diff --git a/docs/docs/aztec/concepts/storage/partial_notes.md b/docs/docs/aztec/concepts/storage/partial_notes.md index 7a72ef218148..43ac1cd56f5a 100644 --- a/docs/docs/aztec/concepts/storage/partial_notes.md +++ b/docs/docs/aztec/concepts/storage/partial_notes.md @@ -68,8 +68,8 @@ Now let's do the same for partial notes. ## Partial notes life cycle -1. Create a partial/unfinished note in a private function of your contract --> partial here means that the values within the note are not yet considered finalized (e.g. `amount` in a `TokenNote`), -2. compute a note hiding point of the partial note using a multi scalar multiplication on an elliptic curve. For `TokenNote` this would be done as `G_amt * amount0 + G_npk * npk_m_hash + G_rnd * randomness + G_slot * slot`, where each `G_` is a generator point for a specific field in the note, +1. Create a partial/unfinished note in a private function of your contract --> partial here means that the values within the note are not yet considered finalized (e.g. `value` in a `UintNote`), +2. compute a note hiding point of the partial note using a multi scalar multiplication on an elliptic curve. For `UintNote` this would be done as `G_amt * value0 + G_npk * npk_m_hash + G_rnd * randomness + G_slot * slot`, where each `G_` is a generator point for a specific field in the note, 3. pass the note hiding point to a public function, 4. in a public function determine the value you want to add to the note (e.g. adding a value to an amount) and add it to the note hiding point (e.g. `NOTE_HIDING_POINT + G_amt * amount`), 5. get the note hash by finalizing the note hiding point (the note hash is the x coordinate of the point), @@ -136,7 +136,7 @@ Then we just emit `P_a.x` and `P_b.x` as a note hashes, and we're done! This is implemented in the example token contract: -#include_code compute_note_hiding_point noir-projects/noir-contracts/contracts/token_contract/src/types/token_note.nr rust +#include_code compute_note_hiding_point noir-projects/aztec-nr/uint-note/src/uint_note.nr rust Those `G_x` are generators that generated [here](https://github.com/AztecProtocol/aztec-packages/blob/#include_aztec_version/noir-projects/noir-projects/aztec-nr/aztec/src/generators.nr). Anyone can use them for separating different fields in a "partial note". diff --git a/docs/docs/guides/developer_guides/smart_contracts/how_to_compile_contract.md b/docs/docs/guides/developer_guides/smart_contracts/how_to_compile_contract.md index e2b4fa891f0c..da068369be3f 100644 --- a/docs/docs/guides/developer_guides/smart_contracts/how_to_compile_contract.md +++ b/docs/docs/guides/developer_guides/smart_contracts/how_to_compile_contract.md @@ -146,7 +146,7 @@ export class TokenContract extends ContractBase { }, balances: { slot: new Fr(3n), - typ: 'BalancesMap', + typ: 'BalancesMap', }, total_supply: { slot: new Fr(4n), @@ -185,16 +185,16 @@ export class TokenContract extends ContractBase { >; } - public static get notes(): ContractNotes<'TransparentNote' | 'TokenNote'> { + public static get notes(): ContractNotes<'TransparentNote' | 'UintNote'> { const notes = this.artifact.outputs.globals.notes ? (this.artifact.outputs.globals.notes as any) : []; return { TransparentNote: { id: new Fr(84114971101151129711410111011678111116101n), }, - TokenNote: { + UintNote: { id: new Fr(8411110710111078111116101n), }, - } as ContractNotes<'TransparentNote' | 'TokenNote'>; + } as ContractNotes<'TransparentNote' | 'UintNote'>; } /** Type-safe wrappers for the public methods exposed by the contract. */ diff --git a/docs/docs/guides/developer_guides/smart_contracts/writing_contracts/storage/storage_slots.md b/docs/docs/guides/developer_guides/smart_contracts/writing_contracts/storage/storage_slots.md