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-rw-r--r--packages/taler-wallet-core/src/util/coinSelection.test.ts322
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diff --git a/packages/taler-wallet-core/src/util/coinSelection.test.ts b/packages/taler-wallet-core/src/util/coinSelection.test.ts
deleted file mode 100644
index fe9672116..000000000
--- a/packages/taler-wallet-core/src/util/coinSelection.test.ts
+++ /dev/null
@@ -1,322 +0,0 @@
-/*
- This file is part of GNU Taler
- (C) 2021 Taler Systems S.A.
-
- GNU Taler is free software; you can redistribute it and/or modify it under the
- terms of the GNU General Public License as published by the Free Software
- Foundation; either version 3, or (at your option) any later version.
-
- GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
- WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
- A PARTICULAR PURPOSE. See the GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License along with
- GNU Taler; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
- */
-
-/**
- * Imports.
- */
-import test from "ava";
-import {
- AgeRestriction,
- AmountJson,
- Amounts,
- DenomKeyType,
-} from "@gnu-taler/taler-util";
-import { AvailableCoinInfo, selectPayCoinsLegacy } from "./coinSelection.js";
-
-function a(x: string): AmountJson {
- const amt = Amounts.parse(x);
- if (!amt) {
- throw Error("invalid amount");
- }
- return amt;
-}
-
-function fakeAci(current: string, feeDeposit: string): AvailableCoinInfo {
- return {
- value: a(current),
- availableAmount: a(current),
- coinPub: "foobar",
- denomPub: {
- cipher: DenomKeyType.Rsa,
- rsa_public_key: "foobar",
- age_mask: 0,
- },
- feeDeposit: a(feeDeposit),
- exchangeBaseUrl: "https://example.com/",
- maxAge: AgeRestriction.AGE_UNRESTRICTED,
- };
-}
-
-function fakeAciWithAgeRestriction(
- current: string,
- feeDeposit: string,
-): AvailableCoinInfo {
- return {
- value: a(current),
- availableAmount: a(current),
- coinPub: "foobar",
- denomPub: {
- cipher: DenomKeyType.Rsa,
- rsa_public_key: "foobar",
- age_mask: 2446657,
- },
- feeDeposit: a(feeDeposit),
- exchangeBaseUrl: "https://example.com/",
- maxAge: AgeRestriction.AGE_UNRESTRICTED,
- };
-}
-
-test("it should be able to pay if merchant takes the fees", (t) => {
- const acis: AvailableCoinInfo[] = [
- fakeAci("EUR:1.0", "EUR:0.1"),
- fakeAci("EUR:1.0", "EUR:0.0"),
- ];
- acis.forEach((x, i) => (x.coinPub = String(i)));
-
- const res = selectPayCoinsLegacy({
- candidates: {
- candidateCoins: acis,
- wireFeesPerExchange: {},
- },
- contractTermsAmount: a("EUR:2.0"),
- depositFeeLimit: a("EUR:0.1"),
- wireFeeLimit: a("EUR:0"),
- wireFeeAmortization: 1,
- });
-
- if (!res) {
- t.fail();
- return;
- }
- t.deepEqual(res.coinPubs, ["1", "0"]);
- t.pass();
-});
-
-test("it should take the last two coins if it pays less fees", (t) => {
- const acis: AvailableCoinInfo[] = [
- fakeAci("EUR:1.0", "EUR:0.5"),
- fakeAci("EUR:1.0", "EUR:0.0"),
- // Merchant covers the fee, this one shouldn't be used
- fakeAci("EUR:1.0", "EUR:0.0"),
- ];
- acis.forEach((x, i) => (x.coinPub = String(i)));
-
- const res = selectPayCoinsLegacy({
- candidates: {
- candidateCoins: acis,
- wireFeesPerExchange: {},
- },
- contractTermsAmount: a("EUR:2.0"),
- depositFeeLimit: a("EUR:0.5"),
- wireFeeLimit: a("EUR:0"),
- wireFeeAmortization: 1,
- });
-
- if (!res) {
- t.fail();
- return;
- }
- t.deepEqual(res.coinPubs, ["1", "2"]);
- t.pass();
-});
-
-test("it should take the last coins if the merchant doest not take all the fee", (t) => {
- const acis: AvailableCoinInfo[] = [
- fakeAci("EUR:1.0", "EUR:0.5"),
- fakeAci("EUR:1.0", "EUR:0.5"),
- // this coin should be selected instead of previous one with fee
- fakeAci("EUR:1.0", "EUR:0.0"),
- ];
- acis.forEach((x, i) => (x.coinPub = String(i)));
-
- const res = selectPayCoinsLegacy({
- candidates: {
- candidateCoins: acis,
- wireFeesPerExchange: {},
- },
- contractTermsAmount: a("EUR:2.0"),
- depositFeeLimit: a("EUR:0.5"),
- wireFeeLimit: a("EUR:0"),
- wireFeeAmortization: 1,
- });
-
- if (!res) {
- t.fail();
- return;
- }
- t.deepEqual(res.coinPubs, ["2", "0"]);
- t.pass();
-});
-
-test("it should use 3 coins to cover fees and payment", (t) => {
