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<ol class="chapter"><li class="chapter-item expanded affix "><a href="../../index.html">Introduction</a></li><li class="chapter-item expanded "><a href="../../vac/index.html"><strong aria-hidden="true">1.</strong> Vac</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../vac/1/coss.html"><strong aria-hidden="true">1.1.</strong> 1/COSS</a></li><li class="chapter-item expanded "><a href="../../vac/2/mvds.html"><strong aria-hidden="true">1.2.</strong> 2/MVDS</a></li><li class="chapter-item expanded "><a href="../../vac/3/remote-log.html"><strong aria-hidden="true">1.3.</strong> 3/Remote Log</a></li><li class="chapter-item expanded "><a href="../../vac/4/mvds-meta.html"><strong aria-hidden="true">1.4.</strong> 4/MVDS Meta</a></li><li class="chapter-item expanded "><a href="../../vac/25/libp2p-dns-discovery.html"><strong aria-hidden="true">1.5.</strong> 25/Libp2p DNS Discovery</a></li><li class="chapter-item expanded "><a href="../../vac/32/rln-v1.html"><strong aria-hidden="true">1.6.</strong> 32/RLN-V1</a></li><li class="chapter-item expanded "><a href="../../vac/raw/index.html"><strong aria-hidden="true">1.7.</strong> Raw</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../vac/raw/consensus-hashgraphlike.html"><strong aria-hidden="true">1.7.1.</strong> Consensus Hashgraphlike</a></li><li class="chapter-item expanded "><a href="../../vac/raw/decentralized-messaging-ethereum.html"><strong aria-hidden="true">1.7.2.</strong> Decentralized Messaging Ethereum</a></li><li class="chapter-item expanded "><a href="../../vac/raw/eth-mls-offchain.html"><strong aria-hidden="true">1.7.3.</strong> ETH MLS Offchain</a></li><li class="chapter-item expanded "><a href="../../vac/raw/eth-mls-onchain.html"><strong aria-hidden="true">1.7.4.</strong> ETH MLS Onchain</a></li><li class="chapter-item expanded "><a href="../../vac/raw/deleted/eth-secpm.html"><strong aria-hidden="true">1.7.5.</strong> ETH SecPM</a></li><li class="chapter-item expanded "><a href="../../vac/raw/gossipsub-tor-push.html"><strong aria-hidden="true">1.7.6.</strong> Gossipsub Tor Push</a></li><li class="chapter-item expanded "><a href="../../vac/raw/logos-capability-discovery.html"><strong aria-hidden="true">1.7.7.</strong> Logos Capability Discovery</a></li><li class="chapter-item expanded "><a href="../../vac/raw/mix.html"><strong aria-hidden="true">1.7.8.</strong> Mix</a></li><li class="chapter-item expanded "><a href="../../vac/raw/noise-x3dh-double-ratchet.html"><strong aria-hidden="true">1.7.9.</strong> Noise X3DH Double Ratchet</a></li><li class="chapter-item expanded "><a href="../../vac/raw/rln-interep-spec.html"><strong aria-hidden="true">1.7.10.</strong> RLN Interep Spec</a></li><li class="chapter-item expanded "><a href="../../vac/raw/rln-stealth-commitments.html"><strong aria-hidden="true">1.7.11.</strong> RLN Stealth Commitments</a></li><li class="chapter-item expanded "><a href="../../vac/raw/rln-v2.html"><strong aria-hidden="true">1.7.12.</strong> RLN-V2</a></li><li class="chapter-item expanded "><a href="../../vac/raw/sds.html"><strong aria-hidden="true">1.7.13.</strong> SDS</a></li></ol></li><li class="chapter-item expanded "><a href="../../vac/template.html"><strong aria-hidden="true">1.8.</strong> Template</a></li></ol></li><li class="chapter-item expanded "><a href="../../waku/index.html"><strong aria-hidden="true">2.</strong> Waku</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../waku/standards/core/index.html"><strong aria-hidden="true">2.1.</strong> Standards - Core</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../waku/standards/core/10/waku2.html"><strong aria-hidden="true">2.1.1.</strong> 10/Waku2</a></li><li class="chapter-item expanded "><a href="../../waku/standards/core/11/relay.html"><strong aria-hidden="true">2.1.2.</strong> 11/Relay</a></li><li class="chapter-item expanded "><a href="../../waku/standards/core/12/filter.html"><strong aria-hidden="true">2.1.3.