# Spark discloses live X Layer spUSDC deployment and unexercised allocation route

> The new vault introduces an administered savings rate and a configured CCTP v2 route to Ethereum legacy sUSDC. Its yield liability accrues independently of the investment position.

- URL: https://riadefi.com/on-chain/2026-09-25-spark-xlayer-spusdc-diamond-pau/
- Type: Launch or access
- Stage: Live launch
- Evidence: confirmed
- Materiality: material
- Event date: 2026-09-25
- Version: 1, published 2026-10-05 (first published 2026-10-05)
- Follow-up: 2026-10-12
- Advisor-relevant: no
- Affects: Spark Liquidity Layer (protocol); Spark Savings (sUSDS) (protocol)

## What happened

Spark published a deployment record for live X Layer spUSDC and segregated Ethereum and X Layer custody systems, with dated deployment and deposit evidence.

## What changed

The new vault introduces an administered savings rate and a configured CCTP v2 route to Ethereum legacy sUSDC. Its yield liability accrues independently of the investment position.

## What did not change

Existing Ethereum spUSDC custody and controller were not migrated. The disclosure does not establish US eligibility, insurance or Ketju approval.

## Confirmed

- The record identifies X Layer spUSDC proxy 0xf90E63079D97a0A1f479b2b168457F420CAFf6ba and documents deposits by external users.
- Governance controls administration; Phoenix Labs operational actors can allocate and set VSR through an AdministeredAgent.
- The October 4 official checks report that assets remained in the vault and the allocation and bridge route had not been exercised.
- The record reports 1,049.22 USDC of accrued VSR obligations not yet backed by earned yield at its October 4 snapshot.
- The stated governance acceptance deadline is March 23, 2027, with orderly wind-down required if acceptance is not obtained.

## Still open

- Production completion of the end-to-end allocation and return route.
- Spark governance acceptance and subsequent public recognition record.
- Advisor-access eligibility and proposed-size entry and exit performance.
- Whether later operations have funded the accrued yield obligations.

## What it means for an advisor

- Review the Spark Liquidity Layer authority and per-chain custody analysis against the disclosed segregated deployment.
- Review the Spark Savings alias memo before classifying X Layer spUSDC as an existing approved savings exposure; its contracts and administered liability are distinct.
- Add bridge-return reliability, yield funding and acceptance-deadline monitoring to the diligence file.

## Sources

1. [Technical Scope: Coordinated X Layer and Ethereum spUSDC Diamond PAU Deployment](https://forum.skyeco.com/t/technical-scope-coordinated-x-layer-and-ethereum-spusdc-diamond-pau-deployment/28283) · Spark / Phoenix Labs · 2026-10-05


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Published by Ketju Research on RIADeFi (https://riadefi.com). Educational research for financial professionals; not investment, legal, tax, or compliance advice.