├── .eslintrc.json ├── .gitattributes ├── .gitignore ├── .prettierrc.json ├── .solhint.json ├── .soliumignore ├── .soliumrc.json ├── LICENSE ├── README.md ├── config └── default.json ├── contracts ├── Migrations.sol ├── OracleSimple.sol ├── OracleSimpleFactory.sol ├── interfaces │ ├── IOracleSimple.sol │ └── IOracleSimpleFactory.sol └── uniswap │ ├── SafeMath.sol │ ├── UniswapV2Library.sol │ └── UniswapV2OracleLibrary.sol ├── deploy └── 0.2.0 │ └── contracts.json ├── migrations ├── 1_initial_migration.js └── 2_deploy_contracts.js ├── package-lock.json ├── package.json └── truffle-config.js /.eslintrc.json: -------------------------------------------------------------------------------- 1 | { 2 | "extends": "standard", 3 | "globals": { 4 | "artifacts": false, 5 | "contract": false, 6 | "beforeEach": false, 7 | "before": false, 8 | "it": false, 9 | "web3": false, 10 | "describe": false 11 | } 12 | } -------------------------------------------------------------------------------- /.gitattributes: -------------------------------------------------------------------------------- 1 | *.sol linguist-language=Solidity 2 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | node_modules 2 | build 3 | .env 4 | .secret_info 5 | 6 | -------------------------------------------------------------------------------- /.prettierrc.json: -------------------------------------------------------------------------------- 1 | { 2 | "printWidth": 100 3 | } -------------------------------------------------------------------------------- /.solhint.json: -------------------------------------------------------------------------------- 1 | { 2 | "extends": ["solhint:recommended"], 3 | "rules": { 4 | "prettier/prettier": "error", 5 | "avoid-throw": false, 6 | "avoid-suicide": "error", 7 | "avoid-sha3": "warn" 8 | }, 9 | "plugins": ["prettier"] 10 | } -------------------------------------------------------------------------------- /.soliumignore: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/bloq/sol-price-oracles/a38de3032112fb9ab1f5177c7e1acf64a6584936/.soliumignore -------------------------------------------------------------------------------- /.soliumrc.json: -------------------------------------------------------------------------------- 1 | { 2 | "extends": "solium:recommended", 3 | "plugins": ["security"], 4 | "rules": { 5 | "quotes": ["error", "double"], 6 | "indentation": ["error", 4], 7 | "linebreak-style": ["error", "unix"], 8 | "error-reason": ["error"] 9 | } 10 | } -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # sol-price-oracles 2 | 3 | A simple factory wrapper around price oracles from the Uniswap team. 4 | 5 | ## Summary example 6 | 7 | A smart contract system wishes to manage price oracles, as described in 8 | [Uniswap Core Concepts - Oracles](https://uniswap.org/docs/v2/core-concepts/oracles/). 9 | 10 | 11 | This factory complex is [TO BE] independently deployed. This adds a 12 | convenience factor for developers wishing to sample Uniswap prices. 13 | 14 | This factory also adds a trust element: [NOTE: NOT YET!] When 15 | deployed, this factory will produce oracles that may be trusted to be 16 | audited, behave in a predictable, known fashion, and have not been 17 | tampered with by potentially unscrupulous actors. 18 | 19 | As such, use of oracles created by this factory removes an element of 20 | trust from downstream projects - some trust is shifted to this system - 21 | thus increasing the trustless factor of downstream projects. 22 | 23 | ## Public operations (APIs) 24 | 25 | ### Anyone: Update price database 26 | 27 | Update on-chain state with price data (if and only if the requisite 28 | time period has elapsed). 29 | 30 | ### Anyone: Query price database 31 | 32 | Given an input ERC20 tokenA address and tokenA amount, return 33 | the amount of tokenB that would be produced by a swap. 34 | 35 | ### Anyone: Create new price oracle 36 | 37 | Create a new price oracle automaton, given the inputs of: 38 | 39 | 1. tokenA: 1st of 2 tokens in a Uniswap pair, whose price shall be monitored. 