Blockchain ecosystem development with Layer-2 zk-Rollups

Innowise contributed to blockchain ecosystem development to help create solutions that make it easy for users to dive into DeFi with a full range of integrated tools.

10,468,929

total wallets created

15,418,995

total testnet transactions

Industry FinTech

Region Southeast Asia

Employees 11–50

Services Blockchain development, Smart contract development

Client since 2024

Client overview

Summarize article with AI

Haust Labs is a team of blockchain innovators that builds Haust Network, a next-gen Layer-2 solution aimed at harnessing the true power of permissionless blockchains. It’s designed for developers and DeFi innovators who want speed and flexibility without the high costs.

Built for performance and security, Haust keeps fees low while supporting rich DeFi functionality. It also comes with a purpose-built SDK that makes it easy to integrate blockchain features into Telegram and other messaging platforms.

Initially, we asked Innowise to develop only the lending protocol on top of our TestNet network. However, we soon realized that the lending protocol was the only component that truly worked in our TestNet. That’s when we decided to fully trust Innowise with building the decentralized exchange, our version of abstract accounts, the mobile app, the MultiSig wallet, and everything else required for launching our blockchain.

Anton Patrynika Co-Founder & CEO, Haust Lab

Challenge

While decentralized finance offers unparalleled freedom in terms of peer-to-peer transactions, the tech brings about a whole new set of challenges that the Haust Network aims to solve.

Barrier to mainstream adoption: Many DeFi platforms are unintuitive and overly complex, requiring users to understand wallets, gas fees, slippage, and smart contract interactions. This complexity alienates non-technical users and stalls adoption beyond the crypto-native community.
Liquidity fragmentation: With assets scattered across multiple blockchains and isolated DeFi protocols, users struggle to access deep liquidity, which leads to inefficient trades, increased slippage, and reduced capital efficiency.
High entry costs: Transaction fees on Layer-1 chains like Ethereum remain prohibitively high during peak usage periods. For small or first-time users, this creates a significant entry barrier and disincentivizes participation in DeFi.
User trust and safety: The prevalence of smart contract exploits, flash loan attacks, and rug pulls has damaged user confidence in DeFi. The lack of proper audit mechanisms and poor transparency increase the perceived risk for both retail and institutional users.

Lack of interoperability: Most DeFi protocols operate in siloed environments. Bridging assets or data between networks is often slow, insecure, and dependent on centralized or fragile solutions, which makes cross-chain operations complicated and exposes users to bridge risks.
Smart contract vulnerabilities: Errors in contract logic, inadequate test coverage, and insecure third-party dependencies create exploitable attack vectors. The lack of standardized security practices across ecosystems further intensifies this risk.
Scalability limitations: DeFi activity on Layer-1 networks suffers from congestion and limited throughput, which constrains growth and hampers real-time transaction execution, especially during market volatility.
Inefficient gas payment mechanisms: The traditional gas model, where users must pre-fund wallets with native tokens, adds friction to onboarding. Lack of flexible payment options (e.g., stablecoins, token sponsorships) hinders usability, particularly in cross-chain contexts.

Redefine what’s possible in DeFi

System architecture

Haust Network takes on the biggest challenges in DeFi by creating a complete ecosystem that removes barriers. Cross-chain compatibility makes moving assets between blockchains seamless, improves liquidity, and opens up DeFi to more users. Its smart liquidity solutions help optimize capital, cut slippage, and increase yields.

Solution we delivered

Here’s a closer look at what powers the network behind the scenes.

Zk-rollups and Polygon zkEVM

The Haust Network strategically integrates zk-rollups and Polygon zkEVM to address two major challenges in DeFi: high transaction costs and scalability issues.

Zero-Knowledge Rollups

As a Layer-2 scaling solution, zk-rollups bundle multiple transactions into one, processing them off-chain and submitting only a concise Zero-Knowledge Proof (ZKP) to the Layer-1 blockchain. This process verifies the validity of all transactions without revealing their details, significantly reduces on-chain data usage, speeds up transaction processing, and cuts fees.

