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Connectors: Implement Odos connector (#158)
Co-authored-by: Facu Spagnuolo <facundo_spagnuolo@icloud.com>
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packages/connectors/contracts/interfaces/odos/IOdosV2Connector.sol
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| // SPDX-License-Identifier: GPL-3.0-or-later | ||
| // This program is free software: you can redistribute it and/or modify | ||
| // it under the terms of the GNU General Public License as published by | ||
| // the Free Software Foundation, either version 3 of the License, or | ||
| // (at your option) any later version. | ||
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| // This program is distributed in the hope that it will be useful, | ||
| // but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| // GNU General Public License for more details. | ||
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| // You should have received a copy of the GNU General Public License | ||
| // along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
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| pragma solidity >=0.8.0; | ||
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| /** | ||
| * @title Odos V2 connector interface | ||
| */ | ||
| interface IOdosV2Connector { | ||
| /** | ||
| * @dev The token in is the same as the token out | ||
| */ | ||
| error OdosV2SwapSameToken(address token); | ||
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| /** | ||
| * @dev The amount out is lower than the minimum amount out | ||
| */ | ||
| error OdosV2BadAmountOut(uint256 amountOut, uint256 minAmountOut); | ||
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| /** | ||
| * @dev The post token in balance is lower than the previous token in balance minus the amount in | ||
| */ | ||
| error OdosV2BadPostTokenInBalance(uint256 postBalanceIn, uint256 preBalanceIn, uint256 amountIn); | ||
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| /** | ||
| * @dev Tells the reference to Odos aggregation router v2 | ||
| */ | ||
| function odosV2Router() external view returns (address); | ||
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| /** | ||
| * @dev Executes a token swap in Odos V2 | ||
| * @param tokenIn Token to be sent | ||
| * @param tokenOut Token to be received | ||
| * @param amountIn Amount of token in to be swapped | ||
| * @param minAmountOut Minimum amount of token out willing to receive | ||
| * @param data Calldata to be sent to the Odos aggregation router | ||
| */ | ||
| function execute(address tokenIn, address tokenOut, uint256 amountIn, uint256 minAmountOut, bytes memory data) | ||
| external | ||
| returns (uint256 amountOut); | ||
| } |
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| // SPDX-License-Identifier: GPL-3.0-or-later | ||
| // This program is free software: you can redistribute it and/or modify | ||
| // it under the terms of the GNU General Public License as published by | ||
| // the Free Software Foundation, either version 3 of the License, or | ||
| // (at your option) any later version. | ||
|
|
||
| // This program is distributed in the hope that it will be useful, | ||
| // but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| // GNU General Public License for more details. | ||
|
|
||
| // You should have received a copy of the GNU General Public License | ||
| // along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
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| pragma solidity ^0.8.0; | ||
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| import '@openzeppelin/contracts/token/ERC20/IERC20.sol'; | ||
| import '@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol'; | ||
| import '@openzeppelin/contracts/utils/Address.sol'; | ||
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| import '@mimic-fi/v3-helpers/contracts/utils/ERC20Helpers.sol'; | ||
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| import '../interfaces/odos/IOdosV2Connector.sol'; | ||
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| /** | ||
| * @title OdosV2Connector | ||
| * @dev Interfaces with Odos V2 to swap tokens | ||
| */ | ||
| contract OdosV2Connector is IOdosV2Connector { | ||
| // Reference to Odos aggregation router v2 | ||