40 | 2. tokenB: 2nd of 2 tokens in a Uniswap pair, whose price shall be monitored. 41 | 3. period: price sampling time period, in seconds. 42 | 43 | Returns the Ethereum address of the newly created price oracle contract. 44 | 45 | 46 | ## Setup. 47 | 1. Install packages 48 | ``` 49 | npm i -g truffle 50 | npm i 51 | ``` 52 | 2. Update provider url in config/default.json 53 | 3. Set DEPLOYMENT_ACCOUNT_KEY in env 54 | ``` 55 | create a .env file in root 56 | DEPLOYMENT_ACCOUNT_KEY = "my mnemonic phrase" 57 | ``` 58 | 4. Deploy you own contracts if want to do arb- 59 | ``` 60 | truffle migrate --reset --network mainnet/ropsten 61 | ``` 62 | -------------------------------------------------------------------------------- /config/default.json: -------------------------------------------------------------------------------- 1 | { 2 | "provider": "https://eth.connect.bloq.cloud/v1/etc-labs" 3 | } 4 | -------------------------------------------------------------------------------- /contracts/Migrations.sol: -------------------------------------------------------------------------------- 1 | // This file is part of Truffle suite and helps keep track of your deployments 2 | // SPDX-License-Identifier: GPL-3.0 3 | 4 | pragma solidity >=0.4.21 <0.7.0; 5 | 6 | contract Migrations { 7 | address public owner; 8 | uint256 public last_completed_migration; 9 | 10 | constructor() public { 11 | owner = msg.sender; 12 | } 13 | 14 | modifier restricted() { 15 | if (msg.sender == owner) _; 16 | } 17 | 18 | function setCompleted(uint256 completed) public restricted { 19 | last_completed_migration = completed; 20 | } 21 | } 22 | -------------------------------------------------------------------------------- /contracts/OracleSimple.sol: -------------------------------------------------------------------------------- 1 | // SPDX-License-Identifier: GPL-3.0 2 | 3 | pragma solidity ^0.6.6; 4 | 5 | import "@uniswap/v2-core/contracts/interfaces/IUniswapV2Factory.sol"; 6 | import "@uniswap/v2-core/contracts/interfaces/IUniswapV2Pair.sol"; 7 | import "@uniswap/lib/contracts/libraries/FixedPoint.sol"; 8 | 9 | import "./uniswap/UniswapV2OracleLibrary.sol"; 10 | import "./uniswap/UniswapV2Library.sol"; 11 | import "./interfaces/IOracleSimple.sol"; 12 | 13 | // fixed window oracle that recomputes the average price for the entire period once every period 14 | // note that the price average is only guaranteed to be over at least 1 period, but may be over a longer period 15 | contract OracleSimple is IOracleSimple { 16 | using FixedPoint for *; 17 | 18 | uint256 public immutable PERIOD; 19 | IUniswapV2Pair immutable PAIR; 20 | address public immutable token0; 21 | address public immutable token1; 22 | 23 | uint256 public price0CumulativeLast; 24 | uint256 public price1CumulativeLast; 25 | uint32 public blockTimestampLast; 26 | FixedPoint.uq112x112 public price0Average; 27 | FixedPoint.uq112x112 public price1Average; 28 | 29 | constructor( 30 | address factory, 31 | address tokenA, 32 | address tokenB, 33 | uint256 _period 34 | ) public { 35 | PERIOD = _period; 36 | IUniswapV2Pair _pair = IUniswapV2Pair(UniswapV2Library.pairFor(factory, tokenA, tokenB)); 37 | PAIR = _pair; 38 | token0 = _pair.token0(); 39 | token1 = _pair.token1(); 40 | price0CumulativeLast = _pair.price0CumulativeLast(); // fetch the current accumulated price value (1 / 0) 41 | price1CumulativeLast = _pair.price1CumulativeLast(); // fetch the current accumulated price value (0 / 1) 42 | uint112 reserve0; 43 | uint112 reserve1; 44 | (reserve0, reserve1, blockTimestampLast) = _pair.getReserves(); 45 | require(reserve0 != 0 && reserve1 != 0, "OracleSimple: NO_RESERVES"); // ensure that there's liquidity in the pair 46 | } 47 | 48 | function update() external override { 49 | ( 50 | uint256 price0Cumulative, 51 | uint256 price1Cumulative, 52 | uint32 blockTimestamp 53 | ) = UniswapV2OracleLibrary.currentCumulativePrices(address(PAIR)); 54 | uint32 timeElapsed = blockTimestamp - blockTimestampLast; // overflow