Table of Contents:
I. Introduction to OKChain 2
1.1 Overview of OKChain 2
1.2 Cosmos Architecture 2
1.2.1 Tendermint 3
1.2.2 Cross-Chain Mechanism 3
1.3 OKChain Token Overview 5
1.3.1 OKT Issuance Mechanism 5
1.3.2 OKT Functions 5
II. OKChain Operational Process and Ecosystem Roles 6
2.1 Block Production Process 6
2.2 Voting Design 7
2.2.1 Voting Weight 7
2.2.2 Delegators 8
2.3 OKChain Node Requirements 8
2.3.1 Token Staking Requirement 9
2.3.2 Hardware Requirements 9
2.3.3 Software Requirements 11
2.4 Node Reward and Penalty Rules 11
2.4.1 Node Rewards and Distribution Rules 11
2.4.2 Node Penalty Rules 11
2.5 On-Chain Governance 12
III. OKChain–OpenDEX 13
3.1 Centralized Exchanges (CEX) vs. Decentralized Exchanges (DEX) 13
3.1.1 Centralized Exchanges 13
3.1.2 Decentralized Exchanges 14
3.1.3 Complementary Relationship Between OKChain and OKEx 15
3.2 OpenDEX 15
3.2.1 On-Chain Order Book Model 16
3.2.2 Call Auction Matching Model 16
3.2.3 Advantages of OpenDEX 16
IV. Conclusion 18
I. Introduction to OKChain
1.1 Overview of OKChain
OKChain is an open-source public blockchain developed by OKEx, designed to provide secure and efficient DeFi infrastructure. Its goal is to foster a community-operated decentralized exchange (DEX) with transparent trading rules and user-controlled assets.
Cross-chain technology is a critical enabler for interoperability of assets and data across the blockchain ecosystem, serving as the technical foundation for DeFi. It allows for the transfer of assets, exchange of information, and coordination of applications between different blockchain platforms. Acting as a bridge between disparate public chains, cross-chain technology facilitates data transmission while significantly reducing costs. Through cross-chain modules, it enables seamless value, user, and application interconnection, helping to build integrated ecosystems and value networks.
To this end, OKChain is built on Cosmos's Tendermint consensus mechanism and the Cosmos SDK. Cosmos introduced the Inter-Blockchain Communication (IBC) protocol—a standard for cross-chain interoperability—and leverages Tendermint's instant finality to enable value transfer between blockchains. In the future, IBC will also support heterogeneous cross-chain interactions to address the challenges of multi-directional value flow.
1.2 Cosmos Architecture
Cosmos is a network of many independent, parallel blockchains connected through nodes. These blockchains use Tendermint, a high-performance Byzantine Fault Tolerant (BFT) consensus engine, as their consensus layer, offering both high performance and strong consistency. The Cosmos network primarily consists of two components: the Hub (a central blockchain) and multiple Zones (independent blockchains). Each Zone and the Hub are separate blockchains with their own state and consensus. A Zone is a blockchain tailored for specific applications, while the Hub focuses on processing cross-zone transactions. Functioning like a central bank's settlement system, the Hub uses the IBC protocol to enable interoperability and composability among different Zones, completing cross-chain value transfers.
(Cosmos architecture diagram; image source: Internet)
Cosmos presents a blockchain blueprint that simplifies development and ensures seamless interoperability. Simplified development is achieved through the Tendermint consensus algorithm, while seamless interoperability relies on its cross-chain mechanism.
1.2.1 Tendermint
Tendermint consists of two core technical components: Tendermint Core, a blockchain consensus engine, and the Application Blockchain Interface (ABCI), a generic API. Tendermint Core handles peer-to-peer data transmission and Byzantine consensus using a hybrid BFT-DPoS algorithm. This ensures transaction finality (meaning once a transaction is written into a block and added to the chain, it cannot be reversed or altered), guarantees all nodes record transactions in the same order, and delivers ultra-fast confirmation with high throughput. In essence, Tendermint Core manages a blockchain's network and consensus layers, allowing developers to build custom blockchains without implementing consensus or networking logic from scratch.
The ABCI is both a blockchain application interface and a protocol that supports transaction processing in any programming language. When developing a blockchain on the Cosmos framework, developers only need to write an application that complies with the ABCI specification.
