Helper for producing a bunch of max-sized low-S low-R signatures (eg 71 bytes)
| 54 | |
| 55 | // Helper for producing a bunch of max-sized low-S low-R signatures (eg 71 bytes) |
| 56 | bool CWallet::DummySignTx(CMutableTransaction &txNew, const std::vector<CTxOut> &txouts, const CCoinControl* coin_control) const |
| 57 | { |
| 58 | // Fill in dummy signatures for fee calculation. |
| 59 | int nIn = 0; |
| 60 | for (const auto& txout : txouts) |
| 61 | { |
| 62 | CTxIn& txin = txNew.vin[nIn]; |
| 63 | // If weight was provided, fill the input to that weight |
| 64 | if (coin_control && coin_control->HasInputWeight(txin.prevout)) { |
| 65 | if (!FillInputToWeight(txNew, nIn, coin_control->GetInputWeight(txin.prevout))) { |
| 66 | return false; |
| 67 | } |
| 68 | nIn++; |
| 69 | continue; |
| 70 | } |
| 71 | // Use max sig if watch only inputs were used or if this particular input is an external input |
| 72 | // to ensure a sufficient fee is attained for the requested feerate. |
| 73 | const bool use_max_sig = coin_control && (coin_control->fAllowWatchOnly || coin_control->IsExternalSelected(txin.prevout)); |
| 74 | const std::unique_ptr<SigningProvider> provider = GetSolvingProvider(txout.scriptPubKey); |
| 75 | if (!provider || !DummySignInput(*provider, txNew, nIn, txout, use_max_sig)) { |
| 76 | if (!coin_control || !DummySignInput(coin_control->m_external_provider, txNew, nIn, txout, use_max_sig)) { |
| 77 | return false; |
| 78 | } |
| 79 | } |
| 80 | |
| 81 | nIn++; |
| 82 | } |
| 83 | return true; |
| 84 | } |
| 85 | |
| 86 | bool FillInputToWeight(CMutableTransaction& mtx, size_t nIn, int64_t target_weight) |
| 87 | { |
no test coverage detected