BIP32 derivation implementation

src/base58.h

@@ -390,4 +390,30 @@ public:
     }
 };
 
+
+template<typename K, int Size, CChainParams::Base58Type Type> class CBitcoinExtKeyBase : public CBase58Data
+{
+public:
+    void SetKey(const K &key) {
+        unsigned char vch[Size];
+        key.Encode(vch);
+        SetData(Params().Base58Prefix(Type), vch, vch+Size);
+    }
+
+    K GetKey() {
+        K ret;
+        ret.Decode(&vchData[0], &vchData[Size]);
+        return ret;
+    }
+
+    CBitcoinExtKeyBase(const K &key) {
+        SetKey(key);
+    }
+
+    CBitcoinExtKeyBase() {}
+};
+
+typedef CBitcoinExtKeyBase<CExtKey, 74, CChainParams::EXT_SECRET_KEY> CBitcoinExtKey;
+typedef CBitcoinExtKeyBase<CExtPubKey, 74, CChainParams::EXT_PUBLIC_KEY> CBitcoinExtPubKey;
+
 #endif // BITCOIN_BASE58_H