const fs=require('fs'); module.exports=class { constructor(longName, fileExtension, supportedParameters=[]) { this.longName=longName; this.fileExtension=fileExtension; } async getSpeech(text, voice, params) {} async getSpeechFile(text, filepath, voice, params) { const data = await this.getSpeech(text, voice, params); const contents = await data.arrayBuffer(); const buf = Buffer.from(contents); fs.writeFileSync(filepath, buf); return filepath; } }