---
license: mit
language:
  - en
tags:
  - blockchain
  - ethereum
  - erc-8004
  - identity
  - reputation
  - web3
  - events
pretty_name: ERC-8004 On-Chain Events
size_categories:
  - 100K<n<1M
task_categories:
  - other
---

# ERC-8004 On-Chain Events

Raw event logs from [ERC-8004](https://github.com/erc-8004/erc-8004-contracts) Identity and Reputation Registry contracts, archived across all mainnet deployments.

ERC-8004 is an on-chain agent identity and reputation standard. This dataset captures every `IdentityRegistered`, `ReputationUpdated`, and related event emitted since each chain's contract deployment.

## Dataset Structure

Data is organized by EIP-155 chain ID:

```text
<chain_id>/
  identity.parquet    # IdentityRegistry events
  reputation.parquet  # ReputationRegistry events
  cursor.json         # Sync cursor (last synced block)
```

### Covered Chains

| Chain ID | Network         | Identity Contract                            | Reputation Contract                          |
|----------|-----------------|----------------------------------------------|----------------------------------------------|
| 1        | Ethereum        | `0x8004A169FB4a3325136EB29fA0ceB6D2e539a432` | `0x8004BAa17C55a88189AE136b182e5fdA19dE9b63` |
| 10       | Optimism        | `0x8004A169FB4a3325136EB29fA0ceB6D2e539a432` | `0x8004BAa17C55a88189AE136b182e5fdA19dE9b63` |
| 56       | BNB Smart Chain | `0x8004A169FB4a3325136EB29fA0ceB6D2e539a432` | `0x8004BAa17C55a88189AE136b182e5fdA19dE9b63` |
| 100      | Gnosis          | `0x8004A169FB4a3325136EB29fA0ceB6D2e539a432` | `0x8004BAa17C55a88189AE136b182e5fdA19dE9b63` |
| 137      | Polygon         | `0x8004A169FB4a3325136EB29fA0ceB6D2e539a432` | `0x8004BAa17C55a88189AE136b182e5fdA19dE9b63` |
| 143      | Monad           | `0x8004A169FB4a3325136EB29fA0ceB6D2e539a432` | `0x8004BAa17C55a88189AE136b182e5fdA19dE9b63` |
| 2741     | Abstract        | `0x8004A169FB4a3325136EB29fA0ceB6D2e539a432` | `0x8004BAa17C55a88189AE136b182e5fdA19dE9b63` |
| 4326     | MegaETH         | `0x8004A169FB4a3325136EB29fA0ceB6D2e539a432` | `0x8004BAa17C55a88189AE136b182e5fdA19dE9b63` |
| 5000     | Mantle          | `0x8004A169FB4a3325136EB29fA0ceB6D2e539a432` | `0x8004BAa17C55a88189AE136b182e5fdA19dE9b63` |
| 8453     | Base            | `0x8004A169FB4a3325136EB29fA0ceB6D2e539a432` | `0x8004BAa17C55a88189AE136b182e5fdA19dE9b63` |
| 42161    | Arbitrum One    | `0x8004A169FB4a3325136EB29fA0ceB6D2e539a432` | `0x8004BAa17C55a88189AE136b182e5fdA19dE9b63` |
| 42220    | Celo            | `0x8004A169FB4a3325136EB29fA0ceB6D2e539a432` | `0x8004BAa17C55a88189AE136b182e5fdA19dE9b63` |
| 43114    | Avalanche C     | `0x8004A169FB4a3325136EB29fA0ceB6D2e539a432` | `0x8004BAa17C55a88189AE136b182e5fdA19dE9b63` |
| 59144    | Linea           | `0x8004A169FB4a3325136EB29fA0ceB6D2e539a432` | `0x8004BAa17C55a88189AE136b182e5fdA19dE9b63` |
| 167000   | Taiko           | `0x8004A169FB4a3325136EB29fA0ceB6D2e539a432` | `0x8004BAa17C55a88189AE136b182e5fdA19dE9b63` |
| 534352   | Scroll          | `0x8004A169FB4a3325136EB29fA0ceB6D2e539a432` | `0x8004BAa17C55a88189AE136b182e5fdA19dE9b63` |

### Parquet Schema

```text
block_number    uint64   — Block in which the event was emitted
tx_hash         string   — Transaction hash (0x-prefixed)
log_index       uint32   — Log index within the transaction
address         string   — Contract address that emitted the event
topic0          string   — Event signature hash
topic1          string   — First indexed parameter (if any)
topic2          string   — Second indexed parameter (if any)
topic3          string   — Third indexed parameter (if any)
data            string   — ABI-encoded non-indexed parameters
```

## Usage

```python
import pandas as pd

# Load identity events for Base (chain 8453)
df = pd.read_parquet("hf://datasets/qntx/erc8004-events/8453/identity.parquet")
print(df.head())
```

```python
from datasets import load_dataset

ds = load_dataset("qntx/erc8004-events", data_files="8453/identity.parquet")
```

## Updates

This dataset is refreshed every **15 minutes** via an automated sync pipeline ([source](https://github.com/qntx/erc8004)). Each run performs an incremental sync from the last cursor block to the current chain tip across all 16 networks in parallel.

## Source

- **Contracts**: [erc-8004/erc-8004-contracts](https://github.com/erc-8004/erc-8004-contracts)
- **Sync tool**: [qntx/erc8004](https://github.com/qntx/erc8004)
- **Standard**: ERC-8004 — On-chain Agent Identity & Reputation