diff --git a/packages/taler-wallet-core/src/operations/backup.ts b/packages/taler-wallet-core/src/operations/backup.ts
index 72fdf7aa1..0c856b7bc 100644
--- a/packages/taler-wallet-core/src/operations/backup.ts
+++ b/packages/taler-wallet-core/src/operations/backup.ts
@@ -246,7 +246,7 @@ export async function exportBackup(
             count: x.count,
             denom_pub_hash: x.denomPubHash,
           })),
-          timestamp_start: wg.timestampStart,
+          timestamp_created: wg.timestampStart,
           timestamp_finish: wg.timestampFinish,
           withdrawal_group_id: wg.withdrawalGroupId,
           secret_seed: wg.secretSeed,
@@ -267,6 +267,8 @@ export async function exportBackup(
           timestamp_created: reserve.timestampCreated,
           withdrawal_groups:
             withdrawalGroupsByReserve[reserve.reservePub] ?? [],
+          // FIXME!
+          timestamp_last_activity: reserve.timestampCreated,
         };
         const backupReserves = (backupReservesByExchange[
           reserve.exchangeBaseUrl
@@ -285,7 +287,7 @@ export async function exportBackup(
             count: x.count,
             denom_pub_hash: x.denomPubHash,
           })),
-          timestam_picked_up: tip.pickedUpTimestamp,
+          timestamp_finished: tip.pickedUpTimestamp,
           timestamp_accepted: tip.acceptedTimestamp,
           timestamp_created: tip.createdTimestamp,
           timestamp_expiration: tip.tipExpiration,
@@ -296,8 +298,8 @@ export async function exportBackup(
       await tx.iter(Stores.recoupGroups).forEach((recoupGroup) => {
         backupRecoupGroups.push({
           recoup_group_id: recoupGroup.recoupGroupId,
-          timestamp_started: recoupGroup.timestampStarted,
-          timestamp_finished: recoupGroup.timestampFinished,
+          timestamp_created: recoupGroup.timestampStarted,
+          timestamp_finish: recoupGroup.timestampFinished,
           coins: recoupGroup.coinPubs.map((x, i) => ({
             coin_pub: x,
             recoup_finished: recoupGroup.recoupFinishedPerCoin[i],
@@ -414,6 +416,7 @@ export async function exportBackup(
 
         backupExchanges.push({
           base_url: ex.baseUrl,
+          reserve_closing_delay: ex.details.reserveClosingDelay,
           accounts: ex.wireInfo.accounts.map((x) => ({
             payto_uri: x.payto_uri,
             master_sig: x.master_sig,
@@ -472,7 +475,6 @@ export async function exportBackup(
         }
 
         backupPurchases.push({
-          clock_created: 1,
           contract_terms_raw: purch.download.contractTermsRaw,
           auto_refund_deadline: purch.autoRefundDeadline,
           merchant_pay_sig: purch.merchantPaySig,
@@ -486,7 +488,6 @@ export async function exportBackup(
           refunds,
           timestamp_accept: purch.timestampAccept,
           timestamp_first_successful_pay: purch.timestampFirstSuccessfulPay,
-          timestamp_last_refund_status: purch.timestampLastRefundStatus,
           abort_status:
             purch.abortStatus === AbortStatus.None
               ? undefined
@@ -564,8 +565,8 @@ export async function exportBackup(
         backupRefreshGroups.push({
           reason: rg.reason as any,
           refresh_group_id: rg.refreshGroupId,
-          timestamp_started: rg.timestampCreated,
-          timestamp_finished: rg.timestampFinished,
+          timestamp_created: rg.timestampCreated,
+          timestamp_finish: rg.timestampFinished,
           old_coins: oldCoins,
         });
       });
@@ -592,6 +593,7 @@ export async function exportBackup(
         trusted_auditors: {},
         trusted_exchanges: {},
         intern_table: {},
+        error_reports: [],
       };
 
