solana-trading-sdk 1.0.6

A Rust SDK for trading on Solana
Documentation 
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use super::{dex_traits::DexTrait, meteora_dbc_types::*, types::Create};
use crate::{
    common::{accounts::PUBKEY_WSOL, trading_endpoint::TradingEndpoint},
    dex::types::{PoolInfo, SwapInfo},
    instruction::builder::PriorityFee,
};
use solana_client::{
    rpc_config::{RpcAccountInfoConfig, RpcProgramAccountsConfig},
    rpc_filter::{Memcmp, MemcmpEncodedBytes, RpcFilterType},
};
use solana_sdk::{
    instruction::{AccountMeta, Instruction},
    pubkey::Pubkey,
    signature::{Keypair, Signature},
    signer::Signer,
};
use spl_associated_token_account::get_associated_token_address;
use std::sync::Arc;

pub struct MeteoraDBC {
    pub endpoint: Arc<TradingEndpoint>,
}

#[async_trait::async_trait]
impl DexTrait for MeteoraDBC {
    async fn initialize(&self) -> anyhow::Result<()> {
        Ok(())
    }

    fn initialized(&self) -> anyhow::Result<()> {
        Ok(())
    }

    fn get_trading_endpoint(&self) -> Arc<TradingEndpoint> {
        self.endpoint.clone()
    }

    fn use_wsol(&self) -> bool {
        true
    }

    async fn get_pool(&self, mint: &Pubkey) -> anyhow::Result<PoolInfo> {
        let bonding_curve = self.get_pool_by_base_mint(mint).await?;
        let pool = Self::get_virtual_pool_pda(mint, &bonding_curve.config)?;
        let sqrt_price = (bonding_curve.sqrt_price as f64) / (2u128.pow(64) as f64);
        let price = sqrt_price * sqrt_price;
        let virtual_sol_reserve = price * bonding_curve.base_reserve as f64;

        Ok(PoolInfo {
            pool,
            creator: Some(bonding_curve.creator),
            creator_vault: None,
            config: Some(bonding_curve.config),
            extra_address: Some(bonding_curve.config),
            token_reserves: bonding_curve.base_reserve,
            sol_reserves: virtual_sol_reserve as u64,
        })
    }

    async fn create(&self, _: Keypair, _: Create, _: Option<PriorityFee>, _: Option<u64>) -> anyhow::Result<Vec<Signature>> {
        Err(anyhow::anyhow!("Not supported"))
    }

    fn build_buy_instruction(&self, payer: &Keypair, mint: &Pubkey, config: Option<&Pubkey>, buy: SwapInfo) -> anyhow::Result<Instruction> {
        self.initialized()?;

        let buy_info = SwapInstruction::from_swap_info(&buy, true);
        let buffer = buy_info.to_buffer()?;
        let config = config.ok_or_else(|| anyhow::anyhow!("Config must be provided for buy instruction"))?;
        let bonding_curve = Self::get_virtual_pool_pda(mint, config)?;
        let bonding_curve_vault = Self::get_bonding_curve_vault(&bonding_curve, mint)?;
        let bonding_curve_sol_vault = Self::get_bonding_curve_vault(&bonding_curve, &PUBKEY_WSOL)?;

        Ok(Instruction::new_with_bytes(
            PUBKEY_METEORA_DBC,
            &buffer,
            vec![
                AccountMeta::new_readonly(PUBKEY_METEORA_DBC_POOL_AUTHORITY, false),
                AccountMeta::new_readonly(*config, false),
                AccountMeta::new(bonding_curve, false),
                AccountMeta::new(get_associated_token_address(&payer.pubkey(), &PUBKEY_WSOL), false),
                AccountMeta::new(get_associated_token_address(&payer.pubkey(), mint), false),
                AccountMeta::new(bonding_curve_vault, false),
                AccountMeta::new(bonding_curve_sol_vault, false),
                AccountMeta::new_readonly(*mint, false),
                AccountMeta::new_readonly(PUBKEY_WSOL, false),
                AccountMeta::new(payer.pubkey(), true),
                AccountMeta::new_readonly(spl_token::ID, false),
                AccountMeta::new_readonly(spl_token::ID, false),
                AccountMeta::new_readonly(PUBKEY_METEORA_DBC, false),
                AccountMeta::new_readonly(PUBKEY_METEORA_DBC_EVENT_AUTHORITY, false),
                AccountMeta::new_readonly(PUBKEY_METEORA_DBC, false),
            ],
        ))
    }

