USDT0: the omnichain USDT on 24 chains, one Ethereum lockbox and the risks behind it

USDT0 is the version of Tether’s USDT that moves between blockchains without a wrapped token or a bridge pool. Every USDT0 in circulation is meant to match one USDT locked in a single contract on Ethereum, and the token is minted and burned on 24 networks through LayerZero’s OFT standard. It is run by Everdawn Labs, a company registered in the British Virgin Islands, not by Tether itself, and it has no governance token of its own.

On 13 November 2026 the official USDT0 dashboard showed a total supply of $3,711,555,529 (read at 19:26 UTC), up 11.9% over 30 days, while DefiLlama counted $3.59 billion of USDT in the Ethereum lockbox, against $3.30 billion a week earlier. That is about half of the $7.76 billion peak DefiLlama recorded on 18 October 2025. This page explains how USDT0 works, who controls it, how Tether’s freeze powers carry over, and where the risks sit: one lockbox, one 3-of-5 multisig and a cross-chain messaging layer.

What is USDT0? A claim on USDT locked on Ethereum

USDT0 uses a model called lock and mint. A holder sends ordinary USDT on Ethereum to an adapter contract, the OFT Adapter, which keeps it. LayerZero carries a message to the chosen destination network, where the USDT0 contract mints the same amount. To get back to USDT, the holder burns USDT0 on any supported chain and the adapter on Ethereum releases the matching USDT.

There is no USDT0 token on Ethereum itself. Ethereum only holds the lockbox; USDT0 exists on the other networks. Transfers between two USDT0 chains, say from Arbitrum to Polygon, never touch Ethereum: the token is burned on the source chain and minted on the destination, so the total supply does not change and the USDT in the lockbox stays where it is.

This is the main difference with the older way of moving USDT across chains, where a bridge locked USDT on one side and issued its own IOU on the other, a token that only the bridge stood behind. With USDT0, every network shares one contract design, one supply and one backing pool. The trade-off is concentration: every USDT0 on every chain leans on the same Ethereum contract and the same messaging layer. Our guide how a cross-chain bridge works explains the general difference between lockboxes, messaging and liquidity pools.

USDT0 vs USDT: what changes for a holder

The dollar exposure is the same: USDT0 is worth what the locked USDT is worth, and USDT is redeemable only through Tether, under Tether’s conditions. What changes is the contract. USDT0 is minted by Everdawn’s contracts, not by Tether, and its rules (upgrades, freezes, which chains are connected) are set by Everdawn’s multisig. Exchanges can redeem USDT0 back into USDT on Ethereum directly, according to the USDT0 documentation; other holders can swap it or send it back to Ethereum through the official transfer page.

The token contracts on most EVM networks support signed approvals and gasless transfers (EIP-2612 and EIP-3009), signatures from smart-contract wallets (EIP-1271) and the ERC-7802 cross-chain interface. On Hedera, Tempo, HyperCore and Stellar, USDT0 takes the native token format of the chain. On Polygon PoS, the existing USDT contract was upgraded in place to become USDT0, so the address many users already held did not change.

How a USDT0 transfer moves, step by step

1. The sender signs a transfer on the source chain. If the source is Ethereum, USDT goes into the OFT Adapter; on any other USDT0 chain, the USDT0 is burned.
2. LayerZero turns the transfer into a cross-chain message addressed to the USDT0 contract on the destination chain.
3. Three independent verifier networks (DVNs) must each confirm the message: LayerZero’s own DVN, a DVN run for USDT0, and one run by Canary. All three are required.
4. Once the message is verified and executed, the destination contract mints USDT0, or the Ethereum adapter releases USDT if the holder is redeeming.

USDT0’s documentation says a transfer can take as little as 30 seconds and that most routes charge no protocol fee; the sender still pays gas and the LayerZero message cost on the source chain. Average transfers are large. On 13 November 2026 the official analytics page showed 65,146 transactions over 30 days for $4.20 billion of volume, an average of $64,520 each.

One route works differently. IOTA’s main network is served by a second lockbox on Ethereum, a dedicated adapter that is paired with IOTA only. USDT0 minted on IOTA cannot be sent straight to Arbitrum or Plasma; it has to come back through Ethereum first. On 13 November 2026 that lockbox held about 824,794 USDT, against roughly 3.59 billion USDT in the main adapter.

