Base, Blast, Scroll: New L2s Compared

1. Introduction

Ethereum's base layer settles roughly 15 transactions per second under typical block utilization, with gas fees that spike to double-digit dollars during periods of network congestion. For developers building consumer-grade applications, DeFi protocols, or on-chain games, this throughput ceiling is a non-starter. Layer 2 rollups have emerged as the dominant scaling primitive, inheriting Ethereum's security while batching execution off-chain.

Three relatively new entrants — Base, Blast, and Scroll — each take meaningfully different architectural positions. Base, incubated by Coinbase, is an Optimism Stack rollup optimized for fiat onboarding and consumer reach. Blast bundles native yield into the L2 itself, restaking deposited ETH and stablecoins via off-chain protocols. Scroll is a zkEVM, pursuing bytecode-level equivalence with the EVM using validity proofs rather than fraud proofs.

This article walks through the scaling problem these chains address, dissects their technical architectures, and compares their performance characteristics, ecosystems, developer experience, trade-offs, and roadmaps. The goal is to help engineers decide which environment fits a given workload — not to crown a winner.

2. The Scaling Challenge

Ethereum L1 imposes a hard ceiling derived from its 30M-gas block target and 12-second slot time. A simple ERC-20 transfer consumes ~21,000 gas, but a Uniswap V3 swap can exceed 180,000. The result is a chain that processes single-digit-to-low-double-digit TPS in practice, with fee markets that price out micro-transactions during periods of demand.

The trilemma framing — that a chain optimizes at most two of decentralization, security, and scalability — is widely cited but somewhat reductive. Rollups partially escape it: they push execution off-chain (gaining scalability) while still posting state commitments and data to L1 (inheriting security and, transitively, decentralization). The remaining trade-off shifts to:

• Data availability (DA): every state transition must be reconstructible. Posting calldata or blobs to L1 is expensive; off-chain DA committees are cheaper but introduce trust assumptions.
• Proof system: optimistic rollups assume validity unless challenged within a window (typically 7 days). ZK rollups submit succinct cryptographic proofs that the state transition is correct.
• Sequencer decentralization: virtually every production rollup, including the three discussed here, runs a single sequencer today. This is a liveness and censorship-resistance concern, even if security (the validity of state) is preserved by L1.

EIP-4844 (proto-danksharding, March 2024) introduced blob-carrying transactions, dropping rollup DA costs by an order of magnitude. All three chains examined here consume blobs, which is the largest single reason their per-transaction costs have collapsed since 2024.

3. Technical Architecture

Base

Base is an Optimism Stack (OP Stack) rollup. Its execution client is op-geth (a minimally forked go-ethereum), and its consensus/derivation layer is op-node. Blocks are produced every 2 seconds by a centralized sequencer operated by Coinbase. Transactions are batched and posted to Ethereum as 4844 blobs by the op-batcher; state root commitments are posted by the op-proposer to the L2OutputOracle contract on L1.

Security relies on fault proofs: any party can challenge a posted output during the 7-day challenge window. The OP Stack's permissionless fault proof system (FPVM/Cannon) is live, but the dispute game is still operated under a Security Council multisig that can intervene in edge cases.

A canonical L1→L2 deposit flow:

// L1: send ETH and arbitrary calldata to L2 contract
IOptimismPortal(portal).depositTransaction{value: 1 ether}(
    target,      // L2 recipient
    1 ether,     // value
    100_000,     // gas limit
    false,       // isCreation
    hex""        // data
);

The deposit is included on L2 after one L1 confirmation (~12s minimum, ~3min typical). Withdrawals require an L2 burn, a state root posting, and the 7-day challenge period before assets unlock on L1.

Blast

Blast is also an optimistic rollup forked from the OP Stack, but its differentiator is native yield. Bridged ETH is automatically restaked through Lido (so ETH on Blast rebases like stETH), and bridged stablecoins are deployed into MakerDAO's T-Bill–backed DAI savings rate, then represented on L2 as USDB. The L2 itself exposes yield to contracts via a YieldMode configuration per account:

enum YieldMode { AUTOMATIC, VOID, CLAIMABLE }

interface IBlast {
    function configureYieldMode(YieldMode mode) external;
    function claimYield(address recipient, uint256 amount) external returns (uint256);
}

Contracts that hold significant ETH balances (DEX pools, lending markets) can either auto-rebase or explicitly claim accrued yield. This is enforced at the protocol level via modified precompiles, not by an external token contract.

Bridge mechanics, sequencer model, and fault proof status mirror the OP Stack baseline. Importantly, Blast's yield depends on the solvency of Lido and MakerDAO — these are additional trust surfaces relative to a vanilla rollup.

