Function to check if a peer has a ledger.

src/Peer.cpp

@@ -1113,6 +1113,11 @@ void Peer::recvLedger(newcoin::TMLedgerData& packet)
 		punishPeer(PP_UNWANTED_DATA);
 }
 
+bool Peer::hasLedger(const uint256& hash) const
+{
+	return (hash == mClosedLedgerHash) || (hash == mPreviousLedgerHash);
+}
+
 // Get session information we can sign to prevent man in the middle attack.
 // (both sides get the same information, neither side controls it)
 void Peer::getSessionCookie(std::string& strDst)

src/Peer.h

@@ -159,6 +159,7 @@ public:
 	static PackedMessage::pointer createGetFullLedger(uint256& hash);
 
 	uint256 getClosedLedgerHash() const { return mClosedLedgerHash; }
+	bool hasLedger(const uint256& hash) const;
 	NewcoinAddress getNodePublic() const { return mNodePublic; }
 	void cycleStatus() { mPreviousLedgerHash = mClosedLedgerHash; mClosedLedgerHash.zero(); }
 };