UniswapPriceOracle

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DeFiPIE

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UniswapPriceOracle

Introduction
DeFiPIE protocol uses UniswapPriceOracle to get time-weighted average prices from Uniswap v2 or other DEX (clones Uniswap v2).
Every time the user interacts with a pool, the protocol gets the current price from Uniswap and averages it with the previously stored price, thereby achieving the Time-weighted average price effect, which in turn protects the protocol from price manipulation through flash loans.
Update price by pToken
Updating the price of an asset by the pToken address.
UniswapPriceOracle
function updateUnderlyingPrice(address pToken) public override returns (uint)
pToken: pToken address.
RETURN: 0 on success, otherwise an Error code.
Solidity
UniswapPriceOracle oracle = UniswapPriceOracle(0xABCD...);
PErc20 pToken = PErc20(0x3FDB...);
oracle.updateUnderlyingPrice(address(pToken));
Web3 1.0
const oracle = UniswapPriceOracle.at(0xABCD...);
const pToken = PErc20.at(0x3FDB...);
oracle.methods.updateUnderlyingPrice(pToken).send({from: ...});
Update price by an asset.
Updating the price of an asset by the asset address.
UniswapPriceOracle
function update(address asset) public returns (uint)
asset: asset address.
RETURN: 0 on success, otherwise an Error code.
Solidity
UniswapPriceOracle oracle = UniswapPriceOracle(0xABCD...);
Erc20 token = Erc20(0x3FDB...);
oracle.update(address(token));
Web3 1.0
const oracle = UniswapPriceOracle.at(0xABCD...);
const token = Erc20.at(0x3FDB...);
oracle.methods.update(token ).send({from: ...});
Get asset price in ETH
Get an average asset price in ETH with 18 decimals of precision.
UniswapPriceOracle
function getCourseInETH(address asset) public view returns (uint)
asset: asset address.
RETURN: asset price.
Solidity
UniswapPriceOracle oracle = UniswapPriceOracle(0xABCD...);
Erc20 token = Erc20(0x3FDB...);
uint price = oracle.getCourseInETH(address(token));
Web3 1.0
const oracle = UniswapPriceOracle.at(0xABCD...);
const token = Erc20.at(0x3FDB...);
const price = oracle.methods.getCourseInETH(token).call();
Get asset price in USD
Get an average asset price in USD with 18 decimals of precision.
UniswapPriceOracle
function getPriceInUSD(address asset) public view virtual returns (uint)
asset: asset address.
RETURN: asset price.
Solidity
UniswapPriceOracle oracle = UniswapPriceOracle(0xABCD...);
Erc20 token = Erc20(0x3FDB...);
uint price = oracle.getPriceInUSD(address(token));
Web3 1.0
const oracle = UniswapPriceOracle.at(0xABCD...);
const token = Erc20.at(0x3FDB...);
const price = oracle.methods.getPriceInUSD(token).call();

PTokenFactory

API

Last modified 1yr ago

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Outline

Introduction

Update price by pToken

Update price by an asset.

Get asset price in ETH

Get asset price in USD