</strong> 12/Filter</a></li><li class="chapter-item expanded "><a href="../../waku/standards/core/13/store.html"><strong aria-hidden="true">2.1.4.</strong> 13/Store</a></li><li class="chapter-item expanded "><a href="../../waku/standards/core/14/message.html"><strong aria-hidden="true">2.1.5.</strong> 14/Message</a></li><li class="chapter-item expanded "><a href="../../waku/standards/core/15/bridge.html"><strong aria-hidden="true">2.1.6.</strong> 15/Bridge</a></li><li class="chapter-item expanded "><a href="../../waku/standards/core/17/rln-relay.html"><strong aria-hidden="true">2.1.7.</strong> 17/RLN Relay</a></li><li class="chapter-item expanded "><a href="../../waku/standards/core/19/lightpush.html"><strong aria-hidden="true">2.1.8.</strong> 19/Lightpush</a></li><li class="chapter-item expanded "><a href="../../waku/standards/core/31/enr.html"><strong aria-hidden="true">2.1.9.</strong> 31/ENR</a></li><li class="chapter-item expanded "><a href="../../waku/standards/core/33/discv5.html"><strong aria-hidden="true">2.1.10.</strong> 33/Discv5</a></li><li class="chapter-item expanded "><a href="../../waku/standards/core/34/peer-exchange.html"><strong aria-hidden="true">2.1.11.</strong> 34/Peer Exchange</a></li><li class="chapter-item expanded "><a href="../../waku/standards/core/36/bindings-api.html"><strong aria-hidden="true">2.1.12.</strong> 36/Bindings API</a></li><li class="chapter-item expanded "><a href="../../waku/standards/core/64/network.html"><strong aria-hidden="true">2.1.13.</strong> 64/Network</a></li><li class="chapter-item expanded "><a href="../../waku/standards/core/66/metadata.html"><strong aria-hidden="true">2.1.14.</strong> 66/Metadata</a></li></ol></li><li class="chapter-item expanded "><a href="../../waku/standards/application/index.html"><strong aria-hidden="true">2.2.</strong> Standards - Application</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../waku/standards/application/20/toy-eth-pm.html"><strong aria-hidden="true">2.2.1.</strong> 20/Toy ETH PM</a></li><li class="chapter-item expanded "><a href="../../waku/standards/application/26/payload.html"><strong aria-hidden="true">2.2.2.</strong> 26/Payload</a></li><li class="chapter-item expanded "><a href="../../waku/standards/application/53/x3dh.html"><strong aria-hidden="true">2.2.3.</strong> 53/X3DH</a></li><li class="chapter-item expanded "><a href="../../waku/standards/application/54/x3dh-sessions.html"><strong aria-hidden="true">2.2.4.</strong> 54/X3DH Sessions</a></li></ol></li><li class="chapter-item expanded "><a href="../../waku/standards/legacy/index.html"><strong aria-hidden="true">2.3.</strong> Standards - Legacy</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../waku/standards/legacy/6/waku1.html"><strong aria-hidden="true">2.3.1.</strong> 6/Waku1</a></li><li class="chapter-item expanded "><a href="../../waku/standards/legacy/7/data.html"><strong aria-hidden="true">2.3.2.</strong> 7/Data</a></li><li class="chapter-item expanded "><a href="../../waku/standards/legacy/8/mail.html"><strong aria-hidden="true">2.3.3.</strong> 8/Mail</a></li><li class="chapter-item expanded "><a href="../../waku/standards/legacy/9/rpc.html"><strong aria-hidden="true">2.3.4.</strong> 9/RPC</a></li></ol></li><li class="chapter-item expanded "><a href="../../waku/informational/index.html"><strong aria-hidden="true">2.4.</strong> Informational</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../waku/informational/22/toy-chat.html"><strong aria-hidden="true">2.4.1.</strong> 22/Toy Chat</a></li><li class="chapter-item expanded "><a href="../../waku/informational/23/topics.html"><strong aria-hidden="true">2.4.2.</strong> 23/Topics</a></li><li class="chapter-item expanded "><a href="../../waku/informational/27/peers.html"><strong aria-hidden="true">2.4.3.</strong> 27/Peers</a></li><li class="chapter-item expanded "><a href="../../waku/informational/29/config.html"><strong aria-hidden="true">2.4.4.