EigenLayer’s reward events
Every reward event across eight consecutive mainnet blocks, proven indexed with nothing left out and anchored to the canonical chain.
8 blocks · 0 omissions · 0.000018 ETH gas
Live with partners
The first cryptographically verifiable indexer.
Every other index is trusted. Willow’s is proven, checked against the chain itself.
Why indexers
$292MLost in April 2026 when a bridge verifier trusted an RPC’s view of the source chain.The incident reportThe problem.
Almost nothing on Ethereum reads the chain directly. Wallets, dashboards, reward programs, and bridges ask an indexer and trust the answer.
When the answer is wrong, nothing catches it. A dropped event pays the wrong reward. A false view of the chain clears a bridge transfer. The money moves either way.
The guarantees
What Willow proves.
Three guarantees on every dataset it serves.
01 / Inclusion
Every record is on the chain.
Each event Willow serves is checked against Ethereum itself. Nothing is invented.
02 / Completeness
No record is left out.
There is no valid proof that drops a matching event.
03 / Transformation
Every derived value is correct.
Sums and derived tables provably follow from the verified events.
The receiptsEigenLayer · Jul 2026 Lido · Aug 2026 Merkl · Aug 2026
Verified on Ethereum.
Three proofs, each checked by a contract on mainnet. The transactions are public.
Lido’s staked balance
Every one of Lido’s 488,374 registered validator keys, accounted for in one transaction.
488,374 keys · 8,793,794 ETH · 0 unaccounted
The data behind a live Merkl campaign
Every Uniswap v4 pool event across eight mainnet blocks, proven with none missing. A live Merkl rewards campaign settles from them.
79 events · 0 missing · 0.0000146 ETH gas
Under the hood
The proof.
When an index silently drops an event, the wrong number goes through like any other. So every block Willow indexes is proven as it’s indexed, and validators verify each proof before the data is served.
EthereumEvery block
Binius64Per-block proof
at the tipVerified by the network
recursionOne aggregate proof
~300k gasVerified on Ethereum
Windows of blocks then collapse into one proof a contract on Ethereum checks. Per-block proofs make it trustless, aggregation makes it cheap, and the network makes it fast.
In production
Live with our first partner, YieldNest.
Every chart on yieldnest.willow.tech is backed by indexed events you can audit yourself.
Willow verifiedGet involvedPartners Community Network
Work with us.
We’re working with a small number of partners right now, and the team is easy to reach.
Talk to us
We work with protocols that move money on indexed data: reward programs, distributions, oracles, bridges. Tell us what you’re settling and we’ll put proven data under it.
info@willow.techJoin the Discord
Early users, contributors, and partners hang out in our Discord. Ask questions, share what you're building, and get direct access to the team.
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Blocks, validators, and the proof attached to every indexed block, live in the explorer.
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