Texte vergleichen

Finden Sie den Unterschied zwischen zwei Textdateien

Real-time diff

Unified diff

Collapse lines

Highlight change

Syntax highlighting

Onlinewerkzeuge

Diffchecker Desktop The most secure way to run Diffchecker. Get the Diffchecker Desktop app: your diffs never leave your computer!Get Desktop

Comparing sensitive data, confidential files or internal emails?

Most legal and privacy policies prohibit uploading sensitive data online. Diffchecker Desktop ensures your confidential information never leaves your computer. Work offline and compare documents securely.

Download Diffchecker Desktop Learn more

TombBasedOracles

Created 3 years agoDiff never expires

25 removals

105 lines

20 additions

104 lines

// SPDX-License-Identifier: MIT

pragma solidity 0.6.12;

pragma solidity ^0.8.0;

import "@openzeppelin/contracts/math/SafeMath.sol";

import "@openzeppelin/contracts/utils/math/SafeMath.sol";

import "./lib/Babylonian.sol";

import "./lib/FixedPoint.sol";

import "./lib/UniswapV2OracleLibrary.sol";

import "./utils/Epoch.sol";

import "./interfaces/IUniswapV2Pair.sol";

______ __ _______

__________ .___ ___________.__

/_ __/___ ____ ___ / /_ / ____(_)___ ____ _____ ________

\______ \_____ ______ ____ __| _/ \_ _____/|__| ____ _____ ____ ____ ____

/ / / __ \/ __ `__ \/ __ \ / /_ / / __ \/ __ `/ __ \/ ___/ _ \

| | _/\__ \ / ___/_/ __ \ / __ | | __) | | / \ \__ \ / \ _/ ___\_/ __ \

/ / / /_/ / / / / / / /_/ / / __/ / / / / / /_/ / / / / /__/ __/

| | \ / __ \_ \___ \ \ ___/ / /_/ | | \ | || | \ / __ \_| | \\ \___\ ___/

/_/ \____/_/ /_/ /_/_.___/ /_/ /_/_/ /_/\__,_/_/ /_/\___/\___/

|______ /(____ //____ > \___ >\____ | \___ / |__||___| /(____ /|___| / \___ >\___ >

\/ \/ \/ \/ \/ \/ \/ \/ \/ \/ \/

http://tomb.finance

// fixed window oracle that recomputes the average price for the entire period once every period

// note that the price average is only guaranteed to be over at least 1 period, but may be over a longer period

contract Oracle is Epoch {

using FixedPoint for *;

using SafeMath for uint256;

/* ========== STATE VARIABLES ========== */

// uniswap

address public token0;

address public token1;

IUniswapV2Pair public pair;

// oracle

uint32 public blockTimestampLast;

uint256 public price0CumulativeLast;

uint256 public price1CumulativeLast;

FixedPoint.uq112x112 public price0Average;

FixedPoint.uq112x112 public price1Average;

/* ========== CONSTRUCTOR ========== */

constructor(

IUniswapV2Pair _pair,

uint256 _period,

uint256 _startTime

) public Epoch(_period, _startTime, 0) {

) Epoch(_period, _startTime, 0) {

pair = _pair;

token0 = pair.token0();

token1 = pair.token1();

price0CumulativeLast = pair.price0CumulativeLast(); // fetch the current accumulated price value (1 / 0)

price1CumulativeLast = pair.price1CumulativeLast(); // fetch the current accumulated price value (0 / 1)

uint112 reserve0;

uint112 reserve1;

(reserve0, reserve1, blockTimestampLast) = pair.getReserves();

require(reserve0 != 0 && reserve1 != 0, "Oracle: NO_RESERVES"); // ensure that there's liquidity in the pair

}

/* ========== MUTABLE FUNCTIONS ========== */

/** @dev Updates 1-day EMA price from Uniswap. */

function update() external checkEpoch {

(uint256 price0Cumulative, uint256 price1Cumulative, uint32 blockTimestamp) = UniswapV2OracleLibrary.currentCumulativePrices(address(pair));

uint32 timeElapsed = blockTimestamp - blockTimestampLast; // overflow is desired

if (timeElapsed == 0) {

// prevent divided by zero

return;

