Xero Accounting & CFO Assistant Agent - Technical Specification

1. Introduction

1.1 Purpose

This technical specification document provides detailed requirements and implementation guidelines for the Xero Accounting & CFO Assistant Agent. It serves as a comprehensive reference for developers implementing the system.

1.2 Scope

This document covers the technical aspects of the Xero Agent, including system architecture, API specifications, data models, integration requirements, and implementation details.

1.3 Intended Audience

Software developers implementing the system
System architects and designers
QA engineers testing the system
Project managers overseeing development

1.4 References

Xero API Documentation
n8n Documentation
Replit Deployment Guidelines
OAuth 2.0 Specification

2. System Overview

2.1 System Description

The Xero Accounting & CFO Assistant Agent is a comprehensive wrapper around the Xero API that provides both day-to-day bookkeeping functionality and higher-level financial analysis capabilities. The system integrates with n8n for workflow automation and is deployed on Replit.

2.2 System Context

┌─────────────────────────────────────────────────────────────────┐
│                      External Environment                        │
│                                                                 │
│  ┌─────────────┐      ┌───────────────────────┐     ┌────────┐  │
│  │  End Users  │      │  Xero API             │     │  n8n   │  │
│  └─────┬───────┘      └───────────┬───────────┘     └────┬───┘  │
│        │                          │                      │      │
└────────┼──────────────────────────┼──────────────────────┼──────┘
         │                          │                      │
         ▼                          ▼                      ▼
┌────────────────────────────────────────────────────────────────┐
│                      Xero Agent System                          │
│                                                                │
│  ┌─────────────┐      ┌───────────────────────┐     ┌────────┐ │
│  │  Web UI     │      │  Backend Services     │     │ API    │ │
│  └─────────────┘      └───────────────────────┘     └────────┘ │
│                                                                │
└────────────────────────────────────────────────────────────────┘

2.3 System Goals

Provide a complete wrapper around the Xero API
Automate bookkeeping tasks
Deliver CFO-level financial analysis
Integrate with n8n for workflow automation
Support multi-user access with role-based permissions
Ensure secure and reliable operation

3. Functional Requirements

3.1 Xero API Wrapper

3.1.1 Contacts Management

Create, read, update, and delete contacts
Search and filter contacts
Manage contact groups
Handle contact history

3.1.2 Accounts Management

Retrieve and update chart of accounts
Manage account codes and tax rates
Track account balances
Handle account history

3.1.3 Invoices and Bills

Create, approve, edit, and void sales invoices
Create, approve, edit, and void purchase bills
Support line items, due dates, and tax calculations
Send invoices via email
Attach files and PDFs to invoices
Track invoice and bill status

3.1.4 Credit Notes

Create and apply credit notes to invoices
Manage credit note allocations
Track credit note history

3.1.5 Payments

Apply payments to invoices and bills
Handle overpayments and prepayments
Track payment history
Reconcile payments with bank transactions

3.1.6 Bank Transactions

Create "spend money" or "receive money" transactions
Categorize transactions
Reconcile transactions with bank statements
Track transaction history

3.1.7 Bank Transfers

Record transfers between bank accounts
Track transfer history
Reconcile transfers with bank statements

3.1.8 Expense Claims

Submit expense claims
Attach receipt images
Track expense claim status
Approve or reject expense claims

3.1.9 Manual Journals

Create journal entries for adjustments
Support multi-line journals
Track journal history

3.1.10 Reports

Fetch financial reports (Balance Sheet, P&L, Trial Balance, etc.)
Parse reports into usable data structures
Generate custom reports
Export reports in various formats

3.1.11 Budgets

Retrieve budget data
Compare actuals vs budgets
Track budget variances

3.1.12 Users & Organization Info

Fetch organization details
Retrieve user list
Manage user permissions

3.1.13 Attachments

Upload attachments for records
Download attachments
Manage attachment metadata

3.2 Bookkeeping Automation

3.2.1 Bank Reconciliation Automation

Retrieve unreconciled bank statement lines
Match transactions with invoices and bills
Create payment records for matches
Flag unmatched transactions for review
Generate reconciliation reports

