In an ESM project, calling TelnyxWebhook.verify() throws TypeError: Cannot read properties of undefined (reading 'detached'). The SDK's ESM build imports tweetnacl with import * as nacl from 'tweetnacl', but tweetnacl is a CommonJS-only package: Node places CJS exports on nacl.default, so nacl.sign is undefined and nacl.sign.detached.verify(...) crashes. The same code works in CommonJS projects.