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• .. (вверх)
• [DIR] ..
• [FILE] constants.ts
• [FILE] dynamic-fields.ts
• [FILE] format.ts
• [FILE] formatBalance.ts
• [FILE] index.ts
• [FILE] iota-types.ts
• [FILE] parse.ts

Просмотр файла: dynamic-fields.ts

// Copyright (c) Mysten Labs, Inc.
// Modifications Copyright (c) 2025 IOTA Stiftung
// SPDX-License-Identifier: Apache-2.0

import { toHex } from '@iota/bcs';
import { blake2b } from '@noble/hashes/blake2b';

import type { TypeTag } from '../bcs/bcs.js';
import { bcs } from '../bcs/index.js';

export function deriveDynamicFieldID(
    parentId: string,
    typeTag: typeof TypeTag.$inferInput,
    key: Uint8Array,
) {
    const address = bcs.Address.serialize(parentId).toBytes();
    const tag = bcs.TypeTag.serialize(typeTag).toBytes();
    const keyLength = bcs.u64().serialize(key.length).toBytes();

    const hash = blake2b.create({
        dkLen: 32,
    });

    hash.update(new Uint8Array([0xf0]));
    hash.update(address);
    hash.update(keyLength);
    hash.update(key);
    hash.update(tag);

    return `0x${toHex(hash.digest().slice(0, 32))}`;
}

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