> For the complete documentation index, see [llms.txt](https://lens-project.gitbook.io/lens-project-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://lens-project.gitbook.io/lens-project-docs/documentation/lens-sniper.md).

# Lens Sniper

#### How it works

Each user gets a dedicated Solana keypair generated and encrypted server-side using AES-256 (Fernet). The private key never leaves the server in plain text.

**Buying** - users tap a buy button on any alert. Lens fetches a quote from Jupiter, builds and signs the transaction, and submits it on-chain. Confirmation is polled until the transaction is verified.

**Selling** - users can sell 25%, 50%, or 100% of any position directly from the bot. Custom percentages are also supported.

**Route fallback** - if Jupiter fails, Lens automatically retries via Raydium, then falls back to pump.fun's bonding curve API for pump.fun tokens.

**Withdrawals** - users can withdraw SOL to any external wallet at any time.

#### Take Profit / Stop Loss

Premium and alpha users can configure automatic TP/SL:

* Take Profit triggers when a position is up by a set percentage
* Stop Loss triggers when a position is down by a set percentage
* Both support partial sells (e.g. sell 50% at TP, keep the rest)

#### Auto Buy

Alpha users can enable Auto Buy - every alert from tracked wallets automatically triggers a buy for a configured SOL amount. Dedup logic prevents the same token from being bought twice within 24 hours.

#### Dev Fee

A 1% fee is collected on buys and sells to fund ongoing development. The fee is sent as a separate transaction after the trade confirms.


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