}

// overflow is desired, casting never truncates

// cumulative price is in (uq112x112 price * seconds) units so we simply wrap it after division by time elapsed

price0Average = FixedPoint.uq112x112(uint224((price0Cumulative - price0CumulativeLast) / timeElapsed));

price1Average = FixedPoint.uq112x112(uint224((price1Cumulative - price1CumulativeLast) / timeElapsed));

price0CumulativeLast = price0Cumulative;

price1CumulativeLast = price1Cumulative;

blockTimestampLast = blockTimestamp;

emit Updated(price0Cumulative, price1Cumulative);

}

// note this will always return 0 before update has been called successfully for the first time.

function consult(address _token, uint256 _amountIn) external view returns (uint144 amountOut) {

if (_token == token0) {

amountOut = price0Average.mul(_amountIn).decode144();

} else {

require(_token == token1, "Oracle: INVALID_TOKEN");

amountOut = price1Average.mul(_amountIn).decode144();

}

function twap(address _token, uint256 _amountIn) external view returns (uint144 _amountOut) {

(uint256 price0Cumulative, uint256 price1Cumulative, uint32 blockTimestamp) = UniswapV2OracleLibrary.currentCumulativePrices(address(pair));

uint32 timeElapsed = blockTimestamp - blockTimestampLast; // overflow is desired

if (_token == token0) {

_amountOut = FixedPoint.uq112x112(uint224((price0Cumulative - price0CumulativeLast) / timeElapsed)).mul(_amountIn).decode144();

} else if (_token == token1) {

_amountOut = FixedPoint.uq112x112(uint224((price1Cumulative - price1CumulativeLast) / timeElapsed)).mul(_amountIn).decode144();

}

event Updated(uint256 price0CumulativeLast, uint256 price1CumulativeLast);

}

Gespeicherten Diffs

Original text

Open file

// SPDX-License-Identifier: MIT

pragma solidity 0.6.12;

import "@openzeppelin/contracts/math/SafeMath.sol";

import "./lib/Babylonian.sol";
import "./lib/FixedPoint.sol";
import "./lib/UniswapV2OracleLibrary.sol";
import "./utils/Epoch.sol";
import "./interfaces/IUniswapV2Pair.sol";

/*
  ______                __       _______
 /_  __/___  ____ ___  / /_     / ____(_)___  ____ _____  ________
  / / / __ \/ __ `__ \/ __ \   / /_  / / __ \/ __ `/ __ \/ ___/ _ \
 / / / /_/ / / / / / / /_/ /  / __/ / / / / / /_/ / / / / /__/  __/
/_/  \____/_/ /_/ /_/_.___/  /_/   /_/_/ /_/\__,_/_/ /_/\___/\___/

http://tomb.finance
*/
// fixed window oracle that recomputes the average price for the entire period once every period
// note that the price average is only guaranteed to be over at least 1 period, but may be over a longer period
contract Oracle is Epoch {
    using FixedPoint for *;
    using SafeMath for uint256;

/* ========== STATE VARIABLES ========== */

// uniswap
    address public token0;
    address public token1;
    IUniswapV2Pair public pair;

// oracle
    uint32 public blockTimestampLast;
    uint256 public price0CumulativeLast;
    uint256 public price1CumulativeLast;
    FixedPoint.uq112x112 public price0Average;
    FixedPoint.uq112x112 public price1Average;

/* ========== CONSTRUCTOR ========== */

constructor(
        IUniswapV2Pair _pair,
        uint256 _period,
        uint256 _startTime
    ) public Epoch(_period, _startTime, 0) {
        pair = _pair;
        token0 = pair.token0();
        token1 = pair.token1();
        price0CumulativeLast = pair.price0CumulativeLast(); // fetch the current accumulated price value (1 / 0)
        price1CumulativeLast = pair.price1CumulativeLast(); // fetch the current accumulated price value (0 / 1)
        uint112 reserve0;
        uint112 reserve1;
        (reserve0, reserve1, blockTimestampLast) = pair.getReserves();
        require(reserve0 != 0 && reserve1 != 0, "Oracle: NO_RESERVES"); // ensure that there's liquidity in the pair
    }

