Bridges
Use this reference to compare bridge interfaces, cross-chain infrastructure, aggregators, and intent networks that support Stable. For USDT0 transfer mechanics, see Bridging USDT0 to Stable. For a hands-on walkthrough, see the Bridge USDT0 to Stable Testnet tutorial.
USDT0 source chains
Any chain with USDT0 can bridge to Stable via the OFT Mesh. Any chain with native USDT can route through the Legacy Mesh via the Arbitrum hub. Current participants:
| Path | Example chains | Mechanism | Fee |
|---|---|---|---|
| OFT Mesh | Arbitrum, Bera, Conflux, Ethereum, Flare, Hedera, Hyperliquid, Ink, Mantle, MegaETH, Monad, Morph, MP1, Optimism, Plasma, Polygon, Rootstock, Sei, Tempo, Unichain, X Layer | Burn on source, mint on Stable | Source chain gas only |
| Legacy Mesh | Tron, TON | Lock native USDT → Arbitrum hub → mint USDT0 on Stable | 0.03% + source chain gas |
Ethereum and Arbitrum support both paths: users holding native USDT can use the Legacy Mesh, while users holding USDT0 can use the OFT Mesh directly.
Contract addresses
| Testnet (chain ID 2201) | Mainnet (chain ID 988) | |
|---|---|---|
| LayerZero EID | 40374 | See LayerZero deployed contracts |
| LayerZero Endpoint V2 | 0x3aCAAf60502791D199a5a5F0B173D78229eBFe32 | See LayerZero docs |
| USDT0 token | 0x78Cf24370174180738C5B8E352B6D14c83a6c9A9 | 0x779Ded0c9e1022225f8E0630b35a9b54bE713736 |
| USDT0 OApp (on Stable) | N/A | 0xedaba024be4d87974d5aB11C6Dd586963CcCB027 |
| Source USDT0 (Sepolia) | 0xc4DCC311c028e341fd8602D8eB89c5de94625927 | Use mainnet USDT0 on source chain |
| Source OApp (Sepolia) | 0xc099cD946d5efCC35A99D64E808c1430cEf08126 | Use mainnet OApp on source chain |
| LiFi Diamond (Stable mainnet) | N/A | 0x026F252016A7C47CDEf1F05a3Fc9E20C92a49C37 |
For the full testnet contract list (LayerZero endpoint, DVN, executor), see Testnet ecosystem contracts.
STABLE OFT contracts
The STABLE token bridges to other chains using the LayerZero OFT standard. The adapter on Stable locks STABLE for outbound transfers; the upgradeable proxy on each remote chain mints and burns the wrapped supply. For the security model and a description of each contract's role, see Bridge security and DVNs.
| Chain | Contract | Address |
|---|---|---|
| Stable | StableOFTAdapter | 0x386f92606b2D5E0A992ECc3704c31eF39Ff56392 |
| BSC | StableOFTUpgradeable (proxy) | 0x011EBe7d75E2C9D1E0bD0be0bEf5C36f0A90075F |
| HyperEVM | StableOFTUpgradeable (proxy) | 0xa51dC81944a15623874981181a99D6c56B20ED56 |
Stable's DVN operators
Stable's bridges run a 3/3 required DVN configuration: three independent operators must each sign every cross-chain message before it is accepted. There is no optional pool. The three required signers and their DVN contract addresses:
| Operator | DVN address |
|---|---|
| LayerZero Labs | 0x9c061c9a4782294eef65ef28cb88233a987f4bdd |
| Canary | 0x8d6cc20d84fbeb5733c60436ceb8957da2ac02c8 |
| Horizen | 0x965a80dc87cec5848310e612dead84b543aef874 |
For the on-chain config per pathway, see LayerZero deployed contracts. For the security rationale, see Bridge security and DVNs.
