Function arguments for transfer payload

[singhparshant]

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Describe your question in detail.

Hi, I had a question regarding transfer in typescript sdk for aptos.
Are the typearguments required in the transferpayload generation ? Can i use coin typeargument for FA here ?

    const faTransferAbi: EntryFunctionABI = {
      typeParameters: [{ constraints: [] }],
      parameters: [parseTypeTag("0x1::object::Object"), new TypeTagAddress(), new TypeTagU64()],
    };

    const aptosTransferAbi: EntryFunctionABI = {
      typeParameters: [{ constraints: [] }],
      parameters: [new TypeTagAddress(), new TypeTagU64()],
    };

    const coinTransferAbi: EntryFunctionABI = {
      typeParameters: [{ constraints: [] }],
      parameters: [new TypeTagAddress(), new TypeTagU64()],
    };
    
Are the typearguments required in the transferpayload generation ? Can i use coin  typeargument for FA here ?
 const transactionPayload = await generateTransactionPayload({
      aptosConfig: this.client.aptos.config,
      function: isNativeTransfer ? "0x1::aptos_account::transfer" : "0x1::primary_fungible_store::transfer",
      typeArguments: isNativeTransfer ? [] : ["0x1::fungible_asset::Metadata"],
      functionArguments: [
        AccountAddress.from("0xbae207659db88bea0cbead6da0ed00aac12edcdda169e591cd41c94180b46f3b"), // USDC
        recipientAddress,
        transferRequest.amount?.toString() ?? "100",
      ],
      abi: isNativeTransfer ? aptosTransferAbi : faTransferAbi,
    });

And same with the ABI ? Seems redundant with function name, abi and type argument just describing the same thing

What error, if any, are you getting?

No response

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

No response

Which operating system are you using?

macOS

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

TypeScript SDK

Describe your environment or tooling in detail

No response

[0x-j]

for 0x1::aptos_account::transfer you don't need to pass type arg

for 0x1::primary_fungible_store::transfer, you do need to pass type arg

you can look at explorer and see if type arg is required in source code, https://explorer.aptoslabs.com/account/0x0000000000000000000000000000000000000000000000000000000000000001/modules/run/primary_fungible_store/transfer?network=mainnet

[singhparshant]

But what is the recommended approach to transfer ? Looking at petra's transactions, it always 0x1::aptos_account::transfer_coins for both native and legacy coin transfers.
And 0x1::primary_fungible_store::transfer for FA with 0x1::fungible_asset::Metadata as typearg

[0x-j]

most APT in users wallet are still in coin format, so i recommend 0x1::aptos_account::transfer_coins

but for native USDT and native USDC where they only have FA format, use 0x1::primary_fungible_store::transfer

[singhparshant]

Thanks.