Acala (ACA)

The project launched Acala testnet in 2020 and competed in Polkadot's parachain auctions, winning a slot in December 2021. Acala mainnet launched on Polkadot in December 2021, immediately establishing itself as the ecosystem's primary DeFi infrastructure through comprehensive financial primitives.

Opening

Acala is the DeFi and liquidity hub of the Polkadot ecosystem. It provides essential financial infrastructure through stablecoin protocols, decentralized exchange, and liquid staking. Founded by experienced Substrate engineers—Bette Chen, Bryan Chen, Fuyao Jiang, and Ruitao Su—Acala pioneered multi-collateral stablecoin protocols within Polkadot while committing to progressive decentralization toward full DAO governance. The aUSD stablecoin serves as a critical bridge asset across Polkadot parachains, while LDOT (Liquid Staked DOT) unlocks liquidity for Polkadot's base token. Acala experienced a significant security incident in August 2022 that caused aUSD to depeg—raising concerns about decentralization when the network paused operations. The project has recovered and continues developing enhanced governance and mechanisms to prevent similar exploits while moving toward true decentralized autonomous organization status.

History and founding

Acala was founded in 2019 by early Substrate engineers who recognized that Polkadot's multi-chain vision needed foundational DeFi infrastructure. Core founders Bette Chen and Ruitao Su participated in the first Substrate Hackathon in 2019, while Bryan Chen contributed core Substrate and Polkadot code. Fuyao Jiang completed the founding team with additional engineering.

On August 12, 2022, Acala experienced a critical security exploit. A misconfigured iBTC/aUSD liquidity pool allowed hackers to mint 1.28 billion aUSD tokens, crashing the stablecoin from $1.00 to $0.01. The incident exposed tensions between Acala's claims of censorship-resistance and its ability to freeze funds instantly, raising decentralization concerns when the network paused operations to limit damage.

The Acala community voted to destroy the minted tokens through controlled burns, restoring the dollar peg by August 16, 2022. Recovery was successful, but the incident sparked significant governance reforms focused on preventing future exploits through enhanced code review and decentralization improvements.

Following the 2022 recovery, Acala implemented Ambassador Program V3 (approved July 2025) to decentralize community moderation and introduce tiered governance roles with ACA rewards. The protocol detailed a multi-phase plan in Q1 2025 focused on cross-chain liquidity integration and aUSD ecosystem expansion, with milestones including Ecosystem Growth Fund activation targeting Q1 2026.

Technical architecture

Acala runs as a Polkadot parachain, inheriting consensus security from the Polkadot Relay Chain while implementing specialized DeFi features optimized for lending, borrowing, staking, and token exchange.

Acala uses Delegated Proof of Stake inherited from Polkadot, where token holders delegate voting to collators who produce blocks. This consensus model provides security through economic incentives while enabling community participation in validator selection.

Acala targets 12-second block times with transaction finality around 30 seconds. While slower than some Layer 1 chains, finality is deterministic and unavoidable once achieved, providing strong security guarantees critical for financial applications managing collateral and liquidations.

Acala implements EVM+ (EVM Plus), a modified Ethereum Virtual Machine supporting Solidity while providing native access to Polkadot-specific functionality like XCM cross-chain messaging. This approach lets developers use Ethereum tools and libraries while accessing Polkadot interoperability unavailable on Ethereum.

At Acala's core sits the Honzon Protocol, a multi-collateral stablecoin engine inspired by MakerDAO. The protocol manages Collateralized Debt Positions (CDPs) where users lock crypto assets as collateral to mint aUSD stablecoin. The Honzon Protocol includes:

CDP Engine: Manages collateral valuations, liquidation ratios, and risk parameters with automatic adjustments based on market conditions.

Liquidation Mechanism: Hybrid system combining built-in DEX mechanics with collateral auctions to maintain collateral ratios.

Risk Management: Multi-layered controls including interest rate adjustments, debt ceiling management, and emergency shutdown capabilities.

ACA Backstop: If CDP liquidations fail to maintain solvency, ACA tokens are automatically minted and sold to recapitalize the protocol.

Acala Swap is a decentralized exchange providing liquidity infrastructure and price discovery for Polkadot assets, using standard Automated Market Maker mechanics with variable fee tiers.

The Homa Protocol enables liquid staking, letting DOT holders stake tokens while maintaining liquidity through LDOT (Liquid Staked DOT). Users receive LDOT tokens representing their staked position and can use LDOT in DeFi applications, eliminating the capital inefficiency of standard staking where tokens are locked and illiquid.

Ecosystem and adoption

Acala has built the largest DeFi ecosystem on Polkadot, with aUSD serving as the primary bridge asset across multiple parachains and as collateral for various DeFi protocols.

aUSD is designed as Polkadot's native stablecoin, offering censorship-resistant value transfer across the ecosystem. Over 5 million DOT tokens have been staked through the Homa protocol, representing substantial user trust in the liquid staking mechanism despite the 2022 security incident.

aUSD integrates across Polkadot parachains including Moonbeam, Astar, and others, serving as critical liquidity bridge. The 2025-2026 roadmap emphasizes deeper cross-chain liquidity integrations, recognizing that stablecoin utility depends on seamless multi-chain availability.

