Prior to this change, calling `join_network` after a network split
only worked in the case that no new non-coinbase transactions were
created during the network partition; in the case that such a
transaction was created, `join_network` would fail when waiting
for mempool synchronization, because zcashd nodes do not.
automatically broadcast their mempool contents on restart.
This change modifies `setup_network` to wait for mempool synchronization
or not on the basis of a newly added do_mempool_sync flag. In the
case of `join_network`, this flag is set to `False`; the default value
is set to `True` to preserve previous functionality elsewhere.
Tests should explicitly use the `resendwallettransactions` RPC method
to ensure that mempool transactions are rebroadcast before attempting
to synchronize the network after a `join_network` call.
We can't actually test rollback via RPC tests until
wallet persistence is implemented. This implements
a rollback scenario that will should pass after wallet
persistence is implemented.
The addition of `OrchardRawAddress` to `RecipientAddress` drives most of
the changes in this commit, which enable `z_sendmany` to send funds to
addresses in the Orchard pool once NU5 activates.
We also add Orchard-specific information to several RPCs in order for
tests to pass:
- `z_listunifiedreceivers`
- `z_getbalanceforaccount`
- `z_getbalanceforviewingkey`
This fixes a potential bug with importing the mnemonic into a third
party transparent wallet. Previously, if a user called `getnewaddress`,
made a bunch of transactions that generated at least 20 change
addresses, and then called `getnewaddress` again, the two external
addresses would be separated by a gap of more than 20. If this mnemonic
were imported into a third party transparent wallet, the wallet would
not detect any funds in the second (or subsequent) transparent addresses
because it would detect 20 unused addresses in a row (via the BIP 44
default gap limit).
Now, we track external and internal keys separately; repeated calls to
`getnewaddress` will return addresses for sequential keys. This has the
added benefit that the sequence of `getnewaddress` outputs will be the
same after restoring from a backup.
We also add a `type` field to the output objects (matching the field in
`z_viewtransaction`), now that the output type can't be distinguished
solely from the address encoding.