Automatic Subscriptions

Automatic subscriptions provide real-time notifications whenever tracked on-chain data changes. These subscriptions are ideal for monitoring events that require immediate awareness, such as account balance updates, staking activity, nomination pool changes, or live chain data.

This reference lists all supported automatic subscriptions, organized by category.

Accounts

Balances

Free

Get notified when an account's free balance changes.

Frozen

Get notified when an account's frozen balance changes.

Reserved

Get notified when an account's reserved balance changes.

Spendable

Get notified when an account's spendable balance changes. An account's spendable balance is the free balance that can be spent.

Nomination Pools

Commission Changed

Get notified when a nomination pool changes its commission rate. Higher commission means a larger share of rewards is taken by the pool, reducing your payout.

Pool Name Changed

Get notified when a nomination pool's name changes at the start of a new era.

Pool State Changed

Get notified when a nomination pool's state changes at the start of a new era. The state can be Open, Blocked, or Destroying, each affecting who can join or leave the pool.

Roles Changed

Get notified when nomination pool roles are updated at the start of a new era.

Unclaimed Rewards

Get notified of unclaimed nomination pool rewards at the start of a new era.

Nominating

Commission Changed

Get notified when a commission change occurs in nominated validators.

Era Rewards

Get notified of unclaimed nominating rewards from the previous era. Polkadot Live calculates rewards directly from blockchain data in a decentralized way.

Exposure Changed

Get notified when nominating exposure changes at the start of a new era. Your address is “exposed” when at least one nominated validator is actively participating in consensus and eligible for rewards.

Nominations Changed

Get notified when nomination pool roles are updated at the start of a new era.

Debugging

Current Slot

Receive an event item when the chain's current slot changes.

Timestamps

Receive an event item when the chain's current timestamp changes.