Polygon zkEVM

Polygon zkEVM is an Ethereum-compatible Layer-2 solution that uses zk-rollups to deliver fast and cost-efficient transactions. Acting as a “Zero-Knowledge Ethereum Virtual Machine,” it enables developers to run Ethereum-compatible smart contracts using zero-knowledge proofs. This compatibility allows existing Ethereum applications to migrate to zkEVM with minimal adjustments to make integration with Haust Network seamless and efficient.

AggLAYER

AggLayer is a powerful bridge that connects multiple blockchains, making it super easy to move assets across networks. Instead of juggling a bunch of different bridges, users get a single, straightforward way to access cross-chain liquidity.

Using ZK proofs, AggLayer keeps every transaction secure, so you don’t have to worry about safety. It solves the problem of fragmented liquidity and ensures smooth, reliable interactions between blockchains.

AggLayer also lets all connected chains share their TVL (Total Value Locked) to simplify liquidity management. Users can even pay gas fees with HAUST, the network’s native token, which adds extra convenience to the cross-chain operations.

Account abstraction

Account abstraction lets users use smart contracts as their accounts. It is key to the Haust Network, transforming the Haust Wallet experience with features like Web2-style sign-in, keyless wallet management, social recovery, and smart gas fee handling.

Authorization controls: with account abstraction, users can set up custom permissions for their accounts, like requiring multiple signatures, adding time locks, or setting transfer limits. It also lets users restrict access to specific smart contracts for extra security.
Fee sponsorship: account abstraction lets a "paymaster" cover gas fees for users, so there’s no need to pre-fund transactions. This makes using blockchain services easier and removes the need to hold native tokens in Smart Contract Accounts (SCAs).
Flexible fee payments: instead of paying gas fees only in ETH, users can use any ERC-20 token, like stablecoins or HAUST. This makes transactions more convenient and flexible.
Pull transactions: users can set up automated payments and let third parties pull funds on a schedule. It’s like setting up a subscription, bringing familiar Web2-style payments into Web3.
Batch transactions: with account abstraction, users can bundle multiple approvals into a single transaction. This saves time and makes tasks like swapping tokens faster and less repetitive.
Wallet recovery: account abstraction supports social recovery, allowing users to regain access to their accounts through trusted contacts. It’s a user-friendly alternative to traditional wallet recovery methods.

Custom multi-signature wallet

As part of Haust Network’s modular architecture, the team developed a lightweight multi-signature wallet using its own abstract account system. At this stage of the project, there was no need to bring in a full external solution like Safe (formerly Gnosis Safe), which can be powerful but also heavy and complex. Instead, the team built a custom version that fits their current needs more efficiently.

The wallet handles multi-party authorization through smart contract logic, which means different roles can approve transactions in a secure and controlled way. Since it’s built directly on top of Haust’s abstract account layer, it works seamlessly with other features like gas fee abstraction, social recovery, and smart automation.

The result is a secure, efficient multi-sig solution that gives users shared control without the overhead of a third-party system. It’s a tailored approach that keeps everything aligned with Haust’s technical direction and ecosystem goals.

Haust DEX and Haust Lend

Haust Network includes two core protocols: Haust DEX, a decentralized exchange forked from Uniswap v3, and Haust Lend, a lending platform built as a fork of Aave v3. Both protocols were carefully adapted to integrate with Haust’s custom abstract account architecture, enabling advanced account logic and seamless user interactions.

Haust DEX

Haust DEX is a user-focused decentralized exchange that supports efficient token swaps and liquidity provision in a fully non-custodial environment. It inherits advanced features like concentrated liquidity and flexible fee tiers, while extending the protocol to function with Haust’s smart contract–based accounts. To improve transparency, the DEX includes a built-in explorer that provides real-time insights into Total Value Locked (TVL), token capitalization, and pool-level activity to help users evaluate liquidity conditions and make informed trading decisions.

