async _sendErrorResponse(stream, code, message) {
		logTE('p2p', message);
		await stream.sink([Buffer.from(JSON.stringify({ 
			error: code,
			message
		}))]);
	}
Send an error response through a stream
@param {Object} stream - Stream to send through
@param {string} code - Error code
@param {string} message - Error message
@returns {Promise<void>}
@private