# StableSwap (stableswap.xyz)

> StableSwap is a cross-chain stablecoin swap protocol across Sui, Aptos, Solana, Ethereum, Arbitrum, Base, Avalanche, Optimism, and Polygon

## What is StableSwap?

StableSwap (stableswap.xyz) enables cross-chain stablecoin swaps using Circle's CCTP V2 for settlement. Deposit USDC or USDT on one chain, receive your chosen stablecoin on another.

## How it works

1. User deposits stablecoin on a source chain
2. CCTP burns USDC; swap instructions delivered via CCTP V2 Hooks or LayerZero
3. Permissionless solver fulfills order on the destination chain
4. Settlement contract swaps and delivers to user

## Key features

- CCTP V2 settlement (Circle's burn-and-mint, no wrapped tokens)
- Permissionless solvers (anyone can relay, no single operator)
- Trustless fallback (24h timeout returns raw USDC)
- Atomic transactions (all-or-nothing execution)

## Chains

- Sui (source/destination)
- Aptos (source/destination)
- Ethereum (source/destination)
- Arbitrum (source/destination)
- Base (source/destination)
- Avalanche (source/destination)
- Polygon (source/destination)
- Solana (source/destination)

## Tokens

- USDC
- USDT

## Timing

- Typical swap: 30-50 seconds
- Circle attestation: 15-30 seconds
- Fallback available: 24 hours

## Fees

- Messaging: ~0.28 SUI (Sui), ~0.005 ETH (Ethereum), varies by chain
- CCTP V2: Zero (1:1 burn-mint)
- DEX swap: ~0.01%
- Protocol fee: Zero

## Trust assumptions

1. Circle CCTP V2 (you already trust if holding USDC)
2. LayerZero DVNs (message authentication, Sui/Aptos routes only)
3. DEX AMMs (execution venue, min_output protects user)
4. Solvers (zero trust, permissionless, no custody)

## Links

- Website: https://stableswap.xyz
- Docs: https://docs.stableswap.xyz
- Protocol: https://github.com/boldlabs/stableswap-protocol

## Contact

For integration inquiries, visit https://stableswap.xyz