奧拉簡介

OLA是一種側重於交叉鏈互動的基礎架構，為比特幣生態系統提供了鏈間零知識證明。

OLA is an infrastructure focused on cross-chain trusted interactions, providing inter-chain zero-knowledge proofs for the Bitcoin ecosystem.

OLA是一種側重於交叉鏈互動的基礎架構，為比特幣生態系統提供了鏈間零知識證明。

Traditional BTC cross-chain bridges often rely on multi-signature custody or centralized intermediaries, which place additional trust assumptions on the safety of user funds, usually controlled by a single entity or a majority of entities. This model presents centralized risks and deviates from the decentralized spirit of Bitcoin. In contrast, OLA aims to minimize reliance on third parties for cross-chain bridges through cryptographic methods and decentralized mechanisms.

傳統的BTC跨鏈橋通常依靠多簽名的監護權或集中式中介機構，這些中介機構對用戶資金的安全性進行了額外的信任假設，通常由單個實體或大多數實體控制。該模型提出了集中的風險，並偏離了比特幣的分散精神。相反，OLA旨在通過加密方法和分散機制最大程度地減少對第三方對跨鏈橋的依賴。

With the gradual improvement of the BitVM2 protocol engineering practice, the Trust-minimized Bridge built on BitVM2 has become an important infrastructure for various Bitcoin projects. The construction of the Bitcoin Trust-minimized Bridge requires several core foundational modules:

隨著BITVM2協議工程實踐的逐步改進，基於BITVM2建立的信任最小的橋已成為各種比特幣項目的重要基礎設施。比特幣信任最小的橋的構建需要幾個核心基礎模塊：

• Block Header ZKP (Zero-Knowledge Proof) generation and management

•塊標頭ZKP（零知識證明）生成和管理

• Chain state synchronization and state proofs

•鏈狀態同步和狀態證明

• Supervised and decentralized verifiers for proofs

•有監督和分散的驗證者以獲取證明

• Efficient and lightweight proof aggregation and submission

•有效且輕巧的證明聚合和提交

OLA concentrates on building a full-chain Block Header ZKP generation and management platform, providing verifiable chain state proofs for different projects' Trust-minimized Bridges to ensure the credibility of state synchronization among multiple chains. Its goal is to establish an interaction channel with minimal trust assumptions between Bitcoin and other blockchains, realizing cross-chain bridging infrastructure without custodians. Through the chain state proofs provided by OLA, cross-chain bridges based on the BitVM2 protocol can verify state changes on the Bitcoin main chain and target chains without trusting any intermediary, executing cross-chain operations like Peg-In (anchoring deposits) and Peg-Out (redeeming withdrawals) safely. It's noteworthy that this design enables the cross-chain flow of Bitcoin assets to no longer depend on centralized custody or federated multi-signatures but relies on zero-knowledge proofs and decentralized verification networks for safety. OLA hopes to become the native cross-chain connection base for Bitcoin, extending its security to a multi-chain environment and lowering the trust cost in cross-chain interactions.

Ola專注於建立全鏈塊標頭ZKP生成和管理平台，為不同項目的信任最小的橋樑提供可驗證的鏈狀態證明，以確保多個鏈中的狀態同步的可信度。它的目標是建立一個比特幣和其他區塊鏈之間具有最小信任假設的互動渠道，實現了沒有託管人的跨鏈橋接基礎設施。通過OLA提供的鏈狀態證明，基於BITVM2協議的跨鏈橋可以驗證比特幣主鍊和目標鏈的狀態變化，而無需信任任何中介機構，執行peg-in（錨定存款）和釘子（固定）和釘子（贖回撤回）等跨鏈操作。值得注意的是，這種設計使比特幣資產的跨鏈流不再取決於集中的監護權或聯邦多簽名，而是依賴於零知識證明和分散的驗證網絡來安全。奧拉希望成為比特幣的本地跨鏈連接基礎，將其安全性擴展到多鏈環境，並降低跨鏈交互的信任成本。

OLA Technical Architecture and Module Description

OLA技術架構和模塊描述

The OLA system comprises several modules that work in coordination, each performing its role to achieve the generation, verification, and submission of inter-chain state proofs. The main architectural modules include:

OLA系統包括幾個在協調中起作用的模塊，每個模塊都扮演其作用，以實現鏈間狀態證明的生成，驗證和提交。主要建築模塊包括：

1) Block Header ZKP Generation Module: This module is responsible for periodically collecting Bitcoin block headers and generating zero-knowledge proofs (ZKPs) for them. The ZKPs attest to the state of the Bitcoin chain at specific heights without revealing the actual block header data. This ensures that the state snapshot is provably derived from the Bitcoin main chain.

