Merge #19200: rpc: remove deprecated getaddressinfo fields

bc01f7ae0538d3c647ce8dfbc29f7914d5df3fbb doc: release note for rpc getaddressinfo removals (Jon Atack)
90e989390ee50633fff0e4f210a1ea23ff00e012 rpc: getaddressinfo RPCResult fixup (Jon Atack)
a8507c99da10791aa69ca277128e06753942e976 rpc: remove deprecated getaddressinfo `labels: purpose` (Jon Atack)
645a8653c895e4fc7717e9e5ac045612b5deaa60 rpc: remove deprecated getaddressinfo `label` field (Jon Atack)

Pull request description:

  These were deprecated in #17578 and #17585, with expected 0.21 removal notified in the 0.20 release notes.
  ```
  - The `getaddressinfo` RPC has had its `label` field deprecated
    (re-enable for this release using the configuration parameter
    `-deprecatedrpc=label`).  The `labels` field is altered from returning
    JSON objects to returning a JSON array of label names (re-enable
    previous behavior for this release using the configuration parameter
    `-deprecatedrpc=labelspurpose`).  Backwards compatibility using the
    deprecated configuration parameters is expected to be dropped in the
    0.21 release.  (#17585, #17578)
  ```

ACKs for top commit:
  Sjors:
    utACK bc01f7a
  adamjonas:
    utACK bc01f7a
  meshcollider:
    utACK bc01f7ae0538d3c647ce8dfbc29f7914d5df3fbb

Tree-SHA512: ae1af381e32c4c3bde8b061a56382838513a9a82c88767843cdeae3a2ab8aa7d8c2e66e106d2b31ea07d74bb80c191a2f842c9aaecc7c5438ad9a9bc66d1b251

5 files changed, 12 insertions, 118 deletions

diff --git a/doc/release-notes-19200.md b/doc/release-notes-19200.md
new file mode 100644
index 0000000000..4670cb2e75
--- /dev/null
+++ b/doc/release-notes-19200.md
@@ -0,0 +1,7 @@
+## Wallet
+
+- Backwards compatibility has been dropped for two `getaddressinfo` RPC
+  deprecations, as notified in the 0.20 release notes. The deprecated `label`
+  field has been removed as well as the deprecated `labels` behavior of
+  returning a JSON object containing `name` and `purpose` key-value pairs. Since
+  0.20, the `labels` field returns a JSON array of label names. (#19200)
diff --git a/src/wallet/rpcwallet.cpp b/src/wallet/rpcwallet.cpp
index e09157fb5b..72998c30fd 100644
--- a/src/wallet/rpcwallet.cpp
+++ b/src/wallet/rpcwallet.cpp
@@ -3631,12 +3631,10 @@ UniValue getaddressinfo(const JSONRPCRequest& request)
                         {RPCResult::Type::STR_HEX, "pubkey", /* optional */ true, "The hex value of the raw public key for single-key addresses (possibly embedded in P2SH or P2WSH)."},
                         {RPCResult::Type::OBJ, "embedded", /* optional */ true, "Information about the address embedded in P2SH or P2WSH, if relevant and known.",
                         {
-                            {RPCResult::Type::ELISION, "", "Includes all\n"
-            "                                                         getaddressinfo output fields for the embedded address, excluding metadata (timestamp, hdkeypath,\n"
-                            "hdseedid) and relation to the wallet (ismine, iswatchonly)."},
+                            {RPCResult::Type::ELISION, "", "Includes all getaddressinfo output fields for the embedded address, excluding metadata (timestamp, hdkeypath, hdseedid)\n"
+                            "and relation to the wallet (ismine, iswatchonly)."},
                         }},
                         {RPCResult::Type::BOOL, "iscompressed", /* optional */ true, "If the pubkey is compressed."},
-                        {RPCResult::Type::STR, "label", "DEPRECATED. The label associated with the address. Defaults to \"\". Replaced by the labels array below."},
                         {RPCResult::Type::NUM_TIME, "timestamp", /* optional */ true, "The creation time of the key, if available, expressed in " + UNIX_EPOCH_TIME + "."},
                         {RPCResult::Type::STR, "hdkeypath", /* optional */ true, "The HD keypath, if the key is HD and available."},
                         {RPCResult::Type::STR_HEX, "hdseedid", /* optional */ true, "The Hash160 of the HD seed."},
@@ -3644,12 +3642,7 @@ UniValue getaddressinfo(const JSONRPCRequest& request)
                         {RPCResult::Type::ARR, "labels", "Array of labels associated with the address. Currently limited to one label but returned\n"
                             "as an array to keep the API stable if multiple labels are enabled in the future.",
                         {
-                            {RPCResult::Type::STR, "label name", "The label name. Defaults to \"\"."},
-                            {RPCResult::Type::OBJ, "", "label data, DEPRECATED, will be removed in 0.21. To re-enable, launch bitcoind with `-deprecatedrpc=labelspurpose`",
-                            {
-                                {RPCResult::Type::STR, "name", "The label name. Defaults to \"\"."},
-                                {RPCResult::Type::STR, "purpose", "The purpose of the associated address (send or receive)."},
-                            }},
+                            {RPCResult::Type::STR, "label name", "Label name (defaults to \"\")."},
                         }},
                     }
                 },
@@ -3695,14 +3688,6 @@ UniValue getaddressinfo(const JSONRPCRequest& request)
     UniValue detail = DescribeWalletAddress(pwallet, dest);
     ret.pushKVs(detail);
 
