feat: add CIP-1852 suppport

keys.js

@@ -1,17 +1,48 @@
+import { entropyToMnemonic } from 'bip39';
 import {
     Bip32PrivateKey,
 } from "@emurgo/cardano-serialization-lib-nodejs";
 
-import {
-    entropyToMnemonic,
-} from 'bip39';
+// Constants
+const entropy = '00000000000000000000000000000000';
+const mnemonic = entropyToMnemonic(entropy);
+const accountIndex = 0;
+
+// ########### Keys ###########
 
-let entropy = '00000000000000000000000000000000'
-let mnemonic = entropyToMnemonic(entropy);
-let privateKey = Bip32PrivateKey.from_bip39_entropy(
+// Following CIP-1852
+
+// Generate root key
+const rootKey = Bip32PrivateKey.from_bip39_entropy(
     Buffer.from(entropy, 'hex'),
     Buffer.from('')
 );
 
-console.log("mnemonic", mnemonic);
-console.log("privateKey", (privateKey).to_bech32());
+// Derive account key
+const harden = (num) => {
+    return 0x80000000 + num;
+};
+
+const accountKey = rootKey.derive(harden(1852)) // purpose
+                        .derive(harden(1815)) // coin type
+                        .derive(harden(parseInt(accountIndex))); // account
+
+// Derive address level keys
+
+// Private keys
+const paymentPrivKey = accountKey.derive(0).derive(0).to_raw_key(); // role and address index
+const stakePrivKey = accountKey.derive(2).derive(0).to_raw_key();
+const dRepPrivKey = accountKey.derive(3).derive(0).to_raw_key();
+const ccColdPrivKey = accountKey.derive(4).derive(0).to_raw_key();
+const ccHotPrivKey = accountKey.derive(5).derive(0).to_raw_key();
+// Public keys
+const paymentPubKey = paymentPrivKey.to_public();
+const stakePubKey = stakePrivKey.to_public();
+const dRepPubKey = dRepPrivKey.to_public();
+const ccColdPubKey = ccColdPrivKey.to_public();
+const ccHotPubKey = ccHotPrivKey.to_public();
+
+// ########### Logs ###########
+
+console.log("DRep ID:", dRepPubKey.hash().to_bech32('drep'));
+console.log("mnemonic:", mnemonic);