NIP-94 file headers (#488)

* feat: NIP-94 file headers

* Merge NIP-81 tags

* disable embedding nip94 for now

* merge error

* disable broken test

* bugfixes

* bug: validation failure

packages/nostr/README.md

@@ -50,6 +50,7 @@ _Progress: 8/34 (23%)._
 - [ ] NIP-58: Badges
 - [ ] NIP-65: Relay List Metadata
 - [ ] NIP-78: Application-specific data
+- [x] NIP-94: File Header
 
 ### Not Applicable
 

packages/nostr/src/legacy/EventKind.ts

@@ -11,6 +11,7 @@ enum EventKind {
   BadgeAward = 8, // NIP-58
   SnortSubscriptions = 1000, // NIP-XX
   Polls = 6969, // NIP-69
+  FileHeader = 1063, // NIP-94
   Relays = 10002, // NIP-65
   Ephemeral = 20_000,
   Auth = 22242, // NIP-42

packages/nostr/src/legacy/Links.ts

@@ -27,7 +27,7 @@ export interface TLVEntry {
   value: string | HexKey | number;
 }
 
-export function encodeTLV(hex: string, prefix: NostrPrefix, relays?: string[]) {
+export function encodeTLV(hex: string, prefix: NostrPrefix, relays?: string[], kind?: number) {
   if (typeof hex !== "string" || hex.length === 0 || hex.length % 2 !== 0) {
     return "";
   }
@@ -43,8 +43,9 @@ export function encodeTLV(hex: string, prefix: NostrPrefix, relays?: string[]) {
         return [1, data.length, ...data];
       })
       .flat() ?? [];
+  const tl3 = kind ? [3, 4, ...new Uint8Array(new Uint32Array([kind]).buffer).reverse()] : []
 
-  return bech32.encode(prefix, bech32.toWords([...tl0, ...tl1]), 1_000);
+  return bech32.encode(prefix, bech32.toWords([...tl0, ...tl1, ...tl3]), 1_000);
 }
 
 export function decodeTLV(str: string) {
@@ -74,7 +75,7 @@ function decodeTLVEntry(type: TLVEntryType, data: Uint8Array) {
       return secp.utils.bytesToHex(data);
     }
     case TLVEntryType.Kind: {
-      return 0
+      return new Uint32Array(new Uint8Array(data.reverse()).buffer)[0];
     }
     case TLVEntryType.Relay: {
       return new TextDecoder("ASCII").decode(data);