System::Event

Variant 22 v393

frame_system::pallet::Event

Event for the System pallet.

About This Type

Event enum for the Event pallet.

Contains all possible events emitted by the Event pallet. Each variant represents a different event type with its own data fields.

Variants (8)

Index	Name	Fields	Docs
0	ExtrinsicSuccess	dispatch_info: DispatchEventInfo	An extrinsic completed successfully.
1	ExtrinsicFailed	dispatch_error: DispatchError dispatch_info: DispatchEventInfo	An extrinsic failed.
2	CodeUpdated	none	`:code` was updated.
3	NewAccount	account: AccountId	A new account was created.
4	KilledAccount	account: AccountId	An account was reaped.
5	Remarked	sender: AccountId hash: H256	On on-chain remark happened.
6	UpgradeAuthorized	code_hash: H256 check_version: bool	An upgrade was authorized.
7	RejectedInvalidAuthorizedUpgrade	code_hash: H256 error: DispatchError	An invalid authorized upgrade was rejected while trying to apply it.

SCALE Encoding

Rule: 1-byte variant index followed by variant-specific field data. 8 possible variants.
Size: variable (1+ bytes)

Examples

ExtrinsicSuccess = ExtrinsicSuccess(dispatch_info)

0x00<field0>

00 Variant index 0 = ExtrinsicSuccess

field 0 dispatch_info: DispatchEventInfo

ExtrinsicFailed = ExtrinsicFailed(dispatch_error, dispatch_info)

0x01<field0><field1>

01 Variant index 1 = ExtrinsicFailed

field 0 dispatch_error: DispatchError

field 1 dispatch_info: DispatchEventInfo

CodeUpdated

0x02

02 Variant index 2 = CodeUpdated

Code Examples

import { TypeRegistry } from "@polkadot/types";

const registry = new TypeRegistry();

// Encode System::Event — variant "ExtrinsicSuccess"
const value = registry.createType("System::Event", { ExtrinsicSuccess: { dispatch_info: 0 } });
console.log("Hex:", value.toHex());

Type Parameters

Referenced By (23)

and 3 more...

Also See

System Events

Type Information

Type ID: 22
Kind: Variant
Path: frame_system::pallet::Event
Runtime: v393

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