OpenSea Offer Maker

A command-line tool for creating and managing offers on OpenSea. Supports multiple chains (Ethereum, Base, Sepolia).

Features

• Create collection and individual NFT offers
• Automatic bidding with price range
• Monitor current offers
• Support for multiple chains
• Real-time offer tracking
• Secure private key management

Installation

git clone https://github.com/yourusername/opensea-offer-maker.git
cd opensea-offer-maker
npm install

Configuration

1. Create a .env file in the root directory:

OPENSEA_API_KEY=your_api_key
ALCHEMY_API_KEY=your_alchemy_api_key

2. Set up your private key securely:

# Initialize your private key (will be encrypted)
node src/cli.js key setup

# Verify your key setup
node src/cli.js key test

The private key will be encrypted and stored locally. You can also use a temporary private key for one-time operations:

node src/cli.js send -t eth --private-key 0xYourPrivateKey ...

Usage

Managing Private Keys

# Add a new private key with a name
node src/cli.js key add my-key

# List all stored keys
node src/cli.js key list

# Switch active key
node src/cli.js key use my-key

# Remove a stored key
node src/cli.js key remove my-key

# Test key decryption
node src/cli.js key test

# Use temporary private key for any command
--private-key <key>

Check Collection Offers

# View current offers for a collection
node src/cli.js check -c collection_slug

# View offers on specific chain
node src/cli.js check -c collection_slug --chain ethereum

Create Offers

# Create a collection offer
node src/cli.js offer -c collection_slug -o 0.0001 -e 15

# Create an individual NFT offer
node src/cli.js offer -a contract_address -t token_id -o 0.0001 -e 15

# Create offer on specific chain
node src/cli.js offer -c collection_slug -o 0.0001 --chain base

Auto Bidding

# Automatically create collection offers
node src/cli.js auto collection -c collection_slug --min 0.01 --max 0.035 --increment 0.0001 --interval 30 --floor-percentage 80

# Automatically create individual token offers
node src/cli.js auto token -a contract_address -t token_id -c collection_slug --min 0.01 --max 0.035 --increment 0.0001 --interval 30 --floor-percentage 80

# Auto bidding on specific chain
node src/cli.js auto collection -c collection_slug --min 0.01 --max 0.035 --chain ethereum

Send Tokens

# Send ETH
node src/cli.js send -t eth -a 0.1 -r recipient_address

# Send WETH
node src/cli.js send -t weth -a 0.1 -r recipient_address

Swap ETH/WETH

# Convert ETH to WETH
node src/cli.js swap -a 0.1 -d eth2weth

# Convert WETH to ETH
node src/cli.js swap -a 0.1 -d weth2eth

Cross-Market Listing

# List NFT on multiple marketplaces
node src/cli.js list -a contract_address -t token_id -p 0.1 --marketplaces opensea,blur

# List with floor price difference
node src/cli.js list -a contract_address -t token_id --floor-diff +10% --marketplaces all

# List with specific expiration
node src/cli.js list -a contract_address -t token_id -p 0.1 -e 7d --marketplaces opensea,blur

Supported marketplaces:

• OpenSea
• Blur (Ethereum only)

Examples

# Check current offers for a collection on Base
node src/cli.js check -c scribblebears --chain base

# Create a collection offer for 0.1 WETH
node src/cli.js offer -c scribblebears -o 0.1 -e 60 --chain base

# Create auto collection offers with floor price limit
node src/cli.js auto collection -c scribblebears --min 0.01 --max 0.035 --floor-percentage 80 --chain base

# Create auto token offers with floor price limit
node src/cli.js auto token -a 0xf3ec2d6394fc899a5dc1823a205670ebb30939cc -t 0 -c scribblebears --min 0.01 --max 0.035 --floor-percentage 80 --chain base

Security

• Private keys are encrypted using AES-256-GCM
• No private keys are stored in plain text
• Support for temporary private keys via command line
• Each command can use a different private key if needed

Debug Mode

Add --debug to any command for detailed logging:

node src/cli.js key setup --debug

Supported Chains

• Ethereum Mainnet (--chain ethereum)
• Base (--chain base)
• Sepolia (--chain sepolia)

License

MIT