What is Storylus?

Storylus is a permissionless Protocol that gives smart contracts access to all of Ethereum’s historical data with storage proofs by Proving Ethereum’s chain of block.

Why Storylus ?

There is no native way to access historical state on Ethereum in a trustless way. Over 19 million blocks written to Ethereum. Smart contracts can only access the latest 256 blocks representing ~50 minutes of data. ‘Historical data’ refers to anything outside of the last 256 blocks.

Deployed contracts

Arbitrum Sepolia	Arbitrum Stylus Testnet
ClaimNFT	HistoryProver
NFT

Uses cases examples

• Confirm past user asset ownership
• Proof of usage of a protocol
• bypass the need for bridging
• …

Code Highlights

• History Prover Smart Contract
• Rust Bot to fill L1 Data
• Claimer (proofs verifier)
• Hasher Lib (Recover Signer from Tx)
• TX Trie implementation
• Demo Frontend and NFT

Protocol Usage Demo

The demo is a Capture the (nft) Flag The NFT is transferred only if an address proves on-chain that it has made more transactions than the current NFT owner during EthDenver More than 256 Blocks in the past

• Code
• Live Demo

How it works

Protocol overview

1- Push a L1 Block Header to l3 in a trustless way

2- Recursively prove previous blocks

3- All networks that have access to the L3 Rollup state can now attest the validity of a L1 block.

Context

This project was developed during the EthDenver 2024 hackathon