3.2.2 Transaction Categorization

Apply rules for transaction categorization
Use machine learning for category prediction
Learn from user corrections
Manage categorization rules
Provide category suggestions

3.2.3 Invoicing Automation

Generate invoices based on templates
Schedule recurring invoices
Send invoices to customers
Track invoice status
Send payment reminders

3.2.4 Bill Processing

Extract data from bill images or PDFs
Create bill records in Xero
Schedule payments based on due dates
Track bill status
Manage supplier information

3.2.5 Payments and Collections

Send payment reminders for overdue invoices
Track payment status
Generate payment reports
Forecast cash collections

3.2.6 Period Close Assistance

Verify all accounts are reconciled
Check for unprocessed transactions
Generate draft financial statements
Provide period close checklist

3.3 Financial Analysis

3.3.1 Financial Reporting

Generate key financial reports
Calculate financial metrics
Provide period-over-period comparisons
Visualize financial data
Export reports in various formats

3.3.2 Cash Flow Forecasting

Project short-term cash flow based on AR/AP
Generate long-term forecasts using historical data
Support scenario planning
Identify potential cash shortfalls
Provide cash flow recommendations

3.3.3 Budget Analysis

Compare actuals to budget
Calculate variances
Identify trends
Provide budget recommendations
Generate variance reports

3.3.4 KPI Dashboard

Calculate key financial metrics
Track metric changes over time
Generate alerts for significant changes
Provide customizable dashboard views
Support drill-down for detailed analysis

3.3.5 Anomaly Detection

Analyze financial data for unusual patterns
Identify potential errors or fraud
Generate alerts for significant anomalies
Provide explanations and recommendations
Track resolution of anomalies

3.4 n8n Integration

3.4.1 API Endpoints

Expose endpoints for n8n to trigger actions
Support authentication for n8n requests
Provide comprehensive error handling
Document API for n8n integration

3.4.2 Webhooks

Send webhooks to n8n for events
Support webhook configuration
Provide webhook security
Track webhook delivery status

3.4.3 Workflow Templates

Provide pre-built workflow templates
Support custom workflow creation
Document workflow configuration
Provide examples for common scenarios

3.5 User Management

3.5.1 User Authentication

Support email/password authentication
Implement OAuth 2.0 for Xero
Manage user sessions
Handle password reset and recovery

3.5.2 Role-Based Access Control

Define user roles (Admin, Standard, Read-Only, etc.)
Manage permissions for each role
Control access to features and data
Support custom role creation

3.5.3 Multi-Tenant Support

Support multiple Xero organizations
Manage tenant connections
Control user access to tenants
Support tenant switching

4. Non-Functional Requirements

4.1 Performance Requirements

API response time < 2 seconds for 95% of requests
Support for at least 100 concurrent users
Handle organizations with up to 10,000 transactions
Generate reports in < 10 seconds
Support batch operations for up to 100 items

4.2 Security Requirements

Secure authentication using industry standards
Encryption of sensitive data at rest and in transit
Role-based access control
Audit logging for security events
Protection against common web vulnerabilities

4.3 Reliability Requirements

System availability of 99.9% during business hours
Graceful handling of Xero API outages
Automatic recovery from temporary failures
Data backup and recovery mechanisms
Comprehensive error handling and logging

4.4 Scalability Requirements

Support for growing transaction volumes
Ability to handle increasing user load
Efficient use of Replit resources
Caching for frequently accessed data
Optimized database queries

4.5 Usability Requirements

Intuitive user interface
Responsive design for mobile and desktop
Clear error messages and notifications
Comprehensive help documentation
Accessibility compliance

4.6 Compatibility Requirements

Support for modern web browsers
Compatibility with Xero API versions
Integration with n8n versions
Support for various export formats (PDF, CSV, Excel)

