It isn't clear how a boost::optional that holds 0 (which is the case for
regtest) is coerced to a boolean, unless you pore over the Boost
documentation. An explicit check is clearer.
The min-difficulty change is a bilateral consensus rule change, and so
must be conditionally enabled in order for the earlier section of the
chain to synchronise.
Technically this could be implemented as a network upgrade, but as this will
never be deployed to mainnet, a targeted fork will suffice.
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).
This helps prevent users from triggering an assert if they pass in
Sapling addresses to RPC calls: z_mergetoaddress, z_importviewingkey
and z_exportviewingkey.
Fix signing raw transactions with unsynced offline nodes
This PR address the issue in two different ways:
- In `signrawtransaction` we determine the consensus branch ID (which we then later use to construct the transaction) using the chain height. We now also consider the `APPROX_RELEASE_HEIGHT` as this is a better estimation than 0 for the height of the chain if we are unsynced. (This in and of itself solves the Overwinter signing issue).
- We have added an additional parameter to `signrawtransaction` to allow manually overriding the consensus branch ID that zcashd determines we are on. This allows users to work around corner cases where the first strategy is still insufficient.
Closes#3327.
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.
Fix assertion failure in circuit.merkle_tree_gadget_weirdness test on Windows
zcash-gtest.exe fails
```
[ RUN ] circuit.merkle_tree_gadget_weirdness
Assertion failed!
Program: C:\zcash-gtest.exe
File: ./snark/libsnark/gadgetlib1/gadgets/basic_gadgets.tcc, Line 50
Expression: this->pb.lc_val(packed).as_bigint().num_bits() <= bits.size()
```
The argument type of `__builtin_clzl()` function is unsigned long.
So, we need to replace `__builtin_clzl` with `__builtin_clzll`. (The argument type of `__builtin_clzll()` is unsigned long long (64bit)).
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.
