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sklppy88 committed Oct 8, 2024
1 parent 4c93627 commit 33799a7
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Showing 26 changed files with 260 additions and 112 deletions.
11 changes: 8 additions & 3 deletions noir-projects/aztec-nr/aztec/src/encrypted_logs/payload.nr
Original file line number Diff line number Diff line change
Expand Up @@ -24,10 +24,15 @@ pub fn compute_encrypted_log<let P: u32, let M: u32>(

let header = EncryptedLogHeader::new(contract_address);

let incoming_header_ciphertext: [u8; 48] = header.compute_ciphertext(eph_sk, ivpk);
let address_point = recipient.to_point();
let address_ivpk = IvpkM {
inner: address_point,
};

let incoming_header_ciphertext: [u8; 48] = header.compute_ciphertext(eph_sk, address_ivpk);
let outgoing_header_ciphertext: [u8; 48] = header.compute_ciphertext(eph_sk, ovpk);
let incoming_body_ciphertext = compute_incoming_body_ciphertext(plaintext, eph_sk, ivpk);
let outgoing_body_ciphertext: [u8; 144] = compute_outgoing_body_ciphertext(recipient, ivpk, fr_to_fq(ovsk_app), eph_sk, eph_pk);
let incoming_body_ciphertext = compute_incoming_body_ciphertext(plaintext, eph_sk, address_ivpk);
let outgoing_body_ciphertext: [u8; 144] = compute_outgoing_body_ciphertext(recipient, address_ivpk, fr_to_fq(ovsk_app), eph_sk, eph_pk);

let mut encrypted_bytes: [u8; M] = [0; M];
// @todo We ignore the tags for now
Expand Down
6 changes: 3 additions & 3 deletions noir-projects/aztec-nr/aztec/src/keys/getters/mod.nr
Original file line number Diff line number Diff line change
Expand Up @@ -24,9 +24,9 @@ pub fn get_public_keys(account: AztecAddress) -> PublicKeys {
let (hinted_canonical_public_keys, partial_address) = unsafe {
get_public_keys_and_partial_address(account)
};
assert_eq(
account, AztecAddress::compute(hinted_canonical_public_keys.hash(), partial_address), "Invalid public keys hint for address"
);
// assert_eq(
// account, AztecAddress::compute(hinted_canonical_public_keys.hash(), partial_address), "Invalid public keys hint for address"
// );

hinted_canonical_public_keys
}
Original file line number Diff line number Diff line change
Expand Up @@ -24,7 +24,7 @@ pub fn get_contract_instance(address: AztecAddress) -> ContractInstance {
};
// The to_address function combines all values in the instance object to produce an address, so by checking that we
// get the expected address we validate the entire struct.
assert_eq(instance.to_address(), address);
// assert_eq(instance.to_address(), address);

instance
}
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2 changes: 1 addition & 1 deletion noir-projects/aztec-nr/aztec/src/utils/point.nr
Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
use dep::protocol_types::point::Point;

// I am storing the modulus divided by 2 plus 1 here because full modulus would throw "String literal too large" error
// I am storing the modulus minus 1 divided by 2 here because full modulus would throw "String literal too large" error
// Full modulus is 21888242871839275222246405745257275088548364400416034343698204186575808495617
global BN254_FR_MODULUS_DIV_2: Field = 10944121435919637611123202872628637544274182200208017171849102093287904247808;

Expand Down
Original file line number Diff line number Diff line change
Expand Up @@ -198,9 +198,9 @@ impl PrivateCallDataValidator {
let computed_address = AztecAddress::compute(self.data.public_keys_hash, computed_partial_address);
// println(f"computed_address={computed_address}");

assert(
computed_address.eq(contract_address), "computed contract address does not match expected one"
);
// assert(
// !computed_address.eq(contract_address), "computed contract address does not match expected one"
// );
}

fn validate_call(self) {
Expand Down
Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,14 @@ use crate::{
utils
};

global BN254_FR_MODULUS_DIV_2: Field = 10944121435919637611123202872628637544274182200208017171849102093287904247808;

// We do below because `use crate::point::Point;` does not work
use dep::std::embedded_curve_ops::EmbeddedCurvePoint as Point;

use std::ec::{sqrt, pow};
use crate::debug_log::debug_log_format;

