X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;f=lightning%2Fsrc%2Futil%2Fser_macros.rs;h=312fe7d9f98424ea2a0ad3dc3231cd765d50e624;hb=3a9fe209e104e048921ad50be77a80b18a98b45c;hp=92a43b3fde5282fb4420d4981c1e23b3d9bd0e81;hpb=2d213a47bffe2f3d9b744fe64e0001d90a4bf8fa;p=rust-lightning diff --git a/lightning/src/util/ser_macros.rs b/lightning/src/util/ser_macros.rs index 92a43b3f..312fe7d9 100644 --- a/lightning/src/util/ser_macros.rs +++ b/lightning/src/util/ser_macros.rs @@ -13,6 +13,21 @@ //! [`Readable`]: crate::util::ser::Readable //! [`Writeable`]: crate::util::ser::Writeable +// There are quite a few TLV serialization "types" which behave differently. We currently only +// publicly document the `optional` and `required` types, not supporting anything else publicly and +// changing them at will. +// +// Some of the other types include: +// * (default_value, $default) - reads optionally, reading $default if no TLV is present +// * (static_value, $value) - ignores any TLVs, always using $value +// * required_vec - reads into a Vec without a length prefix, failing if no TLV is present. +// * optional_vec - reads into an Option without a length prefix, continuing if no TLV is +// present. Writes from a Vec directly, only if any elements are present. Note +// that the struct deserialization macros return a Vec, not an Option. +// * upgradable_option - reads via MaybeReadable. +// * upgradable_required - reads via MaybeReadable, requiring a TLV be present but may return None +// if MaybeReadable::read() returns None. + /// Implements serialization for a single TLV record. /// This is exported for use by other exported macros, do not use directly. #[doc(hidden)] @@ -29,7 +44,7 @@ macro_rules! _encode_tlv { BigSize($field.serialized_length() as u64).write($stream)?; $field.write($stream)?; }; - ($stream: expr, $type: expr, $field: expr, vec_type) => { + ($stream: expr, $type: expr, $field: expr, required_vec) => { $crate::_encode_tlv!($stream, $type, $crate::util::ser::WithoutLength(&$field), required); }; ($stream: expr, $optional_type: expr, $optional_field: expr, option) => { @@ -39,6 +54,11 @@ macro_rules! _encode_tlv { field.write($stream)?; } }; + ($stream: expr, $type: expr, $field: expr, optional_vec) => { + if !$field.is_empty() { + $crate::_encode_tlv!($stream, $type, $field, required_vec); + } + }; ($stream: expr, $type: expr, $field: expr, upgradable_required) => { $crate::_encode_tlv!($stream, $type, $field, required); }; @@ -112,7 +132,20 @@ macro_rules! _check_encoded_tlv_order { /// [`Writer`]: crate::util::ser::Writer #[macro_export] macro_rules! encode_tlv_stream { + ($stream: expr, {$(($type: expr, $field: expr, $fieldty: tt)),* $(,)*}) => { + $crate::_encode_tlv_stream!($stream, {$(($type, $field, $fieldty)),*}) + } +} + +/// Implementation of [`encode_tlv_stream`]. +/// This is exported for use by other exported macros, do not use directly. +#[doc(hidden)] +#[macro_export] +macro_rules! _encode_tlv_stream { ($stream: expr, {$(($type: expr, $field: expr, $fieldty: tt)),* $(,)*}) => { { + $crate::_encode_tlv_stream!($stream, { $(($type, $field, $fieldty)),* }, &[]) + } }; + ($stream: expr, {$(($type: expr, $field: expr, $fieldty: tt)),* $(,)*}, $extra_tlvs: expr) => { { #[allow(unused_imports)] use $crate::{ ln::msgs::DecodeError, @@ -124,6 +157,10 @@ macro_rules! encode_tlv_stream { $( $crate::_encode_tlv!($stream, $type, $field, $fieldty); )* + for tlv in $extra_tlvs { + let (typ, value): &(u64, Vec) = tlv; + $crate::_encode_tlv!($stream, *typ, *value, required_vec); + } #[allow(unused_mut, unused_variables, unused_assignments)] #[cfg(debug_assertions)] @@ -132,8 +169,12 @@ macro_rules! encode_tlv_stream { $( $crate::_check_encoded_tlv_order!