When processing a new transaction, in addition to spending the Coins of its txin's it creates a new Coins for its outputs. The existing ModifyCoins function will first make sure this Coins does not already exist. It can not exist due to BIP 30, but because of that the lookup can't be cached and always has to go to the database. Since we are creating the coins to match the new tx anyway, there is no point in checking if they exist first anyway.
Zcash: Modified to account for the fact that BIP 30 and BIP 34 have applied
from the beginning.
Closes#3467. Add benchmarks for Sapling spends and outputs.
Four new benchmarks are added to RPC zcbenchmark:
- createsaplingspend
- createsaplingoutput
- verifysaplingspend
- verifysaplingoutput
Remove GetUnspentFilteredNotes
Closes#3580
This PR generalized `GetFilteredNotes`, expanding its functionality to also do what we do in `GetUnspentFilteredNotes`. This enables us to remove the latter.
Make it clear that CWallet::GenerateNewZKey is Sprout specific
Closes https://github.com/zcash/zcash/issues/3577
When adding sapling support we had considered making the method `GenerateNewZKey` generic, but it ended up making more sense to add a second method `GenerateNewSaplingZKey` for sapling support.
This PR changes the name of `GenerateNewZKey` to `GenerateNewSproutZKey` and changes the return type from `libzcash::PaymentAddress` to `libzcash::SproutPaymentAddress` to make it more clear that this is what the method does.
Clarify in sendmany/z_sendmany rpc docs that amounts are not FP
Fixes#3539
I clarified in the docs that only 8 digits of precision are allowed. For example, if you try 9 digits you will get:
```
zcash-cli z_sendmany $TADDR "[{\"address\":\"$ZADDR\",\"amount\":0.123456789}]"
error code: -3
error message:
Invalid amount
```
Better error message when sending to both sprout and sapling
When trying to send to both Sprout and Sapling (not currently supported with z_sendmany) we were getting the following error in our operation result: `general exception: boost::bad_get: failed value get using boost::get`.
This PR changes this to fail with a better error message before the async operation begins:
```
error code: -8
error message:
Cannot send to both Sprout and Sapling addresses using z_sendmany
```
Resolves Sapling nullifier persistence issue when importing a key.
During a rescan, a CWalletTx was persisted to disk before it had its
note data set. This meant that upon restart, the CWalletTx would
potentially be missing its nullifiers causing the balance to include
notes which had already been spent.
The resolution is to force a CWalletTx to be persisted after it has had
its nullifiers set correctly, before the note witnesses are updated.
During a rescan, a CWalletTx was persisted to disk before it had its
note data set. This meant that upon restart, the CWalletTx would
potentially be missing its nullifiers causing the wallet's balance
to include notes which had already been spent.
The resolution is to ensure that after a rescan, a CWalletTx is
persisted after it has had its nullifiers set correctly.
Co-authored-by: Eirik Ogilvie-Wigley <eirik@z.cash>
The original commitments were SHA256 outputs, and some were outside the
scalar field. This didn't affect the Merkle hash, which drops the high
bit from each commitment, but it does affect the creation of the Merkle
path in Rust, which requires path nodes to be valid scalars.
Here, we explicitly drop the high bit of all test vector commitments,
as well as reducing the two that remain outside the field. The test
vectors still pass, and can now also be used in the Rust implementation.
Eirik Ogilvie-Wigley
Larry Ruane
Jack Grigg
Alex Morcos
Pieter Wuille
Homu
Simon
Jonathan "Duke" Leto
arielgabizon
mdr0id