5. System Architecture

5.1 High-Level Architecture

┌─────────────────────────────────────────────────────────────────┐
│                      Xero Agent Application                      │
├─────────────┬─────────────────────────────┬─────────────────────┤
│  Frontend   │        Backend Core         │  Integration Layer   │
│  (Web UI)   │                             │                      │
├─────────────┼─────────────────────────────┼─────────────────────┤
│ - Dashboard │ - Authentication Module     │ - Xero API Wrapper   │
│ - User      │ - User Management           │ - n8n Integration    │
│   Management│ - Data Processing           │ - Webhook Handlers   │
│ - Reports   │ - Business Logic            │                      │
│ - Settings  │ - Database Access           │                      │
└─────────────┴─────────────────────────────┴─────────────────────┘
       ▲                   ▲                         ▲
       │                   │                         │
       ▼                   ▼                         ▼
┌─────────────┐   ┌─────────────────────┐   ┌─────────────────────┐
│  Database   │   │     n8n Workflows   │   │     Xero API        │
└─────────────┘   └─────────────────────┘   └─────────────────────┘

5.2 Component Architecture

5.2.1 Frontend Components

React.js components for UI
Redux or Context API for state management
Material-UI or Tailwind CSS for styling
Chart.js or D3.js for data visualization
Formik with Yup for form handling

5.2.2 Backend Components

Express.js for API endpoints
Passport.js for authentication
Sequelize or Prisma for database access
Winston for logging
Joi for validation

5.2.3 Integration Components

Xero Node.js SDK for API access
Axios for HTTP requests
JWT for API authentication
Webhook handlers for events
n8n integration modules

5.3 Data Flow Architecture

5.3.1 Authentication Flow

┌──────────┐     ┌───────────────┐     ┌──────────────┐
│  User    │     │  Xero Agent   │     │  Xero API    │
└────┬─────┘     └───────┬───────┘     └──────┬───────┘
     │                   │                    │
     │    Login          │                    │
     │─────────────────>│                    │
     │                   │                    │
     │                   │  OAuth2 Request    │
     │                   │───────────────────>│
     │                   │                    │
     │ Redirect to Xero  │                    │
     │<──────────────────│                    │
     │                   │                    │
     │ Authorize App     │                    │
     │────────────────────────────────────────>
     │                   │                    │
     │ Auth Code         │                    │
     │<────────────────────────────────────────
     │                   │                    │
     │ Submit Auth Code  │                    │
     │─────────────────>│                    │
     │                   │  Exchange Code     │
     │                   │───────────────────>│
     │                   │                    │
     │                   │  Access Token      │
     │                   │<───────────────────│
     │                   │                    │
     │ Authentication    │                    │
     │ Complete          │                    │
     │<──────────────────│                    │

5.3.2 API Request Flow

┌──────────┐     ┌───────────────┐     ┌──────────────┐
│  Client  │     │  Xero Agent   │     │  Xero API    │
└────┬─────┘     └───────┬───────┘     └──────┬───────┘
     │                   │                    │
     │ API Request       │                    │
     │ with JWT Token    │                    │
     │─────────────────>│                    │
     │                   │                    │
     │                   │ Validate Token     │
     │                   │─────┐              │
     │                   │<────┘              │
     │                   │                    │
     │                   │ Process Request    │
     │                   │─────┐              │
     │                   │<────┘              │
     │                   │                    │
     │                   │ Xero API Request   │
     │                   │ with Access Token  │
     │                   │───────────────────>│
     │                   │                    │
     │                   │ API Response       │
     │                   │<───────────────────│
     │                   │                    │
     │                   │ Process Response   │
     │                   │─────┐              │
     │                   │<────┘              │
     │                   │                    │
     │ API Response      │                    │
     │<──────────────────│                    │

5.3.3 Webhook Flow

┌──────────┐     ┌───────────────┐     ┌──────────────┐
│  n8n     │     │  Xero Agent   │     │  Xero API    │
└────┬─────┘     └───────┬───────┘     └──────┬───────┘
     │                   │                    │
     │                   │                    │
     │                   │ Event Occurs       │
     │                   │<───────────────────│
     │                   │                    │
     │                   │ Process Event      │
     │                   │─────┐              │
     │                   │<────┘              │
     │                   │                    │
     │ Webhook Event     │                    │
     │<──────────────────│                    │
     │                   │                    │
     │ Process Webhook   │                    │
     │─────┐             │                    │
     │<────┘             │                    │
     │                   │                    │
     │ Webhook Response  │                    │
     │─────────────────>│                    │
     │                   │                    │

