diff --git a/depend/zcash/src/pubkey.cpp b/depend/zcash/src/pubkey.cpp
index 366dc44c0..55f862685 100644
--- a/depend/zcash/src/pubkey.cpp
+++ b/depend/zcash/src/pubkey.cpp
@@ -41,6 +41,8 @@ bool CPubKey::Verify(const uint256 &hash, const std::vector<unsigned char>& vchS
     return secp256k1_ecdsa_verify(secp256k1_context_static, &sig, hash.begin(), &pubkey);
 }
 
+#if 0
+
 bool CPubKey::RecoverCompact(const uint256 &hash, const std::vector<unsigned char>& vchSig) {
     if (vchSig.size() != COMPACT_SIGNATURE_SIZE)
         return false;
@@ -138,6 +140,7 @@ bool CExtPubKey::Derive(CExtPubKey &out, unsigned int _nChild) const {
     out.nChild = _nChild;
     return pubkey.Derive(out.pubkey, out.chaincode, _nChild, chaincode);
 }
+#endif
 
 /* static */ bool CPubKey::CheckLowS(const std::vector<unsigned char>& vchSig) {
     secp256k1_ecdsa_signature sig;
@@ -149,6 +152,7 @@ bool CExtPubKey::Derive(CExtPubKey &out, unsigned int _nChild) const {
     return (!secp256k1_ecdsa_signature_normalize(secp256k1_context_static, NULL, &sig));
 }
 
+#if 0
 /* static */ std::optional<CChainablePubKey> CChainablePubKey::FromParts(ChainCode chaincode, CPubKey pubkey) {
     if (pubkey.IsCompressed()) {
         return CChainablePubKey(chaincode, pubkey);
@@ -156,3 +160,5 @@ bool CExtPubKey::Derive(CExtPubKey &out, unsigned int _nChild) const {
         return std::nullopt;
     }
 }
+
+#endif
\ No newline at end of file
diff --git a/depend/zcash/src/pubkey.h b/depend/zcash/src/pubkey.h
index 5a0e391bd..f6948f742 100644
--- a/depend/zcash/src/pubkey.h
+++ b/depend/zcash/src/pubkey.h
@@ -173,8 +173,10 @@ class CPubKey
         return size() > 0;
     }
 
+#if 0
     //! fully validate whether this is a valid public key (more expensive than IsValid())
     bool IsFullyValid() const;
+#endif
 
     //! Check whether this is a compressed public key.
     bool IsCompressed() const
@@ -193,6 +195,7 @@ class CPubKey
      */
     static bool CheckLowS(const std::vector<unsigned char>& vchSig);
 
+#if 0
     //! Recover a public key from a compact signature.
     bool RecoverCompact(const uint256& hash, const std::vector<unsigned char>& vchSig);
 
@@ -201,8 +204,10 @@ class CPubKey
 
     //! Derive BIP32 child pubkey.
     bool Derive(CPubKey& pubkeyChild, ChainCode &ccChild, unsigned int nChild, const ChainCode& cc) const;
+#endif
 };
 
+#if 0
 class CChainablePubKey {
 private:
     ChainCode chaincode;
@@ -303,5 +308,6 @@ struct CExtPubKey {
         Decode(code);
     }
 };
+#endif
 
 #endif // BITCOIN_PUBKEY_H
diff --git a/depend/zcash/src/script/interpreter.cpp b/depend/zcash/src/script/interpreter.cpp
index edc16a637..099042a17 100644
--- a/depend/zcash/src/script/interpreter.cpp
+++ b/depend/zcash/src/script/interpreter.cpp
@@ -985,7 +985,7 @@ bool CallbackTransactionSignatureChecker::CheckSig(
     try {
         std::array<uint8_t, 32> sighashArray;
         auto scriptBase = static_cast<const CScriptBase&>(scriptCode);
-        this->sighash(sighashArray.begin(), sighashArray.size(), this->tx, &scriptBase[0], scriptBase.size(), nHashType);
+        this->sighash(sighashArray.data(), sighashArray.size(), this->tx, &scriptBase[0], scriptBase.size(), nHashType);
         sighash = uint256::FromRawBytes(sighashArray);
     } catch (logic_error ex) {
         return false;