Is it possible to add buy and sell tax to solana contract

Question

I want to know like how on ethereum chains you can set fee and other functions for only sell, how can that be implemented on solana

Answer 1

You can enable transfer fee for Token2022 using the transfer fee extension with @solana/web3.js

// Instruction to initialize TransferFeeConfig Extension
const initializeTransferFeeConfig =
  createInitializeTransferFeeConfigInstruction(
    mint, // Mint Account address
    transferFeeConfigAuthority.publicKey, // Authority to update fees
    withdrawWithheldAuthority.publicKey, // Authority to withdraw fees
    feeBasisPoints, // Basis points for transfer fee calculation
    maxFee, // Maximum fee per transfer
    TOKEN_2022_PROGRAM_ID, // Token Extension Program ID
 );