index ba3c45fe4c69..e19ac04d8564 100644 --- a/docs/docs/guides/developer_guides/smart_contracts/writing_contracts/storage/storage_slots.md +++ b/docs/docs/guides/developer_guides/smart_contracts/writing_contracts/storage/storage_slots.md @@ -27,12 +27,12 @@ sequenceDiagram BalanceMap->>BalanceMap: derived_slot = H(map_slot, to) BalanceMap->>BalanceSet: BalanceSet::new(to, derived_slot) Token->>BalanceSet: to_bal.add(amount) - BalanceSet->>BalanceSet: note = TokenNote::new(amount, to) + BalanceSet->>BalanceSet: note = UintNote::new(amount, to) BalanceSet->>Set: insert(note) Set->>LifeCycle: create_note(derived_slot, note) LifeCycle->>LifeCycle: note.header = NoteHeader { contract_address,
storage_slot: derived_slot, nonce: 0, note_hash_counter } - Utils->>TokenNote: note_hiding_point = note.compute_note_hiding_point() - TokenNote->>Utils: note_hash = note_hiding_point.x + Utils->>UintNote: note_hiding_point = note.compute_note_hiding_point() + UintNote->>Utils: note_hash = note_hiding_point.x LifeCycle->>Context: push_note_hash(note_hash) end Context->>Kernel: unique_note_hash = H(nonce, note_hash) diff --git a/docs/docs/tutorials/codealong/contract_tutorials/token_contract.md b/docs/docs/tutorials/codealong/contract_tutorials/token_contract.md index 26ae89d4570f..2ff8ed8afe07 100644 --- a/docs/docs/tutorials/codealong/contract_tutorials/token_contract.md +++ b/docs/docs/tutorials/codealong/contract_tutorials/token_contract.md @@ -52,7 +52,7 @@ compressed_string = {git="https://github.com/AztecProtocol/aztec-packages/", tag We will be working within `main.nr` for the rest of the tutorial. -## How this will work +## How this will work Before writing the functions, let's go through them to see how this contract will work: @@ -158,7 +158,7 @@ Reading through the storage variables: - `admin` an Aztec address stored in public state. - `minters` is a mapping of Aztec addresses in public state. This will store whether an account is an approved minter on the contract. -- `balances` is a mapping of private balances. Private balances are stored in a `PrivateSet` of `TokenNote`s. The balance is the sum of all of an account's `TokenNote`s. +- `balances` is a mapping of private balances. Private balances are stored in a `PrivateSet` of `UintNote`s. The balance is the sum of all of an account's `UintNote`s. - `total_supply` is an unsigned integer (max 128 bit value) stored in public state and represents the total number of tokens minted. - `pending_shields` is a `PrivateSet` of `TransparentNote`s stored in private state. What is stored publicly is a set of commitments to `TransparentNote`s. - `public_balances` is a mapping of Aztec addresses in public state and represents the publicly viewable balances of accounts. @@ -259,7 +259,7 @@ Storage is referenced as `storage.variable`. #### `redeem_shield` -This private function enables an account to move tokens from a `TransparentNote` in the `pending_shields` mapping to a `TokenNote` in private `balances`. The `TokenNote` will be associated with a nullifier key, so any account that knows this key can spend this note. +This private function enables an account to move tokens from a `TransparentNote` in the `pending_shields` mapping to a `UintNote` in private `balances`. The `UintNote` will be associated with a nullifier key, so any account that knows this key can spend this note. Going through the function logic, first the `secret_hash` is generated from the given secret. This ensures that only the entity possessing the secret can use it to redeem the note. Following this, a `TransparentNote` is retrieved from the set, using the provided amount and secret. The note is subsequently removed from the set, allowing it to be redeemed only once. The recipient's