SyncSwap (syncswap)

DEX on zkSync Era. Supports classic constant product pools and stable pools with native account abstraction support.

What it offers

swap: Swap tokens via path-based routing with encoded swap data and step-based execution

Swap data (data field in steps) must be ABI-encoded off-chain: abi.encode(tokenIn, recipient, withdrawMode)
withdrawMode: 0 = keep in vault (for chaining), 1 = withdraw to user wallet, 2 = unwrap WETH to native ETH
Each path can have multiple steps (multi-hop), and you can include multiple paths in one transaction
Steps support callbacks for flash-swap-like patterns (set to zero address for standard swaps)
Pool addresses must be discovered off-chain (via SyncSwap’s factory or API)
zkSync-only deployment
Input token must be ERC20-approved to the Router

On zkSync Era, Syncswap is a namespace: its contracts need no import.

function main() {
  // zkSync Era's router, `0x2da10A1e27bF85cEdD8FFb1AbBe97e53391C0295`.
  require(Syncswap.Router != 0);
}

Chain	Contract	Address	In a program
zkSync Era	router	`0x2da10A1e27bF85cEdD8FFb1AbBe97e53391C0295`	`Syncswap.Router`

import SyncSwapRouterABI from "./protocols/syncswap/SyncSwapRouterABI.json"; Speaks for: router.

swap(((address pool, bytes data, address callback, bytes callbackData)[] steps, address tokenIn, uint256 amountIn)[] paths, uint256 amountOutMin, uint256 deadline) payable returns ((address token, uint256 amount) amountOut)