/* ========== MUTABLE FUNCTIONS ========== */

/** @dev Updates 1-day EMA price from Uniswap.  */
    function update() external checkEpoch {
        (uint256 price0Cumulative, uint256 price1Cumulative, uint32 blockTimestamp) = UniswapV2OracleLibrary.currentCumulativePrices(address(pair));
        uint32 timeElapsed = blockTimestamp - blockTimestampLast; // overflow is desired

if (timeElapsed == 0) {
            // prevent divided by zero
            return;
        }

// overflow is desired, casting never truncates
        // cumulative price is in (uq112x112 price * seconds) units so we simply wrap it after division by time elapsed
        price0Average = FixedPoint.uq112x112(uint224((price0Cumulative - price0CumulativeLast) / timeElapsed));
        price1Average = FixedPoint.uq112x112(uint224((price1Cumulative - price1CumulativeLast) / timeElapsed));

price0CumulativeLast = price0Cumulative;
        price1CumulativeLast = price1Cumulative;
        blockTimestampLast = blockTimestamp;

emit Updated(price0Cumulative, price1Cumulative);
    }

// note this will always return 0 before update has been called successfully for the first time.
    function consult(address _token, uint256 _amountIn) external view returns (uint144 amountOut) {
        if (_token == token0) {
            amountOut = price0Average.mul(_amountIn).decode144();
        } else {
            require(_token == token1, "Oracle: INVALID_TOKEN");
            amountOut = price1Average.mul(_amountIn).decode144();
        }
    }

event Updated(uint256 price0CumulativeLast, uint256 price1CumulativeLast);
}

Geänderter text

Open file

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "@openzeppelin/contracts/utils/math/SafeMath.sol";

import "./lib/Babylonian.sol";
import "./lib/FixedPoint.sol";
import "./lib/UniswapV2OracleLibrary.sol";
import "./utils/Epoch.sol";
import "./interfaces/IUniswapV2Pair.sol";

/*
__________                             .___   ___________.__
\______   \_____     ______  ____    __| _/   \_   _____/|__|  ____  _____     ____    ____   ____
 |    |  _/\__  \   /  ___/_/ __ \  / __ |     |    __)  |  | /    \ \__  \   /    \ _/ ___\_/ __ \
 |    |   \ / __ \_ \___ \ \  ___/ / /_/ |     |     \   |  ||   |  \ / __ \_|   |  \\  \___\  ___/
 |______  /(____  //____  > \___  >\____ |     \___  /   |__||___|  /(____  /|___|  / \___  >\___  >
        \/      \/      \/      \/      \/         \/             \/      \/      \/      \/     \/
*/
// fixed window oracle that recomputes the average price for the entire period once every period
// note that the price average is only guaranteed to be over at least 1 period, but may be over a longer period
contract Oracle is Epoch {
    using FixedPoint for *;
    using SafeMath for uint256;

/* ========== STATE VARIABLES ========== */

// uniswap
    address public token0;
    address public token1;
    IUniswapV2Pair public pair;

/* ========== CONSTRUCTOR ========== */

constructor(
        IUniswapV2Pair _pair,
        uint256 _period,
        uint256 _startTime
    ) Epoch(_period, _startTime, 0) {
        pair = _pair;
        token0 = pair.token0();
        token1 = pair.token1();
        price0CumulativeLast = pair.price0CumulativeLast(); // fetch the current accumulated price value (1 / 0)
        price1CumulativeLast = pair.price1CumulativeLast(); // fetch the current accumulated price value (0 / 1)
        uint112 reserve0;
        uint112 reserve1;
        (reserve0, reserve1, blockTimestampLast) = pair.getReserves();
        require(reserve0 != 0 && reserve1 != 0, "Oracle: NO_RESERVES"); // ensure that there's liquidity in the pair
    }

/* ========== MUTABLE FUNCTIONS ========== */

if (timeElapsed == 0) {
            // prevent divided by zero
            return;
        }

price0CumulativeLast = price0Cumulative;
        price1CumulativeLast = price1Cumulative;
        blockTimestampLast = blockTimestamp;

emit Updated(price0Cumulative, price1Cumulative);
    }

event Updated(uint256 price0CumulativeLast, uint256 price1CumulativeLast);
}