文件列表:

.env.sample (781, 2023-04-18)
.husky (0, 2023-04-18)
.husky\pre-commit (84, 2023-04-18)
.husky\pre-push (77, 2023-04-18)
.prettierrc.json (256, 2023-04-18)
.solhint.json (413, 2023-04-18)
LICENSE (35148, 2023-04-18)
docs (0, 2023-04-18)
docs\adding-new-adapter.md (7881, 2023-04-18)
hardhat.config.js (3252, 2023-04-18)
package.json (2112, 2023-04-18)
src (0, 2023-04-18)
src\abis (0, 2023-04-18)
src\abis\ArableSFAdapter.json (6750, 2023-04-18)
src\abis\BalancerlikeAdapter.json (7102, 2023-04-18)
src\abis\BridgeMigrationAdapter.json (6776, 2023-04-18)
src\abis\BridgeToken.json (12151, 2023-04-18)
src\abis\BytesManipulation.json (422, 2023-04-18)
src\abis\Curve1Adapter.json (6935, 2023-04-18)
src\abis\Curve2Adapter.json (6933, 2023-04-18)
src\abis\CurveDeUSDCAdapter.json (7512, 2023-04-18)
src\abis\CurveLikeAdapter.json (6940, 2023-04-18)
src\abis\CurveMimAdapter.json (7281, 2023-04-18)
src\abis\CurveMoreAdapter.json (7515, 2023-04-18)
src\abis\CurvePlainAdapter.json (6933, 2023-04-18)
src\abis\CurvelikeMetaAdapter.json (7766, 2023-04-18)
src\abis\ERC20.json (5272, 2023-04-18)
src\abis\ERC20Burnable.json (5551, 2023-04-18)
src\abis\GeodeWPAdapter.json (8214, 2023-04-18)
src\abis\GmxAdapter.json (7999, 2023-04-18)
src\abis\IAdapter.json (1597, 2023-04-18)
src\abis\IBasePool.json (230, 2023-04-18)
src\abis\ICurve1.json (1475, 2023-04-18)
src\abis\ICurve2.json (1467, 2023-04-18)
src\abis\ICurveLikePool.json (3243, 2023-04-18)
src\abis\ICurveMim.json (1899, 2023-04-18)
src\abis\ICurvePlain.json (1536, 2023-04-18)
... ...

# [](https://yieldyak.com/swap) YakSwap Dex aggregator for EVM chains. UI available [here](https://yieldyak.com/swap). ## About YakSwap is a set of smart contracts for optimal path finding between two assets and execution of that path. For input&output token and input-amount optimal path should have a greatest net amount-out by considering execution gas-cost. Search is performed by calling on-chain query-methods and can be called by anyone. However, user should avoid calling query-methods in a mutative call due to a very large gas-cost associated with a call. ## Usage ### Router YakRouter is the user-facing interface to check prices and make trades. See example off-chain usage [here](./src/examples/debridge/main.js). | Chain | Address | | ----------- | ----------- | | Avalanche | [`0xC4729E56b831d74bBc18797e0e17A295fA77488c`](https://snowtrace.io/address/0xc4729e56b831d74bbc18797e0e17a295fa77488c) | | Arbitrum | [`0xb32C79a25291265eF240Eb32E9faBbc6DcEE3cE3`](https://arbiscan.io/address/0xb32C79a25291265eF240Eb32E9faBbc6DcEE3cE3) | | Optimism | [`0xCd887F78c77b36B0b541E77AfD6F91C0253182A2`](https://optimistic.etherscan.io/address/0xCd887F78c77b36B0b541E77AfD6F91C0253182A2) | #### **findBestPathWithGas** Finds the best path from tokenA to tokenB. Considers path's amount-out and its gas-cost. ```solidity function findBestPathWithGas( uint256 _amountIn, address _tokenIn, address _tokenOut, uint256 _maxSteps, uint256 _gasPrice ) external view returns (FormattedOffer memory); ``` | Input params | Details | | ------------ | ------- | | amountIn | Amount of tokens being sold | | tokenIn | ERC20 token being sold | | tokenOut | ERC20 token being bought | | steps | Max number of steps for path finding (must be less than 4) | | gasPrice | Gas price in gwei that will be used to estimate gasCost of each step | ```solidity struct FormattedOffer { uint256[] amounts; address[] adapters; address[] path; uint256 gasEstimate; } ``` | Return arg | Details | | ---------- | ---------------------------------------------------------------------------------------------- | | amounts | Amount of token being swapped for each step. First amount is `_amountIn` and last `amountOut`. | | adapters | Addresses of adapters through which trade goes. | | path | Addresses of tokens through which trade goes. First token is `_tokenIn` and last `_tokenOut`. | | gasEstimate | Rough estimate for gas-cost of all swaps. Gas estimates only include gas-cost of swapping and querying on adapter and not intermediate logic, nor tx-gas-cost. | #### **swapNoSplit** Executes trades through provided path. ```solidity function swapNoSplit( Trade calldata _trade, address _to, uint256 _fee ) external; ``` | Input param | Details | | ----------- | ------- | | _trade | Arguments used for swapping | | _to | Reciever address | | _fee | Optional fee in bps taken before the trades | ```solidity struct Trade { uint256 amountIn; uint256 amountOut; address[] path; address[] adapters; } ``` | Param | Details | | -------- | -------- | | amountIn | Amount of tokens being sold | | amountOut | Amount of tokens being bought | | path | Tokens being traded in respective order | | adapters | Adapters through which tokens will be traded in respective order | ### Adapter Adapters act as a common interface for YakRouter to interact with external contracts. Adapters offers methods: `query` and `swap`. ```solidity function query( uint256 _amountIn, address _tokenIn, address _tokenOut ) external view returns (uint256); function swap( uint256 _amountIn, uint256 _amountOut, address _fromToken, address _toToken, address _to ) external; ``` After setting up this repo call `npx hardhat list-adapters --network {network-id}` to get a list of live adapters and their addresses. Or see [`deployOptions`](./src/misc/deployOptions.js) for a list of live adapters per chain. ## Local Development and testing ### Install Dependencies ``` yarn install ``` ### Set Environmental Variables ``` cp .env.sample > .env ``` ### Actions #### Test Test for chain: ``` yarn test:{network-id} ``` Test individual: ``` npx hardhat test {path to the test/tests | empty to run all} ``` #### Deploy ``` yarn deploy:{network-id} ``` #### Verify ``` npx hardhat verify-contract --deployment-file-path {path to deployment file} --network {your network tag} ``` #### Query ``` npx hardhat find-best-path {fixed-amount-in} {token-in symbol/address} {token-in symbol/address} --network {network tag} ``` Example: ``` npx hardhat find-best-path 1000 USDC yyAVAX --network avalanche ``` ## Misc * Static-Quoters used in KyberElastic, UniswapV3 and Quickswap adapters are published [here](https://github.com/eden-network/uniswap-v3-static-quoter). ## Audits and Security This project is not audited. Use at your own risk. For any questions or bug reports reach out via Telegram group [YakDevs](https://t.me/yakdevs) or its admins. --- Project is licensed under GPL-3, although some parts of it might be less restrictive. Copyright 2021 Yield Yak

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