Ethereum Data: Index Contracts, Tokens, and DeFi

Index Ethereum's contract events, token transfers, and decoded transactions in one pipeline, delivered to your own database. Real-time and complete historical data, no archive node to run.

Ethereum is the canonical smart-contract chain and the EVM reference implementation that every other EVM network forks from. It holds the deepest pools of DeFi, NFT, stablecoin, and staking activity onchain, and its execution model and opcodes define the standard that Arbitrum, Base, Optimism, Polygon, and dozens of L2s inherit. You can read how the foundation frames it at ethereum.org.

That depth is the data problem. Ethereum has the longest history and the highest cumulative data volume of any EVM chain, which makes archive-node operation, reorg handling, and full backfills more painful here than anywhere else. Indexing Co covers Ethereum in a single pipeline, decodes the raw chain into the shape you want, and delivers it to your own PostgreSQL, warehouse, or webhook. Real-time and full history back to genesis, with no node to operate.

Source Ethereum L1 blocks

Ingest blocks, logs, traces

Decode ABIs to events

Transform your JavaScript

Deliver your database

Why Ethereum data is hard

Volume and Archive Depth Ethereum carries more cumulative history than any other EVM chain, with millions of blocks and years of state to walk through. A full archive node is heavy to run and slow to sync, and pulling clean historical data from genesis forward is the hardest backfill in the EVM world.

DeFi Protocol Decoding The deepest DeFi stack lives here: Uniswap v2 and v3, Aave, Curve, Lido, Sky (formerly MakerDAO), and a long tail of vaults and routers. Each protocol needs its own ABIs and event handling, and proxy patterns mean the correct ABI shifts as contracts upgrade underneath you.

Token and NFT Breadth Ethereum hosts the largest set of ERC-20 stablecoins and ERC-721 and ERC-1155 collections anywhere, from USDC and USDT to blue-chip NFT lines. Capturing every transfer, mint, and approval across that breadth, in real time, is a standing volume problem.

Reorgs and Finality Post-Merge Ethereum has proposer-based blocks and a two-epoch path to finality, so the chain head can still reorganize before it settles. A dataset that does not track reorgs and finality will drift, and naive scrapers write rows that later become wrong.

What Indexing Co delivers for Ethereum

The DIY Path

Stand up and maintain the whole stack yourself.

Run an Ethereum archive node or wire up a third-party RPC.
Fetch and decode logs, traces, and receipts against the right ABIs.
Track proxy upgrades and per-protocol event schemas by hand.
Build backfill, reorg handling, and real-time delivery from scratch.

Indexing Co

One pipeline sources, decodes, and delivers Ethereum to your store.

Ethereum contract events, token transfers, and decoded txs in a single pipeline.
Decoded data, shaped by your JavaScript transform.
Lands in your PostgreSQL, BigQuery, warehouse, or webhook.
Real-time delivery plus complete backfilled history. No node, no RPC babysitting.

What you can index

EVM data type	On Ethereum, for example
Contract events and logs	Uniswap swaps and pool mints, Aave borrows
Token transfers (ERC-20, ERC-721)	USDC and USDT transfers, blue-chip NFT mints
Decoded transactions and traces	Router multicalls, Sky (formerly MakerDAO) vault actions
Protocol and account state	Curve pool balances, Lido staking, Aave positions

A transform, not a subgraph

You write the transform in JavaScript, not AssemblyScript, and change it without re-indexing from block zero. Indexing Co runs your function over each block server-side: decode the logs you care about and return rows for your destination.

// Indexing Co transform: reshape each block into rows for your database
function transform(block) {
  const results = [];
  const signatures = [
    'event Transfer(address indexed from, address indexed to, uint256 value)'
  ];

  for (const tx of block.transactions || []) {
    for (const log of tx.receipt?.logs || []) {
      const event = utils.evmDecodeLogWithMetadata(log, signatures);
      if (!event) continue;
      results.push({
        chain: block._network,
        block: Number(block.number),
        tx_hash: tx.hash,
        contract_address: log.address?.toLowerCase(),
        from: event.decoded.from,
        to: event.decoded.to,
        value: event.decoded.value,
      });
    }
  }
  return results;
}

Ethereum with Indexing Co

Run it yourself if

You want full control of node infrastructure and have the team to operate an Ethereum archive node, decode every protocol's ABIs, and build backfill and reorg handling in-house.

Use Indexing Co if

You want Ethereum contract events, token transfers, and decoded transactions delivered to your own database, with real-time plus complete history and no infrastructure to run.

Get a Demo Open the Console

FAQ

Do I need to run an Ethereum node?

No. Indexing Co sources Ethereum blocks, logs, and traces for you, including full historical data back to genesis, so you never operate an archive node or babysit an RPC endpoint.

Can I index any protocol on Ethereum?

Yes. Point a pipeline at any Ethereum contract or set of contracts, from Uniswap and Aave to Curve, Lido, Sky, or your own deployments, and we decode the events against the right ABI.

Does Indexing Co handle Ethereum reorgs and proxy upgrades?

Yes. The pipeline accounts for chain reorganizations and finality, and tracks proxy implementation changes, so your decoded data stays correct as the head settles and contracts upgrade.

Where does the Ethereum data go?

Into your own destination: PostgreSQL, BigQuery, a warehouse, or a webhook. You define the output schema and own the storage.

Can I get complete historical Ethereum data?

Yes. We backfill from your chosen start block and merge it with real-time data, so your Ethereum dataset is gap-free from genesis forward if you want it.

Get Started

Index Ethereum in minutes. Set up your first Ethereum contract or token pipeline without running a node.