Scroll

Scroll is a zkEVM targeting bytecode-level EVM equivalence. Each batch of L2 blocks is proved by a zkSNARK proof system over a halo2-based circuit, with a Plonk-style aggregation layer producing a final proof verified by an L1 contract.

The pipeline:

1. Sequencer orders transactions and produces L2 blocks.
2. Coordinator dispatches the resulting execution trace to a pool of provers (GPU instances).
3. Provers generate proofs for sub-circuits (storage, EVM, MPT, etc.) which are aggregated.
4. The final proof and state commitment are submitted to the ScrollChain contract on L1.

Because state transitions are cryptographically verified, Scroll has no challenge window. L1→L2 deposits finalize after one L1 block; L2→L1 withdrawals finalize as soon as the batch containing the withdrawal is proved and verified on L1 — typically under an hour, often much less.

Data availability is on Ethereum L1 via 4844 blobs. The security model assumes the soundness of the proving system and the SNARK verifier contract; there is no fraud-proof game, but also no need for a watchtower network.

4. Performance Metrics

Real-world performance (rolling 30-day averages, mid-2024 onward):

Metric	Base	Blast	Scroll
Median TPS (observed)	50–110	5–20	3–10
Theoretical TPS ceiling	~2,000	~2,000	~500 (prover-bound)
Block time	2s	2s	~3s
L1 soft finality	~3 min	~3 min	~30 min (proof)
L1 hard finality	~7 days	~7 days	~30 min
Median tx cost (simple transfer)	$0.01–$0.05	$0.01–$0.04	$0.05–$0.20
DA layer	Ethereum (blobs)	Ethereum (blobs)	Ethereum (blobs)

Caveats: TPS figures reflect actual usage, not headroom. Base regularly leads non-Ethereum chains in absolute transactions per day because of its Coinbase-driven user inflow, not because its architecture is inherently faster than Blast's. Scroll's proving cost is the dominant component of its per-transaction fee and explains its higher floor; this is expected to drop as the prover stack matures.

Compared to incumbents: Arbitrum and Optimism sit in the same optimistic-rollup performance band as Base and Blast. zkSync Era, Linea, Polygon zkEVM, and Starknet are Scroll's peer set on the validity-proof side. Among zkEVMs, Scroll is closest to a Type-2 (bytecode-equivalent) implementation; zkSync Era is Type-4 (compiles Solidity to a different VM), which has migration implications discussed below.

5. Ecosystem & Adoption

Base has the deepest mainstream adoption of the three. Its TVL has consistently ranked in the top tier of L2s since mid-2024, driven by Aerodrome (a Velodrome fork that became the dominant DEX), Uniswap, Aave, and a long tail of consumer apps including Farcaster's Frames ecosystem. The Coinbase wallet integration removes the typical fiat-onramp friction.

Blast had an unusual launch: it gated deposits behind a referral-based points program for several months before opening withdrawals. This produced a TVL spike — over $2B at peak — followed by a significant unwind after the token airdrop in mid-2024. Its persistent ecosystem is smaller than Base's but includes Thruster (DEX), Blur's perpetuals product, and several yield-aggregator forks. Native yield remains its primary developer pitch.

Scroll's ecosystem is smaller still in TVL terms but includes serious DeFi deployments: Aave, Compound, Pendle, Ambient, and several derivatives venues. Its NFT and consumer footprint is thin compared to Base.

Developer activity (commits, deployed contracts, verified contract counts) tracks roughly with TVL: Base > Blast > Scroll, with the caveat that Scroll's contract verifications skew toward more sophisticated DeFi primitives.

6. Developer Experience

All three chains expose a standard Ethereum JSON-RPC interface and accept transactions signed by any EVM wallet. Hardhat, Foundry, and Viem/Ethers all work without modification:

forge create --rpc-url https://mainnet.base.org \
  --private-key $PK \
  src/MyContract.sol:MyContract

Swap the RPC URL for https://rpc.blast.io or https://rpc.scroll.io and the same command deploys to the other chains.

EVM equivalence levels:

• Base / Blast: OP Stack achieves near-perfect equivalence. A handful of opcodes behave subtly differently (BLOCKHASH semantics, COINBASE returning the sequencer address, lack of true SELFDESTRUCT post-Cancun-equivalent fork). For ~99% of contracts, no code changes are required.
• Scroll: zkEVM imposes additional constraints. A small number of precompiles are not yet supported or have gas-cost differences (RIPEMD-160, blake2f historically). Contract size limits, modexp behavior, and certain edge-case opcodes can require adjustment. The Scroll docs maintain a current compatibility list — check it before deploying anything that exercises precompiles or non-standard opcodes.

