How FeeShield works. All of it.

The Problem

Every major Solana trading platform charges a fee on every trade. When you buy or sell a token on Axiom, Uxento, or RapidLaunch, the platform silently adds a fee instruction to your transaction before it hits the blockchain. These fees range from 0.75% to 1.25% per trade.

For a trader doing 20 trades a day at 10 SOL per trade, that's 48 to 75 SOL per month going to the platform. At current SOL prices, that's thousands of dollars a month extracted from your trading activity.

These aren't Solana network fees (those are fractions of a cent). These are platform fees — the trading platform's revenue model, baked into every transaction you submit. FeeShield eliminates them.

What FeeShield Actually Is

FeeShield is a Chrome extension that sits between your browser and the trading platform's servers. When you click "Buy" or "Sell" on a supported platform, FeeShield intercepts the network request before it reaches the platform's backend.

Instead of letting the platform build your transaction (and bake their fee into it), FeeShield routes the trade through our own backend. Our backend builds the same transaction — same token, same amount, same slippage — but without the platform's fee instruction. The transaction goes directly to Solana.

After the trade executes, FeeShield sends a valid-looking success response back to the platform, so its UI updates normally. The platform sees a completed trade. You see a completed trade. The only difference: the fee that would have gone to the platform stays in your wallet.

How Interception Works

FeeShield uses a Chrome Manifest V3 content script that injects into supported trading platform pages. The extension operates at two levels:

Network-Level Interception

A MAIN world content script overrides the browser's native fetch() and XMLHttpRequest APIs, as well as the WebSocket constructor. This allows FeeShield to inspect every outgoing request and determine if it's a trade-related API call.

Per-Platform Translators

Each supported platform has its own translator module. These translators understand the platform's specific API format — REST endpoints, WebSocket events, request/response shapes — and convert them into a common internal format. When a trade request is intercepted, the translator extracts the token address, amount, trade type, and other parameters, then forwards them to our backend.

Platform-Specific Details

• Axiom — Intercepts fetch, XHR, WebSocket, and beacon requests. Parses serialized transactions from the request body. Wallet keys captured via crypto.subtle.decrypt() override.
• Uxento — Intercepts Socket.IO events (swap, create token). Uses Turnkey session relay for wallet access.
• RapidLaunch — Intercepts REST fetch/XHR calls. Wallet access via localStorage token.

The Trade Flow

Here's the exact sequence of events when you make a trade with FeeShield active:

Transaction Submission

Every trade is submitted through two paths simultaneously for maximum reliability:

• Jito bundle submission — Transaction bundled and sent to Jito block engine for MEV-protected inclusion
• Standard RPC fallback — Simultaneously sent to Solana RPC as backup

Priority Fees

Transactions include a compute budget of 400,000 compute units with a configurable priority fee. This is the standard Solana priority fee mechanism — it goes to validators, not to us. We also support optional Astralane tips for landing priority when needed.

Platform Fee Rates

These are the exact fee rates each platform charges. We verified these by inspecting on-chain transactions and platform source code. Every one of these fees is eliminated when you trade through FeeShield.

Platform	Buy Fee	Sell Fee	Create Fee	Min Fee	With FeeShield
Axiom	0.80%	0.80%	--	0.01 SOL	0%
Uxento	0.75%	0.75%	1.25%	0.01 SOL	0%
RapidLaunch	1.00%	1.00%	1.00%	0.01 SOL	0%

How Savings Are Calculated

Fee the platform would charge:
  platformFee = max(tradeAmount × feeRate, minFee)

Example: 10 SOL buy on RapidLaunch (1% fee rate):
  platformFee = max(10 × 0.01, 0.01) = 0.1 SOL

FeeShield fee (during launch): 0%
  feeShieldFee = 0 SOL

Your savings:
  saved = 0.1 - 0 = 0.1 SOL per trade

At 20 trades/day for 30 days:
  monthly savings = 0.1 × 600 = 60 SOL

Savings are calculated immediately when the trade is intercepted (estimated), then verified 5-15 seconds later by reading the actual on-chain transaction balances. Both values are stored — the verified number is what shows in your savings dashboard.

Security Model

Key Handling

FeeShield supports two signing modes depending on the platform:

• Client-side signing — Our backend builds an unsigned transaction and returns the message bytes to your browser. The extension signs the message locally using your captured wallet key, then sends only the signed transaction back for submission. Your private key never leaves the browser.
• Server-side signing — For certain platforms where the wallet credential is a session token (like Uxento's Turnkey sessions), the session is relayed to our backend which uses it to sign and submit the transaction. The session token is used only for the duration of the trade and is not stored.