1）塊標頭ZKP生成模塊：此模塊負責定期收集比特幣塊標頭並為其生成零知識證明（ZKP）。 ZKP在特定高度處證明了比特幣鏈的狀態，而無需揭示實際的塊標頭數據。這確保了狀態快照可證明是從比特幣主鏈中得出的。

2) Chain State Synchronization Module: Different blockchains have their own state transition models. This module tracks the state changes on the target chain and synchronizes them with the corresponding Bitcoin chain state at the same height through ZKPs. For instance, if a user deposits ETH into a cross-chain bridge to perform a Peg-In operation, this deposit will be reflected as a state change on the Ethereum chain, which the Chain State Synchronization Module detects and handles. At the same time, the module fetches Block Header ZKPs for the same height from the Bitcoin chain to attest to the Bitcoin state at that specific time period.

2）鏈狀態同步模塊：不同的區塊鏈具有自己的狀態過渡模型。該模塊跟踪目標鏈上的狀態變化，並將其與相同高度通過ZKP的相應比特幣鏈狀態同步。例如，如果用戶將ETH沉積到跨鏈橋上進行釘住操作，則該沉積物將反映為以太坊鏈上的狀態變化，鏈狀態同步模塊檢測和處理。同時，該模塊從比特幣鏈中獲取相同高度的塊標頭ZKP，並在該特定時間段內證明到比特幣狀態。

3) Proof Verifier Network: Multiple decentralized verifiers participate in verifying the validity of ZKPs and performing lightweight computations on state transitions. They ensure that the state proofs used for cross-chain operations are indeed generated by the ZKP Generation Module and have not been tampered with. This network serves as a final checkpoint for cross-chain state updates, preventing malicious actors from forging proofs to manipulate funds.

3）證明驗證者網絡：多個分散的驗證者參與驗證ZKP的有效性並對狀態轉換執行輕量級計算。他們確保用於跨鏈操作的狀態證明確實是由ZKP生成模塊生成的，並且沒有被篡改。該網絡是跨鏈狀態更新的最終檢查點，防止惡意演員偽造證明以操縱資金。

4) Proof Aggregation and Submission Module: As the number of verifiers increases, the computational and storage requirements for verifying ZKPs and performing state synchronization will become more demanding. This module aggregates proofs from different verifiers and submits them to the target chain in a batched and efficient manner. This reduces the computational burden on individual verifiers and optimizes the throughput of cross-chain operations.

4）證明聚合和提交模塊：隨著驗證者的數量增加，驗證ZKP和執行狀態同步的計算和存儲要求將變得更加要求。該模塊從不同的驗證者匯總了證明，並以批處理和有效的方式將其提交到目標鏈中。這減輕了單個驗證者的計算負擔，並優化了跨鏈操作的吞吐量。

5) Supervisor Network and Challenger Network: To minimize the risk of a single party acting dishonestly, there are two additional networks: the Supervisor Network monitors the overall operation of the cross-chain bridge and detects any anomalies or potential issues. The Challenger Network can actively challenge any suspicious behavior and provide evidence to the supervisor network for making final decisions. Together, they form a decentralized supervision and dispute resolution mechanism to ensure the honest execution of cross-chain transactions.

5）主管網絡和挑戰者網絡：為了最大程度地降低單一政黨不誠實的風險，還有兩個其他網絡：主管網絡監視跨鏈橋的整體操作，並檢測到任何異常或潛在問題。挑戰者網絡可以積極挑戰任何可疑行為，並向主管網絡提供最終決定的證據。他們共同形成了分散的監督和爭議解決機制，以確保誠實執行跨鏈交易。

The above modules work together to achieve a cross-chain bridge infrastructure that is minimally trusted and capable of verifying states across multiple blockchains. OLA extends Bitcoin's security model to inter-chain interactions: funds are hosted by smart contracts and BitVM2 scripts, combined with the supervision of multiple verifiers, allowing the cross-chain bridge to operate securely with minimal trust assumptions (such as 1-of-N participants being honest).

上述模塊共同起作用，以實現跨鏈橋接基礎架構，該基礎架構是最信任的，能夠驗證多個區塊鏈的狀態。 OLA將比特幣的安全模型擴展到鏈間交互：資金由智能合約和BITVM2腳本託管，並結合了多個驗證符的監督，從而使跨鏈橋可通過最小的信任假設（例如1-N參與者誠實）安全地操作。

Overview of OLA Technical Process

OLA技術過程的概述

To ensure the credible synchronization of multi-chain states, OLA has built a

為了確保多鏈國家的可靠同步，Ola建立了一個