libutil: fluid: support FLUID_STRING_EMOJI

Problem: Encoding FLUIDs to a string of emoji is not supported.

Use the libutil/basemoji implementation to add a FLUID_STRING_EMOJI
string type to fluid_string_type_t. Make sure FLUID_STRING_EMOJI is
supported with fluid_parse(3).

Author: grondo

src/common/libutil/fluid.c

@@ -27,6 +27,7 @@
 #include "ccan/str/str.h"
 #include "fluid.h"
 #include "mnemonic.h"
+#include "basemoji.h"
 
 /* fluid: [ts:40 id:14 seq:10] */
 static const int bits_per_ts = 40;
@@ -334,6 +335,10 @@ int fluid_encode (char *buf, int bufsz, fluid_t fluid,
             if (fluid_f58_encode (buf, bufsz, fluid) < 0)
                 return -1;
             break;
+        case FLUID_STRING_EMOJI:
+            if (uint64_basemoji_encode (fluid, buf, bufsz) < 0)
+                return -1;
+            break;
     }
     return 0;
 }
@@ -380,6 +385,10 @@ int fluid_decode (const char *s, fluid_t *fluidp, fluid_string_type_t type)
             if (fluid_f58_decode (&fluid, s) < 0)
                 return -1;
             break;
+        case FLUID_STRING_EMOJI:
+            if (uint64_basemoji_decode (s, &fluid) < 0)
+                return -1;
+            break;
         default:
             errno = EINVAL;
             return -1;
@@ -413,6 +422,8 @@ fluid_string_type_t fluid_string_detect_type (const char *s)
         return FLUID_STRING_MNEMONIC;
     if (fluid_is_f58 (s) > 0)
         return FLUID_STRING_F58;
+    if (is_basemoji_string (s))
+        return FLUID_STRING_EMOJI;
     return 0;
 }
 

src/common/libutil/fluid.h

@@ -23,6 +23,7 @@ typedef enum {
     FLUID_STRING_DOTHEX = 1,    // x.x.x.x
     FLUID_STRING_MNEMONIC = 2,  // mnemonicode x-x-x--x-x-x
     FLUID_STRING_F58 = 3,       // FLUID base58 enc: ƒXXXX or fXXXX
+    FLUID_STRING_EMOJI = 4,     // FLUID basemoji enc: 😪🏭🐭🍑👨
 } fluid_string_type_t;
 
 struct fluid_generator {