To encourage participation, the team developed a custom liquidity incentives module, which rewards LPs with additional benefits beyond trading fees. This module is designed to increase pool depth and stimulate the attraction of liquidity to this blockchain.

Haust Lend

Haust Lend brings capital efficiency to the Haust ecosystem, allowing users to supply assets and earn interest, or to borrow against deposited collateral. As a fork of Aave v3, it retains the flexibility of overcollateralized borrowing while integrating with Haust’s abstract account system for better automation, access control, and gas abstraction.

Users can monitor lending pool health and liquidity in real time, with protocol-level metrics available directly through the UI. As with Haust DEX, all user interactions are non-custodial and fully compatible with Haust’s smart wallets and account abstraction features.

Dao governance model

To provide long-term sustainability and decentralized decision-making, Haust Labs is building a DAO that combines proven tokenomics with secure, modular infrastructure. The governance model draws inspiration from Curve Finance, using vote-escrowed tokens (veHAUST) and quadratic voting to balance influence across the community. HAUST holders can lock their tokens for a defined period to receive veHAUST, with voting power increasing based on both the amount locked and the lock duration. This governance logic is implemented on Aragon DAO smart contracts, which provide a robust and upgradeable on-chain framework for proposal management, permissions, and treasury control.

Governance scope

veHAUST holders govern multiple aspects of the protocol’s development, including:

Integration of new donor networks
Allocation of ecosystem grants to developers
Refinement of tokenomics and reward structures

All governance decisions are enforced through smart contracts to ensure trustless execution and full transparency.

Ecosystem incentives

To support protocol expansion and community contributions, the DAO also oversees:

Staking-based reward mechanics for long-term HAUST holders
A developer grant program, with funding allocated via quadratic voting
A bug bounty system for incentivized security research

Together, these systems make sure that governance is not only decentralized but also productive, with real economic incentives tied to active participation and contribution.

Haust wallet

The Haust Wallet is a secure, EVM-compatible wallet designed for effortless asset management across multiple chains. It offers innovative features like social recovery, keyless wallet access, multi-chain gas payments, and even a Telegram mini app for added convenience.

By integrating a decentralized exchange (DEX) based on Uniswap v3, the wallet contains advanced trading tools and improved liquidity management directly within the platform.

The wallet provides a consolidated, real-time view of the user’s holdings across multiple networks, thanks to seamless integration with AggLayer. This eliminates the need to switch networks manually and ensures better visibility into overall asset positions.

The wallet also supports dynamic NFTs issued by the Haust Labs team. These NFTs are natively integrated into the interface and may play roles in user identity, ecosystem access, or engagement mechanics.

In addition, the wallet comes with native integration of HAIA, Haust’s AI-powered financial assistant. Users can interact with HAIA directly inside the wallet to receive personalized recommendations, automate DeFi strategies, or navigate the ecosystem more efficiently.

Unified field data and yield sourcing with CryptoRank and Superform

To deliver a seamless, data-rich DeFi experience, Haust Network integrated multiple third-party services into its infrastructure, most notably CryptoRank and Superform. These integrations work together to power HAIA by providing both reliable market data and actionable investment opportunities.

Solving data fragmentation with CryptoRank

Prior to the integration, the Haust team faced several challenges:

Fragmented market data across multiple providers
Inconsistent or delayed token unlock information
High maintenance overhead from managing separate APIs
Limited visibility into early-stage project activity

The CryptoRank API resolved these issues with structured, high-quality endpoints:

