Early Exit (lam.exit)

When writing a workflow step program and you need to exit the workflow early because a pre-condition is not met, use the keyword lam.exit in your return object.

Example: Using our order fulfillment workflow example from Getting Started, suppose we needed to check that incoming order is not for a digital service before proceeding to send data to fulfillment centre.

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Send Orders to Fulfillment Centre

(data) => {
    const inputOrder = data.input;
    
+   if (inputOrder.isDigital) {
+       return {
+         "lam.exit": true,
+         // payload to be returned
+         "data": { 
+           "message": "Skipped. Digital service orders should not be sent to fulfillment centre.",
+           "order": inputOrder,
+         }
+       };
+   }

    // Use Array.map to transform the items array
    const transformedItems = inputOrder.items.map(item => ({
        sku: item.product.sku,
        name: item.product.name,
        quantity: item.quantity,
        price: parseFloat(item.price) // Convert price from string to number
    }));

    // Construct the final output object
    const outputOrder = {
        customer_name: inputOrder.customerName,
        customer_email: inputOrder.customerEmail,
        customer_phone: "[phone]", // Placeholder as source data is missing
        shipping_address: {
            street: `${inputOrder.shippingAddressLine1 || ''} ${inputOrder.shippingAddressLine2 || ''}`.trim(),
            city: inputOrder.shippingCity,
            state: inputOrder.shippingState,
            zip: inputOrder.shippingZipCode,
            country: inputOrder.shippingCountry
        },
        items: transformedItems,
        shipping_method: "standard" // Default value as source data is missing
    };

    return outputOrder;
}

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