{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://api-evangelist.github.io/opennode/json-schema/opennode-charge.json",
  "title": "OpenNode Charge",
  "description": "Schema for an OpenNode Bitcoin payment charge object returned by the Charges API.",
  "type": "object",
  "properties": {
    "id": {
      "type": "string",
      "description": "Unique charge identifier.",
      "examples": ["ch_abc123def456"]
    },
    "description": {
      "type": "string",
      "description": "Payment description displayed in the payer's wallet."
    },
    "amount": {
      "type": "integer",
      "description": "Charge amount in satoshis.",
      "minimum": 1
    },
    "status": {
      "type": "string",
      "enum": ["unpaid", "processing", "paid", "expired"],
      "description": "Current payment status of the charge."
    },
    "fiat_value": {
      "type": "number",
      "description": "Fiat value of the charge at the time of creation."
    },
    "currency": {
      "type": "string",
      "description": "ISO 4217 fiat currency code used for conversion.",
      "pattern": "^[A-Z]{3}$",
      "examples": ["USD", "EUR", "GBP"]
    },
    "source_fiat_value": {
      "type": "number",
      "description": "Source fiat value used for conversion."
    },
    "lightning_invoice": {
      "type": "object",
      "description": "Lightning Network payment invoice.",
      "properties": {
        "expires_at": {
          "type": "integer",
          "description": "Unix timestamp when the Lightning invoice expires."
        },
        "payreq": {
          "type": "string",
          "description": "BOLT11 Lightning payment request string."
        }
      }
    },
    "chain_invoice": {
      "type": "object",
      "description": "On-chain Bitcoin invoice details.",
      "properties": {
        "address": {
          "type": "string",
          "description": "On-chain Bitcoin address for payment."
        },
        "settled_at": {
          "type": "integer",
          "description": "Unix timestamp when the on-chain payment was settled."
        }
      }
    },
    "address": {
      "type": "string",
      "description": "Primary on-chain Bitcoin address for the charge."
    },
    "created_at": {
      "type": "integer",
      "description": "Unix timestamp of charge creation."
    },
    "order_id": {
      "type": "string",
      "description": "Merchant internal order reference identifier."
    },
    "callback_url": {
      "type": "string",
      "format": "uri",
      "description": "Webhook endpoint URL for payment status notifications."
    },
    "success_url": {
      "type": "string",
      "format": "uri",
      "description": "Redirect URL for the customer after successful payment."
    },
    "auto_settle": {
      "type": "boolean",
      "description": "Whether automatic fiat settlement is enabled.",
      "default": false
    }
  },
  "required": ["id", "amount", "status", "created_at"]
}