Allow minimum-difficulty blocks on testnet
This is a consensus rule change on testnet that will result in a chain split (leaving the stuck chain, as desired).
Reverts #2766 and part of #1338.
Closes#3552.
A block may be mined with nBits set to the minimum difficulty if its
nTime is set more than six block intervals (15 minutes) after its parent
block.
This is a consensus rule change on testnet that will result in a chain
split (as desired).
Test peer banning logic in both pre- and post-initial block download states
The DoS ban scores are different for each, and it's nice to test both.
Follow-on from #3410.
Refactor ContextualCheckBlock tests
This cleans up and condenses our quadratically-scaling transaction format / consensus rule tests. They still technically scale quadratically, but should be much more readable and manageable now - all that remains in the individual test cases is the specific version flag tweaking we're trying to test.
Closes#3187.
The wallet now only stores Sapling extended spending keys, and thus can
only be used with keys generated from an HDSeed via ZIP 32.
Note that not all Sapling keys in the wallet will correspond to the
wallet's HDSeed, as a standalone Sapling xsk can be imported via
z_importkey. However, it must have been generated from a seed itself,
and thus is more likely to be backed up elsewhere.
Initial cleanup. Reduces duplication of code, especially around
constructing transactions, resetting the activation heights, and setting
up the EXPECT calls for accepting and rejecting tests.
Also adds a bunch of comments explaining the test plan and what
particular parts of the test are doing.
Track Sapling notes and nullifiers in the wallet (in-memory only, no persistence to disk)
Part of #3061. Add in-memory tracking of Sapling notes and nullifiers to the wallet.
Update CCryptoKeyStore with Sapling support
Sapling crypter overrides for various `CCryptoKeyStore` functions such as:
- `HaveSaplingSpendingKey()`
- `GetSaplingSpendingKey()`
Also includes some changes to prepare for diversified addresses and ZIP 32.
Closes#3389