6. Database Design

6.1 Entity Relationship Diagram

┌───────────────┐       ┌───────────────┐       ┌───────────────┐
│     User      │       │  XeroTenant   │       │   XeroToken   │
├───────────────┤       ├───────────────┤       ├───────────────┤
│ id            │       │ id            │       │ id            │
│ email         │       │ tenantId      │       │ userId        │
│ passwordHash  │       │ tenantName    │       │ tenantId      │
│ firstName     │       │ tenantType    │       │ accessToken   │
│ lastName      │       │ createdAt     │       │ refreshToken  │
│ role          │       │ updatedAt     │       │ expiresAt     │
│ createdAt     │       └───────┬───────┘       │ createdAt     │
│ updatedAt     │               │               │ updatedAt     │
└───────┬───────┘               │               └───────┬───────┘
        │                       │                       │
        │                       │                       │
        │                       │                       │
        │                       ▼                       │
        │               ┌───────────────┐               │
        └───────────────► UserTenant    ◄───────────────┘
                        ├───────────────┤
                        │ id            │
                        │ userId        │
                        │ tenantId      │
                        │ isActive      │
                        │ createdAt     │
                        │ updatedAt     │
                        └───────────────┘
                                │
                                │
                                ▼
┌───────────────┐       ┌───────────────┐       ┌───────────────┐
│ CategoryRule  │       │ Transaction   │       │ Report        │
├───────────────┤       ├───────────────┤       ├───────────────┤
│ id            │       │ id            │       │ id            │
│ userId        │       │ tenantId      │       │ tenantId      │
│ tenantId      │       │ xeroId        │       │ userId        │
│ pattern       │       │ type          │       │ type          │
│ category      │       │ amount        │       │ name          │
│ priority      │       │ date          │       │ data          │
│ createdAt     │       │ category      │       │ createdAt     │
│ updatedAt     │       │ createdAt     │       │ updatedAt     │
└───────────────┘       └───────────────┘       └───────────────┘

6.2 Table Definitions

6.2.1 User Table

Column	Type	Description
id	UUID	Primary key
email	VARCHAR(255)	User email (unique)
passwordHash	VARCHAR(255)	Bcrypt hashed password
firstName	VARCHAR(100)	User first name
lastName	VARCHAR(100)	User last name
role	VARCHAR(50)	User role (Admin, Standard, etc.)
createdAt	TIMESTAMP	Record creation time
updatedAt	TIMESTAMP	Record update time

6.2.2 XeroTenant Table

Column	Type	Description
id	UUID	Primary key
tenantId	VARCHAR(255)	Xero tenant ID
tenantName	VARCHAR(255)	Xero organization name
tenantType	VARCHAR(50)	Tenant type (Organization, Practice, etc.)
createdAt	TIMESTAMP	Record creation time
updatedAt	TIMESTAMP	Record update time

6.2.3 XeroToken Table

Column	Type	Description
id	UUID	Primary key
userId	UUID	Foreign key to User
tenantId	UUID	Foreign key to XeroTenant
accessToken	TEXT	Encrypted access token
refreshToken	TEXT	Encrypted refresh token
expiresAt	TIMESTAMP	Token expiration time
createdAt	TIMESTAMP	Record creation time
updatedAt	TIMESTAMP	Record update time

6.2.4 UserTenant Table

Column	Type	Description
id	UUID	Primary key
userId	UUID	Foreign key to User
tenantId	UUID	Foreign key to XeroTenant
isActive	BOOLEAN	Whether this is the active tenant for the user
createdAt	TIMESTAMP	Record creation time
updatedAt	TIMESTAMP	Record update time

6.2.5 CategoryRule Table

Column	Type	Description
id	UUID	Primary key
userId	UUID	Foreign key to User
tenantId	UUID	Foreign key to XeroTenant
pattern	VARCHAR(255)	Pattern to match for categorization
category	VARCHAR(100)	Category to assign
priority	INTEGER	Rule priority (higher takes precedence)
createdAt	TIMESTAMP	Record creation time
updatedAt	TIMESTAMP	Record update time

