diff options
| -rw-r--r-- | src/main.cpp | 62 |
1 files changed, 38 insertions, 24 deletions
diff --git a/src/main.cpp b/src/main.cpp index 43e5a2d024..fb2b2482e6 100644 --- a/src/main.cpp +++ b/src/main.cpp @@ -1588,6 +1588,39 @@ bool UndoReadFromDisk(CBlockUndo& blockundo, const CDiskBlockPos& pos, const uin } // anon namespace +/** + * Apply the undo operation of a CTxInUndo to the given chain state. + * @param undo The undo object. + * @param view The coins view to which to apply the changes. + * @param out The out point that corresponds to the tx input. + * @return True on success. + */ +static bool ApplyTxInUndo(const CTxInUndo& undo, CCoinsViewCache& view, const COutPoint& out) +{ + bool fClean = true; + + CCoinsModifier coins = view.ModifyCoins(out.hash); + if (undo.nHeight != 0) { + // undo data contains height: this is the last output of the prevout tx being spent + if (!coins->IsPruned()) + fClean = fClean && error("%s: undo data overwriting existing transaction", __func__); + coins->Clear(); + coins->fCoinBase = undo.fCoinBase; + coins->nHeight = undo.nHeight; + coins->nVersion = undo.nVersion; + } else { + if (coins->IsPruned()) + fClean = fClean && error("%s: undo data adding output to missing transaction", __func__); + } + if (coins->IsAvailable(out.n)) + fClean = fClean && error("%s: undo data overwriting existing output", __func__); + if (coins->vout.size() < out.n+1) + coins->vout.resize(out.n+1); + coins->vout[out.n] = undo.txout; + + return fClean; +} + bool DisconnectBlock(CBlock& block, CValidationState& state, CBlockIndex* pindex, CCoinsViewCache& view, bool* pfClean) { assert(pindex->GetBlockHash() == view.GetBestBlock()); @@ -1613,11 +1646,8 @@ bool DisconnectBlock(CBlock& block, CValidationState& state, CBlockIndex* pindex uint256 hash = tx.GetHash(); // Check that all outputs are available and match the outputs in the block itself - // exactly. Note that transactions with only provably unspendable outputs won't - // have outputs available even in the block itself, so we handle that case - // specially with outsEmpty. + // exactly. { - CCoins outsEmpty; CCoinsModifier outs = view.ModifyCoins(hash); outs->ClearUnspendable(); @@ -1642,24 +1672,8 @@ bool DisconnectBlock(CBlock& block, CValidationState& state, CBlockIndex* pindex for (unsigned int j = tx.vin.size(); j-- > 0;) { const COutPoint &out = tx.vin[j].prevout; const CTxInUndo &undo = txundo.vprevout[j]; - CCoinsModifier coins = view.ModifyCoins(out.hash); - if (undo.nHeight != 0) { - // undo data contains height: this is the last output of the prevout tx being spent - if (!coins->IsPruned()) - fClean = fClean && error("DisconnectBlock(): undo data overwriting existing transaction"); - coins->Clear(); - coins->fCoinBase = undo.fCoinBase; - coins->nHeight = undo.nHeight; - coins->nVersion = undo.nVersion; - } else { - if (coins->IsPruned()) - fClean = fClean && error("DisconnectBlock(): undo data adding output to missing transaction"); - } - if (coins->IsAvailable(out.n)) - fClean = fClean && error("DisconnectBlock(): undo data overwriting existing output"); - if (coins->vout.size() < out.n+1) - coins->vout.resize(out.n+1); - coins->vout[out.n] = undo.txout; + if (!ApplyTxInUndo(undo, view, out)) + fClean = false; } } } @@ -1670,9 +1684,9 @@ bool DisconnectBlock(CBlock& block, CValidationState& state, CBlockIndex* pindex if (pfClean) { *pfClean = fClean; return true; - } else { - return fClean; } + + return fClean; } void static FlushBlockFile(bool fFinalize = false) |