Solana archive RPC node finder

readme.md

Solana RPC nodes finder

• Fetch cluster nodes.
• Filter them by the .rpc field.
• Try to connect and call getFirstAvailableBlock().
• Save to a CSV file: rpc-nodes.csv.

Prerequisites

Ensure you have the following installed:

• Deno

Running the Script

Execute the script using Deno:

deno run --allow-net --allow-write main.ts

main.ts

import * as web3 from "npm:@solana/web3.js";

const MAINNET = "https://api.mainnet-beta.solana.com";
const CSV_FILE_NAME = "rpc-nodes.csv";

const connection = new web3.Connection(MAINNET);
const cluster_nodes = await connection.getClusterNodes();
const nodes_with_rpc = cluster_nodes.filter((node) => !!node.rpc);
nodes_with_rpc.push({ rpc: MAINNET } as web3.ContactInfo);

console.log("> Found", nodes_with_rpc.length, "nodes with RPC");

const data: Array<[string, number]> = [];

function withTimeout<T>(promise: Promise<T>, timeout = 30_000): Promise<T> {
  return new Promise((resolve, reject) => {
    const timer = setTimeout(() => {
      reject(new Error("сonnection timeout exceeded"));
    }, timeout);

    promise.then(resolve, reject).finally(() => clearTimeout(timer));
  });
}

await Promise.all(
  nodes_with_rpc.map(async (node, i) => {
    try {
      console.log(`> Connecting to node ${i + 1}/${nodes_with_rpc.length}`);

      const rpc_url = node.rpc?.startsWith("http")
        ? node.rpc
        : `http://${node.rpc}`;

      const rpc_connection = new web3.Connection(rpc_url);
      const first_available_block = await withTimeout(
        rpc_connection.getFirstAvailableBlock()
      );

      data.push([rpc_url, first_available_block]);
    } catch (e) {
      console.error("> Error:", node.rpc, '|', (e as Error).message);
    }
  })
);

console.log("> Active nodes with RPC:", data.length);

const CSV_HEADERS = ["rpc_url", "first_available_block"];
const CSV_DATA = [
  CSV_HEADERS.join(","),
  ...data
    .sort((a, b) => Number(a[1]) - Number(b[1]))
    .map((row) => row.join(",")),
];

Deno.writeTextFile(CSV_FILE_NAME, CSV_DATA.join("\n"));
console.log(`> Saved to ${CSV_FILE_NAME}`);

rpc-nodes.csv