Queried by: developers
The Big Picture
Contract deletion can be expensive. This queue holds contracts being cleaned up incrementally, spreading the cost across multiple blocks.
Use Cases
- Monitor cleanup progress
- Debug termination issues
From Chain Metadata
Evicted contracts that await child trie deletion. Child trie deletion is a heavy operation depending on the amount of storage items stored in said trie. Therefore this operation is performed lazily in `on_idle`.
Purpose & Usage
Purpose
Tracks contracts being cleaned up after termination.
Common Query Patterns
- Query by index
- Iterate for pending deletions
Query Keys
| # | Name | Type | Description |
|---|---|---|---|
| 1 | key1 | u32 | key1 (u32) |
Stored Value
value (BoundedVec)
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 });
// Query DeletionQueue storage
const key1 = 0;
const result = await api.query
[stringCamelCase("Contracts")]
[stringCamelCase("DeletionQueue")](
key1
);
console.log("DeletionQueue:", result.toHuman());Runtime Info
- Pallet
- Contracts
- Storage Kind
- Map
- First Version
- v334
- Current Version
- v393