MigrationInProgress

Storage Plain v334 → v411 Changed in v411

Cursor tracking migration progress after runtime upgrades.

Queried by: developers

The Big Picture

After runtime upgrades that change storage format, contracts need migration. This cursor tracks progress. Some(cursor) = migration pending, None = complete or not needed.

Use Cases

Check migration status after upgrades
Determine if contracts are fully functional
Plan migration execution

From Chain Metadata

A migration can span across multiple blocks. This storage defines a cursor to track the progress of the migration, enabling us to resume from the last completed position.

Purpose & Usage

Purpose

Indicates whether contract storage migration is pending.

Common Query Patterns

Query to check if migration needed

Stored Value

BoundedVec

value (BoundedVec)

Relationships

Modified By

migrate

Code Examples

import { createClient, Binary } from "polkadot-api";
import { getWsProvider } from "polkadot-api/ws";
import { sub } from "@polkadot-api/descriptors"; // generated by: npx papi add sub -w wss://entrypoint-finney.opentensor.ai:443

const client = createClient(getWsProvider("wss://entrypoint-finney.opentensor.ai:443"));
const api = client.getTypedApi(sub);

// Query MigrationInProgress storage (no keys - plain value)
const result = await api.query.Contracts.MigrationInProgress.getValue();
console.log("MigrationInProgress:", result);

Version History

Version:

v334 block 6,811,690 Added

v353–v360 · runtime versions skipped on chain (never deployed)

v361 block 7,063,679 Internal re-bind

v363–v364 · runtime versions skipped on chain (never deployed)

v365 block 7,135,419 Internal re-bind

v378–v384 · runtime versions skipped on chain (never deployed)

v385 block 7,782,670 Internal re-bind

v386–v390 · runtime versions skipped on chain (never deployed)

v391 block 7,782,857 Internal re-bind

v394–v400 · runtime versions skipped on chain (never deployed)

v401 block 8,036,576 Internal re-bind

v403–v410 · runtime versions skipped on chain (never deployed)

v411 block 8,283,784 Internal re-bind Current

Runtime Info

Pallet: Contracts
Storage Kind: Plain
First Version: v334
Current Version: v411

Back to Contracts Storage