The first blockchain indexer to prove correctness and completeness. Verifiable on-chain.
- Tweets 138
- Following 38
- Followers 101
- Likes 82
Willow retweeted
With The Graph or Dune, you trust that the data was indexed correctly.
With Willow, you get a proof that shows:
- Every event is really on-chain
- No events were missed
- Every value computed from the events is correct
And your smart contract can verify the proof itself 🤝
1
4
54
Major upgrade!
Willow now supports Arbitrum One, Robinhood Chain, OP Mainnet, Unichain, and Ink, in addition to Ethereum and Base.
Contracts on each chain can now act on data from all others trustlessly 🤝
@arbitrum @RobinhoodCrypto @Optimism @unichain @inkonchain
3
3
14
587
Almost every crypto application you use runs on a blockchain indexer.
An indexer reads every block and turns the raw on-chain data into something actually useful.
Billions of dollars move on that data every day, and almost all of it is taken on trust 👇
2
2
12
376
That's why we built Willow, the first cryptographically verifiable blockchain indexer.
We index blocks and prove that the data is correct, and most importantly, complete. No missing events.
You don't trust the indexer, you verify it, right in your app.
1
3
42
Our proofs are verified on Ethereum, so smart contracts can now act on indexed data trustlessly too.
Come build with us willow.tech
2
31
ZK is becoming the foundation and Willow proves the indexing layer.
Vitalik: Ethereum is Becoming More Than a Blockchain
Speaking at the 2026 Shanghai Blockchain International Week, Ethereum co-founder Vitalik Buterin shared a broader vision for where Ethereum is heading.
His main point: Ethereum is evolving from a blockchain that executes everything into a global system focused on computation, privacy and verification.
Here are the key ideas:
1/ ZK is becoming the foundation → Instead of every node doing the same computation, users or other systems can do the work and generate a proof. Ethereum only needs to verify that proof.
2/ Privacy becomes programmable → Vitalik said blockchain is moving beyond simply answering “Who can send what?” The next question is “Who can see what?” This means applications could control which information is visible without exposing everything publicly.
3/ Scaling through proofs → Complex computations can be split, processed in parallel and compressed into proofs before being verified on Ethereum. This could allow much more computation without putting all of it directly on-chain.
4/ Ethereum becomes a full pipeline → Vitalik described a future involving user devices, private transaction pools, multiple participants, block construction, L2s and finally Ethereum for verification. Ethereum does not need to perform every step itself.
5/ AI changes development → AI can help developers write, test and formally verify increasingly complex cryptographic systems. Vitalik believes this can make advanced Ethereum infrastructure both faster to build and more secure.
6/ Quantum resistance matters → Ethereum is also moving toward quantum-safe cryptography, with STARK-based systems playing an important role in the longer-term roadmap.
Ethereum's future may not simply be about making the L1 faster.
It is about building a trust layer where computation can happen anywhere, privacy can be programmed, and complex results can be mathematically proven and verified on-chain.
2
11
246
Willow brings data from all supported chains together in one place, with cryptographic proof that it's indexed correctly.
Verifiable anywhere.
Check out the block explorer here 👇
explorer.willow.tech/?s=2
1
1
5
215
Willow retweeted
@zsfelfoldi gets it. EIP-8304 (Trustless Log Index) is massively undervalued.
Verifiable data access is a huge weak spot for crypto, and as financial institutions come onchain, it'll become glaring.
@willow_protocol is happy to build a verifier for it.
ethresear.ch/t/scaling-ether…
1
1
5
118
Since KelpDAO's $292M bridge hack in April, six more bridges have been hacked in roughly the same way.
No keys were stolen. Each bridge paid out on an event that never actually happened on the other chain.
They lost about $31M altogether, and all six were Willow-preventable.👇
In April, KelpDAO's bridge was hacked for $292M.
The attacker didn't steal a key or break a contract. They fed a verifier a fake view of Unichain, and it confirmed a tx that never actually happened.
Still, that's how most bridges, oracles, and indexers read the chain today 👇
2
7
566
- Across, under $4M: its relayer took Solana deposit logs from failed transactions as real.
- Coreum, 200,000 XRP: 17 of 28 relayers signed against transfers that never reached the bridge.
- Allbridge, $190K: a Circle-signed message claiming a Polygon burn that never happened.
1
4
50
All of these had signatures or relayers in front of them and still paid out on something that wasn't there.
Willow proves its data against the underlying chain's commitment, so it only passes if the deposit is real.
Moving money on indexed chain data?👇 willow.tech
3
19
Ethereum has trustless execution.
Its data layer should be trustless too.
That's why we're excited about EIP-8304, proposed by @zsfelfoldi.
Today, proving that a query over Ethereum's history is correct and complete means reconstructing that proof from receipts.
EIP-8304 adds authenticated log and transaction indexes at the protocol level, making those proofs far more efficient.
That gives verifiable indexers like Willow a much better starting point: Ethereum commits to the data, and we build larger provable indexes on top.
It makes verifiable indexing cheaper and simpler while keeping the heavier indexing work out of the protocol.
That's a win for Ethereum, indexers, and the applications relying on them.
To help move the EIP forward, we've built and open sourced a proof of concept for its off-protocol side.
On real Ethereum data, we merged four 256-block tables covering 3.45M entries into a proven 1,024-block table for $1.94, with the proof costing 273K gas to verify.
That's already a practical cost profile for an unoptimized implementation.
Repo + measurements 👇
github.com/willow-network/ei…
1
1
8
565
AI finds bugs faster than they get patched.
It’s more important now than ever to verify the data your protocol runs on, rather than trusting it.
With Willow, every result comes with a proof that it’s complete and correct, verifiable onchain.
Cyber is having a moment
Across 21 major software companies, including Apple, AWS, Microsoft, and Google:
- Reported critical vulnerabilities never cleared 100 per month in four years
- Since spring they've jumped to over 600 per month
Charts of the Week: a16z.news/p/chart-of-the-wee…
1
1
4
324
See how Nomad, BNB Chain, and Hyperbridge lost $750M to exactly this kind of bug, and what a proof has to be anchored to so it can’t happen 👇
willow.tech/blog/how-three-b…
3
103
In April, KelpDAO's bridge was hacked for $292M.
The attacker didn't steal a key or break a contract. They fed a verifier a fake view of Unichain, and it confirmed a tx that never actually happened.
Still, that's how most bridges, oracles, and indexers read the chain today 👇
1
1
8
638
Full write-up, including how the attack worked and the other bridges that lost money the same way 👇
willow.tech/blog/how-kelpdao…
1
2
34