api: add update_customer_address checkout field

api/api.go

@@ -215,6 +215,7 @@ func (h *Handler) serveCheckout(w http.ResponseWriter, r *http.Request) error {
 		Features:              fs,
 		CancelURL:             cr.CancelURL,
 		RequireBillingAddress: cr.RequireBillingAddress,
+		UpdateCustomerAddress: cr.UpdateCustomerAddress,
 		AutomaticTax:          cr.Tax.Automatic,
 		CollectTaxID:          cr.Tax.CollectID,
 	})

api/apitypes/apitypes.go

@@ -126,6 +126,7 @@ type CheckoutRequest struct {
 	SuccessURL            string   `json:"success_url"`
 	CancelURL             string   `json:"cancel_url"`
 	RequireBillingAddress bool     `json:"require_billing_address"`
+	UpdateCustomerAddress bool     `json:"update_customer_address"`
 	Tax                   Taxation `json:"tax"`
 }
 

client/tier/client.go

@@ -302,6 +302,7 @@ func (c *Client) Checkout(ctx context.Context, org string, successURL string, p
 		TrialDays:             p.TrialDays,
 		Features:              p.Features,
 		RequireBillingAddress: p.RequireBillingAddress,
+		UpdateCustomerAddress: p.UpdateCustomerAddress,
 		Tax:                   p.Tax,
 	}
 	return fetchOK[*apitypes.CheckoutResponse, *apitypes.Error](ctx, c, "POST", "/v1/checkout", r)
@@ -315,6 +316,7 @@ type CheckoutParams struct {
 	Features              []string
 	CancelURL             string
 	RequireBillingAddress bool
+	UpdateCustomerAddress bool
 	Tax                   Taxation
 }
 

control/schedule.go

@@ -537,6 +537,7 @@ type CheckoutParams struct {
 	Features              []Feature
 	CancelURL             string
 	RequireBillingAddress bool
+	UpdateCustomerAddress bool // if true, update customer address to the address entered at checkout
 	AutomaticTax          bool
 	CollectTaxID          bool
 }
@@ -568,6 +569,9 @@ func (c *Client) Checkout(ctx context.Context, org string, successURL string, p
 	if p.RequireBillingAddress {
 		f.Set("billing_address_collection", "required")
 	}
+	if p.UpdateCustomerAddress {
+		f.Set("customer_update", "address", "auto")
+	}
 	if len(p.Features) == 0 {
 		f.Set("mode", "setup")
 		// TODO: support other payment methods: