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author | furszy <matiasfurszyfer@protonmail.com> | 2022-04-08 16:43:10 -0300 |
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committer | furszy <matiasfurszyfer@protonmail.com> | 2022-07-08 11:18:35 -0300 |
commit | 22351725bc4c5eb63ee45f607374bbf2d76e2b8c (patch) | |
tree | f070e528309494f0f519be8fd590117c00f1761b /src/wallet/spend.cpp | |
parent | 198fcca162f4d2f877feab485e629ff89818ff56 (diff) | |
download | bitcoin-22351725bc4c5eb63ee45f607374bbf2d76e2b8c.tar.xz |
send: refactor CreateTransaction flow to return a BResult<CTransactionRef>
Diffstat (limited to 'src/wallet/spend.cpp')
-rw-r--r-- | src/wallet/spend.cpp | 97 |
1 files changed, 43 insertions, 54 deletions
diff --git a/src/wallet/spend.cpp b/src/wallet/spend.cpp index 9846335da7..4a54a5f671 100644 --- a/src/wallet/spend.cpp +++ b/src/wallet/spend.cpp @@ -656,18 +656,16 @@ static void DiscourageFeeSniping(CMutableTransaction& tx, FastRandomContext& rng } } -static std::optional<CreatedTransactionResult> CreateTransactionInternal( +static BResult<CreatedTransactionResult> CreateTransactionInternal( CWallet& wallet, const std::vector<CRecipient>& vecSend, int change_pos, - bilingual_str& error, const CCoinControl& coin_control, bool sign) EXCLUSIVE_LOCKS_REQUIRED(wallet.cs_wallet) { AssertLockHeld(wallet.cs_wallet); // out variables, to be packed into returned result structure - CTransactionRef tx; CAmount nFeeRet; int nChangePosInOut = change_pos; @@ -696,6 +694,7 @@ static std::optional<CreatedTransactionResult> CreateTransactionInternal( // Create change script that will be used if we need change CScript scriptChange; + bilingual_str error; // possible error str // coin control: send change to custom address if (!std::get_if<CNoDestination>(&coin_control.destChange)) { @@ -743,13 +742,11 @@ static std::optional<CreatedTransactionResult> CreateTransactionInternal( // Do not, ever, assume that it's fine to change the fee rate if the user has explicitly // provided one if (coin_control.m_feerate && coin_selection_params.m_effective_feerate > *coin_control.m_feerate) { - error = strprintf(_("Fee rate (%s) is lower than the minimum fee rate setting (%s)"), coin_control.m_feerate->ToString(FeeEstimateMode::SAT_VB), coin_selection_params.m_effective_feerate.ToString(FeeEstimateMode::SAT_VB)); - return std::nullopt; + return strprintf(_("Fee rate (%s) is lower than the minimum fee rate setting (%s)"), coin_control.m_feerate->ToString(FeeEstimateMode::SAT_VB), coin_selection_params.m_effective_feerate.ToString(FeeEstimateMode::SAT_VB)); } if (feeCalc.reason == FeeReason::FALLBACK && !wallet.m_allow_fallback_fee) { // eventually allow a fallback fee - error = _("Fee estimation failed. Fallbackfee is disabled. Wait a few blocks or enable -fallbackfee."); - return std::nullopt; + return _("Fee estimation failed. Fallbackfee is disabled. Wait a few blocks or enable -fallbackfee."); } // Calculate the cost of change @@ -774,10 +771,8 @@ static std::optional<CreatedTransactionResult> CreateTransactionInternal( coin_selection_params.tx_noinputs_size += ::GetSerializeSize(txout, PROTOCOL_VERSION); } - if (IsDust(txout, wallet.chain().relayDustFee())) - { - error = _("Transaction amount too small"); - return std::nullopt; + if (IsDust(txout, wallet.chain().relayDustFee())) { + return _("Transaction amount too small"); } txNew.vout.push_back(txout); } @@ -798,8 +793,7 @@ static std::optional<CreatedTransactionResult> CreateTransactionInternal( // Choose coins to use std::optional<SelectionResult> result = SelectCoins(wallet, res_available_coins.coins, /*nTargetValue=*/selection_target, coin_control, coin_selection_params); if (!result) { - error = _("Insufficient funds"); - return std::nullopt; + return _("Insufficient funds"); } TRACE5(coin_selection, selected_coins, wallet.GetName().c_str(), GetAlgorithmName(result->m_algo).c_str(), result->m_target, result->GetWaste(), result->GetSelectedValue()); @@ -813,10 +807,8 @@ static std::optional<CreatedTransactionResult> CreateTransactionInternal( // Insert change txn at random position: nChangePosInOut = rng_fast.randrange(txNew.vout.size() + 1); } - else if ((unsigned int)nChangePosInOut > txNew.vout.size()) - { - error = _("Transaction change output index out of range"); - return std::nullopt; + else if ((unsigned int)nChangePosInOut > txNew.vout.size()) { + return _("Transaction change output index out of range"); } assert(nChangePosInOut != -1); @@ -843,8 +835,7 @@ static std::optional<CreatedTransactionResult> CreateTransactionInternal( TxSize tx_sizes = CalculateMaximumSignedTxSize(CTransaction(txNew), &wallet, &coin_control); int nBytes = tx_sizes.vsize; if (nBytes == -1) { - error = _("Missing solving data for estimating transaction size"); - return std::nullopt; + return _("Missing solving data for estimating transaction size"); } nFeeRet = coin_selection_params.m_effective_feerate.GetFee(nBytes); @@ -904,11 +895,10 @@ static std::optional<CreatedTransactionResult> CreateTransactionInternal( // Error if this output is reduced to be below dust if (IsDust(txout, wallet.chain().relayDustFee())) { if (txout.nValue < 0) { - error = _("The transaction amount is too small to pay the fee"); + return _("The transaction amount is too small to pay the fee"); } else { - error = _("The transaction amount is too small to send after the fee has been deducted"); + return _("The transaction amount is too small to send after the fee has been deducted"); } - return std::nullopt; } } ++i; @@ -918,35 +908,31 @@ static std::optional<CreatedTransactionResult> CreateTransactionInternal( // Give up if change keypool ran out and change is required if (scriptChange.empty() && nChangePosInOut != -1) { - return std::nullopt; + return error; } if (sign && !wallet.SignTransaction(txNew)) { - error = _("Signing transaction failed"); - return std::nullopt; + return _("Signing transaction failed"); } // Return the constructed transaction data. - tx = MakeTransactionRef(std::move(txNew)); + CTransactionRef tx = MakeTransactionRef(std::move(txNew)); // Limit size if ((sign && GetTransactionWeight(*tx) > MAX_STANDARD_TX_WEIGHT) || (!sign && tx_sizes.weight > MAX_STANDARD_TX_WEIGHT)) { - error = _("Transaction too large"); - return std::nullopt; + return _("Transaction too large"); } if (nFeeRet > wallet.m_default_max_tx_fee) { - error = TransactionErrorString(TransactionError::MAX_FEE_EXCEEDED); - return std::nullopt; + return TransactionErrorString(TransactionError::MAX_FEE_EXCEEDED); } if (gArgs.GetBoolArg("-walletrejectlongchains", DEFAULT_WALLET_REJECT_LONG_CHAINS)) { // Lastly, ensure this tx will pass the mempool's chain limits if (!wallet.chain().checkChainLimits(tx)) { - error = _("Transaction has too long of a mempool chain"); - return std::nullopt; + return _("Transaction has too long of a mempool chain"); } } @@ -965,48 +951,47 @@ static std::optional<CreatedTransactionResult> CreateTransactionInternal( return CreatedTransactionResult(tx, nFeeRet, nChangePosInOut, feeCalc); } -std::optional<CreatedTransactionResult> CreateTransaction( +BResult<CreatedTransactionResult> CreateTransaction( CWallet& wallet, const std::vector<CRecipient>& vecSend, int change_pos, - bilingual_str& error, const CCoinControl& coin_control, bool sign) { if (vecSend.empty()) { - error = _("Transaction must have at least one recipient"); - return std::nullopt; + return _("Transaction must have at least one recipient"); } if (std::any_of(vecSend.cbegin(), vecSend.cend(), [](const auto& recipient){ return