       // If the backup changed, we increment our clock.
@@ -934,6 +936,7 @@ export async function importBackup(
             wireInfo,
             details: {
               currency: backupExchange.currency,
+              reserveClosingDelay: backupExchange.reserve_closing_delay,
               auditors: backupExchange.auditors.map((x) => ({
                 auditor_pub: x.auditor_pub,
                 auditor_url: x.auditor_url,
@@ -1102,7 +1105,7 @@ export async function importBackup(
                 reservePub,
                 retryInfo: initRetryInfo(false),
                 secretSeed: backupWg.secret_seed,
-                timestampStart: backupWg.timestamp_start,
+                timestampStart: backupWg.timestamp_created,
                 timestampFinish: backupWg.timestamp_finish,
                 withdrawalGroupId: backupWg.withdrawal_group_id,
               });
@@ -1336,7 +1339,7 @@ export async function importBackup(
             timestampFirstSuccessfulPay:
               backupPurchase.timestamp_first_successful_pay,
             timestampLastRefundStatus:
-              backupPurchase.timestamp_last_refund_status,
+              undefined,
             merchantPaySig: backupPurchase.merchant_pay_sig,
             lastSessionId: undefined,
             abortStatus,
@@ -1414,8 +1417,8 @@ export async function importBackup(
             }
           }
           await tx.put(Stores.refreshGroups, {
-            timestampFinished: backupRefreshGroup.timestamp_finished,
-            timestampCreated: backupRefreshGroup.timestamp_started,
+            timestampFinished: backupRefreshGroup.timestamp_finish,
+            timestampCreated: backupRefreshGroup.timestamp_created,
             refreshGroupId: backupRefreshGroup.refresh_group_id,
             reason,
             lastError: undefined,
@@ -1452,7 +1455,7 @@ export async function importBackup(
             lastError: undefined,
             merchantBaseUrl: backupTip.exchange_base_url,
             merchantTipId: backupTip.merchant_tip_id,
-            pickedUpTimestamp: backupTip.timestam_picked_up,
+            pickedUpTimestamp: backupTip.timestamp_finished,
             retryInfo: initRetryInfo(false),
             secretSeed: backupTip.secret_seed,
             tipAmountEffective: denomsSel.totalCoinValue,
diff --git a/packages/taler-wallet-core/src/operations/exchanges.ts b/packages/taler-wallet-core/src/operations/exchanges.ts
index 3e71634cd..52da6be62 100644
--- a/packages/taler-wallet-core/src/operations/exchanges.ts
+++ b/packages/taler-wallet-core/src/operations/exchanges.ts
@@ -212,6 +212,7 @@ async function updateExchangeWithKeys(
         nextUpdateTime: getExpiryTimestamp(resp, {
           minDuration: durationFromSpec({ hours: 1 }),
         }),
+        reserveClosingDelay: exchangeKeysJson.reserve_closing_delay,
       };
       r.updateStatus = ExchangeUpdateStatus.FetchWire;
       r.lastError = undefined;
diff --git a/packages/taler-wallet-core/src/types/backupTypes.ts b/packages/taler-wallet-core/src/types/backupTypes.ts
index 56b50d71c..5570902e6 100644
--- a/packages/taler-wallet-core/src/types/backupTypes.ts
+++ b/packages/taler-wallet-core/src/types/backupTypes.ts
@@ -20,24 +20,13 @@
  * Contains some redundancy with the other type declarations,
  * as the backup schema must remain very stable and should be self-contained.
  *
- * Current limitations:
- * 1. "Ghost spends", where a coin is spent unexpectedly by another wallet
- *    and a corresponding transaction (that is missing some details!) should
- *    be added to the transaction history, aren't implemented yet.
- * 2. Clocks for denom/coin selections aren't properly modeled yet.
- *    (Needed for re-denomination of withdrawal / re-selection of coins)
- * 3. Preferences about how currencies are to be displayed
- *    aren't exported yet (and not even implemented in wallet-core).
- * 4. Returning money to own bank account isn't supported/exported yet.
- * 5. Peer-to-peer payments aren't supported yet.
- * 6. Next update time / next auto-refresh time isn't backed up yet.
- * 7. Coin/denom selections should be forgettable once that information
- *    becomes irrelevant.
- * 8. Re-denominated payments/refreshes are not shown properly in the total
- *    payment cost.
- * 9. Permanently failed operations aren't properly modeled yet
- * 10. Do we somehow need to model the mechanism for first only withdrawing
- *     the amount to pay the backup provider?
+ * Future:
+ * 1. Ghost spends (coin unexpectedly spend by a wallet with shared data)
+ * 2. Ghost withdrawals (reserve unexpectedly emptied by another wallet with shared data)
+ * 3. Track losses through re-denomination of payments/refreshes
+ * 4. (Feature:) Payments to own bank account and P2P-payments need to be backed up
+ * 5. Track last/next update time, so on restore we need to do less work
+ * 6. Currency render preferences?
  *
  * Questions:
  * 1. What happens when two backups are merged that have
@@ -64,7 +53,7 @@
 /**
  * Imports.
  */
-import { Timestamp } from "../util/time";
+import { Duration, Timestamp } from "../util/time";
 
