Merge #15930: rpc: Add balances RPC

facfb4111d14a3b06c46690a2cca7ca91cea8a96 rpc: Deprecate getunconfirmedbalance and getwalletinfo balances (MarcoFalke)
999931cf8f167c7547f1015cdf05437a460c27f0 rpc: Add getbalances RPC (MarcoFalke)
fad13e925e197163a942f3f0d1ba2c95a2b65a56 rpcwallet: Make helper methods const on CWallet (MarcoFalke)
fad40ec9151248c6e8225e14980424f581d23e02 wallet: Use IsValidNumArgs in getwalletinfo rpc (MarcoFalke)

Pull request description:

  This exposes the `CWallet::GetBalance()` struct over RPC.

  In the future, incorrectly named rpcs such as `getunconfirmedbalance` or rpcs redundant to this such as `getbalance` could be removed.

ACKs for commit facfb4:
  jnewbery:
    utACK facfb4111d14a3b06c46690a2cca7ca91cea8a96

Tree-SHA512: 1f54fedce55df9a8ea82d2b6265354b39a956072621876ebaee2355aac0e23c7b64340c3279502415598c095858529e18b50789be956250aafda1cd3a8d948a5

2 files changed, 82 insertions, 17 deletions

diff --git a/src/wallet/rpcwallet.cpp b/src/wallet/rpcwallet.cpp
index 5a22508c4b..76f59a7bb0 100644
--- a/src/wallet/rpcwallet.cpp
+++ b/src/wallet/rpcwallet.cpp
@@ -1,5 +1,5 @@
 // Copyright (c) 2010 Satoshi Nakamoto
-// Copyright (c) 2009-2018 The Bitcoin Core developers
+// Copyright (c) 2009-2019 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -9,7 +9,6 @@
 #include <core_io.h>
 #include <init.h>
 #include <interfaces/chain.h>
-#include <validation.h>
 #include <key_io.h>
 #include <net.h>
 #include <node/transaction.h>
@@ -27,10 +26,11 @@
 #include <timedata.h>
 #include <util/bip32.h>
 #include <util/fees.h>
-#include <util/system.h>
 #include <util/moneystr.h>
+#include <util/system.h>
 #include <util/url.h>
 #include <util/validation.h>
+#include <validation.h>
 #include <wallet/coincontrol.h>
 #include <wallet/feebumper.h>
 #include <wallet/psbtwallet.h>
@@ -70,14 +70,14 @@ std::shared_ptr<CWallet> GetWalletForJSONRPCRequest(const JSONRPCRequest& reques
     return wallets.size() == 1 || (request.fHelp && wallets.size() > 0) ? wallets[0] : nullptr;
 }
 
-std::string HelpRequiringPassphrase(CWallet * const pwallet)
+std::string HelpRequiringPassphrase(const CWallet* pwallet)
 {
     return pwallet && pwallet->IsCrypted()
         ? "\nRequires wallet passphrase to be set with walletpassphrase call."
         : "";
 }
 
-bool EnsureWalletIsAvailable(CWallet * const pwallet, bool avoidException)
+bool EnsureWalletIsAvailable(const CWallet* pwallet, bool avoidException)
 {
     if (pwallet) return true;
     if (avoidException) return false;
@@ -89,7 +89,7 @@ bool EnsureWalletIsAvailable(CWallet * const pwallet, bool avoidException)
         "Wallet file not specified (must request wallet RPC through /wallet/<filename> uri-path).");
 }
 
-void EnsureWalletIsUnlocked(CWallet * const pwallet)
+void EnsureWalletIsUnlocked(const CWallet* pwallet)
 {
     if (pwallet->IsLocked()) {
         throw JSONRPCError(RPC_WALLET_UNLOCK_NEEDED, "Error: Please enter the wallet passphrase with walletpassphrase first.");
@@ -785,7 +785,7 @@ static UniValue getunconfirmedbalance(const JSONRPCRequest &request)
     if (request.fHelp || request.params.size() > 0)
         throw std::runtime_error(
             RPCHelpMan{"getunconfirmedbalance",
-                "Returns the server's total unconfirmed balance\n",
+                "DEPRECATED\nIdentical to getbalances().mine.untrusted_pending\n",
                 {},
                 RPCResults{},
                 RPCExamples{""},
@@ -2373,6 +2373,68 @@ static UniValue settxfee(const JSONRPCRequest& request)
     return true;
 }
 
