wallet-core: return currency specification from exchange

1 files changed, 66 insertions, 45 deletions

diff --git a/packages/taler-wallet-core/src/wallet.ts b/packages/taler-wallet-core/src/wallet.ts
index 4e5fdab71..b6167be12 100644
--- a/packages/taler-wallet-core/src/wallet.ts
+++ b/packages/taler-wallet-core/src/wallet.ts
@@ -38,6 +38,7 @@ import {
   DenominationInfo,
   Duration,
   ExchangesShortListResponse,
+  GetCurrencySpecificationRequest,
   GetCurrencySpecificationResponse,
   InitResponse,
   KnownBankAccounts,
@@ -191,6 +192,7 @@ import {
   CoinSourceType,
   ConfigRecordKey,
   DenominationRecord,
+  WalletDbHelpers,
   WalletDbReadOnlyTransaction,
   WalletStoresV1,
   clearDatabase,
@@ -758,7 +760,7 @@ async function dispatchRequestInternal(
         await fillDefaults(wex);
       }
       const resp: InitResponse = {
-        versionInfo: getVersion(wex),
+        versionInfo: handleGetVersion(wex),
       };
 
       if (req.config?.lazyTaskLoop) {
@@ -777,7 +779,7 @@ async function dispatchRequestInternal(
         exchangeBaseUrl: "https://exchange.test.taler.net/",
       });
       return {
-        versionInfo: getVersion(wex),
+        versionInfo: handleGetVersion(wex),
       };
     }
     case WalletApiOperation.WithdrawTestBalance: {
@@ -1197,48 +1199,8 @@ async function dispatchRequestInternal(
       return {};
     }
     case WalletApiOperation.GetCurrencySpecification: {
-      // Ignore result, just validate in this mock implementation
       const req = codecForGetCurrencyInfoRequest().decode(payload);
-      // Hard-coded mock for KUDOS and TESTKUDOS
-      if (req.scope.currency === "KUDOS") {
-        const kudosResp: GetCurrencySpecificationResponse = {
-          currencySpecification: {
-            name: "Kudos (Taler Demonstrator)",
-            num_fractional_input_digits: 2,
-            num_fractional_normal_digits: 2,
-            num_fractional_trailing_zero_digits: 2,
-            alt_unit_names: {
-              "0": "ク",
-            },
-          },
-        };
-        return kudosResp;
-      } else if (req.scope.currency === "TESTKUDOS") {
-        const testkudosResp: GetCurrencySpecificationResponse = {
-          currencySpecification: {
-            name: "Test (Taler Unstable Demonstrator)",
-            num_fractional_input_digits: 0,
-            num_fractional_normal_digits: 0,
-            num_fractional_trailing_zero_digits: 0,
-            alt_unit_names: {
-              "0": "テ",
-            },
-          },
-        };
-        return testkudosResp;
-      }
-      const defaultResp: GetCurrencySpecificationResponse = {
-        currencySpecification: {
-          name: req.scope.currency,
-          num_fractional_input_digits: 2,
-          num_fractional_normal_digits: 2,
-          num_fractional_trailing_zero_digits: 2,
-          alt_unit_names: {
-            "0": req.scope.currency,
-          },
-        },
-      };
-      return defaultResp;
+      return handleGetCurrencySpecification(wex, req);
     }
     case WalletApiOperation.ImportBackupRecovery: {
       const req = codecForAny().decode(payload);
@@ -1554,7 +1516,7 @@ async function dispatchRequestInternal(
       return {};
     }
     case WalletApiOperation.GetVersion: {
-      return getVersion(wex);
+      return handleGetVersion(wex);
     }
     case WalletApiOperation.TestingWaitTransactionsFinal:
       return await waitUntilAllTransactionsFinal(wex);
@@ -1626,7 +1588,66 @@ async function dispatchRequestInternal(
   );
 }
 
-export function getVersion(wex: WalletExecutionContext): WalletCoreVersion {
+export async function handleGetCurrencySpecification(
+  wex: WalletExecutionContext,
+  req: GetCurrencySpecificationRequest,
+): Promise<GetCurrencySpecificationResponse> {
+  const spec = await wex.db.runReadOnlyTx(
+    {
+      storeNames: ["currencyInfo"],
+    },
+    async (tx) => {
+      return WalletDbHelpers.getCurrencyInfo(tx, req.scope);
+    },
+  );
+  if (spec) {
+    return {
+      currencySpecification: spec.currencySpec,
+    };
+  }
+  // Hard-coded mock for KUDOS and TESTKUDOS
+  if (req.scope.currency === "KUDOS") {
+    const kudosResp: GetCurrencySpecificationResponse = {
+      currencySpecification: {
+        name: "Kudos (Taler Demonstrator)",
+        num_fractional_input_digits: 2,
+        num_fractional_normal_digits: 2,
+        num_fractional_trailing_zero_digits: 2,
+        alt_unit_names: {
+          "0": "ク",
+        },
+      },
+    };
+    return kudosResp;
+  } else if (req.scope.currency === "TESTKUDOS") {
+    const testkudosResp: GetCurrencySpecificationResponse = {
+      currencySpecification: {
+        name: "Test (Taler Unstable Demonstrator)",
+        num_fractional_input_digits: 0,
+        num_fractional_normal_digits: 0,
+        num_fractional_trailing_zero_digits: 0,
+        alt_unit_names: {
+          "0": "テ",
+        },
+      },
+    };
+    return testkudosResp;
+  }
+  const defaultResp: GetCurrencySpecificationResponse = {
+    currencySpecification: {
+      name: req.scope.currency,
+      num_fractional_input_digits: 2,
+      num_fractional_normal_digits: 2,
+      num_fractional_trailing_zero_digits: 2,
+      alt_unit_names: {
+        "0": req.scope.currency,
+      },
+    },
+  };
+  return defaultResp;
+}
+
+function handleGetVersion(wex: WalletExecutionContext): WalletCoreVersion {
   const result: WalletCoreVersion = {
     implementationSemver: walletCoreBuildInfo.implementationSemver,
     implementationGitHash: walletCoreBuildInfo.implementationGitHash,