test: Fix dynamically_smth_masternode helpers, extend feature_dip3_v19.py (#5402)

## Issue being fixed or feature implemented
fix a couple of issues in helpers, extend feature_dip3_v19.py to check
more after v19 fork

## What was done?
pls see individual PRs


## How Has This Been Tested?
run tests

## Breaking Changes
n/a

## Checklist:
- [x] I have performed a self-review of my own code
- [x] I have commented my code, particularly in hard-to-understand areas
- [ ] I have added or updated relevant unit/integration/functional/e2e
tests
- [ ] I have made corresponding changes to the documentation
- [x] I have assigned this pull request to a milestone _(for repository
code-owners and collaborators only)_

test/functional/feature_dip3_v19.py

@@ -101,8 +101,22 @@ class DIP3V19Test(DashTestFramework):
         self.test_revoke_protx(revoke_protx, revoke_keyoperator)
 
         self.mine_quorum(llmq_type_name='llmq_test', llmq_type=100)
+        # revoking a MN results in disconnects, reconnect it back to let sync_blocks finish correctly
+        self.connect_nodes(hpmn_info_3.nodeIdx, 0)
 
-        return
+        self.log.info("Checking that adding more regular MNs after v19 doesn't break DKGs and IS/CLs")
+
+        for i in range(6):
+            new_mn = self.dynamically_add_masternode(hpmn=False, rnd=(10 + i))
+            assert new_mn is not None
+
+        # mine more quorums and make sure everything still works
+        prev_quorum = None
+        for _ in range(5):
+            quorum = self.mine_quorum()
+            assert prev_quorum != quorum
+
+        self.wait_for_chainlocked_block_all_nodes(self.nodes[0].getbestblockhash())
 
     def test_revoke_protx(self, revoke_protx, revoke_keyoperator):
         funds_address = self.nodes[0].getnewaddress()

test/functional/test_framework/test_framework.py

@@ -1067,7 +1067,7 @@ class DashTestFramework(BitcoinTestFramework):
             created_mn_info = self.dynamically_prepare_masternode(mn_idx, node_p2p_port, hpmn, rnd)
             protx_success = True
         except:
-            self.log.info("protx_hpmn rejected")
+            self.log.info("dynamically_prepare_masternode failed")
 
         assert_equal(protx_success, not should_be_rejected)
 
@@ -1083,7 +1083,7 @@ class DashTestFramework(BitcoinTestFramework):
 
         for mn_info in self.mninfo:
             if mn_info.proTxHash == created_mn_info.proTxHash:
-                mn_info.nodeIx = mn_idx
+                mn_info.nodeIdx = mn_idx
                 mn_info.node = self.nodes[mn_idx]
 
         self.connect_nodes(mn_idx, 0)
@@ -1104,8 +1104,8 @@ class DashTestFramework(BitcoinTestFramework):
         reward_address = self.nodes[0].getnewaddress()
 
         platform_node_id = hash160(b'%d' % rnd).hex() if rnd is not None else hash160(b'%d' % node_p2p_port).hex()
-        platform_p2p_port = '%d' % (node_p2p_port + 101) if hpmn else ''
-        platform_http_port = '%d' % (node_p2p_port + 102) if hpmn else ''
+        platform_p2p_port = '%d' % (node_p2p_port + 101)
+        platform_http_port = '%d' % (node_p2p_port + 102)
 
         collateral_amount = 4000 if hpmn else 1000
         outputs = {collateral_address: collateral_amount, funds_address: 1}
@@ -1126,8 +1126,12 @@ class DashTestFramework(BitcoinTestFramework):
         ipAndPort = '127.0.0.1:%d' % node_p2p_port
         operatorReward = idx
 
-        register_rpc = 'register_hpmn' if hpmn else 'register'
-        protx_result = self.nodes[0].protx(register_rpc, collateral_txid, collateral_vout, ipAndPort, owner_address, bls['public'], voting_address, operatorReward, reward_address, platform_node_id, platform_p2p_port, platform_http_port, funds_address, True)
+        protx_result = None
+        if hpmn:
+            protx_result = self.nodes[0].protx("register_hpmn", collateral_txid, collateral_vout, ipAndPort, owner_address, bls['public'], voting_address, operatorReward, reward_address, platform_node_id, platform_p2p_port, platform_http_port, funds_address, True)
+        else:
+            protx_result = self.nodes[0].protx("register", collateral_txid, collateral_vout, ipAndPort, owner_address, bls['public'], voting_address, operatorReward, reward_address, funds_address, True)
+
         self.wait_for_instantlock(protx_result, self.nodes[0])
         tip = self.nodes[0].generate(1)[0]
         self.sync_all(self.nodes)