Moved adapter wrapping to its own file

src/adapter_wrapper.mjs

@@ -0,0 +1,36 @@
+export function wrapAdapter(adapter) {
+  const wrapped = {};
+
+  ["name", "open", "close", "delete", "sql"].forEach((prop) => {
+    if (!(prop in adapter)) {
+      throw new PawSQLiteError(`Invalid adapter: missing property: ${ prop }`);
+    }
+
+    if (
+      prop === "name" && !(
+        typeof adapter[prop] === "string" ||
+        adapter[prop] instanceof String
+      ) ||
+      prop !== "name" && (
+        typeof adapter[prop] !== "function"
+      )
+    ) {
+      throw new PawSQLiteError("Invalid adapter: invalid type for property: " +
+        prop);
+    }
+
+    if (typeof adapter[prop] === "function") {
+      wrapped[prop] = async (...args) => {
+        try {
+          return await adapter[prop](...args);
+        } catch (err) {
+          throw PawSQLiteError.from(err);
+        }
+      };
+    } else {
+      wrapped[prop] = adapter[prop];
+    }
+  });
+
+  return wrapped;
+}