Return the hardened version of the given BIP32 index.
Hardening is equivalent to adding 2^31.
BIP32 index
the hardened index
import {hardenedBIP32Index} from "@caravan/bitcoin";console.log(hardenedBIP32Index(44); // 2147483692 Copy
import {hardenedBIP32Index} from "@caravan/bitcoin";console.log(hardenedBIP32Index(44); // 2147483692
Return the hardened version of the given BIP32 index.
Hardening is equivalent to adding 2^31.