 /**
  * Type alias for strings that are to be treated like amounts.
@@ -82,9 +71,12 @@ type BackupAmountString = string;
 type DeviceIdString = string;
 
 /**
- * Integer-valued clock.
+ * Lamport clock timestamp.
  */
-type ClockValue = number;
+export interface ClockStamp {
+  deviceId: string;
+  value: number;
+}
 
 /**
  * Contract terms JSON.
@@ -131,7 +123,7 @@ export interface WalletBackupContentV1 {
    * tombstones in the hopefully rare case that multiple wallets
    * are connected to the same sync server.
    */
-  clocks: { [device_id: string]: ClockValue };
+  clocks: { [device_id: string]: number };
 
   /**
    * Timestamp of the backup.
@@ -227,6 +219,22 @@ export interface WalletBackupContentV1 {
    * addresses, etc.) might be shared among many contract terms.
    */
   intern_table: { [hash: string]: any };
+
+  /**
+   * Permanent error reports.
+   */
+  error_reports: BackupErrorReport[];
+}
+
+/**
+ * Detailed error report.
+ *
+ * For auditor-relevant reports with attached cryptographic proof,
+ * the error report also should contain the submission status to
+ * the auditor(s).
+ */
+interface BackupErrorReport {
+  // FIXME: specify!
 }
 
 /**
@@ -253,12 +261,12 @@ export interface BackupTrustAuditor {
    * Can be undefined if this entry represents a removal delta
    * from the wallet's defaults.
    */
-  clock_added?: ClockValue;
+  clock_added?: ClockStamp;
 
   /**
    * Clock for when the auditor trust has been removed.
    */
-  clock_removed?: ClockValue;
+  clock_removed?: ClockStamp;
 }
 
 /**
@@ -286,12 +294,12 @@ export interface BackupTrustExchange {
    * Can be undefined if this entry represents a removal delta
    * from the wallet's defaults.
    */
-  clock_added?: ClockValue;
+  clock_added?: ClockStamp;
 
   /**
    * Clock for when the exchange trust has been removed.
    */
-  clock_removed?: ClockValue;
+  clock_removed?: ClockStamp;
 }
 
 export class BackupBackupProviderTerms {
@@ -347,15 +355,11 @@ export interface BackupRecoupGroup {
   /**
    * Timestamp when the recoup was started.
    */
-  timestamp_started: Timestamp;
+  timestamp_created: Timestamp;
 
-  /**
-   * Timestamp when the recoup finished.
-   *
-   * (That means all coins have been recouped and coins to
-   * be refreshed have been put in a refresh group.)
-   */
-  timestamp_finished: Timestamp | undefined;
+  timestamp_finish?: Timestamp;
+  finish_clock?: Timestamp;
+  finish_is_failure?: boolean;
 