(last_seen, $type, $fieldty); )* + for tlv in $extra_tlvs { + let (typ, _): &(u64, Vec) = tlv; + $crate::_check_encoded_tlv_order!(last_seen, *typ, required_vec); + } } - } } + } }; } /// Adds the length of the serialized field to a [`LengthCalculatingWriter`]. @@ -154,7 +195,7 @@ macro_rules! _get_varint_length_prefixed_tlv_length { BigSize(field_len as u64).write(&mut $len).expect("No in-memory data may fail to serialize"); $len.0 += field_len; }; - ($len: expr, $type: expr, $field: expr, vec_type) => { + ($len: expr, $type: expr, $field: expr, required_vec) => { $crate::_get_varint_length_prefixed_tlv_length!($len, $type, $crate::util::ser::WithoutLength(&$field), required); }; ($len: expr, $optional_type: expr, $optional_field: expr, option) => { @@ -165,9 +206,17 @@ macro_rules! _get_varint_length_prefixed_tlv_length { $len.0 += field_len; } }; + ($len: expr, $type: expr, $field: expr, optional_vec) => { + if !$field.is_empty() { + $crate::_get_varint_length_prefixed_tlv_length!($len, $type, $field, required_vec); + } + }; ($len: expr, $type: expr, $field: expr, (option: $trait: ident $(, $read_arg: expr)?)) => { $crate::_get_varint_length_prefixed_tlv_length!($len, $type, $field, option); }; + ($len: expr, $type: expr, $field: expr, (option, encoding: ($fieldty: ty, $encoding: ident))) => { + $crate::_get_varint_length_prefixed_tlv_length!($len, $type, $field.map(|f| $encoding(f)), option); + }; ($len: expr, $type: expr, $field: expr, upgradable_required) => { $crate::_get_varint_length_prefixed_tlv_length!($len, $type, $field, required); }; @@ -182,18 +231,27 @@ macro_rules! _get_varint_length_prefixed_tlv_length { #[macro_export] macro_rules! _encode_varint_length_prefixed_tlv { ($stream: expr, {$(($type: expr, $field: expr, $fieldty: tt)),*}) => { { + $crate::_encode_varint_length_prefixed_tlv!($stream, {$(($type, $field, $fieldty)),*}, &[]) + } }; + ($stream: expr, {$(($type: expr, $field: expr, $fieldty: tt)),*}, $extra_tlvs: expr) => { { + extern crate alloc; use $crate::util::ser::BigSize; + use alloc::vec::Vec; let len = { #[allow(unused_mut)] let mut len = $crate::util::ser::LengthCalculatingWriter(0); $( $crate::_get_varint_length_prefixed_tlv_length!(len, $type, $field, $fieldty); )* + for tlv in $extra_tlvs { + let (typ, value): &(u64, Vec) = tlv; + $crate::_get_varint_length_prefixed_tlv_length!(len, *typ, *value, required_vec); + } len.0 }; BigSize(len as u64).write($stream)?; - $crate::encode_tlv_stream!($stream, { $(($type, $field, $fieldty)),* }); - } } + $crate::_encode_tlv_stream!($stream, { $(($type, $field, $fieldty)),* }, $extra_tlvs); + } }; } /// Errors if there are missing required TLV types between the last seen type and the type currently being processed. @@ -223,7 +281,10 @@ macro_rules! _check_decoded_tlv_order { ($last_seen_type: expr, $typ: expr, $type: expr, $field: ident, option) => {{ // no-op }}; - ($last_seen_type: expr, $typ: expr, $type: expr, $field: ident, vec_type) => {{ + ($last_seen_type: expr, $typ: expr, $type: expr, $field: ident, required_vec) => {{ + $crate::_check_decoded_tlv_order!($last_seen_type, $typ, $type, $field, required); + }}; + ($last_seen_type: expr, $typ: expr, $type: expr, $field: ident, optional_vec) => {{ // no-op }}; ($last_seen_type: expr, $typ: expr, $type: expr, $field: ident, upgradable_required) => {{ @@ -265,12 +326,15 @@ macro_rules! _check_missing_tlv { ($last_seen_type: expr, $type: expr, $field: ident, (required: $trait: ident $(, $read_arg: expr)?)) => {{ $crate::_check_missing_tlv!