From 02f1d4b08116c24f0af1f32cb6d82be292fa6d10 Mon Sep 17 00:00:00 2001
From: Florian Dold <florian@dold.me>
Date: Wed, 2 Jun 2021 13:23:51 +0200
Subject: support multiple exchange details per base URL

---
 packages/taler-wallet-core/src/db.ts | 135 +++++++++++++++++++----------------
 1 file changed, 72 insertions(+), 63 deletions(-)

(limited to 'packages/taler-wallet-core/src/db.ts')

diff --git a/packages/taler-wallet-core/src/db.ts b/packages/taler-wallet-core/src/db.ts
index 0ff34d3c7..c457d0ffc 100644
--- a/packages/taler-wallet-core/src/db.ts
+++ b/packages/taler-wallet-core/src/db.ts
@@ -513,26 +513,43 @@ export interface DenominationRecord {
   exchangeBaseUrl: string;
 }
 
-/**
- * Details about the exchange that we only know after
- * querying /keys and /wire.
- */
-export interface ExchangeDetails {
+export enum ExchangeUpdateStatus {
+  FetchKeys = "fetch-keys",
+  FetchWire = "fetch-wire",
+  FetchTerms = "fetch-terms",
+  FinalizeUpdate = "finalize-update",
+  Finished = "finished",
+}
+
+export interface ExchangeBankAccount {
+  payto_uri: string;
+  master_sig: string;
+}
+
+export enum ExchangeUpdateReason {
+  Initial = "initial",
+  Forced = "forced",
+  Scheduled = "scheduled",
+}
+
+export interface ExchangeDetailsRecord {
   /**
    * Master public key of the exchange.
    */
   masterPublicKey: string;
 
-  /**
-   * Auditors (partially) auditing the exchange.
-   */
-  auditors: Auditor[];
+  exchangeBaseUrl: string;
 
   /**
    * Currency that the exchange offers.
    */
   currency: string;
 
+  /**
+   * Auditors (partially) auditing the exchange.
+   */
+  auditors: Auditor[];
+
   /**
    * Last observed protocol version.
    */
@@ -546,6 +563,23 @@ export interface ExchangeDetails {
    */
   signingKeys: ExchangeSignKeyJson[];
 
+  /**
+   * Terms of service text or undefined if not downloaded yet.
+   *
+   * This is just used as a cache of the last downloaded ToS.
+   */
+  termsOfServiceText: string | undefined;
+
+  /**
+   * ETag for last terms of service download.
+   */
+  termsOfServiceLastEtag: string | undefined;
+
+  /**
+   * ETag for last terms of service download.
+   */
+  termsOfServiceAcceptedEtag: string | undefined;
+
   /**
    * Timestamp for last update.
    */
@@ -555,30 +589,25 @@ export interface ExchangeDetails {
    * When should we next update the information about the exchange?
    */
   nextUpdateTime: Timestamp;
-}
 
-export enum ExchangeUpdateStatus {
-  FetchKeys = "fetch-keys",
-  FetchWire = "fetch-wire",
-  FetchTerms = "fetch-terms",
-  FinalizeUpdate = "finalize-update",
-  Finished = "finished",
+  wireInfo: WireInfo;
 }
 
-export interface ExchangeBankAccount {
-  payto_uri: string;
-  master_sig: string;
-}
-
-export interface ExchangeWireInfo {
+export interface WireInfo {
   feesForType: { [wireMethod: string]: WireFee[] };
+
   accounts: ExchangeBankAccount[];
 }
 
-export enum ExchangeUpdateReason {
-  Initial = "initial",
-  Forced = "forced",
-  Scheduled = "scheduled",
+export interface ExchangeDetailsPointer {
+  masterPublicKey: string;
+  currency: string;
+
+  /**
+   * Timestamp when the (masterPublicKey, currency) pointer
+   * has been updated.
+   */
+  updateClock: Timestamp;
 }
 
 /**
@@ -590,48 +619,13 @@ export interface ExchangeRecord {
    */
   baseUrl: string;
 
-  /**
-   * Did we finish adding the exchange?
-   */
-  addComplete: boolean;
+  detailsPointer: ExchangeDetailsPointer | undefined;
 
   /**
    * Is this a permanent or temporary exchange record?
    */
   permanent: boolean;
 
-  /**
-   * Was the exchange added as a built-in exchange?
-   */
-  builtIn: boolean;
-
-  /**
-   * Details, once known.
-   */
-  details: ExchangeDetails | undefined;
-
-  /**
-   * Mapping from wire method type to the wire fee.
-   */
-  wireInfo: ExchangeWireInfo | undefined;
-
-  /**
-   * Terms of service text or undefined if not downloaded yet.
-   *
-   * This is just used as a cache of the last downloaded ToS.
-   */
-  termsOfServiceText: string | undefined;
-
-  /**
-   * ETag for last terms of service download.
-   */
-  termsOfServiceLastEtag: string | undefined;
-
-  /**
-   * ETag for last terms of service download.
-   */
-  termsOfServiceAcceptedEtag: string | undefined;
-
   /**
    * Time when the update to the exchange has been started or
    * undefined if no update is in progress.
@@ -640,6 +634,9 @@ export interface ExchangeRecord {
 
   /**
    * Status of updating the info about the exchange.
+   * 
+   * FIXME:  Adapt this to recent changes regarding how
+   * updating exchange details works.
    */
   updateStatus: ExchangeUpdateStatus;
 
@@ -1548,7 +1545,7 @@ export interface BackupProviderTerms {
 export interface BackupProviderRecord {
   /**
    * Base URL of the provider.
-   * 
+   *
    * Primary key for the record.
    */
   baseUrl: string;
@@ -1692,6 +1689,17 @@ class ExchangesStore extends Store<"exchanges", ExchangeRecord> {
   }
 }
 
+class ExchangeDetailsStore extends Store<
+  "exchangeDetails",
+  ExchangeDetailsRecord
+> {
+  constructor() {
+    super("exchangeDetails", {
+      keyPath: ["exchangeBaseUrl", "currency", "masterPublicKey"],
+    });
+  }
+}
+
 class CoinsStore extends Store<"coins", CoinRecord> {
   constructor() {
     super("coins", { keyPath: "coinPub" });
@@ -1924,6 +1932,7 @@ export const Stores = {
   exchangeTrustStore: new ExchangeTrustStore(),
   denominations: new DenominationsStore(),
   exchanges: new ExchangesStore(),
+  exchangeDetails: new ExchangeDetailsStore(),
   proposals: new ProposalsStore(),
   refreshGroups: new Store<"refreshGroups", RefreshGroupRecord>(
     "refreshGroups",
-- 
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