Migration pallet

Derived from live runtime metadata on TRN root (pallet index 51, captured 2026-05-02). For prose-style documentation see Migration on the curated reference side.

Pallet index

51

Calls

3

Events

7

Errors

3

Storage items

5

Constants

1

Calls (extrinsics)

Migration.enable_migration

See [Pallet::enable_migration].

api.tx.migration.enable_migration(enabled: bool)

Argument	Type	Doc
enabled	bool	bool

Call index: 0

Migration.set_block_delay

See [Pallet::set_block_delay].

api.tx.migration.set_block_delay(block_delay: Option<u32>)

Argument	Type	Doc
block_delay	Option&lt;u32&gt;	Option<u32>

Call index: 1

Migration.set_block_limit

See [Pallet::set_block_limit].

api.tx.migration.set_block_limit(block_limit: u32)

Argument	Type	Doc
block_limit	u32	u32

Call index: 2

Events

Migration.MigrationRuntimeUpgrade

No payload.

Migration.MigrationEnabled

Multi-Block migration has been enabled

No payload.

Migration.MigrationDisabled

Multi-Block migration has been disabled

No payload.

Migration.MigrationComplete

The current migration has completed

Field	Type	Doc
items_migrated	u32

Migration.MigrationSet

A Migration has been set

No payload.

Migration.BlockDelaySet

The block delay has been set

Field	Type	Doc
block_delay	Option<u32>

Migration.BlockLimitSet

The block limit has been set

Field	Type	Doc
block_limit	u32

Errors

Migration.MigrationInProgress

The extrinsic cannot be executed while an active multi-block migration is in progress

Migration.InvalidBlockDelay

The block delay must be set to None or a value greater than 1

Migration.InvalidBlockLimit

The block limit must be greater than 0

Storage

Migration.MigrationEnabled

Are we currently migrating data

await api.query.migration.migrationEnabled()

Returns: bool

Modifier: Default

Migration.Status

What is the current status of the migration

await api.query.migration.status()

Returns: {"_enum":{"NoMigrationInProgress":"Null","InProgress":"{\"stepsDone\":\"u32\"}","Completed":"Null"}}

Modifier: Default

Migration.LastKey

The last key that was migrated

await api.query.migration.lastKey()

Returns: Bytes

Modifier: Optional

Migration.BlockDelay

The delay between migration blocks

await api.query.migration.blockDelay()

Returns: u32

Modifier: Optional

Migration.BlockLimit

The maximum number of individual items to migrate in a single block Will still respect maximum weight rules

await api.query.migration.blockLimit()

Returns: u32

Modifier: Default

Constants

Migration.MaxMigrationWeight

The maximum weight this pallet can use in on_idle

Type: {"refTime":"Compact<u64>","proofSize":"Compact<u64>"}
SCALE-encoded value: 0x0700e8764817139999999999999919

Source: live chain metadata from wss://root.rootnet.live/archive/ws · captured 2026-05-02