Bridge providers
A bridge moves assets between chains through protocol-defined verification and settlement. The options below include user-facing interfaces, messaging protocols, liquidity bridges, aggregators, and interoperability infrastructure.
| Provider | Type | Status | Description | Docs / Get started |
|---|---|---|---|---|
| USDT0 | Official asset bridge interface | Live | Transfers USDT0 through the OFT Mesh and native USDT through the Legacy Mesh | https://usdt0.to |
| LayerZero | Cross-chain messaging (OFT) | Live | Powers USDT0 OFT burn/mint transfers with DVN verification | https://docs.layerzero.network/v2 |
| Chainlink CCIP | Cross-chain messaging and token transfer | Live | Transfers BTC.b, LBTC, and LINK across supported Stable lanes | Stable CCIP Directory |
| Stargate | Direct bridge (liquidity pools) | Live | Uses unified liquidity pools for stablecoin routes | https://docs.stargate.finance |
| Gas.Zip | Direct bridge (liquidity routing) | Live | Routes liquidity across supported chains | https://dev.gas.zip |
| LiFi | Bridge aggregator | Live | Routes across multiple bridges and DEX swaps | https://docs.li.fi |
| Polymer | Cross-chain interoperability (IBC) | Integration in progress | Provides IBC-based messaging for Ethereum-compatible chains | https://docs.polymerlabs.org |
USDT0
The USDT0 interface provides user-facing transfers for USDT0 and native USDT. It uses LayerZero as the underlying cross-chain messaging infrastructure.
Capabilities- Transfer USDT0 through the OFT Mesh
- Route native USDT through the Legacy Mesh
- Quote destination output and fees before submitting a transfer
LayerZero
LayerZero powers USDT0 OFT burn-and-mint transfers and the Legacy Mesh messaging path.
Capabilities- OFT-standard burn-on-source and mint-on-destination transfers
- DVN message verification
- Support for the USDT0 OFT and Legacy Mesh paths
Chainlink CCIP
Chainlink CCIP provides cross-chain messaging and token transfers on Stable. The CCIP Directory is the source of truth for current lanes, contracts, and supported tokens.
Capabilities- Arbitrary cross-chain messaging
- Token transfers for
BTC.b,LBTC, andLINK - Current Stable mainnet route and contract discovery through the CCIP Directory
Stargate
Stargate is a liquidity-pool bridge with stablecoin routes.
Capabilities- Unified liquidity pools across chains
- Stablecoin routing
- Destination-chain liquidity settlement
Gas.Zip
Gas.Zip routes cross-chain transfers through supported liquidity sources.
Capabilities- Cross-chain liquidity routing
- Fast transfer routes
- Broad chain coverage
LiFi
LiFi aggregates routes across bridges and DEX swaps.
Capabilities- Multi-bridge route optimization
- SDK and REST API integration
- DEX swap aggregation
Polymer
Polymer provides IBC-based cross-chain messaging for Ethereum-compatible chains. Its Stable integration is in progress.
Capabilities- IBC protocol messaging
- Ethereum-compatible interoperability
Intent networks
An intent describes the result you want, such as receiving a specific token on Stable. A solver supplies the destination assets and settles separately. This differs from a bridge that transfers, locks, burns, or mints assets through a fixed cross-chain route.
| Provider | Type | Status | Description | Docs / Get started |
|---|---|---|---|---|
| Aori | Intent settlement network | Live | Solvers fill signed cross-chain swap intents and settle completed fills through LayerZero | https://docs.aori.io |
| Relay | Intent network | Integration in progress | Solvers execute requested cross-chain outcomes and handle settlement | https://docs.relay.link |
Aori
Aori matches signed cross-chain orders off-chain. Solvers provide the requested destination assets, and Aori settles completed fills on-chain through LayerZero.
Capabilities- Signed cross-chain swap intents
- Off-chain order matching
- Solver-provided destination liquidity
- On-chain settlement through LayerZero
Relay
Relay uses a solver network to execute requested cross-chain outcomes. Its Stable integration is in progress.
Capabilities- Intent-based transfers
- Solver-provided execution
- Solver-network settlement
Fee structure
| Provider | Fee model |
|---|---|
| USDT0 (OFT Mesh) | Source chain gas only; no USDT0 protocol fee |
| USDT0 (Legacy Mesh) | 0.03% of the transferred amount, charged by the USDT0 team, plus source chain gas |
| Chainlink CCIP | Fees vary by lane and transferred token; use the route quote and Stable CCIP Directory |
| Stargate | Liquidity pool fees apply; see Stargate docs |
| LiFi | Aggregator routing fees may apply depending on the selected path |
| Gas.Zip | See Gas.Zip docs for its current fee schedule |
| Aori | Fees are included in the solver quote and vary by route |
| Relay | Solver fees apply; see Relay docs |
Have a bridge integrating Stable? Reach out at bizdev@stable.xyz.