+static UniValue getbalances(const JSONRPCRequest& request)
+{
+    std::shared_ptr<CWallet> const rpc_wallet = GetWalletForJSONRPCRequest(request);
+    if (!EnsureWalletIsAvailable(rpc_wallet.get(), request.fHelp)) {
+        return NullUniValue;
+    }
+    CWallet& wallet = *rpc_wallet;
+
+    const RPCHelpMan help{
+        "getbalances",
+        "Returns an object with all balances in " + CURRENCY_UNIT + ".\n",
+        {},
+        RPCResult{
+            "{\n"
+            "    \"mine\": {                        (object) balances from outputs that the wallet can sign\n"
+            "      \"trusted\": xxx                 (numeric) trusted balance (outputs created by the wallet or confirmed outputs)\n"
+            "      \"untrusted_pending\": xxx       (numeric) untrusted pending balance (outputs created by others that are in the mempool)\n"
+            "      \"immature\": xxx                (numeric) balance from immature coinbase outputs\n"
+            "    },\n"
+            "    \"watchonly\": {                   (object) watchonly balances (not present if wallet does not watch anything)\n"
+            "      \"trusted\": xxx                 (numeric) trusted balance (outputs created by the wallet or confirmed outputs)\n"
+            "      \"untrusted_pending\": xxx       (numeric) untrusted pending balance (outputs created by others that are in the mempool)\n"
+            "      \"immature\": xxx                (numeric) balance from immature coinbase outputs\n"
+            "    },\n"
+            "}\n"},
+        RPCExamples{
+            HelpExampleCli("getbalances", "") +
+            HelpExampleRpc("getbalances", "")},
+    };
+
+    if (request.fHelp || !help.IsValidNumArgs(request.params.size())) {
+        throw std::runtime_error(help.ToString());
+    }
+
+    // Make sure the results are valid at least up to the most recent block
+    // the user could have gotten from another RPC command prior to now
+    wallet.BlockUntilSyncedToCurrentChain();
+
+    auto locked_chain = wallet.chain().lock();
+    LOCK(wallet.cs_wallet);
+
+    UniValue obj(UniValue::VOBJ);
+
+    const auto bal = wallet.GetBalance();
+    UniValue balances{UniValue::VOBJ};
+    {
+        UniValue balances_mine{UniValue::VOBJ};
+        balances_mine.pushKV("trusted", ValueFromAmount(bal.m_mine_trusted));
+        balances_mine.pushKV("untrusted_pending", ValueFromAmount(bal.m_mine_untrusted_pending));
+        balances_mine.pushKV("immature", ValueFromAmount(bal.m_mine_immature));
+        balances.pushKV("mine", balances_mine);
+    }
+    if (wallet.HaveWatchOnly()) {
+        UniValue balances_watchonly{UniValue::VOBJ};
+        balances_watchonly.pushKV("trusted", ValueFromAmount(bal.m_watchonly_trusted));
+        balances_watchonly.pushKV("untrusted_pending", ValueFromAmount(bal.m_watchonly_untrusted_pending));
+        balances_watchonly.pushKV("immature", ValueFromAmount(bal.m_watchonly_immature));
+        balances.pushKV("watchonly", balances_watchonly);
+    }
+    return balances;
+}
+
 static UniValue getwalletinfo(const JSONRPCRequest& request)
 {
     std::shared_ptr<CWallet> const wallet = GetWalletForJSONRPCRequest(request);
@@ -2382,18 +2444,16 @@ static UniValue getwalletinfo(const JSONRPCRequest& request)
         return NullUniValue;
     }
 