6.2.6 Transaction Table

Column	Type	Description
id	UUID	Primary key
tenantId	UUID	Foreign key to XeroTenant
xeroId	VARCHAR(255)	Xero transaction ID
type	VARCHAR(50)	Transaction type
amount	DECIMAL(19,4)	Transaction amount
date	DATE	Transaction date
category	VARCHAR(100)	Assigned category
createdAt	TIMESTAMP	Record creation time
updatedAt	TIMESTAMP	Record update time

6.2.7 Report Table

Column	Type	Description
id	UUID	Primary key
tenantId	UUID	Foreign key to XeroTenant
userId	UUID	Foreign key to User
type	VARCHAR(50)	Report type
name	VARCHAR(255)	Report name
data	JSON	Report data
createdAt	TIMESTAMP	Record creation time
updatedAt	TIMESTAMP	Record update time

6.3 Indexes and Constraints

6.3.1 Primary Keys

All tables have a UUID primary key

6.3.2 Foreign Keys

UserTenant.userId references User.id
UserTenant.tenantId references XeroTenant.id
XeroToken.userId references User.id
XeroToken.tenantId references XeroTenant.id
CategoryRule.userId references User.id
CategoryRule.tenantId references XeroTenant.id
Transaction.tenantId references XeroTenant.id
Report.tenantId references XeroTenant.id
Report.userId references User.id

6.3.3 Unique Constraints

User.email is unique
XeroTenant.tenantId is unique
Combination of UserTenant.userId and UserTenant.tenantId is unique
Combination of XeroToken.userId and XeroToken.tenantId is unique

6.3.4 Indexes

Index on User.email for login lookups
Index on XeroTenant.tenantId for Xero API operations
Index on Transaction.xeroId for synchronization
Index on Transaction.date for reporting
Index on CategoryRule.pattern for rule matching

7. API Specification

7.1 Authentication API

7.1.1 User Registration

Endpoint: POST /api/auth/register

Request Body:

{
  "email": "user@example.com",
  "password": "securePassword123",
  "firstName": "John",
  "lastName": "Doe"
}

Response:

{
  "success": true,
  "data": {
    "id": "550e8400-e29b-41d4-a716-446655440000",
    "email": "user@example.com",
    "firstName": "John",
    "lastName": "Doe",
    "role": "Standard",
    "createdAt": "2025-04-17T12:00:00Z"
  }
}

7.1.2 User Login

Endpoint: POST /api/auth/login

Request Body:

{
  "email": "user@example.com",
  "password": "securePassword123"
}

Response:

{
  "success": true,
  "data": {
    "token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...",
    "user": {
      "id": "550e8400-e29b-41d4-a716-446655440000",
      "email": "user@example.com",
      "firstName": "John",
      "lastName": "Doe",
      "role": "Standard"
    }
  }
}

7.1.3 Xero OAuth Authorization

Endpoint: GET /api/auth/xero
Response: Redirects to Xero authorization page

7.1.4 Xero OAuth Callback

Endpoint: GET /api/auth/xero/callback
Query Parameters: code, state
Response: Redirects to application with success/error

7.2 User Management API

7.2.1 Get Current User

Endpoint: GET /api/users/me
Headers: Authorization: Bearer {token}

Response:

{
  "success": true,
  "data": {
    "id": "550e8400-e29b-41d4-a716-446655440000",
    "email": "user@example.com",
    "firstName": "John",
    "lastName": "Doe",
    "role": "Standard",
    "tenants": [
      {
        "id": "660e8400-e29b-41d4-a716-446655440000",
        "tenantId": "xero-tenant-id",
        "tenantName": "Example Organization",
        "isActive": true
      }
    ]
  }
}

7.2.2 List Users (Admin only)

Endpoint: GET /api/users
Headers: Authorization: Bearer {token}

Response:

{
  "success": true,
  "data": [
    {
      "id": "550e8400-e29b-41d4-a716-446655440000",
      "email": "user@example.com",
      "firstName": "John",
      "lastName": "Doe",
      "role": "Standard",
      "createdAt": "2025-04-17T12:00:00Z"
    }
  ],
  "meta": {
    "page": 1,
    "pageSize": 20,
    "total": 1
  }
}