Wallet Capture

To sign transactions, FeeShield needs access to the wallet the platform is using. Each platform stores wallet credentials differently:

• Axiom — Keys are encrypted in the browser using crypto.subtle. FeeShield intercepts the decryption call to capture the key when the platform itself decrypts it for signing.
• Uxento — Uses Turnkey MPC wallet sessions. FeeShield relays the session token.
• RapidLaunch — Uses a token stored in localStorage.

Authentication

FeeShield accounts use email + OTP verification or Phantom wallet authentication. Sessions are managed with JWT refresh tokens that rotate on each use. All communication between the extension and our backend uses HTTPS. You can log out at any time to revoke all active sessions.

On-Chain Verification

We don't just claim we removed the fee — we verify it on-chain. Five seconds after every trade, our automated fee audit system:

1. 1.Fetches the confirmed transaction from Solana
2. 2.Calculates SOL balance changes for every account in the transaction
3. 3.Classifies each recipient: your wallet, Jito tips, Solana protocol fees, DEX fees
4. 4.Checks every recipient against known platform fee addresses
5. 5.Flags any transaction where a platform fee address received SOL

If a platform fee address is detected in any transaction, it triggers an immediate alert in our monitoring system. This has never happened in production — but the check runs on every single trade.

Known Fee Addresses We Monitor

Axiom:        axm2JQY1FKEktAwgXWqjGYkkWsWPfwKzgbnGVt5kiP4
Uxento:       uxtoRPdPjRekYmxs1uUqVRZWh38iqonc9KgPuZXPeSY
RapidLaunch:  rapidXMVLw5uBieKHDGvF9k4xSSDXyD2FC5wLTAajaJV

If any of these addresses appear as recipients in a FeeShield-routed transaction, our system logs a fee leak alert. We also flag any unknown recipient that receives more than 5,000 lamports (0.000005 SOL) for manual review.

What We See & What We Don't

Full transparency on what data FeeShield processes:

What we see

• Your email address (for account login)
• Trade details: token address, amount, trade type (buy/sell/create)
• Transaction signatures (public on-chain data)
• Your wallet public address
• Which platform you traded on
• Extension diagnostics: errors, timing data, platform detection
• Fee savings calculations

What we don't see (or store)

• Your browsing history on any site
• Non-trade network requests (even on supported platforms)
• Traffic on non-supported websites — the extension doesn't activate
• Your portfolio balances or holdings
• Personal information beyond your email
• Private keys are not stored on our servers beyond transaction signing window

Revenue Model

Future Revenue

When we do introduce fees, here's exactly how it will work:

• FeeShield will take a small percentage of each trade — significantly less than the platform fee it replaces
• The fee will be clearly disclosed before it takes effect — no surprise charges
• You'll always save money compared to using the platform directly — that's the entire value proposition
• The fee is collected on-chain through our fee program (feesNomk...uL8), making it fully auditable

Our fee program supports tiered pricing (Bronze, Silver, Gold, Platinum, Diamond) and affiliate revenue sharing, though these features are not currently active. When enabled, high-volume traders will get lower rates, and referral partners can earn a share of fees from users they bring in.

Referral Program

FeeShield offers a referral program where you earn 10% of the fee savings generated by users you refer. Here's how it works:

• Generate a custom referral code from your FeeShield dashboard
• When someone signs up with your code and trades, you earn 10% of their savings
• Rewards are tracked per trade and can be claimed from the referral dashboard
• The referred user keeps their full savings — referral rewards come from FeeShield, not from the user

Example:
  Your referral signs up and buys 10 SOL on Axiom (0.8% fee)
  Their savings: 0.08 SOL
  Your reward:   0.008 SOL (10% of their savings)

  If they do 600 trades/month at 10 SOL:
  Their monthly savings: 48 SOL
  Your monthly reward:   4.8 SOL

Supported Platforms

FeeShield currently supports three Solana trading platforms. We are not affiliated with, endorsed by, or partnered with any of them.

Axiomaxiom.trade

Token trading (buy/sell). Interception covers all trade types including quick buys and limit orders.

Uxentoapp.uxento.io

Token swaps and token creation. Both swap and create events are intercepted via Socket.IO.

RapidLaunchrapidlaunch.io

Token trading and token creation via REST API interception.

On any non-supported platform, FeeShield is completely inactive. Your trades go through normally with no interception.

What Could Go Wrong

We believe in telling you the risks, not hiding them:

Roadmap

Where FeeShield is heading: