Utilities

Auxiliary routines

The following functions do not belong to the ZkBobClient object and should be imported before using:

Deriving Spending Key from the Mnemonic

function deriveSpendingKeyZkBob(mnemonic: string): Uint8Array

Parameters

mnemonic - 12-words BIP39 valid mnemonic phrase (English dictionary)

Returns

The spending key bytes array (32 bytes)

Example

const mnemonic = 'magic trophy foil direct marriage glad bench wash doctor risk end cheap';
const sk = deriveSpendingKeyZkBob(mnemonic);
const hexSk = [...sk].map(x => x.toString(16).padStart(2, '0')).join('')
console.log(`Your top secret key: 0x${hexSk}`);
// output:
// Your top secret key: 0xc792b86b61d8fe174c0a1fd44a23aa8db64d18f4d94f9e35b049b4c9af4b8401