From 5c1b9714cb0a13be28324f91f4ec9ca66a1de8c7 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Jo=C3=A3o=20Barbosa?= Date: Tue, 2 Jul 2019 15:16:36 +0100 Subject: wallet: Fix -maxtxfee check by moving it to CWallet::CreateTransaction --- src/qt/walletmodel.cpp | 7 +++++-- src/wallet/wallet.cpp | 10 +++++----- test/functional/rpc_psbt.py | 2 +- test/functional/wallet_bumpfee.py | 10 ++++++++++ 4 files changed, 21 insertions(+), 8 deletions(-) diff --git a/src/qt/walletmodel.cpp b/src/qt/walletmodel.cpp index c1eba61749..6f16834109 100644 --- a/src/qt/walletmodel.cpp +++ b/src/qt/walletmodel.cpp @@ -221,9 +221,12 @@ WalletModel::SendCoinsReturn WalletModel::prepareTransaction(WalletModelTransact return TransactionCreationFailed; } - // Reject absurdly high fee - if (nFeeRequired > m_wallet->getDefaultMaxTxFee()) + // Reject absurdly high fee. (This can never happen because the + // wallet never creates transactions with fee greater than + // m_default_max_tx_fee. This merely a belt-and-suspenders check). + if (nFeeRequired > m_wallet->getDefaultMaxTxFee()) { return AbsurdFee; + } } return SendCoinsReturn(OK); diff --git a/src/wallet/wallet.cpp b/src/wallet/wallet.cpp index 8807acb6b7..565e551fae 100644 --- a/src/wallet/wallet.cpp +++ b/src/wallet/wallet.cpp @@ -2694,11 +2694,6 @@ bool CWallet::FundTransaction(CMutableTransaction& tx, CAmount& nFeeRet, int& nC } } - if (nFeeRet > this->m_default_max_tx_fee) { - strFailReason = TransactionErrorString(TransactionError::MAX_FEE_EXCEEDED); - return false; - } - return true; } @@ -3135,6 +3130,11 @@ bool CWallet::CreateTransaction(interfaces::Chain::Lock& locked_chain, const std } } + if (nFeeRet > m_default_max_tx_fee) { + strFailReason = TransactionErrorString(TransactionError::MAX_FEE_EXCEEDED); + return false; + } + if (gArgs.GetBoolArg("-walletrejectlongchains", DEFAULT_WALLET_REJECT_LONG_CHAINS)) { // Lastly, ensure this tx will pass the mempool's chain limits if (!chain().checkChainLimits(tx)) { diff --git a/test/functional/rpc_psbt.py b/test/functional/rpc_psbt.py index 8bfa7a0238..f7fc10886a 100755 --- a/test/functional/rpc_psbt.py +++ b/test/functional/rpc_psbt.py @@ -136,7 +136,7 @@ class PSBTTest(BitcoinTestFramework): assert_greater_than(0.06, res["fee"]) # feeRate of 10 BTC / KB produces a total fee well above -maxtxfee - # previously this was silenty capped at -maxtxfee + # previously this was silently capped at -maxtxfee assert_raises_rpc_error(-4, "Fee exceeds maximum configured by -maxtxfee", self.nodes[1].walletcreatefundedpsbt, [{"txid":txid,"vout":p2wpkh_pos},{"txid":txid,"vout":p2sh_p2wpkh_pos},{"txid":txid,"vout":p2pkh_pos}], {self.nodes[1].getnewaddress():29.99}, 0, {"feeRate": 10}) # partially sign multisig things with node 1 diff --git a/test/functional/wallet_bumpfee.py b/test/functional/wallet_bumpfee.py index 1fe029a6fb..030eb50791 100755 --- a/test/functional/wallet_bumpfee.py +++ b/test/functional/wallet_bumpfee.py @@ -80,6 +80,7 @@ class BumpFeeTest(BitcoinTestFramework): test_bumpfee_metadata(rbf_node, dest_address) test_locked_wallet_fails(rbf_node, dest_address) test_change_script_match(rbf_node, dest_address) + test_maxtxfee_fails(self, rbf_node, dest_address) # These tests wipe out a number of utxos that are expected in other tests test_small_output_with_feerate_succeeds(rbf_node, dest_address) test_no_more_inputs_fails(rbf_node, dest_address) @@ -248,6 +249,15 @@ def test_settxfee(rbf_node, dest_address): rbf_node.settxfee(Decimal("0.00000000")) # unset paytxfee +def test_maxtxfee_fails(test, rbf_node, dest_address): + test.restart_node(1, ['-maxtxfee=0.00003'] + test.extra_args[1]) + rbf_node.walletpassphrase(WALLET_PASSPHRASE, WALLET_PASSPHRASE_TIMEOUT) + rbfid = spend_one_input(rbf_node, dest_address) + assert_raises_rpc_error(-4, "Unable to create transaction: Fee exceeds maximum configured by -maxtxfee", rbf_node.bumpfee, rbfid) + test.restart_node(1, test.extra_args[1]) + rbf_node.walletpassphrase(WALLET_PASSPHRASE, WALLET_PASSPHRASE_TIMEOUT) + + def test_rebumping(rbf_node, dest_address): # check that re-bumping the original tx fails, but bumping the bumper succeeds rbfid = spend_one_input(rbf_node, dest_address) -- cgit v1.2.3 From 177550101b600ccb32886695326eb72cd9752c8b Mon Sep 17 00:00:00 2001 From: MarcoFalke Date: Tue, 2 Jul 2019 11:50:13 -0400 Subject: wallet: Remove unreachable code in CreateTransaction --- src/wallet/wallet.cpp | 8 -------- 1 file changed, 8 deletions(-) diff --git a/src/wallet/wallet.cpp b/src/wallet/wallet.cpp index 565e551fae..108b182f17 100644 --- a/src/wallet/wallet.cpp +++ b/src/wallet/wallet.cpp @@ -3006,14 +3006,6 @@ bool CWallet::CreateTransaction(interfaces::Chain::Lock& locked_chain, const std return false; } - // If we made it here and we aren't even able to meet the relay fee on the next pass, give up - // because we must be at the maximum allowed fee. - if (nFeeNeeded < chain().relayMinFee().GetFee(nBytes)) - { - strFailReason = _("Transaction too large for fee policy"); - return false; - } - if (nFeeRet >= nFeeNeeded) { // Reduce fee to only the needed amount if possible. This // prevents potential overpayment in fees if the coins -- cgit v1.2.3 From 0d101a340c44841cbbc5982d55354b1787bc39e2 Mon Sep 17 00:00:00 2001 From: MarcoFalke Date: Tue, 2 Jul 2019 11:50:44 -0400 Subject: test: Add test for maxtxfee option --- test/functional/wallet_create_tx.py | 39 +++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) diff --git a/test/functional/wallet_create_tx.py b/test/functional/wallet_create_tx.py index 0b584a0bb2..330de8b0fc 100755 --- a/test/functional/wallet_create_tx.py +++ b/test/functional/wallet_create_tx.py @@ -6,6 +6,7 @@ from test_framework.test_framework import BitcoinTestFramework from test_framework.util import ( assert_equal, + assert_raises_rpc_error, ) from test_framework.blocktools import ( TIME_GENESIS_BLOCK, @@ -26,6 +27,10 @@ class CreateTxWalletTest(BitcoinTestFramework): self.nodes[0].generate(200) self.nodes[0].setmocktime(0) + self.test_anti_fee_sniping() + self.test_tx_size_too_large() + + def test_anti_fee_sniping(self): self.log.info('Check that we have some (old) blocks and that anti-fee-sniping is disabled') assert_equal(self.nodes[0].getblockchaininfo()['blocks'], 200) txid = self.nodes[0].sendtoaddress(self.nodes[0].getnewaddress(), 1) @@ -38,6 +43,40 @@ class CreateTxWalletTest(BitcoinTestFramework): tx = self.nodes[0].decoderawtransaction(self.nodes[0].gettransaction(txid)['hex']) assert 0 < tx['locktime'] <= 201 + def test_tx_size_too_large(self): + # More than 10kB of outputs, so that we hit -maxtxfee with a high feerate + outputs = {self.nodes[0].getnewaddress(address_type='bech32'): 0.000025 for i in range(400)} + raw_tx = self.nodes[0].createrawtransaction(inputs=[], outputs=outputs) + + for fee_setting in ['-minrelaytxfee=0.01', '-mintxfee=0.01', '-paytxfee=0.01']: + self.log.info('Check maxtxfee in combination with {}'.format(fee_setting)) + self.restart_node(0, extra_args=[fee_setting]) + assert_raises_rpc_error( + -6, + "Fee exceeds maximum configured by -maxtxfee", + lambda: self.nodes[0].sendmany(dummy="", amounts=outputs), + ) + assert_raises_rpc_error( + -4, + "Fee exceeds maximum configured by -maxtxfee", + lambda: self.nodes[0].fundrawtransaction(hexstring=raw_tx), + ) + + self.log.info('Check maxtxfee in combination with settxfee') + self.restart_node(0) + self.nodes[0].settxfee(0.01) + assert_raises_rpc_error( + -6, + "Fee exceeds maximum configured by -maxtxfee", + lambda: self.nodes[0].sendmany(dummy="", amounts=outputs), + ) + assert_raises_rpc_error( + -4, + "Fee exceeds maximum configured by -maxtxfee", + lambda: self.nodes[0].fundrawtransaction(hexstring=raw_tx), + ) + self.nodes[0].settxfee(0) + if __name__ == '__main__': CreateTxWalletTest().main() -- cgit v1.2.3