The Legacy Mesh: reaching USDT on Tron, TON, Solana and Celo

Most USDT does not live on chains connected to USDT0. It sits in Tether’s own deployments on Tron, Ethereum, TON, Solana and other networks, which Tether issues directly. To reach them, USDT0 launched the Legacy Mesh in February 2025. It is a hub-and-spoke network of liquidity pools with Arbitrum as the hub: a user deposits native USDT into a pool on, say, Tron, the message is verified by DVNs, and the Arbitrum pool releases USDT0, which can then travel on to any USDT0 chain.

Because these are pools rather than a lockbox, the Legacy Mesh charges a fee of 0.03% per transfer, paid in USDT, and its capacity depends on how much liquidity sits on each side. The connected chains today are Ethereum, Tron, TON, Solana (added on 15 October 2025) and Celo, with Arbitrum as the hub. On 23 September 2026 USDT0 said more than 80% of Legacy Mesh volume ran between Ethereum and Tron, and that it had added liquidity so a single transaction of up to $20 million could go through, with less downtime on that route. The same post warned that Legacy Mesh upgrades “may require contract migration”, something to keep in mind for anyone who builds on those pools.

Where USDT0 lives: 24 networks, and 30% of supply on Plasma

The USDT0 deployments page lists 24 native networks, counting Ethereum’s lockbox and IOTA, plus six Legacy Mesh connections; the analytics dashboard counts 30 connected chains and also lists balances on BNB Chain and Avalanche, two networks that are not on the USDT0 deployments list. The native list includes Arbitrum One, Berachain, Conflux eSpace, Flare, Hedera, HyperEVM and HyperCore, Ink, IOTA, Mantle, MegaETH, Monad, Morph, Optimism, Plasma, Polygon PoS, Rootstock, Sei, Stable, Stellar, Tempo, Unichain and X Layer.

Supply is concentrated on a handful of them. The official dashboard showed the following split at 19:26 UTC on 13 November 2026:

The same dashboard tracks cumulative inbound volume by chain, Legacy Mesh excluded: $30.44 billion into Ethereum (that is, redemptions to USDT), $17.10 billion into Plasma, $5.06 billion into Arbitrum and $3.77 billion into Tron as of 13 November 2026. The dashboard puts total volume since launch at about $118.4 billion.

Who runs USDT0: Everdawn Labs, not Tether

The operator is Everdawn Labs Limited, a British Virgin Islands company; the usdt0.to footer says USDT0 is part of it, and its terms of use, as reported by The Block, cite the British Virgin Islands Arbitration Act 2013. The Block named Lorenzo Romagnoli and Kevin Mueller as co-founders in June 2026. Everdawn told the outlet it has raised no venture funding and has been profitable since its first quarter, without giving figures. Romagnoli said that profitability “has allowed us to operate USDT0 with a long-term security mindset”.

The link with Tether is close but not spelled out. USDT0 runs on USDT that only Tether issues, Tether’s chief executive Paolo Ardoino is quoted on the USDT0 site, and the USDT0 documentation describes the network as Tether’s omnichain token infrastructure. When Tether announced a strategic investment in LayerZero Labs on 10 February 2026 (amount not disclosed), it said Everdawn Labs had used LayerZero’s technology to develop and launch USDT0 and XAUT0, the gold version, and that USDT0 had carried more than $70 billion across chains in under twelve months. The commercial terms between Tether and Everdawn, such as any licence or revenue share, are not public. Our page on Tether, the company behind USDT covers its reserves and attestations, which are what ultimately back every USDT0.

Everdawn uses the same contracts for other assets: XAUT0 for Tether Gold, CNHt0 for an offshore yuan token announced in November 2025, and USAT, a dollar stablecoin described as issued by Anchorage Digital Bank and operated by Tether.

Who holds the keys: a 3-of-5 Safe over upgradeable contracts

On Ethereum, the owner of the OFT Adapter, the contract that holds all the USDT, is a Safe multisig at 0x4DFF9b5b0143E642a3F63a5bcf2d1C328e600bf8. Read on-chain on 13 November 2026 at 19:30 UTC, it has five owners and needs three signatures. The same Safe owns the USDT0 token contract on Arbitrum, and the deployments page lists a Safe on every EVM network, mostly at the same address; a few networks, Berachain and Rootstock among them, use different ones.

