fix: mpp (#523)

crates/cdk-cli/src/sub_commands/melt.rs

@@ -3,7 +3,8 @@ use std::io::Write;
 use std::str::FromStr;
 
 use anyhow::{bail, Result};
-use cdk::nuts::CurrencyUnit;
+use cdk::amount::MSAT_IN_SAT;
+use cdk::nuts::{CurrencyUnit, MeltOptions};
 use cdk::wallet::multi_mint_wallet::{MultiMintWallet, WalletKey};
 use cdk::Bolt11Invoice;
 use clap::Args;
@@ -15,6 +16,9 @@ pub struct MeltSubCommand {
     /// Currency unit e.g. sat
     #[arg(default_value = "sat")]
     unit: String,
+    /// Mpp
+    #[arg(short, long)]
+    mpp: bool,
 }
 
 pub async fn pay(
@@ -52,14 +56,33 @@ pub async fn pay(
     stdin.read_line(&mut user_input)?;
     let bolt11 = Bolt11Invoice::from_str(user_input.trim())?;
 
-    if bolt11
+    let mut options: Option<MeltOptions> = None;
+
+    if sub_command_args.mpp {
+        println!("Enter the amount you would like to pay in sats, for a mpp payment.");
+        let mut user_input = String::new();
+        let stdin = io::stdin();
+        io::stdout().flush().unwrap();
+        stdin.read_line(&mut user_input)?;
+
+        let user_amount = user_input.trim_end().parse::<u64>()?;
+
+        if user_amount
+            .gt(&(<cdk::Amount as Into<u64>>::into(mints_amounts[mint_number].1) * MSAT_IN_SAT))
+        {
+            bail!("Not enough funds");
+        }
+
+        options = Some(MeltOptions::new_mpp(user_amount * MSAT_IN_SAT));
+    } else if bolt11
         .amount_milli_satoshis()
         .unwrap()
-        .gt(&(<cdk::Amount as Into<u64>>::into(mints_amounts[mint_number].1) * 1000_u64))
+        .gt(&(<cdk::Amount as Into<u64>>::into(mints_amounts[mint_number].1) * MSAT_IN_SAT))
     {
         bail!("Not enough funds");
     }
-    let quote = wallet.melt_quote(bolt11.to_string(), None).await?;
+
+    let quote = wallet.melt_quote(bolt11.to_string(), options).await?;
 
     println!("{:?}", quote);