[taler-wallet-core] 01/02: taler-util: amount currency normalization

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dold pushed a commit to branch master
in repository wallet-core.

commit 2dc876d6d6e766eeeda4efdb2c4e1d0ac19fa524
Author: Florian Dold <florian@dold.me>
AuthorDate: Wed Dec 1 18:07:27 2021 +0100

    taler-util: amount currency normalization
---
 packages/taler-util/src/amounts.ts | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

diff --git a/packages/taler-util/src/amounts.ts 
b/packages/taler-util/src/amounts.ts
index 41fd14be..25b3a2c8 100644
--- a/packages/taler-util/src/amounts.ts
+++ b/packages/taler-util/src/amounts.ts
@@ -151,7 +151,7 @@ export class Amounts {
     }
     let fraction = first.fraction % amountFractionalBase;
     for (const x of rest) {
-      if (x.currency !== currency) {
+      if (x.currency.toUpperCase() !== currency.toUpperCase()) {
         throw Error(`Mismatched currency: ${x.currency} and ${currency}`);
       }
 
@@ -187,7 +187,7 @@ export class Amounts {
     let fraction = a.fraction;
 
     for (const b of rest) {
-      if (b.currency !== currency) {
+      if (b.currency.toUpperCase() !== a.currency.toUpperCase()) {
         throw Error(`Mismatched currency: ${b.currency} and ${currency}`);
       }
       if (fraction < b.fraction) {
@@ -299,7 +299,7 @@ export class Amounts {
       return undefined;
     }
     return {
-      currency: res[1],
+      currency: res[1].toUpperCase(),
       fraction: Math.round(amountFractionalBase * Number.parseFloat(tail)),
       value,
     };
@@ -403,11 +403,17 @@ export class Amounts {
    */
   static stringify(a: AmountLike): string {
     a = Amounts.jsonifyAmount(a);
-    const s = this.stringifyValue(a)
+    const s = this.stringifyValue(a);
 
     return `${a.currency}:${s}`;
   }
 
+  static isSameCurrency(a1: AmountLike, a2: AmountLike): boolean {
+    const x1 = this.jsonifyAmount(a1);
+    const x2 = this.jsonifyAmount(a2);
+    return x1.currency.toUpperCase() === x2.currency.toUpperCase();
+  }
+
   static stringifyValue(a: AmountJson, minFractional: number = 0): string {
     const av = a.value + Math.floor(a.fraction / amountFractionalBase);
     const af = a.fraction % amountFractionalBase;
@@ -424,6 +430,6 @@ export class Amounts {
         n = (n * 10) % amountFractionalBase;
       }
     }
-    return s
+    return s;
   }
 }

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