| address public immutable override odosV2Router; | ||
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| /** | ||
| * @dev Creates a new OdosV2Connector contract | ||
| * @param _odosV2Router Odos aggregation router v2 reference | ||
| */ | ||
| constructor(address _odosV2Router) { | ||
| odosV2Router = _odosV2Router; | ||
| } | ||
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| /** | ||
| * @dev Executes a token swap in Odos V2 | ||
| * @param tokenIn Token to be sent | ||
| * @param tokenOut Token to be received | ||
| * @param amountIn Amount of token in to be swapped | ||
| * @param minAmountOut Minimum amount of token out willing to receive | ||
| * @param data Calldata to be sent to the Odos aggregation router | ||
| */ | ||
| function execute(address tokenIn, address tokenOut, uint256 amountIn, uint256 minAmountOut, bytes memory data) | ||
| external | ||
| override | ||
| returns (uint256 amountOut) | ||
| { | ||
| if (tokenIn == tokenOut) revert OdosV2SwapSameToken(tokenIn); | ||
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| uint256 preBalanceIn = IERC20(tokenIn).balanceOf(address(this)); | ||
| uint256 preBalanceOut = IERC20(tokenOut).balanceOf(address(this)); | ||
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| ERC20Helpers.approve(tokenIn, odosV2Router, amountIn); | ||
| Address.functionCall(odosV2Router, data, 'ODOS_V2_SWAP_FAILED'); | ||
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| uint256 postBalanceIn = IERC20(tokenIn).balanceOf(address(this)); | ||
| bool isPostBalanceInUnexpected = postBalanceIn < preBalanceIn - amountIn; | ||
| if (isPostBalanceInUnexpected) revert OdosV2BadPostTokenInBalance(postBalanceIn, preBalanceIn, amountIn); | ||
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| uint256 postBalanceOut = IERC20(tokenOut).balanceOf(address(this)); | ||
| amountOut = postBalanceOut - preBalanceOut; | ||
| if (amountOut < minAmountOut) revert OdosV2BadAmountOut(amountOut, minAmountOut); | ||
| } | ||
| } |
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| import axios, { AxiosError } from 'axios' | ||
| import { BigNumber, Contract } from 'ethers' | ||
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| const ODOS_URL = 'https://api.odos.xyz' | ||
| export type SwapResponse = { data: { transaction: { data: string } } } | ||
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| export async function getOdosSwapData( | ||
| chainId: number, | ||
| sender: Contract, | ||
| tokenIn: Contract, | ||
| tokenOut: Contract, | ||
| amountIn: BigNumber, | ||
| slippage: number | ||
| ): Promise<string> { | ||
| try { | ||
| const response = await getSwap(chainId, sender, tokenIn, tokenOut, amountIn, slippage) | ||
| return response.data.transaction.data | ||
| } catch (error) { | ||
| if (error instanceof AxiosError) throw Error(error.toString() + ' - ' + error.response?.data?.description) | ||
| else throw error | ||
| } | ||
| } | ||
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| async function getSwap( | ||
| chainId: number, | ||
| sender: Contract, | ||
| tokenIn: Contract, | ||
| tokenOut: Contract, | ||
| amountIn: BigNumber, | ||
| slippage: number | ||
| ): Promise<SwapResponse> { | ||
| const response = await axios.post( | ||
| `${ODOS_URL}/sor/quote/v2`, | ||
| { | ||
| chainId, | ||
| inputTokens: [ | ||
| { | ||
| tokenAddress: tokenIn.address, | ||
| amount: amountIn.toString(), | ||
| }, | ||
| ], | ||
| outputTokens: [ | ||
| { | ||
| tokenAddress: tokenOut.address, | ||
| proportion: 1, | ||
| }, | ||
| ], | ||
| userAddr: sender.address, | ||
| slippageLimitPercent: slippage < 1 ? slippage * 100 : slippage, // The value is 0.5 -> 0.5% | ||
| }, | ||
| { | ||
| headers: { | ||
| 'Content-Type': 'application/json', | ||
| Accept: 'application/json', | ||
| }, | ||
| } | ||
| ) | ||
| const pathId = response.data.pathId | ||
| return await axios.post( | ||
| `${ODOS_URL}/sor/assemble`, | ||
| { | ||
| userAddr: sender.address, | ||
| pathId: pathId, | ||
| }, | ||
| { | ||
| headers: { | ||
| 'Content-Type': 'application/json', | ||
| Accept: 'application/json', | ||
| }, | ||
| } | ||
| ) | ||
| } |
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packages/connectors/test/helpers/kyberswap/fixtures/8453/14845449/WETH-USDC.json
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