Silent Payments: receiving

src/interfaces/chain.h

@@ -157,6 +157,7 @@ class Chain
     //! Return whether node has the block and optionally return block metadata
     //! or contents.
     virtual bool findBlock(const uint256& hash, const FoundBlock& block={}) = 0;
+    virtual bool getUndoBlock(const uint256& block_hash, CBlockUndo& blockUndo) = 0;
 
     //! Find first block in the chain with timestamp >= the given time
     //! and height >= than the given height, return false if there is no block

src/node/interfaces.cpp

@@ -563,6 +563,13 @@ class ChainImpl : public Chain
         WAIT_LOCK(cs_main, lock);
         return FillBlock(chainman().m_blockman.LookupBlockIndex(hash), block, lock, chainman().ActiveChain(), chainman().m_blockman);
     }
+    bool getUndoBlock(const uint256& block_hash, CBlockUndo& undoBlock) override
+    {
+        WAIT_LOCK(cs_main, lock);
+        const CBlockIndex* pindex{chainman().m_blockman.LookupBlockIndex(block_hash)};
+        if (!chainman().m_blockman.UndoReadFromDisk(undoBlock, *pindex)) return false;
+        return true;
+    }
     bool findFirstBlockWithTimeAndHeight(int64_t min_time, int min_height, const FoundBlock& block) override
     {
         WAIT_LOCK(cs_main, lock);

src/wallet/scriptpubkeyman.cpp

@@ -2821,4 +2821,17 @@ bool DescriptorScriptPubKeyMan::CanUpdateToWalletDescriptor(const WalletDescript
 
     return true;
 }
+
+std::vector<CKey> DescriptorScriptPubKeyMan::VerifySilentPaymentAddress(
+    std::vector<XOnlyPubKey>& tx_output_pub_keys,
+    const CPubKey& sender_pub_key,
+    const std::vector<COutPoint>& tx_outpoints)
+{
+    LOCK(cs_desc_man);
+    std::vector<CKey> raw_tr_keys;
+    LoadSilentRecipient();
+    assert(m_silent_recipient != nullptr);
+    m_silent_recipient->ComputeECDHSharedSecret(sender_pub_key, tx_outpoints);
+    return m_silent_recipient->ScanTxOutputs(tx_output_pub_keys);
+}
 } // namespace wallet

src/wallet/scriptpubkeyman.h

@@ -668,6 +668,8 @@ class DescriptorScriptPubKeyMan : public ScriptPubKeyMan
     bool GetDescriptorString(std::string& out, const bool priv) const;
 
     void UpgradeDescriptorCache();
+
+    std::vector<CKey> VerifySilentPaymentAddress(std::vector<XOnlyPubKey>& txOutputPubKeys, const CPubKey& senderPubKey, const std::vector<COutPoint>& tx_outpoints);
 };
 
 /** struct containing information needed for migrating legacy wallets to descriptor wallets */