is desired 55 | 56 | // ensure that at least one full period has passed since the last update 57 | require(timeElapsed >= PERIOD, "OracleSimple: PERIOD_NOT_ELAPSED"); 58 | 59 | // overflow is desired, casting never truncates 60 | // cumulative price is in (uq112x112 price * seconds) units so we simply wrap it after division by time elapsed 61 | price0Average = FixedPoint.uq112x112( 62 | uint224((price0Cumulative - price0CumulativeLast) / timeElapsed) 63 | ); 64 | price1Average = FixedPoint.uq112x112( 65 | uint224((price1Cumulative - price1CumulativeLast) / timeElapsed) 66 | ); 67 | 68 | price0CumulativeLast = price0Cumulative; 69 | price1CumulativeLast = price1Cumulative; 70 | blockTimestampLast = blockTimestamp; 71 | } 72 | 73 | // note this will always return 0 before update has been called successfully for the first time. 74 | function consult(address token, uint256 amountIn) 75 | external 76 | view 77 | override 78 | returns (uint256 amountOut) 79 | { 80 | if (token == token0) { 81 | amountOut = price0Average.mul(amountIn).decode144(); 82 | } else { 83 | require(token == token1, "OracleSimple: INVALID_TOKEN"); 84 | amountOut = price1Average.mul(amountIn).decode144(); 85 | } 86 | } 87 | } 88 | -------------------------------------------------------------------------------- /contracts/OracleSimpleFactory.sol: -------------------------------------------------------------------------------- 1 | // SPDX-License-Identifier: GPL-3.0 2 | 3 | pragma solidity ^0.6.6; 4 | 5 | import "./interfaces/IOracleSimpleFactory.sol"; 6 | import "./OracleSimple.sol"; 7 | 8 | contract OracleSimpleFactory is IOracleSimpleFactory { 9 | address[] private allOracles; 10 | mapping(address => bool) isOurs; 11 | mapping(address => mapping(address => mapping(uint256 => address))) private oracleIdx; 12 | 13 | function ours(address a) external view override returns (bool) { 14 | return isOurs[a]; 15 | } 16 | 17 | function oracleCount() external view override returns (uint256) { 18 | return allOracles.length; 19 | } 20 | 21 | function oracleAt(uint256 idx) external view override returns (address) { 22 | require(idx < allOracles.length, "Index exceeds list length"); 23 | return allOracles[idx]; 24 | } 25 | 26 | function getOracle( 27 | address tokenA, 28 | address tokenB, 29 | uint256 _period 30 | ) external view override returns (address) { 31 | return oracleIdx[tokenA][tokenB][_period]; 32 | } 33 | 34 | function createOracle( 35 | address factory, 36 | address tokenA, 37 | address tokenB, 38 | uint256 _period 39 | ) external override returns (address oracleaddr) { 40 | require( 41 | oracleIdx[tokenA][tokenB][_period] == address(0), 42 | "Oracle already exists for token pair" 43 | ); 44 | 45 | // create new oracle contract 46 | oracleaddr = address(new OracleSimple(factory, tokenA, tokenB, _period)); 47 | 48 | // remember oracle 49 | allOracles.push(oracleaddr); 50 | isOurs[oracleaddr] = true; 51 | oracleIdx[tokenA][tokenB][_period] = oracleaddr; 52 | oracleIdx[tokenB][tokenA][_period] = oracleaddr; 53 | 54 | // log creation 55 | emit OracleCreated(msg.sender, oracleaddr); 56 | } 57 | } 58 | -------------------------------------------------------------------------------- /contracts/interfaces/IOracleSimple.sol: -------------------------------------------------------------------------------- 1 | 2 | // SPDX-License-Identifier: GPL-3.0 3 | 4 | pragma solidity ^0.6.6; 5 | 6 | interface IOracleSimple { 7 | 8 | function update() external; 9 | function consult(address token, uint amountIn) external view returns (uint amountOut); 10 | 11 | } 12 | -------------------------------------------------------------------------------- /contracts/interfaces/IOracleSimpleFactory.sol: -------------------------------------------------------------------------------- 1 | 2 | // SPDX-License-Identifier: GPL-3.0 3 | 4 | pragma solidity ^0.6.6; 5 | 6 | interface IOracleSimpleFactory { 7 | event OracleCreated(address indexed _sender, address indexed _newOracle); 8 | 9 | function ours(address a) external view returns (bool); 10 | function oracleCount() external view returns (uint); 11 | function oracleAt(uint idx) external view returns (address); 12 | function getOracle(address tokenA, address tokenB, uint _period) external view returns (address); 13 | function createOracle(address factory, address tokenA, address tokenB, uint _period) external returns (address oracleaddr); 14 | } 15 | -------------------------------------------------------------------------------- /contracts/uniswap/SafeMath.sol: -------------------------------------------------------------------------------- 1 | 2 | // SPDX-License-Identifier: GPL-3.0 3 | 4 | pragma solidity ^0.6.6; 5 | 6 | // a library for performing overflow-safe math, courtesy of DappHub (https://github.com/dapphub/ds-math) 7 | 8 | library SafeMath { 9 | function add(uint x, uint y) internal pure returns (uint z) { 10 | require((z = x + y) >= x, 'ds-math-add-overflow'); 11 | } 12 | 13 | function sub(uint x, uint y) internal pure returns (uint z) { 14 | require((z = x - y) <= x, 'ds-math-sub-underflow'); 15 | } 16 | 17 | function mul(uint x, uint y) internal pure returns (uint z) { 18 | require(y == 0 || (z = x * y) / y == x, 'ds-math-mul-overflow'); 19 | } 20 | } 21 | -------------------------------------------------------------------------------- /contracts/uniswap/UniswapV2Library.sol: -------------------------------------------------------------------------------- 1 | 2 | // SPDX-License-Identifier: GPL-3.0 3 | 4 | pragma solidity >=0.5.0; 5 | 6 | import '@uniswap/v2-core/contracts/interfaces/IUniswapV2Pair.sol'; 7 | 8 | import "./SafeMath.sol"; 9 | 10 | library UniswapV2Library { 11 | using SafeMath for uint; 12 | 13 | // returns sorted token addresses, used to handle return values from pairs sorted in this order 14 | function sortTokens(address tokenA, address tokenB) internal pure returns (address token0, address token1) { 15 | require(tokenA != tokenB, 'UniswapV2Library: IDENTICAL_ADDRESSES'); 16 | (token0, token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA); 17 | require(token0 != address(0), 'UniswapV2Library: ZERO_ADDRESS'); 18 | } 19 | 20 | // calculates the CREATE2 address for a pair without making any external calls 21 | function pairFor(address factory, address tokenA, address tokenB) internal pure returns (address pair) { 22 | (address token0, address token1) = sortTokens(tokenA, tokenB); 23 | pair = address(uint(keccak256(abi.encodePacked( 24 | hex'ff', 25 | factory, 26 | keccak256(abi.encodePacked(token0, token1)), 27 | hex'96e8ac4277198ff8b6f785478aa9a39f403cb768dd02cbee326c3e7da348845f' // init code hash 28 | )))); 29 | } 30 | 31 | // fetches and sorts the reserves for a pair 32 | function getReserves(address factory, address tokenA, address tokenB) internal view returns (uint reserveA, uint reserveB) { 33 | (address token0,) = sortTokens(tokenA, tokenB); 34 | (uint reserve0, uint reserve1,) = IUniswapV2Pair(pairFor(factory, tokenA, tokenB)).getReserves(); 35 | (reserveA, reserveB) = tokenA == token0 ? (reserve0, reserve1) : (reserve1, reserve0); 36 | } 37 | 38 | // given some amount of an asset and pair reserves, returns an equivalent amount of the other asset 39 | function quote(uint amountA, uint reserveA, uint reserveB) internal pure returns (uint amountB) { 40 | require(amountA > 0, 'UniswapV2Library: INSUFFICIENT_AMOUNT'); 41 | require(reserveA > 0 && reserveB > 0, 'UniswapV2Library: INSUFFICIENT_LIQUIDITY'); 42 | amountB = amountA.mul(reserveB) / reserveA; 43 | } 44 | 45 | // given an input amount of an asset and pair reserves, returns the maximum output amount of the other asset 46 | function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) internal pure returns (uint amountOut) { 47 | require(amountIn > 0, 'UniswapV2Library: INSUFFICIENT_INPUT_AMOUNT'); 48 | require(reserveIn > 0 && reserveOut > 0, 'UniswapV2Library: INSUFFICIENT_LIQUIDITY'); 49 | uint amountInWithFee = amountIn.mul(997); 50 | uint numerator = amountInWithFee.mul(reserveOut); 51 | uint denominator = reserveIn.mul(1000).add(amountInWithFee); 