Paused

Event v101 → current #1

Emitted when GRANDPA finality is paused by governance.

Useful for: validatorsdevelopersanalytics

The Big Picture

Pausing GRANDPA is an emergency measure. Blocks keep being produced but can't be finalized. This might happen during network upgrades, security incidents, or consensus bugs. The network is still functional but provides weaker guarantees about transaction finality.

Use Cases

Monitor network health for finality disruptions
Build alerts for consensus pauses
Track governance actions affecting finality
Pause dependent systems during finality interruption

From Chain Metadata

Current authority set has been paused.

Triggers

Preconditions

GRANDPA was previously live (not already paused)
Governance or root triggered the pause

Effects

Postconditions

GRANDPA stops finalizing new blocks
Block production continues normally
State storage reflects paused status

Side Effects

Finality confirmations stop
Light clients may not be able to sync
Cross-chain bridges may pause

This event has no data fields.

Code Examples

import { ApiPromise, WsProvider } from "@polkadot/api";
import { stringCamelCase } from "@polkadot/util";

const provider = new WsProvider("wss://entrypoint-finney.opentensor.ai:443");
const api = await ApiPromise.create({ provider });

// Subscribe to Paused events
api.query.system.events((events) => {
  events
    .filter(({ event }) =>
      event.section === stringCamelCase("Grandpa") &&
      event.method === "Paused"
    )
    .forEach(({ event }) => {
      console.log("Paused:", event.data.toHuman());
    });
});

Runtime Info

Pallet Index: 4
Event Index: 1
First Version: v101
Current Version: v393

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