10,000 decoded on-chain events from Ethereum Sepolia testnet, extracted directly from the P2P network using Fused Semantic Execution (FSE) - a zero-RPC, zero-full-node signal extraction engine.

This is a free sample. The full dataset covers 76M+ signals across 12M+ blocks on Sepolia alone. Mainnet extraction is underway (genesis-to-tip). Full datasets available at deltazerolabs.dev.

What's In This Sample

Signal Type	Count	Description
`ERC721_Transfer`	9,132	NFT transfers (also includes ERC20 transfers - same topic0)
`ERC20_Approval`	707	Token spend approvals
`WETH_Deposit`	55	ETH to WETH wrapping events
`Chainlink_AnswerUpdated`	48	Oracle price feed updates
`Arb_Swap_V2`	17	Uniswap V2 swaps
`Arb_Sync_V2`	14	Uniswap V2 reserve syncs
`Arb_Swap_V3`	10	Uniswap V3 swaps
`Bridge_LayerZero_Packet`	7	Cross-chain bridge messages
`WETH_Withdrawal`	7	WETH to ETH unwrapping
`Bridge_Wormhole_LogMessagePublished`	2	Wormhole bridge events
`DAO_VoteCast`	1	Governance vote

Block range: 1,394,316 to 7,700,283 | 25 columns | 1.5 MB parquet

Schema

block_number        int64       Block height
block_hash          string      Block hash
timestamp           int64       Unix timestamp
tx_hash             string      Transaction hash
tx_index            int64       Position in block
from_address        string      Transaction sender
to_address          string      Transaction recipient
gas_price           int64       Gas price (wei)
gas_used            int64       Gas consumed
value               int64       ETH value transferred (wei)
log_index           int64       Log position in receipt
contract_address    string      Emitting contract
signal_type         string      Classified event type
topic0              string      Event signature hash
topic1-topic3       string      Indexed event parameters
data                string      Non-indexed event data (hex)
decoded_data        string      Human-readable decoded parameters
chain_id            int64       Chain identifier
created_at          string      Extraction timestamp

Quick Start

import pandas as pd

# Load directly from Hugging Face
df = pd.read_parquet("hf://datasets/MikeKuykendall/ethereum-signals-sample/data/sepolia-sample-mixed.parquet")

# All Uniswap V2 swaps
swaps = df[df["signal_type"] == "Arb_Swap_V2"]

# Oracle price updates
oracles = df[df["signal_type"] == "Chainlink_AnswerUpdated"]

# NFT transfers for a specific contract
nfts = df[(df["signal_type"] == "ERC721_Transfer") & (df["contract_address"] == "0x...")]

How This Data Was Extracted

Unlike RPC-based indexers (Dune, The Graph, Alchemy), this data was extracted directly from Ethereum's P2P network using a custom devp2p client. No RPC rate limits. No API keys. No full node required.

The extraction engine uses Fused Semantic Execution (FSE) - a technique that scans raw receipt logs against multiple signal patterns in a single O(1) pass, classifying events as they stream off the wire.

What makes this different:

Zero RPC dependency - connects directly to Ethereum peers via devp2p/ETH68
Pre-decoded signals - events are classified and decoded at extraction time
Multi-signal in one pass - DEX swaps, oracle updates, bridge events, governance - all extracted simultaneously
Minimal storage - only signals are kept, raw blocks are discarded

Full Dataset Available

This sample is 0.013% of the Sepolia dataset. The full extraction includes:

Product	Signals	Size
NFT Transfers (full)	~45M events	10.9 GB
ERC20 Approvals (full)	~8M events	1.8 GB
DEX Activity (full)	~1.2M events	172 MB
WETH Wrapping (full)	~900K events	177 MB
Oracle Price Feeds (full)	~500K events	95 MB
Bridge Events (full)	~150K events	24 MB
Governance (full)	~5K events	935 KB
Total (Sepolia)	76M+ signals	13.2 GB

Mainnet extraction (genesis to tip) is currently running.

Get the full dataset at deltazerolabs.dev

Use Cases

MEV Research - Cross-reference swap events with mempool data to study arbitrage patterns
DeFi Analytics - Track oracle updates, liquidity events, and bridge flows across time
ML Training - Labeled on-chain events ready for time-series models and anomaly detection
Academic Research - CC-BY-NC licensed, citation-friendly, parquet format

License

This sample is released under CC BY-NC 4.0. Free for research, education, and non-commercial use. For commercial licensing of the full dataset, visit deltazerolabs.dev.

Citation

@dataset{kuykendall2026ethereum,
  title={Ethereum On-Chain Signals Dataset},
  author={Kuykendall, Michael Allen},
  year={2026},
  publisher={Delta Zero Labs},
  url={https://deltazerolabs.dev}
}

Built by Delta Zero Labs | Extracting alpha from the wire.

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