support prefix search for ids and authors (nip01 update).

filter.go

@@ -29,7 +29,7 @@ func (ef Filter) Matches(event *Event) bool {
 		return false
 	}
 
-	if ef.IDs != nil && !ef.IDs.Contains(event.ID) {
+	if ef.IDs != nil && !ef.IDs.ContainsPrefixOf(event.ID) {
 		return false
 	}
 
@@ -37,7 +37,7 @@ func (ef Filter) Matches(event *Event) bool {
 		return false
 	}
 
-	if ef.Authors != nil && !ef.Authors.Contains(event.PubKey) {
+	if ef.Authors != nil && !ef.Authors.ContainsPrefixOf(event.PubKey) {
 		return false
 	}
 

filter_aux.go

@@ -62,6 +62,15 @@ func (haystack StringList) Contains(needle string) bool {
 	return false
 }
 
+func (haystack StringList) ContainsPrefixOf(needle string) bool {
+	for _, hay := range haystack {
+		if strings.HasPrefix(needle, hay) {
+			return true
+		}
+	}
+	return false
+}
+
 func (haystack IntList) Contains(needle int) bool {
 	for _, hay := range haystack {
 		if hay == needle {