FTSO Proposal: Add cUSDX/USD and yUSDX/USD Price Feeds

[USDX23]

Feed Name

cUSDX/USDX & yUSDX/USDX

Asset Class

Custom Feeds

Justification

We respectfully request the addition of the following new price feeds to the Flare Time Series Oracle (FTSO):

1. yUSDX / USD
2. cUSDX / USD

yUSDX is the LP token received by users depositing USD stablecoins (USDX, USDT0 or USDC.e) in the X-Pool Investment Vault on Clearpool: https://vaults.clearpool.finance/vault?address=0x6b9e9d89e0e9fd93eb95d8c7715be2a8de64af07
Funds deposited are invested by HT Markets in a delta-neutral basis trading strategy on three centralised exchanges. Its value trails the investment strategy returns and is updated daily based on the NAV of the strategy. Additional information about the X-pool can be found here: https://www.htdigitalassets.com/xpool-explainer

cUSDX is the LP token received by users depositing USDX in the T-Pool Investment Vault on Clearpool. https://clearpool.finance/lending/tpool.
Funds deposited are invested by HT Markets in short-term US treasuries and US bonds on regulated financial markets. cUSDX holds a 1-1 peg with USDX and is therefore also trailing the value of 1 USD whilst allowing users to earn a short-term Treasury yield. Additional information about the T-Pool investment strategy can be found here: https://medium.com/clearpool-finance/usdx-t-pool-is-now-live-on-flare-c2f714c42efd

This proposal ensures that yUSDX and cUSDX can be safely integrated as collateral by Flare-native DeFi protocols, including SparkDEX and Kinetic, and future lending/borrowing markets.
These feeds will enable secure collateral valuation, liquidation safeguards, and system-wide composability.
For reference, this ask is closely mirroring the request for the already available USDX FTSO: https://flare-systems-explorer.flare.network/price-feeds/ftso?feed=0x01555344582f555344000000000000000000000000

RATIONALE

1. USDX / USD feed
   USDX is a fiat-backed USD stablecoin (1:1 with USD). Adding a canonical FTSO price enables:
   On-chain collateral valuation
   Liquidation logic for lending protocols
   Accurate routing and pricing on SparkDEX
   Oracle-safe usage in Kinetic and future leveraged vaults
   Enhanced transparency and risk management for the ecosystem

2. yUSDX / USD feed
   yUSDX is a yield-bearing token representing accrued returns from the X-pool, curated by HT Markets. Its value floats based on NAV, therefore a reliable oracle is required for:
   Collateralisation and leveraged strategies on lending protocols
   NAV-based accounting for future structured products on Flare
   This feed enables new DeFi integrations around real-world yield and delta-neutral strategies.

TECHNICAL PARAMETERS

We propose the following:
Symbol Names

• cUSDX/USD
• yUSDX/USD

Update Frequency: Standard FTSO epoch timing, Consistent with existing crypto feeds

Data Providers
No special requirements; feeds derive from cUSDX market references is its market cap since its issued 1-1 against USDX deposited to the T-Pool: https://flarescan.com/address/0xfe2907dfa8db6e320cdbf45f0aa888f6135ec4f8

NAV logic for yUSDX is provided via API from the X-Pool smart contract:
https://mainnet.flarescan.com/address/0xd006185B765cA59F29FDd0c57526309726b69d99/contract/14/readContract

7. getRate (0x679aefce)

cUSDX price is expected to stay near $1.00
yUSDX price will be submitted based on daily NAV/unit calculated external (CEX) yield source inputs. NAV updates happen at 08:30 UTC
These feeds do not require changes to FTSO reward model or infrastructure

We invite feedback and are ready to support any technical steps required.

Trading Venues (CeX/DeX/Aggregators)

- SparkDEX: cUSDX/USDT0, cUSDX/USDC.e, cUSDX/USDX, yUSDX/cUSDX, yUSDX/USDT0

Daily Volume

<$1M

Contact (Email or Telegram)

contact@htdigitalassets.com

[dineshpinto]

Thanks for raising a new feed request issue. Your request has been noted and will be processed according to the guidelines defined in FIP.13 (Section 2.5). We will notify you if any further information is needed.