Switch to 100% for the HD internal keypool size

src/wallet/rpcwallet.cpp

@@ -2424,8 +2424,8 @@ UniValue getwalletinfo(const JSONRPCRequest& request)
             "  \"immature_balance\": xxxxxx,      (numeric) the total immature balance of the wallet in " + CURRENCY_UNIT + "\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 (excluding internal-/chnage-output keys)\n"
+            "  \"keypoolsize\": xxxx,             (numeric) how many new keys are pre-generated (only counts external keys)\n"
-            "  \"keypoolsize_hd_internal\": xxxx, (numeric) how many new keys are pre-generated for internal use (change outputs, 20% of the -keypoolsize target, only appears if HD is enabled)\n"
+            "  \"keypoolsize_hd_internal\": xxxx, (numeric) how many new keys are pre-generated for internal use (used for change outputs, only appears if HD is enabled otherwise there is no need for internal keys)\n"
             "  \"unlocked_until\": ttt,           (numeric) the timestamp in seconds since epoch (midnight Jan 1 1970 GMT) that the wallet is unlocked for transfers, or 0 if the wallet is locked\n"
             "  \"paytxfee\": x.xxxx,              (numeric) the transaction fee configuration, set in " + CURRENCY_UNIT + "/kB\n"
             "  \"hdmasterkeyid\": \"<hash160>\"     (string) the Hash160 of the HD master pubkey\n"

src/wallet/wallet.cpp

@@ -2946,13 +2946,11 @@ bool CWallet::TopUpKeyPool(unsigned int kpSize)
             nTargetSize = std::max(GetArg("-keypool", DEFAULT_KEYPOOL_SIZE), (int64_t) 0);
 
         // count amount of available keys (internal, external)
-        // make sure the keypool of external keys fits the user selected target (-keypool)
+        // make sure the keypool of external and internal keys fits the user selected target (-keypool)
-        // generate +20% internal keys (minimum 2 keys)
         int64_t amountExternal = KeypoolCountExternalKeys();
         int64_t amountInternal = setKeyPool.size() - amountExternal;
-        int64_t targetInternal = std::max((int64_t)ceil(nTargetSize * 0.2), (int64_t) 2);
         int64_t missingExternal = std::max(std::max((int64_t) nTargetSize, (int64_t) 1) - amountExternal, (int64_t) 0);
-        int64_t missingInternal = std::max(targetInternal - amountInternal, (int64_t) 0);
+        int64_t missingInternal = std::max(std::max((int64_t) nTargetSize, (int64_t) 1) - amountInternal, (int64_t) 0);
 
         if (!IsHDEnabled() || !CanSupportFeature(FEATURE_HD_SPLIT))
         {

test/functional/fundrawtransaction.py

@@ -468,7 +468,6 @@ class RawTransactionsTest(BitcoinTestFramework):
         # drain the keypool
         self.nodes[1].getnewaddress()
         self.nodes[1].getrawchangeaddress()
-        self.nodes[1].getrawchangeaddress()
         inputs = []
         outputs = {self.nodes[0].getnewaddress():1.1}
         rawTx = self.nodes[1].createrawtransaction(inputs, outputs)

test/functional/keypool.py

@@ -29,17 +29,21 @@ class KeyPoolTest(BitcoinTestFramework):
         assert(addr_data['hdmasterkeyid'] == wallet_info['hdmasterkeyid'])
         assert_raises_jsonrpc(-12, "Error: Keypool ran out, please call keypoolrefill first", nodes[0].getnewaddress)
 
-        # put six (plus 2) new keys in the keypool (100% external-, +20% internal-keys, 2 in min)
+        # put six (plus 2) new keys in the keypool (100% external-, +100% internal-keys, 1 in min)
         nodes[0].walletpassphrase('test', 12000)
         nodes[0].keypoolrefill(6)
         nodes[0].walletlock()
         wi = nodes[0].getwalletinfo()
-        assert_equal(wi['keypoolsize_hd_internal'], 2)
+        assert_equal(wi['keypoolsize_hd_internal'], 6)
         assert_equal(wi['keypoolsize'], 6)
 
         # drain the internal keys
         nodes[0].getrawchangeaddress()
         nodes[0].getrawchangeaddress()
+        nodes[0].getrawchangeaddress()
+        nodes[0].getrawchangeaddress()
+        nodes[0].getrawchangeaddress()
+        nodes[0].getrawchangeaddress()
         addr = set()
         # the next one should fail
         assert_raises_jsonrpc(-12, "Keypool ran out", nodes[0].getrawchangeaddress)
@@ -72,7 +76,7 @@ class KeyPoolTest(BitcoinTestFramework):
         nodes[0].walletpassphrase('test', 100)
         nodes[0].keypoolrefill(100)
         wi = nodes[0].getwalletinfo()
-        assert_equal(wi['keypoolsize_hd_internal'], 20)
+        assert_equal(wi['keypoolsize_hd_internal'], 100)
         assert_equal(wi['keypoolsize'], 100)
 
     def __init__(self):

test/functional/wallet-dump.py

@@ -88,7 +88,7 @@ class WalletDumpTest(BitcoinTestFramework):
             read_dump(tmpdir + "/node0/wallet.unencrypted.dump", addrs, None)
         assert_equal(found_addr, test_addr_count)  # all keys must be in the dump
         assert_equal(found_addr_chg, 50)  # 50 blocks where mined
-        assert_equal(found_addr_rsv, 90*1.2) # 90 keys plus 20% internal keys
+        assert_equal(found_addr_rsv, 90*2) # 90 keys plus 100% internal keys
 
         #encrypt wallet, restart, unlock and dump
         self.nodes[0].encryptwallet('test')
@@ -102,8 +102,8 @@ class WalletDumpTest(BitcoinTestFramework):
         found_addr, found_addr_chg, found_addr_rsv, hd_master_addr_enc = \
             read_dump(tmpdir + "/node0/wallet.encrypted.dump", addrs, hd_master_addr_unenc)
         assert_equal(found_addr, test_addr_count)
-        assert_equal(found_addr_chg, 90*1.2 + 50)  # old reserve keys are marked as change now
+        assert_equal(found_addr_chg, 90*2 + 50)  # old reserve keys are marked as change now
-        assert_equal(found_addr_rsv, 90*1.2) 
+        assert_equal(found_addr_rsv, 90*2) 
 
 if __name__ == '__main__':
     WalletDumpTest().main ()