RWA·Ethereum · Solana
Superstate
Tokenized short-duration US government securities fund (USTB) and a tokenized crypto-carry fund (USCC) for Qualified Purchasers. Allowlist-gated ERC-20 / SPL tokens whose transfers call `isAddressAllowedForPrivateInstrument` against the Superstate Allowlist contract. Invesco assumed fiduciary responsibility for USTB in 2026.
- 01tokenized treasury fund for qualified purchasers
- 02Invesco-fiduciary-backed USTB exposure
- 03USCC crypto basis-trade fund
- 04allowlist-gated institutional cash management
- 05Solana SPL tokenized treasury
| Variable | Scope | Description |
|---|---|---|
| SUPERSTATE_USTB_ADDRESS | Client | USTB ERC-20 token (Ethereum mainnet: 0x43415eB6f5a6A6BfDe2D9eC92A6F5d36f2D7Ad7E). |
| SUPERSTATE_ALLOWLIST_ADDRESS | Client | Allowlist contract gating transfers (queried via isAddressAllowedForPrivateInstrument). |
Use Superstate for tokenized US treasury exposure backed by an Invesco-managed fund. USTB and USCC are ERC-20s on Ethereum (and SPL on Solana) where every `transfer` and `transferFrom` calls `Allowlist.isAddressAllowedForPrivateInstrument(sender, receiver)` — both wallets must be onboarded via Superstate's KYC/Investment Agreement flow before any movement is possible. Onboarding is gated to Qualified Purchasers (US: $5M+ investment portfolio); only the Superstate Admin can add/remove allowlist entries. Subscribe via `subscribe(usdc)` against the Onchain Redemptions contract; redemption is `redeem(shares)` and settles T+0 within US market hours. Read NAV via daily oracle pushes (USTB tracks the underlying short-duration UST portfolio). For consumer apps targeting non-QPs, do not integrate USTB — use Ondo USDY or Backed bIB01 instead.
- ⚑USTB / USCC are NOT permissionless — `transfer` reverts unless BOTH parties pass `isAddressAllowedForPrivateInstrument`; surface allowlist status pre-tx.
- ⚑Restricted to US Qualified Purchasers ($5M+ investments) — your KYC flow must enforce QP attestation, not just retail KYC.
- ⚑Only the Superstate Admin Address can mutate the allowlist — your app cannot self-onboard a wallet; must redirect to Superstate's portal.
- ⚑As of Q2 2026, Invesco assumed fiduciary responsibility for USTB while Superstate retains the onchain infrastructure — surface this dual-entity structure in compliance disclosures.
- ⚑Redemptions outside US market hours queue to next business day; UX should not promise instant USDC return.
- ⚑Solana USTB uses Token-2022 with a transfer-hook for allowlist checks — wallets without Token-2022 support cannot interact.
- ⚑Onchain NAV is operator-attested (oracle-pushed) — do not present it as fully-decentralized pricing.