From 4b89f01d727433f02cc8ff72799e0d0a7e6ceafe Mon Sep 17 00:00:00 2001 From: Ryan Havar Date: Mon, 7 Sep 2015 23:12:25 +0000 Subject: [PATCH 1/2] Default fPayAtLeastCustomFee to false This allows for much finer control of the transaction fees per kilobyte as it prevent small transactions using a fee that is more appropriate for one that is of a kilobyte. This also allows controlling the fee per kilobyte over rpc such that: bitcoin-cli settxfee `bitcoin-cli estimatefee 2` would make sense, while currently it grossly fails often by a factor of x3 --- src/wallet/wallet.cpp | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/wallet/wallet.cpp b/src/wallet/wallet.cpp index 69b163ebc..b062226dd 100644 --- a/src/wallet/wallet.cpp +++ b/src/wallet/wallet.cpp @@ -41,7 +41,7 @@ CAmount maxTxFee = DEFAULT_TRANSACTION_MAXFEE; unsigned int nTxConfirmTarget = DEFAULT_TX_CONFIRM_TARGET; bool bSpendZeroConfChange = DEFAULT_SPEND_ZEROCONF_CHANGE; bool fSendFreeTransactions = DEFAULT_SEND_FREE_TRANSACTIONS; -bool fPayAtLeastCustomFee = true; +bool fPayAtLeastCustomFee = false; /** * Fees smaller than this (in satoshi) are considered zero fee (for transaction creation) From fa506c0c9b3928843704c666909c0b0c5af2f9a0 Mon Sep 17 00:00:00 2001 From: MarcoFalke Date: Mon, 21 Sep 2015 12:49:13 +0200 Subject: [PATCH 2/2] [wallet] Add rpc tests to verify fee calculations --- qa/rpc-tests/test_framework/util.py | 3 +++ qa/rpc-tests/wallet.py | 39 ++++++++++++++++++++--------- 2 files changed, 30 insertions(+), 12 deletions(-) diff --git a/qa/rpc-tests/test_framework/util.py b/qa/rpc-tests/test_framework/util.py index 30dd5de58..d9d5129f2 100644 --- a/qa/rpc-tests/test_framework/util.py +++ b/qa/rpc-tests/test_framework/util.py @@ -67,6 +67,9 @@ def check_json_precision(): if satoshis != 2000000000000003: raise RuntimeError("JSON encode/decode loses precision") +def count_bytes(hex_string): + return len(bytearray.fromhex(hex_string)) + def sync_blocks(rpc_connections, wait=1): """ Wait until everybody has the same block count diff --git a/qa/rpc-tests/wallet.py b/qa/rpc-tests/wallet.py index f9ec6f429..6f6bc3189 100755 --- a/qa/rpc-tests/wallet.py +++ b/qa/rpc-tests/wallet.py @@ -24,6 +24,17 @@ from test_framework.util import * class WalletTest (BitcoinTestFramework): + def check_fee_amount(self, curr_balance, balance_with_fee, fee_per_byte, tx_size): + """Return curr_balance after asserting the fee was in range""" + fee = balance_with_fee - curr_balance + target_fee = fee_per_byte * tx_size + if fee < target_fee: + raise AssertionError("Fee of %s BTC too low! (Should be %s BTC)"%(str(fee), str(target_fee))) + # allow the node's estimation to be at most 2 bytes off + if fee > fee_per_byte * (tx_size + 2): + raise AssertionError("Fee of %s BTC too high! (Should be %s BTC)"%(str(fee), str(target_fee))) + return curr_balance + def setup_chain(self): print("Initializing test directory "+self.options.tmpdir) initialize_chain_clean(self.options.tmpdir, 4) @@ -104,33 +115,37 @@ class WalletTest (BitcoinTestFramework): # Send 10 BTC normal address = self.nodes[0].getnewaddress("test") - self.nodes[2].settxfee(Decimal('0.001')) + fee_per_byte = Decimal('0.001') / 1000 + self.nodes[2].settxfee(fee_per_byte * 1000) txid = self.nodes[2].sendtoaddress(address, 