Use alloc for no_std builds

[rust-lightning] / lightning / src / ln / features.rs

diff --git a/lightning/src/ln/features.rs b/lightning/src/ln/features.rs
index 0b01c41690efd795ebf107f5db4dd80e76783f0c..b459baf06580bff8414715b82c1845e7334c23ee 100644 (file)
--- a/lightning/src/ln/features.rs
+++ b/lightning/src/ln/features.rs
@@ -22,8 +22,9 @@
 //! [BOLT #9]: https://github.com/lightningnetwork/lightning-rfc/blob/master/09-features.md
 //! [messages]: crate::ln::msgs
 
-use std::{cmp, fmt};
-use std::marker::PhantomData;
+use prelude::*;
+use core::{cmp, fmt};
+use core::marker::PhantomData;
 
 use bitcoin::bech32;
 use bitcoin::bech32::{Base32Len, FromBase32, ToBase32, u5, WriteBase32};
@@ -31,6 +32,7 @@ use ln::msgs::DecodeError;
 use util::ser::{Readable, Writeable, Writer};
 
 mod sealed {
+       use prelude::*;
        use ln::features::Features;
 
        /// The context in which [`Features`] are applicable. Defines which features are required and
@@ -646,11 +648,8 @@ impl<T: sealed::PaymentSecret> Features<T> {
        pub(crate) fn requires_payment_secret(&self) -> bool {
                <T as sealed::PaymentSecret>::requires_feature(&self.flags)
        }
-       // Note that we never need to test this since what really matters is the invoice - iff the
-       // invoice provides a payment_secret, we assume that we can use it (ie that the recipient
-       // supports payment_secret).
-       #[allow(dead_code)]
-       pub(crate) fn supports_payment_secret(&self) -> bool {
+       /// Returns whether the `payment_secret` feature is supported.
+       pub fn supports_payment_secret(&self) -> bool {
                <T as sealed::PaymentSecret>::supports_feature(&self.flags)
        }
 }