IPriceFeed

Interface Description

License: MIT

interface IPriceFeed
This is the price feed contract which is used to fetch the spot prices from the UniswapV2 protocol. There also is a pathfinder built into the contract to find the optimal* path between the pairs

Enums info

PoolInterfaceType

enum PoolInterfaceType {
UniswapV2Interface,
UniswapV3Interface
}
The enum that holds information about the router type
Parameters:
Name
Description
UniswapV2Interface
the Uniswap V2 router V2 type
UniswapV3Interface
the Uniswap V3 quouter V2 type

Structs info

PoolType

struct PoolType {
IPriceFeed.PoolInterfaceType poolType;
address router;
uint24 fee;
}
A struct describing single swapping pool parameters
Parameters:
Name
Type
Description
poolType
enum IPriceFeed.PoolInterfaceType
the interface type of the router
router
address
the address of the router or quoter
fee
uint24
the pool fee (in case of V3 pools)

SwapPath

struct SwapPath {
address[] path;
uint8[] poolTypes;
}
A struct describing a swap path
Parameters:
Name
Type
Description
path
address[]
the tokens swapped alongside the path
poolTypes
uint8[]
the v2/v3 pool types alongside the path

Functions info

addPathTokens (0xf973dc01)

function addPathTokens(address[] calldata pathTokens) external
This function sets path tokens that will be used in the pathfinder
Parameters:
Name
Type
Description
pathTokens
address[]
the array of tokens to be added into the path finder

removePathTokens (0x5de49e39)

function removePathTokens(address[] calldata pathTokens) external
This function removes path tokens from the pathfinder
Parameters:
Name
Type
Description
pathTokens
address[]
the array of tokens to be removed from the pathfinder

setPoolTypes (0x3cbc6757)

function setPoolTypes(IPriceFeed.PoolType[] calldata poolTypes) external
This function sets pool types that will be used in the pathfinder
Parameters:
Name
Type
Description
poolTypes
struct IPriceFeed.PoolType[]
the array of pool types

getPriceOut (0x70e48e96)

function getPriceOut(
address inToken,
address outToken,
uint256 amountIn
) external returns (uint256 amountOut, IPriceFeed.SwapPath memory path)
Shares the same functionality as "getExtendedPriceOut" function with an empty optionalPath. It accepts and returns amounts with 18 decimals regardless of the inToken and outToken decimals
Parameters:
Name
Type
Description
inToken
address
the token to exchange from
outToken
address
the token to exchange to
amountIn
uint256
the amount of inToken to be exchanged (with 18 decimals)
Return values:
Name
Type
Description
amountOut
uint256
the received amount of outToken after the swap (with 18 decimals)
path
struct IPriceFeed.SwapPath
the tokens and pools path that will be used during the swap

getPriceIn (0xd48c3202)

function getPriceIn(
address inToken,
address outToken,
uint256 amountOut
) external returns (uint256 amountIn, IPriceFeed.SwapPath memory path)
Shares the same functionality as "getExtendedPriceIn" function with with an empty optionalPath. It accepts and returns amounts with 18 decimals regardless of the inToken and outToken decimals
Parameters:
Name
Type
Description
inToken
address
the token to exchange from
outToken
address
the token to exchange to
amountOut
uint256
the amount of outToken to be received (with 18 decimals)
Return values:
Name
Type
Description
amountIn
uint256
required amount of inToken to execute the swap (with 18 decimals)
path
struct IPriceFeed.SwapPath
the tokens path that will be used during the swap

getNormalizedPriceOutUSD (0xb4c05b8c)

function getNormalizedPriceOutUSD(
address inToken,
uint256 amountIn
) external returns (uint256 amountOut, IPriceFeed.SwapPath memory path)
The same as "getPriceOut" with "outToken" being native USD token
Parameters:
Name
Type
Description
inToken
address
the token to be exchanged from
amountIn
uint256
the amount of inToken to exchange (with 18 decimals)
Return values:
Name
Type
Description
amountOut
uint256
the received amount of native USD tokens after the swap (with 18 decimals)
path
struct IPriceFeed.SwapPath
the tokens path that will be used during the swap

getNormalizedPriceInUSD (0x715c6baf)

