constants.js

//  Number of key slots in SATSCARD
export const NUM_SLOTS = 10;

//  the "CVC" is the spending code on back of card.
//  - see also many text messages to user about this
//  - for TAPSIGNER, this is a minimum length (max 32)
export const CVC_LENGTH = 6;

//  no need to scan the blockchain before this point in time, since product didn't exist yet
//  - March 25/2022
export const PROJECT_EPOC_TIME_T = 1648215566;

//  length from start/end of bech32 address that is provided
//  - center part will be replaced with three underscores
export const ADDR_TRIM = 12;

//  require nonce sizes (bytes)
export const CARD_NONCE_SIZE = 16;
export const USER_NONCE_SIZE = 16;

//  published Coinkite factory root keys
export const FACTORY_ROOT_KEYS = [
  Buffer.from(
    '03028a0e89e70d0ec0d932053a89ab1da7d9182bdc6d2f03e706ee99517d05d9e1',
    'hex'
  ),
  Buffer.from(
    '027722ef208e681bac05f1b4b3cc478d6bf353ac9a09ff0c843430138f65c27bab',
    'hex'
  ),
];

//  our Javacard applet has this APP ID
export const APP_ID = Buffer.from('f0436f696e6b697465434152447631', 'hex');

//  APDU CLA and INS fields for our one APDU, which uses CBOR data
export const CBOR_CLA = 0x00;
export const CBOR_INS = 0xcb;

//  Correct ADPU response from all commands: 90 00
export const SW_OKAY = '9000';

//  path lengths (depth) is limited 8 components in derive command - check docs/limitations.md
export const DERIVE_MAX_BIP32_PATH_DEPTH = 8;

//  EOF