From a wallet, USX looks like a transferable Solana dollar. Behind the mint sit a permissioned institutional gate, offchain custodians, hedge positions and a weekly solvency proof. The token travels farther than the contractual redemption promise.
Several unrelated assets use USX. This dossier follows only Solstice Finance USX, whose product page, builder docs and Solana Explorer converge on mint 6FrrzDk5mQARGc1TDYoyVnSyRdds1t4PbtohCD6p3tgG.
Solstice calls it a settlement asset, not a bank deposit. It is transferable and aims at one dollar, but USX itself has no governance vote or automatic yield.
Solstice says audited cash, tokenized Treasuries and delta-neutral positions can back USX. Collateral starts in Solana vaults; a portion moves to Copper and Ceffu for off-exchange settlement.
Accountable compares verified entity-level assets with circulating USX weekly. That is not a title register for individual reserves: Solstice says holders have no ownership, claim or beneficial interest in the collateral.
KYC-approved institutions use the two-step mint and redemption program. User docs list USDC, USDG and USDT for minting and call USDG the primary redemption asset.
The integration guide instead describes USDC and USDT in both directions. An API example cannot create a retail contractual right, so the disagreement remains material.
Other users normally swap in or out. Their immediate exit depends on DEX liquidity and can trade away from one dollar.
The oracle layer cross-checks Solstice prices with Pyth and blocks operations when prices disagree or feeds go stale. Whitelists decide who reaches primary issuance.
Builder docs give a multisig control over upgrades, parameters, permissioned accounts, collateral, custodians and emergency movements. No reviewed source expressly documents an account freeze or blacklist function.
The product site simultaneously calls the USX program non-upgradeable. Until Solstice reconciles token code, operational programs and admin authority, this is a documentation conflict, not a settled fact.
USX is the settlement unit. YieldVault deposits issue eUSX, a distinct receipt whose exchange rate reflects strategy results and whose exit can carry a cooldown.
SLX and stSLX are separate governance instruments. Neither eUSX yield nor SLX votes make an ordinary USX holder a reserve owner or whitelisted redeemer.
Solstice dates its first listed Halborn USX review.
The Solana settlement asset opens to users.
Halborn closes its current public USX program review.
Whitepaper v2 documents entities and controls.
Last evidence review: 2026-09-04
USX is the base settlement asset of Solstice Finance, a Solana DeFi protocol. It is designed to track the U.S. dollar and is backed, according to Solstice, by a diversified pool that can include audited cash, tokenized Treasuries and delta-neutral hedged positions. USX is distinct from SLX, Solstice's alignment/governance token, and from eUSX, the separate yield-bearing receipt issued by YieldVault.
The public launch occurred on September 30, 2025. Today, USX is available through the Solstice app and Solana DEXs, while the protocol presents YieldVault deposits and integrations as live uses. The documentation describes direct minting and primary redemption as restricted to KYC'd institutional partners; other users acquire USX through swaps.
Solstice positions USX as a native Solana settlement layer intended to reduce the need to bridge stablecoins elsewhere for yield. It gives Solstice strategies a common dollar-denominated entry and exit asset and provides a transferable unit for Solana DeFi integrations.
That purpose is not the same as a guaranteed bank-dollar claim. Solstice's own solvency disclosure says holders have no direct ownership, claim or beneficial interest in reserve assets, and describes Proof of Solvency as verification rather than a guarantee of value or redemption liquidity.
The USX Program accepts supported collateral through a two-step, permissioned minting process and burns USX on redemption or vault withdrawal. The user documentation lists USDC, USDG and USDT for KYC'd institutional minting, with USDG described as the primary redemption asset; retail users generally swap into USX in the app or on Solana DEXs. Supply is described as demand-driven, with no emissions or inflation.
The smart-contract documentation describes multiple Solana programs: USX handles minting, redemption and collateral management; YieldVault locks USX and issues eUSX; and an oracle layer validates prices. It says minting/redemption accounts are whitelisted, oracle failures can halt operations, and critical configuration and upgrade authority are multisig-controlled. The product page calls the USX Program non-upgradeable, while the builder documentation describes a multisig-held program upgrade authority; this unresolved documentation inconsistency is itself material and should not be presented as settled.
No. USX is the dollar-oriented settlement asset. SLX is documented separately as Solstice's alignment and governance token, while eUSX is a YieldVault receipt representing a vault position.
Solstice's Proof of Solvency disclosure expressly says holders have no direct ownership, claim or beneficial interest in collateral assets and that verification is not a guarantee of value or redemption liquidity. Primary minting and redemption are described for KYC'd institutional partners; retail access is generally through swaps.
USX is live on Solana and functions as Solstice's common entry and exit asset for YieldVault strategies. Users can swap it through the Solstice app or supported Solana DEXs and use it across the integrations Solstice lists.
The USX technical page says its supply model is demand-driven with no emissions or inflation. No USX vesting schedule is stated there; SLX distribution and vesting are separate matters.
The technical documentation describes permissioned, whitelist-controlled minting and redemption and a token authority that controls minting/burning. It does not, in the reviewed sources, expressly document a freeze or blacklist function. It also describes multisig administration and upgrade authority, while the product page says non-upgradeable; readers should treat the control surface as documentation-dependent rather than assume unrestricted or absent admin power.
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