Infrastructure:

• RPC providers (Alchemy, Infura, QuickNode, Ankr) support all three chains.
• Indexers (The Graph, Goldsky, Envio) have endpoints for all three; Base has the most mature subgraph ecosystem.
• Block explorers: Basescan, Blastscan, Scrollscan — all Etherscan-derived, with similar UX.
• Account abstraction: Base has the broadest bundler/paymaster coverage (Pimlico, Stackup, Biconomy). Blast and Scroll are supported but with fewer paymaster options.

Migration from L1: for typical Solidity contracts targeting Base or Blast, redeployment is the only step. For Scroll, audit any contract that uses unusual precompiles, recursive proof verification, or gas-sensitive logic.

7. Trade-offs & Limitations

Sequencer centralization: all three chains operate a single sequencer. Base's sequencer is run by Coinbase; Blast's by the Blast core team; Scroll's by Scroll Labs. Censorship resistance depends on the force-inclusion mechanism — depositing via L1 — which works but adds a 12-minute-plus delay.

Fault proof maturity: Base has permissionless fault proofs in production, with a Security Council backstop. Blast's fault proof status lags. Scroll's validity proofs sidestep the issue but introduce the equivalent assumption that the verifier contract and trusted setup are sound.

Withdrawal times:

• Base, Blast: 7 days (challenge window). Third-party bridges (Across, Hop, Stargate) offer minute-scale withdrawals at a fee, but these introduce additional trust assumptions.
• Scroll: under an hour for native withdrawals, no third party needed.

Blast-specific: the native yield mechanism couples L2 security to the solvency of Lido (slashing risk on staked ETH) and MakerDAO (T-Bill custodian risk on USDB). A correlated failure in either would impact every Blast user, not just those who opted into yield-bearing positions.

Fragmentation: liquidity is split across these L2s and the broader rollup landscape. Cross-rollup composability remains an open problem; native interop (shared sequencing, atomic cross-rollup messaging) is on roadmaps but not in production.

8. Competitive Landscape

Among optimistic rollups, Arbitrum One still leads on TVL and developer mindshare for DeFi; Optimism anchors the Superchain ecosystem of which Base is part. Base's advantage is distribution — Coinbase's user base — not technology. Blast's advantage is the yield primitive, which no other top-tier L2 ships natively; whether that's a durable differentiator or a feature competitors will replicate (or render obsolete via better integration with restaking) is an open question.

Among zkEVMs, Linea (ConsenSys) and zkSync Era (Matter Labs) compete directly with Scroll. Linea is closer to Scroll in EVM equivalence; zkSync trades equivalence for a more optimized VM. Polygon zkEVM and Starknet round out the field. Scroll's positioning is "the most EVM-equivalent zkEVM in production," which matters if you need confidence that L1-audited contracts behave identically.

A developer choosing today might reasonably pick Base for consumer reach, Blast for yield-coupled DeFi, and Scroll for applications that require minute-scale L1 finality or that handle assets where a 7-day withdrawal window is unacceptable.

9. Roadmap & Future

Base is aligned with the OP Stack's Superchain roadmap: shared sequencing across OP chains, interop messaging, and eventual sequencer decentralization. Fault proof system upgrades to remove Security Council intervention are on the multi-year horizon.

Blast has signaled work on decentralizing the sequencer and on expanding native yield primitives beyond ETH and stablecoins (e.g., LRT integrations). Concrete timelines are sparse.

Scroll is iterating on prover performance — cheaper proofs translate directly into lower fees and faster batches. Longer-term, the team is working on decentralizing the prover network, which would remove the single-prover liveness assumption that currently exists alongside the cryptographic security.

The largest plausible game-changer for all three is full danksharding on L1, which would expand blob capacity by another order of magnitude and push per-transaction fees toward sub-cent levels even at high utilization.

10. Conclusion

Base, Blast, and Scroll occupy three distinct points in the L2 design space. Base trades nothing technically novel for unmatched distribution and a mature OP Stack baseline. Blast bets that native yield is a durable category, accepting additional trust assumptions to deliver it. Scroll bets that validity proofs and EVM equivalence will matter more as the rollup landscape matures.

For consumer apps and broad DeFi: Base. For yield-native protocols willing to inherit Lido/Maker risk: Blast. For applications that benefit from fast finality, lower trust surface, or that may eventually need to compose with other zk-based systems: Scroll. None of these chains is strictly dominant; the right choice depends on which trade-offs your application can absorb.

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Disclaimer: This article was written with AI assistance and edited by the author. It is for informational purposes only and does not constitute financial, investment, or trading advice. Always conduct your own research and consult with qualified professionals before making any investment decisions. Cryptocurrency investments carry significant risk and may result in loss of capital.

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