves": 34500000.00,
    "currency": "USD",
    "reserve_ratio": 1.15,
    "minimum_required": 30000000.00,
    "assets": [
      {
        "type": "XAU",
        "quantity": 10000.0,
        "unit": "oz",
        "value": 20000000.00,
        "weight": 1.0
      },
      {
        "type": "BTC",
        "quantity": 100.0,
        "unit": "BTC",
        "value": 5000000.00,
        "weight": 0.9
      }
    ],
    "liabilities": {
      "total": 30000000.00,
      "currency": "USD"
    },
    "timestamp": "2024-01-15T10:30:00Z"
  }
}

Error Responses:

• 401 Unauthorized: Invalid or missing authentication
• 403 Forbidden: Insufficient permissions
• 500 Internal Server Error: Server error

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Section 2.2: Get Asset Details

Endpoint: GET /reserve/assets/{asset_type}

Parameters:

• asset_type: Asset type (XAU, BTC, ETH, etc.)

Response:

{
  "status": "success",
  "data": {
    "asset_type": "XAU",
    "quantity": 10000.0,
    "unit": "oz",
    "current_price": 2000.00,
    "value": 20000000.00,
    "location": "allocated",
    "purity": 0.9999,
    "last_updated": "2024-01-15T10:30:00Z"
  }
}

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PART III: CONVERSION APIs

Section 3.1: Request Conversion

Endpoint: POST /reserve/convert

Request:

{
  "source_asset": "USD",
  "target_asset": "XAU",
  "amount": 100000.00,
  "source_unit": "USD",
  "target_unit": "oz"
}

Response:

{
  "status": "success",
  "data": {
    "conversion_id": "CONV-2024-001-12345",
    "source_asset": "USD",
    "target_asset": "XAU",
    "source_amount": 100000.00,
    "target_amount": 50.0,
    "conversion_rate": 2000.00,
    "fees": {
      "base_fee": 0.1,
      "slippage_fee": 0.0,
      "large_transaction_fee": 0.05,
      "total_fee": 0.15,
      "fee_amount": 0.075
    },
    "path": "direct",
    "estimated_settlement": "2024-01-15T10:35:00Z",
    "status": "pending"
  }
}

Error Responses:

• 400 Bad Request: Invalid request parameters
• 402 Payment Required: Insufficient reserves
• 429 Too Many Requests: Rate limit exceeded

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Section 3.2: Get Conversion Status

Endpoint: GET /reserve/convert/{conversion_id}

Response:

{
  "status": "success",
  "data": {
    "conversion_id": "CONV-2024-001-12345",
    "status": "completed",
    "source_asset": "USD",
    "target_asset": "XAU",
    "source_amount": 100000.00,
    "target_amount": 50.0,
    "actual_rate": 2000.00,
    "fees": {
      "total_fee": 0.15,
      "fee_amount": 0.075
    },
    "settled_at": "2024-01-15T10:35:00Z",
    "transaction_hash": "0x1234..."
  }
}

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PART IV: BOND SYSTEM APIs

Section 4.1: Issue Bonds

Endpoint: POST /reserve/bonds/issue

Request:

{
  "amount": 1000000.00,
  "currency": "USD",
  "maturity_years": 5,
  "interest_rate": 0.03,
  "backing_assets": ["XAU"]
}

Response:

{
  "status": "success",
  "data": {
    "bond_id": "BOND-2024-001",
    "face_value": 1000000.00,
    "currency": "USD",
    "maturity_date": "2029-01-15",
    "interest_rate": 0.03,
    "issue_date": "2024-01-15",
    "backing_assets": ["XAU"],
    "backing_value": 1250000.00,
    "coverage_ratio": 1.25
  }
}

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Section 4.2: Redeem Bonds

Endpoint: POST /reserve/bonds/{bond_id}/redeem

Request:

{
  "redemption_amount": 1000000.00,
  "redemption_date": "2024-01-15"
}

Response:

{
  "status": "success",
  "data": {
    "bond_id": "BOND-2024-001",
    "redemption_amount": 1000000.00,
    "accrued_interest": 25000.00,
    "total_redemption": 1025000.00,
    "redemption_date": "2024-01-15",
    "settlement_assets": ["XAU"],
    "settlement_amount": 512.5
  }
}

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PART V: AUTHENTICATION AND SECURITY

Section 5.1: Authentication

OAuth 2.0 Flow:

1. Client requests authorization
2. User authorizes
3. Authorization server issues access token
4. Client uses access token for API requests
5. Token refresh as needed

API Key Authentication:

• API keys issued by DBIS
• Keys rotated every 90 days
• Keys stored securely (never in code)

Certificate Authentication:

• X.509 certificates for high-security operations
• Certificate validation required
• Mutual TLS (mTLS) for certificate-based authentication

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Section 5.2: Rate Limiting

Rate Limits:

• Standard API key: 100 requests per minute
• OAuth token: 1000 requests per minute
• Certificate-based: 10000 requests per minute

Rate Limit Headers:

X-RateLimit-Limit: 100
X-RateLimit-Remaining: 95
X-RateLimit-Reset: 1642248000

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PART VI: ERROR HANDLING

Section 6.1: Error Response Format

Standard Error Response:

{
  "status": "error",
  "error": {
    "code": "RESERVE_INSUFFICIENT",
    "message": "Insufficient reserves for requested conversion",
    "details": {
      "required": 100000.00,
      "available": 50000.00
    },
    "timestamp": "2024-01-15T10:30:00Z",
    "request_id": "REQ-2024-001-12345"
  }
}

Error Codes:

• AUTH_REQUIRED: Authentication required
• AUTH_INVALID: Invalid authentication
• PERMISSION_DENIED: Insufficient permissions
• INVALID_REQUEST: Invalid request parameters
• RESERVE_INSUFFICIENT: Insufficient reserves
• CONVERSION_FAILED: Conversion failed
• RATE_LIMIT_EXCEEDED: Rate limit exceeded
• SERVER_ERROR: Internal server error

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PART VII: WEBHOOKS AND NOTIFICATIONS

Section 7.1: Webhook Events

Event Types:

• conversion.completed: Conversion completed
• conversion.failed: Conversion failed
• bond.issued: Bond issued
• bond.redeemed: Bond redeemed
• reserve.threshold: Reserve threshold reached

Webhook Payload:

{
  "event": "conversion.completed",
  "timestamp": "2024-01-15T10:35:00Z",
  "data": {
    "conversion_id": "CONV-2024-001-12345",
    "status": "completed"
  }
}

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IMPLEMENTATION NOTES

• All APIs use HTTPS only (TLS 1.3)
• All requests and responses are JSON
• All timestamps in ISO 8601 format
• All monetary amounts in base currency (USD) unless specified
• API versioning in URL path
• Comprehensive error handling
• Rate limiting implemented
• Audit logging for all API calls

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END OF APPENDIX B