An actually simple and gas-efficient DEX aggregator router with zAMM.
Each version has dedicated entrypoint function with similar args:
swapV2()swapV3()swapV4()swapVZ()swapCurve()
Features:
- cheapest singlehop for every single version of uniswap
- multihop through a simple call chain via
multicall() - slippage protection on each hop inside multihop chains
- bridges all liquid ERC20s with ERC6909 finance on zAMM
- includes WETH abstraction for all ETH input and output
V1 deployed to Ethereum: 0x00000000008892d085e0611eb8C8BDc9FD856fD3
V0 deployed to 0x0000000000404FECAf36E6184245475eE1254835 on Ethereum and Base.
Router helper (zQuoter) deployed to 0x907DAE8d75369A21fFf57402Fe29Ef4e95523465 on Ethereum.
And 0x772E2810A471dB2CC7ADA0d37D6395476535889a on Base.
Great for bots, on-the-fly strategies, and aggregation.
Bonus: Includes V2-style SushiSwap pools in swapV2().
Supports Aerodrome methods, swapAero(), swapAeroCL(). No SushiSwap. Otherwise ABI and Uniswap methods remain the same.
Onchain dapp deployment: base.zamm.eth
Ensure atomic token allowances for best security. Previous versions may not have allowance guard.
- If using hookless zamm (0x00...888), set
deadlinetotype(uint256).maxto trigger inswapVZ() - If using SushiSwap (classic), set
deadlinetotype(uint256).maxto trigger inswapV2()
Both case default deadline to (now) + 30 minutes, which is a reasonable staleness guard.
Summary: zRouter is most gas-efficient for routes between AMMs and single-hop swaps. zRouter consistently outgasses Uniswap routers for common paths — clean sweeps on V2 (single/multi), and on V3 and V4 singles, and sizable savings vs Universal Router on cross‑AMM routes (2/2 wins). Multihop V3/V4 paths are the next optimization target, and where gas loses out for sake of simplicity and multi-AMM handling.
| Type | Scenario | Baseline Gas | zRouter Gas | Diff | % Change |
|---|---|---|---|---|---|
| UR | V3TOV2 • Exact In | 228,586 | 186,362 | -42,224 | -18.47% |
| BASE | V2 • multi • exact-in • Tokens→USDC→ETH | 148,381 | 128,927 | -19,454 | -13.11% |
| BASE | V3 • single • exact-out • ETH→TOKEN | 138,927 | 123,450 | -15,477 | -11.14% |
| BASE | V3 • single • exact-in • TOKEN→ETH | 157,673 | 143,950 | -13,723 | -8.70% |
| UR | V2TOV3 • Exact In | 166,308 | 152,694 | -13,614 | -8.19% |
| BASE | V3 • single • exact-out • USDC→TOKEN | 124,616 | 117,419 | -7,197 | -5.78% |
| BASE | V3 • single • exact-in • TOKEN→USDC | 333,904 | 327,884 | -6,020 | -1.80% |
| BASE | V2 • single • exact-out • ETH→TOKEN | 91,351 | 85,455 | -5,896 | -6.45% |
| BASE | V2 • single • exact-out • TOKEN→TOKEN | 86,578 | 80,683 | -5,895 | -6.81% |
| BASE | V2 • single • exact-in • TOKEN→TOKEN | 86,589 | 80,977 | -5,612 | -6.48% |
| BASE | V2 • single • exact-in • TOKEN→ETH | 90,891 | 85,397 | -5,494 | -6.04% |
| BASE | V3 • single • exact-in • ETH→TOKEN | 115,588 | 110,209 | -5,379 | -4.65% |
| BASE | V2 • single • exact-out • TOKEN→ETH | 91,826 | 86,728 | -5,098 | -5.55% |
| BASE | V2 • single • exact-in • ETH→TOKEN | 84,379 | 80,209 | -4,170 | -4.94% |
| BASE | V2 • multi • exact-in • Tokens→ETH→USDC | 130,790 | 127,312 | -3,478 | -2.66% |
| BASE | V4 • single • exact-in • ETH→USDC | 92,368 | 90,080 | -2,288 | -2.48% |
| BASE | V3 • single • exact-out • TOKEN→ETH | 119,296 | 117,648 | -1,648 | -1.38% |
Run: curl -L https://foundry.paradigm.xyz | bash && source ~/.bashrc && foundryup
Build the foundry project with forge build. Run tests with forge test. Measure gas with forge snapshot. Format with forge fmt.
lib
├─ forge-std — https://github.com/foundry-rs/forge-std
├─ solady — https://github.com/vectorized/solady
src
├─ zRouter — Router Contract
test
├─ zRouter.t — Test Contract
└─ zRouterBench.t - BenchmarksThese smart contracts and testing suite are being provided as is. No guarantee, representation or warranty is being made, express or implied, as to the safety or correctness of anything provided herein or through related user interfaces. This repository and related code have not been audited and as such there can be no assurance anything will work as intended, and users may experience delays, failures, errors, omissions, loss of transmitted information or loss of funds. The creators are not liable for any of the foregoing. Users should proceed with caution and use at their own risk.
See LICENSE for more details.