($last_seen_type, $type, $field, required); }}; - ($last_seen_type: expr, $type: expr, $field: ident, vec_type) => {{ - // no-op + ($last_seen_type: expr, $type: expr, $field: ident, required_vec) => {{ + $crate::_check_missing_tlv!($last_seen_type, $type, $field, required); }}; ($last_seen_type: expr, $type: expr, $field: ident, option) => {{ // no-op }}; + ($last_seen_type: expr, $type: expr, $field: ident, optional_vec) => {{ + // no-op + }}; ($last_seen_type: expr, $type: expr, $field: ident, upgradable_required) => {{ _check_missing_tlv!($last_seen_type, $type, $field, required) }}; @@ -301,13 +365,17 @@ macro_rules! _decode_tlv { ($reader: expr, $field: ident, (required: $trait: ident $(, $read_arg: expr)?)) => {{ $field = $trait::read(&mut $reader $(, $read_arg)*)?; }}; - ($reader: expr, $field: ident, vec_type) => {{ + ($reader: expr, $field: ident, required_vec) => {{ let f: $crate::util::ser::WithoutLength> = $crate::util::ser::Readable::read(&mut $reader)?; - $field = Some(f.0); + $field = f.0; }}; ($reader: expr, $field: ident, option) => {{ $field = Some($crate::util::ser::Readable::read(&mut $reader)?); }}; + ($reader: expr, $field: ident, optional_vec) => {{ + let f: $crate::util::ser::WithoutLength> = $crate::util::ser::Readable::read(&mut $reader)?; + $field = Some(f.0); + }}; // `upgradable_required` indicates we're reading a required TLV that may have been upgraded // without backwards compat. We'll error if the field is missing, and return `Ok(None)` if the // field is present but we can no longer understand it. @@ -535,7 +603,7 @@ macro_rules! impl_writeable_msg { impl $crate::util::ser::Writeable for $st { fn write(&self, w: &mut W) -> Result<(), $crate::io::Error> { $( self.$field.write(w)?; )* - $crate::encode_tlv_stream!(w, {$(($type, self.$tlvfield, $fieldty)),*}); + $crate::encode_tlv_stream!(w, {$(($type, self.$tlvfield.as_ref(), $fieldty)),*}); Ok(()) } } @@ -672,7 +740,10 @@ macro_rules! _init_tlv_based_struct_field { ($field: ident, required) => { $field.0.unwrap() }; - ($field: ident, vec_type) => { + ($field: ident, required_vec) => { + $field + }; + ($field: ident, optional_vec) => { $field.unwrap() }; } @@ -695,12 +766,18 @@ macro_rules! _init_tlv_field_var { ($field: ident, (required: $trait: ident $(, $read_arg: expr)?)) => { $crate::_init_tlv_field_var!($field, required); }; - ($field: ident, vec_type) => { - let mut $field = Some(Vec::new()); + ($field: ident, required_vec) => { + let mut $field = Vec::new(); }; ($field: ident, option) => { let mut $field = None; }; + ($field: ident, optional_vec) => { + let mut $field = Some(Vec::new()); + }; + ($field: ident, (option, encoding: ($fieldty: ty, $encoding: ident))) => { + $crate::_init_tlv_field_var!($field, option); + }; ($field: ident, (option: $trait: ident $(, $read_arg: expr)?)) => { $crate::_init_tlv_field_var!($field, option); }; @@ -714,10 +791,13 @@ macro_rules! _init_tlv_field_var { /// Equivalent to running [`_init_tlv_field_var`] then [`read_tlv_fields`]. /// +/// If any unused values are read, their type MUST be specified or else `rustc` will read them as an +/// `i64`. +/// /// This is exported for use by other exported macros, do not use directly. #[doc(hidden)] #[macro_export] -macro_rules! _init_and_read_tlv_fields { +macro_rules! _init_and_read_len_prefixed_tlv_fields { ($reader: ident, {$(($type: expr, $field: ident, $fieldty: tt)),* $(,)*}) => { $( $crate::_init_tlv_field_var!