n8n-nodes-ethereum

Comprehensive Ethereum blockchain integration for n8n with a unified node structure using viem. This community node package provides two powerful nodes: Ethereum (regular node) and Ethereum Trigger (trigger node) for interacting with Ethereum and EVM-compatible blockchains.

⚠️ Disclaimer

WARNING: This package is currently in early development and has not been thoroughly tested or audited. Please use at your own risk.

• ❌ Not production-ready
• ⚠️ May contain bugs or security vulnerabilities
• 🔍 Always verify transaction details before execution
• 💰 Test with small amounts first
• 🛡️ Conduct your own security review

By using this package, you acknowledge these risks and agree that you are solely responsible for any losses or damages.

Features

• ✨ Unified Node Structure: Single Ethereum node with Resource/Operation pattern for cleaner UX
• 🔐 Secure Credentials: Separate RPC and Account credentials with optional wallet for read operations
• 🔄 10 Resource Types: Account, Block, Transaction, Contract, ERC20, ERC721, ERC1155, ENS, Gas, Utils
• ⚡ Trigger Support: Monitor new blocks, contract events, and transactions in real-time
• 🌐 Multi-Chain: Supports Ethereum, Polygon, BSC, Arbitrum, Optimism, Avalanche, Fantom, Base, and custom networks
• 🪙 Complete Token Standards: ERC20, ERC721, ERC1155 with automatic ABI handling
• 📦 Built with viem: Modern, type-safe TypeScript library for Ethereum interactions

Installation

npm install @0xlimao/n8n-nodes-ethereum

Credentials

Ethereum RPC

Connection details for the Ethereum node.

Fields:

• Chain: Select from supported chains (Ethereum, Polygon, BSC, etc.) or choose Custom
• RPC URL (required): HTTP(S) or WebSocket endpoint (e.g., https://mainnet.infura.io/v3/YOUR-API-KEY)
• Custom Headers (optional): JSON object for API authentication (e.g., {"Authorization": "Bearer token"})

Ethereum Account

Wallet credentials for signing transactions. Optional for read operations.

Fields:

• Private Key (optional): 64-character hex private key (with or without 0x prefix)
• Mnemonic Phrase (optional): 12 or 24-word seed phrase
• Derivation Path: BIP-44 path for deriving account from mnemonic (default: m/44'/60'/0'/0/0)
• Passphrase: Optional passphrase for BIP-39 mnemonic

Note: At least one of Private Key or Mnemonic is required for write operations. Read operations don't need this credential.

Triggers

Event Trigger

Activates workflow when a smart contract emits specific events.

Features:

• Monitor all contracts (no address required)
• Support multiple contract addresses
• Support multiple event types

Block Trigger

Triggers when a new block is created on the blockchain.

Transaction Trigger

Triggers when transactions occur at specified addresses.

Features:

• Monitor specific addresses
• Filter for incoming transactions only
• Filter for outgoing transactions only
• Monitor both incoming and outgoing (default)

Nodes

Account Operations

• Get Balance: Retrieve native token balance with formatting options (wei/gwei/ether)
• Get Transaction Count: Get account nonce for transaction sequencing
• Get Code: Check if address is a smart contract

Block Operations

• Get Block: Retrieve detailed block information with optional full transactions
• Get Block Number: Get current blockchain height with caching support

Transaction Operations

• Send Transaction: Send native tokens with EIP-1559 gas support
• Get Transaction: Retrieve transaction details by hash
• Get Transaction Receipt: Get transaction receipt with event logs
• Wait For Transaction: Wait for confirmations with configurable timeout
• Estimate Gas: Estimate gas requirements with buffer

Contract Operations

• Read Contract: Call view/pure functions with dynamic parameter inputs
• Write Contract: Execute state-changing contract functions
• Deploy Contract: Deploy smart contracts with constructor arguments
• Multicall: Batch multiple read operations efficiently
• Simulate Contract: Test contract calls without sending transactions
• Get Logs: Query historical event logs with automatic decoding

ERC20 Token Standard (9 nodes)