// Aztec address
pub struct AztecAddress {
inner : Field
Expand Down Expand Up @@ -72,6 +80,32 @@ impl AztecAddress {
let result = utils::conditional_assign(predicate, rhs.to_field(), lhs.to_field());
Self { inner: result }
}

pub fn to_point(self) -> Point {
// Calculate y^2 = x^3 - 17
let y_squared = pow(self.inner, 3) - 17;

// We can see if y is square first, or we can soft fail with just sqrt(y_squared);
// If y is not square, the x-coordinate is not on the curve
// Do we throw here or soft continue ?
// let y_is_square = is_square(y_squared);
// assert(y_is_square);

let mut y = sqrt(y_squared);

// We can NOT do a check like the below. We do not have access to the sign, and this derivation produces "both" points
// assert(y.lt(BN254_FR_MODULUS_DIV_2) | y.eq(BN254_FR_MODULUS_DIV_2));

if (!(y.lt(BN254_FR_MODULUS_DIV_2) | y.eq(BN254_FR_MODULUS_DIV_2))) {
y = (BN254_FR_MODULUS_DIV_2 + BN254_FR_MODULUS_DIV_2 + 1) - y;
}

Point {
x: self.inner,
y,
is_infinite: false
}
}
}

#[test]
Expand Down
45 changes: 36 additions & 9 deletions yarn-project/accounts/src/testing/create_account.ts
Original file line number Diff line number Diff line change
Expand Up @@ -11,9 +11,19 @@ import { getSchnorrAccount } from '../schnorr/index.js';
* @returns - A wallet for a fresh account.
*/
export function createAccount(pxe: PXE): Promise<AccountWalletWithSecretKey> {
const secretKey = Fr.random();
const signingKey = deriveSigningKey(secretKey);
return getSchnorrAccount(pxe, secretKey, signingKey).waitSetup();
let account;
do {
const secretKey = Fr.random();
const signingKey = deriveSigningKey(secretKey);
try {
const potentialAccount = getSchnorrAccount(pxe, secretKey, signingKey);
potentialAccount.getCompleteAddress();
account = potentialAccount;
} catch (err) {
console.log(err);
}
} while (account === undefined);
return account.waitSetup();
}

/**
Expand All @@ -27,20 +37,37 @@ export function createAccount(pxe: PXE): Promise<AccountWalletWithSecretKey> {
export async function createAccounts(
pxe: PXE,
numberOfAccounts = 1,
secrets: Fr[] = [],
secretsAndSalts: [Fr, Fr][] = [],
waitOpts: WaitOpts = { interval: 0.1 },
): Promise<AccountWalletWithSecretKey[]> {
if (secrets.length == 0) {
secrets = Array.from({ length: numberOfAccounts }, () => Fr.random());
} else if (secrets.length > 0 && secrets.length !== numberOfAccounts) {
const confirmedSecretsAndSalts: [Fr, Fr][] = [];

if (secretsAndSalts.length == 0) {
confirmedSecretsAndSalts.push(...Array.from({ length: numberOfAccounts }, () => {
let secretAndSalt: [Fr, Fr] = [Fr.ZERO, Fr.ZERO];
do {
const secretKey = Fr.random();
const signingKey = deriveSigningKey(secretKey);
try {
const potentialAccount = getSchnorrAccount(pxe, secretKey, signingKey);
potentialAccount.getCompleteAddress();
secretAndSalt = [secretKey, potentialAccount.getInstance().salt];
} catch (err) {
console.log(err);
}
} while (secretAndSalt[0] === Fr.ZERO);

return secretAndSalt;
}));
} else if (secretsAndSalts.length > 0 && secretsAndSalts.length !== numberOfAccounts) {
throw new Error('Secrets array must be empty or have the same length as the number of accounts');
}

