Add confirmations, blockheight, blockindex and blocktime to z_listreceivedbyaddress
Fixes https://github.com/zcash/zcash/issues/3724
1- There was a PR to add confirmations to this call at https://github.com/zcash/zcash/pull/3836
I ported the commit from there and fixed test case by incrementing the confirmations as suggested at: https://github.com/zcash/zcash/pull/3836#issuecomment-499927807
2- Then added `blockheight`, `blockindex` and `blocktime`. To avoid some duplicated code (Sprout/Sapling) created a structure `trxblock`.
3- Original issue requests only time and blockindex however i think height is also important; if `blockindex` is the position of the transaction in the block then you are going to need also `height` to find it.
z_viewtransaction
This RPC method returns all decryptable information for any transaction in the wallet.
Several values are conditionally included in the output for convenience:
- `recovered`: True if an output is not for a Sapling address in the wallet.
- `memoStr`: The text form of an output's memo, if it is valid UTF-8.
- Values are provided both in decimal currency units, and integer zatoshis.
The p2p_nu_peer_management and rewind_index RPC tests still start from
Sprout, because they are explicitly (and only) testing network behaviour
across network upgrades.
The mempool_tx_input_limit test is removed because the flag has been
ignored since Sapling activation, and will be removed at some point in
the near future.