• Get Balance: Token balance with automatic decimal formatting
• Transfer: Send tokens with decimal conversion
• Approve: Approve spending with unlimited option
• Transfer From: Transfer using allowance
• Get Allowance: Check approved amounts
• Get Total Supply: Query total token supply
• Get Decimals: Retrieve token decimals
• Get Name: Get token name
• Get Symbol: Get token symbol

ERC721 NFT Standard (9 nodes)

• Get Balance: NFT count for address
• Owner Of: Get owner of specific token ID
• Transfer From: Transfer NFT ownership
• Safe Transfer From: Safe transfer with receiver validation
• Approve: Approve NFT transfer
• Set Approval For All: Approve operator for all NFTs
• Get Approved: Get approved address for token
• Is Approved For All: Check operator approval status
• Token URI: Get token metadata URI

ERC1155 Multi-Token Standard (7 nodes)

• Balance Of: Get balance for specific token ID
• Balance Of Batch: Batch balance queries
• Safe Transfer From: Safe transfer single token type
• Safe Batch Transfer From: Batch transfer multiple token types
• Set Approval For All: Approve operator
• Is Approved For All: Check operator approval
• URI: Get token metadata URI

Gas Operations

• Get Gas Price: Retrieve current gas price (legacy)
• Get Fee History: Analyze historical fees for EIP-1559 optimization
• Estimate Max Priority Fee: Estimate priority fee for transactions

ENS Operations

• Get ENS Address: Resolve ENS name to Ethereum address
• Get ENS Name: Reverse resolve address to ENS name
• Get ENS Avatar: Retrieve avatar URI for ENS name
• Get ENS Text: Get text records (email, twitter, url, etc.)
• Get ENS Resolver: Get resolver contract address

Signature Operations

• Sign Message: Personal message signing with wallet
• Sign Typed Data: EIP-712 structured data signing
• Verify Message: Verify personal message signatures
• Verify Typed Data: Verify EIP-712 signatures
• Recover Address: Recover signer address from signature
• Hash Message: Keccak256 hash of messages
• Hash Typed Data: Hash typed data for signing

Utility Operations

• Format Units: Convert wei to human-readable format
• Parse Units: Convert human-readable to wei
• Get Chain ID: Retrieve current chain identifier
• Validate Address: Validate and checksum Ethereum addresses
• Encode Function Data: Encode function call data from ABI
• Decode Function Data: Decode function call data using ABI
• Encode Event Topics: Encode event topics for log filtering
• Decode Event Log: Decode event log data using ABI
• Get Contract Address: Calculate CREATE/CREATE2 deployment addresses

Advanced Operations

• Get Storage At: Read raw storage slots from contracts
• Call: Make raw contract calls with custom data
• Get Proof: Generate Merkle proofs for account state and storage

Usage Examples

Monitor Contract Events and Send Notifications

[Event Trigger] → [Process Data] → [Send Notification]

Periodically Read Contract State

[Schedule Trigger] → [Read Contract] → [Store Data]

Execute Contract Operation and Wait for Confirmation

[Trigger] → [Write Contract] → [Wait Transaction] → [Post-processing]

Supported Networks

The package includes pre-configured support for 18 major Ethereum-compatible networks:

Ethereum:

• Mainnet
• Sepolia (testnet)
• Goerli (testnet)
• Holesky (testnet)

Layer 2 & Scaling:

• Arbitrum One
• Arbitrum Sepolia
• Optimism
• Optimism Sepolia
• Base
• Base Sepolia

Sidechains & Alternative L1s:

• Polygon (Matic)
• Polygon Amoy (testnet)
• BNB Smart Chain (BSC)
• BSC Testnet
• Avalanche C-Chain
• Avalanche Fuji (testnet)

Additional Networks:

• Gnosis Chain
• Celo

You can also add custom networks by configuring the RPC endpoint directly.

License

MIT License

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Contributing

Issues and Pull Requests are welcome!

Related Links

• n8n Official Website
• Ethereum Developer Documentation