To further simplify blockchain development, Cosmos provides the Cosmos SDK on top of Tendermint Core and ABCI. The SDK standardizes common blockchain modules. Often called Cosmos's "blockchain factory," the Cosmos SDK allows developers to design custom blockchains using a modular approach—for instance, by adding governance, staking, and other modules. Blockchains created with this protocol are natively interoperable, making project development remarkably straightforward.
1.2.2 Cross-Chain Mechanism
Cross-chain mechanisms can be categorized based on the compatibility of their underlying platforms: homogeneous-chain and heterogeneous-chain cross-chain. Homogeneous cross-chain refers to interactions between blockchains with identical underlying structures (such as cryptographic algorithms, address formats, and account derivation rules), like transferring Ethereum-based tokens. While homogeneous cross-chain solutions are mature in many projects, they cannot interact with major mainstream assets like BTC, ETH, and USDT.
Heterogeneous cross-chain, in contrast, enables value locking and exchange between blockchains with different architectures, solving the challenge of multi-directional value circulation. Cosmos adopts a multi-chain, multi-layer architecture anchored by a relay chain to support cross-chain asset interoperability.
To enable cross-chain interoperability among parallel chains, Cosmos introduced the Inter-Blockchain Communication (IBC) protocol. By leveraging Tendermint's instant finality, it facilitates value and data transmission across multiple heterogeneous chains. All parallel chains connect to the Hub via IBC, where the Hub acts as the relay chain, assisting in the verification and transfer of cross-chain transactions.
Here's how it works: The Hub helps each Zone synchronize and record the state of every other Zone by storing their block headers. When Zone1 sends a cross-chain message to Zone2, it includes all relevant information in its block header. After Zone1 reaches consensus on the block containing this information, the Hub incorporates Zone1's block header into a new block. Once the Hub reaches consensus on this new block, Zone2 receives the Hub's broadcasted verification data—including Zone1's block header. Zone2 must then verify the proof about Zone1; if valid, it executes the corresponding operation and sends the resulting block information back to the Hub.
(IBC cross-chain message passing; image source: OKEx Research)
Let's illustrate IBC-based cross-chain interaction with an example: transferring 10 OKT from OKChain to Cosmos.
For OKChain to conduct a cross-chain transaction with Cosmos, both must run lightweight node services for each other's blockchain. This allows them to receive each other's block headers in real time, enabling subsequent SPV-like (Simple Payment Verification) validation. An SPV node verifies a transaction's existence by requesting a Merkle path proof and validating the Proof-of-Work in the blockchain.
OKChain initializes the IBC protocol on-chain, freezes the corresponding asset (10 OKT), and generates and sends the relevant proof to the Cosmos Hub blockchain.
The Cosmos Hub receives the IBC message and uses OKChain's block header information to confirm that the specified assets have been frozen. Cosmos then mints an equivalent amount (10 OKT) of assets on its own chain.
This completes the transfer of 10 OKT from OKChain to Cosmos.
1.3 OKChain Token Overview
OKChain launched its mainnet with the native utility token OKT. The entire genesis supply was distributed proportionally to OKB holders based on their OKB balances. OKT serves as the value carrier of the OKChain ecosystem, with its value underpinned by the growth and adoption of applications built on OKChain, including DEXs and DeFi protocols.
1.3.1 OKT Issuance Mechanism
OKT follows a genesis supply plus annual inflation model. The genesis supply is 300 million OKT, with a fixed annual inflation rate of 1% distributed evenly across all blocks.
1.3.2 OKT Functions
1) System Resource Usage
Deploying an application on the OKChain network consumes computational, storage, and bandwidth resources. OKChain adopts an Ethereum-style resource pricing model: transactions require fees to be processed. Specifically, transaction fee = ceil(Gas × Gas Price), where Gas Price is the amount of OKT a user is willing to pay per unit of Gas.
2) Staking
Nodes must stake a minimum amount of OKT to apply as validators or delegators, which helps deter malicious behavior. Users must also stake OKT when submitting governance proposals to prevent spam or malicious submissions. Similarly, staking OKT is required when placing orders on the exchange.
3) Business Fees
Users holding a certain amount of OKT can issue new tokens on the OKChain network. After submitting and activating a digital asset trading pair proposal, newly issued tokens become freely tradable on OpenDEX. Token issuance, trading pair activation, minting, and burning all incur corresponding business fees.