Major protocols have integrated aUSD, including lending platforms, yield aggregators, and DEXs. These integrations create network effects where aUSD utility drives adoption and vice versa.

Acala committed $250 million in venture backing in March 2022 (alongside leading VCs) to DeFi investments in the Polkadot ecosystem, signaling institutional confidence despite subsequent challenges.

Exchanges, wallets, and infrastructure

ACA token is listed on leading exchanges including Binance, Kraken, Kucoin, and Gate.io, providing institutional-grade liquidity and fiat access.

Polkadot-native wallets including Polkadot.js and Nova Wallet support Acala, while aUSD is increasingly supported across multi-chain wallets as integration deepens.

Acala Swap and partnerships with other Polkadot DEXs like StellaSwap provide on-chain liquidity for ACA and aUSD trading.

The Acala Wiki and API documentation provide comprehensive developer resources for integrating Acala's DeFi primitives into dApps.

Tokenomics

ACA launched in January 2022 as Acala's governance and utility token, representing ownership and governance rights within Acala Network with a capped supply of 200 million tokens.

The original distribution included allocations for the core team, community incentives, early supporters, and ecosystem development. Token vesting schedules released allocations gradually to prevent large dumps and reduce sell pressure.

ACA holders participate in governance through referendums and council elections. Token weight translates directly to voting power in network decisions, including risk parameter adjustments and protocol upgrades.

Transaction fees on Acala denominate in ACA, with a portion burned to create deflationary mechanics. This aligns long-term holders' interests with network success since increased adoption drives fee burn.

Acala's long-term economic design includes a Sovereign Wealth Fund that captures surplus from various treasuries and manages assets according to community-approved investment strategies, creating self-sustaining DeFi infrastructure.

Governance and development

Acala implements a progressive decentralization model designed to eventually transition to full DAO governance where community token holders control all significant protocol decisions.

The network operates through a two-chamber system:

General Council: The primary governance body that proposes and votes on referendums.

ACA Referendum: Direct democracy mechanism letting token holders vote on proposals.

The General Council appoints specialized councils managing specific aspects:

Honzon Council: Manages financial risk parameters and stablecoin protocol.

Homa Council: Governs liquid staking protocol and staking parameters.

Technical Council: Oversees technical upgrades and implementation details.

Acala maintains multiple treasuries:

ACA Treasury: Holds network income and manages core expenses.

Protocol Treasuries: Individual protocols maintain separate treasuries for income and expenses.

Ecosystem Fund: Directs resources toward ecosystem development and growth initiatives.

The Ambassador Program V3 (approved July 2025) introduced tiered governance roles with ACA rewards, enabling grassroots participation in governance and community advocacy. A proposed $2 million fund redirect toward liquidity mining and partnerships is under 2025-2026 consideration.

Acala's governance roadmap explicitly targets eventual transformation into a self-sustaining DAO where token holders manage all significant decisions, including investment strategies and economic parameters.

Regulatory status

Acala operates within frameworks applicable to decentralized financial platforms and stablecoin protocols, with regulatory complexity varying by jurisdiction.

aUSD's design as a censorship-resistant stablecoin means Acala monitors global stablecoin regulations. The 2022 incident where the network paused operations to prevent additional aUSD minting exposed regulatory ambiguity around whether decentralized stablecoins should be regulated like centralized ones.

As a Polkadot parachain, Acala benefits from Polkadot's clearer regulatory positioning as an application platform rather than direct financial service provider. However, as DeFi infrastructure, Acala faces evolving regulations.

The distributed nature of Acala's team and the protocol's global accessibility mean multiple regulatory jurisdictions apply, creating compliance complexity.

Controversies and risk factors

The critical aUSD collapse in August 2022 remains the most significant controversy in Acala's history. A misconfigured liquidity pool allowed hackers to mint 1.28 billion aUSD tokens, crashing the stablecoin to $0.01 before recovery through emergency burns. The incident raised fundamental questions about whether "decentralized" protocols can freeze operations when needed, the centralization-security tradeoff in DeFi, and whether code is immutable law or merely governance decisions.

Critics noted the irony that Acala, marketed as censorship-resistant DeFi, deployed emergency pause mechanisms and could freeze user funds instantly. This contradicted narratives of unstoppable protocols and forced acknowledgment that all blockchains involve tradeoffs between decentralization and risk management.

The transition toward full DAO governance requires resolving complex questions about treasury management, validator incentives, and protocol economics without centralized guidance. This represents genuine technical and social governance challenges.

As other Polkadot parachains implement EVM compatibility and DeFi features, Acala's differentiation narrows. Continued innovation is required to maintain ecosystem relevance.

