CodeInfoOf

Storage Map v334 → v411 Changed in v411

Metadata about stored contract code.

Queried by: developersanalytics

The Big Picture

Metadata about uploaded code: who uploaded it (and can remove it), how much deposit is held, and how many contract instances reference it. Essential for code lifecycle management.

Use Cases

Check if code hash exists on-chain
Find code owner for removal
Analyze code usage (refcount)
Track deposit amounts

From Chain Metadata

A mapping from a contract's code hash to its code info.

Purpose & Usage

Purpose

Tracks code properties like owner, deposit, and reference count.

Common Query Patterns

Query by code_hash for code metadata
Check refcount before code removal
Verify code exists

Query Keys

#	Name	Type	Description
1	codeHash raw: key1	[u8; 32] [32]	key1 ([u8; 32])

Stored Value

CodeInfo

value (CodeInfo)

Relationships

Modified By

instantiate instantiate_old_weight instantiate_with_code instantiate_with_code_old_weight migrate remove_code set_code upload_code

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 CodeInfoOf storage
const key1 = "0x0000000000000000000000000000000000000000000000000000000000000000";

const result = await api.query.Contracts.CodeInfoOf.getValue(key1);
console.log("CodeInfoOf:", 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: Map
First Version: v334
Current Version: v411

Back to Contracts Storage