(Business fee schedule [data from testnet; subject to adjustment on mainnet]; image source: OKEx Research)
4) Matching Fee (Liquidity Bond)
OpenDEX continuously receives orders, but block capacity is finite. If transaction volume exceeds block capacity during a given period, the system cannot distinguish between low-value and high-value trading pairs. How should OpenDEX prioritize which trades to include? It implements a matching fee (liquidity bond) mechanism: operators can post any amount (including zero) of OKT as collateral for their trading pairs. During matching, the system prioritizes trading pairs with higher collateral; if collateral amounts are equal, earlier-placed orders are matched first. This dynamic auction-based approach solves the prioritization problem while expanding OKT's utility. It also serves as a quantifiable metric of a DEX operator's strength. For example, suppose each block can process 100 transactions, but 200 are submitted—100 for trading pair A and 100 for pair B. This leaves 100 transactions unprocessed. If the operator posts higher collateral for pair A than for pair B, the system prioritizes matching all 100 transactions on pair A. If collateral amounts are equal, the system matches the 100 earlier-placed orders first.
5) Voting
Voting is the primary method for token holders to elect validators and participate in on-chain governance. Token holders obtain voting power by staking OKT: 1 OKT = 1 vote, and each vote can be split across up to 30 candidate validators. Validator selection for block production is determined by voting weight, and validator decisions on governance proposals are also made through voting.
II. OKChain Operational Process and Ecosystem Roles
2.1 Block Production Process
OKChain employs the Tendermint (BFT-DPoS) consensus algorithm. Block creation involves six fundamental steps: running a full node → registering as a candidate validator → voting to elect validators (miners) → selecting a proposer → proposing a block → Tendermint consensus voting to finalize a new block.
(OKChain block creation flow; image source: OKEx Research)
Before becoming a block proposer, token holders must run a node client to become a full node within the decentralized network. To register as a candidate validator eligible for voting, full nodes must stake tokens. The top 21 nodes ranked by OKT voting weight become validators (miners) for the next epoch. The system then calculates each validator's voting weight based on received votes and selects the block proposer using a randomized algorithm weighted by voting power. The proposer produces blocks according to the Tendermint consensus protocol.
In Tendermint consensus, successful block production requires two voting phases: "pre-vote" and "pre-commit." After selection, the proposer listens for and collects network transactions, packages them into a new block within a time window, and broadcasts it as the "proposal block." Upon receiving this block, all validators read and validate the included transactions. If no issues are found, they emit a pre-vote message. These messages are broadcast to all validators; the process only advances to the pre-commit phase after ≥2/3 of validators agree. Once ≥2/3 of validators issue pre-commit votes, the proposal block is deemed accepted by the majority and is written to each validator's local blockchain, completing block production with finality.
(Tendermint consensus process; image source: OKEx Research)
After a block is completed, the system proceeds to the next round and begins proposing a new block.
Network latency, proposer downtime, or other failures may prevent the current proposer from submitting a block. In such cases, the protocol selects the next validator in sequence to propose a new block at the same height and restart voting. Furthermore, Tendermint introduces a locking mechanism: once a validator pre-commits to a block, it becomes "locked" onto that block and must pre-vote for it in subsequent rounds. If pre-proposal and pre-vote fail to finalize a block in a prior round, the validator is unlocked and proceeds to pre-commit the new block. Provided fewer than one-third of validators are Byzantine, Tendermint guarantees validators will never double-sign conflicting blocks at the same height.
2.2 Voting Design
Voting is the primary mechanism for token holders to elect validators and participate in on-chain governance. Validators are elected via votes cast by token holders or delegators, with each voter able to support up to 30 candidate validators simultaneously. Candidates are ranked by voting weight, and the top 21 become validators. The remaining candidates serve as standby validators. Validator elections occur periodically, with new validators re-elected by token holders each cycle.
During on-chain governance, if a token holder or delegator abstains from voting, their chosen validator inherits their voting rights. These 21 validators vote on proposals; however, if token holders or delegators disagree with their validator's vote, they can override it by casting their own vote directly.
