@ledgerhq/live-common
Version:
Common ground for the Ledger Live apps
24 lines • 978 B
JavaScript
import { TransportStatusError, UnexpectedBootloader, StatusCodes } from "@ledgerhq/errors";
/**
* Attempt to fetch a hash of the custom image loaded on the device.
* We will not consider the 0x662e status code an error since it just
* means empty custom image and an empty string will fit better.
*/
export default async (transport) => {
const res = await transport.send(0xe0, 0x66, 0x00, 0x00, Buffer.from([]), [
StatusCodes.OK,
StatusCodes.CUSTOM_IMAGE_EMPTY,
StatusCodes.DEVICE_IN_RECOVERY_MODE,
]);
const status = res.readUInt16BE(res.length - 2);
switch (status) {
case StatusCodes.OK:
return res.slice(0, res.length - 2).toString("hex");
case StatusCodes.CUSTOM_IMAGE_EMPTY:
return "";
case StatusCodes.DEVICE_IN_RECOVERY_MODE:
throw new UnexpectedBootloader();
}
throw new TransportStatusError(status);
};
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