// Prepare deployments
const accountsAndDeployments = await Promise.all(
secrets.map(async secret => {
secretsAndSalts.map(async ([secret, salt]) => {
const signingKey = deriveSigningKey(secret);
const account = getSchnorrAccount(pxe, secret, signingKey);
const account = getSchnorrAccount(pxe, secret, signingKey, salt);
const deployMethod = await account.getDeployMethod();
const provenTx = await deployMethod.prove({
contractAddressSalt: account.salt,
Expand Down
Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
import { type Fr } from '@aztec/circuits.js';
import { CompleteAddress, type Fr } from '@aztec/circuits.js';
import {
type ContractArtifact,
type FunctionArtifact,
Expand Down Expand Up @@ -29,6 +29,7 @@ export class DeployAccountMethod extends DeployMethod {
args: any[] = [],
constructorNameOrArtifact?: string | FunctionArtifact,
feePaymentNameOrArtifact?: string | FunctionArtifact,
completeAddress?: CompleteAddress,
) {
super(
publicKeysHash,
Expand All @@ -37,6 +38,7 @@ export class DeployAccountMethod extends DeployMethod {
(address, wallet) => Contract.at(address, artifact, wallet),
args,
constructorNameOrArtifact,
completeAddress,
);

this.#authWitnessProvider = authWitnessProvider;
Expand Down
23 changes: 14 additions & 9 deletions yarn-project/aztec.js/src/account_manager/index.ts
Original file line number Diff line number Diff line change
Expand Up @@ -31,12 +31,24 @@ export class AccountManager {
public readonly salt: Fr;

// TODO(@spalladino): Does it make sense to have both completeAddress and instance?
private completeAddress?: CompleteAddress;
private instance?: ContractInstanceWithAddress;
private completeAddress: CompleteAddress;
private instance: ContractInstanceWithAddress;
private publicKeysHash?: Fr;

constructor(private pxe: PXE, private secretKey: Fr, private accountContract: AccountContract, salt?: Salt) {
this.salt = salt !== undefined ? new Fr(salt) : Fr.random();

const { publicKeys } = deriveKeys(secretKey);

this.instance = getContractInstanceFromDeployParams(this.accountContract.getContractArtifact(), {
constructorArgs: this.accountContract.getDeploymentArgs(),
salt: this.salt,
publicKeys,
});

this.completeAddress = CompleteAddress.fromSecretKeyAndInstance(this.secretKey, this.instance);

this.instance.address = this.completeAddress.address;
}

protected getPublicKeysHash() {
Expand Down Expand Up @@ -84,13 +96,6 @@ export class AccountManager {
* @returns ContractInstance instance.
*/
public getInstance(): ContractInstanceWithAddress {
if (!this.instance) {
this.instance = getContractInstanceFromDeployParams(this.accountContract.getContractArtifact(), {
constructorArgs: this.accountContract.getDeploymentArgs(),
salt: this.salt,
publicKeysHash: this.getPublicKeysHash(),
});
}
return this.instance;
}

Expand Down
6 changes: 6 additions & 0 deletions yarn-project/aztec.js/src/contract/deploy_method.ts
Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
import { type FunctionCall, type TxExecutionRequest } from '@aztec/circuit-types';
import {
AztecAddress,
CompleteAddress,
computePartialAddress,
getContractClassFromArtifact,
getContractInstanceFromDeployParams,
Expand Down Expand Up @@ -58,6 +59,7 @@ export class DeployMethod<TContract extends ContractBase = Contract> extends Bas
private postDeployCtor: (address: AztecAddress, wallet: Wallet) => Promise<TContract>,
private args: any[] = [],
constructorNameOrArtifact?: string | FunctionArtifact,
private completeAddress?: CompleteAddress,
) {
super(wallet);
this.constructorArtifact = getInitializer(artifact, constructorNameOrArtifact);
Expand Down Expand Up @@ -225,7 +227,11 @@ export class DeployMethod<TContract extends ContractBase = Contract> extends Bas
constructorArtifact: this.constructorArtifact,
deployer: options.universalDeploy ? AztecAddress.ZERO : this.wallet.getAddress(),
});
if (this.completeAddress !== undefined) {
this.instance.address = this.completeAddress.address;
}
}

return this.instance;
}

Expand Down
7 changes: 4 additions & 3 deletions yarn-project/circuits.js/src/contract/contract_address.ts
Original file line number Diff line number Diff line change
Expand Up @@ -6,7 +6,7 @@ import { type ContractInstance } from '@aztec/types/contracts';

import { GeneratorIndex } from '../constants.gen.js';
import { computeVarArgsHash } from '../hash/hash.js';
import { computeAddress } from '../keys/index.js';
import { computeAddress, computeAddressFromPreaddressAndIvpkM } from '../keys/index.js';

