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Is there any Javascript code out there or examples on how to sign a transaction by using the extended-private-key?
What I am essentially looking for is code that will help derive the private key, that I can then use to sign an individual UTXO with.
Thanks in advance!
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For anyone that might be interested in this, there is a great BIP32 library from the same people who created the bitcoinjs-lib and it has the tools to derive your private keys from the extended master-private-key.
const t = bip32.fromBase58(extPrivateKey, zenCashNetwork);
const derivedIndex = `${utxo.AddrType}/${utxo.AddrIndex}`;
const wifKey = t.derivePath(derivedIndex).toWIF();
In our case, we needed this to sign a ZenCash transaction