LogTUI

A terminal-based UI for monitoring blockchain events using Hypersync.

Quickstart

Try it with a single command:

# Scan Uniswapv4 events on Unichain (using pnpx)
pnpx logtui uniswap-v4 unichain

# Monitor Aave events on Arbitrum (using npx)
npx logtui aave arbitrum

# See all available options
pnpx logtui --help

Features

• Real-time monitoring of blockchain events with a beautiful terminal UI
• Supports all Hypersync-enabled networks (Ethereum, Arbitrum, Optimism, etc.)
• Extensive preset collection covering DeFi, Oracles, NFTs, L2s, and more
• Built-in presets for 20+ protocols (Uniswap, Chainlink, Aave, ENS, etc.)
• Custom event signature support
• Event distribution visualization
• Progress tracking and statistics
• Automatic network discovery from Hypersync API with persistent caching

Installation

Global Installation

npm install -g logtui
# or
yarn global add logtui
# or
pnpm add -g logtui

Local Installation

npm install logtui
# or
yarn add logtui
# or
pnpm add logtui

Usage

CLI

# Default: Monitor Uniswap V3 events on Ethereum
logtui

# Track Uniswap V4 events
logtui uniswap-v4

# Monitor Chainlink price feed updates
logtui chainlink-price-feeds

# Track AAVE lending events on Arbitrum
logtui aave arbitrum

# Watch LayerZero cross-chain messages on Optimism
logtui layerzero optimism

# Monitor ENS registry events
logtui ens

# Monitor on a testnet
logtui chainlink-vrf arbitrum-sepolia

# List all available presets
logtui --list-presets

# List all available networks
logtui --list-networks

# Force refresh the network list from Hypersync API (updates cache)
logtui --refresh-networks

# Custom events
logtui -e "Transfer(address,address,uint256)" "Approval(address,address,uint256)" -n eth

Network Discovery

LogTUI automatically discovers and caches all networks supported by Hypersync:

1. On first run, it loads the default networks
2. It then attempts to fetch all available networks from the Hypersync API
3. Networks are cached locally for future use, even when offline
4. Use --refresh-networks to force update the cached network list

This ensures you always have access to all supported networks, even when working offline.

CLI Options

Usage: logtui [options] [preset] [network]

Arguments:
  preset                  Event preset to use (e.g., uniswap-v3, erc20, erc721) (default: "uniswap-v3")
  network                 Network to connect to (e.g., eth, arbitrum, optimism) (default: "eth")

Options:
  -V, --version           output the version number
  -e, --events <events>   Custom event signatures to monitor
  -n, --network <network> Network to connect to
  -t, --title <title>     Custom title for the scanner (default: "Blockchain Event Scanner")
  -l, --list-presets      List available event presets and exit
  -N, --list-networks     List all available networks and exit
  --refresh-networks      Force refresh network list from API
  -v, --verbose           Show additional info in the console
  -h, --help              display help for command

Programmatic Usage

You can also use LogTUI as a library in your Node.js applications:

import {
  createScanner,
  getNetworkUrl,
  getEventSignatures,
  fetchNetworks,
} from "logtui";

// Refresh the network list (optional, will use cache by default)
// Pass true to force refresh from API: fetchNetworks(true)
await fetchNetworks();

// Option 1: Using direct parameters
createScanner({
  networkUrl: "http://eth.hypersync.xyz",
  eventSignatures: [
    "Transfer(address,address,uint256)",
    "Approval(address,address,uint256)",
  ],
  title: "My Custom Scanner",
});

// Option 2: Using helper functions
const networkUrl = getNetworkUrl("arbitrum");
const eventSignatures = getEventSignatures("uniswap-v3");

createScanner({
  networkUrl,
  eventSignatures,
  title: "Uniswap V3 Scanner",
});

Supported Networks

LogTUI automatically discovers all networks supported by Hypersync. The following are some commonly used networks:

Mainnets

• eth: Ethereum Mainnet
• arbitrum: Arbitrum One
• optimism: Optimism
• base: Base
• polygon: Polygon PoS
• And many more...

Testnets

• arbitrum-sepolia: Arbitrum Sepolia
• optimism-sepolia: Optimism Sepolia
• And more...

Run logtui --list-networks to see the complete, up-to-date list of all supported networks.

Built-in Event Presets

Core Presets

• uniswap-v3: Core Uniswap V3 events (PoolCreated, Swap, Mint, Burn, Initialize)
• uniswap-v4: Uniswap V4 PoolManager events (Swap, ModifyLiquidity, Initialize, Donate, and more)
• erc20: Standard ERC-20 token events (Transfer, Approval)
• erc721: Standard ERC-721 NFT events (Transfer, Approval, ApprovalForAll)

Oracles

• chainlink-price-feeds: Chainlink price oracle events (AnswerUpdated, NewRound)
• chainlink-vrf: Chainlink Verifiable Random Function events
• pyth: Pyth Network oracle events
• uma: UMA Oracle events (PriceProposed, PriceDisputed, PriceSettled)

DeFi Protocols

• aave: Aave V3 lending protocol events (Supply, Withdraw, Borrow, Repay)
• curve: Curve Finance pool events (TokenExchange, AddLiquidity)
• weth: Wrapped Ether events (Deposit, Withdrawal, Transfer)
• usdc: USD Coin stablecoin events

Cross-chain & L2

• layerzero: LayerZero cross-chain messaging events
• arbitrum: Arbitrum sequencer and bridge events

Gaming & NFTs

• blur: Blur NFT marketplace events
• axie: Axie Infinity game events
• ens: Ethereum Name Service registry events

Emerging Tech

• erc4337: Account Abstraction (ERC-4337) events
• universalRouter: Uniswap's intent-based Universal Router events

Development

# Clone the repository
git clone https://github.com/yourusername/logtui.git
cd logtui

# Install dependencies
npm install

# Run the development version
node bin/logtui.js

Acknowledgements

• Built with Hypersync by Envio
• Terminal UI powered by blessed