diff --git a/sys/vane/jael.hoon b/sys/vane/jael.hoon
index f1d93eea3..e41bf93ee 100644
--- a/sys/vane/jael.hoon
+++ b/sys/vane/jael.hoon
@@ -2121,7 +2121,7 @@
       ==
     =+  cuz=[block-number.place log-index.place]
     ::
-    ?:  =(event.log changed-dns:azimuth-events)
+    ?:  =(i.topics.log changed-dns:azimuth-events)
       =+  ^-  [pri=tape sec=tape ter=tape]
         %+  decode-results  data.log
         ~[%string %string %string]
diff --git a/sys/zuse.hoon b/sys/zuse.hoon
index b6a7fc03f..309415108 100644
--- a/sys/zuse.hoon
+++ b/sys/zuse.hoon
@@ -7329,79 +7329,79 @@
     ^-  (unit (pair ship diff-point))
     ~?  ?=(~ mined.log)  %processing-unmined-event
     ::
-    ?:  =(event.log owner-changed)
+    ?:  =(i.topics.log owner-changed)
       =+  ^-  [who=@ wer=address]
           (decode-topics topics.log ~[%uint %address])
       `[who %owner wer]
     ::
-    ?:  =(event.log activated)
+    ?:  =(i.topics.log activated)
       =/  who=@
         (decode-topics topics.log ~[%uint])
       `[who %activated who]
     ::
-    ?:  =(event.log spawned)
+    ?:  =(i.topics.log spawned)
       =+  ^-  [pre=@ who=@]
           (decode-topics topics.log ~[%uint %uint])
       `[pre %spawned who]
     ::
-    ?:  =(event.log escape-requested)
+    ?:  =(i.topics.log escape-requested)
       =+  ^-  [who=@ wer=@]
           (decode-topics topics.log ~[%uint %uint])
       `[who %escape `wer]
     ::
-    ?:  =(event.log escape-canceled)
+    ?:  =(i.topics.log escape-canceled)
       =/  who=@  (decode-topics topics.log ~[%uint])
       `[who %escape ~]
     ::
-    ?:  =(event.log escape-accepted)
+    ?:  =(i.topics.log escape-accepted)
       =+  ^-  [who=@ wer=@]
           (decode-topics topics.log ~[%uint %uint])
       `[who %sponsor & wer]
     ::
-    ?:  =(event.log lost-sponsor)
+    ?:  =(i.topics.log lost-sponsor)
       =+  ^-  [who=@ pos=@]
           (decode-topics topics.log ~[%uint %uint])
       `[who %sponsor | pos]
     ::
-    ?:  =(event.log changed-keys)
+    ?:  =(i.topics.log changed-keys)
       =/  who=@  (decode-topics topics.log ~[%uint])
       =+  ^-  [enc=octs aut=octs sut=@ud rev=@ud]
           %+  decode-results  data.log
           ~[[%bytes-n 32] [%bytes-n 32] %uint %uint]
       `[who %keys rev (pass-from-eth enc aut sut)]
     ::
-    ?:  =(event.log broke-continuity)
+    ?:  =(i.topics.log broke-continuity)
       =/  who=@  (decode-topics topics.log ~[%uint])
       =/  num=@  (decode-results data.log ~[%uint])
       `[who %continuity num]
     ::
-    ?:  =(event.log changed-management-proxy)
+    ?:  =(i.topics.log changed-management-proxy)
       =+  ^-  [who=@ sox=address]
           (decode-topics topics.log ~[%uint %address])
       `[who %management-proxy sox]
     ::
-    ?:  =(event.log changed-voting-proxy)
+    ?:  =(i.topics.log changed-voting-proxy)
       =+  ^-  [who=@ tox=address]
           (decode-topics topics.log ~[%uint %address])
       `[who %voting-proxy tox]
     ::
-    ?:  =(event.log changed-spawn-proxy)
+    ?:  =(i.topics.log changed-spawn-proxy)
       =+  ^-  [who=@ sox=address]
           (decode-topics topics.log ~[%uint %address])
       `[who %spawn-proxy sox]
     ::
-    ?:  =(event.log changed-transfer-proxy)
+    ?:  =(i.topics.log changed-transfer-proxy)
       =+  ^-  [who=@ tox=address]
           (decode-topics topics.log ~[%uint %address])
       `[who %transfer-proxy tox]
     ::
     ::  warn about unimplemented events, but ignore
     ::  the ones we know are harmless.
-    ~?  ?!  .=  event.log
+    ~?  ?!  .=  i.topics.log
             ::  OwnershipTransferred(address,address)
             0x8be0.079c.5316.5914.1344.cd1f.d0a4.f284.
               1949.7f97.22a3.daaf.e3b4.186f.6b64.57e0
-      [%unimplemented-event event.log]
+      [%unimplemented-event i.topics.log]
     ~
   ::
   ++  apply-point-diff
@@ -7749,11 +7749,12 @@
     ::
     ++  decode-topics
       ::  tox:  list of hex words
-      |*  [tox=(list @t) tys=(list etyp)]
-      =-  (decode-arguments - tys)
-      %+  roll  tox
-      |=  [top=@t tos=@t]
-      (cat 3 tos (rsh 3 2 top))
+      |*  [tox=(lest @ux) tys=(list etyp)]
+      =-  (decode-arguments (crip -) tys)
+      %+  render-hex-bytes  (mul 32 (lent tox))
+      %+  roll  `(list @ux)`tox
+      |=  [top=@ux tos=@]
+      (cat 8 top tos)
     ::
     ++  decode-results
       ::  rex:  string of hex bytes with leading 0x.
@@ -7920,8 +7921,16 @@
             ::
               address=@ux
               data=@t
-              event=@ux
-              topics=(list @t)
+              ::  event data
+              ::
+              ::    For standard events, the first topic is the event signature
+              ::    hash. For anonymous events, the first topic is the first
+              ::    indexed argument.
+              ::    Note that this does not support the "anonymous event with
+              ::    zero topics" case. This has dubious usability, and using
+              ::    +lest instead of +list saves a lot of ?~ checks.
+              ::
+              topics=(lest @ux)
           ==
         ::
         ::  data for eth_call.
@@ -8158,11 +8167,12 @@
           address+(cu hex-to-num so)
           data+so
         ::
-          ::TODO  doesn't account for the anonymous event case, which has no hash.
           =-  topics+(cu - (ar so))
           |=  r=(list @t)
+          ^-  (lest @ux)
           ?>  ?=([@t *] r)
-          [(hex-to-num i.r) t.r]
+          :-  (hex-to-num i.r)
+          (turn t.r hex-to-num)
       ==
     --
   ::