-    // DEPRECATED: Return label field if existing. Currently only one label can
-    // be associated with an address, so the label should be equivalent to the
-    // value of the name key/value pair in the labels array below.
-    const auto* address_book_entry = pwallet->FindAddressBookEntry(dest);
-    if (pwallet->chain().rpcEnableDeprecated("label") && address_book_entry) {
-        ret.pushKV("label", address_book_entry->GetLabel());
-    }
-
     ret.pushKV("ischange", pwallet->IsChange(scriptPubKey));
 
     ScriptPubKeyMan* spk_man = pwallet->GetScriptPubKeyMan(scriptPubKey);
@@ -3723,14 +3708,9 @@ UniValue getaddressinfo(const JSONRPCRequest& request)
     // stable if we allow multiple labels to be associated with an address in
     // the future.
     UniValue labels(UniValue::VARR);
+    const auto* address_book_entry = pwallet->FindAddressBookEntry(dest);
     if (address_book_entry) {
-        // DEPRECATED: The previous behavior of returning an array containing a
-        // JSON object of `name` and `purpose` key/value pairs is deprecated.
-        if (pwallet->chain().rpcEnableDeprecated("labelspurpose")) {
-            labels.push_back(AddressBookDataToJSON(*address_book_entry, true));
-        } else {
-            labels.push_back(address_book_entry->GetLabel());
-        }
+        labels.push_back(address_book_entry->GetLabel());
     }
     ret.pushKV("labels", std::move(labels));
 
