Move Language Security on Aptos

Introduction

Move is a smart contract language designed with safety in mind. Its resource-oriented programming model eliminates many common vulnerabilities found in other languages.

Move Safety Features

• Linear type system prevents asset duplication
• No dynamic dispatch eliminates reentrancy
• Formal verification built into the language
• Strong module encapsulation

module example::token {
    // Resources cannot be copied or discarded
    struct Coin has store {
        value: u64
    }
    
    // Transfer is guaranteed to be atomic
    public fun transfer(
        coin: Coin, 
        recipient: &signer
    ): Coin {
        // Coin must be explicitly handled
        // Cannot be duplicated or lost
        coin
    }
}