create eth_getStorageAt prototype

proxy/plugin/solana_rest_api.py

@@ -195,6 +195,10 @@ def getBlockBySlot(self, slot, full):
         }
         return ret
 
+    def eth_getStorageAt(self, account, position, block_identifier):
+        print(f"eth_getStorageAt: {account}, {position}, {block_identifier}")
+        return 0
+
     def eth_getBlockByHash(self, trx_hash, full):
         """Returns information about a block by hash.
             trx_hash - Hash of a block.

proxy/test_eth_sendRawTransaction.py

@@ -428,6 +428,11 @@ def test_07_execute_long_transaction(self):
         print('times_to_calculate:', times_to_calculate)
         print('time_duration:', time_duration)
 
+    def test_get_storage_at(self):
+        proxy.eth.get_storage_at(self.storage_contract.address,
+                                 Web3.keccak("number"),
+                                 "latest")
+
 
 if __name__ == '__main__':
     unittest.main()