(Image source: zk.link)

ZkLink ecosystem connects various L1 chains and L2 networks that enables developers and traders to leverage unified liquidity from isolated chains with a secure and seamless user experience, contributing to a more accessible and efficient DeFi ecosystem for everyone.

Zero-knowledge validity proofs are mathematically certified to guarantee only valid transactions are executed and cannot be manipulated or falsified, and hence ensure security of funds.

In virtue of ZK-Rollup's on-chain data availability, account states can always be rolled back in case of attacks, even when all the data on zkLink Layer2 Engine is lost. Zero knowledge guarantees that nobody, including the platform itself, can upload fake zk_proof to the main chain.

A light oracle network independently ensures the consistency of multi-chain states. Such separation of powers in the verification and judgment process ensures no single party controls asset security or is capable of malicious behavior.

The checks and balances design guards zkLink protocol against economic attack from both external hackers and internal stakeholders by assuring that no single branch has too much power.

dApps built on zkLink’s L2 network leverage seamless multi-chain liquidity, with rapid deployment solutions for decentralized and non-custodial order book, AMM, derivatives, and NFT exchanges.

A unified currency for all purposes on the zkLink L2 ecosystem.
No need of multiple wallets for separate chains.
Minimum friction and finality time.

zkLink is a trading-focus L2 ecosystem that solves liquidity problems, and provides a growing number of chain-agnostic L2 liquidity solutions for dApps developers with various use cases and easy-to-deploy APIs. On the zkLink L2 ecosystem, there will be no boundary between separate chains and segmented local liquidity is aggregated.

(Image source: zk.link)

• atomic swap for order book trades (spot trading and margin trading)

• constant product curve and stableswap curve for multi-chain AMMs NFT

• mint/trade for multi-chain NFT marketplace.

zkLink supports atomic swap for order book traders (both spot trading and margin trading). With the unified massive liquidity on the zkLink L2 network, we achieve limit orders and stop loss functions in a decentralized way for DeFi traders.

Simple CEX-like user experience

Partial fulfillment and multiple pending orders are supported; Up to 32 maker orders;

Secure and efficient

High performance centralized buy/sell matching, but with decentralized finality; Non-custodial assets, secured by ZK-Rollup L2 wallet;

Easy to deploy for MM

Use existing market making strategy, only an extra sig service is needed.

Permissionlessly create multi-chain LPs that consist of native tokens from separate chains, and of any type, such as ETH-SOL, UNI-CAKE, USD-XXX and more. Multiple trading curves are supported: constant product curve (UNI V2), optimized stableswap curve (Curve.fi), and concentrated liquidity model (UNI V3) - in development.

A Seamless and Easy-to-Use Trading Experience

• With negligible slippage on stablecoins.

• No need to install multiple wallets from each chain.

Real-time settlement based on zk validity proofs

When traders perceive the "direct" cross-chain liquidity pairs composed of tokens from two separate chains, there is no actual "cross-chain" events happened. As illustrated below, traders only interact with Layer1 smart contracts deployed on both source and target chains, to be more evocative, with a "vault" on each chain containing a single kind of token - where liquidity providers "put" their money.

(Image source: zk.link)

Step 3 in the figure is elaborated in Multi-chain ZK-Rollup and Multi-chain AMM. In step 2, a Layer1_Watcher on zkLink Layer2 network is constantly monitoring Layer1 smart contract logs, and synchronizes parameters of each transaction to Layer2 engine for computation. Similarly in step 4, a Layer1_Sender passes the verified outcome to Layer1 contract on the according chain, which then transfers the wanted tokens to the trader. This is how zkLink Layer2 contract receives and send information from / to different Layer1 smart contracts.

• Supports NFT minting, multi-chain trading, and mapping from any L1 to zkLink L2.

• Massive NFT assets from multiple L1 and L2 ecosystems for any audience.

• A unified pricing numeraire for NFTs from different blockchains.

