@ledgerhq/live-common/lib/hw/customLockScreenFetchSize.js

Common ground for the Ledger Live apps

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const errors_1 = require("@ledgerhq/errors");
/**
 * Attempt to fetch the size of the custom image set on the device,
 * or zero if there is no custom image set.
 */
exports.default = async (transport) => {
    const res = await transport.send(0xe0, 0x64, 0x00, 0x00, Buffer.from([]), [
        errors_1.StatusCodes.OK,
        errors_1.StatusCodes.DEVICE_IN_RECOVERY_MODE,
        errors_1.StatusCodes.UNKNOWN_APDU,
    ]);
    const status = res.readUInt16BE(res.length - 2);
    switch (status) {
        case errors_1.StatusCodes.OK:
            return res.readUInt32BE();
        case errors_1.StatusCodes.UNKNOWN_APDU: // Nb For il fw, since it doesn't support CLS
        case errors_1.StatusCodes.CUSTOM_IMAGE_EMPTY:
            return 0;
        case errors_1.StatusCodes.DEVICE_IN_RECOVERY_MODE:
            throw new errors_1.UnexpectedBootloader();
    }
    throw new errors_1.TransportStatusError(status);
};
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