breez_sdk_liquid/swapper/boltz/
client.rs

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use crate::{
    bitcoin, elements,
    model::{BlockchainExplorer, Config},
};
use boltz_client::{
    error::Error,
    network::{
        esplora::{EsploraBitcoinClient, EsploraLiquidClient},
        BitcoinChain, BitcoinClient as BoltzBitcoinClient, LiquidChain,
        LiquidClient as BoltzLiquidClient,
    },
};
use sdk_macros::async_trait;

const BOLTZ_CONNECTION_TIMEOUT: u8 = 100;

pub(crate) enum LiquidClient {
    #[cfg(not(all(target_family = "wasm", target_os = "unknown")))]
    Electrum(Box<boltz_client::network::electrum::ElectrumLiquidClient>),
    Esplora(Box<EsploraLiquidClient>),
}

impl LiquidClient {
    pub(crate) fn new(config: &Config) -> Result<Self, Error> {
        Ok(match &config.liquid_explorer {
            #[cfg(not(all(target_family = "wasm", target_os = "unknown")))]
            BlockchainExplorer::Electrum { url } => {
                let (tls, validate_domain) = config.electrum_tls_options();
                Self::Electrum(Box::new(
                    boltz_client::network::electrum::ElectrumLiquidClient::new(
                        config.network.into(),
                        url,
                        tls,
                        validate_domain,
                        BOLTZ_CONNECTION_TIMEOUT,
                    )?,
                ))
            }
            BlockchainExplorer::Esplora { url, .. } => {
                Self::Esplora(Box::new(EsploraLiquidClient::new(
                    config.network.into(),
                    url,
                    BOLTZ_CONNECTION_TIMEOUT as u64,
                )))
            }
        })
    }
}

#[async_trait]
impl BoltzLiquidClient for LiquidClient {
    async fn get_address_utxo(
        &self,
        address: &elements::Address,
    ) -> Result<Option<(elements::OutPoint, elements::TxOut)>, Error> {
        match self {
            #[cfg(not(all(target_family = "wasm", target_os = "unknown")))]
            Self::Electrum(c) => c.get_address_utxo(address).await,
            Self::Esplora(c) => c.get_address_utxo(address).await,
        }
    }

    async fn get_genesis_hash(&self) -> Result<elements::BlockHash, Error> {
        match self {
            #[cfg(not(all(target_family = "wasm", target_os = "unknown")))]
            Self::Electrum(c) => c.get_genesis_hash().await,
            Self::Esplora(c) => c.get_genesis_hash().await,
        }
    }

    async fn broadcast_tx(&self, signed_tx: &elements::Transaction) -> Result<String, Error> {
        match self {
            #[cfg(not(all(target_family = "wasm", target_os = "unknown")))]
            Self::Electrum(c) => c.broadcast_tx(signed_tx).await,
            Self::Esplora(c) => c.broadcast_tx(signed_tx).await,
        }
    }

    fn network(&self) -> LiquidChain {
        match self {
            #[cfg(not(all(target_family = "wasm", target_os = "unknown")))]
            Self::Electrum(c) => c.network(),
            Self::Esplora(c) => c.network(),
        }
    }
}

pub(crate) enum BitcoinClient {
    #[cfg(not(all(target_family = "wasm", target_os = "unknown")))]
    Electrum(Box<boltz_client::network::electrum::ElectrumBitcoinClient>),
    Esplora(Box<EsploraBitcoinClient>),
}

impl BitcoinClient {
    pub(crate) fn new(config: &Config) -> Result<Self, Error> {
        Ok(match &config.bitcoin_explorer {
            #[cfg(not(all(target_family = "wasm", target_os = "unknown")))]
            BlockchainExplorer::Electrum { url } => {
                let (tls, validate_domain) = config.electrum_tls_options();
                Self::Electrum(Box::new(
                    boltz_client::network::electrum::ElectrumBitcoinClient::new(
                        config.network.as_bitcoin_chain(),
                        url,
                        tls,
                        validate_domain,
                        BOLTZ_CONNECTION_TIMEOUT,
                    )?,
                ))
            }
            BlockchainExplorer::Esplora { url, .. } => {
                Self::Esplora(Box::new(EsploraBitcoinClient::new(
                    config.network.as_bitcoin_chain(),
                    url,
                    BOLTZ_CONNECTION_TIMEOUT as u64,
                )))
            }
        })
    }
}

#[async_trait]
impl BoltzBitcoinClient for BitcoinClient {
    async fn get_address_balance(&self, address: &bitcoin::Address) -> Result<(u64, i64), Error> {
        match self {
            #[cfg(not(all(target_family = "wasm", target_os = "unknown")))]
            Self::Electrum(c) => c.get_address_balance(address).await,
            Self::Esplora(c) => c.get_address_balance(address).await,
        }
    }

    async fn get_address_utxos(
        &self,
        address: &bitcoin::Address,
    ) -> Result<Vec<(bitcoin::OutPoint, bitcoin::TxOut)>, Error> {
        match self {
            #[cfg(not(all(target_family = "wasm", target_os = "unknown")))]
            Self::Electrum(c) => c.get_address_utxos(address).await,
            Self::Esplora(c) => c.get_address_utxos(address).await,
        }
    }

    async fn broadcast_tx(&self, signed_tx: &bitcoin::Transaction) -> Result<bitcoin::Txid, Error> {
        match self {
            #[cfg(not(all(target_family = "wasm", target_os = "unknown")))]
            Self::Electrum(c) => c.broadcast_tx(signed_tx).await,
            Self::Esplora(c) => c.broadcast_tx(signed_tx).await,
        }
    }

    fn network(&self) -> BitcoinChain {
        match self {
            #[cfg(not(all(target_family = "wasm", target_os = "unknown")))]
            Self::Electrum(c) => c.network(),
            Self::Esplora(c) => c.network(),
        }
    }
}