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eventstore: index tag letter together with the value.

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fiatjaf
2025-06-10 13:46:29 -03:00
parent 287d8c23c7
commit e9a08d669e
8 changed files with 250 additions and 98 deletions
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eventstore/badger/helpers.go
+24 -17
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@@ -11,30 +11,35 @@ import (
"fiatjaf.com/nostr"
)
func getTagIndexPrefix(tagValue string) ([]byte, int) {
func getTagIndexPrefix(tagName string, tagValue string) ([]byte, int) {
var k []byte // the key with full length for created_at and idx at the end, but not filled with these
var offset int // the offset -- i.e. where the prefix ends and the created_at and idx would start
letterPrefix := byte(int(tagName[0]) % 256)
if kind, pkb, d := getAddrTagElements(tagValue); len(pkb) == 32 {
// store value in the new special "a" tag index
k = make([]byte, 1+2+8+len(d)+4+4)
// store value in the new special "a"-style tag index
k = make([]byte, 1+1+2+8+len(d)+4+4)
k[0] = indexTagAddrPrefix
binary.BigEndian.PutUint16(k[1:], uint16(kind))
copy(k[1+2:], pkb[0:8])
copy(k[1+2+8:], d)
offset = 1 + 2 + 8 + len(d)
k[1] = letterPrefix
binary.BigEndian.PutUint16(k[1+1:], uint16(kind))
copy(k[1+1+2:], pkb[0:8])
copy(k[1+1+2+8:], d)
offset = 1 + 1 + 2 + 8 + len(d)
} else if vb, _ := hex.DecodeString(tagValue); len(vb) == 32 {
// store value as bytes
k = make([]byte, 1+8+4+4)
// store value as bytes with tag name prefix
k = make([]byte, 1+1+8+4+4)
k[0] = indexTag32Prefix
copy(k[1:], vb[0:8])
offset = 1 + 8
k[1] = letterPrefix
copy(k[2:], vb[0:8])
offset = 1 + 1 + 8
} else {
// store whatever as utf-8
k = make([]byte, 1+len(tagValue)+4+4)
// store whatever as utf-8 with tag name prefix
k = make([]byte, 1+1+len(tagValue)+4+4)
k[0] = indexTagPrefix
copy(k[1:], tagValue)
offset = 1 + len(tagValue)
k[1] = letterPrefix
copy(k[2:], tagValue)
offset = 1 + 1 + len(tagValue)
}
return k, offset
@@ -102,7 +107,9 @@ func (b *BadgerBackend) getIndexKeysForEvent(evt nostr.Event, idx []byte) iter.S
}
}
firstIndex := slices.IndexFunc(evt.Tags, func(t nostr.Tag) bool { return len(t) >= 2 && t[1] == tag[1] })
firstIndex := slices.IndexFunc(evt.Tags, func(t nostr.Tag) bool {
return len(t) >= 2 && t[0] == tag[0] && t[1] == tag[1]
})
if firstIndex != i {
// duplicate
continue
@@ -114,7 +121,7 @@ func (b *BadgerBackend) getIndexKeysForEvent(evt nostr.Event, idx []byte) iter.S
}
// get key prefix (with full length) and offset where to write the last parts
k, offset := getTagIndexPrefix(tag[1])
k, offset := getTagIndexPrefix(tag[0], tag[1])
// write the last parts (created_at and idx)
binary.BigEndian.PutUint32(k[offset:], uint32(evt.CreatedAt))