The owner matters because the token contracts sit behind upgradeable proxies (ERC-1967). Three signers can change the code of the token, change the blocklist and change the cross-chain settings, including which verifiers a message needs. The USDT0 documentation does not mention a timelock, and the identities of the five signers are not published. In a security post of 9 May 2026, USDT0 said every multisig transaction is reviewed by internal staff, external reviewers and auditors before it reaches a signer, and that its software libraries are pinned to fixed versions.

For a holder, this means USDT0 is about as decentralised as USDT, which is to say not at all: a small group can upgrade it, and Tether can freeze the underlying USDT in the lockbox. The difference is that the group is Everdawn’s, not Tether’s.

Freezes: the blocklist travels with the token

The USDT0 contracts keep an on-chain list of blocked addresses, maintained by the contract owner; a blocked address cannot send tokens. The use-cases page puts it plainly: “The USDT0 Network supports blacklisting and freezing functionalities, enabling blockchains to meet regulatory requirements and process law enforcement requests”.

So a USDT0 holder can be frozen on two levels. On each USDT0 chain, the Everdawn Safe can block an address. And since the backing is USDT on Ethereum, Tether keeps its own power to blacklist USDT addresses, as it did when it froze 32 Tron addresses holding about $27 million on 29 October 2026 (our report on that freeze; that case concerned USDT, not USDT0). How freeze requests are passed from Tether or police forces to Everdawn, and whether Tether can trigger a USDT0 freeze itself, is not described in the documentation.

The LayerZero dependency, and what the Kelp hack changed

Every mint and every release of USDT0 starts with a cross-chain message, so the token is only as safe as those messages. When it launched in January 2025, each message needed two verifiers. In a post of 9 May 2026, USDT0 said it had since moved every USDT0 route to three of three, without dating the change: LayerZero, USDT0’s own DVN and Canary must all sign, so a single compromised verifier cannot forge a mint. It also said it plans to go to four of four and then five of five as new verifiers pass its checks, without a date.

The timing of that upgrade is not abstract. On 18 April 2026 an attacker forged a LayerZero message on a route used by Kelp DAO’s rsETH and released about $292 million of tokens. LayerZero’s post-mortem said Kelp’s route relied on a single verifier. Evercrest Technologies, the company behind Kelp, later sued LayerZero Labs and its co-founder Bryan Pellegrino in the Supreme Court of British Columbia. According to The Block (25 September 2026), the filing alleges that LayerZero had warned USDT0 about risks tied to default verifier settings before the exploit. These are allegations: Pellegrino called the claim “meritless”, and no court has ruled on it. No USDT0 funds were lost in that attack or in any other incident on record.

The most recent test came on 5 November 2026, when a bug in the Reth Ethereum client led LayerZero to pause certain cross-chain routes as a precaution while Base and other networks shipped fixes. No public source has named USDT0 among the paused routes, and no funds were reported lost. Our page on LayerZero and its messaging model explains how DVNs, executors and the security settings of each application fit together.

USDT0 supply and TVL in November 2026

Two figures are quoted for USDT0, and they measure different things. DefiLlama classes USDT0 as a bridge and counts the USDT held in the Ethereum adapter. Read directly on Ethereum at block 26,408,130 (19:27 UTC on 13 November 2026), the main adapter held 3,589,348,201 USDT and the IOTA lockbox 824,794 USDT, about $3.590 billion in all. The official dashboard instead adds up USDT0 balances chain by chain: $3,711,555,529 at 19:26 UTC the same day, about $121 million more. Part of that difference sits in entries the dashboard counts outside the native USDT0 networks, such as BNB Chain ($57.5 million) and the Legacy Mesh pools on TON, Solana and Celo. Everdawn has not published a reconciliation of the two figures.

Neither Everdawn nor any of the connected chains has published a reason for the rise of the past week. The USDT0 blog has had no post since 21 October and no new network or integration was announced in November. What the figures do show is a rebound from a low, not a record: the lockbox held $3.11 billion on 30 October and is still less than half its October 2025 peak. At 19:28 UTC on 13 November, DefiLlama’s protocol list put the 7-day change at +6.7% and the 1-day change at +4.0%, figures that move with each new reading. It also comes while USDT itself has been shrinking, which means USDT0 has been taking a slightly larger share of a smaller pie.