($field, $fieldty); @@ -729,11 +809,28 @@ macro_rules! _init_and_read_tlv_fields { } } +/// Equivalent to running [`_init_tlv_field_var`] then [`decode_tlv_stream`]. +/// +/// If any unused values are read, their type MUST be specified or else `rustc` will read them as an +/// `i64`. +macro_rules! _init_and_read_tlv_stream { + ($reader: ident, {$(($type: expr, $field: ident, $fieldty: tt)),* $(,)*}) => { + $( + $crate::_init_tlv_field_var!($field, $fieldty); + )* + + $crate::decode_tlv_stream!($reader, { + $(($type, $field, $fieldty)),* + }); + } +} + /// Implements [`Readable`]/[`Writeable`] for a struct storing it as a set of TLVs /// If `$fieldty` is `required`, then `$field` is a required field that is not an [`Option`] nor a [`Vec`]. /// If `$fieldty` is `(default_value, $default)`, then `$field` will be set to `$default` if not present. /// If `$fieldty` is `option`, then `$field` is optional field. -/// If `$fieldty` is `vec_type`, then `$field` is a [`Vec`], which needs to have its individual elements serialized. +/// If `$fieldty` is `optional_vec`, then `$field` is a [`Vec`], which needs to have its individual elements serialized. +/// Note that for `optional_vec` no bytes are written if the vec is empty /// /// For example, /// ``` @@ -749,7 +846,7 @@ macro_rules! _init_and_read_tlv_fields { /// (0, tlv_integer, required), /// (1, tlv_default_integer, (default_value, 7)), /// (2, tlv_optional_integer, option), -/// (3, tlv_vec_type_integer, vec_type), +/// (3, tlv_vec_type_integer, optional_vec), /// }); /// ``` /// @@ -785,7 +882,7 @@ macro_rules! impl_writeable_tlv_based { impl $crate::util::ser::Readable for $st { fn read(reader: &mut R) -> Result { - $crate::_init_and_read_tlv_fields!(reader, { + $crate::_init_and_read_len_prefixed_tlv_fields!(reader, { $(($type, $field, $fieldty)),* }); Ok(Self { @@ -820,7 +917,7 @@ macro_rules! tlv_stream { #[cfg_attr(test, derive(PartialEq))] #[derive(Debug)] - pub(super) struct $nameref<'a> { + pub(crate) struct $nameref<'a> { $( pub(super) $field: Option, )* @@ -909,7 +1006,7 @@ macro_rules! _impl_writeable_tlv_based_enum_common { /// ```ignore /// impl_writeable_tlv_based_enum!(EnumName, /// (0, StructVariantA) => {(0, required_variant_field, required), (1, optional_variant_field, option)}, -/// (1, StructVariantB) => {(0, variant_field_a, required), (1, variant_field_b, required), (2, variant_vec_field, vec_type)}; +/// (1, StructVariantB) => {(0, variant_field_a, required), (1, variant_field_b, required), (2, variant_vec_field, optional_vec)}; /// (2, TupleVariantA), (3, TupleVariantB), /// ); /// ``` @@ -936,8 +1033,8 @@ macro_rules! impl_writeable_tlv_based_enum { $($variant_id => { // Because read_tlv_fields creates a labeled loop, we cannot call it twice // in the same function body. Instead, we define a closure and call it. - let f = || { - $crate::_init_and_read_tlv_fields!(reader, { + let mut f = || { + $crate::_init_and_read_len_prefixed_tlv_fields!(reader, { $(($type, $field, $fieldty)),* }); Ok($st::$variant_name { @@ -949,7 +1046,7 @@ macro_rules! impl_writeable_tlv_based_enum { f() }),* $($tuple_variant_id => { - Ok($st::$tuple_variant_name(Readable::read(reader)?)) + Ok($st::$tuple_variant_name($crate::util::ser::Readable::read(reader)?)) }),* _ => { Err($crate::ln::msgs::DecodeError::UnknownRequiredFeature) @@ -990,8 +1087,8 @@ macro_rules! impl_writeable_tlv_based_enum_upgradable { $($variant_id => { // Because read_tlv_fields creates a labeled loop, we cannot call it twice // in the same function body. Instead, we define a closure and call it. - let f = || { - $crate::_init_and_read_tlv_fields!(reader, { + let mut f = || { + $crate::_init_and_read_len_prefixed_tlv_fields!