minitel: ADA - Add better insight on the transaction purpose

src/lib/parseAdaTx.ts

@@ -1,6 +1,49 @@
-import { Transaction } from "@emurgo/cardano-serialization-lib-nodejs";
+import {
+	type Certificate,
+	Transaction,
+} from "@emurgo/cardano-serialization-lib-nodejs";
+
+const decodeOneCert = (cert: Certificate): Record<string, any> => {
+	const returnedCert: Record<string, any> = cert.to_js_value();
+	const keys = Object.keys(returnedCert);
+	for (let i = 0; i < keys.length; i++) {
+		const type = keys[i];
+		switch (type) {
+			case "StakeDelegation":
+				returnedCert[type].warning =
+					"⚠️ This certificate delegates stake to the given pool";
+				break;
+			case "StakeDeregistration":
+				returnedCert[type].warning =
+					"⚠️ This certificate deregisters stake from the given pool";
+				break;
+			case "...":
+				returnedCert[type].warning = "⚠️ ...";
+		}
+	}
+	return returnedCert;
+};
 
 export const parseAdaTx = async (txRaw: string): Promise<object> => {
-  const tx = Transaction.from_hex(txRaw);
-  return tx.to_js_value();
+	const tx = Transaction.from_hex(txRaw);
+	const body = tx.body();
+	const deserializedJson: Record<string, any> = {};
+	if (body.inputs().len()) {
+		// to force deserialization
+		deserializedJson.inputs = body.inputs().to_js_value();
+	}
+	if (body.outputs().len()) {
+		// to force deserialization
+		deserializedJson.outputs = body.outputs().to_js_value();
+	}
+	const certs = body.certs();
+	if (certs && certs.len() > 0) {
+		for (let i = 0; i < certs.len(); i++) {
+			const cert = certs.get(i);
+			deserializedJson.certs = deserializedJson.certs || [];
+			deserializedJson.certs.push(decodeOneCert(cert));
+		}
+	}
+
+	return deserializedJson;
 };