7.3 Xero Integration API

7.3.1 List Connected Tenants

Endpoint: GET /api/xero/tenants
Headers: Authorization: Bearer {token}

Response:

{
  "success": true,
  "data": [
    {
      "id": "660e8400-e29b-41d4-a716-446655440000",
      "tenantId": "xero-tenant-id",
      "tenantName": "Example Organization",
      "tenantType": "Organization",
      "isActive": true,
      "createdAt": "2025-04-17T12:00:00Z"
    }
  ]
}

7.3.2 Set Active Tenant

Endpoint: PUT /api/xero/tenants/active
Headers: Authorization: Bearer {token}

Request Body:

{
  "tenantId": "660e8400-e29b-41d4-a716-446655440000"
}

Response:

{
  "success": true,
  "data": {
    "id": "660e8400-e29b-41d4-a716-446655440000",
    "tenantId": "xero-tenant-id",
    "tenantName": "Example Organization",
    "tenantType": "Organization",
    "isActive": true
  }
}

7.4 Bookkeeping API

7.4.1 List Invoices

Endpoint: GET /api/bookkeeping/invoices
Headers: Authorization: Bearer {token}
Query Parameters: page, pageSize, status, dateFrom, dateTo

Response:

{
  "success": true,
  "data": [
    {
      "id": "770e8400-e29b-41d4-a716-446655440000",
      "invoiceNumber": "INV-0001",
      "contact": {
        "id": "880e8400-e29b-41d4-a716-446655440000",
        "name": "Example Customer"
      },
      "date": "2025-04-17",
      "dueDate": "2025-05-17",
      "status": "AUTHORISED",
      "total": 1000.00,
      "amountDue": 1000.00,
      "currency": "USD"
    }
  ],
  "meta": {
    "page": 1,
    "pageSize": 20,
    "total": 1
  }
}

7.4.2 Create Invoice

Endpoint: POST /api/bookkeeping/invoices
Headers: Authorization: Bearer {token}

Request Body:

{
  "contact": {
    "id": "880e8400-e29b-41d4-a716-446655440000"
  },
  "date": "2025-04-17",
  "dueDate": "2025-05-17",
  "lineItems": [
    {
      "description": "Consulting Services",
      "quantity": 10,
      "unitAmount": 100.00,
      "accountCode": "200",
      "taxType": "OUTPUT"
    }
  ]
}

Response:

{
  "success": true,
  "data": {
    "id": "770e8400-e29b-41d4-a716-446655440000",
    "invoiceNumber": "INV-0001",
    "contact": {
      "id": "880e8400-e29b-41d4-a716-446655440000",
      "name": "Example Customer"
    },
    "date": "2025-04-17",
    "dueDate": "2025-05-17",
    "status": "DRAFT",
    "total": 1000.00,
    "amountDue": 1000.00,
    "currency": "USD",
    "lineItems": [
      {
        "description": "Consulting Services",
        "quantity": 10,
        "unitAmount": 100.00,
        "accountCode": "200",
        "taxType": "OUTPUT",
        "lineAmount": 1000.00
      }
    ]
  }
}

7.5 Financial Analysis API

7.5.1 Get Cash Flow Forecast

Endpoint: GET /api/analysis/cash-flow-forecast
Headers: Authorization: Bearer {token}
Query Parameters: weeks, scenario

Response:

{
  "success": true,
  "data": {
    "currentBalance": 50000.00,
    "currency": "USD",
    "forecast": [
      {
        "week": "2025-04-21",
        "inflows": 10000.00,
        "outflows": 8000.00,
        "netFlow": 2000.00,
        "endingBalance": 52000.00
      },
      {
        "week": "2025-04-28",
        "inflows": 12000.00,
        "outflows": 9000.00,
        "netFlow": 3000.00,
        "endingBalance": 55000.00
      }
    ],
    "summary": {
      "totalInflows": 22000.00,
      "totalOutflows": 17000.00,
      "netFlow": 5000.00
    }
  }
}

