Import public keys in order

Do public key imports in the order that they are specified in the import
or in the descriptor range.

test/functional/wallet_importmulti.py

@@ -777,5 +777,30 @@ class ImportMultiTest(BitcoinTestFramework):
         assert_equal(result[0]['error']['code'], -8)
         assert_equal(result[0]['error']['message'], "Keys can only be imported to the keypool when private keys are disabled")
 
+        # Make sure ranged imports import keys in order
+        self.log.info('Key ranges should be imported in order')
+        wrpc = self.nodes[1].get_wallet_rpc("noprivkeys")
+        assert_equal(wrpc.getwalletinfo()["keypoolsize"], 0)
+        assert_equal(wrpc.getwalletinfo()["private_keys_enabled"], False)
+        xpub = "tpubDAXcJ7s7ZwicqjprRaEWdPoHKrCS215qxGYxpusRLLmJuT69ZSicuGdSfyvyKpvUNYBW1s2U3NSrT6vrCYB9e6nZUEvrqnwXPF8ArTCRXMY"
+        addresses = [
+            'bcrt1qtmp74ayg7p24uslctssvjm06q5phz4yrxucgnv', # m/0'/0'/0
+            'bcrt1q8vprchan07gzagd5e6v9wd7azyucksq2xc76k8', # m/0'/0'/1
+            'bcrt1qtuqdtha7zmqgcrr26n2rqxztv5y8rafjp9lulu', # m/0'/0'/2
+            'bcrt1qau64272ymawq26t90md6an0ps99qkrse58m640', # m/0'/0'/3
+            'bcrt1qsg97266hrh6cpmutqen8s4s962aryy77jp0fg0', # m/0'/0'/4
+        ]
+        result = wrpc.importmulti(
+            [{
+                'desc': 'wpkh([80002067/0h/0h]' + xpub + '/*)',
+                'keypool': True,
+                'timestamp': 'now',
+                'range' : {'start': 0, 'end': 4}
+            }]
+        )
+        for i in range(0, 5):
+            addr = wrpc.getnewaddress('', 'bech32')
+            assert_equal(addr, addresses[i])
+
 if __name__ == '__main__':
     ImportMultiTest().main()