function getNormalizedPriceInUSD(
address inToken,
uint256 amountOut
) external returns (uint256 amountIn, IPriceFeed.SwapPath memory path)
The same as "getPriceIn" with "outToken" being USD token
Parameters:
Name
Type
Description
inToken
address
the token to get the price of
amountOut
uint256
the amount of USD to be received (with 18 decimals)
Return values:
Name
Type
Description
amountIn
uint256
the required amount of inToken to execute the swap (with 18 decimals)
path
struct IPriceFeed.SwapPath
the tokens path that will be used during the swap

getNormalizedPriceOutDEXE (0x291bcd52)

function getNormalizedPriceOutDEXE(
address inToken,
uint256 amountIn
) external returns (uint256 amountOut, IPriceFeed.SwapPath memory path)
The same as "getPriceOut" with "outToken" being DEXE token
Parameters:
Name
Type
Description
inToken
address
the token to be exchanged from
amountIn
uint256
the amount of inToken to exchange (with 18 decimals)
Return values:
Name
Type
Description
amountOut
uint256
the received amount of DEXE tokens after the swap (with 18 decimals)
path
struct IPriceFeed.SwapPath
the tokens path that will be used during the swap

getNormalizedPriceInDEXE (0x9180f690)

function getNormalizedPriceInDEXE(
address inToken,
uint256 amountOut
) external returns (uint256 amountIn, IPriceFeed.SwapPath memory path)
The same as "getPriceIn" with "outToken" being DEXE token
Parameters:
Name
Type
Description
inToken
address
the token to get the price of
amountOut
uint256
the amount of DEXE to be received (with 18 decimals)
Return values:
Name
Type
Description
amountIn
uint256
the required amount of inToken to execute the swap (with 18 decimals)
path
struct IPriceFeed.SwapPath
the tokens path that will be used during the swap

totalPathTokens (0x9f2f8ce1)

function totalPathTokens() external view returns (uint256)
The function that returns the total number of path tokens (tokens used in the pathfinder)
Return values:
Name
Type
Description
[0]
uint256
the number of path tokens

getPathTokens (0x547c176b)

function getPathTokens() external view returns (address[] memory)
The function to get the list of path tokens
Return values:
Name
Type
Description
[0]
address[]
the list of path tokens

getPoolTypesLength (0x14980a8d)

function getPoolTypesLength() external view returns (uint256)
The function that returns the total number of pool types used in the pathfinder
Return values:
Name
Type
Description
[0]
uint256
the number of pool types

getPoolTypes (0x2fbc3b93)

function getPoolTypes() external view returns (IPriceFeed.PoolType[] memory)
The function to return the list of pool types used in the pathfinder
Return values:
Name
Type
Description
[0]
struct IPriceFeed.PoolType[]
the list of pool types

isSupportedPathToken (0xa5b0de41)

function isSupportedPathToken(address token) external view returns (bool)
This function checks if the provided token is used by the pathfinder
Parameters:
Name
Type
Description
token
address
the token to be checked
Return values:
Name
Type
Description
[0]
bool
true if the token is used by the pathfinder, false otherwise

getExtendedPriceOut (0x054889da)

function getExtendedPriceOut(
address inToken,
address outToken,
uint256 amountIn,
IPriceFeed.SwapPath memory optionalPath
) external returns (uint256 amountOut, IPriceFeed.SwapPath memory path)
This function tries to find the optimal exchange rate (the price) between "inToken" and "outToken" using custom pathfinder and optional specified path. The optimality is reached when the amount of outTokens is maximal
Parameters:
Name
Type
Description
inToken
address
the token to exchange from
outToken
address
the received token
amountIn
uint256
the amount of inToken to be exchanged (in inToken decimals)
optionalPath
struct IPriceFeed.SwapPath
the optional path between inToken and outToken that will be used in the pathfinder
Return values:
Name
Type
Description
amountOut
uint256
amount of outToken after the swap (in outToken decimals)
path
struct IPriceFeed.SwapPath
the tokens path that will be used during the swap

getExtendedPriceIn (0x76707b6b)