The Honzon Protocol's liquidation mechanism depends on functioning markets and collateral liquidity. During extreme market conditions, liquidation cascades could emerge where falling collateral prices trigger liquidations that further reduce prices, potentially destabilizing the aUSD peg.

Recent developments

Acala detailed a comprehensive phased development plan in Q1 2025 emphasizing cross-chain liquidity integration and aUSD ecosystem expansion. The roadmap prioritizes enhanced aUSD integrations across Polkadot parachains, improved bridging infrastructure to reduce friction, strategic partnership agreements with major protocols, and governance decentralization milestones extending through 2026. These phases reflect recognition that stablecoin utility depends on seamless multi-chain availability and deep institutional partnerships.

Approved via on-chain governance in July 2025, the Ambassador Program V3 represents significant governance innovation by decentralizing community moderation and advocacy through tiered roles:

Content Creators: Earn ACA tokens for creating educational materials and content.

Technical Contributors: Support developers integrating Acala protocols.

Community Advocates: Represent geographic regions and promote ecosystem adoption.

This initiative directly addresses governance decentralization goals outlined in the protocol's long-term vision toward full DAO operation.

Acala is considering redirecting remaining ecosystem contest funds (approximately $2 million equivalent in ACA) toward high-impact initiatives including liquidity mining programs on major DEXs (increasing aUSD trading depth), strategic partnerships with payment providers, development grants for ecosystem applications, and cross-chain bridge infrastructure improvements. Final voting is expected by late 2025 with deployment targeting early 2026, representing meaningful treasury capital allocation decisions made by community governance.

The 2025-2026 roadmap emphasizes expanding aUSD acceptance across Polkadot parachains including Moonbeam, Astar, and emerging parachains. The vision positions aUSD as Polkadot's native settlement layer for cross-chain value transfer, similar to how USDC and USDT serve the Ethereum ecosystem.

Post-2022 incident, Acala has focused on demonstrating security maturity through enhanced code review processes, gradual feature rollouts with extended testing, transparent communication about security measures, and governance reforms preventing emergency fund freezes without approval. These efforts aim to restore community confidence in Acala's security and decentralization commitments.

FAQ

Q: What is aUSD and how does it maintain its peg to the US dollar?

A: aUSD is Acala's multi-collateral stablecoin created through the Honzon Protocol. Users lock crypto assets (like DOT or LDOT) as collateral to mint aUSD at predetermined collateral ratios. The peg is maintained through supply and demand dynamics, automatic liquidation of undercollateralized positions, and ACA token mechanisms that backstop the system if liquidations fail.

Q: Did the August 2022 aUSD depeg event resolve?

A: Yes, the depeg resolved through emergency token burns approved via community governance. The network paused operations temporarily, allowed the community to vote on an emergency burn mechanism, and successfully restored aUSD to $1.00 by August 16, 2022. The incident sparked governance reforms to prevent similar exploits.

Q: What is LDOT and why would I want it instead of regular staking DOT?

A: LDOT is Liquid DOT from Acala's Homa protocol. When you stake DOT through Homa, you receive LDOT representing your staked position. LDOT is tradable and usable in DeFi while earning staking rewards, solving the capital efficiency problem of traditional staking where DOT is locked and illiquid. This has attracted over 5 million DOT to Acala's liquid staking.

Q: How does the Honzon Protocol differ from MakerDAO?

A: Both use multi-collateral CDP (Collateralized Debt Position) mechanics to mint stablecoins, but Acala adapted MakerDAO's design for Polkadot's environment. Key differences include support for Polkadot-native assets as collateral, integration with XCM cross-chain messaging, and governance structures aligned with Polkadot's delegation model.

Q: What are the risks of Acala's stablecoin system?

A: Risks include liquidation cascades during extreme market crashes where falling collateral prices trigger liquidations that further reduce prices, governance failures in emergency risk management, and reliance on Polkadot's security (if Polkadot is compromised, Acala is compromised).

Q: Is Acala fully decentralized?

A: Acala is implementing progressive decentralization but is not yet fully decentralized. The General Council retains significant power, and specialized councils manage protocol parameters. The long-term vision targets full DAO governance, but this is aspirational rather than current state.

Q: How can I participate in Acala governance?

A: ACA token holders can participate by voting on referendums and council elections via the Polkadot.js interface. Alternatively, holders can delegate voting power to governance delegates who vote on their behalf.

Q: What makes Acala important to Polkadot's ecosystem?

A: Acala provides foundational DeFi infrastructure (stablecoins, DEX, liquid staking) that enables other parachains to build applications. aUSD serves as an ecosystem-wide settlement layer, while LDOT unlocks liquidity for Polkadot's base token, increasing capital efficiency across the ecosystem.

Polkadot (DOT) - Relay chain consensus and parachain infrastructure
Moonbeam (GLMR) - EVM-compatible parachain
Liquid Staking Protocols - LDOT, Lido, Rocket Pool comparison
Multi-Collateral Stablecoins - MakerDAO, Acala, Aave protocols
Polkadot Parachain Auctions - Slot mechanics and leasing