(Image source: zk.link)

ZkLink ecosystem connects various L1 chains and L2 networks that enables developers and traders to leverage unified liquidity from isolated chains with a secure and seamless user experience, contributing to a more accessible and efficient DeFi ecosystem for everyone.

Zero-knowledge validity proofs are mathematically certified to guarantee only valid transactions are executed and cannot be manipulated or falsified, and hence ensure security of funds.

In virtue of ZK-Rollup's on-chain data availability, account states can always be rolled back in case of attacks, even when all the data on zkLink Layer2 Engine is lost. Zero knowledge guarantees that nobody, including the platform itself, can upload fake zk_proof to the main chain.

A light oracle network independently ensures the consistency of multi-chain states. Such separation of powers in the verification and judgment process ensures no single party controls asset security or is capable of malicious behavior.

The checks and balances design guards zkLink protocol against economic attack from both external hackers and internal stakeholders by assuring that no single branch has too much power.

dApps built on zkLink’s L2 network leverage seamless multi-chain liquidity, with rapid deployment solutions for decentralized and non-custodial order book, AMM, derivatives, and NFT exchanges.

A unified currency for all purposes on the zkLink L2 ecosystem.
No need of multiple wallets for separate chains.
Minimum friction and finality time.

zkLink is a trading-focus L2 ecosystem that solves liquidity problems, and provides a growing number of chain-agnostic L2 liquidity solutions for dApps developers with various use cases and easy-to-deploy APIs. On the zkLink L2 ecosystem, there will be no boundary between separate chains and segmented local liquidity is aggregated.

(Image source: zk.link)

• atomic swap for order book trades (spot trading and margin trading)

• constant product curve and stableswap curve for multi-chain AMMs NFT

• mint/trade for multi-chain NFT marketplace.

zkLink supports atomic swap for order book traders (both spot trading and margin trading). With the unified massive liquidity on the zkLink L2 network, we achieve limit orders and stop loss functions in a decentralized way for DeFi traders.

Simple CEX-like user experience

Partial fulfillment and multiple pending orders are supported; Up to 32 maker orders;

Secure and efficient

High performance centralized buy/sell matching, but with decentralized finality; Non-custodial assets, secured by ZK-Rollup L2 wallet;

Easy to deploy for MM

Use existing market making strategy, only an extra sig service is needed.

Permissionlessly create multi-chain LPs that consist of native tokens from separate chains, and of any type, such as ETH-SOL, UNI-CAKE, USD-XXX and more. Multiple trading curves are supported: constant product curve (UNI V2), optimized stableswap curve (Curve.fi), and concentrated liquidity model (UNI V3) - in development.

A Seamless and Easy-to-Use Trading Experience

• With negligible slippage on stablecoins.

• No need to install multiple wallets from each chain.

Real-time settlement based on zk validity proofs

When traders perceive the "direct" cross-chain liquidity pairs composed of tokens from two separate chains, there is no actual "cross-chain" events happened. As illustrated below, traders only interact with Layer1 smart contracts deployed on both source and target chains, to be more evocative, with a "vault" on each chain containing a single kind of token - where liquidity providers "put" their money.

(Image source: zk.link)

Step 3 in the figure is elaborated in Multi-chain ZK-Rollup and Multi-chain AMM. In step 2, a Layer1_Watcher on zkLink Layer2 network is constantly monitoring Layer1 smart contract logs, and synchronizes parameters of each transaction to Layer2 engine for computation. Similarly in step 4, a Layer1_Sender passes the verified outcome to Layer1 contract on the according chain, which then transfers the wanted tokens to the trader. This is how zkLink Layer2 contract receives and send information from / to different Layer1 smart contracts.

• Supports NFT minting, multi-chain trading, and mapping from any L1 to zkLink L2.

• Massive NFT assets from multiple L1 and L2 ecosystems for any audience.

• A unified pricing numeraire for NFTs from different blockchains.