diff options
Diffstat (limited to 'src/coins.h')
| -rw-r--r-- | src/coins.h | 29 |
1 files changed, 22 insertions, 7 deletions
diff --git a/src/coins.h b/src/coins.h index bf4a777b8a..d174422100 100644 --- a/src/coins.h +++ b/src/coins.h @@ -29,11 +29,11 @@ * - VARINT(nHeight) * * The nCode value consists of: - * - bit 1: IsCoinBase() - * - bit 2: vout[0] is not spent - * - bit 4: vout[1] is not spent + * - bit 0: IsCoinBase() + * - bit 1: vout[0] is not spent + * - bit 2: vout[1] is not spent * - The higher bits encode N, the number of non-zero bytes in the following bitvector. - * - In case both bit 2 and bit 4 are unset, they encode N-1, as there must be at + * - In case both bit 1 and bit 2 are unset, they encode N-1, as there must be at * least one non-spent output). * * Example: 0104835800816115944e077fe7c803cfa57f29b36bf87c1d358bb85e @@ -58,7 +58,7 @@ * * - version = 1 * - code = 9 (coinbase, neither vout[0] or vout[1] are unspent, - * 2 (1, +1 because both bit 2 and bit 4 are unset) non-zero bitvector bytes follow) + * 2 (1, +1 because both bit 1 and bit 2 are unset) non-zero bitvector bytes follow) * - unspentness bitvector: bits 2 (0x04) and 14 (0x4000) are set, so vout[2+2] and vout[14+2] are unspent * - vout[4]: 86ef97d5790061b01caab50f1b8e9c50a5057eb43c2d9563a4ee * * 86ef97d579: compact amount representation for 234925952 (2.35 BTC) @@ -420,6 +420,17 @@ public: CCoinsModifier ModifyCoins(const uint256 &txid); /** + * Return a modifiable reference to a CCoins. Assumes that no entry with the given + * txid exists and creates a new one. This saves a database access in the case where + * the coins were to be wiped out by FromTx anyway. This should not be called with + * the 2 historical coinbase duplicate pairs because the new coins are marked fresh, and + * in the event the duplicate coinbase was spent before a flush, the now pruned coins + * would not properly overwrite the first coinbase of the pair. Simultaneous modifications + * are not allowed. + */ + CCoinsModifier ModifyNewCoins(const uint256 &txid); + + /** * Push the modifications applied to this cache to its base. * Failure to call this method before destruction will cause the changes to be forgotten. * If false is returned, the state of this cache (and its backing view) will be undefined. @@ -445,8 +456,12 @@ public: //! Check whether all prevouts of the transaction are present in the UTXO set represented by this view bool HaveInputs(const CTransaction& tx) const; - //! Return priority of tx at height nHeight - double GetPriority(const CTransaction &tx, int nHeight) const; + /** + * Return priority of tx at height nHeight. Also calculate the sum of the values of the inputs + * that are already in the chain. These are the inputs that will age and increase priority as + * new blocks are added to the chain. + */ + double GetPriority(const CTransaction &tx, int nHeight, CAmount &inChainInputValue) const; const CTxOut &GetOutputFor(const CTxIn& input) const; |