+use core::convert::TryInto; // Bindings need at least rustc 1.34
+use core::ffi::c_void;
+
+#[cfg(feature = "std")]
+pub(crate) use std::io::{self, Cursor, Read};
+#[cfg(feature = "no-std")]
+pub(crate) use core2::io::{self, Cursor, Read};
+#[cfg(feature = "no-std")]
+use alloc::{boxed::Box, vec::Vec, string::String};
+
+use core::convert::TryFrom;
+
+#[repr(C)]
+/// A dummy struct of which an instance must never exist.
+/// This corresponds to the Rust type `Infallible`, or, in unstable rust, `!`
+pub struct NotConstructable {
+ _priv_thing: core::convert::Infallible,
+}
+impl From<core::convert::Infallible> for NotConstructable {
+ fn from(_: core::convert::Infallible) -> Self { unreachable!(); }
+}
+
+/// Integer in the range `0..32`
+#[derive(PartialEq, Eq, Copy, Clone)]
+#[allow(non_camel_case_types)]
+#[repr(C)]
+pub struct U5(u8);
+
+impl From<bech32::u5> for U5 {
+ fn from(o: bech32::u5) -> Self { Self(o.to_u8()) }
+}
+impl Into<bech32::u5> for U5 {
+ fn into(self) -> bech32::u5 { bech32::u5::try_from_u8(self.0).expect("u5 objects must be in the range 0..32") }
+}
+
+/// Unsigned, 128-bit integer.
+///
+/// Because LLVM implements an incorrect ABI for 128-bit integers, a wrapper type is defined here.
+/// See https://github.com/rust-lang/rust/issues/54341 for more details.
+#[derive(PartialEq, Eq, Copy, Clone)]
+#[allow(non_camel_case_types)]
+#[repr(C)]
+pub struct U128 {
+ /// The 128-bit integer, as 16 little-endian bytes
+ pub le_bytes: [u8; 16],
+}
+
+#[no_mangle]
+/// Gets the 128-bit integer, as 16 little-endian bytes
+pub extern "C" fn U128_le_bytes(val: U128) -> SixteenBytes { SixteenBytes { data: val.le_bytes } }
+#[no_mangle]
+/// Constructs a new U128 from 16 little-endian bytes
+pub extern "C" fn U128_new(le_bytes: SixteenBytes) -> U128 { U128 { le_bytes: le_bytes.data } }
+
+impl From<u128> for U128 {
+ fn from(o: u128) -> Self { Self { le_bytes: o.to_le_bytes() } }
+}
+impl From<&mut u128> for U128 {
+ fn from(o: &mut u128) -> U128 { Self::from(*o) }
+}
+impl Into<u128> for U128 {
+ fn into(self) -> u128 { u128::from_le_bytes(self.le_bytes) }
+}
+
+/// Integer in the range `0..=16`
+#[derive(PartialEq, Eq, Copy, Clone)]
+#[repr(C)]
+pub struct WitnessVersion(u8);
+
+impl From<address::WitnessVersion> for WitnessVersion {
+ fn from(o: address::WitnessVersion) -> Self { Self(o.to_num()) }
+}
+impl Into<address::WitnessVersion> for WitnessVersion {
+ fn into(self) -> address::WitnessVersion {
+ address::WitnessVersion::try_from(self.0).expect("WitnessVersion objects must be in the range 0..=16")
+ }
+}