function getExtendedPriceIn(
address inToken,
address outToken,
uint256 amountOut,
IPriceFeed.SwapPath memory optionalPath
) external returns (uint256 amountIn, IPriceFeed.SwapPath memory path)
This function tries to find the optimal exchange rate (the price) between "inToken" and "outToken" using custom pathfinder and optional specified path. The optimality is reached when the amount of inTokens is minimal
Parameters:
Name
Type
Description
inToken
address
the token to exchange from
outToken
address
the received token
amountOut
uint256
the amount of outToken to be received (in inToken decimals)
optionalPath
struct IPriceFeed.SwapPath
the optional path between inToken and outToken that will be used in the pathfinder
Return values:
Name
Type
Description
amountIn
uint256
amount of inToken to execute a swap (in outToken decimals)
path
struct IPriceFeed.SwapPath
the tokens path that will be used during the swap

getNormalizedExtendedPriceOut (0x62d78340)

function getNormalizedExtendedPriceOut(
address inToken,
address outToken,
uint256 amountIn,
IPriceFeed.SwapPath memory optionalPath
) external returns (uint256 amountOut, IPriceFeed.SwapPath memory path)
Shares the same functionality as "getExtendedPriceOut" function. It accepts and returns amounts with 18 decimals regardless of the inToken and outToken decimals
Parameters:
Name
Type
Description
inToken
address
the token to exchange from
outToken
address
the token to exchange to
amountIn
uint256
the amount of inToken to be exchanged (with 18 decimals)
optionalPath
struct IPriceFeed.SwapPath
the optional path between inToken and outToken that will be used in the pathfinder
Return values:
Name
Type
Description
amountOut
uint256
the received amount of outToken after the swap (with 18 decimals)
path
struct IPriceFeed.SwapPath
the tokens path that will be used during the swap

getNormalizedExtendedPriceIn (0x9ebb6389)

function getNormalizedExtendedPriceIn(
address inToken,
address outToken,
uint256 amountOut,
IPriceFeed.SwapPath memory optionalPath
) external returns (uint256 amountIn, IPriceFeed.SwapPath memory path)
Shares the same functionality as "getExtendedPriceIn" function. It accepts and returns amounts with 18 decimals regardless of the inToken and outToken decimals
Parameters:
Name
Type
Description
inToken
address
the token to exchange from
outToken
address
the token to exchange to
amountOut
uint256
the amount of outToken to be received (with 18 decimals)
optionalPath
struct IPriceFeed.SwapPath
the optional path between inToken and outToken that will be used in the pathfinder
Return values:
Name
Type
Description
amountIn
uint256
the required amount of inToken to execute the swap (with 18 decimals)
path
struct IPriceFeed.SwapPath
the tokens path that will be used during the swap

getNormalizedPriceOut (0xb6ccb44d)

function getNormalizedPriceOut(
address inToken,
address outToken,
uint256 amountIn
) external returns (uint256 amountOut, IPriceFeed.SwapPath memory path)
Shares the same functionality as "getExtendedPriceOut" function with an empty optionalPath. It accepts and returns amounts with 18 decimals regardless of the inToken and outToken decimals
Parameters:
Name
Type
Description
inToken
address
the token to exchange from
outToken
address
the token to exchange to
amountIn
uint256
the amount of inToken to be exchanged (with 18 decimals)
Return values:
Name
Type
Description
amountOut
uint256
the received amount of outToken after the swap (with 18 decimals)
path
struct IPriceFeed.SwapPath
the tokens path that will be used during the swap

getNormalizedPriceIn (0x2bcbc598)

function getNormalizedPriceIn(
address inToken,
address outToken,
uint256 amountOut
) external returns (uint256 amountIn, IPriceFeed.SwapPath memory path)
Shares the same functionality as "getExtendedPriceIn" function with an empty optionalPath. It accepts and returns amounts with 18 decimals regardless of the inToken and outToken decimals
Parameters:
Name
Type
Description
inToken
address
the token to exchange from
outToken
address
the token to exchange to
amountOut
uint256
the amount of outToken to be received (with 18 decimals)
Return values:
Name
Type
Description
amountIn
uint256
required amount of inToken to execute the swap (with 18 decimals)
path
struct IPriceFeed.SwapPath
the tokens path that will be used during the swap