Refactor, Added documentation, moved from avj-cli to avj, update script and added tests

source/template/identifier.ts

@@ -0,0 +1,22 @@
+import { binToHex, sha256, utf8ToBin } from '@bitauth/libauth';
+import type { XOTemplate } from '@xo-cash/types';
+import { serializeTemplate } from './serialization.ts';
+
+/**
+ * Generates a deterministic template identifier by hashing the template.
+ *
+ * Note: This expects a template that has been validated by `parseTemplate`.
+ *
+ * @param template - The template to generate an identifier for.
+ * @returns The sha256 hex identifier for the template.
+ */
+export const generateTemplateIdentifier = (template: XOTemplate): string => {
+    // Serialize the template.
+    const serializedTemplate = serializeTemplate(template);
+
+    // Hash the serialized template.
+    const hash = sha256.hash(utf8ToBin(serializedTemplate));
+
+    // Convert the hash to hex and return it.
+    return binToHex(hash);
+};