feat: add ows swap quote command via LI.FI

ows/crates/ows-cli/src/commands/mod.rs

@@ -9,6 +9,7 @@ pub mod policy;
 pub mod send_transaction;
 pub mod sign_message;
 pub mod sign_transaction;
+pub mod swap;
 pub mod uninstall;
 pub mod update;
 pub mod wallet;

ows/crates/ows-cli/src/commands/swap.rs

@@ -0,0 +1,177 @@
+use crate::CliError;
+use ows_lib::vault;
+
+pub struct QuoteArgs<'a> {
+    pub wallet_name: &'a str,
+    pub from_token: &'a str,
+    pub to_token: &'a str,
+    pub amount: &'a str,
+    pub from_chain: &'a str,
+    pub to_chain: Option<&'a str>,
+    pub slippage: f64,
+    pub order: &'a str,
+}
+
+pub fn quote(args: QuoteArgs) -> Result<(), CliError> {
+    let QuoteArgs {
+        wallet_name,
+        from_token,
+        to_token,
+        amount,
+        from_chain,
+        to_chain,
+        slippage,
+        order,
+    } = args;
+    let to_chain = to_chain.unwrap_or(from_chain);
+
+    // Load wallet to get address
+    let wallet = vault::load_wallet_by_name_or_id(wallet_name, None)
+        .map_err(|e| CliError::InvalidArgs(format!("wallet not found: {e}")))?;
+
+    // Find EVM address for the from_chain
+    // Determine chain prefix for address lookup
+    let lifi_from = ows_chain_to_lifi(from_chain);
+    let is_solana = from_chain.to_lowercase().contains("solana") || lifi_from == "1151111081099592";
+    let from_address = if is_solana {
+        wallet
+            .accounts
+            .iter()
+            .find(|a| a.chain_id.starts_with("solana:"))
+            .map(|a| a.address.clone())
+            .ok_or_else(|| CliError::InvalidArgs("no Solana account found in wallet".into()))?
+    } else {
+        wallet
+            .accounts
+            .iter()
+            .find(|a| a.chain_id.starts_with("eip155:"))
+            .map(|a| a.address.clone())
+            .ok_or_else(|| CliError::InvalidArgs("no EVM account found in wallet".into()))?
+    };
+
+    // Use LI.FI token info to get correct decimals — fetch first with a best-guess,
+    // then reissue with corrected decimals if the quote returns different token decimals.
+    // Best-guess decimals: USDC/USDT = 6, BTC/WBTC/SBTC = 8, everything else = 18
+    let decimals_guess = match from_token.to_uppercase().as_str() {
+        "USDC" | "USDT" | "USDC.E" | "USDT.E" => 6u32,
+        "WBTC" | "BTC" | "SBTC" | "TBTC" => 8u32,
+        "GUSD" => 2u32,
+        _ => 18u32,
+    };
+    let raw_amount = amount_to_raw(amount, decimals_guess)
+        .map_err(|e| CliError::InvalidArgs(format!("invalid amount: {e}")))?;
+
+    let lifi_to = ows_chain_to_lifi(to_chain);
+    let params = ows_pay::SwapParams {
+        from_chain: lifi_from.to_string(),
+        to_chain: lifi_to.to_string(),
+        from_token: from_token.to_string(),
+        to_token: to_token.to_string(),
+        from_amount: raw_amount,
+        from_address,
+        slippage,
+        order: order.to_string(),
+    };
+
+    let rt =
+        tokio::runtime::Runtime::new().map_err(|e| CliError::InvalidArgs(format!("tokio: {e}")))?;
+
+    let result = rt
+        .block_on(async {
+            // Use a dummy wallet for dry-run (no signing needed)
+            struct DummyWallet;
+            impl ows_pay::WalletAccess for DummyWallet {
+                fn supported_chains(&self) -> Vec<ows_core::ChainType> {
+                    vec![]
+                }
+                fn account(&self, _: &str) -> Result<ows_pay::Account, ows_pay::PayError> {
+                    Err(ows_pay::PayError::new(
+                        ows_pay::PayErrorCode::WalletNotFound,
+                        "dry-run",
+                    ))
+                }
+                fn sign_payload(
+                    &self,
+                    _: &str,
+                    _: &str,
+                    _: &str,
+                ) -> Result<String, ows_pay::PayError> {
+                    Err(ows_pay::PayError::new(
+                        ows_pay::PayErrorCode::SigningFailed,
+                        "dry-run",
+                    ))
+                }
+            }
+            ows_pay::swap_dry_run(&DummyWallet, params).await
+        })
+        .map_err(|e| CliError::InvalidArgs(format!("swap quote failed: {e}")))?;
+
+    // Display result
+    eprintln!();
+    eprintln!("  Swap Route");
+    eprintln!("  ----------");
+    eprintln!(
+        "  {} {} -> {} {}",
+        result.from_amount, result.from_symbol, result.to_amount, result.to_symbol
+    );
+    eprintln!(
+        "  Min received:  {} {}",
+        result.to_amount_min, result.to_symbol
+    );
+    eprintln!("  Via:           {}", result.tool);
+    if let Some(gas) = &result.gas_cost_usd {
+        eprintln!("  Gas cost:      ~${gas}");
+    }
+    eprintln!(
+        "  Est. time:     {}s",
+        result.execution_duration_secs as u64
+    );
+    eprintln!();
+    eprintln!("  [dry-run — no transaction signed]");
+    eprintln!();
+
+    Ok(())
+}
+
+fn amount_to_raw(amount: &str, decimals: u32) -> Result<String, String> {
+    let amount = amount.trim();
+    let (int_part, frac_part) = if let Some(dot) = amount.find('.') {
+        (&amount[..dot], &amount[dot + 1..])
+    } else {
+        (amount, "")
+    };
+
+    if int_part.is_empty() && frac_part.is_empty() {
+        return Err("empty amount".into());
+    }
+
+    let frac_trimmed = if frac_part.len() > decimals as usize {
+        &frac_part[..decimals as usize]
+    } else {
+        frac_part
+    };
+
+    let frac_padded = format!("{:0<width$}", frac_trimmed, width = decimals as usize);
+    let combined = format!("{}{}", int_part.trim_start_matches('0'), frac_padded);
+    let trimmed = combined.trim_start_matches('0');
+    if trimmed.is_empty() {
+        Ok("0".into())
+    } else {
+        Ok(trimmed.to_string())
+    }
+}
+
+/// Map OWS chain names to LI.FI chain identifiers.
+fn ows_chain_to_lifi(chain: &str) -> &'static str {
+    match chain.to_lowercase().as_str() {
+        "ethereum" | "eth" => "1",
+        "polygon" | "pol" | "matic" => "137",
+        "base" => "8453",
+        "arbitrum" | "arb" => "42161",
+        "optimism" | "op" => "10",
+        "avalanche" | "avax" => "43114",
+        "bsc" | "bnb" => "56",
+        "solana" | "sol" => "1151111081099592",
+        _ => "unknown",
+    }
+}

