flags: add deprecation warnings to old memstore flag env-vars

store/generated_key/memstore/cli.go

@@ -1,6 +1,8 @@
 package memstore
 
 import (
+	"fmt"
+	"os"
 	"time"
 
 	"github.com/Layr-Labs/eigenda-proxy/verify"
@@ -19,25 +21,51 @@ func withFlagPrefix(s string) string {
 }
 
 func withEnvPrefix(envPrefix, s string) []string {
-	return []string{envPrefix + "_MEMSTORE_" + s}
+	return []string{
+		envPrefix + "_MEMSTORE_" + s,
+	}
+}
+
+// if these deprecated env vars are used, we force the user to update their config
+// in the flags' actions
+func withDeprecatedEnvPrefix(envPrefix, s string) string {
+	return "MEMSTORE_" + s
 }
 
-// CLIFlags ... used for Redis backend configuration
+// CLIFlags ... used for memstore backend configuration
 // category is used to group the flags in the help output (see https://cli.urfave.org/v2/examples/flags/#grouping)
 func CLIFlags(envPrefix, category string) []cli.Flag {
 	return []cli.Flag{
 		&cli.BoolFlag{
 			Name:     EnabledFlagName,
-			Usage:    "Whether to use mem-store for DA logic.",
-			EnvVars:  withEnvPrefix(envPrefix, "ENABLED"),
+			Usage:    "Whether to use memstore for DA logic.",
+			EnvVars:  append(withEnvPrefix(envPrefix, "ENABLED"), withDeprecatedEnvPrefix(envPrefix, "ENABLED")),
 			Category: category,
+			Action: func(_ *cli.Context, _ bool) error {
+				if _, ok := os.LookupEnv(withDeprecatedEnvPrefix(envPrefix, "ENABLED")); ok {
+					return fmt.Errorf("env var %s is deprecated for flag %s, use %s instead",
+						withDeprecatedEnvPrefix(envPrefix, "ENABLED"),
+						EnabledFlagName,
+						withEnvPrefix(envPrefix, "ENABLED")[0])
+				}
+				return nil
+			},
 		},
 		&cli.DurationFlag{
 			Name:     ExpirationFlagName,
 			Usage:    "Duration that a memstore blob/commitment pair is allowed to live.",
 			Value:    25 * time.Minute,
-			EnvVars:  withEnvPrefix(envPrefix, "EXPIRATION"),
+			EnvVars:  append(withEnvPrefix(envPrefix, "EXPIRATION"), withDeprecatedEnvPrefix(envPrefix, "EXPIRATION")),
 			Category: category,
+			Action: func(_ *cli.Context, _ time.Duration) error {
+				if _, ok := os.LookupEnv(withDeprecatedEnvPrefix(envPrefix, "EXPIRATION")); ok {
+					return fmt.Errorf("env var %s is deprecated for flag %s, use %s instead",
+						withDeprecatedEnvPrefix(envPrefix, "EXPIRATION"),
+						ExpirationFlagName,
+						withEnvPrefix(envPrefix, "EXPIRATION")[0])
+				}
+				return nil
+			},
 		},
 		&cli.DurationFlag{
 			Name:     PutLatencyFlagName,