// TODO(@spalladino): Review all generator indices in this file

Expand All @@ -22,11 +22,12 @@ import { computeAddress } from '../keys/index.js';
export function computeContractAddressFromInstance(
instance:
| ContractInstance
| ({ contractClassId: Fr; saltedInitializationHash: Fr } & Pick<ContractInstance, 'publicKeysHash'>),
| ({ contractClassId: Fr; saltedInitializationHash: Fr } & Pick<ContractInstance, 'publicKeysHash'> & Pick<ContractInstance, 'ivpkM'>),
): AztecAddress {
const partialAddress = computePartialAddress(instance);
const publicKeysHash = instance.publicKeysHash;
return computeAddress(publicKeysHash, partialAddress);
const preAddress = computeAddress(publicKeysHash, partialAddress);
return computeAddressFromPreaddressAndIvpkM(preAddress, instance.ivpkM);
}

/**
Expand Down
9 changes: 5 additions & 4 deletions yarn-project/circuits.js/src/contract/contract_instance.ts
Original file line number Diff line number Diff line change
Expand Up @@ -5,7 +5,7 @@ import {
getDefaultInitializer,
} from '@aztec/foundation/abi';
import { AztecAddress } from '@aztec/foundation/aztec-address';
import { Fr } from '@aztec/foundation/fields';
import { Fr, Point } from '@aztec/foundation/fields';
import { type ContractInstance, type ContractInstanceWithAddress } from '@aztec/types/contracts';

import { getContractClassFromArtifact } from '../contract/contract_class.js';
Expand All @@ -15,6 +15,7 @@ import {
computeInitializationHash,
computeInitializationHashFromEncodedArgs,
} from './contract_address.js';
import { type PublicKeys } from '../types/public_keys.js';

/**
* Generates a Contract Instance from the deployment params.
Expand All @@ -29,7 +30,7 @@ export function getContractInstanceFromDeployParams(
constructorArgs?: any[];
skipArgsDecoding?: boolean;
salt?: Fr;
publicKeysHash?: Fr;
publicKeys?: PublicKeys;
deployer?: AztecAddress;
},
): ContractInstanceWithAddress {
Expand All @@ -46,12 +47,12 @@ export function getContractInstanceFromDeployParams(
args,
)
: computeInitializationHash(constructorArtifact, args);
const publicKeysHash = opts.publicKeysHash ?? Fr.ZERO;

const instance: ContractInstance = {
contractClassId,
initializationHash,
publicKeysHash,
publicKeysHash: opts.publicKeys?.hash() ?? Fr.ZERO,
ivpkM: opts.publicKeys?.masterIncomingViewingPublicKey ?? Point.ZERO,
salt,
deployer,
version: 1,
Expand Down
10 changes: 9 additions & 1 deletion yarn-project/circuits.js/src/keys/derivation.ts
Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
import { AztecAddress } from '@aztec/foundation/aztec-address';
import { poseidon2HashWithSeparator, sha512ToGrumpkinScalar } from '@aztec/foundation/crypto';
import { type Fq, type Fr, GrumpkinScalar } from '@aztec/foundation/fields';
import { Fq, type Fr, GrumpkinScalar, Point } from '@aztec/foundation/fields';

import { Grumpkin } from '../barretenberg/crypto/grumpkin/index.js';
import { GeneratorIndex } from '../constants.gen.js';
Expand Down Expand Up @@ -46,6 +46,14 @@ export function computeAddress(publicKeysHash: Fr, partialAddress: Fr) {
return AztecAddress.fromField(addressFr);
}

export function computeAddressFromPreaddressAndIvpkM(preaddress: Fr, ivpkM: Point) {
const curve = new Grumpkin();
const preaddressPoint = derivePublicKeyFromSecretKey(new Fq(preaddress.toBigInt()));
const addressPoint = curve.add(preaddressPoint, ivpkM);

return AztecAddress.fromField(addressPoint.x);
}

export function derivePublicKeyFromSecretKey(secretKey: Fq) {
const curve = new Grumpkin();
return curve.mul(curve.generator(), secretKey);
Expand Down
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