BitGet solver

config/example.bitget.toml

@@ -0,0 +1,19 @@
+node-url = "http://localhost:8545"
+
+[dex]
+# Specify which chain to use, 1 for Ethereum.
+# Supported chains: eth (1), bsc (56), base (8453)
+chain-id = "1"
+
+# Optionally specify a custom Bitget swap API endpoint
+# endpoint = "https://bopenapi.bgwapi.io/bgw-pro/swapx/pro/"
+
+[dex.credentials]
+# Bitget API key (obtain from Bitget integration team)
+api-key = "$BITGET_API_KEY"
+
+# Bitget API secret for signing requests
+api-secret = "$BITGET_API_SECRET"
+
+# Partner code sent in the Partner-Code header (defaults to "cowswap")
+# partner-code = "Cowswap"

src/infra/cli.rs

@@ -59,4 +59,9 @@ pub enum Command {
         #[clap(long, env)]
         config: PathBuf,
     },
+    /// solve individual orders using Bitget API
+    Bitget {
+        #[clap(long, env)]
+        config: PathBuf,
+    },
 }

src/infra/config/dex/bitget/file.rs

@@ -0,0 +1,78 @@
+use {
+    crate::{
+        domain::eth,
+        infra::{config::dex::file, dex::bitget},
+    },
+    serde::Deserialize,
+    serde_with::serde_as,
+    std::path::Path,
+};
+
+#[serde_as]
+#[derive(Deserialize)]
+#[serde(rename_all = "kebab-case", deny_unknown_fields)]
+struct Config {
+    /// The base URL for the Bitget swap API.
+    #[serde(default = "default_endpoint")]
+    #[serde_as(as = "serde_with::DisplayFromStr")]
+    endpoint: reqwest::Url,
+
+    /// Chain ID used to automatically determine contract addresses.
+    chain_id: eth::ChainId,
+
+    /// Bitget API credentials.
+    credentials: BitgetCredentialsConfig,
+
+    /// Partner code sent in the `Partner-Code` header.
+    #[serde(default = "default_partner_code")]
+    partner_code: String,
+}
+
+#[derive(Deserialize)]
+#[serde(rename_all = "kebab-case", deny_unknown_fields)]
+struct BitgetCredentialsConfig {
+    /// Bitget API key.
+    api_key: String,
+
+    /// Bitget API secret for signing requests.
+    api_secret: String,
+}
+
+#[allow(clippy::from_over_into)]
+impl Into<bitget::BitgetCredentialsConfig> for BitgetCredentialsConfig {
+    fn into(self) -> bitget::BitgetCredentialsConfig {
+        bitget::BitgetCredentialsConfig {
+            api_key: self.api_key,
+            api_secret: self.api_secret,
+        }
+    }
+}
+
+fn default_partner_code() -> String {
+    "cowswap".to_string()
+}
+
+fn default_endpoint() -> reqwest::Url {
+    bitget::DEFAULT_ENDPOINT.parse().unwrap()
+}
+
+/// Load the Bitget solver configuration from a TOML file.
+///
+/// # Panics
+///
+/// This method panics if the config is invalid or on I/O errors.
+pub async fn load(path: &Path) -> super::Config {
+    let (base, config) = file::load::<Config>(path).await;
+
+    super::Config {
+        bitget: bitget::Config {
+            endpoint: config.endpoint,
+            chain_id: config.chain_id,
+            credentials: config.credentials.into(),
+            partner_code: config.partner_code,
+            block_stream: base.block_stream.clone(),
+            settlement_contract: base.contracts.settlement,
+        },
+        base,
+    }
+}

src/infra/config/dex/bitget/mod.rs

@@ -0,0 +1,6 @@
+pub mod file;
+
+pub struct Config {
+    pub bitget: crate::infra::dex::bitget::Config,
+    pub base: super::Config,
+}

src/infra/config/dex/mod.rs

@@ -1,4 +1,5 @@
 pub mod balancer;
+pub mod bitget;
 mod file;
 pub mod okx;
 pub mod oneinch;

