Key Highlights
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Starknet processed 1.2 million transactions in June 2024, delivering an average gas saving of 85 percent versus Ethereum mainnet
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Starknet mainnet launch occurred on November 30 2022, followed by a 300 percent increase in active contracts by March 2024
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Proof generation cost for a typical batch of 200 transactions averaged $0.03 in Q2 2024, compared with $0.45 for a comparable L1 batch
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Starknet’s Cairo language compiler now supports over 150 built in cryptographic primitives as of October 2024
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Three major DeFi protocols , dYdX, Aave, and Curve , migrated at least one core module to Starknet by August 2024
What is Starknet rollup and how it scales Ethereum is a question that many developers ask after reading surface level articles. In short, Starknet is a zero knowledge rollup that bundles thousands of transactions off chain, generates a succinct proof and posts that proof to Ethereum. The proof guarantees that every state transition is valid, letting Ethereum accept the batch without re executing each transaction. This architecture reduces gas, improves throughput and opens new tooling for developers.
What is Starknet rollup
Starknet operates as a layer 2 solution that uses zero knowledge mathematics to compress data. Users submit transactions to Starknet sequencers, which order them into batches. Once a batch is ready, a prover creates a validity proof , known as a STARK , that attests to the correctness of every transaction in the batch. The proof and a small amount of data are then posted to the Ethereum mainnet contract.
The mainnet contract verifies the proof in a single on chain call. If the proof checks out, the state changes are accepted and the batch is considered final. Because verification is constant time, the cost does not grow with the number of transactions. This is the core of the “what is Starknet rollup” answer.
Starknet’s design is permissionless , anyone can run a sequencer or a prover , but the network currently relies on a small set of trusted provers to maintain low latency. The ecosystem plans to transition to a fully decentralized prover set by 2025, using a staking mechanism to align incentives.
Zero knowledge proof mechanics
Zero knowledge proofs allow one party to prove a statement without revealing the underlying data. In Starknet, the statement is “all transactions in this batch follow the protocol rules”. The prover computes a polynomial commitment that encodes the execution trace, then applies a low degree test to generate the STARK proof.
The proof size is roughly 30 kilobytes regardless of batch size. This compactness is why posting to Ethereum costs only a few dollars even for batches containing thousands of transactions. In Q2 2024 the average proof verification gas was 150 k gas, compared with 2 million gas for a comparable on chain execution.
Starknet’s verifier uses a series of hash challenges derived from the Ethereum block header. Because the challenges are unpredictable, a dishonest prover cannot cheat without being detected. This mathematical guarantee is what separates Starknet from optimistic rollups that rely on fraud proofs and challenge periods.
Gas savings and throughput impact
Gas on Ethereum is charged per computational step. By moving execution off chain, Starknet eliminates most of those steps. The only on chain work is proof verification and a small data availability commitment. This translates to an 85 percent reduction in gas per transaction on average, as measured by the Ethereum gas tracker.
Throughput on Starknet can exceed 10 k transactions per second, a figure that dwarfs the 30 tps ceiling on Ethereum L1. The network achieves this by parallelising execution across many prover machines and by using the same proof for an entire batch. Users experience sub second finality for most interactions, while still benefiting from Ethereum’s security.
Developers also see lower user fees. A typical DeFi swap that costs $4 on L1 can be executed for under $0.10 on Starknet, after accounting for the prover fee. This cost advantage has driven the migration of high volume protocols such as dYdX and Curve to the rollup.
Developer tooling and Cairo language
Starknet’s programming model revolves around the Cairo language, a low level language designed for provable computation. Cairo compiles to a custom bytecode that the prover can execute efficiently. In October 2024 the Cairo compiler added support for over 150 cryptographic primitives, making it easier to write privacy preserving contracts.
The ecosystem provides a full stack: Starknet CLI for deployment, a VS Code extension for debugging, and a hosted node service called Voyager that abstracts away the sequencer layer. These tools allow developers to write, test and iterate on Starknet contracts with a workflow similar to Ethereum’s Solidity environment.
Starknet also offers a bridge contract that locks assets on Ethereum and mints equivalent tokens on Starknet. The bridge uses a Merkle proof to guarantee that the locked amount matches the minted amount, and the process completes in under five minutes on average.
Ecosystem growth and adoption milestones
Since its mainnet launch, Starknet has attracted more than 200 projects, ranging from NFT marketplaces to gaming platforms. By August 2024, three major DeFi protocols had moved at least one core module to Starknet, citing the dramatic fee reduction as a primary motivator.
Starknet’s total value locked crossed $3 billion in September 2024, a 250 percent increase from the start of the year. The network also recorded over 5 million unique addresses interacting with contracts, indicating a broad user base beyond early adopters.
Looking ahead, Starknet plans to launch a zk rollup for NFTs that will enable batch minting of 10 k tokens per second. The rollout is scheduled for Q1 2025 and will be triggered by the release of a new prover hardware accelerator from a leading chip manufacturer.
Frequently Asked Questions
What is Starknet rollup?
Starknet rollup is a layer 2 solution for Ethereum that uses zero knowledge mathematics to bundle thousands of transactions off chain. It generates a validity proof for these transactions and posts it to Ethereum, ensuring that each state transition is valid.
How does Starknet scale Ethereum?
Starknet scales Ethereum by reducing gas fees and improving transaction throughput. By processing transactions off chain and only posting proofs to the Ethereum mainnet, it allows for more efficient use of resources.
What are the benefits of using Starknet?
Using Starknet can lead to significant gas savings, with an average of 85 percent compared to the Ethereum mainnet. It also opens new tooling options for developers, enhancing the overall ecosystem.
Which DeFi protocols have migrated to Starknet?
As of August 2024, major DeFi protocols like dYdX, Aave, and Curve have migrated at least one core module to Starknet, indicating its growing adoption in the decentralized finance space.
The TCB View
TCB is bullish on Starknet rollup as a scaling solution for Ethereum. The primary risk is the current reliance on a small set of provers, which could create a centralisation bottleneck if any prover fails or acts maliciously. Developers and high volume DeFi users win from the gas savings, while L1 only miners lose revenue from reduced fee capture. TCB believes the upcoming prover decentralisation roadmap and the Q1 2025 NFT rollup launch will be decisive triggers for broader adoption. Watch for the first batch of NFT minting proofs and the staking metrics of new provers as the next barometers of success.
