1 files changed, 24 insertions, 0 deletions
diff --git a/toolkit/components/uniffi-bindgen-gecko-js/src/templates/js/String.jsm b/toolkit/components/uniffi-bindgen-gecko-js/src/templates/js/String.jsm
new file mode 100644
index 0000000000..c2b231c9b4
--- /dev/null
+++ b/toolkit/components/uniffi-bindgen-gecko-js/src/templates/js/String.jsm
@@ -0,0 +1,24 @@
+class FfiConverterString extends FfiConverter {
+    static lift(buf) {
+        const decoder = new TextDecoder();
+        const utf8Arr = new Uint8Array(buf);
+        return decoder.decode(utf8Arr);
+    }
+    static lower(value) {
+        const encoder = new TextEncoder();
+        return encoder.encode(value).buffer;
+    }
+
+    static write(dataStream, value) {
+        dataStream.writeString(value);
+    }
+
+    static read(dataStream) {
+        return dataStream.readString();
+    }
+
+    static computeSize(value) {
+        const encoder = new TextEncoder();
+        return 4 + encoder.encode(value).length
+    }
+}