Added checks for tx keys

src/crypto.h

@@ -20,6 +20,7 @@
 namespace p2pool {
 
 void generate_keys(hash& pub, hash& sec);
+bool check_keys(const hash& pub, const hash& sec);
 bool generate_key_derivation(const hash& key1, const hash& key2, hash& derivation);
 bool derive_public_key(const hash& derivation, size_t output_index, const hash& base, hash& derived_key);