Global market data (/global) → Real-time insight into total market cap, BTC/ETH dominance, and sentiment indicators like Fear & Greed
Trading pairs (/currencies/:id/full-metadata) → Live, accurate trading data for supported tokens across exchanges
Drophunting (/drophunting) → Airdrop feeds structured for immediate discovery and action
Token unlocks (/currencies/:id/vesting) → Detailed unlock schedules that reduce speculation and improve transparency
Funding rounds & token sales (/funds) → Visibility into early-stage investments and project lifecycle data, critical for analysts and DeFi builders

Cross-chain yield aggregation with Superform

To complement this data layer, Haust integrated Superform, a cross-chain yield marketplace that enables users to explore and invest in high-performing DeFi strategies across different networks. Instead of manually searching for yield opportunities, users can now:

Browse curated strategies from multiple chains
Compare APYs and risk profiles within a single interface
Allocate capital directly from the Haust Wallet or via HAIA
Access Superform’s vaults without bridging or switching networks

This integration turns Haust into a decision-to-execution platform, where users don’t just view data, but can act on it instantly. Combined, CryptoRank and Superform give HAIA the intelligence and the tools to guide users through market insights and profitable DeFi strategies.

Integration with CrossCurve

Haust Network’s integration with the CrossCurve MetaLayer marks a significant upgrade to its modular DeFi stack. By embedding CrossCurve’s multichain liquidity infrastructure directly into Haust’s smart account and AI systems, the integration enhances yield access, execution efficiency, and UX abstraction. Below are the core technical components of this collaboration:

Native wallet integration

Haust’s modular wallet architecture now includes native support for CrossCurve’s liquidity routing and aggregation layer. This enables asset swaps, rebalancing, and multichain yield strategies to be executed directly from the wallet UI without manual bridging, signature prompts, or network switching. All interactions are handled within the smart account layer via modular intent-based execution.

UX without friction

Through intent-driven account logic and backend liquidity orchestration, the user is abstracted from typical DeFi complexity. Network switching, wallet management, and DApp navigation are eliminated. Instead, users interact through a single interface where CrossCurve handles routing and liquidity, and Haust handles authorization and execution.

Human-centric DeFi interface

This integration moves DeFi closer to consumer-grade usability. The AI layer (HAIA), the wallet logic (MSAs), and the liquidity infrastructure (Superform) operate in tandem to convert user intent into on-chain execution. This is particularly impactful for mobile-first users, Telegram-based agents, and newcomers unfamiliar with manual DeFi workflows.

Technologies & tools

Backend
Frontend
Mobile
Databases
DevOps & infrastructure
QA & Testing
Project Tools

Backend

Language & frameworks

Java, Spring Framework

Architecture

Microservices (synchronous and asynchronous), Message Broker integration

Authentication & authorization

Custom account logic, smart contract interaction (non-custodial)

API communication

RESTful APIs, Internal API layer (for WeFi ecosystem/ITO/WeChain integration)

Frontend

Frameworks & languages

React, NestJS

UI design systems

Tailored to custom branding; integrated with mobile-friendly components

Mobile

Technology

Flutter (cross-platform for iOS & Android)

Payments

Google Pay, Apple Pay integration

Feature parity

Aligned with web/Telegram versions; adapted for mobile UX constraints

Databases

PostgreSQL

DevOps & infrastructure

CI/CD

GitHub Actions

Monitoring & logging

Grafana, Sentry

Orchestration

Kafka (for microservices coordination)

QA & Testing

Approach

Manual testing only; no test automation in place during core delivery

Structure

QA resources operated as shared microservice reassigned across product areas (web, mobile, WeChain) based on availability and sprint priorities

Project Tools

Jira, Confluence, Slack, Google Docs (used for tokenomics modeling and calculations by client-side mathematicians)

Backend

Language & frameworks

Java, Spring Framework

Architecture

Microservices (synchronous and asynchronous), Message Broker integration

Authentication & authorization

Custom account logic, smart contract interaction (non-custodial)

API communication

RESTful APIs, Internal API layer (for WeFi ecosystem/ITO/WeChain integration)