private balance is then increased using the `increment` helper function from the `value_note` [library (GitHub link)](https://github.com/AztecProtocol/aztec-packages/blob/#include_aztec_version/noir-projects/aztec-nr/value-note/src/utils.nr). @@ -269,7 +269,7 @@ The function returns `1` to indicate successful execution. #### `unshield` -This private function enables un-shielding of private `TokenNote`s stored in `balances` to any Aztec account's `public_balance`. +This private function enables un-shielding of private `UintNote`s stored in `balances` to any Aztec account's `public_balance`. After initializing storage, the function checks that the `msg_sender` is authorized to spend tokens. See [the Authorizing token spends section](#authorizing-token-spends) above for more detail--the only difference being that `assert_valid_message_for` is modified to work specifically in the private context. After the authorization check, the sender's private balance is decreased using the `decrement` helper function for the `value_note` library. Then it stages a public function call on this contract ([`_increase_public_balance`](#_increase_public_balance)) to be executed in the [public execution phase](#execution-contexts) of transaction execution. `_increase_public_balance` is marked as an `internal` function, so can only be called by this token contract. diff --git a/noir-projects/aztec-nr/uint-note/src/uint_note.nr b/noir-projects/aztec-nr/uint-note/src/uint_note.nr index 56def7421ae2..b4af876a07c2 100644 --- a/noir-projects/aztec-nr/uint-note/src/uint_note.nr +++ b/noir-projects/aztec-nr/uint-note/src/uint_note.nr @@ -1,17 +1,19 @@ use dep::aztec::{ generators::{Ga1 as G_amt, Ga2 as G_npk, Ga3 as G_rnd, G_slot}, - prelude::{NoteInterface, PrivateContext}, + prelude::{NoteHeader, NoteInterface, PrivateContext}, protocol_types::{ - constants::GENERATOR_INDEX__NOTE_NULLIFIER, point::{Point, POINT_LENGTH}, + constants::GENERATOR_INDEX__NOTE_NULLIFIER, point::{Point, POINT_LENGTH}, scalar::Scalar, hash::poseidon2_hash_with_separator, traits::Serialize }, - note::utils::compute_note_hash_for_nullify, keys::getters::get_nsk_app + note::utils::compute_note_hash_for_nullify, oracle::unsafe_rand::unsafe_rand, + keys::getters::get_nsk_app }; use dep::std::{embedded_curve_ops::multi_scalar_mul, hash::from_field_unsafe}; global UINT_NOTE_LEN: u32 = 3; // 3 plus a header. global UINT_NOTE_BYTES_LEN: u32 = 3 * 32 + 64; +// docs:start:TokenNote #[aztec(note)] struct UintNote { // The integer stored by the note @@ -21,8 +23,10 @@ struct UintNote { // Randomness of the note to hide its contents randomness: Field, } +// docs:end:TokenNote impl NoteInterface for UintNote { + // docs:start:nullifier fn compute_nullifier(self, context: &mut PrivateContext, note_hash_for_nullify: Field) -> Field { let secret = context.request_nsk_app(self.npk_m_hash); poseidon2_hash_with_separator( @@ -33,6 +37,7 @@ impl NoteInterface for UintNote { GENERATOR_INDEX__NOTE_NULLIFIER as Field ) } + // docs:end:nullifier fn compute_nullifier_without_context(self) -> Field { let note_hash_for_nullify = compute_note_hash_for_nullify(self); @@ -63,13 +68,18 @@ impl NoteInterface for UintNote { } impl UintNote { - // TODO: Merge this func with `compute_note_hiding_point`. I (benesjan) didn't do it in the initial PR to not have + // TODO(#8290): Merge this func with `compute_note_hiding_point`. I (benesjan) didn't do it in the initial PR to not have // to modify macros and all the related funcs in it. fn to_note_hiding_point(self) -> UintNoteHidingPoint { UintNoteHidingPoint::new(self.compute_note_hiding_point()) } + + fn new(value: U128, npk_m_hash: Field) -> Self { + Self { value, npk_m_hash, randomness: unsafe_rand(), header: NoteHeader::empty() } + } } +// TODO(#8290): Auto-generate this struct UintNoteHidingPoint { inner: Point } diff --git a/noir-projects/noir-contracts/contracts/token_contract/src/main.nr b/noir-projects/noir-contracts/contracts/token_contract/src/main.nr index 6d68cc7330a8..f6c1796a2d1d 100644 --- a/noir-projects/noir-contracts/contracts/token_contract/src/main.nr +++ b/noir-projects/noir-contracts/contracts/token_contract/src/main.nr @@ -62,7 +62,7 @@ contract Token { minters: Map>, // docs:end:storage_minters // docs:start:storage_balances - balances: Map>, + balances: Map, // docs:end:storage_balances total_supply: PublicMutable, // docs:start:storage_pending_shields diff --git a/noir-projects/noir-contracts/contracts/token_contract/src/test/refunds.nr b/noir-projects/noir-contracts/contracts/token_contract/src/test/refunds.nr index 59c382f3289c..d57f84050d0c 100644 --- a/noir-projects/noir-contracts/contracts/token_contract/src/test/refunds.nr +++ b/noir-projects/noir-contracts/contracts/token_contract/src/test/refunds.nr @@ -46,21 +46,21 @@ unconstrained fn setup_refund_success() { // `executePublicFunction` TXE oracle) but we need to notify TXE of the note (preimage). env.add_note( &mut UintNote { - value: U128::from_integer(funded_amount - 1), - npk_m_hash: user_npk_m_hash, - randomness: user_randomness, - header: NoteHeader::empty() - }, + value: U128::from_integer(funded_amount - 1), + npk_m_hash: user_npk_m_hash, + randomness: user_randomness, + header: NoteHeader::empty() + }, user_balances_slot, token_contract_address ); env.add_note( &mut UintNote { - value: U128::from_integer(1), - npk_m_hash: fee_payer_npk_m_hash, - randomness: fee_payer_randomness, - header: NoteHeader::empty() - }, + value: U128::from_integer(1), + npk_m_hash: fee_payer_npk_m_hash, + randomness: fee_payer_randomness, + header: NoteHeader::empty() + }, fee_payer_balances_slot, token_contract_address ); diff --git a/noir-projects/noir-contracts/contracts/token_contract/src/types/balance_set.nr b/noir-projects/noir-contracts/contracts/token_contract/src/types/balance_set.nr index 3ff921e3d043..15543c4e7f6f 100644 --- a/noir-projects/noir-contracts/contracts/token_contract/src/types/balance_set.nr +++ b/noir-projects/noir-contracts/contracts/token_contract/src/types/balance_set.nr @@ -1,32 +1,28 @@ -use dep::aztec::prelude::{NoteGetterOptions, NoteViewerOptions, NoteInterface, PrivateSet, Point}; +use dep::aztec::prelude::{NoteGetterOptions, NoteViewerOptions, PrivateSet}; use dep::aztec::{ context::{PrivateContext, UnconstrainedContext}, protocol_types::constants::MAX_NOTE_HASH_READ_REQUESTS_PER_CALL, - note::{note_getter::view_notes, note_emission::{NoteEmission, OuterNoteEmission}}, - keys::{getters::get_public_keys, public_keys::NpkM} + note::note_emission::OuterNoteEmission, keys::public_keys::NpkM }; -use dep::uint_note::uint_note::OwnedNote; +use dep::uint_note::uint_note::UintNote; -struct BalanceSet { - set: PrivateSet, +struct BalanceSet { + set: PrivateSet, } -impl BalanceSet { +impl BalanceSet { pub fn new(context: Context, storage_slot: Field) -> Self { assert(storage_slot != 0, "Storage slot 0 not allowed. Storage slots must start from 1."); Self { set: PrivateSet::new(context, storage_slot) } } } -impl BalanceSet { - unconstrained pub fn balance_of(self: Self) -> U128 where T: NoteInterface + OwnedNote { +impl BalanceSet { + unconstrained pub fn balance_of(self: Self) -> U128 { self.balance_of_with_offset(0) } - unconstrained pub fn balance_of_with_offset( - self: Self, - offset: u32 - ) -> U128 where T: NoteInterface + OwnedNote { + unconstrained pub fn balance_of_with_offset(self: Self, offset: u32) -> U128 { let mut balance = U128::from_integer(0); // docs:start:view_notes let mut options = NoteViewerOptions::new(); @@ -34,7 +30,7 @@ impl BalanceSet { // docs:end:view_notes for i in 0..options.limit { if i < notes.len() { - balance = balance + notes.get_unchecked(i).get_amount(); + balance = balance + notes.get_unchecked(i).value; } } if (notes.len() == options.limit) { @@ -45,17 +41,13 @@ impl BalanceSet { } } -impl BalanceSet { - pub fn add( - self: Self, - owner_npk_m: NpkM, - addend: U128 - ) -> OuterNoteEmission where T: NoteInterface + OwnedNote + Eq { +impl BalanceSet<&mut PrivateContext> { + pub fn add(self: Self, owner_npk_m: NpkM, addend: U128) -> OuterNoteEmission { if addend == U128::from_integer(0) { OuterNoteEmission::new(Option::none()) } else { // We fetch the nullifier public key hash from the registry / from our PXE - let mut addend_note = T::new(addend, owner_npk_m.hash()); + let mut addend_note = UintNote::new(addend, owner_npk_m.hash()); // docs:start:insert OuterNoteEmission::new(Option::some(self.set.insert(&mut addend_note))) @@ -63,11 +55,7 @@ impl BalanceSet { } } - pub fn sub( - self: Self, - owner_npk_m: NpkM, - amount: U128 - ) -> OuterNoteEmission where T: NoteInterface + OwnedNote + Eq { + pub fn sub(self: Self, owner_npk_m: NpkM, amount: U128) -> OuterNoteEmission { let subtracted = self.try_sub(amount, MAX_NOTE_HASH_READ_REQUESTS_PER_CALL); // try_sub may have substracted more or less than amount. We must ensure that we subtracted at least as much as @@ -85,11 +73,7 @@ impl BalanceSet { // The `max_notes` parameter is used to fine-tune the number of constraints created by this function. The gate count // scales relatively linearly with `max_notes`, but a lower `max_notes` parameter increases the likelihood of // `try_sub` subtracting an amount smaller than `target_amount`. - pub fn try_sub( - self: Self, - target_amount: U128, - max_notes: u32 - ) -> U128 where T: NoteInterface + OwnedNote + Eq { + pub fn try_sub(self: Self, target_amount: U128, max_notes: u32) -> U128 { // We are using a preprocessor here (filter applied in an unconstrained context) instead of a filter because // we do not need to prove correct execution of the preprocessor. // Because the `min_sum` notes is not constrained, users could choose to e.g. not call it. However, all this @@ -102,7 +86,7 @@ impl BalanceSet { for i in 0..options.limit { if i < notes.len() { let note = notes.get_unchecked(i); - subtracted = subtracted + note.get_amount(); + subtracted = subtracted + note.value; } } @@ -115,10 +99,10 @@ impl BalanceSet { // The preprocessor (a filter applied in an unconstrained context) does not check if total sum is larger or equal to // 'min_sum' - all it does is remove extra notes if it does reach that value. // Note that proper usage of this preprocessor requires for notes to be sorted in descending order. -pub fn preprocess_notes_min_sum( - notes: [Option; MAX_NOTE_HASH_READ_REQUESTS_PER_CALL], +pub fn preprocess_notes_min_sum( + notes: [Option; MAX_NOTE_HASH_READ_REQUESTS_PER_CALL], min_sum: U128 -) -> [Option; MAX_NOTE_HASH_READ_REQUESTS_PER_CALL] where T: NoteInterface + OwnedNote { +) -> [Option; MAX_NOTE_HASH_READ_REQUESTS_PER_CALL] { let mut selected = [Option::none(); MAX_NOTE_HASH_READ_REQUESTS_PER_CALL]; let mut sum = U128::from_integer(0); for i in 0..notes.len() { @@ -129,7 +113,7 @@ pub fn preprocess_notes_min_sum { t.aliceAddress, token.address, deriveStorageSlotInMap(TokenContract.storage.balances.slot, t.aliceAddress), - TokenContract.notes.IntNote.id, + TokenContract.notes.UintNote.id, txHash, ), ); @@ -120,7 +120,7 @@ describe('e2e_fees/private_refunds', () => { t.bobAddress, token.address, deriveStorageSlotInMap(TokenContract.storage.balances.slot, t.bobAddress), - TokenContract.notes.IntNote.id, + TokenContract.notes.UintNote.id, txHash, ), );