monzero-core.git/src/blockchain_db/blockchain_db.cpp, branch v0.10.0

New "Halfway RingCT" outputs for coinbase transactions

2016-08-28T20:30:26Z

When RingCT is enabled, outputs from coinbase transactions are created as a single output, and stored as RingCT output, with a fake mask. Their amount is not hidden on the blockchain itself, but they are then able to be used as fake inputs in a RingCT ring. Since the output amounts are hidden, their "dustiness" is not an obstacle anymore to mixing, and this makes the coinbase transactions a lot smaller, as well as helping the TXO set to grow more slowly. Also add a new "Null" type of rct signature, which decreases the size required when no signatures are to be stored, as in a coinbase tx.

move the rct commitments to the output_amounts database

2016-08-28T20:29:02Z

Since these are needed at the same time as the output pubkeys, this is a whole lot faster, and takes less space. Only outputs of 0 amount store the commitment. When reading other outputs, a fake commitment is regenerated on the fly. This avoids having to rewrite the database to add space for fake commitments for existing outputs. This code relies on two things: - LMDB must support fixed size records per key, rather than per database (ie, all records on key 0 are the same size, all records for non 0 keys are same size, but records from key 0 and non 0 keys do have different sizes). - the commitment must be directly after the rest of the data in outkey and output_data_t.

add rct to the protocol

2016-08-28T20:28:37Z

It is not yet constrained to a fork, so don't use on the real network or you'll be orphaned or rejected.

Cleanup and clarify

2016-04-05T19:57:45Z

Try to rationalize the variable names, document usage.

Schema update: tx_indices - yet less indirection

2016-04-05T19:54:06Z

Update schema for "tx_outputs" to use array containing amount output indices

2016-04-05T19:30:50Z

This speeds up wallet refresh by directly retrieving a tx's amount output indices. It removes the indirection and walking the amount output duplicate list for every amount in each requested tx. "tx_outputs" is used by: Amount output indices are needed for wallet refresh. Global output indices are needed for removing a tx. Both amount output indices and global output indices are now stored in an array of 64-bit unsigned ints: tx_outputs[] -> [ ] Previously it was: tx_outputs[] -> duplicate list of The amount output list had to be walked for every amount in order to find each amount's output index, by comparing the amount's global output index with each one in the duplicate list until a match was found. See also d045dfa7ce0bf131681193c97560da26f9f37900

read txn/cursor stuff

2016-02-23T20:47:15Z

Could wrap more later.

blockchain_db: pass hard fork object as a simple pointer

2016-02-08T20:56:31Z

Move HardFork DB update to BlockchainDB::add_block()

2016-02-08T17:28:19Z

Ensures the database is consistent. Also simplifes blockchain_import in that verify mode off has less to work around.

Make HardFork object available to BlockchainDB and derived DB implementations

2016-02-08T17:28:17Z

This will later allow the HardFork object's DB update functions to be called when the DB transaction that persists across block add/remove is open.