> For the complete documentation index, see [llms.txt](https://docs.dexcoin.app/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.dexcoin.app/user-guide/swap/bot-shield.md).

# Bot Shield

Miner Extractable Value (MEV) in blockchains like Ethereum, allows miners to decide the order of transactions within a block. This feature introduces potential vulnerabilities in the decentralised exchange (DEX) transactions.

An attacker will rearrange transactions to swap a cryptocurrency just before your order, taking advantage of the price change and making a profit at your expense.

Such vulnerabilities may lead to significant financial setbacks, with **potential losses of up to 90%** in certain scenarios**.** Consider a situation where users **receive 100 USDT for 1000 USDC** due to a **lack of Auto Slippage and MEV protection** – a real occurrence for numerous victims.

<mark style="color:blue;">Fear not, as DEXCoinApp Bot Shield feature automatically protects your every swap from Front-Running and Sandwich bot attacks.</mark>&#x20;

Auto Slippage keeps the base slippage to 0.1% and includes token fee if any, to completely minimise the loss. Swap transactions are directly broadcasted to the miner rather than to the public mempool, this prevents transactions from being frontrun by frontrunners.


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