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Frequently Asked Questions

Common questions about AchSwap and AchMarket.

General​

What is AchSwap?​

AchSwap is a decentralized exchange (DEX) built on ARC Testnet, supporting V2, V3, and V4 liquidity pools with smart routing, aggregator split routing, gasless swaps, and cross-chain bridging.

What is AchMarket?​

AchMarket is a decentralized prediction market platform where users can create markets, trade outcome shares, and earn from platform fees.

What network do they run on?​

Both run on ARC Testnet (Chain ID: 5042002).

What's the native token?​

USDC is the native gas token on ARC Testnet.

AchSwap​

How do I add liquidity?​

  1. Go to Add Liquidity
  2. Choose V2, V3, or V4
  3. Select token pair
  4. Enter amounts
  5. Confirm transaction

What's the difference between V2, V3, and V4?​

  • V2: Classic AMM, full range liquidity, single 0.3% fee tier
  • V3: Concentrated liquidity, higher potential returns, multiple fee tiers (0.01%-10%)
  • V4: Hook-enabled singleton pools, configurable fees, custom logic hooks

How are fees earned?​

V2: Earn a share of trading fees proportional to your pool share. V3: Earn fees when price stays within your selected range. V4: Similar to V3, plus potential additional rewards from hook contracts.

What is smart routing?​

Smart routing automatically finds the best swap path across V2, V3, and V4 pools to get you the best rate.

What is the aggregator?​

The aggregator splits your trade across multiple protocols (V2, V3, V4) to minimize price impact and maximize output. It charges a 0.1% fee on the gross output.

What are gasless swaps?​

Gasless swaps let you sign a swap transaction and have the relayer submit it on your behalf, so you don't need native USDC for gas. See Gasless Swap for details.

What are RWA pairs?​

RWA (Real World Asset) pairs allow trading tokenized traditional assets like stocks, commodities, and forex. See the AchRWA documentation for details.

How do I use the bridge?​

  1. Go to Bridge
  2. Select source chain
  3. Enter USDC amount
  4. Click Bridge
  5. Wait for attestation
  6. Receive USDC on ARC

AchMarket​

How do prediction markets work?​

You buy shares in outcomes (e.g., Yes/No). If your outcome wins, you redeem shares for a pro-rata payout from the pool.

What's LMSR?​

LMSR (Logarithmic Market Scoring Rule) is the pricing algorithm that dynamically prices shares based on trading volume.

How do I create a market?​

Connect as owner → Navigate to Create Market → Fill details → Confirm transaction

What happens when a market resolves?​

  1. Winning outcome is set
  2. 0.25% fee deducted
  3. Winners can claim payouts

What happens if a market is cancelled?​

No fee is collected. All traders can claim full refunds based on their deposits.

How much are platform fees?​

0.25% (only on resolved markets, never on cancelled).

What do the market stability tags mean?​

Markets are tagged based on their liquidity parameter (b):

Tagb ValueWhat it means
Degen Market0-5,000High risk, large price swings
Highly Unstable5,001-10,000Very volatile
Unstable10,001-25,000Moderate volatility
Stable25,001-50,000Lower volatility
Highly Stable50,001-100,000Very stable prices
Extremely Stable100,001-250,000Near-stable
Whale Stable250,001+Designed for large trades

Lower b = more speculative, higher potential returns but also bigger losses. Higher b = more stable, better for larger positions without moving the price much.

Which stability level should I choose?​

  • Degen/Unstable: For speculative short-term bets, smaller markets
  • Stable: For general use, balanced risk/reward
  • Highly Stable+: For markets expecting high volume, or large positions

The b parameter is set at market creation and cannot be changed later.

Wallets & Network​

Which wallets are supported?​

MetaMask, Coinbase Wallet, WalletConnect, Rainbow, Trust Wallet, and any RainbowKit-compatible wallet.

How do I add ARC Testnet?​

Network details:

How do I get test USDC?​

Use the Bridge on AchSwap to transfer USDC from other testnets (Sepolia, Fuji, etc.)

Trading​

Why did my transaction revert?​

Common reasons:

  • Slippage exceeded (price moved too much)
  • Insufficient balance
  • Network congestion

What is slippage tolerance?​

The maximum price change you're willing to accept. If market moves beyond this, transaction reverts.

How is price impact calculated?​

Price impact shows how your trade affects the pool price. Larger trades relative to pool size = higher impact.

Troubleshooting​

"Insufficient liquidity"​

  • Try a smaller amount
  • The pool may not exist

"Transaction failed"​

  • Check balance
  • Increase slippage tolerance
  • Try again later

Wallet not connecting​

  • Refresh page
  • Check wallet extension
  • Try incognito mode

Network not found​

  • Manually add ARC Testnet
  • Ensure using correct RPC URL
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