The future of Ethereum scaling is no longer a distant dream—it’s unfolding in real time on Polygon. With the launch of the final testnet for Polygon zkEVM, developers and users alike are getting a firsthand look at what next-generation blockchain scalability truly looks like. This isn’t just another incremental update; it’s a pivotal step toward mainnet, packed with groundbreaking upgrades that redefine performance, efficiency, and user experience.
Polygon has long championed a community-driven, transparent development model, and this testnet is no exception. Researchers are inviting the global Ethereum community to engage deeply—exploring open-source code, stress-testing systems, and validating liveness in real-world conditions. The goal? To ensure that when Polygon zkEVM goes live on mainnet, it does so with unmatched security, speed, and decentralization.
The Road to Mainnet: What’s New in the Final Testnet?
Following the successful rollout of the first public testnet, Polygon has introduced a significantly upgraded version—representing what is essentially the final form of the zkEVM before mainnet deployment. While bug fixes from ongoing audits may still refine the system, this testnet delivers core functionality that mirrors the intended production environment.
Key improvements include:
- Recursive proof aggregation enabling exponential scalability
- Proof generation under 4 minutes (down from 10)
- Batch gas capacity increased from 4M to 10M
- Support for pre-EIP-155 transactions, unlocking compatibility with popular contracts like Gnosis Safe
These aren’t just technical checkboxes—they represent tangible leaps in usability, cost-efficiency, and throughput that directly benefit end users and developers building on Ethereum.
Why Recursion Changes Everything
At the heart of this upgrade is recursion, a pioneering implementation in the context of zkEVMs. Traditionally, each batch of transactions required a single validity proof. While efficient, this linear model limits scalability potential.
With recursion, Polygon zkEVM now enables one ZK proof to verify multiple other proofs—each of which can validate dozens or hundreds of transactions. This creates a cascading effect: proofs within proofs, dramatically reducing the on-chain verification burden.
Think of it as compressing not just data, but trust itself. Instead of submitting hundreds of individual proofs to Ethereum, the system aggregates them recursively into a single, succinct proof. This means:
- Lower transaction fees
- Faster finality
- Reduced congestion on Layer 1
It’s no exaggeration to say recursion brings us closer to the "Holy Grail" of blockchain scaling: achieving massive throughput without sacrificing security or decentralization.
👉 See how recursive proof systems are revolutionizing Layer 2 performance—click to dive deeper.
Speed and Cost: Proving Efficiency Matters
Speed matters—especially when users expect near-instant confirmations and minimal fees. In the previous testnet, proof generation took around 10 minutes. Now, thanks to an optimized prover architecture and parallelized proving infrastructure, proofs are generated in under 4 minutes.
This improvement isn’t just about faster confirmations. It directly translates into lower operational costs, which are passed on to users. Current estimates place transaction fees at less than $0.04, among the lowest in the ZK-Rollup space.
But Polygon isn’t stopping here. Ongoing research focuses on further optimizing the sequencer, improving circuit design, and enhancing hardware utilization—all aimed at driving costs even lower in the months ahead.
Doubling Throughput with Batch Aggregation
Another major leap comes from enhanced batch aggregation. Inside Polygon zkEVM, the sequencer collects transactions and bundles them into batches for processing by the zkProver. The final testnet introduces critical optimizations to this pipeline:
- Improved binary state machine logic
- Enhanced Keccak hashing for faster signature verification
- Upgraded zkROM for better arithmetization and batch capacity
As a result, the gas limit per batch has more than doubled—from 4 million to 10 million. This means more transactions per batch, fewer batches on Ethereum, and significantly reduced overhead.
For developers deploying dApps, this translates to smoother user experiences and predictable gas costs. For the network as a whole, it means higher scalability without compromising security.
New Functionality: Support for Pre-EIP-155 Transactions
One often-overlooked but crucial upgrade is support for pre-EIP-155 signed transactions. This change enables compatibility with widely used smart contract wallets like Gnosis Safe, which rely on older signing standards.
Previously, such wallets couldn’t interact seamlessly with zkEVM environments due to signature format mismatches. Now, with ROM-level enhancements and updated verification logic, Polygon zkEVM removes this barrier—opening the door for broader institutional and enterprise adoption.
This may seem like a small detail, but in practice, it ensures continuity with existing tooling and workflows—a key factor in driving real-world usage.
Migrating to the Final Testnet
Note: The initial version of the Polygon zkEVM testnet was deprecated on January 5. All users must migrate to the new environment.
Switching is simple—existing wallets only need to update their network configuration:
- Network Name: Polygon zkEVM Testnet
- ChainID: 1422
- RPC URL: https://rpc.public.zkevm-test.net
- Currency Symbol: ETH
- Block Explorer URL: https://explorer.public.zkevm-test.net
To connect:
- Visit the Bridge URL
- Click “Add to Metamask”
- Confirm settings and start testing
For access to legacy data or tools from the old testnet, use deprecated.zkevm-test.net for URL redirection.
Additional resources for developers:
- Bridge API: https://bridge-api.public.zkevm-test.net/
- Broadcast gRPC: public-grpc.zkevm-test.net:61090
Frequently Asked Questions (FAQ)
Q: What makes this testnet “final” before mainnet?
A: This version includes all major architectural upgrades planned for mainnet, including recursive proof aggregation, optimized proving times, and expanded batch capacity. While audits may prompt minor fixes, no further large-scale changes are expected.
Q: How does recursion improve scalability?
A: Recursion allows one ZK proof to verify multiple other proofs, creating a hierarchical structure that drastically reduces the number of proofs posted to Ethereum. This leads to lower fees and higher throughput.
Q: Why was support for pre-EIP-155 added?
A: Many widely used contract wallets (like Gnosis Safe) use older transaction signing formats. Adding support ensures compatibility with existing infrastructure and broadens adoption.
Q: Are transaction fees really under $0.04?
A: Yes—current benchmarks show average fees below $0.04 per transaction, thanks to efficient batching and proof compression. Ongoing optimizations aim to reduce this further.
Q: Do I need a new wallet to use the final testnet?
A: No. You can use your existing Ethereum wallet (e.g., MetaMask) by simply updating the network settings (ChainID 1422).
Q: Where can I find documentation and developer tools?
A: Visit the official Polygon ZK Forum and Polygon Blog for technical deep dives, updates, and community discussions.
The Path Forward
Even with these impressive advances, Polygon’s research team continues refining the system—focusing on sequencer efficiency, circuit optimization, and hardware acceleration. All future upgrades will be seamless to users, ensuring continuous improvement without disruption.
As Ethereum’s ZK future takes shape, Polygon zkEVM stands at the forefront—not just as a technical achievement, but as a testament to open collaboration and community-powered innovation.
Core Keywords: Polygon zkEVM, ZK scaling, recursive proof, Layer 2 blockchain, Ethereum scaling, zero knowledge proof, batch aggregation, testnet upgrade