Pricing LP tokens

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Recently Added

This feature was added in the latest release

In partnership with 🌹 Nostra, we recently launched new pricers for liquidity pools.

Supported Pools

Name	Address	Decimals	Mainnet	Type	Risk
USDC/USDT	0x00c318445d5a5096e2ad086452d5c97f65a9d28cafe343345e0fa70da0841295	18	✅	Degen	L
STRK/ETH	0x01a2de9f2895ac4e6cb80c11ecc07ce8062a4ae883f64cb2b1dc6724b85e897d	18	✅	Degen	L
STRK/USDC	0x042543c7d220465bd3f8f42314b51f4f3a61d58de3770523b281da61dbf27c8a	18	✅	Degen	L
ETH/USDC	0x05e03162008d76cf645fe53c6c13a7a5fce745e8991c6ffe94400d60e44c210a	18	✅	Degen	L
WBTC/ETH	0x01583919ffd78e87fa28fdf6b6a805fe3ddf52f754a63721dcd4c258211129a6	18	✅	Degen	L

Pricing

After registering a liquidity pool, the system automatically monitors:

• Total supply of LP tokens
• Token reserves for both assets in the pool

These values are periodically queried from the pool contract. When you call the get_data_entries function with the pool address, the system:

1. Calculates the median values over the last 30 minutes for both total supply and reserves
2. Computes the LP token price using these median values. The output price is multiplied by 10**pool_decimals, where pool_decimals is the number of decimals defined in the Pool. The formula used to compute the LP price is the following:

Integration

Below is an simple code snippet which details the process to retrieve a LP price for a given registered pool contract.

use pragma_lib::abi::{IPragmaABIDispatcher, IPragmaABIDispatcherTrait};
use pragma_lib::types::{DataType, PossibleEntries};
use starknet::ContractAddress;
use starknet::contract_address::contract_address_const;

// felt252 conversion of a given pool address. The pool must be registered first.
const POOL_ADDRESS: felt252 = 740078551671935829004187031909236611599308432587586965379905724271919270269; 

fn get_lp_price(oracle_address: ContractAddress, asset: DataType) -> u256 {
    let oracle_dispatcher = IPragmaABIDispatcher{contract_address : oracle_address};
    let output: PossibleEntries = oracle_dispatcher.get_data_entries(asset).get(0);
    let entry: GenericEntry = match output {
      PossibleEntries::GenericEntry(e) => e,
      _ => panic_with_felt252(0) // should never happen
    };
    return entry.value;
}

// USAGE
let oracle_address: ContractAddress = contract_address_const::<0x06df335982dddce41008e4c03f2546fa27276567b5274c7d0c1262f3c2b5d167>();
// The price returned is multiplied by 10**pool_decimals
let price_in_dollars: u256 = get_lp_price(oracle_address, DataType::GenericEntry(POOL_ADDRESS));