AccountCodes

Storage Map v210 → v411

Maps EVM addresses to their deployed contract bytecode.

Queried by: developersanalytics

The Big Picture

Every deployed contract's bytecode is stored here. If an address has code, it's a contract; if not, it's an externally owned account (EOA). This is how the EVM knows what to execute.

Use Cases

Verify contract deployment
Distinguish contracts from EOAs
Build contract explorers
Debug contract interactions

Purpose & Usage

Purpose

Stores the executable code for each deployed smart contract.

Common Query Patterns

Query by H160 address
Check if address has code (is contract)

Query Keys

#	Name	Type	Description
1	evmAddress raw: key1	[u8; 20] [20]	key1 ([u8; 20])

Stored Value

Vec<u8> Vec

value (Vec<u8>)

Relationships

Modified By

create create2

Related Events

Created CreatedFailed Log

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 AccountCodes storage
const key1 = "0x0000000000000000000000000000000000000000";

const result = await api.query.EVM.AccountCodes.getValue(key1);
console.log("AccountCodes:", result);

Version History

Version:

v210 block 4,345,556 Added

v213–v215 · runtime versions skipped on chain (never deployed)

v216 block 4,510,996 Internal re-bind

v235–v237 · runtime versions skipped on chain (never deployed)

v238 block 4,936,550 Internal re-bind

v259–v260 · runtime versions skipped on chain (never deployed)

v261 block 5,328,895 Internal re-bind

v278–v289 · runtime versions skipped on chain (never deployed)

v290 block 5,947,548 Internal re-bind

v327–v333 · runtime versions skipped on chain (never deployed)

v334 block 6,811,690 Internal re-bind Current

Runtime Info

Pallet: EVM
Storage Kind: Map
First Version: v210
Current Version: v411

Back to EVM Storage