Cannot retrieve secret key from mneumonic

[akhilparakka]

`const StellarHDWallet = require("stellar-hd-wallet");
const { Keypair } = require("stellar-sdk");

function privateKeyToMnemonic(privateKey) {
const mnemonic = StellarHDWallet.generateMnemonic(privateKey);
return mnemonic;
}

const privateKey = "SBT4B2Y4VN33OCHVPRSD6JXXNPZ2UDXQFLRS7B5C4MLRMLOTEZS4UDY5";
console.log("Private key before: ", privateKey);

const mneumonic = privateKeyToMnemonic(privateKey);
console.log("Mneumonic is ", mneumonic);

const wallet = StellarHDWallet.fromMnemonic(mneumonic);
console.log(wallet.getSecret(0));
`
The key keeps changing

Private key before: SBT4B2Y4VN33OCHVPRSD6JXXNPZ2UDXQFLRS7B5C4MLRMLOTEZS4UDY5 Mneumonic is decline come potato citizen visual awkward owner illness pigeon save apple snake ordinary salmon twenty uphold toss must put primary oak hollow people ivory SBCNTVPPHD2GDWQTKA7CNCMLI53QDZK7JWKHTDZGTVCV4OIHTSGR5GQI

Private key before: SBT4B2Y4VN33OCHVPRSD6JXXNPZ2UDXQFLRS7B5C4MLRMLOTEZS4UDY5 Mneumonic is dance scatter cry recycle rookie day wage culture fly expect wolf mirror market approve soon before test sleep heavy connect unknown lawsuit lake idle SDZGV6NYGR7BNCWMJV2EUPXSGGGUEZ3C47Y2RPCFF7J7RHC6XZIUEVPU

[chatch]

StellarHDWallet.generateMnemonic() will generate new random bytes for a new mnemonic everytime. it will ignore the privateKey that your passing.

because the interface is:

  static generateMnemonic({
    entropyBits = ENTROPY_BITS,
    language = "english",
    rngFn = undefined
  } = {}) {

so maybe what you want is a wallet for the private key above? if so look at Wallet in the stellar-sdk package sorry it's Keypair.fromSecret() in stellar-base ...