Rewrite Invoice's interface in terms of msats

InvoiceBuilder's interface was changed recently to work in terms of
msats. Update Invoice's interface to return the amount in msats, too,
and make amount_pico_btc private.

diff --git a/lightning-invoice/src/lib.rs b/lightning-invoice/src/lib.rs
index 0f125362c3a1877e0fdc7e1d07c5500e95e48be4..f81af8623647c872613a52bd7e5984cf463341a6 100644 (file)
--- a/lightning-invoice/src/lib.rs
+++ b/lightning-invoice/src/lib.rs
@@ -1219,8 +1219,13 @@ impl Invoice {
                self.signed_invoice.currency()
        }
 
+       /// Returns the amount if specified in the invoice as millisatoshis.
+       pub fn amount_milli_satoshis(&self) -> Option<u64> {
+               self.signed_invoice.amount_pico_btc().map(|v| v / 10)
+       }
+
        /// Returns the amount if specified in the invoice as pico <currency>.
-       pub fn amount_pico_btc(&self) -> Option<u64> {
+       fn amount_pico_btc(&self) -> Option<u64> {
                self.signed_invoice.amount_pico_btc()
        }
 }
@@ -1867,6 +1872,7 @@ mod test {
                assert!(invoice.check_signature().is_ok());
                assert_eq!(invoice.tagged_fields().count(), 10);
 
+               assert_eq!(invoice.amount_milli_satoshis(), Some(123));
                assert_eq!(invoice.amount_pico_btc(), Some(1230));
                assert_eq!(invoice.currency(), Currency::BitcoinTestnet);
                assert_eq!(