SPL Token 2022 Transfer Fee

Question

Is there a way to retrieve the token extension fee for SolToken2022? When we pass the Mint address, it returns the transfer fee.

Edit:

const fee = await getTransferFeeConfig(mint
  );

  console.log("fee: ", fee);

**error**
Error fetching transfer fee config: TypeError: Cannot read properties of undefined (reading 'length')

Answer 1

You can use getTransferFeeConfig from @solana/spl-token to do this.

https://solana-labs.github.io/solana-program-library/token/js/functions/getTransferFeeConfig.html

Edit:

getTransferFeeConfig requires the mint data as an input

You can get that using getMint from @solana/spl-token

https://solana-labs.github.io/solana-program-library/token/js/functions/getMint.html

Example:

const tokenMintData = await getMint(
  connection, 
  tokenMintPubkey, 
  commitment, 
  TOKEN_PROGRAM_ID
)

const transferFeeConfig = getTransferFeeConfig(tokenMintData)