* Replace blue score with DAA score in UTXO entries
* Use DAA score for coinbase maturity
* Use DAA score for sequence lock
* Fix calcBlockSubsidy to use DAA score
* Don't pay to blocks that are not included in the DAA added blocks, and bestow red blocks reward to the merging block
* Fix TestGetPruningPointUTXOs
* Fix TestTransactionAcceptance
* Fix TestChainedTransactions
* Fix TestVirtualDiff
* Fix TestBlockWindow
* Fix TestPruning
* Use NewFromSlice instead of manually creating the hash set
* Add assert
* Add comment
* Remove redundant call to UpdateDAADataAndReturnDifficultyBits
* Add RequiredDifficulty, rename UpdateDAADataAndReturnDifficultyBits to StageDAADataAndReturnRequiredDifficulty and add comments
* Make buildUTXOInvalidHeader get bits as an argument
* Fix comments
* Replaced the content of MsgIBDRootUTXOSetChunk with pairs of outpoint-utxo entry pairs.
* Rename utxoIter to utxoIterator.
* Add a big stinky TODO on an assert.
* Replace pruningStore staging with a UTXO set iterator.
* Reimplement receiveAndInsertIBDRootUTXOSet.
* Extract OutpointAndUTXOEntryPairsToDomainOutpointAndUTXOEntryPairs into domainconverters.go.
* Pass the outpoint and utxy entry pairs to the pruning store.
* Implement InsertCandidatePruningPointUTXOs.
* Implement ClearCandidatePruningPointUTXOs.
* Implement UpdateCandidatePruningPointMultiset.
* Use the candidate pruning point multiset in updatePruningPoint.
* Implement CandidatePruningPointUTXOIterator.
* Use the pruning point utxo set iterator for StageVirtualUTXOSet.
* Defer ClearCandidatePruningPointUTXOs.
* Implement OverwriteVirtualUTXOSet.
* Implement CommitCandidatePruningPointUTXOSet.
* Implement BeginOverwritingVirtualUTXOSet and FinishOverwritingVirtualUTXOSet.
* Implement overwriteVirtualUTXOSetAndCommitPruningPointUTXOSet.
* Rename ClearCandidatePruningPointUTXOs to ClearCandidatePruningPointData.
* Add missing methods to dbManager.
* Implement PruningPointUTXOs.
* Implement RecoverUTXOIfRequired.
* Delete the utxoserialization package.
* Fix compilation errors in TestValidateAndInsertPruningPoint.
* Switch order of operations in the if statements in PruningPointUTXOs so that Next() wouldn't be unnecessarily called.
* Fix missing pruning point utxo set staging and bad slice length.
* Fix no default multiset in InsertCandidatePruningPointUTXOs.
* Make go vet happy.
* Rename candidateXXX to importedXXX.
* Do some more renaming.
* Rename some more.
* Fix bad MsgIBDRootNotFound logic.
* Fix an error message.
* Simplify receiveIBDRootBlock.
* Fix error message in receiveAndInsertIBDRootUTXOSet.
* Do some more renaming.
* Fix merge errors.
* Fix a bug caused by calling iterator.First() unnecessarily.
* Remove databaseContext from stores and don't use a transaction in ClearXXX functions.
* Simplify receiveAndInsertIBDRootUTXOSet.
* Fix offset count in PruningPointUTXOs().
* Fix readOnlyUTXOIteratorWithDiff.First().
* Split handleRequestIBDRootUTXOSetAndBlockFlow into smaller methods.
* Rename IbdRootNotFound to UnexpectedPruningPoint.
* Rename requestIBDRootHash to requestPruningPointHash.
* Rename IBDRootHash to PruningPointHash.
* Rename RequestIBDRootUTXOSetAndBlock to RequestPruningPointUTXOSetAndBlock.
* Rename IBDRootUTXOSetChunk to PruningPointUTXOSetChunk.
* Rename RequestNextIBDRootUTXOSetChunk to RequestNextPruningPointUTXOSetChunk.
* Rename DoneIBDRootUTXOSetChunks to DonePruningPointUTXOSetChunks.
* Rename remaining references to IBD root.
* Fix an error message.
* Add a check for HadStartedImportingPruningPointUTXOSet in commitVirtualUTXODiff.
* Add a check for HadStartedImportingPruningPointUTXOSet in ImportPruningPointUTXOSetIntoVirtualUTXOSet.
* Move FinishImportingPruningPointUTXOSet closer to HadStartedImportingPruningPointUTXOSet.
* Remove reference to pruningStore in utxoSetIterator.
* Pointerify utxoSetIterator receivers.
* Fix bad insert in CommitImportedPruningPointUTXOSet.
* Rename commitImportedPruningPointUTXOSetAll to applyImportedPruningPointUTXOSet.
* Simplify PruningPointUTXOs.
* Add populateTransactionWithUTXOEntriesFromUTXOSet.
* Fix a TODO comment.
* Rename InsertImportedPruningPointUTXOs to AppendImportedPruningPointUTXOs.
* Extract handleRequestPruningPointUTXOSetAndBlockMessage to a separate method.
* Rename stuff in readOnlyUTXOIteratorWithDiff.First().
* Address toAddIterator in readOnlyUTXOIteratorWithDiff.First().
* Call First() before any full iteration on ReadOnlyUTXOSetIterator.
* Call First() before any full iteration on a database Cursor.
* Put StartImportingPruningPointUTXOSet inside the pruning point transaction.
* Make serializeOutpoint and serializeUTXOEntry free functions in pruningStore.
* Fix readOnlyUTXOIteratorWithDiff.First().
* Fix bad validations in importPruningPoint.
* Remove superfluous call to validateBlockTransactionsAgainstPastUTXO.