7.5.2 Get KPI Dashboard

Endpoint: GET /api/analysis/kpi-dashboard
Headers: Authorization: Bearer {token}
Query Parameters: period

Response:

{
  "success": true,
  "data": {
    "period": "2025-04",
    "kpis": {
      "revenue": {
        "value": 50000.00,
        "change": 5.2,
        "trend": "up"
      },
      "expenses": {
        "value": 40000.00,
        "change": -2.1,
        "trend": "down"
      },
      "profit": {
        "value": 10000.00,
        "change": 12.5,
        "trend": "up"
      },
      "cashBalance": {
        "value": 55000.00,
        "change": 10.0,
        "trend": "up"
      },
      "accountsReceivable": {
        "value": 25000.00,
        "change": -5.0,
        "trend": "down"
      },
      "accountsPayable": {
        "value": 15000.00,
        "change": 3.0,
        "trend": "up"
      }
    }
  }
}

7.6 n8n Integration API

7.6.1 Trigger Bank Reconciliation

Endpoint: POST /api/n8n/reconcile
Headers: Authorization: Bearer {token}, X-API-Key: {apiKey}

Request Body:

{
  "accountId": "990e8400-e29b-41d4-a716-446655440000",
  "dateFrom": "2025-04-01",
  "dateTo": "2025-04-17"
}

Response:

{
  "success": true,
  "data": {
    "jobId": "job-123456",
    "status": "processing",
    "message": "Bank reconciliation started"
  }
}

7.6.2 Get Reconciliation Status

Endpoint: GET /api/n8n/reconcile/{jobId}
Headers: Authorization: Bearer {token}, X-API-Key: {apiKey}

Response:

{
  "success": true,
  "data": {
    "jobId": "job-123456",
    "status": "completed",
    "results": {
      "totalTransactions": 50,
      "matchedTransactions": 45,
      "unmatchedTransactions": 5
    }
  }
}

8. Implementation Guidelines

8.1 Technology Stack

8.1.1 Backend

Runtime: Node.js 16+
Framework: Express.js
Database: SQLite (dev), PostgreSQL (prod option)
ORM: Sequelize
Authentication: Passport.js, JWT
API Documentation: Swagger/OpenAPI
Testing: Jest, Supertest

8.1.2 Frontend

Framework: React.js
State Management: Redux or Context API
UI Library: Material-UI or Tailwind CSS
Form Handling: Formik with Yup
HTTP Client: Axios
Testing: Jest, React Testing Library

8.2 Coding Standards

8.2.1 JavaScript/TypeScript

Follow Airbnb JavaScript Style Guide
Use ES6+ features
Use async/await for asynchronous code
Use proper error handling with try/catch
Document code with JSDoc comments

8.2.2 API Design

Follow RESTful API design principles
Use consistent naming conventions
Implement proper error handling
Include pagination for list endpoints
Document API with OpenAPI/Swagger

8.2.3 Database

Use migrations for schema changes
Follow naming conventions for tables and columns
Implement proper indexing
Use transactions for data integrity
Implement soft deletes where appropriate

8.3 Security Guidelines

8.3.1 Authentication

Use bcrypt for password hashing
Implement proper token validation
Use HTTPS for all communications
Implement CSRF protection
Use secure cookies with HttpOnly and Secure flags

8.3.2 Authorization

Implement role-based access control
Validate permissions for all operations
Implement proper tenant isolation
Log security events
Implement rate limiting

8.3.3 Data Protection

Encrypt sensitive data at rest
Use parameterized queries
Validate and sanitize all inputs
Implement proper error handling
Follow principle of least privilege

8.4 Testing Guidelines

8.4.1 Unit Testing

Test individual components and functions
Use mocks for external dependencies
Achieve high code coverage
Test edge cases and error conditions
Use test-driven development where appropriate

8.4.2 Integration Testing

Test API endpoints
Test database operations
Test authentication and authorization
Test error handling
Test performance under load

8.4.3 End-to-End Testing

Test complete user flows
Test UI interactions
Test integration with external services
Test deployment configuration
Test backup and recovery

9. Deployment Guidelines

9.1 Replit Deployment

9.1.1 Environment Setup

Configure Node.js environment
Set up environment variables
Configure database connection
Set up file storage
Configure logging

