SPL Token in Programs

use anchor_spl::token::{self, Token, TokenAccount, Transfer};
 
#[account(mut)]
pub from: Account<'info, TokenAccount>,
pub token_program: Program<'info, Token>,
// ...
token::transfer(cpi_ctx, amount)?;

use anchor_lang::prelude::*;
use anchor_spl::associated_token::AssociatedToken;
use anchor_spl::token::{self, Mint, Token, TokenAccount, Transfer, TransferChecked};
 
#[derive(Accounts)]
pub struct Deposit<'info> {
    pub mint: Account<'info, Mint>,
    #[account(
        mut,
        associated_token::mint = mint,
        associated_token::authority = user,
    )]
    pub user_ata: Account<'info, TokenAccount>,
    #[account(
        mut,
        token::mint = mint,
        token::authority = vault_authority,
    )]
    pub vault_ata: Account<'info, TokenAccount>,
    pub user: Signer<'info>,
    /// CHECK: PDA authority over vault ATA
    pub vault_authority: UncheckedAccount<'info>,
    pub token_program: Program<'info, Token>,
    pub associated_token_program: Program<'info, AssociatedToken>,
    pub system_program: Program<'info, System>,
}
 
pub fn deposit(ctx: Context<Deposit>, amount: u64) -> Result<()> {
    require!(amount > 0, ErrorCode::ZeroAmount);
    let decimals = ctx.accounts.mint.decimals;
    let cpi = CpiContext::new(
        ctx.accounts.token_program.to_account_info(),
        TransferChecked {
            mint: ctx.accounts.mint.to_account_info(),
            from: ctx.accounts.user_ata.to_account_info(),
            to: ctx.accounts.vault_ata.to_account_info(),
            authority: ctx.accounts.user.to_account_info(),
        },
    );
    token::transfer_checked(cpi, amount, decimals)?;
    Ok(())
}
 
#[error_code]
pub enum ErrorCode {
    ZeroAmount,
}

use anchor_spl::token_interface::{
    TokenAccount as InterfaceTokenAccount,
    TokenInterface,
    transfer_checked as interface_transfer_checked,
};
 
// Use TokenInterface + InterfaceTokenAccount for Token-2022 mints