Use the score index on the mempool to only add sorted txs in order. Remove much of the validation while building the block, relying on mempool to be consistent and only contain txs that can be mined.
The mempool is assumed to be consistent as far as not containing txs which spend non-existent outputs or double spends, and scripts are valid. Finality of txs is still checked (except not coinbase maturity, assumed in mempool).
Still TestBlockValidity in case mempool consistency breaks and return error state if an invalid block was created.
Unit tests are modified to realize that invalid blocks can now be constructed if the mempool breaks its consistency assumptions and also updated to have the right fees, since the cached value is now used for block construction.
Conflicts:
src/miner.cpp
(cherry picked from commit bitcoin/bitcoin@553cad94e2)
Zcash: Merged in our changes.
Under some circumstances it is possible for there to be a significant,
discontinuous jump in a node's clock value. On mining nodes, this can
result in block templates which are no longer valid due to time-based
nLockTime constraints. UpdateTime() is modified so that it will never
decrease a block's nLockTime, thereby preventing such invalidations.
(cherry picked from commit bitcoin/bitcoin@ef8dfe41d1)
Zcash: Updated CreateNewBlock_validity test and wallet_1941 RPC test to
ensure we satisfy the future timestamp soft fork rule.
CalculateMemPoolAncestors was always looping over a transaction's inputs
to find in-mempool parents. When adding a new transaction, this is the
correct behavior, but when removing a transaction, we want to use the
ancestor set that would be calculated by walking mapLinks (which should
in general be the same set, except during a reorg when the mempool is
in an inconsistent state, and the mapLinks-based calculation would be the
correct one).
(cherry picked from commit bitcoin/bitcoin@60de0d5826)
Associate with each CTxMemPoolEntry all the size/fees of descendant
mempool transactions. Sort mempool by max(feerate of entry, feerate
of descendants). Update statistics on-the-fly as transactions enter
or leave the mempool.
Also add ancestor and descendant limiting, so that transactions can
be rejected if the number or size of unconfirmed ancestors exceeds
a target, or if adding a transaction would cause some other mempool
entry to have too many (or too large) a set of unconfirmed in-
mempool descendants.
(cherry picked from commit bitcoin/bitcoin@5add7a74a6)
Zcash:
- Mempool methods were adapted to our mempool changes.
- Default ancestor and descendant size limits were double to account for
our larger block size.
- The mempool_packages RPC test fee was adapted to account for our
emissions curve (which results in a smaller per-block reward that
needs to be split into smaller shards for sequential transactions.
- Includes some modifications to account for us backporting
bitcoin/bitcoin@f3fe83673e early in
zcash/zcash#5269.
for operator->, operator*, and error(). Make these into assertion failures
(this still conforms to the proposal).
Signed-off-by: Daira Hopwood <daira@jacaranda.org>
ShellCheck has started failing in CI. My guess is that the ubuntu-latest runner
now uses a `/bin/sh` that is actually Bash.
- excludes checksec.sh, as it’s not our code
- fixes lints in other files
Alex Morcos
Mark Friedenbach
Jack Grigg
Suhas Daftuar
Suhas Daftuar
Greg Pfeil
Greg Pfeil
Kris Nuttycombe
Daira Hopwood
Greg Pfeil
str4d
Michał Janiszewski