smart_contract_repos.js

```javascript
// Importing necessary libraries and tools
const fs = require('fs');
const path = require('path');
const { execSync } = require('child_process');

// Importing blockchain configuration
const blockchainConfig = require('./blockchain_config');

// Smart Contract Repositories configuration for the project
class SmartContractRepos {
    constructor() {
        this.repos = {
            QuantumUnityFramework: this.cloneRepo(blockchainConfig.QUANTUM_UNITY_FRAMEWORK_CHAIN_ID),
            GlobalDigitalCurrencyNetwork: this.cloneRepo(blockchainConfig.GLOBAL_DIGITAL_CURRENCY_NETWORK_CHAIN_ID),
            Contudo: this.cloneRepo(blockchainConfig.CONTUDO_CHAIN_ID)
        };
    }

    // Function to clone the repository
    cloneRepo(chainId) {
        const repoUrl = this.getRepoUrl(chainId);
        const repoPath = path.join(__dirname, 'repos', chainId);

        // Create the repos directory if it doesn't exist
        if (!fs.existsSync(path.join(__dirname, 'repos'))) {
            fs.mkdirSync(path.join(__dirname, 'repos'));
        }

        // Clone the repository
        execSync(`git clone ${repoUrl} ${repoPath}`, { stdio: 'inherit' });

        // Install the dependencies
        execSync('npm install', { cwd: repoPath, stdio: 'inherit' });

        return repoPath;
    }

    // Function to get the repository URL
    getRepoUrl(chainId) {
        // Replace this with the actual logic to get the repository URL
        return `https://github.com/your-organization/${chainId}.git`;
    }
}

module.exports = new SmartContractRepos();
```