recipient.nAmount < 0; })) { - error = _("Transaction amounts must not be negative"); - return std::nullopt; + return _("Transaction amounts must not be negative"); } LOCK(wallet.cs_wallet); - std::optional<CreatedTransactionResult> txr_ungrouped = CreateTransactionInternal(wallet, vecSend, change_pos, error, coin_control, sign); - TRACE4(coin_selection, normal_create_tx_internal, wallet.GetName().c_str(), txr_ungrouped.has_value(), - txr_ungrouped.has_value() ? txr_ungrouped->fee : 0, txr_ungrouped.has_value() ? txr_ungrouped->change_pos : 0); - if (!txr_ungrouped) return std::nullopt; + auto res = CreateTransactionInternal(wallet, vecSend, change_pos, coin_control, sign); + TRACE4(coin_selection, normal_create_tx_internal, wallet.GetName().c_str(), res.HasRes(), + res ? res.GetObj().fee : 0, res ? res.GetObj().change_pos : 0); + if (!res) return res; + const auto& txr_ungrouped = res.GetObj(); // try with avoidpartialspends unless it's enabled already - if (txr_ungrouped->fee > 0 /* 0 means non-functional fee rate estimation */ && wallet.m_max_aps_fee > -1 && !coin_control.m_avoid_partial_spends) { + if (txr_ungrouped.fee > 0 /* 0 means non-functional fee rate estimation */ && wallet.m_max_aps_fee > -1 && !coin_control.m_avoid_partial_spends) { TRACE1(coin_selection, attempting_aps_create_tx, wallet.GetName().c_str()); CCoinControl tmp_cc = coin_control; tmp_cc.m_avoid_partial_spends = true; - bilingual_str error2; // fired and forgotten; if an error occurs, we discard the results - std::optional<CreatedTransactionResult> txr_grouped = CreateTransactionInternal(wallet, vecSend, change_pos, error2, tmp_cc, sign); + auto res_tx_grouped = CreateTransactionInternal(wallet, vecSend, change_pos, tmp_cc, sign); + // Helper optional class for now + std::optional<CreatedTransactionResult> txr_grouped{res_tx_grouped.HasRes() ? std::make_optional(res_tx_grouped.GetObj()) : std::nullopt}; // if fee of this alternative one is within the range of the max fee, we use this one - const bool use_aps{txr_grouped.has_value() ? (txr_grouped->fee <= txr_ungrouped->fee + wallet.m_max_aps_fee) : false}; + const bool use_aps{txr_grouped.has_value() ? (txr_grouped->fee <= txr_ungrouped.fee + wallet.m_max_aps_fee) : false}; TRACE5(coin_selection, aps_create_tx_internal, wallet.GetName().c_str(), use_aps, txr_grouped.has_value(), txr_grouped.has_value() ? txr_grouped->fee : 0, txr_grouped.has_value() ? txr_grouped->change_pos : 0); if (txr_grouped) { wallet.WalletLogPrintf("Fee non-grouped = %lld, grouped = %lld, using %s\n", - txr_ungrouped->fee, txr_grouped->fee, use_aps ? "grouped" : "non-grouped"); - if (use_aps) return txr_grouped; + txr_ungrouped.fee, txr_grouped->fee, use_aps ? "grouped" : "non-grouped"); + if (use_aps) return res_tx_grouped; } } - return txr_ungrouped; + return res; } bool FundTransaction(CWallet& wallet, CMutableTransaction& tx, CAmount& nFeeRet, int& nChangePosInOut, bilingual_str& error, bool lockUnspents, const std::set<int>& setSubtractFeeFromOutputs, CCoinControl coinControl) @@ -1042,11 +1027,15 @@ bool FundTransaction(CWallet& wallet, CMutableTransaction& tx, CAmount& nFeeRet, } } - std::optional<CreatedTransactionResult> txr = CreateTransaction(wallet, vecSend, nChangePosInOut, error, coinControl, false); - if (!txr) return false; - CTransactionRef tx_new = txr->tx; - nFeeRet = txr->fee; - nChangePosInOut = txr->change_pos; + auto res = CreateTransaction(wallet, vecSend, nChangePosInOut, coinControl, false); + if (!res) { + error = res.GetError(); + return false; + } + const auto& txr = res.GetObj(); + CTransactionRef tx_new = txr.tx; + nFeeRet = txr.fee; + nChangePosInOut = txr.change_pos; if (nChangePosInOut != -1) { tx.vout.insert(tx.vout.begin() + nChangePosInOut, tx_new->vout[nChangePosInOut]); |