Function buildMockChannelWindowBounds

desktop/src/testing/e2eBridge.ts:3822–3843

* Build the single kind-39006 bounds event a channel window response must carry. * The `d` tag key must match `expectedBoundsKey` in channelWindowResponse.ts: * ` :head` at the frontier, else ` : : ` of * the request cursor (lower-cased). `has_more`/`next_curso

(
  args: {
    channelId: string;
    cursor?: { created_at: number; event_id: string } | null;
  },
  hasMore: boolean,
  nextCursor: { created_at: number; id: string } | null,
)

 * parser rejects a bounds event where they disagree.
 */
function buildMockChannelWindowBounds(
  args: {
    channelId: string;
    cursor?: { created_at: number; event_id: string } | null;
  },
  hasMore: boolean,
  nextCursor: { created_at: number; id: string } | null,
): RelayEvent {
  const suffix = args.cursor
    ? `${args.cursor.created_at}:${args.cursor.event_id.toLowerCase()}`
    : "head";
  const boundsKey = `${args.channelId.toLowerCase()}:${suffix}`;
  return {
    id: `mock-window-bounds-${boundsKey}`,
    pubkey: DEFAULT_MOCK_IDENTITY.pubkey,
    created_at: Math.floor(Date.now() / 1000),
    kind: KIND_CHANNEL_WINDOW_BOUNDS,
    tags: [["d", boundsKey]],
    content: JSON.stringify({ has_more: hasMore, next_cursor: nextCursor }),
    sig: "mocksig".repeat(20).slice(0, 128),
  };
}

/**
 * one server-assembled channel window over the `/query` bridge. Emits the flat