test: add relay to para e2e script

test/scripts/polkadot/relay_para.js

@@ -0,0 +1,83 @@
+import { ApiPromise, WsProvider, Keyring } from "@polkadot/api";
+import { Builder } from "@paraspell/sdk";
+
+async function testRelayToPara() {
+  console.log("*".repeat(100));
+  console.log("Demo on Sending tokens from Relaychain to Parachain. \n");
+  console.log("*".repeat(100), "\n");
+
+  console.log("Establishing connection to Relaychain....");
+  let relayWsProvider = new WsProvider("ws://127.0.0.1:32883");
+  const relayaAPI = await ApiPromise.create({ provider: relayWsProvider });
+
+  const relayBlock = await relayaAPI.rpc.chain.getBlock();
+  console.log(
+    "Latest Relaychain Block Height: ",
+    relayBlock.block.header.number.toHuman(),
+    "\n"
+  );
+
+  console.log("Establishing connection to Parachain....");
+  let paraWsProvider = new WsProvider("ws://127.0.0.1:32886");
+  const paraAPI = await ApiPromise.create({
+    provider: paraWsProvider,
+    noInitWarn: true,
+  });
+
+  const paraBlock = await paraAPI.rpc.chain.getBlock();
+  console.log(
+    "Latest Para Chain Block Height: ",
+    paraBlock.block.header.number.toHuman(),
+    "\n"
+  );
+  const accountAddress = "gXCcrjjFX3RPyhHYgwZDmw8oe4JFpd5anko3nTY8VrmnJpe";
+  console.log(
+    "Destination Para Chain Account Address : ",
+    accountAddress,
+    "\n"
+  );
+
+  const initialBal = await paraAPI.query.tokens.accounts(accountAddress, {
+    token: "KSM",
+  });
+  console.log(
+    "Initial KSM Balance on Destination chain : ",
+    initialBal.free.toHuman()
+  );
+
+  console.log(
+    "Building an XCM call to transfer asset from Relaychain to Parachain...\n"
+  );
+  const call = Builder(relayaAPI)
+    .to("Karura", 2000) // Destination Parachain and Para ID
+    .amount(10000000000000) // Token amount
+    .address("oQQwUS5xJwHYbx97jiU1YrnHN1L7PYaD4Uof8un6Hua5EqV") // AccountId32 or AccountKey20 address
+    .build(); // Function called to build call
+
+  console.log("Getting Alice address to sign and send the transaction.. \n");
+  const keyring = new Keyring({ type: "sr25519" });
+  const alice = keyring.addFromUri("//Alice");
+  console.log("Alice Address : ", alice.address, "\n");
+
+  const hash = await call.signAndSend(alice);
+  console.log(
+    "Transaction Successfully submitted. \nHash: ",
+    JSON.stringify(hash)
+  );
+  relayaAPI.disconnect();
+
+  // TODO: Listen for events and then check final Balance
+  await new Promise((f) => setTimeout(f, 25000));
+
+  const finalBal = await paraAPI.query.tokens.accounts(accountAddress, {
+    token: "KSM",
+  });
+  console.log(
+    "KSM Balance on Destination chain after transfer: ",
+    finalBal.free.toHuman()
+  );
+
+  paraAPI.disconnect();
+}
+
+testRelayToPara();