ItemRegistry

const ir = oak.itemRegistry('0x...contractAddress');

interface Item {
  actualWeight: bigint;     // weight in grams
  height: bigint;           // height in millimetres
  width: bigint;            // width in millimetres
  length: bigint;           // length in millimetres
  category: Hex;            // bytes32 category identifier
  declaredCurrency: Hex;    // bytes32 currency identifier
}

import { keccak256, toHex } from '@oaknetwork/contracts-sdk';

const itemId = keccak256(toHex('premium-t-shirt'));

const txHash = await ir.addItem(itemId, {
  actualWeight:    250n,                              // 250g
  height:          50n,                               // 50mm
  width:           300n,                              // 300mm
  length:          400n,                              // 400mm
  category:        keccak256(toHex('apparel')),       // category
  declaredCurrency: toHex('USD', { size: 32 }),       // currency
});

await oak.waitForReceipt(txHash);

const itemIds = [
  keccak256(toHex('item-1')),
  keccak256(toHex('item-2')),
];

const items = [
  {
    actualWeight: 250n,
    height: 50n, width: 300n, length: 400n,
    category: keccak256(toHex('apparel')),
    declaredCurrency: toHex('USD', { size: 32 }),
  },
  {
    actualWeight: 500n,
    height: 100n, width: 200n, length: 300n,
    category: keccak256(toHex('electronics')),
    declaredCurrency: toHex('USD', { size: 32 }),
  },
];

const txHash = await ir.addItemsBatch(itemIds, items);
await oak.waitForReceipt(txHash);

const item = await ir.getItem('0x...ownerAddress', itemId);

console.log('Weight:', item.actualWeight, 'g');
console.log('Dimensions:', item.height, 'x', item.width, 'x', item.length, 'mm');