Merge branch 'alpha' into stake-distribution-sql

files/grest/rpc/pool/pool_metadata.sql

@@ -1,12 +1,40 @@
-CREATE OR REPLACE FUNCTION grest.pool_metadata(_pool_bech32 text)
-RETURNS JSON STABLE LANGUAGE PLPGSQL AS $$
+CREATE OR REPLACE FUNCTION grest.pool_metadata (_pool_bech32 text default null)
+    RETURNS json STABLE
+    LANGUAGE PLPGSQL
+    AS $$
 BEGIN
-    RETURN ( SELECT json_build_object(
-        'meta_url', pmd.url,
-        'meta_hash', encode(pmd.hash::bytea, 'hex')
-    )
-    FROM public.pool_meta_data AS pmd
-    WHERE pmd.id = (SELECT id from public.pool_hash where view=_pool_bech32)
-    );
-END; $$;
-COMMENT ON FUNCTION grest.pool_metadata IS 'Get pool metadata url and hash';
+    IF _pool_bech32 IS NULL THEN
+        RETURN (
+            SELECT
+                json_agg(js) json_final
+            FROM ( SELECT DISTINCT ON (ph.id)
+                    json_build_object('pool_id', ph.view, 'meta_url', pmr.url, 'meta_hash', encode(pmr.hash::bytea, 'hex')) js
+                FROM
+                    public.pool_metadata_ref AS pmr
+                    INNER JOIN pool_hash AS ph ON ph.id = pmr.pool_id
+                ORDER BY
+                    ph.id,
+                    pmr.registered_tx_id DESC) t);
+    ELSE
+        RETURN (
+            SELECT
+                json_build_object('meta_url', pmr.url, 'meta_hash', encode(pmr.hash::bytea, 'hex'))
+            FROM
+                public.pool_metadata_ref AS pmr
+            WHERE
+                pmr.pool_id = (
+                    SELECT
+                        id
+                    FROM
+                        public.pool_hash
+                    WHERE
+                        VIEW = _pool_bech32)
+                ORDER BY
+                    pmr.registered_tx_id DESC
+                LIMIT 1);
+    END IF;
+END;
+$$;
+
+COMMENT ON FUNCTION grest.pool_metadata IS 'Get pool metadata url and hash, all pools if pool_id empty';
+