Added address name linking mandatory with a default value

cmd/account/link_key/link_key.go

@@ -175,7 +175,23 @@ func (h *handler) Execute(ctx context.Context, in Inputs) error {
 			)
 			return fmt.Errorf("missing required flags for --non-interactive mode")
 		}
-		label, err := ui.Input("Provide a label for your owner address")
+		defaultLabel := h.defaultOwnerLabel()
+
+		title := "Provide a label for your owner address"
+		if defaultLabel != "" {
+			title = fmt.Sprintf("%s [%s]", title, defaultLabel)
+		}
+
+		label, err := ui.Input(
+			title,
+			ui.WithDefaultValue(defaultLabel),
+			ui.WithValidate(func(s string) error {
+				if strings.TrimSpace(s) == "" {
+					return fmt.Errorf("a label is required")
+				}
+				return nil
+			}),
+		)
 		if err != nil {
 			return err
 		}
@@ -408,6 +424,20 @@ func (h *handler) checkIfAlreadyLinked() (bool, error) {
 	return false, nil
 }
 
+// defaultOwnerLabel derives a suggested label from the authenticated user's
+// email address (the portion before the "@"). Returns "" if no email is available.
+func (h *handler) defaultOwnerLabel() string {
+	email, err := h.credentials.GetEmail()
+	if err != nil || email == "" {
+		return ""
+	}
+
+	if idx := strings.Index(email, "@"); idx > 0 {
+		return email[:idx]
+	}
+	return email
+}
+
 func (h *handler) displayDetails() {
 	ui.Line()
 	ui.Title("Linking web3 key to your CRE organization")

internal/credentials/credentials.go

@@ -184,6 +184,31 @@ func (c *Credentials) GetOrgID() (string, error) {
 	return orgID, nil
 }
 
+// GetEmail returns the authenticated user's email address from the access token.
+// It is not available for API key authentication.
+func (c *Credentials) GetEmail() (string, error) {
+	if c.AuthType == AuthTypeApiKey {
+		return "", fmt.Errorf("email is not available for API key authentication")
+	}
+
+	claims, err := c.decodeJWTClaims()
+	if err != nil {
+		return "", err
+	}
+
+	// The email claim is namespaced (e.g. "https://api.cre.chain.link/email"),
+	// so find it by looking for any key ending with "email".
+	for key, value := range claims {
+		if strings.HasSuffix(key, "email") {
+			if email, ok := value.(string); ok && email != "" {
+				return email, nil
+			}
+		}
+	}
+
+	return "", fmt.Errorf("email claim not found in access token")
+}
+
 // GetDeploymentAccessStatus returns the deployment access status for the organization.
 // This can be used to check and display whether the user has deployment access.
 func (c *Credentials) GetDeploymentAccessStatus() (*DeploymentAccess, error) {

internal/ui/prompts.go

@@ -80,8 +80,10 @@ func Confirm(title string, opts ...ConfirmOption) (bool, error) {
 type InputOption func(*inputConfig)
 
 type inputConfig struct {
-	description string
-	placeholder string
+	description  string
+	placeholder  string
+	defaultValue string
+	validate     func(string) error
 }
 
 // WithInputDescription sets the description for an Input prompt.
@@ -98,14 +100,30 @@ func WithPlaceholder(placeholder string) InputOption {
 	}
 }
 
+// WithDefaultValue pre-fills the Input prompt with the given value, so pressing
+// Enter without editing submits the default.
+func WithDefaultValue(value string) InputOption {
+	return func(c *inputConfig) {
+		c.defaultValue = value
+	}
+}
+
+// WithValidate sets a validation function for an Input prompt. The form
+// will not submit until the function returns nil.
+func WithValidate(validate func(string) error) InputOption {
+	return func(c *inputConfig) {
+		c.validate = validate
+	}
+}
+
 // Input displays a single text input prompt and returns the entered value.
 func Input(title string, opts ...InputOption) (string, error) {
 	cfg := inputConfig{}
 	for _, o := range opts {
 		o(&cfg)
 	}
 
-	var result string
+	result := cfg.defaultValue
 	input := huh.NewInput().
 		Title(title).
 		Value(&result)
@@ -116,6 +134,9 @@ func Input(title string, opts ...InputOption) (string, error) {
 	if cfg.placeholder != "" {
 		input = input.Placeholder(cfg.placeholder)
 	}
+	if cfg.validate != nil {
+		input = input.Validate(cfg.validate)
+	}
 
 	form := huh.NewForm(
 		huh.NewGroup(input),