Function CalculateMaximumSignedTxSize

src/wallet/spend.cpp:168–183

txouts needs to be in the order of tx.vin

// txouts needs to be in the order of tx.vin
TxSize CalculateMaximumSignedTxSize(const CTransaction &tx, const CWallet *wallet, const std::vector<CTxOut>& txouts, const CCoinControl* coin_control)
{
    CMutableTransaction txNew(tx);
    if (!wallet->DummySignTx(txNew, txouts, coin_control)) {
        return TxSize{-1, -1};
    }
    CTransaction ctx(txNew);
    int64_t vsize = GetVirtualTransactionSize(ctx);
    int64_t weight = GetTransactionWeight(ctx);
    // ELEMENTS: use discounted vsize for CTs if enabled
    if (Params().GetCreateDiscountCT()) {
        vsize = GetDiscountVirtualTransactionSize(ctx);
    }

    return TxSize{vsize, weight};
}

void AvailableCoins(const CWallet& wallet, std::vector<COutput> &vCoins, const CCoinControl *coinControl, const CAmount &nMinimumAmount, const CAmount &nMaximumAmount, const CAmount &nMinimumSumAmount, const uint64_t nMaximumCount, const CAsset* asset_filter) EXCLUSIVE_LOCKS_REQUIRED(wallet.cs_wallet)
{