+// AC
+# define EMVAC_AC_MASK 0xC0
+# define EMVAC_AAC 0x00
+# define EMVAC_TC 0x40
+# define EMVAC_ARQC 0x80
+# define EMVAC_CDAREQ 0x10
+
+// CID
+# define EMVCID_ADVICE 0x08
+# define EMVCID_REASON_MASK 0x07
+
+bool emv_tag_dump(const struct tlv *tlv, FILE *f, int level);
+char *emv_get_tag_name(const struct tlv *tlv);