2.2.1 Voting Weight
(Weight coefficient and voting weight formula; image source: OKChain GitHub)
Weight is the voting weight coefficient, which increases over time—the longer the elapsed time since the start timestamp, the larger the coefficient.
now_timestamp is the current voting timestamp.
start_timestamp is the start timestamp, set to 946684800 (00:00:00 UTC on January 1, 2000).
seconds_per_day is seconds per day = 60 × 60 × 24.
weeks_per_year is weeks per year = 52.
Shares is the voting weight.
delegated_Tokens is the amount of staked OKT.
The voting weight coefficient equals the difference between the current voting timestamp and the 2000 start timestamp, divided by the number of seconds in 364 days. Thus, the farther the voting time is from the start time, the larger the coefficient. Voting weight equals the staked amount multiplied by 2 raised to the power of the voting weight coefficient. Therefore, larger stakes and more recent voting times yield higher voting weights—encouraging users to increase their stake and participate actively in voting.
2.2.2 Delegators
A validator's voting weight is determined by OKT holders who stake and vote. OKT holders can vote directly or delegate their voting rights to a delegator who votes on their behalf. To register as a delegator, users must deposit a minimum amount of OKT into a staking account before representing other accounts in validator elections. When a delegator chooses to withdraw delegated tokens, they must wait 14 days after initiating the withdrawal request before claiming the tokens.
Regarding fund security, users retain full control of their private keys—the delegator only gains voting rights over the staked tokens. Token delegation is an on-chain action; ownership remains in the user's personal wallet address. When users adjust the amount of OKT delegated to a delegator, the delegator's total voting weight updates automatically.
Validators receive system rewards and must share a portion with their delegators. Conversely, validator penalties also impact delegator earnings. Therefore, delegators should thoroughly research and vet validators before voting—using tools like OKLink or other OKChain block explorers to review validator uptime, double-signing history, security status, and governance participation. After voting, delegators must continuously monitor validator performance to ensure correct behavior. Upon detecting warning signs—such as poor uptime, double-signing, or compromised security—delegators can immediately unbond or redirect their votes to another validator.
2.3 OKChain Node Requirements
OKChain relies on a set of validators to maintain network security. Validators operate full nodes and participate in consensus by broadcasting votes. Becoming a validator requires meeting system requirements—not only a minimum token stake but also specific hardware and software specifications.
(Validator responsibilities; image source: OKEx Research)
2.3.1 Token Staking Requirement
A prerequisite for validator election is successfully connecting to the OKChain network and staking 100,000 OKT.
2.3.2 Hardware Requirements
Typical node hardware configurations are as follows:
(Hardware configuration requirements; image source: OKEx Research)
OKChain Minimum System Requirements:
(OKChain minimum system requirements; image source: OKChain GitHub)
As observed, initial node hardware requirements are modest, but they increase as network usage grows. Compared to chains like Ethereum or Bitcoin, OKChain offers high throughput, requiring slightly higher bandwidth to ensure stable inter-node communication. Storage capacity must scale dynamically: as block data accumulates, block-producing nodes must store complete blockchain data—requiring timely disk expansion when capacity nears exhaustion.
Currently, server configurations offer two primary options:
Self-hosted servers involve purchasing physical hardware, setting up power and networking infrastructure, and running services yourself. The upfront costs are significant, covering hardware, facility expenses, and operational personnel. They also demand a 24/7 environment with uninterrupted power and internet, which imposes strict requirements. The key advantage, however, is direct, hands-on control for specific service adjustments.
Cloud servers offer a ready-made alternative, where you purchase virtual servers with dynamically configurable parameters to run your services. They provide greater flexibility and lower costs. Today, most nodes run on cloud platforms like Amazon Web Services (AWS), Google Cloud Platform, and Alibaba Cloud. Once you secure this infrastructure, launching a node is often as simple as following the official setup guide. However, this practice has long been criticized within decentralized communities, as it means nodes for decentralized networks are still hosted on infrastructure controlled by a handful of global tech giants.
For OKChain validator nodes, data center locations should feature redundant power supplies, network connectivity, and storage backups. We recommend deploying redundant networking gear—such as fiber optics, firewalls, and switches—followed by compact servers with redundant hard drives and failover capabilities. This hardware can be installed in the bottom tier of standard data center equipment racks.
2.3.3 Software Requirements
When running an OKChain node, it's wise to implement monitoring, alerting, and management solutions. This allows for an effective response to attacks or service disruptions, helping maintain data center security and isolation. Proper monitoring also helps prevent accidental unbonding or unintentional violations of the system's penalty rules.
