No.192
Scroll SCR
Ethereum's zkEVM L2
π A patient scribe of Ethereum: same spells, fresh parchment, a fraction of the cost, sealed with a proof the main chain trusts on sight
π¬ βI read Ethereum carefully and copy its work onto fresh parchment, then I run that work off to the side where it costs almost nothing. When I'm done I hand back a short zero-knowledge seal. Ethereum checks the seal, not every line, and trusts me.β
- Scroll is an Ethereum Layer 2 that bundles transactions off-chain so fees and congestion drop.
- Its zkEVM is EVM-equivalent, so existing Ethereum apps and tools run on it without rewriting code.
- 2021 founded Β· pre-alpha testnet July 2022 Β· October 2023 mainnet Β· SCR token listed Oct 22, 2024.
- SCR is a governance token: total supply 1,000,000,000, unlocking on a schedule into about 2028 (not a fixed scarce cap).
π The Story
2021. Three people set out to fix a problem everyone using Ethereum already felt: at busy hours, a simple transaction could cost more than the thing you were buying. The founders, Ye Zhang, Sandy Peng, and Haichen Shen, came at it from a zero-knowledge-proofs angle, the kind of cryptography that lets you prove a calculation was done correctly without making anyone repeat it.
July 19, 2022. They opened a pre-alpha testnet, a public sandbox where developers could break things safely. The goal was never to invent a new world. It was to rebuild Ethereum's exact engine, the part that runs smart contracts, so faithfully that any existing app would feel at home with no changes.
October 2023. Scroll went live on Ethereum mainnet. Apps and DeFi projects could now deposit funds, transact for a tiny fraction of the usual fee, and still settle back to Ethereum for safety.
October 22, 2024. The SCR governance token listed on exchanges. Part of the supply went out as an airdrop to early users, handing the keys of the protocol to the people who actually used it. Scroll had grown from a research idea into a working extension of Ethereum, run in the open.
π Stats
𧩠How it works
Picture a single overloaded clerk (Ethereum) handling every request one by one. Scroll steps in as a fast assistant: it collects a big stack of transactions, processes them off to the side, and hands Ethereum just one short proof that the whole stack was done right. Ethereum checks that zero-knowledge proof instead of re-doing every transaction, which is why everyone pays less. This pattern is called a rollup.
π Light & Shadow
- Bytecode-level zkEVM: developers move Ethereum apps over without rewriting code, which lowers the barrier to building here
- Security rides on Ethereum. Scroll does not ask you to trust a new, separate chain, the final word still belongs to ETH
- Zero-knowledge proofs let the network shrink a whole batch of work into one short, cheap-to-verify seal
- It is not its own home. Scroll only exists on top of Ethereum, so it rises and falls with Ethereum's fortunes
- Crowded field. zkSync, Polygon zkEVM, Linea, and Taiko are all chasing the same zkEVM users, and standing out is hard
- The 1 billion SCR supply unlocks gradually into about 2028. As locked tokens vest, more enter circulation, which can weigh on the price (roughly 19% was circulating at listing)
- Parts of the network, like proving and sequencing, are still on the road to being fully decentralized
𧬠Evolution lineage
Scroll is not a fork and not its own Layer 1. It is a child of Ethereum, a Layer 2 that settles back to ETH and borrows its security. Its siblings are the other zkEVM rollups: zkSync, Polygon zkEVM, Linea, and Taiko.
π§ Meet other friends
β FAQ
- What is Scroll (SCR)?
- Scroll is an Ethereum Layer 2 built as a zk-rollup. It runs Ethereum apps off the main chain to make them cheaper and less crowded, then posts a zero-knowledge proof back to Ethereum so the main chain can trust the result without redoing the work.
- What does zkEVM mean?
- zkEVM means Scroll's engine behaves like Ethereum's own engine, all the way down to the bytecode. Because it is EVM-equivalent, existing Ethereum smart contracts and tools run on Scroll without rewriting any code.
- Is there a fixed cap on SCR like Bitcoin?
- No. SCR has a total supply of 1 billion tokens, but it is a governance-token supply that unlocks on a schedule into about 2028, not a frozen scarce cap like Bitcoin's 21 million. The amount in circulation rises over time as more tokens vest.
- What is the SCR token for?
- SCR is a governance token: holders vote on how the protocol is run. As the network decentralizes, it is planned to also carry proving and sequencing rights, so the community can reward outside parties who run provers and sequencers. (Information only, not investment advice.)
β οΈ Not investment advice. All figures are for information only