Solana pass fixture

A textbook-safe Solana skill. Connects to two RPCs (Helius + QuickNode) for dual-source slot comparison, never inlines private keys, never combines nonce + authority operations.

RPC setup

import { Connection } from "@solana/web3.js";

const primary = new Connection("https://mainnet.helius-rpc.com/?api-key=REDACTED");
const fallback = new Connection("https://x402.quicknode.com/?token=REDACTED");

async function safeSlot(): Promise<number> {
  const [a, b] = await Promise.all([primary.getSlot(), fallback.getSlot()]);
  if (Math.abs(a - b) > 5) throw new Error("RPC providers disagree on slot");
  return a;
}

Priority fee (bounded)

// Bounded at 50_000 microLamports — well under the 100k threshold.
ComputeBudgetProgram.setComputeUnitPrice({ microLamports: 50000 });

Oracle read with staleness check

const price = priceFeed.getPriceNoOlderThan(60);

Approve to system token program (allowlisted)

createApproveInstruction(account, TOKEN_PROGRAM_ID, BigInt("0xffffffffffffffff"));