Earlier milestones give a sense of scale. USDT0 said it had moved $63 billion in its first year across 18 ecosystems (post of 15 January 2026), Tether counted more than $70 billion on 10 February 2026, and crossed $100 billion of volume in 525 days on 25 June 2026, when The Block counted about $4.1 billion in circulation. The protocol has no fee or revenue series on DefiLlama.

Audits and bug bounty

Everdawn keeps its audit reports in a public GitHub repository, last updated on 13 October 2026. The first reviews predate launch: Paladin (10 January 2025) and Guardian (14 January 2025). ChainSecurity’s report on the core contracts is dated 14 January 2025 and lists two low-severity findings, one fixed and one accepted as a risk, with no critical, high or medium issue. OpenZeppelin reviewed the code from 21 to 24 January 2025; its report, dated 25 January, lists 15 notes and no issue of low severity or above. Later work covers each new deployment: Guardian has published around 60 short reviews of new chains and wiring changes through September 2026, OtterSec and Zellic reviewed the TON and Stellar versions (Zellic’s Stellar report is dated 27 March 2026), OpenZeppelin covered the ERC-7802 upgrade, Hedera, Stellar and IOTA, and Certora ran a formal verification of the IOTA coin.

USDT0 also runs a bug bounty on Immunefi with rewards of up to $6 million for critical vulnerabilities, and its documentation links an economic risk analysis by Chaos Labs. An audit covers the code as written on a given day; it does not cover who signs the multisig, how the verifiers are run or what Tether does with its reserves.

From Ink in January 2025 to Stellar in September 2026

USDT0 went live on 16 January 2025 on Ink, the layer 2 network built by Kraken. Arbitrum became the hub of the Legacy Mesh, launched on 11 February 2025. Solana joined the mesh on 15 October 2025, and Celo is now connected too. Plasma, a chain built for stablecoins, launched its mainnet with USDT0 on 25 September 2025 and now holds the largest share of supply.

In 2026 the list kept growing: MegaETH on 9 February, Morph on 11 February, Hedera on 12 March, Tempo on 27 March and Stellar on 2 September. Not every network stayed. USDT0 support on Corn was wound down in June 2026, with free withdrawals through Plasma until 25 June and a 10% fee to reclaim tokens after that date, according to The Block. In its first-anniversary post, USDT0 listed its 2026 priorities as more issuance on existing chains, higher volumes and deeper liquidity.

USDT0 against other ways to move dollars across chains

The closest equivalent is Circle’s Cross-Chain Transfer Protocol for USDC, which also burns on one chain and mints on another, with a key difference: Circle is both the issuer of USDC and the operator of the transfer system, so there is no separate lockbox. With USDT0, Tether issues the asset and Everdawn runs the cross-chain layer on top of it.

Liquidity-pool bridges such as Stargate, also built on LayerZero, let users swap USDT on one chain for USDT on another, at a price that depends on how full each pool is. Wrapped USDT issued by bridges like Wormhole or Axelar is a third option, where the bridge itself is the backer. And for many payments, users simply stay on Tether’s own deployments on Tron or Ethereum, which are issued and redeemed by Tether directly. USDT0 sits between the first and the last: one token across many chains, with Tether’s USDT behind it but Everdawn’s contracts in front.

What could go wrong, and what to watch

The risks of USDT0 add up in layers. First comes everything that applies to USDT: Tether’s reserves, its attestations and its freeze powers. Then the lockbox: a bug or a bad upgrade in the Ethereum adapter would affect USDT0 on every chain at once. Then the keys: three of five unnamed signers can upgrade the contracts, with no timelock described. Then the messaging: a forged LayerZero message on a route could mint USDT0 that nothing backs, which is exactly what the three-verifier setup is meant to prevent.

Nothing of the kind has been reported in nearly two years of operation, and every USDT0 route now needs three verifiers where Kelp’s route had one. The points to watch are the promised move to four and five verifiers, any Legacy Mesh contract migration, whether Everdawn publishes the names of its signers or a timelock, and whether the supply recovery of November holds after the stablecoin outflows of October.