   /**
    * Information about each coin being recouped.
@@ -475,10 +479,15 @@ export interface BackupCoin {
   /**
    * Does the wallet think that the coin is still fresh?
    *
-   * FIXME:  If we always refresh when importing a backup, do
-   * we even need this flag?
+   * Note that even if a fresh coin is imported, it should still
+   * be refreshed in most situations.
    */
   fresh: boolean;
+
+  /**
+   * Clock for the last update to current_amount/fresh.
+   */
+  last_clock?: ClockStamp;
 }
 
 /**
@@ -511,11 +520,15 @@ export interface BackupTip {
    */
   timestamp_created: Timestamp;
 
-  /**
-   * Timestamp for when the wallet finished picking up the tip
-   * from the merchant.
-   */
-  timestam_picked_up: Timestamp | undefined;
+  timestamp_finished?: Timestamp;
+  finish_clock?: ClockStamp;
+  finish_is_failure?: boolean;
+
+  finish_info?: {
+    timestamp: Timestamp;
+    clock: ClockStamp;
+    failure: boolean;
+  };
 
   /**
    * The tipped amount.
@@ -540,10 +553,9 @@ export interface BackupTip {
   /**
    * Selected denominations.  Determines the effective tip amount.
    */
-  selected_denoms: {
-    denom_pub_hash: string;
-    count: number;
-  }[];
+  selected_denoms: BackupDenomSel;
+
+  selected_denoms_clock?: ClockStamp;
 }
 
 /**
@@ -631,12 +643,11 @@ export interface BackupRefreshGroup {
    */
   old_coins: BackupRefreshOldCoin[];
 
-  timestamp_started: Timestamp;
+  timestamp_created: Timestamp;
 
-  /**
-   * Timestamp when the refresh group finished.
-   */
-  timestamp_finished: Timestamp | undefined;
+  timestamp_finish?: Timestamp;
+  finish_clock?: ClockStamp;
+  finish_is_failure?: boolean;
 }
 
 /**
@@ -656,12 +667,11 @@ export interface BackupWithdrawalGroup {
    * When was the withdrawal operation started started?
    * Timestamp in milliseconds.
    */
-  timestamp_start: Timestamp;
+  timestamp_created: Timestamp;
 
-  /**
-   * When was the withdrawal operation completed?
-   */
   timestamp_finish?: Timestamp;
+  finish_clock?: ClockStamp;
+  finish_is_failure?: boolean;
 
   /**
    * Amount including fees (i.e. the amount subtracted from the
@@ -677,6 +687,8 @@ export interface BackupWithdrawalGroup {
    * Multiset of denominations selected for withdrawal.
    */
   selected_denoms: BackupDenomSel;
+
+  selected_denoms_clock?: ClockStamp;
 }
 
 export enum BackupRefundState {
@@ -725,6 +737,8 @@ export interface BackupRefundItemCommon {
    * accurately.
    */
   total_refresh_cost_bound: BackupAmountString;
+
+  last_clock?: ClockStamp;
 }
 
 /**
@@ -758,11 +772,6 @@ export interface BackupPurchase {
    */
   proposal_id: string;
 
-  /**
-   * Clock when this purchase was created.
-   */
-  clock_created: number;
-
   /**
    * Contract terms we got from the merchant.
    */
@@ -791,6 +800,11 @@ export interface BackupPurchase {
     contribution: BackupAmountString;
   }[];
 
+  /**
+   * Clock when the pay coin selection was made/updated.
+   */
+  pay_coins_clock?: ClockStamp;
+
   /**
    * Total cost initially shown to the user.
    *
@@ -828,10 +842,15 @@ export interface BackupPurchase {
   refunds: BackupRefundItem[];
 