-    if (request.fHelp || request.params.size() != 0)
-        throw std::runtime_error(
-            RPCHelpMan{"getwalletinfo",
+    const RPCHelpMan help{"getwalletinfo",
                 "Returns an object containing various wallet state info.\n",
                 {},
                 RPCResult{
             "{\n"
             "  \"walletname\": xxxxx,               (string) the wallet name\n"
             "  \"walletversion\": xxxxx,            (numeric) the wallet version\n"
-            "  \"balance\": xxxxxxx,                (numeric) the total confirmed balance of the wallet in " + CURRENCY_UNIT + "\n"
-            "  \"unconfirmed_balance\": xxx,        (numeric) the total unconfirmed balance of the wallet in " + CURRENCY_UNIT + "\n"
-            "  \"immature_balance\": xxxxxx,        (numeric) the total immature balance of the wallet in " + CURRENCY_UNIT + "\n"
+            "  \"balance\": xxxxxxx,                (numeric) DEPRECATED. Identical to getbalances().mine.trusted\n"
+            "  \"unconfirmed_balance\": xxx,        (numeric) DEPRECATED. Identical to getbalances().mine.untrusted_pending\n"
+            "  \"immature_balance\": xxxxxx,        (numeric) DEPRECATED. Identical to getbalances().mine.immature\n"
             "  \"txcount\": xxxxxxx,                (numeric) the total number of transactions in the wallet\n"
             "  \"keypoololdest\": xxxxxx,           (numeric) the timestamp (seconds since Unix epoch) of the oldest pre-generated key in the key pool\n"
             "  \"keypoolsize\": xxxx,               (numeric) how many new keys are pre-generated (only counts external keys)\n"
@@ -2408,7 +2468,11 @@ static UniValue getwalletinfo(const JSONRPCRequest& request)
                     HelpExampleCli("getwalletinfo", "")
             + HelpExampleRpc("getwalletinfo", "")
                 },
-            }.ToString());
+    };
+
+    if (request.fHelp || !help.IsValidNumArgs(request.params.size())) {
+        throw std::runtime_error(help.ToString());
+    }
 
     // Make sure the results are valid at least up to the most recent block
     // the user could have gotten from another RPC command prior to now
@@ -4073,6 +4137,7 @@ static const CRPCCommand commands[] =
     { "wallet",             "getreceivedbylabel",               &getreceivedbylabel,            {"label","minconf"} },
     { "wallet",             "gettransaction",                   &gettransaction,                {"txid","include_watchonly"} },
     { "wallet",             "getunconfirmedbalance",            &getunconfirmedbalance,         {} },
+    { "wallet",             "getbalances",                      &getbalances,                   {} },
     { "wallet",             "getwalletinfo",                    &getwalletinfo,                 {} },
     { "wallet",             "importaddress",                    &importaddress,                 {"address","label","rescan","p2sh"} },
     { "wallet",             "importmulti",                      &importmulti,                   {"requests","options"} },
diff --git a/src/wallet/rpcwallet.h b/src/wallet/rpcwallet.h
index 7cf607ccc7..90617472cc 100644
--- a/src/wallet/rpcwallet.h
+++ b/src/wallet/rpcwallet.h
@@ -31,9 +31,9 @@ void RegisterWalletRPCCommands(interfaces::Chain& chain, std::vector<std::unique
  */
 std::shared_ptr<CWallet> GetWalletForJSONRPCRequest(const JSONRPCRequest& request);
 
-std::string HelpRequiringPassphrase(CWallet *);
-void EnsureWalletIsUnlocked(CWallet *);
-bool EnsureWalletIsAvailable(CWallet *, bool avoidException);
+std::string HelpRequiringPassphrase(const CWallet*);
+void EnsureWalletIsUnlocked(const CWallet*);
+bool EnsureWalletIsAvailable(const CWallet*, bool avoidException);
 
 UniValue getaddressinfo(const JSONRPCRequest& request);
 UniValue signrawtransactionwithwallet(const JSONRPCRequest& request);