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wallet-core: Add filter_map function
Resolves #2129
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,148 @@ | ||
| // This Source Code Form is subject to the terms of the Mozilla Public | ||
| // License, v. 2.0. If a copy of the MPL was not distributed with this | ||
| // file, You can obtain one at http://mozilla.org/MPL/2.0/. | ||
| // | ||
| // Copyright (c) DUSK NETWORK. All rights reserved. | ||
|
|
||
| use ff::Field; | ||
| use rand::rngs::StdRng; | ||
| use rand::SeedableRng; | ||
|
|
||
| use execution_core::{ | ||
| transfer::phoenix::{ | ||
| Note, PublicKey as PhoenixPublicKey, SecretKey as PhoenixSecretKey, | ||
| }, | ||
| JubJubScalar, | ||
| }; | ||
|
|
||
| use wallet_core::{ | ||
| keys::derive_multiple_phoenix_sk, map_owned, phoenix_balance, BalanceInfo, | ||
| }; | ||
|
|
||
| #[test] | ||
| fn test_map_owned() { | ||
| // Assuming this set of notes where the number used as suffix is the | ||
| // "owner": | ||
| // notes := [A1, B1, C2, D2, E1, F3] | ||
|
|
||
| let mut rng = StdRng::seed_from_u64(0xdab); | ||
| const SEED_1: [u8; 64] = [1; 64]; | ||
| const SEED_2: [u8; 64] = [2; 64]; | ||
|
|
||
| let owner_1_sks = derive_multiple_phoenix_sk(&SEED_1, 0..3); | ||
| let owner_1_pks = [ | ||
| PhoenixPublicKey::from(&owner_1_sks[0]), | ||
| PhoenixPublicKey::from(&owner_1_sks[1]), | ||
| PhoenixPublicKey::from(&owner_1_sks[2]), | ||
| ]; | ||
| let owner_2_sks = derive_multiple_phoenix_sk(&SEED_2, 0..2); | ||
| let owner_2_pks = [ | ||
| PhoenixPublicKey::from(&owner_2_sks[0]), | ||
| PhoenixPublicKey::from(&owner_2_sks[1]), | ||
| ]; | ||
| let owner_3_pk = | ||
| PhoenixPublicKey::from(&PhoenixSecretKey::random(&mut rng)); | ||
|
|
||
| let value = 42; | ||
| let notes = vec![ | ||
| gen_note(&mut rng, true, &owner_1_pks[0], value), // owner 1 | ||
| gen_note(&mut rng, true, &owner_1_pks[1], value), // owner 1 | ||
| gen_note(&mut rng, true, &owner_2_pks[0], value), // owner 2 | ||
| gen_note(&mut rng, true, &owner_2_pks[1], value), // owner 2 | ||
| gen_note(&mut rng, true, &owner_1_pks[2], value), // owner 1 | ||
| gen_note(&mut rng, true, &owner_3_pk, value), // owner 3 | ||
| ]; | ||
|
|
||
| // notes with idx 0, 1 and 4 are owned by owner_1 | ||
| let notes_by_1 = map_owned(&owner_1_sks, ¬es); | ||
| assert_eq!(notes_by_1.len(), 3); | ||
| let note = ¬es[0]; | ||
| let nullifier = note.gen_nullifier(&owner_1_sks[0]); | ||
| assert_eq!(¬es_by_1[&nullifier], note); | ||
| let note = ¬es[1]; | ||
| let nullifier = note.gen_nullifier(&owner_1_sks[1]); | ||
| assert_eq!(¬es_by_1[&nullifier], note); | ||
| let note = ¬es[4]; | ||
| let nullifier = note.gen_nullifier(&owner_1_sks[2]); | ||
| assert_eq!(¬es_by_1[&nullifier], note); | ||
|
|
||
| // notes with idx 2 and 3 are owned by owner_2 | ||
| let notes_by_2 = map_owned(&owner_2_sks, ¬es); | ||
| assert_eq!(notes_by_2.len(), 2); | ||
| let note = ¬es[2]; | ||
| let nullifier = note.gen_nullifier(&owner_2_sks[0]); | ||
| assert_eq!(¬es_by_2[&nullifier], note); | ||
| let note = ¬es[3]; | ||
| let nullifier = note.gen_nullifier(&owner_2_sks[1]); | ||
| assert_eq!(¬es_by_2[&nullifier], note); | ||
| } | ||
|
|
||
| #[test] | ||
| fn test_balance() { | ||
| let mut rng = StdRng::seed_from_u64(0xdab); | ||
|
|
||
| let owner_sk = PhoenixSecretKey::random(&mut rng); | ||
| let owner_pk = PhoenixPublicKey::from(&owner_sk); | ||
|
|
||
| let mut notes = Vec::new(); | ||
|
|
||
| // create the notes | ||
| for value in 0..=10 { | ||
| // we want to test with a mix of transparent and obfuscated notes so we | ||
| // make every 10th note transparent | ||
| let obfuscated_note = if value % 10 == 0 { false } else { true }; | ||
|
|
||
| notes.push(gen_note(&mut rng, obfuscated_note, &owner_pk, value)); | ||
|
|
||
| // also push some notes that are not owned | ||
| if value % 4 == 0 { | ||
| let not_owner_pk = | ||
| PhoenixPublicKey::from(&PhoenixSecretKey::random(&mut rng)); | ||
| notes.push(gen_note( | ||
| &mut rng, | ||
| obfuscated_note, | ||
| ¬_owner_pk, | ||
| value, | ||
| )); | ||
| } | ||
| } | ||
|
|
||
| // the sum of these notes should be 5 * 11 = 55 | ||
| // and the spendable notes are 7 + 8 + 9 + 10 = 34 | ||
| let expected_balance = BalanceInfo { | ||
| value: 55, | ||
| spendable: 34, | ||
| }; | ||
|
|
||
| assert_eq!( | ||
| phoenix_balance(&(&owner_sk).into(), notes), | ||
| expected_balance | ||
| ); | ||
| } | ||
|
|
||
| fn gen_note( | ||
| rng: &mut StdRng, | ||
| obfuscated_note: bool, | ||
| owner_pk: &PhoenixPublicKey, | ||
| value: u64, | ||
| ) -> Note { | ||
| let sender_pk = PhoenixPublicKey::from(&PhoenixSecretKey::random(rng)); | ||
|
|
||
| let value_blinder = JubJubScalar::random(&mut *rng); | ||
| let sender_blinder = [ | ||
| JubJubScalar::random(&mut *rng), | ||
| JubJubScalar::random(&mut *rng), | ||
| ]; | ||
| if obfuscated_note { | ||
| Note::obfuscated( | ||
| rng, | ||
| &sender_pk, | ||
| &owner_pk, | ||
| value, | ||
| value_blinder, | ||
| sender_blinder, | ||
| ) | ||
| } else { | ||
| Note::transparent(rng, &sender_pk, &owner_pk, value, sender_blinder) | ||
| } | ||
| } |