WIP implementation of protocol 1.7 #303
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Supposedly it makes a difference (see e.g. [0]), and depending on how batching works it makes sense it would, but during a few full syncs of testnet I've done, it was within measurement error. Still, existing code was already doing this. [0]: https://stackoverflow.com/q/54941342
with the pending db changes, an upgrade is ~as fast as a resync from genesis
now that we have our own txindex
This will allow looking up which tx spent an outpoint.
In Bitcoin consensus, a txout index is stored as a uint32_t. However, in practice, an output in a tx uses at least 10 bytes (for an OP_TRUE output), so - to exhaust a 2 byte namespace, a tx would need to have a size of at least 2 ** 16 * 10 = 655 KB, - to exhaust a 3 byte namespace, a tx would need to have a size of at least 2 ** 24 * 10 = 167 MB.
notifications not implemented yet
Similar to scripthash statuses, the height of an unconfirmed tx is: - `-1` if it has any unconfirmed parents, - `0` otherwise.
History.get_txnums and History.backup depend on ordering of tx_nums, so we want the lexicographical order (used by leveldb comparator) to match the numerical order.
in a way that works consistently between LevelDB and RocksDB.
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WIP implementation of spesmilo/electrum-protocol#2