Balances and Token IDs

How to check your balance and identify tokens in the Verifier contract

Multi Token Standard (NEP-245)

After a successful deposit, the Verifier contract manages tokens using the Multi Token Standard (NEP-245). This enables uniform handling of all supported token types.

Token ID format

Each token is identified by a string-based token ID, prefixed with its standard type.

Token Type	Prefix	Example
Fungible (NEP-141)	nep141:	nep141:wrap.near
Non-fungible (NEP-171)	nep171:	nep171:coolnfts.near:rock.near
Multi Token (NEP-245)	nep245:	nep245:mygame.near:shield.near

Checking your balance

After a successful deposit, query your balance using mt_balance_of, which adheres to the NEP-245 standard.

NEAR CLI

near contract call-function as-read-only intents.near mt_balance_of \
  json-args '{"account_id": "your-account.near", "token_id": "nep141:wrap.near"}' \
  network-config mainnet now

NEAR API JS

import { JsonRpcProvider } from "near-api-js";

const provider = new JsonRpcProvider({ url: "https://rpc.fastnear.com" });

const balance = await provider.callFunction({
  contractId: "intents.near",
  method: "mt_balance_of",
  args: {
    account_id: "your-account.near",
    token_id: "nep141:wrap.near",
  },
});

console.log(balance);

See contract interaction example in near-api-examples repository.

Parameter	Description
account_id	The NEAR account to check the balance of.
token_id	The token ID with its standard prefix (e.g., nep141:wrap.near). See Token ID format.

Batch balance query

To check multiple token balances at once, use mt_batch_balance_of:

NEAR CLI

near contract call-function as-read-only intents.near mt_batch_balance_of \
  json-args '{"account_id": "your-account.near", "token_ids": ["nep141:wrap.near", "nep141:usdt.tether-token.near"]}' \
  network-config mainnet now

NEAR API JS

const balances = await provider.callFunction({
  contractId: "intents.near",
  method: "mt_batch_balance_of",
  args: {
    account_id: "your-account.near",
    token_ids: [
      "nep141:wrap.near",
      "nep141:usdt.tether-token.near",
    ],
  },
});

console.log(balances);

Response:

[
  "3000004000004000006",
  "10"
]

Balances are returned in the smallest unit of each token (e.g., yoctoNEAR for wrapped NEAR).