tastytrade 0.1.0

Library for trading through tastytrade's API
Documentation 
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use super::{base::Items, quote_streaming::DxFeedSymbol};
use crate::api::base::TastyResult;
use crate::{AsSymbol, Symbol, TastyTrade};
use rust_decimal::Decimal;
use serde::Deserialize;
use serde_json::Value;
use std::collections::HashMap;

impl TastyTrade {
    pub async fn nested_option_chain_for(
        &self,
        symbol: impl Into<Symbol>,
    ) -> TastyResult<NestedOptionChain> {
        let mut resp: Items<NestedOptionChain> = self
            .get(format!("/option-chains/{}/nested", symbol.into().0))
            .await?;
        Ok(resp.items.remove(0))
    }

    pub async fn option_chain_for(
        &self,
        symbol: impl Into<Symbol>,
    ) -> TastyResult<Vec<OptionChain>> {
        let resp: Items<OptionChain> = self
            .get(format!("/option-chains/{}", symbol.into().0))
            .await?;
        Ok(resp.items)
    }

    pub async fn get_option_info(&self, symbol: impl AsSymbol) -> TastyResult<OptionInfo> {
        self.get(format!(
            "/instruments/equity-options/{}",
            symbol.as_symbol().0
        ))
        .await
    }
}

#[derive(Debug, Deserialize)]
#[serde(rename_all = "kebab-case")]
pub struct OptionInfo {
    pub streamer_symbol: DxFeedSymbol,
}

#[derive(Debug, Deserialize)]
#[serde(rename_all = "kebab-case")]
pub struct NestedOptionChain {
    pub underlying_symbol: Symbol,
    pub root_symbol: Symbol,
    pub option_chain_type: String,
    pub shares_per_contract: u64,
    pub expirations: Vec<Expiration>,
}

#[derive(Debug, Deserialize)]
#[serde(rename_all = "kebab-case")]
pub struct Expiration {
    pub expiration_type: String,
    pub expiration_date: String,
    pub days_to_expiration: u64,
    pub settlement_type: String,
    pub strikes: Vec<Strike>,
}

#[derive(Debug, Deserialize)]
#[serde(rename_all = "kebab-case")]
pub struct Strike {
    #[serde(with = "rust_decimal::serde::arbitrary_precision")]
    pub strike_price: Decimal,
    pub call: Symbol,
    pub put: Symbol,
}

#[derive(Debug, Deserialize)]
#[serde(rename_all = "kebab-case")]
pub struct OptionChain {
    pub underlying_symbol: Symbol,
    #[serde(with = "rust_decimal::serde::arbitrary_precision")]
    pub strike_price: Decimal,
    #[serde(flatten)]
    pub extra: HashMap<String, Value>,
}