[Crypto projects](https://revain.org/projects/) › BOB

# BOB: how it works, supply and reviews

## In short

- **Type**: Hybrid ZK rollup on Ethereum built on the OP Stack
- **Issuance**: BOB token supply can change through governance-controlled issuance
- **Risks and caveats**: Most system contracts can be upgraded by a 4-of-6 multisig, and a Guardian multisig can pause all withdrawals.
- **Checked**: 31 October 2026

## Key facts

- **Ticker**: BOB
- **Official site**: [gobob.xyz](https://www.gobob.xyz/)

Key facts checked on 31 October 2026 against official sources.

## What is BOB

BOB is a hybrid Layer 2: an OP Stack rollup on Ethereum that uses ZK proofs to settle disputes and is adding Bitcoin-based security through BitVM and BTC-staked finality providers. BOB Gateway lets users move native BTC into DeFi on BOB and other chains through liquidity providers. BOB is also the name of its ERC-20 token.

## Network and consensus

| Parameter | Details |
|---|---|
| Type | Hybrid ZK rollup on Ethereum built on the OP Stack |
| Consensus | Kailua: optimistic proposals every 12 hours, disputes settled with ZK proofs; finality after 4 days or instantly with a validity proof |
| Smart contracts | Full EVM compatibility |
| Chain ID | Mainnet chain ID 60808 |
| Launched | Block 1 on 11 April 2024 (official RPC) |
| Bitcoin bridge | BitVM bridge (1-of-n security) on testnet; docs gave a Q4 2025 mainnet target |

## Supply and issuance

| Parameter | Details |
|---|---|
| Issuance | BOB token supply can change through governance-controlled issuance |
| Bridging | BOB token moves only via Chainlink CCIP: lock/unlock on BOB, burn/mint on Ethereum and BNB Chain |

## What BOB is used for

- Protocol reward token and liquidity incentives
- Gas subsidies on BOB
- Governance through the BOB DAO (gov.gobob.xyz)

## Who develops and governs BOB

- **Developer**: Built by the BOB Collective
- **Upgrade keys**: L1 and L2 Proxy Admins, System Config Owner and Guardian are 4-of-6 multisigs; the Guardian can pause all withdrawals
- **Token admin**: BOB token contracts share a 2-of-4 admin multisig, with a plan to move to 3-of-4
- **Sequencing**: BOB runs Kailua in vanguard mode: its proposer has priority; others may propose after 30 days of inactivity

## History

| Date | Event |
|---|---|
| — | BOB mainnet produces block 1. |
| February 2025 | Kailua hybrid ZK dispute system audited before BOB's upgrade to a hybrid ZK rollup. |
| 31 October 2026 | LayerZero endpoint on BOB closes; wBTC.OFT can no longer leave BOB, with a user deadline extended to 15 December 2026. |

## Security and audits

- Kailua, BOB Gateway, USDC bridge and FusionLock contracts each have published audit reports.
- Anyone can challenge an invalid state proposal by staking 0.5 ETH; disputes are resolved by ZK proofs.
- Users can force-withdraw to Ethereum through the native bridge even if the sequencer is offline.

## Security incidents

No security incident is recorded in the sources checked on 31 October 2026 (the company’s own channels and incident databases): [defillama.com/hacks](https://defillama.com/hacks), [hacked.slowmist.io/search](https://hacked.slowmist.io/search/), [rekt.news/leaderboard](https://rekt.news/leaderboard/), [gobob.xyz/en/blog](https://www.gobob.xyz/en/blog), [forum.gobob.xyz/search.json](https://forum.gobob.xyz/search.json?q=incident), [docs.gobob.xyz/docs/reference/audits](https://docs.gobob.xyz/docs/reference/audits/), [docs.gobob.xyz/docs/reference/privileged-roles](https://docs.gobob.xyz/docs/reference/privileged-roles)

## Official BOB contracts

| Network | Contract address |
|---|---|
| BOB | [0xb0bd54846a92b214c04a63b26ad7dc5e19a60808](https://explorer.gobob.xyz/address/0xb0bd54846a92b214c04a63b26ad7dc5e19a60808) |
| Ethereum | [0xC9746F73cC33a36c2cD55b8aEFD732586946Cedd](https://etherscan.io/address/0xC9746F73cC33a36c2cD55b8aEFD732586946Cedd) |
| BNB Smart Chain | [0x52B5fB4B0F6572B8C44d0251Cc224513ac5eB7E7](https://bscscan.com/address/0x52B5fB4B0F6572B8C44d0251Cc224513ac5eB7E7) |

Gas on BOB is paid in ETH; BOB is an ERC-20 token on BOB, Ethereum and BNB Smart Chain.

## Risks and caveats

- Most system contracts can be upgraded by a 4-of-6 multisig, and a Guardian multisig can pause all withdrawals.
- BTC on BOB is mostly wrapped BTC or staking tokens whose backing is held by their own issuers, not by BOB.
- The BOB proposer has priority in vanguard mode, and finality without a validity proof takes 4 days.

## Official links

- Website: [www.gobob.xyz](https://www.gobob.xyz/)
- Docs: [docs.gobob.xyz](https://docs.gobob.xyz/)
- Source code: [github.com/bob-collective/bob](https://github.com/bob-collective/bob)
- Block explorer: [explorer.gobob.xyz](https://explorer.gobob.xyz/)
- Governance: [gov.gobob.xyz/dao](https://gov.gobob.xyz/dao)
- Blog: [www.gobob.xyz/en/blog](https://www.gobob.xyz/en/blog)

## Questions and answers

**What is BOB?**

BOB is a hybrid Layer 2: an OP Stack rollup on Ethereum that settles disputes with ZK proofs and is adding Bitcoin security via BitVM. BOB Gateway brings native BTC into DeFi.

**Who holds the BTC on BOB?**

BOB Gateway liquidity providers swap BTC into wrapped BTC or BTC staking tokens, so the BTC sits with those tokens' issuers; the BitVM bridge was still on testnet.

**Who can upgrade BOB?**

Most system contracts are upgradable by a 4-of-6 multisig, and a Guardian multisig can pause withdrawals.

**What is the BOB token used for?**

It is a reward and incentive token used for liquidity incentives, gas subsidies and ecosystem alignment, bridged via Chainlink CCIP.

## Sources

- [BOB — Home](https://www.gobob.xyz/)
- [BOB Docs — What is BOB](https://docs.gobob.xyz/docs/quick-start/what-is-bob)
- [BOB Docs — Hybrid Chain](https://docs.gobob.xyz/docs/bob-chain/hybrid-chain)
- [BOB Docs — BitVM on BOB](https://docs.gobob.xyz/docs/bitvm/roadmap)
- [BOB Docs — BOB token](https://docs.gobob.xyz/docs/reference/bob-token)
- [BOB Docs — Privileged roles](https://docs.gobob.xyz/docs/reference/privileged-roles)
- [BOB Docs — Audits](https://docs.gobob.xyz/docs/reference/audits/)
- [BOB Docs — Networks](https://docs.gobob.xyz/docs/user-hub/networks)
- [BOB Docs — BOB Gateway](https://docs.gobob.xyz/docs/user-hub/onboard-to-bob/bob-gateway/)
- [BOB Blog — wBTC migration](https://www.gobob.xyz/en/blog/wbtc-migration)
- [BOB mainnet RPC — block 1](https://rpc.gobob.xyz/)

## More in this section

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- [Golem Network (GLM)](https://revain.org/projects/golem-network-tokens/)
- [All Crypto projects →](https://revain.org/projects/)

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Page updated: 2026-10-31

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Source: https://revain.org/projects/bob/