src/infra/dex/bitget/dto.rs

@@ -0,0 +1,163 @@
+//! DTOs for the Bitget swap API.
+//! Full documentation: https://web3.bitget.com/en/docs/swap/
+
+use {
+    crate::domain::{dex, eth},
+    bigdecimal::{BigDecimal, ToPrimitive},
+    serde::{Deserialize, Serialize},
+    serde_with::serde_as,
+};
+
+/// Bitget chain name used in API requests.
+#[derive(Clone, Copy, Serialize)]
+pub enum ChainName {
+    #[serde(rename = "eth")]
+    Mainnet,
+    #[serde(rename = "bsc")]
+    Bnb,
+    #[serde(rename = "base")]
+    Base,
+    #[serde(rename = "polygon")]
+    Polygon,
+    #[serde(rename = "arb")]
+    ArbitrumOne,
+}
+
+impl ChainName {
+    pub fn new(chain_id: eth::ChainId) -> Self {
+        match chain_id {
+            eth::ChainId::Mainnet => Self::Mainnet,
+            eth::ChainId::Bnb => Self::Bnb,
+            eth::ChainId::Base => Self::Base,
+            eth::ChainId::Polygon => Self::Polygon,
+            eth::ChainId::ArbitrumOne => Self::ArbitrumOne,
+            _ => panic!("unsupported Bitget chain: {chain_id:?}"),
+        }
+    }
+}
+
+/// A Bitget API swap request with enriched response (`requestMod = "rich"`).
+///
+/// See [API](https://web3.bitget.com/en/docs/swap/)
+/// documentation for more detailed information on each parameter.
+#[serde_as]
+#[derive(Clone, Serialize)]
+#[serde(rename_all = "camelCase")]
+pub struct SwapRequest {
+    /// Source token contract address.
+    pub from_contract: eth::Address,
+
+    /// Input amount in human-readable decimal units (e.g. "1" for 1 WETH).
+    #[serde_as(as = "serde_with::DisplayFromStr")]
+    pub from_amount: BigDecimal,
+
+    /// Source chain name.
+    pub from_chain: ChainName,
+
+    /// Target token contract address.
+    pub to_contract: eth::Address,
+
+    /// Target chain name.
+    pub to_chain: ChainName,
+
+    /// Debit address.
+    pub from_address: eth::Address,
+
+    /// Recipient address.
+    pub to_address: eth::Address,
+
+    /// Optimal channel - hardcoded to "bgwevmaggregator" for EVM chains.
+    pub market: String,
+
+    /// Slippage tolerance as a percentage (e.g. 1.0 for 1%).
+    pub slippage: f64,
+
+    /// Request mode - "rich" returns quote data alongside swap calldata.
+    pub request_mod: String,
+
+    /// Fee rate in per mille. 0 for no fee.
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub fee_rate: Option<f64>,
+}
+
+impl SwapRequest {
+    pub fn from_order(
+        order: &dex::Order,
+        chain_name: ChainName,
+        settlement_contract: eth::Address,
+        slippage: &dex::Slippage,
+        sell_decimals: u8,
+    ) -> Self {
+        Self {
+            from_contract: order.sell.0,
+            from_amount: super::wei_to_decimal(order.amount.get(), sell_decimals),
+            from_chain: chain_name,
+            to_contract: order.buy.0,
+            to_chain: chain_name,
+            from_address: settlement_contract,
+            to_address: settlement_contract,
+            market: "bgwevmaggregator".to_string(),
+            slippage: slippage.as_factor().to_f64().unwrap_or_default() * 100.0,
+            request_mod: "rich".to_string(),
+            fee_rate: Some(0.0),
+        }
+    }
+}
+
+/// A Bitget API enriched swap response (returned when `requestMod = "rich"`).
+#[serde_as]
+#[derive(Deserialize, Clone, Debug)]
+#[serde(rename_all = "camelCase")]
+#[allow(dead_code)]
+pub struct SwapResponse {
+    /// Output amount in decimal units.
+    #[serde_as(as = "serde_with::DisplayFromStr")]
+    pub out_amount: BigDecimal,
+
+    /// Minimum output amount after slippage (computed by API).
+    #[serde_as(as = "serde_with::DisplayFromStr")]
+    pub min_amount: BigDecimal,
+
+    /// Gas fee information.
+    pub gas_fee: GasFee,
+
+    /// Transaction data for the swap.
+    pub swap_transaction: SwapTransaction,
+}
+
+#[serde_as]
+#[derive(Deserialize, Clone, Debug)]
+#[serde(rename_all = "camelCase")]
+pub struct GasFee {
+    #[serde_as(as = "serde_with::DisplayFromStr")]
+    pub gas_limit: u64,
+}
+
+#[derive(Deserialize, Clone, Debug)]
+pub struct SwapTransaction {
+    /// Contract address (router/spender).
+    pub to: eth::Address,
+    /// Hex-encoded calldata with "0x" prefix.
+    pub data: String,
+}
+
+impl SwapTransaction {
+    /// Decode the hex-encoded calldata (with "0x" prefix) to bytes.
+    pub fn decode_calldata(&self) -> Result<Vec<u8>, hex::FromHexError> {
+        let hex_str = self.data.strip_prefix("0x").unwrap_or(&self.data);
+        hex::decode(hex_str)
+    }
+}
+
+/// A Bitget API response wrapper.
+///
+/// On success `status` is 0 and `data` contains the result.
+/// On error `status` is non-zero and `data` is null.
+#[derive(Deserialize, Clone, Debug)]
+pub struct Response<T> {
+    /// Response status code (0 = success).
+    pub status: i64,
+
+    /// Response data — `None` when the API returns an error.
+    pub data: Option<T>,
+}