Can server anticheats block Fast Place / Fast Use Delay Bypass?

Server-side anticheats monitor movement and packet anomalies, while static analysis with Leaf Mod Analyzer identifies hostile and unfair code before mods are loaded.

Fast Place / Fast Use Delay Bypass

Q: How does Leaf Mod Analyzer detect Fast_Place_Delay_Bypass?

Leaf Mod Analyzer performs static analysis of JVM bytecode and decompiled AST structures matching Matches Mixin @Accessor targeting MinecraftClient.itemUseCooldown (field_1752). in an isolated environment without executing untrusted JAR files.

🎮 Minecraft Gameplay Impact

Bypasses vanilla 4-tick right-click delay by resetting MinecraftClient.itemUseCooldown via Mixin Accessor, enabling machine-gun block placement, rapid EXP bottle throwing, and instant crystal spam.

🔍 Functions & APIs Analyzed

MinecraftClient.itemUseCooldown

Cooldown timer (field_1752) limiting right-click item action frequency.

@Accessor("itemUseCooldown")

Mixin field accessor exposing itemUseCooldown for external reset.

💻 Mod Implementation (Dev Source / Mapped)

// Developer Source (Fabric / Yarn mappings)
@Mixin(MinecraftClient.class)
public interface MinecraftClientAccessor {
    @Accessor("itemUseCooldown")
    void setItemUseCooldown(int cooldown);
}

⚙️ Decompiled Representation (Vineflower View)

// Decompiled with Vineflower 1.12 (Intermediary mappings)
@Mixin({class_310.class})
public interface MinecraftClientAccessor {
    @Accessor("field_1752")
    void setItemUseCooldown(int value);
}

🛡️ Bytecode Signature & Static Detection

Matches Mixin @Accessor targeting MinecraftClient.itemUseCooldown (field_1752).