Toncoin → Gram

Following the approved network changes, TONAPI and Tonviewer now support the new currency naming: Gram.

We have made every effort to preserve backward compatibility wherever possible.

List of Changes

1. Both Variants Are Accepted in Input Parameters

The /v2/rates/chart endpoint now supports a new currency value:

* https://tonapi.io/v2/rates/chart?token=usdt&currency=ton&points_count=5
* https://tonapi.io/v2/rates/chart?token=usdt&currency=gram&points_count=5

The response returns the currency name exactly as specified in the request parameters.

2. New Fields for Gram

Throughout the TONAPI response schema https://tonapi.io/api-v2, Gram support has been added to all fields that previously referenced TON.

For example, in the GET /v2/multisig/{account_id} endpoint, the field orders[].risk.gram has been added alongside orders[].risk.ton.

Similarly, corresponding Gram fields have been introduced across other endpoints, such as:

* ton_balance + gram_balance
* and other TON-related fields.

3. `token_name` Value Changes

The token_name field now contains the value Gram instead of TON.

4. Other User-Facing Fields

In structures where fields are primarily intended for user-facing display, references to Toncoin have been changed to Gram.

For example, in the Action structure (used by endpoints such as /v2/accounts/{account_id}/events, /v2/gasless/estimate/{master_id}, and others):

* simple_preview.name: "Ton Transfer" → "Gram Transfer"
* simple_preview.description, prefix.simple_preview.value: "5 TON" → "5 Gram"