add wired-dwn

spatial/wit/wired-dwn/world.wit

@@ -0,0 +1,68 @@
+package wired:dwn;
+
+world host {
+  import api;
+  import dwn;
+}
+
+interface api {
+  use dwn.{dwn};
+
+  /// Get the local user's DWN.
+  local-dwn: func() -> dwn;
+
+  /// Get the local user's default world host DWN.
+  world-host-dwn: func() -> dwn;
+}
+
+interface dwn {
+  record encrypted-data {
+    alg: string,
+    ciphertext: string,
+    iv: string,
+    recipients: list<string>,
+    tag: string,
+  }
+
+  variant data {
+    base64(string),
+    encrypted(encrypted-data),
+  }
+
+  record message {
+    record-id: string,
+    data: option<data>
+  }
+
+  record status {
+    code: u16,
+    detail: option<string>,
+  }
+
+  record query-reply {
+    entries: list<message>,
+    status: status,
+  }
+
+  resource query {
+    poll: func() -> option<query-reply>;
+    finished: func() -> bool;
+  }
+
+  resource query-builder {
+    protocol: func() -> option<string>;
+    set-protocol: func(value: option<string>);
+
+    record-id: func() -> option<string>;
+    set-record-id: func(value: option<string>);
+
+    schema: func() -> option<string>;
+    set-schema: func(value: option<string>);
+
+    run: func() -> query;
+  }
+
+  resource dwn {
+    query: func() -> query-builder;
+  }
+}