Decimal value in primary_fungible_store::transfer_with_ref

[neethu-satheesh-s]

Hi, I have created a fungible digital asset 0x4 standard using primary_fungible_store::create_primary_store_enabled_fungible_asset with decimals as 8. How do I provide the amount in octas in primary_fungible_store::transfer_with_ref(&transfer_ref, from_address, to, amount); The amount seems to be always taking the integer part. how to provide the decimal/offset values in octas?

I'm expecting to give 100000000 in amount to represent asset worth 1
& 150000000 in amount to represent asset worth 1.5 in
primary_fungible_store::transfer_with_ref(&transfer_ref, from_address, to, amount). Is this possible?

When I tested it was considering 100000000 amount as worth 100000000.
Thanks.

[0xjunha]

The decimal should be considered after getting value from the balance field. It is for display purpose.

If you have provided 100000000 as the amount argument with decimal of 8, it represents 1 coin, not 100000000 coins.

For example, if you have a Fungible Asset with symbol of "MOON" with decimal of 8, and you want to transfer 1.5MOON, the right value for the amount arg will be 150000000, not 1.5

[neethu-satheesh-s]

Thank you @0xjunha . I need to clarify one more thing that I'm using 0x4 standard using aptos_token_objects

The example of FA like Moon, works via coin::transfer with amount 150000000 works to indicate 1.5MOON

How do we do the same for a 0x4 token standard created with aptos_token_objects::token::create_named_token and primary_fungible_store::create_primary_store_enabled_fungible_asset
and transfer via with primary_fungible_store::transfer_with_ref(&transfer_ref, from_address, to, amount) ?

Thank you

[0xjunha]

Works in the same way!
primary_fungible_store::transfer_with_ref(&transfer_ref, from_address, to, 150000000)
works for transferring 1.5MOON with 8 as decimal.

[neethu-satheesh-s]

Thank you @0xjunha I did a test to try this, but it didnot work for me.

I gave the token limit as 100 and decimal.

I tried the amount as primary_fungible_store::transfer_with_ref(&transfer_ref, from_address, to, 150000000)

It failed with the error:

assert!(store.balance >= amount, error::invalid_argument(EINSUFFICIENT_BALANCE));

error[E11001]: test failure
│ ┌─ /home/neethu/.move/https___github_com_aptos-labs_aptos-core_git_aptos-cli-v3.0.2/aptos-move/framework/aptos-framework/sources/fungible_asset.move:555:9
│ │
│ 549 │ fun withdraw_internal(
│ │ ----------------- In this function in 0x1::fungible_asset
│ ·
│ 555 │ assert!(store.balance >= amount, error::invalid_argument(EINSUFFICIENT_BALANCE));
│ │ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Test was not expected to error, but it aborted with code 65540 originating in the module 0000000000000000000000000000000000000000000000000000000000000001::fungible_asset rooted here
│

Did I miss anything? thanks

[neethu-satheesh-s]

I think I understand what I missed, I have to give the token limit in 10000000000 as well. Then it worked. Thanks @0xjunha It was great help.

[neethu-satheesh-s]

Thank you @0xjunha for helping me to resolve this.