    fn build_sell_instruction(&self, payer: &Keypair, mint: &Pubkey, config: Option<&Pubkey>, sell: SwapInfo) -> anyhow::Result<Instruction> {
        self.initialized()?;

        let sell_info = SwapInstruction::from_swap_info(&sell, false);
        let buffer = sell_info.to_buffer()?;
        let config = config.ok_or_else(|| anyhow::anyhow!("Config must be provided for sell instruction"))?;
        let bonding_curve = Self::get_virtual_pool_pda(mint, config)?;
        let bonding_curve_vault = Self::get_bonding_curve_vault(&bonding_curve, mint)?;
        let bonding_curve_sol_vault = Self::get_bonding_curve_vault(&bonding_curve, &PUBKEY_WSOL)?;

        Ok(Instruction::new_with_bytes(
            PUBKEY_METEORA_DBC,
            &buffer,
            vec![
                AccountMeta::new_readonly(PUBKEY_METEORA_DBC_POOL_AUTHORITY, false),
                AccountMeta::new_readonly(*config, false),
                AccountMeta::new(bonding_curve, false),
                AccountMeta::new(get_associated_token_address(&payer.pubkey(), mint), false),
                AccountMeta::new(get_associated_token_address(&payer.pubkey(), &PUBKEY_WSOL), false),
                AccountMeta::new(bonding_curve_vault, false),
                AccountMeta::new(bonding_curve_sol_vault, false),
                AccountMeta::new_readonly(*mint, false),
                AccountMeta::new_readonly(PUBKEY_WSOL, false),
                AccountMeta::new(payer.pubkey(), true),
                AccountMeta::new_readonly(spl_token::ID, false),
                AccountMeta::new_readonly(spl_token::ID, false),
                AccountMeta::new_readonly(PUBKEY_METEORA_DBC, false),
                AccountMeta::new_readonly(PUBKEY_METEORA_DBC_EVENT_AUTHORITY, false),
                AccountMeta::new_readonly(PUBKEY_METEORA_DBC, false),
            ],
        ))
    }
}

impl MeteoraDBC {
    pub fn new(endpoint: Arc<TradingEndpoint>) -> Self {
        Self { endpoint }
    }

    pub fn get_virtual_pool_pda(mint: &Pubkey, config: &Pubkey) -> anyhow::Result<Pubkey> {
        let seeds = &[VIRTUAL_POOL_SEED, config.as_ref(), mint.as_ref(), PUBKEY_WSOL.as_ref()];
        let pda = Pubkey::try_find_program_address(seeds, &PUBKEY_METEORA_DBC).ok_or_else(|| anyhow::anyhow!("Failed to find virtual pool PDA"))?;
        Ok(pda.0)
    }

    pub fn get_bonding_curve_vault(pool: &Pubkey, mint: &Pubkey) -> anyhow::Result<Pubkey> {
        let seeds = &[VIRTUAL_POOL_VAULT_SEED, mint.as_ref(), pool.as_ref()];
        let pda = Pubkey::try_find_program_address(seeds, &PUBKEY_METEORA_DBC).ok_or_else(|| anyhow::anyhow!("Failed to find bonding curve vault PDA"))?;
        Ok(pda.0)
    }

    pub async fn get_pool_by_base_mint(&self, base_mint: &Pubkey) -> anyhow::Result<VirtualPool> {
        let accounts = self
            .endpoint
            .rpc
            .get_program_accounts_with_config(
                &PUBKEY_METEORA_DBC,
                RpcProgramAccountsConfig {
                    filters: Some(vec![RpcFilterType::Memcmp(Memcmp::new(
                        136,
                        MemcmpEncodedBytes::Bytes(base_mint.to_bytes().to_vec()),
                    ))]),
                    account_config: RpcAccountInfoConfig {
                        encoding: Some(solana_account_decoder::UiAccountEncoding::Base64),
                        commitment: None,
                        data_slice: None,
                        min_context_slot: None,
                    },
                    with_context: None,
                    sort_results: None,
                },
            )
            .await?;
        if accounts.is_empty() {
            return Err(anyhow::anyhow!("No bonding curve found for base mint: {}", base_mint.to_string()));
        }
        let bonding_curve = bincode::deserialize::<VirtualPool>(&accounts[0].1.data)?;

        Ok(bonding_curve)
    }
}