Merge #15750: [rpc] Remove the addresses field from the getaddressinfo return object

b4338c1 [rpc] Remove the addresses field from the getaddressinfo return object (John Newbery)

Pull request description:

  The "addresses" field was confusing because it refered to public keys
  using their P2PKH address.  It was included in the return object when
  needed for backward compatibility. Remove that compatibility now that
  the -deprecatedrpc=validateaddress option has been removed.

  New applications should use the 'embedded'->'address' field for P2SH or
  P2WSH wrapped addresses, and 'pubkeys' for inspecting multisig
  participants.

ACKs for commit b4338c:
  jonatack:
    ACK bitcoin/bitcoin@b4338c1. Tests [gist](https://gist.github.com/jonatack/31915e290bb1be39b9769dc9357385ca).

Tree-SHA512: 2c207510e565df600428838bfc6db5211fa06aaace365e31cbd74f1d2376b598675cb90df2fc1440858d49b22095aaa9d6b9ce3de0aff22417fe72cc6a6a321f

Author: MarcoFalke

src/wallet/rpcwallet.cpp

@@ -3415,7 +3415,7 @@ class DescribeWalletAddressVisitor : public boost::static_visitor<UniValue>
 public:
     CWallet * const pwallet;
 
-    void ProcessSubScript(const CScript& subscript, UniValue& obj, bool include_addresses = false) const
+    void ProcessSubScript(const CScript& subscript, UniValue& obj) const
     {
         // Always present: script type and redeemscript
         std::vector<std::vector<unsigned char>> solutions_data;
@@ -3424,7 +3424,6 @@ class DescribeWalletAddressVisitor : public boost::static_visitor<UniValue>
         obj.pushKV("hex", HexStr(subscript.begin(), subscript.end()));
 
         CTxDestination embedded;
-        UniValue a(UniValue::VARR);
         if (ExtractDestination(subscript, embedded)) {
             // Only when the script corresponds to an address.
             UniValue subobj(UniValue::VOBJ);
@@ -3437,25 +3436,17 @@ class DescribeWalletAddressVisitor : public boost::static_visitor<UniValue>
             // Always report the pubkey at the top level, so that `getnewaddress()['pubkey']` always works.
             if (subobj.exists("pubkey")) obj.pushKV("pubkey", subobj["pubkey"]);
             obj.pushKV("embedded", std::move(subobj));
-            if (include_addresses) a.push_back(EncodeDestination(embedded));
         } else if (which_type == TX_MULTISIG) {
             // Also report some information on multisig scripts (which do not have a corresponding address).
             // TODO: abstract out the common functionality between this logic and ExtractDestinations.
             obj.pushKV("sigsrequired", solutions_data[0][0]);
             UniValue pubkeys(UniValue::VARR);
             for (size_t i = 1; i < solutions_data.size() - 1; ++i) {
                 CPubKey key(solutions_data[i].begin(), solutions_data[i].end());
-                if (include_addresses) a.push_back(EncodeDestination(key.GetID()));
                 pubkeys.push_back(HexStr(key.begin(), key.end()));
             }
             obj.pushKV("pubkeys", std::move(pubkeys));
         }
-
-        // The "addresses" field is confusing because it refers to public keys using their P2PKH address.
-        // For that reason, only add the 'addresses' field when needed for backward compatibility. New applications
-        // can use the 'embedded'->'address' field for P2SH or P2WSH wrapped addresses, and 'pubkeys' for
-        // inspecting multisig participants.
-        if (include_addresses) obj.pushKV("addresses", std::move(a));
     }
 
     explicit DescribeWalletAddressVisitor(CWallet* _pwallet) : pwallet(_pwallet) {}
@@ -3478,7 +3469,7 @@ class DescribeWalletAddressVisitor : public boost::static_visitor<UniValue>
         UniValue obj(UniValue::VOBJ);
         CScript subscript;
         if (pwallet && pwallet->GetCScript(scriptID, subscript)) {
-            ProcessSubScript(subscript, obj, pwallet->chain().rpcEnableDeprecated("validateaddress"));
+            ProcessSubScript(subscript, obj);
         }
         return obj;
     }