diff --git a/test/functional/rpc_getaddressinfo_label_deprecation.py b/test/functional/rpc_getaddressinfo_label_deprecation.py
deleted file mode 100755
index 09545ebce7..0000000000
--- a/test/functional/rpc_getaddressinfo_label_deprecation.py
+++ /dev/null
@@ -1,43 +0,0 @@
-#!/usr/bin/env python3
-# Copyright (c) 2020-2019 The Bitcoin Core developers
-# Distributed under the MIT software license, see the accompanying
-# file COPYING or http://www.opensource.org/licenses/mit-license.php.
-"""
-Test deprecation of the RPC getaddressinfo `label` field. It has been
-superseded by the `labels` field.
-
-"""
-from test_framework.test_framework import BitcoinTestFramework
-
-class GetAddressInfoLabelDeprecationTest(BitcoinTestFramework):
-    def set_test_params(self):
-        self.num_nodes = 2
-        self.setup_clean_chain = False
-        # Start node[0] with -deprecatedrpc=label, and node[1] without.
-        self.extra_args = [["-deprecatedrpc=label"], []]
-
-    def skip_test_if_missing_module(self):
-        self.skip_if_no_wallet()
-
-    def test_label_with_deprecatedrpc_flag(self):
-        self.log.info("Test getaddressinfo label with -deprecatedrpc flag")
-        node = self.nodes[0]
-        address = node.getnewaddress()
-        info = node.getaddressinfo(address)
-        assert "label" in info
-
-    def test_label_without_deprecatedrpc_flag(self):
-        self.log.info("Test getaddressinfo label without -deprecatedrpc flag")
-        node = self.nodes[1]
-        address = node.getnewaddress()
-        info = node.getaddressinfo(address)
-        assert "label" not in info
-
-    def run_test(self):
-        """Test getaddressinfo label with and without -deprecatedrpc flag."""
-        self.test_label_with_deprecatedrpc_flag()
-        self.test_label_without_deprecatedrpc_flag()
-
-
-if __name__ == '__main__':
-    GetAddressInfoLabelDeprecationTest().main()
diff --git a/test/functional/rpc_getaddressinfo_labels_purpose_deprecation.py b/test/functional/rpc_getaddressinfo_labels_purpose_deprecation.py
deleted file mode 100755
index 903f5536b9..0000000000
--- a/test/functional/rpc_getaddressinfo_labels_purpose_deprecation.py
+++ /dev/null
@@ -1,48 +0,0 @@
-#!/usr/bin/env python3
-# Copyright (c) 2020 The Bitcoin Core developers
-# Distributed under the MIT software license, see the accompanying
-# file COPYING or http://www.opensource.org/licenses/mit-license.php.
-"""
-Test deprecation of RPC getaddressinfo `labels` returning an array
-containing a JSON object of `name` and purpose` key-value pairs. It now
-returns an array containing only the label name.
-
-"""
-from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import assert_equal
-
-LABELS_TO_TEST = frozenset({"" , "New 𝅘𝅥𝅯 $<#>&!рыба Label"})
-
-class GetAddressInfoLabelsPurposeDeprecationTest(BitcoinTestFramework):
-    def set_test_params(self):
-        self.num_nodes = 2
-        self.setup_clean_chain = False
-        # Start node[0] with -deprecatedrpc=labelspurpose and node[1] without.
-        self.extra_args = [["-deprecatedrpc=labelspurpose"], []]
-
-    def skip_test_if_missing_module(self):
-        self.skip_if_no_wallet()
-
-    def test_labels(self, node_num, label_name, expected_value):
-        node = self.nodes[node_num]
-        address = node.getnewaddress()
-        if label_name != "":
-            node.setlabel(address, label_name)
-            self.log.info("  set label to {}".format(label_name))
-        labels = node.getaddressinfo(address)["labels"]
-        self.log.info("  labels = {}".format(labels))
-        assert_equal(labels, expected_value)
-
-    def run_test(self):
-        """Test getaddressinfo labels with and without -deprecatedrpc flag."""
-        self.log.info("Test getaddressinfo labels with -deprecatedrpc flag")
-        for label in LABELS_TO_TEST:
-            self.test_labels(node_num=0, label_name=label, expected_value=[{"name": label, "purpose": "receive"}])
-
-        self.log.info("Test getaddressinfo labels without -deprecatedrpc flag")
-        for label in LABELS_TO_TEST:
-            self.test_labels(node_num=1, label_name=label, expected_value=[label])
-
-
-if __name__ == '__main__':
-    GetAddressInfoLabelsPurposeDeprecationTest().main()
diff --git a/test/functional/test_runner.py b/test/functional/test_runner.py
index 79a172706c..41f9bde183 100755
--- a/test/functional/test_runner.py
+++ b/test/functional/test_runner.py
@@ -242,8 +242,6 @@ BASE_SCRIPTS = [
     'p2p_permissions.py',
     'feature_blocksdir.py',
     'feature_config_args.py',
-    'rpc_getaddressinfo_labels_purpose_deprecation.py',
-    'rpc_getaddressinfo_label_deprecation.py',
     'rpc_getdescriptorinfo.py',
     'rpc_help.py',
     'feature_help.py',