52 | amountOut = numerator / denominator; 53 | } 54 | 55 | // given an output amount of an asset and pair reserves, returns a required input amount of the other asset 56 | function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) internal pure returns (uint amountIn) { 57 | require(amountOut > 0, 'UniswapV2Library: INSUFFICIENT_OUTPUT_AMOUNT'); 58 | require(reserveIn > 0 && reserveOut > 0, 'UniswapV2Library: INSUFFICIENT_LIQUIDITY'); 59 | uint numerator = reserveIn.mul(amountOut).mul(1000); 60 | uint denominator = reserveOut.sub(amountOut).mul(997); 61 | amountIn = (numerator / denominator).add(1); 62 | } 63 | 64 | // performs chained getAmountOut calculations on any number of pairs 65 | function getAmountsOut(address factory, uint amountIn, address[] memory path) internal view returns (uint[] memory amounts) { 66 | require(path.length >= 2, 'UniswapV2Library: INVALID_PATH'); 67 | amounts = new uint[](path.length); 68 | amounts[0] = amountIn; 69 | for (uint i; i < path.length - 1; i++) { 70 | (uint reserveIn, uint reserveOut) = getReserves(factory, path[i], path[i + 1]); 71 | amounts[i + 1] = getAmountOut(amounts[i], reserveIn, reserveOut); 72 | } 73 | } 74 | 75 | // performs chained getAmountIn calculations on any number of pairs 76 | function getAmountsIn(address factory, uint amountOut, address[] memory path) internal view returns (uint[] memory amounts) { 77 | require(path.length >= 2, 'UniswapV2Library: INVALID_PATH'); 78 | amounts = new uint[](path.length); 79 | amounts[amounts.length - 1] = amountOut; 80 | for (uint i = path.length - 1; i > 0; i--) { 81 | (uint reserveIn, uint reserveOut) = getReserves(factory, path[i - 1], path[i]); 82 | amounts[i - 1] = getAmountIn(amounts[i], reserveIn, reserveOut); 83 | } 84 | } 85 | } 86 | -------------------------------------------------------------------------------- /contracts/uniswap/UniswapV2OracleLibrary.sol: -------------------------------------------------------------------------------- 1 | 2 | // SPDX-License-Identifier: GPL-3.0 3 | 4 | pragma solidity >=0.5.0; 5 | 6 | import '@uniswap/v2-core/contracts/interfaces/IUniswapV2Pair.sol'; 7 | import '@uniswap/lib/contracts/libraries/FixedPoint.sol'; 8 | 9 | // library with helper methods for oracles that are concerned with computing average prices 10 | library UniswapV2OracleLibrary { 11 | using FixedPoint for *; 12 | 13 | // helper function that returns the current block timestamp within the range of uint32, i.e. [0, 2**32 - 1] 14 | function currentBlockTimestamp() internal view returns (uint32) { 15 | return uint32(block.timestamp % 2 ** 32); 16 | } 17 | 18 | // produces the cumulative price using counterfactuals to save gas and avoid a call to sync. 19 | function currentCumulativePrices( 20 | address pair 21 | ) internal view returns (uint price0Cumulative, uint price1Cumulative, uint32 blockTimestamp) { 22 | blockTimestamp = currentBlockTimestamp(); 23 | price0Cumulative = IUniswapV2Pair(pair).price0CumulativeLast(); 24 | price1Cumulative = IUniswapV2Pair(pair).price1CumulativeLast(); 25 | 26 | // if time has elapsed since the last update on the pair, mock the accumulated price values 27 | (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast) = IUniswapV2Pair(pair).getReserves(); 28 | if (blockTimestampLast != blockTimestamp) { 29 | // subtraction overflow is desired 30 | uint32 timeElapsed = blockTimestamp - blockTimestampLast; 31 | // addition overflow is desired 32 | // counterfactual 33 | price0Cumulative += uint(FixedPoint.fraction(reserve1, reserve0)._x) * timeElapsed; 34 | // counterfactual 35 | price1Cumulative += uint(FixedPoint.fraction(reserve0, reserve1)._x) * timeElapsed; 36 | } 37 | } 38 | } 39 | -------------------------------------------------------------------------------- /deploy/0.2.0/contracts.json: -------------------------------------------------------------------------------- 1 | { 2 | "version" : "0.2.0", 3 | "networks" : { 4 | "mainnet" : { 5 | "AddressListFactory" : "0xD7CB37DcC79BBd12d7068aEEf73444a8Aa76Ea4f" 