Spark毫无意义，愣是把自己加到L2

展开说说👀

都是用submarine swap🎭，lightning才是L2

Spark 第一次听说。确实感觉不好用。 will前两天转了一个Ark的最新协议文档，应该不是基于LN的上层应用，而是可以和LN互通的L2

Second Docs

Intro to the Ark protocol | Second Docs

A brief primer for the basic concepts of the Ark protocol. Learn the mechanics of how Ark makes bitcoin payments fast, cheap, and self-custodial.

Just as a Cashu wallet mainly facilitates transfers within the mint, Spark also primarily handles internal transfers, with receiving and sending payments via the Lightning Network being relatively rare. Cashu, Spark, and Ark all use a server–client architecture, and the user experience for internal transfers can be very smooth. Spark and Ark are both designed for users who do not have their own Lightning channels.

The Lightning Network remains the most secure option. From a purely technical perspective, many so‑called Layer 2 designs aim to perform more actions off‑chain from a single on‑chain UTXO operation, thereby reducing the burden on the base layer. This is likely one reason they are grouped under the “Layer 2” label. However, my view comes from another angle. When it comes to Bitcoin usage, most alternatives to Lightning require introducing a pre‑defined third‑party trust model. These third parties are ultimately legal entities, which means that the assets flowing within such systems are only nominally Bitcoin. Service providers in these designs often have the ability to censor or freeze transactions under certain circumstances. Even if users retain some form of unilateral exit, Bitcoin itself is inherently supra‑sovereign, whereas the security of these systems falls below that threshold. In contrast, Lightning transactions represent actual Bitcoin, and the risk of attack is highly localized. By comparison, centralized service providers present larger attack surfaces. From this perspective, I see non‑Lightning solutions more as on‑chain extensions that trade some security for additional functionality, whereas Lightning is the only true Layer 2. For most users, the majority of their Bitcoin will likely remain either on‑chain or in Lightning channels, rather than locked in these alternative systems, which act more like specialized functionality bridges. In terms of design, compatibility with Lightning atomic swaps exists mainly for interoperability; in practical payment use cases, these solutions tend to operate around Lightning rather than replace it.

我也觉得Spark没什么意义，和闪电同期生才这发展水平，用户其实已经投票了，很多时候技术只是其中一方面。 这些方案都是围绕在闪电周围通过原子互换去兼容，就支付而言，不兼容闪电可以直接去投胎了，最终用户钱其实还是留在链上和闪电上。闪电是超主权的，其他方案都是主权以下的，这一个区别就拉开层次了。 Ark目前看很不错，看后续发展了，比较担心ASP中心化甚至趋向高度中心化。