AnySync Basic code example.

using UnityEngine;
using UnityEngine.Networking;

namespace AnySync.Examples
{
    /// <summary>
    /// Basic example using the easiest possible techniques.
    /// Some best practices are ignored in favor of shorter code.
    /// </summary>
    public class UNetRigidbody2DSync : NetworkBehaviour
    {
        // Up to 10 messages per second.
        private const float MinimumSendInterval = 0.1f;
        private const float CharacterSpeed = 3f;
        private const float JumpVelocity = 7f;

        private readonly MotionGenerator _motionGenerator = new MotionGenerator();

        private float _timeSinceLastSync;
        private void Update()
        {
            if (hasAuthority)
            {
                // Local movement.

                var rigidbody2DComponent = GetComponent<Rigidbody2D>();

                // Get original velocity.
                var rigidbody2DVelocity = rigidbody2DComponent.velocity;

                // Modify velocity according to input.
                rigidbody2DVelocity.x = Input.GetAxisRaw("Horizontal") * CharacterSpeed;
                if (Input.GetButtonDown("Jump"))
                    rigidbody2DVelocity.y = JumpVelocity;

                // Apply velocity change.
                rigidbody2DComponent.velocity = rigidbody2DVelocity;

                // Sync position.
                _timeSinceLastSync += Time.deltaTime;
                if (_timeSinceLastSync >= MinimumSendInterval)
                {
                    CmdSync(_timeSinceLastSync, transform.position);
                    _timeSinceLastSync = 0f;
                }
            }
            else
            {
                // Proxy movement.

                // Avoid warnings if syncBuffer is empty.
                if (_motionGenerator.HasKeyframes)
                {
                    // Update playback and apply new position.
                    _motionGenerator.UpdatePlayback(Time.deltaTime);
                    transform.position = _motionGenerator.Position;
                }
            }
        }

        [Command]
        private void CmdSync(float interpolationTime, Vector2 position)
        {
            // Add keyframe to buffer on server.
            _motionGenerator.AddKeyframe(interpolationTime, position);
            // Send it to other clients.
            RpcSync(interpolationTime, position);
        }

        [ClientRpc]
        private void RpcSync(float interpolationTime, Vector2 position)
        {
            // Prevent receiving keyframes on owner client and host.
            if (isLocalPlayer || isServer)
                return;

            // Add keyframe to buffer on clients.
            _motionGenerator.AddKeyframe(interpolationTime, position);
        }
    }
}