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Product Structure

Products in Vayu contracts have a specific structure that defines their scheduling, pricing, and metadata. This section details the different valid structures products can have.

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Basic Product Properties

Every product must have the following required properties:
  • displayName (string): The display name of the product
  • scheduling (object): Defines the billing schedule for the product
  • pricing (object): Defines the pricing model for the product
Optional properties include:
  • description (string, nullable): A description of the product
  • catalogProductId (string, nullable): Reference to a catalog product
  • productErpId (string, nullable): ERP system identifier for the product

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Scheduling Structure

The scheduling object defines when and how often the product is billed. The first billing schedule starts when the contract starts (unless using the more advanced installments feature). 
{
  "scheduling": {
    "billingDay": 1,
    "duration": {
      "unit": "MONTH",
      "value": 1
    }
  }
}

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Properties

  • billingDay (integer, required): The day of the month that the product is billed (1-31)
    Note: The billing day should almost always start at the contract start date to ensure proper billing alignment and avoid proration issues.
  • duration (object, required): The duration of the product
    • unit (string, required): Time unit - DAY, WEEK, MONTH, or YEAR
    • value (integer, required): Number of units (0-1000)

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Pricing Models

Products support multiple pricing models defined in the pricing object. These are divided into two main categories:

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Fixed Products

Fixed products have predetermined pricing that doesn’t depend on usage.

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1. One-Time Payment

  • type: "ONE_TIME"
  • price (number, required): The one-time price (minimum 0)
Note: One-time payment products can only have a scheduling duration of 1 day.

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2. Subscription

  • type: "SUBSCRIPTION"
  • price (number, required): Price per subscription period (minimum 0)
  • subscriptionCadence (object, required): How many times the subscription charges accumulate within the billing period
    • unit (string, required): Time unit - DAY, WEEK, MONTH, or YEAR
    • value (integer, required): Number of units (0-1000)

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3. Contract Terms

  • type: "CONTRACT_TERMS"
  • price (number, required): Total contract fee for the lifetime of the contract (minimum 0)
  • installments (array, optional): Array of installment objects to split the contract fee
    • installmentDate (string, required): ISO 8601 date-time of the installment
    • amount (number, required): Amount for this installment (minimum 0)

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Usage Products

Usage products have pricing that depends on actual consumption or usage metrics.
Important: Usage products must have a catalogProductId because that is where the usage metering is defined.

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4. Tiered Pricing

Tiered pricing offers different rates or fees based on usage volume.
  • type: "TIERED"
  • tiers (array, required): Array of pricing tiers
    • fromInclusive (number, required): Starting quantity for this tier (minimum 0)
    • toExclusive (number, optional): Ending quantity for this tier (null for unlimited)
    • rate (number, optional): Rate per unit in this tier (minimum 0)
    • flatFee (number, optional): Flat fee for this tier (minimum 0). Defaults to 0 if not specified.
    • packageSize (number, optional): Package size for this tier (minimum 0). Defaults to 1 if not specified.
  • subscriptionCadence (object, optional): How many times the subscription charges accumulate within the billing period
  • autoUpgrade (boolean, optional): Whether to automatically upgrade to higher tiers in the next billing period
  • prorate (boolean, optional): Whether to prorate flat fees based on when the user crossed the tier

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5. Per-Unit Pricing

Per-unit pricing is a simple pay-as-you-go model where customers are charged based on their actual usage.
  • type: "PER_UNIT"
  • price (number, required): Price per unit (minimum 0)
  • chunkSize (number, required): Number of units per chunk (minimum 0, exclusive)

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Examples

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Fixed Product Examples

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One-Time Payment

This product charges a single fee that is billed immediately when the contract starts. The billing duration is always 1 day. 
{
  "displayName": "Setup Fee",
  "description": "One-time setup fee for new customers",
  "scheduling": {
    "billingDay": 1,
    "duration": {
      "unit": "DAY",
      "value": 1
    }
  },
  "pricing": {
    "type": "ONE_TIME",
    "price": 100.00
  }
}

