store exchange public key with signature on denomination

packages/taler-wallet-core/src/db.ts

@@ -513,6 +513,12 @@ export interface DenominationRecord {
    * Base URL of the exchange.
    */
   exchangeBaseUrl: string;
+
+  /**
+   * Master public key of the exchange that made the signature
+   * on the denomination.
+   */
+  exchangeMasterPub: string;
 }
 
 export interface ExchangeBankAccount {

packages/taler-wallet-core/src/operations/backup/import.ts

@@ -337,6 +337,7 @@ export async function importBackup(
               denomPub: backupDenomination.denom_pub,
               denomPubHash: denomPubHash,
               exchangeBaseUrl: backupExchangeDetails.base_url,
+              exchangeMasterPub: backupExchangeDetails.master_public_key,
               feeDeposit: Amounts.parseOrThrow(backupDenomination.fee_deposit),
               feeRefresh: Amounts.parseOrThrow(backupDenomination.fee_refresh),
               feeRefund: Amounts.parseOrThrow(backupDenomination.fee_refund),

packages/taler-wallet-core/src/operations/exchanges.ts

@@ -77,6 +77,7 @@ const logger = new Logger("exchanges.ts");
 
 function denominationRecordFromKeys(
   exchangeBaseUrl: string,
+  exchangeMasterPub: string,
   denomIn: Denomination,
 ): DenominationRecord {
   const denomPubHash = encodeCrock(hash(decodeCrock(denomIn.denom_pub)));
@@ -84,6 +85,7 @@ function denominationRecordFromKeys(
     denomPub: denomIn.denom_pub,
     denomPubHash,
     exchangeBaseUrl,
+    exchangeMasterPub,
     feeDeposit: Amounts.parseOrThrow(denomIn.fee_deposit),
     feeRefresh: Amounts.parseOrThrow(denomIn.fee_refresh),
     feeRefund: Amounts.parseOrThrow(denomIn.fee_refund),
@@ -378,7 +380,11 @@ async function downloadKeysInfo(
     currency,
     auditors: exchangeKeysJson.auditors,
     currentDenominations: exchangeKeysJson.denoms.map((d) =>
-      denominationRecordFromKeys(baseUrl, d),
+      denominationRecordFromKeys(
+        baseUrl,
+        exchangeKeysJson.master_public_key,
+        d,
+      ),
     ),
     protocolVersion: exchangeKeysJson.version,
     signingKeys: exchangeKeysJson.signkeys,
@@ -410,10 +416,12 @@ async function updateExchangeFromUrlImpl(
   const r = await provideExchangeRecord(ws, baseUrl, now);
 
   if (!forceNow && r && !isTimestampExpired(r.nextUpdate)) {
-    const res = await ws.db.mktx((x) => ({
+    const res = await ws.db
+      .mktx((x) => ({
         exchanges: x.exchanges,
         exchangeDetails: x.exchangeDetails,
-    })).runReadOnly(async (tx) => {
+      }))
+      .runReadOnly(async (tx) => {
         const exchange = await tx.exchanges.get(baseUrl);
         if (!exchange) {
           return;
@@ -493,9 +501,9 @@ async function updateExchangeFromUrlImpl(
       r.lastError = undefined;
       r.retryInfo = initRetryInfo(false);
       r.lastUpdate = getTimestampNow();
-      r.nextUpdate = keysInfo.expiry,
+      (r.nextUpdate = keysInfo.expiry),
         // New denominations might be available.
-      r.nextRefreshCheck = getTimestampNow();
+        (r.nextRefreshCheck = getTimestampNow());
       r.detailsPointer = {
         currency: details.currency,
         masterPublicKey: details.masterPublicKey,

packages/taler-wallet-core/src/operations/withdraw.test.ts

@@ -33,6 +33,7 @@ test("withdrawal selection bug repro", (t) => {
       denomPubHash:
         "Q21FQSSG4FXNT96Z14CHXM8N1RZAG9GPHAV8PRWS0PZAAVWH7PBW6R97M2CH19KKP65NNSWXY7B6S53PT3CBM342E357ZXDDJ8RDVW8",
       exchangeBaseUrl: "https://exchange.demo.taler.net/",
+      exchangeMasterPub: "",
       feeDeposit: {
         currency: "KUDOS",
         fraction: 1000000,
@@ -82,6 +83,7 @@ test("withdrawal selection bug repro", (t) => {
       denomPubHash:
         "447WA23SCBATMABHA0793F92MYTBYVPYMMQHCPKMKVY5P7RZRFMQ6VRW0Y8HRA7177GTBT0TBT08R21DZD129AJ995H9G09XBFE55G8",
       exchangeBaseUrl: "https://exchange.demo.taler.net/",
+      exchangeMasterPub: "",
       feeDeposit: {
         currency: "KUDOS",
         fraction: 1000000,
@@ -131,6 +133,7 @@ test("withdrawal selection bug repro", (t) => {
       denomPubHash:
         "JS61DTKAFM0BX8Q4XV3ZSKB921SM8QK745Z2AFXTKFMBHHFNBD8TQ5ETJHFNDGBGX22FFN2A2ERNYG1SGSDQWNQHQQ2B14DBVJYJG8R",
       exchangeBaseUrl: "https://exchange.demo.taler.net/",
+      exchangeMasterPub: "",
       feeDeposit: {
         currency: "KUDOS",
         fraction: 1000000,
@@ -180,6 +183,7 @@ test("withdrawal selection bug repro", (t) => {
       denomPubHash:
         "8T51NEY81VMPQ180EQ5WR0YH7GMNNT90W55Q0514KZM18AZT71FHJGJHQXGK0WTA7ACN1X2SD0S53XPBQ1A9KH960R48VCVVM6E3TH8",
       exchangeBaseUrl: "https://exchange.demo.taler.net/",
+      exchangeMasterPub: "",
       feeDeposit: {
         currency: "KUDOS",
         fraction: 1000000,
@@ -229,6 +233,7 @@ test("withdrawal selection bug repro", (t) => {
       denomPubHash:
         "A41HW0Q2H9PCNMEWW0C0N45QAYVXZ8SBVRRAHE4W6X24SV1TH38ANTWDT80JXEBW9Z8PVPGT9GFV2EYZWJ5JW5W1N34NFNKHQSZ1PFR",
       exchangeBaseUrl: "https://exchange.demo.taler.net/",
+      exchangeMasterPub: "",
       feeDeposit: {
         currency: "KUDOS",
         fraction: 1000000,
@@ -278,6 +283,7 @@ test("withdrawal selection bug repro", (t) => {
       denomPubHash:
         "F5NGBX33DTV4595XZZVK0S2MA1VMXFEJQERE5EBP5DS4QQ9EFRANN7YHWC1TKSHT2K6CQWDBRES8D3DWR0KZF5RET40B4AZXZ0RW1ZG",
       exchangeBaseUrl: "https://exchange.demo.taler.net/",
+      exchangeMasterPub: "",
       feeDeposit: {
         currency: "KUDOS",
         fraction: 1000000,