Postman pre-request script to sign requests adding api-key and api-sign created using HmacRIPEMD160 based on secret and URI, for two different environments

postman-pre-request-sign-hmac-ripe160.js

const API_KEYS = {
    'prod': {
        'key': '',
        'secret': '',
    },
    'uat': {
        'key': '',
        'secret': '',
    }
};
 
if (!pm.request.headers.get('api-key') && !pm.request.headers.get('api-sig')) {
    const env = /(CHANGEME)/.test(pm.request.url) ? 'prod' : 'uat';
     
    pm.request.headers.add({
        key: 'api-key',
        value: API_KEYS[env]['key']
    });
 
    const path = pm.request.url.getPath();
    const ciphertext = crypto.HmacRIPEMD160(path, API_KEYS[env]['secret']).toString();
    pm.request.headers.add({
        key: 'api-sig',
        value: ciphertext
    });
 
    // console.log('api-key:' + pm.request.headers.get('api-key'));
    // console.log('api-sig:' + pm.request.headers.get('api-sig'));
}