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[taler-wallet-core] branch master updated: missing file
From: |
gnunet |
Subject: |
[taler-wallet-core] branch master updated: missing file |
Date: |
Tue, 08 Sep 2020 17:00:12 +0200 |
This is an automated email from the git hooks/post-receive script.
dold pushed a commit to branch master
in repository wallet-core.
The following commit(s) were added to refs/heads/master by this push:
new f79d10ee missing file
f79d10ee is described below
commit f79d10eea291acba42dd27e5900d2128a1242daa
Author: Florian Dold <florian.dold@gmail.com>
AuthorDate: Tue Sep 8 20:30:03 2020 +0530
missing file
---
packages/taler-wallet-core/src/util/retries.ts | 92 ++++++++++++++++++++++++++
1 file changed, 92 insertions(+)
diff --git a/packages/taler-wallet-core/src/util/retries.ts
b/packages/taler-wallet-core/src/util/retries.ts
new file mode 100644
index 00000000..f3a5e7d8
--- /dev/null
+++ b/packages/taler-wallet-core/src/util/retries.ts
@@ -0,0 +1,92 @@
+/*
+ This file is part of GNU Taler
+ (C) 2020 Taler Systems S.A.
+
+ GNU Taler is free software; you can redistribute it and/or modify it under the
+ terms of the GNU General Public License as published by the Free Software
+ Foundation; either version 3, or (at your option) any later version.
+
+ GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along with
+ GNU Taler; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
+ */
+
+/**
+ * Helpers for dealing with retry timeouts.
+ */
+
+/**
+ * Imports.
+ */
+import { Timestamp, Duration, getTimestampNow } from "./time";
+
+export interface RetryInfo {
+ firstTry: Timestamp;
+ nextRetry: Timestamp;
+ retryCounter: number;
+ active: boolean;
+}
+
+export interface RetryPolicy {
+ readonly backoffDelta: Duration;
+ readonly backoffBase: number;
+}
+
+const defaultRetryPolicy: RetryPolicy = {
+ backoffBase: 1.5,
+ backoffDelta: { d_ms: 200 },
+};
+
+export function updateRetryInfoTimeout(
+ r: RetryInfo,
+ p: RetryPolicy = defaultRetryPolicy,
+): void {
+ const now = getTimestampNow();
+ if (now.t_ms === "never") {
+ throw Error("assertion failed");
+ }
+ if (p.backoffDelta.d_ms === "forever") {
+ r.nextRetry = { t_ms: "never" };
+ return;
+ }
+ r.active = true;
+ const t =
+ now.t_ms + p.backoffDelta.d_ms * Math.pow(p.backoffBase, r.retryCounter);
+ r.nextRetry = { t_ms: t };
+}
+
+export function getRetryDuration(
+ r: RetryInfo,
+ p: RetryPolicy = defaultRetryPolicy,
+): Duration {
+ if (p.backoffDelta.d_ms === "forever") {
+ return { d_ms: "forever" };
+ }
+ const t = p.backoffDelta.d_ms * Math.pow(p.backoffBase, r.retryCounter);
+ return { d_ms: t };
+}
+
+export function initRetryInfo(
+ active = true,
+ p: RetryPolicy = defaultRetryPolicy,
+): RetryInfo {
+ if (!active) {
+ return {
+ active: false,
+ firstTry: { t_ms: Number.MAX_SAFE_INTEGER },
+ nextRetry: { t_ms: Number.MAX_SAFE_INTEGER },
+ retryCounter: 0,
+ };
+ }
+ const info = {
+ firstTry: getTimestampNow(),
+ active: true,
+ nextRetry: { t_ms: 0 },
+ retryCounter: 0,
+ };
+ updateRetryInfoTimeout(info, p);
+ return info;
+}
\ No newline at end of file
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