termix-mobile/plugins/withNetworkSecurityConfig.js

const {withAndroidManifest, withDangerousMod} = require('@expo/config-plugins');
const path = require('path');
const fs = require('fs');

const withNetworkSecurityConfig = (config) => {
    config = withAndroidManifest(config, async (config) => {
        const mainApplication = config.modResults.manifest.application[0];

        mainApplication.$['android:networkSecurityConfig'] = '@xml/network_security_config';

        return config;
    });

    config = withDangerousMod(config, ['android', async (config) => {
        const projectRoot = config.modRequest.projectRoot;
        const resXmlPath = path.join(projectRoot, 'android', 'app', 'src', 'main', 'res', 'xml');

        if (!fs.existsSync(resXmlPath)) {
            fs.mkdirSync(resXmlPath, {recursive: true});
        }

        const networkSecurityConfigPath = path.join(resXmlPath, 'network_security_config.xml');

        const networkSecurityConfig = `<?xml version="1.0" encoding="utf-8"?>
<network-security-config>
    <!-- Allow cleartext traffic for all domains (for local development and IP addresses) -->
    <!-- Trust both system certificates AND user-installed certificates (for self-signed certs) -->
    <base-config cleartextTrafficPermitted="true">
        <trust-anchors>
            <!-- System certificates (built-in CAs) -->
            <certificates src="system" />
            <!-- User-installed certificates (for self-signed/local CA certificates) -->
            <certificates src="user" />
        </trust-anchors>
    </base-config>

    <!-- Specifically allow local network addresses -->
    <domain-config cleartextTrafficPermitted="true">
        <domain includeSubdomains="true">localhost</domain>
        <domain includeSubdomains="true">127.0.0.1</domain>
        <domain includeSubdomains="true">10.0.2.2</domain>
        <trust-anchors>
            <certificates src="system" />
            <certificates src="user" />
        </trust-anchors>
    </domain-config>
</network-security-config>
`;

        fs.writeFileSync(networkSecurityConfigPath, networkSecurityConfig);

        return config;
    },]);

    return config;
};

module.exports = withNetworkSecurityConfig;