(reader, { $(($type, $field, $fieldty)),* }); Ok(Some($st::$variant_name { @@ -1015,10 +1112,13 @@ macro_rules! impl_writeable_tlv_based_enum_upgradable { #[cfg(test)] mod tests { - use crate::io::{self, Cursor}; + #[allow(unused_imports)] use crate::prelude::*; + + use crate::io::{self, Cursor}; use crate::ln::msgs::DecodeError; use crate::util::ser::{Writeable, HighZeroBytesDroppedBigSize, VecWriter}; + use bitcoin::hashes::hex::FromHex; use bitcoin::secp256k1::PublicKey; // The BOLT TLV test cases don't include any tests which use our "required-value" logic since @@ -1036,7 +1136,7 @@ mod tests { #[test] fn tlv_v_short_read() { // We only expect a u32 for type 3 (which we are given), but the L says its 8 bytes. - if let Err(DecodeError::ShortRead) = tlv_reader(&::hex::decode( + if let Err(DecodeError::ShortRead) = tlv_reader(&>::from_hex( concat!("0100", "0208deadbeef1badbeef", "0308deadbeef") ).unwrap()[..]) { } else { panic!(); } @@ -1044,12 +1144,12 @@ mod tests { #[test] fn tlv_types_out_of_order() { - if let Err(DecodeError::InvalidValue) = tlv_reader(&::hex::decode( + if let Err(DecodeError::InvalidValue) = tlv_reader(&>::from_hex( concat!("0100", "0304deadbeef", "0208deadbeef1badbeef") ).unwrap()[..]) { } else { panic!(); } // ...even if its some field we don't understand - if let Err(DecodeError::InvalidValue) = tlv_reader(&::hex::decode( + if let Err(DecodeError::InvalidValue) = tlv_reader(&>::from_hex( concat!("0208deadbeef1badbeef", "0100", "0304deadbeef") ).unwrap()[..]) { } else { panic!(); } @@ -1058,17 +1158,17 @@ mod tests { #[test] fn tlv_req_type_missing_or_extra() { // It's also bad if they included even fields we don't understand - if let Err(DecodeError::UnknownRequiredFeature) = tlv_reader(&::hex::decode( + if let Err(DecodeError::UnknownRequiredFeature) = tlv_reader(&>::from_hex( concat!("0100", "0208deadbeef1badbeef", "0304deadbeef", "0600") ).unwrap()[..]) { } else { panic!(); } // ... or if they're missing fields we need - if let Err(DecodeError::InvalidValue) = tlv_reader(&::hex::decode( + if let Err(DecodeError::InvalidValue) = tlv_reader(&>::from_hex( concat!("0100", "0208deadbeef1badbeef") ).unwrap()[..]) { } else { panic!(); } // ... even if that field is even - if let Err(DecodeError::InvalidValue) = tlv_reader(&::hex::decode( + if let Err(DecodeError::InvalidValue) = tlv_reader(&>::from_hex( concat!("0304deadbeef", "0500") ).unwrap()[..]) { } else { panic!(); } @@ -1076,11 +1176,11 @@ mod tests { #[test] fn tlv_simple_good_cases() { - assert_eq!(tlv_reader(&::hex::decode( + assert_eq!(tlv_reader(&>::from_hex( concat!("0208deadbeef1badbeef", "03041bad1dea") ).unwrap()[..]).unwrap(), (0xdeadbeef1badbeef, 0x1bad1dea, None)); - assert_eq!(tlv_reader(&::hex::decode( + assert_eq!(tlv_reader(&>::from_hex( concat!("0208deadbeef1badbeef", "03041bad1dea", "040401020304") ).unwrap()[..]).unwrap(), (0xdeadbeef1badbeef, 0x1bad1dea, Some(0x01020304))); @@ -1104,12 +1204,12 @@ mod tests { #[test] fn upgradable_tlv_simple_good_cases() { - assert_eq!(upgradable_tlv_reader(&::hex::decode( + assert_eq!(upgradable_tlv_reader(&>::from_hex( concat!("0204deadbeef", "03041bad1dea", "0404deadbeef") ).unwrap()[..]).unwrap(), Some(TestUpgradable { a: 0xdeadbeef, b: 0x1bad1dea, c: Some(0xdeadbeef) })); - assert_eq!(upgradable_tlv_reader(&::hex::decode( + assert_eq!(upgradable_tlv_reader(&>::from_hex( concat!("0204deadbeef", "03041bad1dea") ).unwrap()[..]).unwrap(), Some(TestUpgradable { a: 0xdeadbeef, b: 0x1bad1dea, c: None})); @@ -1117,11 +1217,11 @@ mod tests { #[test] fn missing_required_upgradable() { - if let Err(DecodeError::InvalidValue) = upgradable_tlv_reader(&::hex::decode( + if let Err(DecodeError::InvalidValue) = upgradable_tlv_reader(&>::from_hex( concat!