CustomERC20Pricing

Git Source

Inherits: Ownable, IApplicationEvents, IProtocolERC20Pricing, AppAdministratorOnly, IZeroAddressError

Author: @ShaneDuncan602, @oscarsernarosero, @TJ-Everett

This contract is an example of how one could implement a custom pricing solution. It uses a Chainlink Price Feed to get the token price

State Variables

aave

address private aave = 0xD6DF932A45C0f255f85145f286eA0b292B21C90B;

aaveFeed

address private aaveFeed = 0x72484B12719E23115761D5DA1646945632979bB6;

algo

address private algo = 0xA8aa9dE3530ab3199a73C9F2115F6d37955546d7;

algoFeed

address private algoFeed = 0x03Bc6D9EFed65708D35fDaEfb25E87631a0a3437;

doge

address private doge = 0xD9d32b18Fd437F5de774e926CFFdad8F514EeED0;

dogeFeed

address private dogeFeed = 0xbaf9327b6564454F4a3364C33eFeEf032b4b4444;

appManagerAddress

address private immutable appManagerAddress;

Functions

constructor

constructor(address _appManagerAddress);

getTokenPrice

that the price is for the whole token and not of its atomic unit. This means that if an ERC20 with 18 decimals has a price of 2 dollars, then its atomic unit would be 2/10^18 USD. 999_999_999_999_999_999 = 0xDE0B6B3A763FFFF, 1_000_000_000_000_000_000 = DE0B6B3A7640000

Gets the price of a Token. It will return the Token’s specific price. This function is left here to preserve the function signature

function getTokenPrice(address tokenContract) external view returns (uint256);

Parameters

Name	Type	Description
tokenContract	address	is the address of the Token contract

Returns

Name	Type	Description
<none>	uint256	price of the Token in weis of dollars. 10^18 => $ 1.00 USD

getChainlinkDOGEtoUSDFeedPrice

Gets the Chainlink price feed for DOGE in USD. This is an example that works for any decimal denomination.

function getChainlinkDOGEtoUSDFeedPrice() public view returns (uint256);

Returns

Name	Type	Description
<none>	uint256	price The current price in USD for this token according to Chainlink aggregation

getChainlinkAAVEtoUSDFeedPrice

This price feed is actually 8 decimals so it must be converted to 18.

Gets the Chainlink price feed for AAVE in USD.

function getChainlinkAAVEtoUSDFeedPrice() public view returns (uint256);

Returns

Name	Type	Description
<none>	uint256	price The current price in USD for this token according to Chainlink aggregation

getChainlinkALGOtoUSDFeedPrice

This price feed is actually 8 decimals so it must be converted to 18.

Gets the Chainlink price feed for AAVE in USD.

function getChainlinkALGOtoUSDFeedPrice() public view returns (uint256);

Returns

Name	Type	Description
<none>	uint256	price The current price in USD for this token according to Chainlink aggregation

setAAVEAddress

This function allows appAdminstrators to set the token address

function setAAVEAddress(address _address) external appAdministratorOnly(appManagerAddress);

setAAVEFeedAddress

This function allows appAdminstrators to set the Chainlink price feed address

function setAAVEFeedAddress(address _address) external appAdministratorOnly(appManagerAddress);

setALGOAddress

This function allows appAdminstrators to set the token address

function setALGOAddress(address _address) external appAdministratorOnly(appManagerAddress);

setALGOFeedAddress

This function allows appAdminstrators to set the Chainlink price feed address

function setALGOFeedAddress(address _address) external appAdministratorOnly(appManagerAddress);

setDOGEAddress

This function allows appAdminstrators to set the token address

function setDOGEAddress(address _address) external appAdministratorOnly(appManagerAddress);

setDOGEFeedAddress

This function allows appAdminstrators to set the Chainlink price feed address

function setDOGEFeedAddress(address _address) external appAdministratorOnly(appManagerAddress);

Errors

NoPriceFeed

error NoPriceFeed(address tokenAddress);