9.1.2 Deployment Process

Push code to Replit
Install dependencies
Run database migrations
Start application
Verify deployment

9.2 Monitoring and Maintenance

9.2.1 Logging

Implement comprehensive logging
Log application events
Log security events
Log performance metrics
Implement log rotation

9.2.2 Monitoring

Monitor application health
Monitor performance metrics
Monitor error rates
Set up alerts for critical issues
Implement uptime monitoring

9.2.3 Backup and Recovery

Implement database backups
Implement file backups
Test recovery procedures
Document backup and recovery processes
Implement disaster recovery plan

10. Integration Guidelines

10.1 Xero API Integration

10.1.1 Authentication

Implement OAuth 2.0 flow
Securely store tokens
Implement token refresh
Handle authentication errors
Monitor token usage

10.1.2 API Usage

Follow Xero API best practices
Implement proper error handling
Respect API rate limits
Implement caching where appropriate
Monitor API usage

10.2 n8n Integration

10.2.1 API Endpoints

Implement secure API endpoints
Document API for n8n integration
Implement proper error handling
Support webhook callbacks
Provide example workflows

10.2.2 Webhooks

Implement webhook handlers
Secure webhook endpoints
Implement retry logic
Log webhook events
Monitor webhook delivery

11. Documentation Requirements

11.1 User Documentation

Installation and setup guide
User manual
Feature documentation
Troubleshooting guide
FAQ

11.2 Developer Documentation

API documentation
Code documentation
Architecture documentation
Integration documentation
Deployment documentation

11.3 Maintenance Documentation

Backup and recovery procedures
Monitoring procedures
Troubleshooting procedures
Security procedures
Upgrade procedures

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Xero Accounting & CFO Assistant Agent - Technical Specification

1. Introduction

1.1 Purpose

1.2 Scope

1.3 Intended Audience

1.4 References

2. System Overview

2.1 System Description

2.2 System Context

2.3 System Goals

3. Functional Requirements

3.1 Xero API Wrapper

3.1.1 Contacts Management

3.1.2 Accounts Management

3.1.3 Invoices and Bills

3.1.4 Credit Notes

3.1.5 Payments

3.1.6 Bank Transactions

3.1.7 Bank Transfers

3.1.8 Expense Claims

3.1.9 Manual Journals

3.1.10 Reports

3.1.11 Budgets

3.1.12 Users & Organization Info

3.1.13 Attachments

3.2 Bookkeeping Automation

3.2.1 Bank Reconciliation Automation

3.2.2 Transaction Categorization

3.2.3 Invoicing Automation

3.2.4 Bill Processing

3.2.5 Payments and Collections

3.2.6 Period Close Assistance

3.3 Financial Analysis

3.3.1 Financial Reporting

3.3.2 Cash Flow Forecasting

3.3.3 Budget Analysis

3.3.4 KPI Dashboard

3.3.5 Anomaly Detection

3.4 n8n Integration

3.4.1 API Endpoints

3.4.2 Webhooks

3.4.3 Workflow Templates

3.5 User Management

3.5.1 User Authentication

3.5.2 Role-Based Access Control

3.5.3 Multi-Tenant Support

4. Non-Functional Requirements

4.1 Performance Requirements

4.2 Security Requirements

4.3 Reliability Requirements

4.4 Scalability Requirements

4.5 Usability Requirements

4.6 Compatibility Requirements

5. System Architecture

5.1 High-Level Architecture

5.2 Component Architecture

5.2.1 Frontend Components

5.2.2 Backend Components

5.2.3 Integration Components

5.3 Data Flow Architecture

5.3.1 Authentication Flow

5.3.2 API Request Flow

5.3.3 Webhook Flow

6. Database Design

6.1 Entity Relationship Diagram

6.2 Table Definitions

6.2.1 User Table

6.2.2 XeroTenant Table

6.2.3 XeroToken Table

6.2.4 UserTenant Table

6.2.5 CategoryRule Table

6.2.6 Transaction Table

6.2.7 Report Table

6.3 Indexes and Constraints