indexing-blocks

name	indexing-blocks
description	Use when processing every block (or every Nth block) for time-series data, periodic snapshots, or block-level aggregations. onBlock API, interval option, and block handler context.

Block Handlers

Process every block (or every Nth block) using onBlock from generated. No contract address or config.yaml entry needed.

Handler

import { onBlock } from "generated";

onBlock(
  { name: "BlockTracker", chain: 1, interval: 100 },
  async ({ block, context }) => {
    context.BlockSnapshot.set({
      id: `${block.number}`,
      blockNumber: BigInt(block.number),
      timestamp: BigInt(block.timestamp),
    });
  }
);

Options

Option	Type	Required	Description
name	string	yes	Handler name for logging
chain	number	yes	Chain ID to process
interval	number	no	Process every Nth block (default: 1)
startBlock	number	no	Inclusive start block
endBlock	number	no	Inclusive end block

Notes

• onBlock self-registers — no config.yaml entry needed
• No events or contract address required
• EVM chains only
• The handler context has the same entity API as event handlers
• block object provides number and timestamp (more fields may be added)

Deep Documentation

Full reference: https://docs.envio.dev/docs/HyperIndex-LLM/hyperindex-complete