"TypeError: Cannot set property 'X-App-Access-Ts' of undefined" In JS

[ominfowave]

Getting "TypeError: Cannot set property 'X-App-Access-Ts' of undefined" error on the following line:
config.headers['X-App-Access-Sig'] = signature.digest('hex');

[asadullah097]

Add this to your signature methods as well.
const ts = Math.floor(Date.now() / 1000);
config.headers['X-App-Access-Ts'] = ts.toString();
const signature = crypto.createHmac('sha256', this.SUMSUB_SECRET_KEY);
signature.update(ts + config.method.toUpperCase() + config.url);
config.headers['X-App-Access-Sig'] = signature.digest('hex');