# find_allowed_assets · FT4 Rell API · Chromia Docs (concept)

> function find_ allowed_ assets(sender_ blockchain_ rid: byte_ array, sender_ id: byte_ array, recipient_ id: byte_ array): map<byte_ array, big_ integer>? 

Source: https://docs.chromia.com/pages/ft4-rell/-f-t4-library/lib.ft4.core.accounts.strategies.transfer/find_allowed_assets/

FUNCTION

# find\_allowed\_assets

```signature
function find_allowed_assets(sender_blockchain_rid: byte_array, sender_id: byte_array, recipient_id: byte_array): map<byte_array, big_integer>?
```

[Source](https://gitlab.com/chromaway/ft4-lib/-/blob/development/rell/src/lib/ft4/core/accounts/strategies/transfer/config.rell#lines-166)

Finds all assets that a certain sender on a certain chain can send to the specified account
ID to allow its registration.

This function can return that no asset is allowed. This means:

* no rule allows account registration for the specified combination of parameters; or
* a rule that allows this specific registration is found, but the asset that it requires
  is not yet registered on this chain.

**Parameters**

* **sender\_blockchain\_rid** — the RID of the blockchain where the transfer will originate. This blockchain's RID for on-chain transfers.
* **sender\_id** — the ID of the sender account
* **recipient\_id** — the ID of the account that will be registered

**Returns**

a `map<asset_id: byte_array, amount: big_integer>` or null if there's no rule
allowing this specific account registration at this moment.

[View this page on docs.chromia.com](https://docs.chromia.com/pages/ft4-rell/-f-t4%20-library/lib.ft4.core.accounts.strategies.transfer/find_allowed_assets.html)Generated API reference, mirrored from the live docs