Scroll (SCR): how it works, supply and reviews
In short
- Type
- Zero-knowledge rollup on Ethereum (type-1 zkEVM), proven with the OpenVM zkVM since the Euclid upgrade
- Maximum supply
- Total supply of 1,000,000,000 SCR
- Risks and caveats
- Block production is still run by a centralised operator; the permissionless fallback only applies if it fails or censors.
- Checked
- 31 October 2026
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Key facts
- Ticker
- SCR
- Official site
- scroll.io
Key facts checked on 31 October 2026 against official sources.
What is Scroll
Scroll is a zero-knowledge rollup (zkEVM) on Ethereum that launched its mainnet in October 2023. SCR is its governance token, and since April 2025 Scroll describes itself as a Stage 1 rollup with a permissionless fallback if its sequencer fails or censors.
Network and consensus
| Parameter | Details |
|---|---|
| Type | Zero-knowledge rollup on Ethereum (type-1 zkEVM), proven with the OpenVM zkVM since the Euclid upgrade |
| Chain ID | Scroll Mainnet chain ID 534352 |
| Block time | About 1 second since mid-2025 (previously 3 seconds) |
| Sequencer | A centralised operator sequences blocks; if it goes down or censors L1-posted transactions, anyone can submit blocks and proofs (permissionless mode) |
| Launched | Scroll mainnet launched in October 2023 |
Supply and issuance
| Parameter | Details |
|---|---|
| Maximum supply | Total supply of 1,000,000,000 SCR |
| Initial distribution | Ecosystem and growth 35%, core contributors 23%, investors 17%, airdrops 15%, Scroll Foundation treasury 10% |
| Unlocks | Team and investor tokens start unlocking one year after the October 2024 launch and are fully unlocked after four years |
| Airdrops | 7% to the first airdrop and 8% reserved for later airdrops |
What SCR is used for
- Primary governance mechanism of the Scroll protocol through the Scroll DAO
- Planned role in decentralising provers and the sequencer
- Funding ecosystem growth, stewarded first by the Scroll Foundation
Who develops and governs Scroll
- Foundation
- The Scroll Foundation stewards the Scroll DAO and holds a 10% treasury
- Governance
- Upgrades are proposed in the forum and voted by the Scroll DAO; the Security Council then executes them on-chain
- Upgrade keys
- A 12-member Security Council controls a 9-of-12 multisig; approved upgrades run through a 3-day timelock, emergency fixes have no delay
- Open source
- Code, audits and documentation are published under the scroll-tech GitHub organisation
History
| Date | Event |
|---|---|
| October 2023 | Scroll mainnet launches. |
| 22 October 2024 | SCR token launches and airdrop claims open. |
| 13 February 2025 | Scroll Security Council launches. |
| April 2025 | Euclid upgrade adds a permissionless sequencer fallback; Scroll describes itself as Stage 1. |
| 2025 | Scroll shifts strategy from the chain itself to products on top of it. |
| 30 July 2026 | Scroll Sepolia testnet is shut down; mainnet keeps running. |
Security and audits
- Scroll publishes audits by multiple firms and runs a bug bounty programme.
- Upgrades approved by governance take effect after a 3-day timelock, so users can exit first; urgent security fixes are the exception.
Security incidents
| Date | What happened | Source |
|---|---|---|
| 19 July 2024 | Finalization delay: Scroll said on X that it was notified of a potential exploit in its ecosystem and, after verifying with the Rho Markets team, temporarily delayed the finalization of the chain to assess the situation. | x.com |
Further incidents are reported by third parties (press, incident databases) but are not confirmed in the company’s own channels, so they are not listed here.
Risks and caveats
- Block production is still run by a centralised operator; the permissionless fallback only applies if it fails or censors.
- The Security Council can implement emergency upgrades with no delay and holds admin control over the governance contracts.
- Scroll's 2025 strategy focuses on products rather than the chain, and its website now leads with AI products.
Official links
- Website: scroll.io
- Docs: docs.scroll.io/en/home
- Blog: scroll.io/blog
- Source code: github.com/scroll-tech
- Audits: github.com/scroll-tech/scroll-audits
Questions and answers
What is Scroll?
Scroll is a zero-knowledge rollup (zkEVM) on Ethereum whose mainnet launched in October 2023.
What is the maximum supply of SCR?
1,000,000,000 SCR, launched on 22 October 2024.
What is SCR used for?
SCR is Scroll's governance token, with a planned role in decentralising provers and the sequencer.
Is Scroll decentralised?
Partly: a centralised operator produces blocks, but since the 2025 Euclid upgrade anyone can submit blocks and proofs if it fails or censors.
Who can upgrade Scroll?
The Scroll DAO votes on upgrades and a 12-member Security Council (9-of-12 multisig) executes them, with emergency powers.
Sources
- Scroll — Home
- Scroll Blog — SCR Token
- Scroll Blog — Stage 1 confirmed
- Scroll Blog — Introducing Scroll Security Council
- Scroll Blog — First airdrop
- Scroll Blog — 1 second block time
- Scroll Blog — 2025 Wrapped up
- Scroll Blog — Acquiring Honeypop
- Scroll Docs — Developers
- Scroll Docs — Audits and bug bounty
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