</strong> 29/Config</a></li><li class="chapter-item expanded "><a href="../../waku/informational/30/adaptive-nodes.html"><strong aria-hidden="true">2.4.5.</strong> 30/Adaptive Nodes</a></li></ol></li><li class="chapter-item expanded "><a href="../../waku/deprecated/index.html"><strong aria-hidden="true">2.5.</strong> Deprecated</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../waku/deprecated/5/waku0.html"><strong aria-hidden="true">2.5.1.</strong> 5/Waku0</a></li><li class="chapter-item expanded "><a href="../../waku/deprecated/16/rpc.html"><strong aria-hidden="true">2.5.2.</strong> 16/RPC</a></li><li class="chapter-item expanded "><a href="../../waku/deprecated/18/swap.html"><strong aria-hidden="true">2.5.3.</strong> 18/Swap</a></li><li class="chapter-item expanded "><a href="../../waku/deprecated/fault-tolerant-store.html" class="active"><strong aria-hidden="true">2.5.4.</strong> Fault Tolerant Store</a></li></ol></li></ol></li><li class="chapter-item expanded "><a href="../../nomos/index.html"><strong aria-hidden="true">3.</strong> Nomos</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../nomos/raw/index.html"><strong aria-hidden="true">3.1.</strong> Raw</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../nomos/raw/nomosda-encoding.html"><strong aria-hidden="true">3.1.1.</strong> NomosDA Encoding</a></li><li class="chapter-item expanded "><a href="../../nomos/raw/nomosda-network.html"><strong aria-hidden="true">3.1.2.</strong> NomosDA Network</a></li><li class="chapter-item expanded "><a href="../../nomos/raw/p2p-hardware-requirements.html"><strong aria-hidden="true">3.1.3.</strong> P2P Hardware Requirements</a></li><li class="chapter-item expanded "><a href="../../nomos/raw/p2p-nat-solution.html"><strong aria-hidden="true">3.1.4.</strong> P2P NAT Solution</a></li><li class="chapter-item expanded "><a href="../../nomos/raw/p2p-network-bootstrapping.html"><strong aria-hidden="true">3.1.5.</strong> P2P Network Bootstrapping</a></li><li class="chapter-item expanded "><a href="../../nomos/raw/p2p-network.html"><strong aria-hidden="true">3.1.6.</strong> P2P Network</a></li><li class="chapter-item expanded "><a href="../../nomos/raw/sdp.html"><strong aria-hidden="true">3.1.7.</strong> SDP</a></li></ol></li><li class="chapter-item expanded "><a href="../../nomos/deprecated/index.html"><strong aria-hidden="true">3.2.</strong> Deprecated</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../nomos/deprecated/claro.html"><strong aria-hidden="true">3.2.1.</strong> Claro</a></li></ol></li></ol></li><li class="chapter-item expanded "><a href="../../codex/index.html"><strong aria-hidden="true">4.</strong> Codex</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../codex/raw/index.html"><strong aria-hidden="true">4.1.</strong> Raw</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../codex/raw/codex-block-exchange.html"><strong aria-hidden="true">4.1.1.</strong> Block Exchange</a></li><li class="chapter-item expanded "><a href="../../codex/raw/codex-marketplace.html"><strong aria-hidden="true">4.1.2.</strong> Marketplace</a></li></ol></li></ol></li><li class="chapter-item expanded "><a href="../../status/index.html"><strong aria-hidden="true">5.</strong> Status</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../status/24/curation.html"><strong aria-hidden="true">5.1.</strong> 24/Curation</a></li><li class="chapter-item expanded "><a href="../../status/28/featuring.html"><strong aria-hidden="true">5.2.</strong> 28/Featuring</a></li><li class="chapter-item expanded "><a href="../../status/55/1to1-chat.html"><strong aria-hidden="true">5.3.</strong> 55/1-to-1 Chat</a></li><li class="chapter-item expanded "><a href="../../status/56/communities.html"><strong aria-hidden="true">5.4.</strong> 56/Communities</a></li><li class="chapter-item expanded "><a href="../../status/61/community-history-service.html"><strong aria-hidden="true">5.5.</strong> 61/Community History Service</a></li><li class="chapter-item expanded "><a href="../../status/62/payloads.html"><strong aria-hidden="true">5.6.