Merge branch 'master' into age-withdraw

1 files changed, 156 insertions, 0 deletions

diff --git a/packages/taler-wallet-core/src/util/coinSelection.test.ts b/packages/taler-wallet-core/src/util/coinSelection.test.ts
index b907eb160..2a322c4a9 100644
--- a/packages/taler-wallet-core/src/util/coinSelection.test.ts
+++ b/packages/taler-wallet-core/src/util/coinSelection.test.ts
@@ -17,9 +17,165 @@ import {
   AbsoluteTime,
   AgeRestriction,
   AmountJson,
+  AmountString,
   Amounts,
+  DenomKeyType,
   Duration,
   TransactionAmountMode,
 } from "@gnu-taler/taler-util";
 import test, { ExecutionContext } from "ava";
+import { AvailableDenom, testing_greedySelectPeer } from "./coinSelection.js"
 
+type Tester<T> = {
+  deep: {
+    equal(another: T): ReturnType<ExecutionContext["deepEqual"]>;
+    equals(another: T): ReturnType<ExecutionContext["deepEqual"]>;
+  }
+}
+
+function expect<T>(t: ExecutionContext, thing: T): Tester<T> {
+  return {
+    deep: {
+      equal: (another: T) => t.deepEqual(thing, another),
+      equals: (another: T) => t.deepEqual(thing, another),
+    },
+  };
+}
+
+const inTheDistantFuture = AbsoluteTime.toProtocolTimestamp(
+  AbsoluteTime.addDuration(AbsoluteTime.now(), Duration.fromSpec({ hours: 1 }))
+)
+const inThePast = AbsoluteTime.toProtocolTimestamp(
+  AbsoluteTime.subtractDuraction(AbsoluteTime.now(), Duration.fromSpec({ hours: 1 }))
+)
+
+test("should select the coin", (t) => {
+  const instructedAmount = Amounts.parseOrThrow("LOCAL:2")
+  const tally = {
+    amountAcc: Amounts.zeroOfCurrency(instructedAmount.currency),
+    depositFeesAcc: Amounts.zeroOfCurrency(instructedAmount.currency),
+    lastDepositFee: Amounts.zeroOfCurrency(instructedAmount.currency),
+  };
+  const coins = testing_greedySelectPeer(
+    createCandidates([{
+      amount: "LOCAL:10",
+      numAvailable: 5,
+      depositFee: "LOCAL:0.1",
+      fromExchange: "http://exchange.localhost/",
+    }]),
+    instructedAmount, 
+    tally
+  );
+
+  expect(t, coins).deep.equal({
+    "hash0;32;http://exchange.localhost/": {
+      exchangeBaseUrl: "http://exchange.localhost/",
+      denomPubHash: "hash0",
+      maxAge: 32,
+      contributions: [Amounts.parseOrThrow("LOCAL:2")],
+    }
+  });
+
+  expect(t, tally).deep.equal({
+    amountAcc: Amounts.parseOrThrow("LOCAL:2"),
+    depositFeesAcc: Amounts.parseOrThrow("LOCAL:0.1"),
+    lastDepositFee: Amounts.parseOrThrow("LOCAL:0.1"),
+  });
+
+});
+
+test("should select 3 coins", (t) => {
+  const instructedAmount = Amounts.parseOrThrow("LOCAL:20")
+  const tally = {
+    amountAcc: Amounts.zeroOfCurrency(instructedAmount.currency),
+    depositFeesAcc: Amounts.zeroOfCurrency(instructedAmount.currency),
+    lastDepositFee: Amounts.zeroOfCurrency(instructedAmount.currency),
+  };
+  const coins = testing_greedySelectPeer(
+    createCandidates([{
+      amount: "LOCAL:10",
+      numAvailable: 5,
+      depositFee: "LOCAL:0.1",
+      fromExchange: "http://exchange.localhost/",
+    }]),
+    instructedAmount, 
+    tally
+  );
+
+  expect(t, coins).deep.equal({
+    "hash0;32;http://exchange.localhost/": {
+      exchangeBaseUrl: "http://exchange.localhost/",
+      denomPubHash: "hash0",
+      maxAge: 32,
+      contributions: [
+        Amounts.parseOrThrow("LOCAL:9.9"),
+        Amounts.parseOrThrow("LOCAL:9.9"),
+        Amounts.parseOrThrow("LOCAL:0.2")
+      ],
+    }
+  });
+
+  expect(t, tally).deep.equal({
+    amountAcc: Amounts.parseOrThrow("LOCAL:20"),
+    depositFeesAcc: Amounts.parseOrThrow("LOCAL:0.3"),
+    lastDepositFee: Amounts.parseOrThrow("LOCAL:0.1"),
+  });
+
+});
+
+test("can't select since the instructed amount is too high", (t) => {
+  const instructedAmount = Amounts.parseOrThrow("LOCAL:60")
+  const tally = {
+    amountAcc: Amounts.zeroOfCurrency(instructedAmount.currency),
+    depositFeesAcc: Amounts.zeroOfCurrency(instructedAmount.currency),
+    lastDepositFee: Amounts.zeroOfCurrency(instructedAmount.currency),
+  };
+  const coins = testing_greedySelectPeer(
+    createCandidates([{
+      amount: "LOCAL:10",
+      numAvailable: 5,
+      depositFee: "LOCAL:0.1",
+      fromExchange: "http://exchange.localhost/",
+    }]),
+    instructedAmount, 
+    tally
+  );
+
+  expect(t, coins).deep.equal(undefined);
+
+  expect(t, tally).deep.equal({
+    amountAcc: Amounts.parseOrThrow("LOCAL:49.5"),
+    depositFeesAcc: Amounts.parseOrThrow("LOCAL:0.5"),
+    lastDepositFee: Amounts.parseOrThrow("LOCAL:0.1"),
+  });
+
+});
+
+
+
+
+function createCandidates(ar: {amount: AmountString, depositFee: AmountString, numAvailable: number, fromExchange: string}[]): AvailableDenom[] {
+  return ar.map((r,idx) => {
+    return {
+      "denomPub": {
+        "age_mask": 0,
+        "cipher": DenomKeyType.Rsa,
+        "rsa_public_key": "PPP"
+      },
+      "denomPubHash": `hash${idx}`,
+      "value": r.amount,
+      "feeDeposit": r.depositFee,
+      "feeRefresh": "LOCAL:0",
+      "feeRefund": "LOCAL:0",
+      "feeWithdraw": "LOCAL:0",
+      "stampExpireDeposit": inTheDistantFuture,
+      "stampExpireLegal": inTheDistantFuture,
+      "stampExpireWithdraw": inTheDistantFuture,
+      "stampStart": inThePast,
+      "exchangeBaseUrl": r.fromExchange,
+      "numAvailable": r.numAvailable,
+      "maxAge": 32,
+
+    }
+  })
+}