What is the difference between Coin and FungibleAsset?

[0xmaayan]

Discord user ID

casimirknight

Describe your question in detail.

hey i have a doubt

transferFungibleAsset(args: {
        sender: Account;
        fungibleAssetMetadataAddress: AccountAddressInput;
        recipient: AccountAddressInput;
        amount: AnyNumber;
        options?: InputGenerateTransactionOptions;
    }): Promise<SimpleTransaction>;

and

transferCoinTransaction(args: {
        sender: AccountAddressInput;
        recipient: AccountAddressInput;
        amount: AnyNumber;
        coinType?: MoveStructId;
        options?: InputGenerateTransactionOptions;
    }): Promise<SimpleTransaction>;

1. What is the acutal difference between them?

2. Can we use both to transfer USDT or USDC?

3. what is fungibleAssetMetadataAddress? for example 0xf22bede237a07e121b56d91a491eb7bcdfd1f5907926a9e58338f964a01b17fa::asset::USDC is USDC coin type then is
   0xf22bede237a07e121b56d91a491eb7bcdfd1f5907926a9e58338f964a01b17fa the fungibleAssetMetadataAddress

4. If no then how can i find it?

What error, if any, are you getting?

No response

What have you tried or looked at? Or how can we reproduce the error?

N/A

Which operating system are you using?

N/A

Which SDK or tool are you using? (if any)

TypeScript SDK

Describe your environment or tooling in detail

No response

[gregnazario]

1. What is the actual difference between them?

Coin is the original standard for fungible tokens, similar to ERC-20 in the Ethereum space. It requires passing generic arguments to identify the coins, which is good in some cases, and less so in others. It uses a CoinStore resource to store coins in an account, but can be moved anywhere (and not dropped).

Fungible Asset is the newer standard for fungible tokens, that allows for anything to be fungible. More specifically, it uses an Object to store in a Primary store. Advantages here is that it does not require generics, instead it requires reference to the fungible asset Metadata object.

2. Can I use them to transfer stablecoins e.g. (USDC / USDT)

These don't specify stablecoins directly associated today. You can take a look at bridged stablecoins from LayerZero, Wormhole, Celer or others. Most of these are today as a Coin standard, but we are planning to have coins to be able to be migrated to fungible asset seamlessly.

3. What is FungibleAssetMetadata?
   FungibleAssetMetadata describes the fungible asset name and properties. Here is an example for the CELLANA token: https://explorer.aptoslabs.com/object/0x2ebb2ccac5e027a87fa0e2e5f656a3a4238d6a48d93ec9b610d570fc0aa0df12/resources?network=mainnet

For coins, like your example 0xf22bede237a07e121b56d91a491eb7bcdfd1f5907926a9e58338f964a01b17fa::asset::USDC there is instead a CoinInfo resource stored at that address see https://explorer.aptoslabs.com/account/0xf22bede237a07e121b56d91a491eb7bcdfd1f5907926a9e58338f964a01b17fa/resources?network=mainnet