JSON: deprecate printing msat fields as strings.

This changes many fields: in non-deprecated mode, they're now raw integers.
This was always the intention, but the transition was never completed.

Suggested-By: @ShahanaFarooqui
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Changelog-Changed: JSON-RPC: "_msat" fields can be raw numbers, not "123msat" strings (please handle both!)
Changelog-Deprecated: JSON-RPC: "_msat" fields as "123msat" strings (will be only numbers)

tests/test_plugin.py

@@ -626,11 +626,11 @@ def test_openchannel_hook(node_factory, bitcoind):
     # Make sure plugin got all the vars we expect
     expected = {
         'channel_flags': '1',
-        'dust_limit_msat': '546000msat',
-        'htlc_minimum_msat': '0msat',
+        'dust_limit_msat': 546000,
+        'htlc_minimum_msat': 0,
         'id': l1.info['id'],
         'max_accepted_htlcs': '483',
-        'max_htlc_value_in_flight_msat': '18446744073709551615msat',
+        'max_htlc_value_in_flight_msat': 18446744073709551615,
         'to_self_delay': '5',
     }
 
@@ -643,15 +643,15 @@ def test_openchannel_hook(node_factory, bitcoind):
             'feerate_our_max': '150000',
             'feerate_our_min': '1875',
             'locktime': '.*',
-            'their_funding_msat': '100000000msat',
-            'channel_max_msat': '16777215000msat',
+            'their_funding_msat': 100000000,
+            'channel_max_msat': 16777215000,
         })
     else:
         expected.update({
-            'channel_reserve_msat': '1000000msat',
+            'channel_reserve_msat': 1000000,
             'feerate_per_kw': '7500',
-            'funding_msat': '100000000msat',
-            'push_msat': '0msat',
+            'funding_msat': 100000000,
+            'push_msat': 0,
         })
 
     l2.daemon.wait_for_log('reject_odd_funding_amounts.py: {} VARS'.format(len(expected)))
@@ -1148,7 +1148,7 @@ def test_htlc_accepted_hook_forward_restart(node_factory, executor):
     assert onion['type'] == 'tlv'
     assert re.match(r'^11020203e80401..0608................$', onion['payload'])
     assert len(onion['shared_secret']) == 64
-    assert onion['forward_msat'] == '1000msat'
+    assert onion['forward_msat'] == Millisatoshi(1000)
     assert len(onion['next_onion']) == 2 * (1300 + 32 + 33 + 1)
 
     f1.result()