address protocol changes in the exchange

The exchange now has a wad fee and truncates the payto hash in signatures

3 files changed, 15 insertions, 2 deletions

diff --git a/packages/taler-util/src/backupTypes.ts b/packages/taler-util/src/backupTypes.ts
index 8663850c9..41a9ce98e 100644
--- a/packages/taler-util/src/backupTypes.ts
+++ b/packages/taler-util/src/backupTypes.ts
@@ -1023,6 +1023,8 @@ export interface BackupExchangeWireFee {
    */
   wire_fee: string;
 
+  wad_fee: string;
+
   /**
    * Fees to close and refund a reserve.
    */
diff --git a/packages/taler-util/src/talerCrypto.ts b/packages/taler-util/src/talerCrypto.ts
index 83e5dc6fe..358da9dac 100644
--- a/packages/taler-util/src/talerCrypto.ts
+++ b/packages/taler-util/src/talerCrypto.ts
@@ -25,6 +25,7 @@ import * as nacl from "./nacl-fast.js";
 import { kdf, kdfKw } from "./kdf.js";
 import bigint from "big-integer";
 import {
+  Base32String,
   CoinEnvelope,
   DenominationPubKey,
   DenomKeyType,
@@ -598,6 +599,15 @@ export function hash(d: Uint8Array): Uint8Array {
   return nacl.hash(d);
 }
 
+/**
+ * Hash the input with SHA-512 and truncate the result
+ * to 32 bytes.
+ */
+export function hashTruncate32(d: Uint8Array): Uint8Array {
+  const sha512HashCode = nacl.hash(d);
+  return sha512HashCode.subarray(0, 32);
+}
+
 export function hashCoinEv(
   coinEv: CoinEnvelope,
   denomPubHash: HashCodeString,
@@ -608,7 +618,6 @@ export function hashCoinEv(
   return hashContext.finish();
 }
 
-
 const logger = new Logger("talerCrypto.ts");
 
 export function hashCoinEvInner(
@@ -683,7 +692,6 @@ export interface FreshCoin {
   bks: Uint8Array;
 }
 
-
 function bufferForUint32(n: number): Uint8Array {
   const arrBuf = new ArrayBuffer(4);
   const buf = new Uint8Array(arrBuf);
diff --git a/packages/taler-util/src/talerTypes.ts b/packages/taler-util/src/talerTypes.ts
index 59d37dece..4581f0b6a 100644
--- a/packages/taler-util/src/talerTypes.ts
+++ b/packages/taler-util/src/talerTypes.ts
@@ -738,6 +738,8 @@ export class WireFeesJson {
    */
   wire_fee: string;
 
+  wad_fee: string;
+
   /**
    * Cost of clising a reserve.
    */
@@ -1356,6 +1358,7 @@ export const codecForWireFeesJson = (): Codec<WireFeesJson> =>
   buildCodecForObject<WireFeesJson>()
     .property("wire_fee", codecForString())
     .property("closing_fee", codecForString())
+    .property("wad_fee", codecForString())
     .property("sig", codecForString())
     .property("start_date", codecForTimestamp)
     .property("end_date", codecForTimestamp)