Problem

The current TransferTransaction supports only add_token_transfer and add_nft_transfer for token and NFT transfers. Unlike other SDKs (Java, JS), it does not support the following methods:

• addTokenTransferWithDecimals()
• addApprovedTokenTransfer()
• addApprovedTokenTransferWithDecimals()
• addApprovedNftTransfer()
• addApprovedHbarTransfer()

Solution

• Refactor TransferTransaction to extend AbstractTokenTransferTransaction, enabling reuse of existing logic for:

  • _addTokenTransfer()
  • _addNftTransfer()

• Add a new method in TransferTransaction to support:

  • addTokenTransferWithDecimals()
  • addApprovedTokenTransfer()
  • addApprovedTokenTransferWithDecimals()
  • addApprovedNftTransfer()
  • addApprovedHbarTransfer()

• Create unit and integration tests for all updated and new methods to ensure correctness and reliability.

Alternatives

• Implement the additional methods directly in AbstractTokenTransferTransaction so they can be shared between TransferTransaction and TokenAirdrop:
  • addTokenTransferWithDecimals()
  • addApprovedTokenTransfer()
  • addApprovedTokenTransferWithDecimals()
  • addApprovedNftTransfer()