("0100", "0204deadbeef") ).unwrap()[..]) { } else { panic!(); } - if let Err(DecodeError::InvalidValue) = upgradable_tlv_reader(&::hex::decode( + if let Err(DecodeError::InvalidValue) = upgradable_tlv_reader(&>::from_hex( concat!("0100", "03041bad1dea") ).unwrap()[..]) { } else { panic!(); } @@ -1142,7 +1242,7 @@ mod tests { fn bolt_tlv_bogus_stream() { macro_rules! do_test { ($stream: expr, $reason: ident) => { - if let Err(DecodeError::$reason) = tlv_reader_n1(&::hex::decode($stream).unwrap()[..]) { + if let Err(DecodeError::$reason) = tlv_reader_n1(&>::from_hex($stream).unwrap()[..]) { } else { panic!(); } } } @@ -1167,7 +1267,7 @@ mod tests { fn bolt_tlv_bogus_n1_stream() { macro_rules! do_test { ($stream: expr, $reason: ident) => { - if let Err(DecodeError::$reason) = tlv_reader_n1(&::hex::decode($stream).unwrap()[..]) { + if let Err(DecodeError::$reason) = tlv_reader_n1(&>::from_hex($stream).unwrap()[..]) { } else { panic!(); } } } @@ -1207,7 +1307,7 @@ mod tests { fn bolt_tlv_valid_n1_stream() { macro_rules! do_test { ($stream: expr, $tlv1: expr, $tlv2: expr, $tlv3: expr, $tlv4: expr) => { - if let Ok((tlv1, tlv2, tlv3, tlv4)) = tlv_reader_n1(&::hex::decode($stream).unwrap()[..]) { + if let Ok((tlv1, tlv2, tlv3, tlv4)) = tlv_reader_n1(&>::from_hex($stream).unwrap()[..]) { assert_eq!(tlv1.map(|v| v.0), $tlv1); assert_eq!(tlv2, $tlv2); assert_eq!(tlv3, $tlv3); @@ -1236,7 +1336,7 @@ mod tests { do_test!(concat!("02", "08", "0000000000000226"), None, Some((0 << 30) | (0 << 5) | (550 << 0)), None, None); do_test!(concat!("03", "31", "023da092f6980e58d2c037173180e9a465476026ee50f96695963e8efe436f54eb00000000000000010000000000000002"), None, None, Some(( - PublicKey::from_slice(&::hex::decode("023da092f6980e58d2c037173180e9a465476026ee50f96695963e8efe436f54eb").unwrap()[..]).unwrap(), 1, 2)), + PublicKey::from_slice(&>::from_hex("023da092f6980e58d2c037173180e9a465476026ee50f96695963e8efe436f54eb").unwrap()[..]).unwrap(), 1, 2)), None); do_test!(concat!("fd00fe", "02", "0226"), None, None, None, Some(550)); } @@ -1246,27 +1346,27 @@ mod tests { stream.0.clear(); _encode_varint_length_prefixed_tlv!(&mut stream, {(1, 1u8, required), (42, None::, option)}); - assert_eq!(stream.0, ::hex::decode("03010101").unwrap()); + assert_eq!(stream.0, >::from_hex("03010101").unwrap()); stream.0.clear(); _encode_varint_length_prefixed_tlv!(&mut stream, {(1, Some(1u8), option)}); - assert_eq!(stream.0, ::hex::decode("03010101").unwrap()); + assert_eq!(stream.0, >::from_hex("03010101").unwrap()); stream.0.clear(); _encode_varint_length_prefixed_tlv!(&mut stream, {(4, 0xabcdu16, required), (42, None::, option)}); - assert_eq!(stream.0, ::hex::decode("040402abcd").unwrap()); + assert_eq!(stream.0, >::from_hex("040402abcd").unwrap()); stream.0.clear(); _encode_varint_length_prefixed_tlv!(&mut stream, {(42, None::, option), (0xff, 0xabcdu16, required)}); - assert_eq!(stream.0, ::hex::decode("06fd00ff02abcd").unwrap()); + assert_eq!(stream.0, >::from_hex("06fd00ff02abcd").unwrap()); stream.0.clear(); _encode_varint_length_prefixed_tlv!(&mut stream, {(0, 1u64, required), (42, None::, option), (0xff, HighZeroBytesDroppedBigSize(0u64), required)}); - assert_eq!(stream.0, ::hex::decode("0e00080000000000000001fd00ff00").unwrap()); + assert_eq!(stream.0, >::from_hex("0e00080000000000000001fd00ff00").unwrap()); stream.0.clear(); _encode_varint_length_prefixed_tlv!(&mut stream, {(0, Some(1u64), option), (0xff, HighZeroBytesDroppedBigSize(0u64), required)}); - assert_eq!(stream.0, ::hex::decode("0e00080000000000000001fd00ff00").unwrap()); + assert_eq!(stream.0, >::from_hex("0e00080000000000000001fd00ff00").unwrap()); Ok(()) }