Frontend

Frameworks & languages

React, NestJS

UI design systems

Tailored to custom branding; integrated with mobile-friendly components

Mobile

Technology

Flutter (cross-platform for iOS & Android)

Payments

Google Pay, Apple Pay integration

Feature parity

Aligned with web/Telegram versions; adapted for mobile UX constraints

Databases

PostgreSQL

DevOps & infrastructure

CI/CD

GitHub Actions

Monitoring & logging

Grafana, Sentry

Orchestration

Kafka (for microservices coordination)

QA & Testing

Approach

Manual testing only; no test automation in place during core delivery

Structure

QA resources operated as shared microservice reassigned across product areas based on availability and sprint priorities

Project Tools

Jira, Confluence, Slack, Google Docs (used for tokenomics modeling and calculations by client-side mathematicians)

Team

Project Manager

Java Developerss

React Developers

Flutter Developers

QA Engineers

UX Designer

Product Designer

Business Analyst

Results

Project duration

October 2024 - Ongoing

As a result of our ongoing collaboration, the team behind Haust Network introduced a robust ecosystem for next-generation DeFi. Development is ongoing, with key achievements to date including:

Launch of a performant Layer-2 solution with seamless cross-chain compatibility, efficient asset transfers, and secure, low-cost infrastructure.
Release of the Haust Wallet, integrated with features like multi-chain gas payments, social recovery, and a Telegram Mini App for more intuitive, accessible DeFi interaction.
Introduction of HAIA, an AI-powered finance assistant enabling natural-language interaction and intent-based execution of DeFi strategies.
Integration of essential third-party infrastructure:
- CryptoRank API for unified access to market data, token unlock schedules, and airdrop intelligence.
- Superform for cross-chain yield discovery and investment in high-performing DeFi strategies.
- 1inch Fusion+ for efficient swaps, cross-chain swaps, and support for limit orders within the Haia.
- Mercuryo for fiat on-ramp functionality, enabling users to purchase crypto directly using traditional payment methods.
- CoinMarketCap API for live token pricing, market cap data, and supplemental analytics used by HAIA.
- Zerion API for on-chain wallet state checks, including token balances, LP positions, and multi-chain portfolio visibility.
Continued expansion of the ecosystem, focusing on AI-driven automation, developer-ready tooling, and an accessible user experience across messaging platforms and mobile environments.

Client overview
Challenge
System architecture
Solution
Technologies & tools
Team
Results

Redefine what’s possible in DeFi

Related cases

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Blockchain ecosystem development with Layer-2 zk-Rollups

Client overview

Challenge

Redefine what’s possible in DeFi

System architecture

Solution we delivered

Zk-rollups and Polygon zkEVM

Zero-Knowledge Rollups

Polygon zkEVM

AggLAYER

Account abstraction

Custom multi-signature wallet

Haust DEX and Haust Lend

Haust DEX

Haust Lend

Dao governance model

Governance scope

Ecosystem incentives

Haust wallet

Unified field data and yield sourcing with CryptoRank and Superform

Solving data fragmentation with CryptoRank

Cross-chain yield aggregation with Superform

Integration with CrossCurve

Native wallet integration

UX without friction

Human-centric DeFi interface

Technologies & tools

Backend

Language & frameworks

Architecture

Authentication & authorization

API communication

Frontend

Frameworks & languages

UI design systems

Mobile

Technology

Payments

Feature parity

Databases

DevOps & infrastructure

CI/CD

Monitoring & logging

Orchestration

QA & Testing

Approach

Structure

Project Tools

Backend

Language & frameworks

Architecture

Authentication & authorization

API communication

Frontend

Frameworks & languages

UI design systems

Mobile

Technology

Payments

Feature parity

Databases

DevOps & infrastructure

CI/CD

Monitoring & logging

Orchestration

QA & Testing

Approach

Structure

Project Tools

Team

Results

Table of contents

Redefine what’s possible in DeFi

Related cases

Contact us

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