Bounded

Variant 485 v393

frame_support::traits::preimages::Bounded

About This Type

Enum type: Bounded.

A tagged union where the first byte selects which variant is active, followed by that variant's data.

Encoding: 1-byte variant index followed by the selected variant's field data.

Variants (3)

Index	Name	Fields
0	Legacy	hash: H256
1	Inline	BoundedVec
2	Lookup	hash: H256 len: u32

SCALE Encoding

Rule: 1-byte variant index followed by variant-specific field data. 3 possible variants.
Size: variable (1+ bytes)

Examples

Legacy = Legacy(hash)

0x00<field0>

00 Variant index 0 = Legacy

field 0 hash: H256

Inline = Inline(BoundedVec)

0x01<field0>

01 Variant index 1 = Inline

field 0 field0: BoundedVec

Lookup = Lookup(hash, len)

0x02<field0><field1>

02 Variant index 2 = Lookup

field 0 hash: H256

field 1 len: u32

Code Examples

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

const registry = new TypeRegistry();

// Encode Bounded — variant "Legacy"
const value = registry.createType("Bounded", { Legacy: { hash: 0 } });
console.log("Hex:", value.toHex());

Type Parameters

T = RuntimeCall

H = BlakeTwo256

Referenced By (2)

#484 Scheduled via call #532 Option via Some

Type Information

Type ID: 485
Kind: Variant
Path: frame_support::traits::preimages::Bounded
Runtime: v393

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