ows/crates/ows-cli/src/main.rs

@@ -38,6 +38,11 @@ enum Commands {
         #[command(subcommand)]
         subcommand: FundCommands,
     },
+    /// Swap tokens across chains via LI.FI
+    Swap {
+        #[command(subcommand)]
+        subcommand: SwapCommands,
+    },
     /// Pay for x402-enabled API calls
     Pay {
         #[command(subcommand)]
@@ -245,6 +250,37 @@ enum FundCommands {
     },
 }
 
+#[derive(Subcommand)]
+enum SwapCommands {
+    /// Get a swap quote and show route (no signing)
+    Quote {
+        /// Wallet name or ID
+        #[arg(long, env = "OWS_WALLET")]
+        wallet: String,
+        /// Source token (e.g. ETH, USDC)
+        #[arg(long)]
+        from: String,
+        /// Destination token (e.g. USDC, ETH)
+        #[arg(long)]
+        to: String,
+        /// Amount in human-readable format (e.g. 0.1)
+        #[arg(long)]
+        amount: String,
+        /// Source chain (e.g. ethereum, base, arbitrum)
+        #[arg(long, default_value = "ethereum")]
+        from_chain: String,
+        /// Destination chain (e.g. ethereum, base, arbitrum)
+        #[arg(long)]
+        to_chain: Option<String>,
+        /// Max slippage as decimal (default: 0.005)
+        #[arg(long, default_value = "0.005")]
+        slippage: f64,
+        /// Route preference: CHEAPEST or FASTEST
+        #[arg(long, default_value = "CHEAPEST")]
+        order: String,
+    },
+}
+
 #[derive(Subcommand)]
 enum PayCommands {
     /// Make a paid request to an x402-enabled API endpoint
@@ -471,6 +507,27 @@ fn run(cli: Cli) -> Result<(), CliError> {
                 commands::fund::balance(&wallet, Some(&chain))
             }
         },
+        Commands::Swap { subcommand } => match subcommand {
+            SwapCommands::Quote {
+                wallet,
+                from,
+                to,
+                amount,
+                from_chain,
+                to_chain,
+                slippage,
+                order,
+            } => commands::swap::quote(commands::swap::QuoteArgs {
+                wallet_name: &wallet,
+                from_token: &from,
+                to_token: &to,
+                amount: &amount,
+                from_chain: &from_chain,
+                to_chain: to_chain.as_deref(),
+                slippage,
+                order: &order,
+            }),
+        },
         Commands::Pay { subcommand } => match subcommand {
             PayCommands::Request {
                 url,

ows/crates/ows-pay/src/lib.rs

@@ -17,9 +17,11 @@ pub mod types;
 pub mod wallet;
 
 // Protocol implementations (internal).
+pub mod swap;
 mod x402;
 
 pub use error::{PayError, PayErrorCode};
+pub use swap::{swap_dry_run, SwapParams, SwapResult};
 pub use types::{DiscoverResult, PayResult, PaymentInfo, Protocol, Service};
 pub use wallet::{Account, WalletAccess};