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Switch CCoinsView and chainstate db from per-txid to per-txout

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This patch makes several related changes:
* Changes the CCoinsView virtual methods (GetCoins, HaveCoins, ...)
  to be COutPoint/Coin-based rather than txid/CCoins-based.
* Changes the chainstate db to a new incompatible format that is also
  COutPoint/Coin based.
* Implements reconstruction code for hash_serialized_2.
* Adapts the coins_tests unit tests (thanks to Russell Yanofsky).

A side effect of the new CCoinsView model is that we can no longer
use the (unreliable) test for transaction outputs in the UTXO set
to determine whether we already have a particular transaction.
This commit is contained in:
Pieter Wuille 2017-04-25 11:29:39 -07:00
parent 4ec0d9e794
commit 5083079688
15 changed files with 363 additions and 373 deletions
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5
src/net_processing.cpp
View file

@ -911,12 +911,11 @@ bool static AlreadyHave(const CInv& inv) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
recentRejects->reset();
}
// Use pcoinsTip->HaveCoinsInCache as a quick approximation to exclude
// requesting or processing some txs which have already been included in a block
return recentRejects->contains(inv.hash) ||
mempool.exists(inv.hash) ||
mapOrphanTransactions.count(inv.hash) ||
pcoinsTip->HaveCoinsInCache(inv.hash);
pcoinsTip->HaveCoinsInCache(COutPoint(inv.hash, 0)) || // Best effort: only try output 0 and 1
pcoinsTip->HaveCoinsInCache(COutPoint(inv.hash, 1));
}
case MSG_BLOCK:
case MSG_WITNESS_BLOCK: