Advanced Routing Example

Advanced Euclid rule tree examples for /routing/create, including AND, OR, nested rules, and value variants.

Advanced Routing Example

Use algorithm.type = advanced when a merchant needs conditional rule-based routing instead of a fixed connector order. Advanced rules evaluate payment attributes, choose the first matching rule output, and fall back to default_selection when no rule matches.

Advanced Program Shape

{
  "globals": {},
  "default_selection": {
    "priority": [
      { "gateway_name": "stripe", "gateway_id": "mca_stripe" }
    ]
  },
  "rules": [],
  "metadata": {}
}

Field	Meaning
globals	Optional reusable value sets referenced by global_ref.
default_selection	Fallback single, priority, volume_split, or volume_split_priority output.
rules[].routing_type	Rule output behavior: priority, volume_split, or volume_split_priority.
rules[].output	Connector output returned when the rule matches.
rules[].statements[].condition	Conditions inside one statement. All conditions in the same array must match.
rules[].statements[].nested	Optional nested statements. Parent condition must match and then nested statements are evaluated.

Full Create Request

curl --location "$BASE_URL/routing/create" \
  --header "$AUTH_HEADER" \
  --header "Content-Type: application/json" \
  --data '{
    "name": "advanced card routing",
    "created_by": "merchant_demo",
    "description": "Route Visa card traffic by priority, otherwise fallback to stripe",
    "algorithm_for": "payment",
    "algorithm": {
      "type": "advanced",
      "data": {
        "globals": {},
        "default_selection": {
          "priority": [
            { "gateway_name": "stripe", "gateway_id": "mca_stripe" }
          ]
        },
        "rules": [
          {
            "name": "visa_card_rule",
            "routing_type": "priority",
            "output": {
              "priority": [
                { "gateway_name": "adyen", "gateway_id": "mca_adyen" },
                { "gateway_name": "stripe", "gateway_id": "mca_stripe" }
              ]
            },
            "statements": [
              {
                "condition": [
                  {
                    "lhs": "payment_method_type",
                    "comparison": "equal",
                    "value": { "type": "enum_variant", "value": "CARD" },
                    "metadata": {}
                  },
                  {
                    "lhs": "card_network",
                    "comparison": "equal",
                    "value": { "type": "enum_variant", "value": "Visa" },
                    "metadata": {}
                  }
                ],
                "nested": null
              }
            ]
          }
        ],
        "metadata": {}
      }
    }
  }'

Logic Variants

AND Rule

Use one condition array when all conditions must match.

{
  "name": "high_value_netherlands_rule",
  "routing_type": "volume_split",
  "output": {
    "volume_split": [
      {
        "split": 60,
        "output": { "gateway_name": "hdfc", "gateway_id": "mca_hdfc" }
      },
      {
        "split": 40,
        "output": { "gateway_name": "instamojo", "gateway_id": "mca_instamojo" }
      }
    ]
  },
  "statements": [
    {
      "condition": [
        {
          "lhs": "amount",
          "comparison": "greater_than",
          "value": { "type": "number", "value": 100 },
          "metadata": {}
        },
        {
          "lhs": "billing_country",
          "comparison": "equal",
          "value": { "type": "enum_variant", "value": "Netherlands" },
          "metadata": {}
        }
      ],
      "nested": null
    }
  ]
}

OR Rule

Use multiple statements when any statement can trigger the rule.

{
  "name": "card_or_high_value_rule",
  "routing_type": "priority",
  "output": {
    "priority": [
      { "gateway_name": "paytm", "gateway_id": "mca_paytm" },
      { "gateway_name": "adyen", "gateway_id": "mca_adyen" }
    ]
  },
  "statements": [
    {
      "condition": [
        {
          "lhs": "payment_method_type",
          "comparison": "equal",
          "value": { "type": "enum_variant", "value": "CARD" },
          "metadata": {}
        }
      ],
      "nested": null
    },
    {
      "condition": [
        {
          "lhs": "amount",
          "comparison": "greater_than",
          "value": { "type": "number", "value": 100 },
          "metadata": {}
        }
      ],
      "nested": null
    }
  ]
}

Nested AND + OR Rule

Use nested when a parent condition must match and then one nested branch can match.

{
  "name": "amount_and_card_network_or_country_rule",
  "routing_type": "priority",
  "output": {
    "priority": [
      { "gateway_name": "rbl", "gateway_id": "mca_rbl" },
      { "gateway_name": "instamojo", "gateway_id": "mca_instamojo" }
    ]
  },
  "statements": [
    {
      "condition": [
        {
          "lhs": "amount",
          "comparison": "greater_than",
          "value": { "type": "number", "value": 10 },
          "metadata": {}
        }
      ],
      "nested": [
        {
          "condition": [
            {
              "lhs": "card_network",
              "comparison": "equal",
              "value": { "type": "enum_variant", "value": "Visa" },
              "metadata": {}
            }
          ],
          "nested": null
        },
        {
          "condition": [
            {
              "lhs": "billing_country",
              "comparison": "equal",
              "value": { "type": "enum_variant", "value": "India" },
              "metadata": {}
            }
          ],
          "nested": null
        }
      ]
    }
  ]
}

Output Variants

Priority Output

{
  "routing_type": "priority",
  "output": {
    "priority": [
      { "gateway_name": "adyen", "gateway_id": "mca_adyen" },
      { "gateway_name": "stripe", "gateway_id": "mca_stripe" }
    ]
  }
}

Volume Split Output

{
  "routing_type": "volume_split",
  "output": {
    "volume_split": [
      {
        "split": 70,
        "output": { "gateway_name": "stripe", "gateway_id": "mca_stripe" }
      },
      {
        "split": 30,
        "output": { "gateway_name": "adyen", "gateway_id": "mca_adyen" }
      }
    ]
  }
}

Volume Split Priority Output

Use volume_split_priority when each split should return a priority list rather than a single connector.

{
  "routing_type": "volume_split_priority",
  "output": {
    "volume_split_priority": [
      {
        "split": 60,
        "output": [
          { "gateway_name": "stripe", "gateway_id": "mca_stripe" },
          { "gateway_name": "adyen", "gateway_id": "mca_adyen" }
        ]
      },
      {
        "split": 40,
        "output": [
          { "gateway_name": "checkout", "gateway_id": "mca_checkout" },
          { "gateway_name": "stripe", "gateway_id": "mca_stripe" }
        ]
      }
    ]
  }
}

Value Variants

Enum Variant Array

{
  "lhs": "card_network",
  "comparison": "equal",
  "value": {
    "type": "enum_variant_array",
    "value": ["Visa", "Mastercard"]
  },
  "metadata": {}
}

Number Array

{
  "lhs": "amount",
  "comparison": "equal",
  "value": {
    "type": "number_array",
    "value": [1000, 2000, 5000]
  },
  "metadata": {}
}

Number Comparison Array

{
  "lhs": "amount",
  "comparison": "equal",
  "value": {
    "type": "number_comparison_array",
    "value": [
      { "comparison_type": "greater_than", "number": 1000 },
      { "comparison_type": "less_than_equal", "number": 5000 }
    ]
  },
  "metadata": {}
}

Notes

• Advanced algorithms require statements; top-level single, priority, and volume_split algorithms do not.
• Conditions in the same condition array behave like AND.
• Multiple statements behave like OR.
• nested allows a parent condition plus nested branch matching.
• volume_split percentages should add up to 100.

Related

• Create Routing Algorithm
• Evaluate Routing Algorithm
• Priority Routing
• Volume Split Routing