- const acis: AvailableCoinInfo[] = [
- fakeAci("EUR:1.0", "EUR:0.5"), //contributed value 1 (fee by the merchant)
- fakeAci("EUR:1.0", "EUR:0.5"), //contributed value .5
- fakeAci("EUR:1.0", "EUR:0.5"), //contributed value .5
- ];
-
- const res = selectPayCoinsLegacy({
- candidates: {
- candidateCoins: acis,
- wireFeesPerExchange: {},
- },
- contractTermsAmount: a("EUR:2.0"),
- depositFeeLimit: a("EUR:0.5"),
- wireFeeLimit: a("EUR:0"),
- wireFeeAmortization: 1,
- });
-
- if (!res) {
- t.fail();
- return;
- }
- t.true(res.coinPubs.length === 3);
- t.pass();
-});
-
-test("it should return undefined if there is not enough coins", (t) => {
- const acis: AvailableCoinInfo[] = [
- fakeAci("EUR:1.0", "EUR:0.5"),
- fakeAci("EUR:1.0", "EUR:0.5"),
- fakeAci("EUR:1.0", "EUR:0.5"),
- ];
-
- const res = selectPayCoinsLegacy({
- candidates: {
- candidateCoins: acis,
- wireFeesPerExchange: {},
- },
- contractTermsAmount: a("EUR:4.0"),
- depositFeeLimit: a("EUR:0.2"),
- wireFeeLimit: a("EUR:0"),
- wireFeeAmortization: 1,
- });
-
- t.true(!res);
- t.pass();
-});
-
-test("it should return undefined if there is not enough coins (taking into account fees)", (t) => {
- const acis: AvailableCoinInfo[] = [
- fakeAci("EUR:1.0", "EUR:0.5"),
- fakeAci("EUR:1.0", "EUR:0.5"),
- ];
- const res = selectPayCoinsLegacy({
- candidates: {
- candidateCoins: acis,
- wireFeesPerExchange: {},
- },
- contractTermsAmount: a("EUR:2.0"),
- depositFeeLimit: a("EUR:0.2"),
- wireFeeLimit: a("EUR:0"),
- wireFeeAmortization: 1,
- });
- t.true(!res);
- t.pass();
-});
-
-test("it should not count into customer fee if merchant can afford it", (t) => {
- const acis: AvailableCoinInfo[] = [
- fakeAci("EUR:1.0", "EUR:0.1"),
- fakeAci("EUR:1.0", "EUR:0.1"),
- ];
- const res = selectPayCoinsLegacy({
- candidates: {
- candidateCoins: acis,
- wireFeesPerExchange: {},
- },
- contractTermsAmount: a("EUR:2.0"),
- depositFeeLimit: a("EUR:0.2"),
- wireFeeLimit: a("EUR:0"),
- wireFeeAmortization: 1,
- });
- t.truthy(res);
- t.true(Amounts.cmp(res!.customerDepositFees, "EUR:0.0") === 0);
- t.true(
- Amounts.cmp(Amounts.sum(res!.coinContributions).amount, "EUR:2.0") === 0,
- );
- t.pass();
-});
-
-test("it should use the coins that spent less relative fee", (t) => {
- const acis: AvailableCoinInfo[] = [
- fakeAci("EUR:1.0", "EUR:0.2"),
- fakeAci("EUR:0.1", "EUR:0.2"),
- fakeAci("EUR:0.05", "EUR:0.05"),
- fakeAci("EUR:0.05", "EUR:0.05"),
- ];
- acis.forEach((x, i) => (x.coinPub = String(i)));
-
- const res = selectPayCoinsLegacy({
- candidates: {
- candidateCoins: acis,
- wireFeesPerExchange: {},
- },
- contractTermsAmount: a("EUR:1.1"),
- depositFeeLimit: a("EUR:0.4"),
- wireFeeLimit: a("EUR:0"),
- wireFeeAmortization: 1,
- });
- if (!res) {
- t.fail();
- return;
- }
- t.deepEqual(res.coinPubs, ["0", "2", "3"]);
- t.pass();
-});
-
-test("coin selection 9", (t) => {
- const acis: AvailableCoinInfo[] = [
- fakeAci("EUR:1.0", "EUR:0.2"),
- fakeAci("EUR:0.2", "EUR:0.2"),
- ];
- const res = selectPayCoinsLegacy({
- candidates: {
- candidateCoins: acis,
- wireFeesPerExchange: {},
- },
- contractTermsAmount: a("EUR:1.2"),
- depositFeeLimit: a("EUR:0.4"),
- wireFeeLimit: a("EUR:0"),
- wireFeeAmortization: 1,
- });
- if (!res) {
- t.fail();
- return;
- }
- t.true(res.coinContributions.length === 2);
- t.true(
- Amounts.cmp(Amounts.sum(res.coinContributions).amount, "EUR:1.2") === 0,
- );
- t.pass();
-});
-
-test("it should be able to use unrestricted coins for age restricted contract", (t) => {
- const acis: AvailableCoinInfo[] = [
- fakeAciWithAgeRestriction("EUR:1.0", "EUR:0.2"),
- fakeAciWithAgeRestriction("EUR:0.2", "EUR:0.2"),
- ];
- const res = selectPayCoinsLegacy({
- candidates: {
- candidateCoins: acis,
- wireFeesPerExchange: {},
- },
- contractTermsAmount: a("EUR:1.2"),
- depositFeeLimit: a("EUR:0.4"),
- wireFeeLimit: a("EUR:0"),
- wireFeeAmortization: 1,
- requiredMinimumAge: 13,
- });
- if (!res) {
- t.fail();
- return;
- }
- t.true(res.coinContributions.length === 2);
- t.true(
- Amounts.cmp(Amounts.sum(res.coinContributions).amount, "EUR:1.2") === 0,
- );
- t.pass();
-});
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