6 | }, 7 | "ropsten" : { 8 | "AddressListFactory" : "0xf77959F29a900b5E52557D8E7dE39F77b7D11867" 9 | } 10 | } 11 | } 12 | -------------------------------------------------------------------------------- /migrations/1_initial_migration.js: -------------------------------------------------------------------------------- 1 | const Migrations = artifacts.require("Migrations"); 2 | 3 | module.exports = deployer => { 4 | deployer.deploy(Migrations) 5 | } 6 | -------------------------------------------------------------------------------- /migrations/2_deploy_contracts.js: -------------------------------------------------------------------------------- 1 | let OracleSimpleFactory = artifacts.require("OracleSimpleFactory") 2 | module.exports = async function (deployer, network) { 3 | try { 4 | await deployer.deploy(OracleSimpleFactory) 5 | } catch (e) { 6 | console.log(`Error in migration: ${e.message}`) 7 | } 8 | } 9 | -------------------------------------------------------------------------------- /package.json: -------------------------------------------------------------------------------- 1 | { 2 | "name": "sol-price-oracles", 3 | "version": "0.2.0", 4 | "license": "GPL-3.0", 5 | "description": "sol-price-oracles", 6 | "main": "truffle-config.js", 7 | "directories": { 8 | "test": "test" 9 | }, 10 | "scripts": { 11 | "prettier:solidity": "./node_modules/.bin/prettier --write contracts/*.sol", 12 | "solhint": "./node_modules/.bin/solhint ./contracts/*.sol", 13 | "truffle": "./node_modules/.bin/truffle", 14 | "ganache-cli": "./node_modules/.bin/ganache-cli", 15 | "lint": "./node_modules/.bin/eslint ./test/*", 16 | "lint:fix": "./node_modules/.bin/eslint --fix ./test --ext .js" 17 | }, 18 | "dependencies": { 19 | "config": "^3.3.1", 20 | "@uniswap/v2-core": "^1.0.1", 21 | "@uniswap/v2-periphery": "^1.1.0-beta.0" 22 | }, 23 | "devDependencies": { 24 | "@truffle/hdwallet-provider": "^1.0.36", 25 | "chai": "^4.2.0", 26 | "dotenv": "^8.2.0", 27 | "eslint": "^4.18.1", 28 | "eslint-config-standard": "^11.0.0", 29 | "eslint-plugin-import": "^2.9.0", 30 | "eslint-plugin-mocha-no-only": "^1.1.0", 31 | "eslint-plugin-node": "^5.2.1", 32 | "eslint-plugin-promise": "^3.6.0", 33 | "eslint-plugin-standard": "^3.0.1", 34 | "ganache-cli": "^6.8.2", 35 | "left-pad": "^1.3.0", 36 | "pre-commit": "^1.2.2", 37 | "prettier": "^2.0.5", 38 | "prettier-plugin-solidity": "^1.0.0-alpha.54", 39 | "solhint": "^2.3.1", 40 | "solhint-plugin-prettier": "0.0.4", 41 | "truffle": "^5.1.32" 42 | } 43 | } 44 | -------------------------------------------------------------------------------- /truffle-config.js: -------------------------------------------------------------------------------- 1 | // const path = require("path"); 2 | const HDWalletProvider = require("@truffle/hdwallet-provider") 3 | require("dotenv").config() 4 | var config = require('config') 5 | 6 | module.exports = { 7 | // See to customize your Truffle configuration! 8 | // contracts_build_directory: path.join(__dirname, "client/src/contracts"), 9 | networks: { 10 | development: { 11 | host: "127.0.0.1", 12 | port: 8545, 13 | // gas: 20000000, 14 | network_id: "*", 15 | skipDryRun: true 16 | }, 17 | ropsten: { 18 | provider: new HDWalletProvider(process.env.DEPLOYMENT_ACCOUNT_KEY, "https://ropsten.infura.io/v3/" + process.env.INFURA_API_KEY), 19 | network_id: 3, 20 | gas: 7000000, 21 | gasPrice: 5000000000, // 5 Gwei 22 | skipDryRun: true 23 | }, 24 | kovan: { 25 | provider: new HDWalletProvider(process.env.DEPLOYMENT_ACCOUNT_KEY, "https://kovan.infura.io/v3/" + process.env.INFURA_API_KEY), 26 | network_id: 42, 27 | gas: 5000000, 28 | gasPrice: 5000000000, // 5 Gwei 29 | skipDryRun: true 30 | }, 31 | mainnet: { 32 | provider: new HDWalletProvider(process.env.DEPLOYMENT_ACCOUNT_KEY, config.provider), 33 | network_id: 1, 34 | gas: 6000000, 35 | gasPrice: 42000000000 36 | } 37 | }, 38 | compilers: { 39 | solc: { 40 | version: "0.6.12", 41 | }, 42 | }, 43 | } 44 | --------------------------------------------------------------------------------