   /**
-   * When was the last refund made?
-   * Set to 0 if no refund was made on the purchase.
+   * Is the purchase considered defunct (either during payment
+   * or during abort if abort_status is set).
    */
-  timestamp_last_refund_status: Timestamp | undefined;
+  defunct?: boolean;
+
+  /**
+   * Clock for last update to defunct status.
+   */
+  defunct_clock?: ClockStamp;
 
   /**
    * Abort status of the payment.
@@ -945,6 +964,21 @@ export interface BackupReserve {
    */
   timestamp_created: Timestamp;
 
+  /**
+   * Timestamp of the last observed activity.
+   *
+   * Used to compute when to give up querying the exchange.
+   */
+  timestamp_last_activity: Timestamp;
+
+  /**
+   * Timestamp of when the reserve closed.
+   *
+   * Note that the last activity can be after the closing time
+   * due to recouping.
+   */
+  timestamp_closed?: Timestamp;
+
   /**
    * Wire information (as payto URI) for the bank account that
    * transfered funds for this reserve.
@@ -1012,6 +1046,9 @@ export interface BackupReserve {
    * Groups of withdrawal operations for this reserve.  Typically just one.
    */
   withdrawal_groups: BackupWithdrawalGroup[];
+
+  defective?: boolean;
+  defective_clock?: ClockStamp;
 }
 
 /**
@@ -1134,6 +1171,11 @@ export interface BackupExchange {
    */
   protocol_version: string;
 
+  /**
+   * Closing delay of reserves.
+   */
+  reserve_closing_delay: Duration;
+
   /**
    * Signing keys we got from the exchange, can also contain
    * older signing keys that are not returned by /keys anymore.
@@ -1159,6 +1201,18 @@ export interface BackupExchange {
    * ETag for last terms of service download.
    */
   tos_etag_accepted: string | undefined;
+
+  /**
+   * Clock value of the last update.
+   */
+  last_clock?: ClockStamp;
+
+  /**
+   * Should this exchange be considered defective?
+   */
+  defective?: boolean;
+
+  defective_clock?: ClockStamp;
 }
 
 export enum BackupProposalStatus {
@@ -1236,6 +1290,8 @@ export interface BackupProposal {
    */
   proposal_status: BackupProposalStatus;
 
+  proposal_status_clock?: ClockStamp;
+
   /**
    * Proposal that this one got "redirected" to as part of
    * the repurchase detection.
diff --git a/packages/taler-wallet-core/src/types/dbTypes.ts b/packages/taler-wallet-core/src/types/dbTypes.ts
index 551495a68..62ad01d25 100644
--- a/packages/taler-wallet-core/src/types/dbTypes.ts
+++ b/packages/taler-wallet-core/src/types/dbTypes.ts
@@ -392,6 +392,8 @@ export interface ExchangeDetails {
    */
   protocolVersion: string;
 
+  reserveClosingDelay: Duration;
+
   /**
    * Signing keys we got from the exchange, can also contain
    * older signing keys that are not returned by /keys anymore.
diff --git a/packages/taler-wallet-core/src/types/talerTypes.ts b/packages/taler-wallet-core/src/types/talerTypes.ts
index fe30fa8b9..b17c101b0 100644
--- a/packages/taler-wallet-core/src/types/talerTypes.ts
+++ b/packages/taler-wallet-core/src/types/talerTypes.ts
@@ -672,6 +672,8 @@ export class ExchangeKeysJson {
    * Protocol version.
    */
   version: string;
+
+  reserve_closing_delay: Duration;
 }
 
 /**
@@ -1193,6 +1195,7 @@ export const codecForExchangeKeysJson = (): Codec<ExchangeKeysJson> =>
     .property("recoup", codecOptional(codecForList(codecForRecoup())))
     .property("signkeys", codecForList(codecForExchangeSigningKey()))
     .property("version", codecForString())
+    .property("reserve_closing_delay", codecForDuration)
     .build("KeysJson");
 
 export const codecForWireFeesJson = (): Codec<WireFeesJson> =>