Jupiter Rust Amm Implementation

This is a guide to help create the implementation for easier integration with Jupiter

Example implementation

Spl token swap

You may run the test inside to run it.

Main interface

file

pub trait Amm {
    // Amm name
    fn label(&self) -> String;
    // Amm identifier, should be your pool address
    fn key(&self) -> Pubkey;
    // Token mints that the amm supports for swapping
    fn get_reserve_mints(&self) -> Vec<Pubkey>;
    // Accounts related for quoting and creating ix
    fn get_accounts_to_update(&self) -> Vec<Pubkey>;
    // Picks data necessary to update it's internal state
    fn update(&mut self, accounts_map: &HashMap<Pubkey, Vec<u8>>) -> Result<()>;
    // Returns quote for the given quote params
    fn quote(&self, quote_params: &QuoteParams) -> Result<Quote>;
    
    // Just state how do we make a swap instruction, you don't have to implement this
    fn get_swap_leg_and_account_metas(
        &self,
        swap_params: &SwapParams,
    ) -> Result<SwapLegAndAccountMetas>;

}

Quote interface

pub struct Quote {
    pub not_enough_liquidity: bool,
    pub min_in_amount: Option<u64>,
    pub min_out_amount: Option<u64>,
    pub in_amount: u64,
    pub out_amount: u64,
    pub fee_amount: u64,
    pub fee_mint: Pubkey,
    pub fee_pct: Decimal,
    pub price_impact_pct: Decimal,
}