2.4 Node Reward and Penalty Rules
2.4.1 Node Reward and Distribution Rules
Economic incentives for block-producing nodes are a cornerstone of any blockchain project. In Bitcoin, miner rewards come from block subsidies and transaction fees. For OKChain, the OKT tokens from the genesis block were airdropped 1:1 to OKB holders—so where do the miner rewards originate?
Rewards come from two sources. First, the system issues a 1% annual inflation, distributed proportionally with each new block. From this inflationary supply, 25% serves as the block reward, allocated to the top 21 validators by voting weight. The remaining 75% constitutes the vote-weight reward, distributed among all candidate validators based on their share of votes. This structure ensures that even candidates not selected for block production are incentivized to participate as standby validators, mitigating the risk of inactive block producers.
The second reward source is transaction fees, allocated exclusively to the 21 active validators based on voting weight. These fees include system fees (i.e., gas) and business fees, such as those for token pair issuance, digital asset trading pair activation, and token inflation.
(Source and distribution of node revenue; image courtesy of OKEx Research)
2.4.2 Node Penalty Rules
Tokens staked by nodes act as a performance bond for their validation duties. A node can lose its block-producing status if it deliberately abstains, becomes passively inactive due to an attack, operates improperly, or engages in malicious behavior.
Specific penalties include:
Failing to participate in block validation signing results in a 10-minute suspension, during which the node cannot produce blocks.
Double-signing—signing blocks at the same height on two different chains—leads to the permanent revocation of block-producing rights.
2.5 On-chain Governance
Beyond producing blocks, validator nodes must also participate in on-chain governance. While block production ensures the chain continues, governance determines the critical system parameters that shape the network's future, making validators pivotal stakeholders.
OKChain's on-chain governance primarily covers four areas: soliciting community feedback on specific topics, modifying system parameters, delisting trading pairs on the DEX, and facilitating network-wide upgrades. To deter frivolous proposals that waste community effort, all governance proposals require a minimum deposit of 100 OKT. A proposal's voting weight is proportional to this deposit. Once the deposit threshold is met, a proposal enters a two-week voting period. It passes if "Yes" votes (excluding abstentions) exceed 50% and "No" votes (excluding abstentions) remain below 33.33%.
(Proposal workflow diagram)
III. OKChain-OpenDEX
OpenDEX is an open, decentralized exchange built on the OKChain ecosystem. To understand it, we must first examine the characteristics, advantages, and limitations of both centralized exchanges (CEXs) and decentralized exchanges (DEXs).
3.1 Centralized Exchanges vs. Decentralized Exchanges
3.1.1 Centralized Exchanges
An exchange's core function is to facilitate trades. CEXs excel in liquidity and ease of fiat on-ramps and off-ramps. Their major drawback, however, is that users must entrust their tokens to the exchange—a significant risk. As the adage goes: "Not your keys, not your coins."
Pain points of centralized exchanges:
Data Leakage Risk
Before trading on a CEX, users must submit extensive personal information—an often cumbersome process. Transaction data stored on the exchange's servers remains under its control. This centralized management and information opacity expose users to data breach risks.
Current internet identity systems are flawed: user data is fragmented across different service providers without unified management. Users repeatedly register usernames and passwords across platforms. Reusing passwords across multiple sites creates serious security vulnerabilities.
Fund Misappropriation Risk
User tokens reside entirely within the centralized exchange, managed solely by the platform. This setup leaves open the possibility of fund misuse or unauthorized modification of user records.
Fund Theft Risk
All exchanges face security challenges, but the larger the funds, the greater the incentive for hackers and the broader the attack surface. If a CEX's wallet is compromised, the tokens within are often irretrievably lost. Over the past decade, more than 30 major CEX hacks have occurred, including Mt. Gox and Coincheck. Such incidents continue today, with hackers constantly probing for vulnerabilities in centralized systems.
Network Downtime Risk
Network downtime refers to service interruptions caused by server crashes, shutdowns, or maintenance.
This disrupts normal trading, frequently leading to poor user experiences and financial losses for both users and the exchange.
Trading Pair Listing Requires Approval
CEXs require manual review to list new trading pairs, limiting available options. Users seeking diverse tokens often need accounts across multiple exchanges, further fragmenting their identity data. Beyond BTC and ETH, most tokens typically support only one or two high-market-cap trading pairs. Even when two desired tokens exist on the same CEX, a direct trading pair between them may not be available, complicating the trading process.
