Basic Anticheat (Minecraft Bedrock)

// Declare variables for player position and velocity
Vector3 playerPos;
Vector3 playerVel;

// Set a threshold for maximum allowable velocity
float maxVel = 10.0;

// In the player's update function, get their current position and velocity
playerPos = player.getPosition();
playerVel = player.getVelocity();

// If the player's velocity is greater than the threshold, reset their velocity to 0
if (playerVel.length() > maxVel) {
  player.setVelocity(Vector3.ZERO);
  player.sendMessage("Cheat detected! Your velocity has been reset.");
}