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Subscription

This product charges a recurring fee with monthly subscription cadence but quarterly billing. The subscription charges accumulate monthly, but the customer is billed every 3 months. 
{
  "displayName": "Monthly Premium Plan",
  "description": "Monthly subscription to premium features with quarterly billing",
  "scheduling": {
    "billingDay": 1,
    "duration": {
      "unit": "MONTH",
      "value": 3
    }
  },
  "pricing": {
    "type": "SUBSCRIPTION",
    "price": 50.00,
    "subscriptionCadence": {
      "unit": "MONTH",
      "value": 1
    }
  }
}

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Contract Terms

This product charges a contract fee for the lifetime of the contract. The fee can optionally be split into installments at custom dates instead of regular billing schedules. 
{
  "displayName": "Annual Software License",
  "description": "Annual software license paid in installments",
  "scheduling": {
    "billingDay": 1,
    "duration": {
      "unit": "YEAR",
      "value": 1
    }
  },
  "pricing": {
    "type": "CONTRACT_TERMS",
    "price": 1000.00,
    "installments": [
      {
        "installmentDate": "2024-01-01T00:00:00Z",
        "amount": 500.00
      },
      {
        "installmentDate": "2024-06-01T00:00:00Z",
        "amount": 500.00
      }
    ]
  }
}

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Usage Product Examples

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Per-Unit Pricing

This is the simplest usage-based pricing model. Customers are charged a fixed rate per unit consumed, with optional chunking for billing efficiency. 
{
  "displayName": "SMS Messages",
  "description": "Pay-per-SMS message with chunked billing",
  "scheduling": {
    "billingDay": 1,
    "duration": {
      "unit": "MONTH",
      "value": 1
    }
  },
  "pricing": {
    "type": "PER_UNIT",
    "price": 2.50,
    "chunkSize": 10
  },
  "catalogProductId": "64a1b2c3d4e5f6789012345d"
}

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Simple Tiered Pricing

This product charges different rates based on usage volume with no flat fees or chunking. Customers pay per unit at different rates depending on their usage tier. 
{
  "displayName": "API Usage Tiers",
  "description": "Volume-based pricing for API calls",
  "scheduling": {
    "billingDay": 1,
    "duration": {
      "unit": "MONTH",
      "value": 1
    }
  },
  "pricing": {
    "type": "TIERED",
    "tiers": [
      {
        "fromInclusive": 0,
        "toExclusive": 1000,
        "rate": 0.10
      },
      {
        "fromInclusive": 1000,
        "toExclusive": 10000,
        "rate": 0.08
      },
      {
        "fromInclusive": 10000,
        "rate": 0.05
      }
    ]
  },
  "catalogProductId": "64a1b2c3d4e5f6789012345a"
}

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Tiered Subscription with Auto-Upgrade and Proration

This is the most complex usage-based pricing model. It charges different flat fees based on usage tiers with subscription billing, automatic tier upgrades, and proration. 
{
  "displayName": "Storage Subscription Tiers",
  "description": "Monthly storage subscription with automatic tier upgrades and proration",
  "scheduling": {
    "billingDay": 1,
    "duration": {
      "unit": "MONTH",
      "value": 1
    }
  },
  "pricing": {
    "type": "TIERED",
    "tiers": [
      {
        "fromInclusive": 0,
        "toExclusive": 100,
        "flatFee": 10.00
      },
      {
        "fromInclusive": 100,
        "toExclusive": 500,
        "flatFee": 25.00
      },
      {
        "fromInclusive": 500,
        "flatFee": 50.00
      }
    ],
    "subscriptionCadence": {
      "unit": "MONTH",
      "value": 1
    },
    "autoUpgrade": true,
    "prorate": true
  },
  "catalogProductId": "64a1b2c3d4e5f6789012345b"
}