add gs++ example

README.md

@@ -26,6 +26,7 @@ The following examples are provided in the examples directory:
  - `2-validate-tx-rpc-burn-valid-allow.ts`: Allows sending a valid burn transaction
  - `3-validate-txid-rpc.ts`: Traditional SLP validate method by txid (offers no extra burn protection).
  - `4-validate-txid-bchd.ts`: Similar to example 3, but uses BCHD's gRPC instead of JSON RPC.
+ - `5-validate-txid-gs++.ts`: Validate more quickly by downloading transactions in bulk from SLP graph search instead of downloading transactions individually via RPC.
 
 
 

examples/5-validate-txid-gs++.ts

@@ -0,0 +1,41 @@
+/***************************************************************************************
+ * 
+ *  Example 5: Validate using gs++ server.
+ * 
+ *  Instructions:
+ *      (1) - Optional: Setup SLP graph search server URL
+ *      (2) - Optional: set custom txid.
+ * 
+ * ************************************************************************************/
+
+import { ValidatorType1, Crypto } from '../index';
+import { GraphSearchClient } from 'grpc-slp-graphsearch-node';
+
+const txid = "ecaaf0a4de119a59a440089c99a2c103791dbd06086472ff8ff4229c5cd7cc4f";
+
+(async function() {
+    console.time("SLP-VALIDATE-W-GRAPH-SEARCH");
+
+    // perform graph search
+    let gs = new GraphSearchClient(); // optional set server url
+    let dag = new Map<string, Buffer>();
+    (await gs.graphSearchFor(txid)).getTxdataList_asU8().forEach(txn => { 
+        let txnBuf = Buffer.from(txn);
+        let id = Crypto.hash256(txnBuf).toString('hex');
+        dag.set(id, txnBuf);
+    });
+
+    // create SLP validator
+    let getRawTransaction =  async (id: string) => {
+        if(dag.has(id)) return dag.get(id)!;
+        else return Buffer.alloc(60);
+    }
+    const slpValidator = new ValidatorType1({ getRawTransaction });
+
+    console.log("Validating:", txid);
+    console.log("This may take a several seconds...");
+    let isValid = await slpValidator.isValidSlpTxid({ txid });
+    console.log("Final Result:", isValid);
+    console.log("WARNING: THIS VALIDATION METHOD COMES WITH NO BURN PROTECTION.")
+    console.timeEnd("SLP-VALIDATE-W-GRAPH-SEARCH");
+})();