Orbiter Finance

Orbiter Finance is a decentralized cross-chain bridge that enables near-instant transfer of native assets across more than 100 networks — including Solana, Ethereum rollups, and non-EVM chains — by combining a permissionless Maker liquidity system with ZK-SPV cryptographic verification. Founded in 2021, the protocol has facilitated over $28 billion in volume across 35 million transactions for 4.3 million users.

How It Works

Orbiter departs from the classical lock-and-mint bridge design. Instead of routing funds through custodial smart contracts, users send assets directly to a Maker's externally owned address (EOA) on the source chain. Makers are independent liquidity providers who run Orbiter's open-source client software. Upon detecting an inbound transfer, the Maker immediately releases an equivalent amount of the same native asset from its own inventory on the destination chain — no wrapped tokens, no minting.

The destination network is encoded in an "Identification Code" appended to the transfer amount, allowing the system to route without a central intermediary. This direct maker-to-user flow is what drives the protocol's 10–20 second transfer times.

Security is enforced through ZK-SPV (Zero-Knowledge Simple Payment Verification), which generates cryptographic proofs confirming two properties for every transfer:

• Existence: both the source and destination transactions occurred on their respective chains and are verifiable against Layer 1 state.
• Validity: the user's intent was faithfully executed and the Maker complied with agreed parameters.

Three contracts underpin this system. The MDC (Maker Deposit Contract) holds Maker collateral and compensates users in the event of a failed delivery. The EBC (Event Binding Contract) validates that the source and destination transactions correspond correctly. ZK-SPV generates and verifies the cryptographic proofs that confirm both. If a Maker cannot prove a successful delivery within the arbitration window, the affected user receives a full refund plus the Maker's collateral.

Fees comprise two components: a fixed Withholding Fee covering destination-chain gas, and a percentage-based Trading Fee on the transfer amount. For a 1 ETH transfer from Ethereum mainnet to zkSync Era at a 0.03% trading fee and 0.0014 ETH withholding fee, the total cost is approximately 0.0017 ETH.

Key Products and Features

Bridge & Swap is the core interface, supporting transfers of ETH, USDC, USDT, and other major assets. Supported networks include EVM rollups (Arbitrum, Optimism, Base, zkSync Era, Scroll, Linea), non-EVM chains (Solana, StarkNet, Movement, Eclipse, Fuel), major Layer 1s (Ethereum, Bitcoin, BNB Chain, Polygon), and additional ecosystems including TON, SUI, and TRON.

zkProver is Orbiter's ZK computation layer that reduces Account Abstraction gas costs by 20–30% by batching multiple ZK proofs before on-chain submission. For ERC-20 AA transfers, standard gas sits at roughly 57,135 units; zkProver reduces this to approximately 23,843 per transaction when aggregating 128 transactions together.

Aggregated zkProver Protocol extends this into an open standard allowing ZK rollups to recursively batch-verify proofs, reducing verification overhead and enabling Layer 3 scalability across participating rollups.

Inscription Cross-Rollup Protocol enables inscription minting and cross-rollup circulation with a nominal 0.00023 ETH protocol fee. Developers receive 80% cost rebates on cross-rollup inscription transactions.

LP Pools let liquidity providers earn a share of protocol trading fees proportional to their LP token balance, with APR scaling linearly with pool utilization between a minimum and maximum rate.

O-Points is a loyalty rewards system that credits users for cross-chain activity, task completion, and ecosystem app interactions. Points were used retroactively to determine OBT token airdrop eligibility.

The protocol also exposes a REST API for third-party integrations, with production endpoints at api.orbiter.finance and openapi.orbiter.finance, covering quote retrieval, supported chain listing, and transaction status tracking. An MCP server and CLI are available on GitHub for AI and developer integrations.

OBT Token

Orbiter launched its native OBT token on January 20, 2025, on Ethereum, Arbitrum, and Base. The total supply is 10 billion OBT, with 2.8 billion (28%) in circulation at the token generation event.

Token allocation:

• Community: 40%
• Ecosystem & Growth: 20% (2.5% unlocked at launch)
• Team & Contributors: 15%
• Orbiter Foundation: 15% (3.5% at launch, remainder vested monthly over 23 months)
• Seed/Series A Investors: 10%

The initial airdrop distributed 22% of the community allocation to eligible users — those with at least two months of protocol usage since December 2021 and a minimum OPoints balance. Ace-NFT holders received 17,000 OBT; standard eligible users received up to 5,600 OBT. Governance and staking were planned for rollout in the months following TGE.

Security and Audits

Orbiter's core smart contracts have been audited by SlowMist, covering asset locking and release mechanisms, multi-signature and permission systems, cross-chain message verification, and attack-resistant protocol design. The protocol reports no breach of core bridge contracts across its operational history since 2021.

In June 2023, a Discord phishing incident resulted in approximately $213,000 in user losses. This was a social engineering attack, not a bridge or smart contract exploit. Orbiter compensated affected users from its treasury.

Team and History

Orbiter Finance launched in 2021 and has operated continuously since. The project is developed under Orbiter Labs; the core team has not published named founders publicly. The protocol expanded from early liquidity experimentation to full ZK infrastructure development across 2023–2025, releasing the OBT token and expanding its ZK tooling through the zkProver and Aggregated zkProver Protocol lines.

Solana Ecosystem Fit

Solana is among Orbiter's supported non-EVM chains, with dedicated Maker addresses serving Solana-side liquidity. This enables direct ETH, USDC, and USDT bridging between Solana and major EVM networks — Ethereum, Arbitrum, Optimism, and Base — without wrapping or minting intermediary tokens.

For Solana users, Orbiter provides one of the faster paths to and from Ethereum's rollup ecosystem, with ZK-SPV verification adding cryptographic settlement assurance rather than relying solely on economic incentives. As Orbiter expands its ZK infrastructure and chain coverage, it positions itself as a connectivity layer between Solana and the broader EVM multi-chain landscape.