10, "", "", False) self.nodes[2].generate(1) self.sync_all() - assert_equal(self.nodes[2].getbalance(), Decimal('89.99900000')) - assert_equal(self.nodes[0].getbalance(), Decimal('10.00000000')) + node_2_bal = self.check_fee_amount(self.nodes[2].getbalance(), Decimal('90'), fee_per_byte, count_bytes(self.nodes[2].getrawtransaction(txid))) + assert_equal(self.nodes[0].getbalance(), Decimal('10')) # Send 10 BTC with subtract fee from amount txid = self.nodes[2].sendtoaddress(address, 10, "", "", True) self.nodes[2].generate(1) self.sync_all() - assert_equal(self.nodes[2].getbalance(), Decimal('79.99900000')) - assert_equal(self.nodes[0].getbalance(), Decimal('19.99900000')) + node_2_bal -= Decimal('10') + assert_equal(self.nodes[2].getbalance(), node_2_bal) + node_0_bal = self.check_fee_amount(self.nodes[0].getbalance(), Decimal('20'), fee_per_byte, count_bytes(self.nodes[2].getrawtransaction(txid))) # Sendmany 10 BTC txid = self.nodes[2].sendmany('from1', {address: 10}, 0, "", []) self.nodes[2].generate(1) self.sync_all() - assert_equal(self.nodes[2].getbalance(), Decimal('69.99800000')) - assert_equal(self.nodes[0].getbalance(), Decimal('29.99900000')) + node_0_bal += Decimal('10') + node_2_bal = self.check_fee_amount(self.nodes[2].getbalance(), node_2_bal - Decimal('10'), fee_per_byte, count_bytes(self.nodes[2].getrawtransaction(txid))) + assert_equal(self.nodes[0].getbalance(), node_0_bal) # Sendmany 10 BTC with subtract fee from amount txid = self.nodes[2].sendmany('from1', {address: 10}, 0, "", [address]) self.nodes[2].generate(1) self.sync_all() - assert_equal(self.nodes[2].getbalance(), Decimal('59.99800000')) - assert_equal(self.nodes[0].getbalance(), Decimal('39.99800000')) + node_2_bal -= Decimal('10') + assert_equal(self.nodes[2].getbalance(), node_2_bal) + node_0_bal = self.check_fee_amount(self.nodes[0].getbalance(), node_0_bal + Decimal('10'), fee_per_byte, count_bytes(self.nodes[2].getrawtransaction(txid))) # Test ResendWalletTransactions: # Create a couple of transactions, then start up a fourth @@ -191,14 +206,14 @@ class WalletTest (BitcoinTestFramework): txObjNotBroadcasted = self.nodes[0].gettransaction(txIdNotBroadcasted) self.nodes[1].generate(1) #mine a block, tx should not be in there self.sync_all() - assert_equal(self.nodes[2].getbalance(), Decimal('59.99800000')); #should not be changed because tx was not broadcasted + assert_equal(self.nodes[2].getbalance(), node_2_bal); #should not be changed because tx was not broadcasted #now broadcast from another node, mine a block, sync, and check the balance self.nodes[1].sendrawtransaction(txObjNotBroadcasted['hex']) self.nodes[1].generate(1) self.sync_all() txObjNotBroadcasted = self.nodes[0].gettransaction(txIdNotBroadcasted) - assert_equal(self.nodes[2].getbalance(), Decimal('61.99800000')); #should not be + assert_equal(self.nodes[2].getbalance(), node_2_bal + Decimal('2')); #should not be #create another tx txIdNotBroadcasted = self.nodes[0].sendtoaddress(self.nodes[2].getnewaddress(), 2); @@ -216,7 +231,7 @@ class WalletTest (BitcoinTestFramework): sync_blocks(self.nodes) #tx should be added to balance because after restarting the nodes tx should be broadcastet - assert_equal(self.nodes[2].getbalance(), Decimal('63.99800000')); #should not be + assert_equal(self.nodes[2].getbalance(), node_2_bal + Decimal('4')); #should not be #send a tx with value in a string (PR#6380 +) txId = self.nodes[0].sendtoaddress(self.nodes[2].getnewaddress(), "2")