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  1. Technical
  2. Protocol Reference
  3. Ledger Data
  4. Ledger Objects Types

Hook State

Last updated 1 year ago

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(Added by the [Hooks amendment][].)

A HookState object describes the state of a hook, which is a piece of code running on Xahau that can interact with transactions. The HookState object stores the state of the hook, which can be modified by the hook's code.

Example JSON

{
  "OwnerNode": "0000000000000000",
  "HookStateKey": "49647F0D748DC3FE26BDACBC57F251AADEFFF391403EC9BF87C97F67E9977FB0",
  "HookStateData": "46060241FABCF692D4D934BA2A6C4427CD4279083E38C77CBE642243E43BE291",
  "LedgerEntryType": "HookState",
  "index": "5463C6E08862A1FAE5EDAC12D70ADB16546A1F674930521295BC082494B62924"
}

Fields

A HookState object has the following fields:

Field
JSON Type
[Internal Type][]
Required?
Description

OwnerNode

String

UInt64

Yes

A hint indicating which page of the owner's directory links to this object, in case the directory consists of multiple pages.

HookStateKey

String

Hash256

Yes

The key that uniquely identifies this hook state.

HookStateData

String

VL

Yes

The data stored by the hook. This can be any data that the hook's code decides to store.

LedgerEntryType

String

UInt16

Yes

The value 0x0043, mapped to the string HookState, indicates that this object is a HookState object.

HookState ID Format

The ID of a HookState object is the [SHA-512Half][] of the following values, concatenated in order:

  • The HookState space key (0x0076)

  • The AccountID of the account that owns the hook

  • The HookStateKey of the HookState object

  • The HookNamespace of the hook.

[Source]
[Source]