</strong> 62/Payloads</a></li><li class="chapter-item expanded "><a href="../../status/63/keycard-usage.html"><strong aria-hidden="true">5.7.</strong> 63/Keycard Usage</a></li><li class="chapter-item expanded "><a href="../../status/65/account-address.html"><strong aria-hidden="true">5.8.</strong> 65/Account Address</a></li><li class="chapter-item expanded "><a href="../../status/71/push-notification-server.html"><strong aria-hidden="true">5.9.</strong> 71/Push Notification Server</a></li><li class="chapter-item expanded "><a href="../../status/raw/index.html"><strong aria-hidden="true">5.10.</strong> Raw</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../status/raw/simple-scaling.html"><strong aria-hidden="true">5.10.1.</strong> Simple Scaling</a></li><li class="chapter-item expanded "><a href="../../status/raw/status-app-protocols.html"><strong aria-hidden="true">5.10.2.</strong> Status App Protocols</a></li><li class="chapter-item expanded "><a href="../../status/raw/status-mvds.html"><strong aria-hidden="true">5.10.3.</strong> Status MVDS</a></li><li class="chapter-item expanded "><a href="../../status/raw/url-data.html"><strong aria-hidden="true">5.10.4.</strong> URL Data</a></li><li class="chapter-item expanded "><a href="../../status/raw/url-scheme.html"><strong aria-hidden="true">5.10.5.</strong> URL Scheme</a></li></ol></li><li class="chapter-item expanded "><a href="../../status/deprecated/index.html"><strong aria-hidden="true">5.11.</strong> Deprecated</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../status/deprecated/3rd-party.html"><strong aria-hidden="true">5.11.1.</strong> 3rd Party</a></li><li class="chapter-item expanded "><a href="../../status/deprecated/account.html"><strong aria-hidden="true">5.11.2.</strong> Account</a></li><li class="chapter-item expanded "><a href="../../status/deprecated/client.html"><strong aria-hidden="true">5.11.3.</strong> Client</a></li><li class="chapter-item expanded "><a href="../../status/deprecated/dapp-browser-API-usage.html"><strong aria-hidden="true">5.11.4.</strong> Dapp Browser API Usage</a></li><li class="chapter-item expanded "><a href="../../status/deprecated/eips.html"><strong aria-hidden="true">5.11.5.</strong> EIPs</a></li><li class="chapter-item expanded "><a href="../../status/deprecated/ethereum-usage.html"><strong aria-hidden="true">5.11.6.</strong> Ethereum Usage</a></li><li class="chapter-item expanded "><a href="../../status/deprecated/group-chat.html"><strong aria-hidden="true">5.11.7.</strong> Group Chat</a></li><li class="chapter-item expanded "><a href="../../status/deprecated/IPFS-gateway-for-sticker-Pack.html"><strong aria-hidden="true">5.11.8.</strong> IPFS Gateway for Sticker Pack</a></li><li class="chapter-item expanded "><a href="../../status/deprecated/keycard-usage-for-wallet-and-chat-keys.html"><strong aria-hidden="true">5.11.9.</strong> Keycard Usage for Wallet and Chat Keys</a></li><li class="chapter-item expanded "><a href="../../status/deprecated/notifications.html"><strong aria-hidden="true">5.11.10.</strong> Notifications</a></li><li class="chapter-item expanded "><a href="../../status/deprecated/payloads.html"><strong aria-hidden="true">5.11.11.</strong> Payloads</a></li><li class="chapter-item expanded "><a href="../../status/deprecated/push-notification-server.html"><strong aria-hidden="true">5.11.12.</strong> Push Notification Server</a></li><li class="chapter-item expanded "><a href="../../status/deprecated/secure-transport.html"><strong aria-hidden="true">5.11.13.</strong> Secure Transport</a></li><li class="chapter-item expanded "><a href="../../status/deprecated/waku-mailserver.html"><strong aria-hidden="true">5.11.14.</strong> Waku Mailserver</a></li><li class="chapter-item expanded "><a href="../../status/deprecated/waku-usage.html"><strong aria-hidden="true">5.11.15.</strong> Waku Usage</a></li><li class="chapter-item expanded "><a href="../../status/deprecated/whisper-mailserver.html"><strong aria-hidden="true">5.11.16.</strong> Whisper Mailserver</a></li><li class="chapter-item expanded "><a href="../../status/deprecated/whisper-usage.html"><strong aria-hidden="true">5.11.17.</strong> Whisper Usage</a></li></ol></li></ol></li></ol>