3.1.2 Decentralized Exchanges
In DEXs, funds reside either in users' personal wallets or within trading smart contracts—remaining under user control. Trades execute via smart contracts, with asset transfers occurring directly on-chain. All transaction records are publicly verifiable. However, due to scalability constraints of underlying blockchains, many users sacrifice the ideal of full private-key control for the superior liquidity offered by CEXs.
1) Advantages of DEXs:
Enhanced Fund Security
DEXs employ simple matching mechanisms without taking custody of user assets. Funds stay in user wallets or smart contracts, fully controlled by the user and inaccessible to third parties. This eliminates risks associated with exchange hacks or misconduct, relying instead on code-enforced security.
Privacy/Anonymity
Using a DEX typically requires only a public key. Some DEX developers claim to publish only open-source software, disclaiming responsibility for how communities use it, thereby sidestepping KYC and AML compliance burdens.
No Downtime
As DEXs operate on distributed public blockchains using decentralized consensus, a single point of failure does not impair overall functionality. This exponentially enhances security and eliminates downtime risks.
2) Pain points of DEXs:
Public Chain Security Risks
DEXs depend entirely on the security of their underlying blockchain. If the chain's integrity is compromised, DEX transaction data becomes untrustworthy, and user asset safety is illusory.
Liquidity Shortages
Liquidity is critical for smooth trading. Many DEXs suffer from poor liquidity, resulting in high slippage—the difference between the intended order price and the final execution price. Prominent DEXs like EtherDelta and 0x, built on Ethereum, face constraints like limited user bases and shallow order books, hindering growth.
3.1.3 OKChain and OKEx: Complementary Ecosystems
We see that CEXs and DEXs involve distinct trade-offs, catering to different user segments.
At its core, an exchange facilitates trading. CEXs deliver a superior user experience, leading most users to prefer them for their better liquidity and seamless fiat integration. Established exchanges' robust capital reserves and proven crisis response further bolster user trust. Conversely, another segment of users prioritizes fund security and anonymity over convenience, making DEXs their preferred choice.
OKChain addresses this niche demand for decentralization, complementing OKEx's service to mainstream users. Their synergy leverages different technical approaches to maximize coverage across diverse user groups, enhancing the overall ecosystem experience.
3.2 OpenDEX
OpenDEX is a DeFi project within the OKChain ecosystem, providing secure and stable digital asset trading services. OKChain's mainnet architecture offers the foundational infrastructure for decentralized exchanges. Functionally, OpenDEX acts as middleware, enabling anyone to launch a DEX—similar to how Ethereum's smart contracts simplified token issuance. OKChain provides the essential primitives, empowering individuals to create their own exchanges.
Unlike many traditional DEXs, OpenDEX places both the matching engine and the order book fully on-chain. This complete on-chain management enhances transparency and security. Its matching system uses a call auction model, minimizing the impact of transaction ordering within a block on final outcomes, thereby ensuring fairness. Compared to Ethereum-based projects, OKChain's call auction matching achieves faster execution times.
3.2.1 On-chain Order Book Model
OpenDEX adopts a fully on-chain order book architecture. Every order and state change is recorded as a transaction on the blockchain. All unfilled orders reside in this on-chain book, with execution determined by bid/ask placements and pre-defined matching strategies. Cross-asset trades execute directly through order placement.
In OpenDEX's design, deposits, withdrawals, order placement, and settlement are all handled by smart contracts. The basic workflow: a maker (order placer) signs an order with their private key and submits it to the chain. Makers can optionally set orders to auto-cancel after a specified number of blocks. A taker (order fulfiller) then selects an order from the book, generates the corresponding transaction, signs it, and submits it to the on-chain smart contract. The contract validates the signatures and order validity before executing the settlement.
3.2.2 Call Auction Matching Model
OpenDEX's matching system implements a call auction. Since blockchain orders appear discretely at block intervals rather than continuously, DEXs use periodic call auctions instead of the continuous double-auction algorithms common in CEXs. Each block runs a call auction, ensuring a single execution price per trading pair per block. Execution follows "price priority, then time priority," significantly reducing the impact of intra-block ordering and guaranteeing fairness.
