You can use the Steam related error objects from the node-steam-* that DoctorMcKay have created.
An error object could look like this (node-steam-trade-offer-manager):
{ Error: There was an error sending your trade offer. Please try again later. (26) ... eresult: 26 }
steamErrors(errorObject.eresult, (err, result) => { if(err){ throw err; } console.log(result); });
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