fix: add redstone.ts script

Author: Van0k

script/redstone.ts

@@ -0,0 +1,66 @@
+import { DataServiceWrapper } from "@redstone-finance/evm-connector/dist/src/wrappers/DataServiceWrapper";
+import { ethers } from "ethers";
+import { arrayify } from "ethers/lib/utils";
+import { RedstonePayloadParser } from "redstone-protocol/dist/src/redstone-payload/RedstonePayloadParser";
+
+async function getRedstonePayloadForManualUsage(
+  dataServiceId: string,
+  dataFeed: string,
+  signersCount: number,
+): Promise<string> {
+  // REDSTONE_GATEWAYS env variable can be used to provide local caching proxies that prevent rate limiting
+  // it's passed when attach tests are executed on testnets
+  const gateways = process.env.REDSTONE_GATEWAYS
+    ? process.env.REDSTONE_GATEWAYS.split(",")
+    : undefined;
+  const dataPayload = await new DataServiceWrapper({
+    dataServiceId,
+    dataFeeds: [dataFeed === "STETH" ? "stETH" : dataFeed],
+    uniqueSignersCount: signersCount,
+    urls: gateways,
+  }).prepareRedstonePayload(true);
+
+  const parser = new RedstonePayloadParser(arrayify(`0x${dataPayload}`));
+  const { signedDataPackages } = parser.parse();
+
+  let dataPackageIndex = 0;
+  let ts = 0;
+  for (const signedDataPackage of signedDataPackages) {
+    const newTimestamp =
+      signedDataPackage.dataPackage.timestampMilliseconds / 1000;
+
+    if (dataPackageIndex === 0) {
+      ts = newTimestamp;
+    } else if (ts !== newTimestamp) {
+      throw new Error("Timestamps are not equal");
+    }
+
+    ++dataPackageIndex;
+  }
+
+  const result = ethers.utils.defaultAbiCoder.encode(
+    ["uint256", "bytes"],
+    [ts, arrayify(`0x${dataPayload}`)],
+  );
+
+  return result;
+}
+
+if (process.argv.length !== 5) {
+  console.error(
+    "Usage: npx node redstone.ts  <data-service-id> <data-feed-id> <num-signers>",
+  );
+  process.exit(1);
+}
+
+getRedstonePayloadForManualUsage(
+  process.argv[2],
+  process.argv[3],
+  Number(process.argv[4]),
+)
+  .then(payload => {
+    console.log(`${payload}`);
+  })
+  .catch(error => {
+    console.error(error);
+  });