kraken: switch to `rapidfuzz` API

piker/brokers/kraken/api.py

@@ -38,7 +38,10 @@ import base64
 import trio
 
 from piker import config
-from piker.data import def_iohlcv_fields
+from piker.data import (
+    def_iohlcv_fields,
+    match_from_pairs,
+)
 from piker.accounting._mktinfo import (
     Asset,
     digits_to_dec,
@@ -548,13 +551,17 @@ class Client:
             await self.get_mkt_pairs()
             assert self._pairs, '`Client.get_mkt_pairs()` was never called!?'
 
-        matches = fuzzy.extractBests(
-            pattern,
-            self._pairs,
+        matches: dict[str, Pair] = match_from_pairs(
+            pairs=self._pairs,
+            query=pattern.upper(),
             score_cutoff=50,
         )
-        # repack in dict form
-        return {item[0].altname: item[0] for item in matches}
+
+        # repack in .altname-keyed output table
+        return {
+            pair.altname: pair
+            for pair in matches.values()
+        }
 
     async def bars(
         self,

piker/brokers/kraken/symbols.py

@@ -136,19 +136,10 @@ async def open_symbol_search(ctx: tractor.Context) -> None:
         await ctx.started(cache)
 
         async with ctx.open_stream() as stream:
-
             async for pattern in stream:
-
-                matches = fuzzy.extractBests(
-                    pattern,
-                    client._pairs,
-                    score_cutoff=50,
+                await stream.send(
+                    await client.search_symbols(pattern)
                 )
-                # repack in dict form
-                await stream.send({
-                    pair[0].altname: pair[0]
-                    for pair in matches
-                })
 
 
 @async_lifo_cache()