From b7e26b3f1d46c41f554f4bc947ecce6229d4ff2f Mon Sep 17 00:00:00 2001
From: John Hyde <johnhydefour@gmail.com>
Date: Wed, 10 Sep 2025 14:23:16 -0700
Subject: [PATCH] Check for no sponsor when validating star sponsorship

---
 client.go | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/client.go b/client.go
index 9a103d2..b5b9b00 100644
--- a/client.go
+++ b/client.go
@@ -254,6 +254,22 @@ func (c *Client) IsShipActive(ctx context.Context, point uint32) (bool, error) {
 	return resp.AzimuthIsActive.Value, nil
 }
 
+// GetSponsor retrieves the sponsor of a point
+func (c *Client) HasSponsor(ctx context.Context, point uint32) (bool, error) {
+	// Convert point to BigInt
+	pointBigInt := NewBigIntFromUint32(point)
+
+	// Use generated GraphQL client
+	resp, err := HasSponsor(ctx, c.gqlClient, "latest", c.contractAddress, pointBigInt)
+	if err != nil {
+		return false, fmt.Errorf("failed to query sponsor: %w", err)
+	}
+
+	// Parse sponsor point number from BigInt
+	hasSponsor := resp.AzimuthHasSponsor.Value
+	return hasSponsor, nil
+}
+
 // GetSponsor retrieves the sponsor of a point
 func (c *Client) GetSponsor(ctx context.Context, point uint32) (uint32, error) {
 	// Get current block hash
@@ -426,6 +442,14 @@ func (c *Client) getLatestBlockHash(ctx context.Context) (string, error) {
 
 // ValidateStarSponsorship validates that a star is sponsored by the expected galaxy
 func ValidateStarSponsorship(ctx context.Context, starID uint32, expectedGalaxyID uint32, client *Client) error {
+	hasSponsor, err := client.HasSponsor(ctx, starID)
+	if err != nil {
+		return fmt.Errorf("failed to get sponsor: %w", err)
+	}
+	if !hasSponsor {
+		return fmt.Errorf("star %d is not sponsored by galaxy %d (no sponsor)",
+			starID, expectedGalaxyID)
+	}
 	sponsor, err := client.GetSponsor(ctx, starID)
 	if err != nil {
 		return fmt.Errorf("failed to get sponsor: %w", err)