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<div id="content" class="content">
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<main>
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<h1 id="21waku2-fault-tolerant-store"><a class="header" href="#21waku2-fault-tolerant-store">21/WAKU2-FAULT-TOLERANT-STORE</a></h1>
|
|
<div class="rfc-meta">
|
|
<table>
|
|
<tr><th>Name</th><td>Waku v2 Fault-Tolerant Store</td></tr>
|
|
<tr><th>Slug</th><td>21</td></tr>
|
|
<tr><th>Status</th><td>deleted</td></tr>
|
|
<tr><th>Editor</th><td>Sanaz Taheri <sanaz@status.im></td></tr>
|
|
</table>
|
|
</div>
|
|
<!-- timeline:start -->
|
|
<h2 id="timeline"><a class="header" href="#timeline">Timeline</a></h2>
|
|
<ul>
|
|
<li><strong>2025-12-22</strong> — <a href="https://github.com/vacp2p/rfc-index/blob/b1a578393edf8487ccc97a5f25b25af9bf41efb3/docs/waku/deprecated/fault-tolerant-store.md"><code>b1a5783</code></a> — Chore/mdbook updates (#237)</li>
|
|
<li><strong>2025-12-18</strong> — <a href="https://github.com/vacp2p/rfc-index/blob/d03e699084774ebecef9c6d4662498907c5e2080/docs/waku/deprecated/fault-tolerant-store.md"><code>d03e699</code></a> — ci: add mdBook configuration (#233)</li>
|
|
<li><strong>2025-11-04</strong> — <a href="https://github.com/vacp2p/rfc-index/blob/cb4d0de84f64b37539af64b6de1e3084ffd74c6a/waku/deprecated/fault-tolerant-store.md"><code>cb4d0de</code></a> — Update 21/WAKU2-FAULT-TOLERANT-STORE: Deleted (#181)</li>
|
|
<li><strong>2024-09-13</strong> — <a href="https://github.com/vacp2p/rfc-index/blob/3ab314d87d4525ff1296bf3d9ec634d570777b91/waku/standards/application/21/fault-tolerant-store.md"><code>3ab314d</code></a> — Fix Files for Linting (#94)</li>
|
|
<li><strong>2024-03-21</strong> — <a href="https://github.com/vacp2p/rfc-index/blob/2eaa7949c4abe7d14e2b9560e8c045bf2e937c9a/waku/standards/application/21/fault-tolerant-store.md"><code>2eaa794</code></a> — Broken Links + Change Editors (#26)</li>
|
|
<li><strong>2024-01-31</strong> — <a href="https://github.com/vacp2p/rfc-index/blob/5da8a111ca9856ee53ee5b8598a7d5ecf5a2dce4/waku/standards/application/21/fault-tolerant-store.md"><code>5da8a11</code></a> — Update and rename FAULT-TOLERANT-STORE.md to fault-tolerant-store.md</li>
|
|
<li><strong>2024-01-27</strong> — <a href="https://github.com/vacp2p/rfc-index/blob/206133edd978d85993f7680bd2ce384ba0079c1f/waku/standards/application/21/FAULT-TOLERANT-STORE.md"><code>206133e</code></a> — Create FAULT-TOLERANT-STORE.md</li>
|
|
</ul>
|
|
<!-- timeline:end -->
|
|
<p>The reliability of <a href="../../core/13/store.html">13/WAKU2-STORE</a>
|
|
protocol heavily relies on the fact that full nodes i.e.,
|
|
those who persist messages have high availability and
|
|
uptime and do not miss any messages.
|
|
If a node goes offline,
|
|
then it will risk missing all the messages transmitted
|
|
in the network during that time.
|
|
In this specification,
|
|
we provide a method that makes the store protocol resilient
|
|
in presence of faulty nodes.
|
|
Relying on this method,
|
|
nodes that have been offline for a time window will be able to fix the gap
|
|
in their message history when getting back online.
|
|
Moreover, nodes with lower availability and
|
|
uptime can leverage this method to reliably provide the store protocol services
|
|
as a full node.</p>
|
|
<h2 id="method-description"><a class="header" href="#method-description">Method description</a></h2>
|
|
<p>As the first step
|
|
towards making the <a href="../../core/13/store.html">13/WAKU2-STORE</a> protocol fault-tolerant,
|
|
we introduce a new type of time-based query through which nodes fetch message history
|
|
from each other based on their desired time window.
