1 files changed, 18 insertions, 0 deletions
diff --git a/toolkit/components/uniffi-bindgen-gecko-js/src/templates/js/Float64.sys.mjs b/toolkit/components/uniffi-bindgen-gecko-js/src/templates/js/Float64.sys.mjs
new file mode 100644
index 0000000000..fc49046691
--- /dev/null
+++ b/toolkit/components/uniffi-bindgen-gecko-js/src/templates/js/Float64.sys.mjs
@@ -0,0 +1,18 @@
+// Export the FFIConverter object to make external types work.
+export class {{ ffi_converter }} extends FfiConverter {
+    static computeSize() {
+        return 8;
+    }
+    static lift(value) {
+        return value;
+    }
+    static lower(value) {
+        return value;
+    }
+    static write(dataStream, value) {
+        dataStream.writeFloat64(value)
+    }
+    static read(dataStream) {
+        return dataStream.readFloat64()
+    }
+}