In our previous session, we successfully concluded key concepts related to security. Today, we begin a new topic—settlement. In blockchain systems, “settlement” is a crucial yet often overlooked concept. Compared to settlement, most users tend to focus more on: Transaction speed Fees User experience The reason is simple—these are directly محسوس by users. If transactions are slow, it’s frustrating; if fees are high, users may even switch to another chain. However, from a fundamental perspective, what truly determines the reliability of a system is whether a transaction is finally confirmed and immutable. That is the role of settlement. As blockchain architectures become more complex, a single-layer settlement approach is no longer sufficient. A new design paradigm has emerged: splitting settlement into multiple layers. This brings us to today’s topic: Multi-layer Settlement Starting from the Concept Multi-layer Settlement refers to a structure where the final confirmation of transactions is no longer completed by a single layer but is gradually finalized across multiple layers. In simple terms, settlement is no longer a one-time event—it becomes a staged process. This evolution is inevitable. Early blockchains used a single-layer structure where execution, validation, and settlement all occurred within the same system. While simple, this approach has limitations: it is difficult to achieve both high performance and high security simultaneously. Prioritizing speed may compromise security Prioritizing security may reduce speed The core goal of multi-layer settlement is to resolve this trade-off by assigning different responsibilities to different layers. The Essence of Multi-layer Settlement At its core, multi-layer settlement deconstructs the confirmation process: The first layer focuses on fast transaction processing and immediate feedback The second layer performs stricter validation to enhance security The third layer (if present) ensures finality and immutability From a deeper perspective, this design redefines what “confirmation” means. In a single-layer system, confirmation is binary—either confirmed or not. In a multi-layer system, confirmation becomes a process, not a moment. Transactions are not instantly finalized—they are gradually “recognized.” First-layer confirmation is closer to a temporary state, providing quick feedback (e.g., whether a transaction is accepted) Second-layer confirmation introduces stricter checks to ensure correctness Third-layer confirmation locks the result, making it irreversible This structure allows users to experience fast confirmation first, followed by secure final confirmation. Each confirmation serves a different purpose: First confirmation: usability Later confirmations: security From the user’s perspective, the process feels instant—but behind the scenes, validation continues across layers. This design essentially separates speed and security into different responsibilities. How Multi-layer Settlement Works In practice, multi-layer settlement relies on collaboration between different networks. For example: An execution layer processes transactions quickly and generates results These results are submitted to higher layers for validation The upper layers verify correctness and compliance Only after validation do transactions become final Settlement becomes a process of gradual convergence. Each layer contributes part of the process: Lower layers generate results Higher layers confirm results As layers progress upward, the reliability of confirmation increases. The Role of Data in Settlement A critical requirement is that data must be verifiable. Upper layers do not re-execute every transaction. Instead, they rely on proofs or structured data to validate correctness. If data is incomplete or unverifiable, the entire settlement process fails. Therefore, data design is an integral part of settlement design. Key Components in Multi-layer Settlement In real-world implementations, the system typically includes: Execution Layer → handles transaction processing Validation Layer → verifies or proves correctness Settlement Layer → finalizes transactions Data Layer → ensures data transmission across layers These components together form a complete settlement pipeline. Challenges: Synchronization Between Layers A practical challenge is synchronization between layers. Delays in data transmission can affect confirmation Inconsistent states across layers may cause errors To address this, systems must define: Data submission frequency Validation cycles Finalization conditions Clear responsibility separation is also critical: Overloading a layer reduces efficiency Poor division of roles may lead to redundant or missing validation Ultimately, multi-layer settlement is not just stacking layers—it is about clear division of labor: Execution → speed Validation → correctness Settlement → finality Quick Summary (1-Minute Takeaway) Multi-layer Settlement = multi-stage confirmation mechanism Speed happens in lower layers, security in higher layers It resolves the trade-off between performance and security through layering Conclusion Blockchain is evolving from monolithic architectures to layered systems, and Multi-layer Settlement is a key reflection of this shift. It does not change the essence of settlement—but it transforms how settlement works:
from a single confirmation to multiple confirmations.
