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use std::str::FromStr;
use crate::global::METAPLEX_PROGRAM_ID;
use crate::types::{TokenInfo, TokenMetadata};
use crate::{MeteoraClient, MeteoraError};
use solana_sdk::program_pack::Pack;
use solana_sdk::pubkey::Pubkey;
use spl_token::state::Mint;
/// Manages token-related operations including fetching token information,
/// holder counts, and metadata.
pub struct TokenManager {
client: MeteoraClient,
}
impl TokenManager {
/// Creates a new TokenManager instance.
///
/// # Example
/// ```
/// use meteora_client::MeteoraClient;
/// use meteora_client::token::TokenManager;
///
/// let client = MeteoraClient::new(solana_network_sdk::types::Mode::MAIN);
/// let token_manager = TokenManager::new(client);
/// ```
pub fn new(client: MeteoraClient) -> Self {
Self { client }
}
/// Fetches comprehensive information about a token.
///
/// # Params
/// mint - The mint address of the token
///
/// # Example
/// ```
/// use solana_sdk::pubkey::Pubkey;
/// use meteora_client::token::TokenManager;
/// use meteora_client::MeteoraClient;
///
/// #[tokio::main]
/// async fn main() {
/// let client = MeteoraClient::new(solana_network_sdk::types::Mode::MAIN);
/// let token_manager = TokenManager::new(client);
/// let usdc_mint = Pubkey::new_from_array([/* USDC mint address */]);
/// match token_manager.get_token_info(&usdc_mint).await {
/// Ok(token_info) => println!("Token decimals: {}", token_info.decimals),
/// Err(e) => eprintln!("Error fetching token info: {}", e),
/// }
/// }
/// ```
pub async fn get_token_info(&self, mint: &Pubkey) -> Result<TokenInfo, MeteoraError> {
let mint_account_data = self.client.get_account_data(mint).await?;
let (decimals, supply) = self.parse_mint_account(&mint_account_data)?;
let holder_count = self.get_holder_count(mint).await?;
let metadata = self.get_token_metadata(mint).await.ok();
Ok(TokenInfo {
mint: *mint,
decimals,
supply,
holder_count,
metadata,
})
}
/// Counts the number of token holders for a given mint.
///
/// # Params
/// mint - The mint address of the token
///
/// # Example
/// ```
/// use solana_sdk::pubkey::Pubkey;
/// use meteora_client::token::TokenManager;
/// use meteora_client::MeteoraClient;
///
/// #[tokio::main]
/// async fn main() {
/// let client = MeteoraClient::new(solana_network_sdk::types::Mode::MAIN);
/// let token_manager = TokenManager::new(client);
/// let mint = Pubkey::new_from_array([/* token mint address */]);
/// match token_manager.get_holder_count(&mint).await {
/// Ok(count) => println!("Token has {} holders", count),
/// Err(e) => eprintln!("Error fetching holder count: {}", e),
/// }
/// }
/// ```
pub async fn get_holder_count(&self, mint: &Pubkey) -> Result<u64, MeteoraError> {
let accounts = self.client.get_spl_token_accounts_by_mint(mint).await?;
Ok(accounts.len() as u64)
}
/// Fetches token metadata from the Metaplex metadata account.
///
/// # Params
/// mint - The mint address of the token
///
/// # Example
/// ```
/// use solana_sdk::pubkey::Pubkey;
/// use meteora_client::token::TokenManager;
/// use meteora_client::MeteoraClient;
///
/// #[tokio::main]
/// async fn main() {
/// let client = MeteoraClient::new(solana_network_sdk::types::Mode::MAIN);
/// let token_manager = TokenManager::new(client);
/// let mint = Pubkey::new_from_array([/* token mint address */]);
/// match token_manager.get_token_metadata(&mint).await {
/// Ok(metadata) => println!("Token name: {}", metadata.name),
/// Err(e) => eprintln!("Error fetching metadata: {}", e),
/// }
/// }
/// ```
pub async fn get_token_metadata(&self, mint: &Pubkey) -> Result<TokenMetadata, MeteoraError> {
let metadata_address = self.get_metadata_account(mint);
match self.client.get_account_data(&metadata_address).await {
Ok(data) => self.parse_metadata_account(&data),
Err(_) => Err(MeteoraError::AccountNotFound(
"Token metadata not found".to_string(),
)),
}
}
fn parse_mint_account(&self, data: &[u8]) -> Result<(u8, u64), MeteoraError> {
let token_mint =
Mint::unpack(data).map_err(|e| MeteoraError::DeserializationError(e.to_string()))?;
Ok((token_mint.decimals, token_mint.supply))
}
fn get_metadata_account(&self, mint: &Pubkey) -> Pubkey {
let metaplex_program_id =
Pubkey::from_str(METAPLEX_PROGRAM_ID).expect("Failed to parse Metaplex program ID");
let seeds = &[b"metadata", metaplex_program_id.as_ref(), mint.as_ref()];
Pubkey::find_program_address(seeds, &metaplex_program_id).0
}
fn parse_metadata_account(&self, data: &[u8]) -> Result<TokenMetadata, MeteoraError> {
if data.len() < 100 {
return Err(MeteoraError::InvalidAccountData);
}
let name_start = 1 + 32 + 32; // key + update auth + mint
let name_length = data[name_start] as usize;
let name_end = name_start + 1 + name_length;
if name_end >= data.len() {
return Err(MeteoraError::InvalidAccountData);
}
let name = String::from_utf8_lossy(&data[name_start + 1..name_end]).to_string();
let symbol_start = name_end + 4; // +4 for URI length prefix
let symbol_length = data[symbol_start] as usize;
let symbol_end = symbol_start + 1 + symbol_length;
if symbol_end >= data.len() {
return Err(MeteoraError::InvalidAccountData);
}
let symbol = String::from_utf8_lossy(&data[symbol_start + 1..symbol_end]).to_string();
let uri_start = symbol_end + 4; // +4 for URI length prefix
let uri_length = data[uri_start] as usize;
let uri_end = uri_start + 1 + uri_length;
if uri_end > data.len() {
return Err(MeteoraError::InvalidAccountData);
}
let uri = String::from_utf8_lossy(&data[uri_start + 1..uri_end]).to_string();
Ok(TokenMetadata { name, symbol, uri })
}
}