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| author | Pieter Wuille <pieter.wuille@gmail.com> | 2012-07-01 18:54:00 +0200 |
|---|---|---|
| committer | Pieter Wuille <pieter.wuille@gmail.com> | 2012-10-20 23:08:57 +0200 |
| commit | 450cbb0944cd20a06ce806e6679a1f4c83c50db2 (patch) | |
| tree | 5c6fd4998dfcc81b5383ad490c1ffe53d372dec7 /src/script.h | |
| parent | bba89aa82a80f0373dcb7288d96d5b0fcb453d73 (diff) | |
Ultraprune
This switches bitcoin's transaction/block verification logic to use a
"coin database", which contains all unredeemed transaction output scripts,
amounts and heights.
The name ultraprune comes from the fact that instead of a full transaction
index, we only (need to) keep an index with unspent outputs. For now, the
blocks themselves are kept as usual, although they are only necessary for
serving, rescanning and reorganizing.
The basic datastructures are CCoins (representing the coins of a single
transaction), and CCoinsView (representing a state of the coins database).
There are several implementations for CCoinsView. A dummy, one backed by
the coins database (coins.dat), one backed by the memory pool, and one
that adds a cache on top of it. FetchInputs, ConnectInputs, ConnectBlock,
DisconnectBlock, ... now operate on a generic CCoinsView.
The block switching logic now builds a single cached CCoinsView with
changes to be committed to the database before any changes are made.
This means no uncommitted changes are ever read from the database, and
should ease the transition to another database layer which does not
support transactions (but does support atomic writes), like LevelDB.
For the getrawtransaction() RPC call, access to a txid-to-disk index
would be preferable. As this index is not necessary or even useful
for any other part of the implementation, it is not provided. Instead,
getrawtransaction() uses the coin database to find the block height,
and then scans that block to find the requested transaction. This is
slow, but should suffice for debug purposes.
Diffstat (limited to 'src/script.h')
| -rw-r--r-- | src/script.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/script.h b/src/script.h index e7b52d95e1..f9df587ca3 100644 --- a/src/script.h +++ b/src/script.h @@ -14,6 +14,7 @@ #include "keystore.h" #include "bignum.h" +class CCoins; class CTransaction; /** Signature hash types/flags */ @@ -667,7 +668,7 @@ bool SignSignature(const CKeyStore& keystore, const CScript& fromPubKey, CTransa bool SignSignature(const CKeyStore& keystore, const CTransaction& txFrom, CTransaction& txTo, unsigned int nIn, int nHashType=SIGHASH_ALL); bool VerifyScript(const CScript& scriptSig, const CScript& scriptPubKey, const CTransaction& txTo, unsigned int nIn, bool fValidatePayToScriptHash, bool fStrictEncodings, int nHashType); -bool VerifySignature(const CTransaction& txFrom, const CTransaction& txTo, unsigned int nIn, bool fValidatePayToScriptHash, bool fStrictEncodings, int nHashType); +bool VerifySignature(const CCoins& txFrom, const CTransaction& txTo, unsigned int nIn, bool fValidatePayToScriptHash, bool fStrictEncodings, int nHashType); // Given two sets of signatures for scriptPubKey, possibly with OP_0 placeholders, // combine them intelligently and return the result. |