BLOCKCHAIN & SMART CONTRACT AUDITS

Secure Your dApp.
Scale to Mainnet.

You built your Web3 prototype with AI. We engineer it for high-volume transactions, audit smart contracts, and shield you from frontrunning.

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001 // The Audit Suite

dApp Vulnerability scanning

Select a risk below to view how we scan for issues and refactor the code to achieve production safety.

VULNERABILITY DETECTED SEVERITY: HIGH

RPC Endpoint Leak & Rate Limiting

Exposing raw blockchain node endpoints in frontend codebase allows malicious users to hijack keys, bypass rate limits, or perform billing exploits. 

// Vulnerable React Setup
const provider = new ethers.JsonRpcProvider("https://mainnet.infura.io/v3/9aa2...85a");
// Anyone inspecting the network tabs can copy this key and exploit it!
PROMPTSCALE REMEDIATION IMPACT Sets up a backend validation routing proxy that shields keys and throttles bots.
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002 // Web3 Engineering Guides

How-To Articles

Actionable tutorials detailing production-grade patterns for blockchain frontends and contract routing. Fully indexed for crawlers.

FRONTEND 6 MIN READ PUBLISHED JUNE 15, 2026

How to Secure Your dApp's Frontend Against RPC Hijacking

When building decentralized frontends with libraries like Ethers.js or Viem, developers frequently hardcode RPC Node provider URLs (such as Alchemy or Infura endpoints) straight into their codebase. This common pattern is highly vulnerable.

The Vulnerability Vector

Because all frontend JS is public, an attacker can extract your private API key directly from browser script network inspect tabs. With it, they can hijack your rate limits, drain your paid RPC tier, or execute DDoS queries targeting your application.

The Production-Ready Fix

To protect your RPC configuration, implement a middleware routing function. Instead of making raw JSON-RPC requests directly from the browser, connect your frontend to a local serverless path (e.g. `/api/rpc`). Your backend function receives the RPC queries, appends your private API key, and forwards it safely to the blockchain.

By PromptScale Eng
SOLIDITY & EVM 8 MIN READ PUBLISHED JUNE 15, 2026

Mitigating MEV: Slippage Protection & Private Transactions

Decentralized swap components (e.g., integrating Uniswap or Sushiswap) are highly targets for bots executing Maximal Extractable Value (MEV) strategies. Sandwich attacks are the most common form of MEV exploitation.

The Vulnerability Vector

If a dApp sends a transaction to a public mempool with an unset or loose slippage threshold (e.g., `amountOutMin = 0`), MEV searcher bots will frontrun the transaction by buying the asset to drive up the price, let your transaction execute at the worst rate, and immediately backrun to lock in profits.

The Production-Ready Fix

Always calculate strict output bounds on the frontend using contract state oracle checks. Additionally, instead of sending transactions directly to public Ethereum/Polygon node structures, configure your client-side wallet connectors to dispatch transaction hashes via private RPC relays like Flashbots Protect. This hides your transactions from public searcher pools until the block is successfully mined.

By PromptScale Eng
003 // Web3 Engagement

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Audit & Refactor.

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