3.2.3 Advantages of OpenDEX
1) Fund Security
Based on custody, DEXs fall into custodial and self-custodial categories. Custodial DEXs transfer funds to externally controlled contracts. To mitigate risk, some Layer-2 custodial DEXs use multi-signature schemes. Self-custodial Layer-2 DEXs ensure: (i) no fund transfers without explicit user signatures; (ii) users receive full transaction context when signing; (iii) funds remain instantly withdrawable; and (iv) even malicious code upgrades cannot bypass these safeguards. Users retain ultimate control—operators cannot freeze or access assets. OpenDEX adopts this self-custodial model, enhancing token security.
2) Public Chain Security
OKChain uses the Tendermint consensus algorithm, which provides instant finality for newly produced blocks. Unlike Bitcoin's probabilistic finality, where tampering risk decreases but never reaches zero, Tendermint's deterministic finality means transactions are irrevocably settled immediately upon block confirmation. OpenDEX leverages this for high throughput and instant confirmation, preventing double-spending and securing funds for cross-chain clearing and settlement.
3) Unlimited Trading Pairs
To solve the constrained trading pair availability on CEXs, OpenDEX introduces DEX operators—entities authorized to issue tokens and create trading pairs. Unlike traditional DEXs where the exchange centrally manages pairs, OpenDEX is an open, convergent platform where operators manage pairs. To become an operator on OKChain, one must stake OKT: pay to issue a token and list its pair, submit a proposal to activate the pair, and then trade can begin. While operators can create unlimited pairs, system-enforced uniqueness prevents duplicates, requiring competitive bidding for popular pair operatorships.
4) Liquidity Support
In order-book exchanges, market makers provide liquidity. Traditional DEXs often overemphasize platform features while neglecting these key liquidity providers. By introducing DEX operators with proper incentives, OKChain aims to resolve the chronic liquidity shortages seen in many CEXs and DEXs.
5) Fee Reductions
DEX users incur gas fees (to validators) and trading fees (a flat 0.1% to DEX operators). To attract users and grow the ecosystem, future mechanisms will enable fee reductions. This includes DEX operators waiving matching fees for specific pairs and super-nodes approving gas fee waivers for select pairs via governance proposals.
Compared to mainstream CEXs, OpenDEX gives users full fund control, eliminating security risks stemming from centralization. It also offers superior privacy, transparency, and censorship resistance. Distributed node accounting ensures resilience against single-point failures, and users enjoy unrestricted trading pair selection.
Compared to other DEXs, OpenDEX builds on OKChain's cross-chain ecosystem, allowing swaps between any two listed crypto assets. Leveraging Tendermint's instant finality, it delivers high throughput and near-instant confirmation. Its DEX operator model with built-in incentives addresses traditional liquidity gaps. Future fee reductions will provide tangible benefits to users.
In summary, OpenDEX—built on the OKChain ecosystem—effectively addresses major pain points of both CEXs and existing DEXs.
IV. Conclusion
OKChain is an open-source public blockchain application platform developed by OKEx, aiming to build secure and efficient DeFi infrastructure. Its goal is to create a community-governed, transparent decentralized exchange (DEX) where users retain full asset control. Built on Cosmos's Tendermint consensus and Cosmos SDK, OKChain leverages the Inter-Blockchain Communication (IBC) protocol and Tendermint's instant finality to enable cross-chain value transfer. Future developments will support heterogeneous cross-chain interoperability. The OpenDEX project on OKChain tackles CEX pain points like data leakage, fund misappropriation, theft, downtime, and limited trading pairs. Furthermore, by introducing DEX operators, it addresses the liquidity shortage plaguing other DEXs.
Author: Xiuxiu
Mentors: ElbertXU, OceanFAN, JayMeng
References
1. OKChain GitHub
https://okchain-docs.readthedocs.io/en/latest/OKChain/overview.html
2. Tendermint Introduction and Practical Analysis
https://www.jianshu.com/p/c82a020f90fb
3. OKEx Research Report: Staking Economy – A New Mining Ecosystem Based on PoS Consensus
https://xueqiu.com/7023230380/151537031
4. Analysis and Reflections on Cross-chain Technology
https://blog.csdn.net/xilibi2003/article/details/88809051
In-depth Analysis of Tendermint: Rapid Integration into the Cosmos Ecosystem