|
|
This method operates based on the assumption that the querying node
|
|
knows some other nodes in the store protocol
|
|
which have been online for that targeted time window.</p>
|
|
<h2 id="security-consideration"><a class="header" href="#security-consideration">Security Consideration</a></h2>
|
|
<p>The main security consideration to take into account
|
|
while using this method is that a querying node
|
|
has to reveal its offline time to the queried node.
|
|
This will gradually result in the extraction of the node's activity pattern
|
|
which can lead to inference attacks.</p>
|
|
<h2 id="wire-specification"><a class="header" href="#wire-specification">Wire Specification</a></h2>
|
|
<p>We extend the <a href="../../core/13/store.html">HistoryQuery</a> protobuf message
|
|
with two fields of <code>start_time</code> and <code>end_time</code> to signify the time range to be queried.</p>
|
|
<h3 id="payloads"><a class="header" href="#payloads">Payloads</a></h3>
|
|
<pre><code class="language-diff">syntax = "proto3";
|
|
|
|
message HistoryQuery {
|
|
// the first field is reserved for future use
|
|
string pubsubtopic = 2;
|
|
repeated ContentFilter contentFilters = 3;
|
|
PagingInfo pagingInfo = 4;
|
|
+ sint64 start_time = 5;
|
|
+ sint64 end_time = 6;
|
|
}
|
|
|
|
</code></pre>
|
|
<h3 id="historyquery"><a class="header" href="#historyquery">HistoryQuery</a></h3>
|
|
<p>RPC call to query historical messages.</p>
|
|
<ul>
|
|
<li><code>start_time</code>:
|
|
this field MAY be filled out to signify the starting point of the queried time window.
|
|
This field holds the Unix epoch time in nanoseconds.<br />
|
|
The <code>messages</code> field of the corresponding
|
|
<a href="../../core/13/store.html"><code>HistoryResponse</code></a>
|
|
MUST contain historical waku messages whose
|
|
<a href="../../core/14/message.html"><code>timestamp</code></a>
|
|
is larger than or equal to the <code>start_time</code>.</li>
|
|
<li><code>end_time</code>:
|
|
this field MAY be filled out to signify the ending point of the queried time window.
|
|
This field holds the Unix epoch time in nanoseconds.
|
|
The <code>messages</code> field of the corresponding
|
|
<a href="../../core/13/store.html"><code>HistoryResponse</code></a>
|
|
MUST contain historical waku messages whose
|
|
<a href="../../core/14/message.html"><code>timestamp</code></a> is less than or equal to the <code>end_time</code>.</li>
|
|
</ul>
|
|
<p>A time-based query is considered valid if
|
|
its <code>end_time</code> is larger than or equal to the <code>start_time</code>.
|
|
Queries that do not adhere to this condition will not get through e.g.
|
|
an open-end time query in which the <code>start_time</code> is given but
|
|
no <code>end_time</code> is supplied is not valid.
|
|
If both <code>start_time</code> and
|
|
<code>end_time</code> are omitted then no time-window filter takes place.</p>
|
|
<p>In order to account for nodes asynchrony, and
|
|
assuming that nodes may be out of sync for at most 20 seconds
|
|
(i.e., 20000000000 nanoseconds),
|
|
the querying nodes SHOULD add an offset of 20 seconds to their offline time window.
|
|
That is if the original window is [<code>l</code>,<code>r</code>]
|
|
then the history query SHOULD be made for <code>[start_time: l - 20s, end_time: r + 20s]</code>.</p>
|
|
<p>Note that <code>HistoryQuery</code> preserves <code>AND</code> operation among the queried attributes.
|
|
As such, the <code>messages</code> field of the corresponding
|
|
<a href="../../core/13/store.html"><code>HistoryResponse</code></a>
|
|
MUST contain historical waku messages that satisfy the indicated <code>pubsubtopic</code> AND
|
|
<code>contentFilters</code> AND the time range [<code>start_time</code>, <code>end_time</code>].</p>
|
|
<h2 id="copyright"><a class="header" href="#copyright">Copyright</a></h2>
|
|
<p>Copyright and related rights waived via
|
|
<a href="https://creativecommons.org/publicdomain/zero/1.0/">CC0</a>.</p>
|
|
<h2 id="references"><a class="header" href="#references">References</a></h2>
|
|
<ul>
|
|
<li><a href="../../core/13/store.html">13/WAKU2-STORE</a></li>
|
|
<li><a href="../../standards/core/14/message.html"><code>timestamp</code></a></li>
|
|
</ul>
|
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