Smart Contract Analysis with Cana CLI

Improve smart contract analysis with Cana CLI. It’s fast, efficient, and designed specifically for EVM chains.

Overview

Cana CLI is a command-line tool that streamlines helpful smart contract metadata analysis specific to subgraph development across multiple EVM-compatible chains. It simplifies retrieving contract details, detecting proxy implementations, extracting ABIs, and more.

Key Features

With Cana CLI, you can:

• Detect deployment blocks
• Verify source code
• Extract ABIs & event signatures
• Identify proxy and implementation contracts
• Support multiple chains

Prerequisites

Before installing Cana CLI, make sure you have:

• Node.js v16+⁠
• npm v6+⁠
• Block explorer API keys

Installation & Setup

1. Install Cana CLI

Use npm to install it globally:

1npm install -g contract-analyzer

2. Configure Cana CLI

Set up a blockchain environment for analysis:

1cana setup

During setup, you’ll be prompted to provide the required block explorer API key and block explorer endpoint URL.

After setup, Cana CLI creates a configuration file at ~/.contract-analyzer/config.json. This file stores your block explorer API credentials, endpoint URLs, and chain selection preferences for future use.

Steps: Using Cana CLI for Smart Contract Analysis

1. Select a Chain

Cana CLI supports multiple EVM-compatible chains.

For a list of chains added run this command:

1cana chains

Then select a chain with this command:

1cana chains --switch <chain>

Once a chain is selected, all subsequent contract analyses will continue on that chain.

2. Basic Contract Analysis

Run the following command to analyze a contract:

1cana analyze 0xContractAddress

or

1cana -a 0xContractAddress

This command fetches and displays essential contract information in the terminal using a clear, organized format.

3. Understanding the Output

Cana CLI organizes results into the terminal and into a structured directory when detailed contract data is successfully retrieved:

1contracts-analyzed/2└── ContractName_chainName_YYYY-MM-DD/3  ├── contract/            # Folder for individual contract files4  ├── abi.json              # Contract ABI5  └── event-information.json # Event signatures and examples

This format makes it easy to reference contract metadata, event signatures, and ABIs for subgraph development.

4. Chain Management

Add and manage chains:

1cana setup             # Add a new chain2cana chains            # List configured chains3cana chains -s <chain> # Switch chains

Troubleshooting

Missing Data? Ensure that the contract address is correct, that it’s verified on the block explorer, and that your API key has the required permissions.

Conclusion

With Cana CLI, you can efficiently analyze smart contracts, extract crucial metadata, and support subgraph development with ease.