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Cleanup payload types (#3675)

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* Add transparent support

* Add `Config` struct

* Deprecate `enum_behaviour`

* Partially remove enum_behaviour from project

* Revert "Partially remove enum_behaviour from project"

This reverts commit 46ffb7fe77.

* Revert "Deprecate `enum_behaviour`"

This reverts commit 89b64a6f53.

* Add `struct_behaviour`

* Tidy

* Move tests into `ssz_derive`

* Bump ssz derive

* Fix comment

* newtype transaparent ssz

* use ssz transparent and create macros for  per fork implementations

* use superstruct map macros

Co-authored-by: Paul Hauner <paul@paulhauner.com>
This commit is contained in:
realbigsean
2022-11-02 10:30:41 -04:00
committed by GitHub
parent d8a49aad2b
commit c45b809b76
25 changed files with 990 additions and 1069 deletions
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5
consensus/ssz_derive/Cargo.toml
View File

@@ -1,6 +1,6 @@
[package]
name = "eth2_ssz_derive"
version = "0.3.0"
version = "0.3.1"
authors = ["Paul Hauner <paul@sigmaprime.io>"]
edition = "2021"
description = "Procedural derive macros to accompany the eth2_ssz crate."
@@ -15,3 +15,6 @@ syn = "1.0.42"
proc-macro2 = "1.0.23"
quote = "1.0.7"
darling = "0.13.0"
[dev-dependencies]
eth2_ssz = "0.4.1"

460
consensus/ssz_derive/src/lib.rs
View File

@@ -1,7 +1,147 @@
#![recursion_limit = "256"]
//! Provides procedural derive macros for the `Encode` and `Decode` traits of the `eth2_ssz` crate.
//!
//! Supports field attributes, see each derive macro for more information.
//! ## Attributes
//!
//! The following struct/enum attributes are available:
//!
//! - `#[ssz(enum_behaviour = "union")]`: encodes and decodes an `enum` with a one-byte variant selector.
//! - `#[ssz(enum_behaviour = "transparent")]`: allows encoding an `enum` by serializing only the
//! value whilst ignoring outermost the `enum`.
//! - `#[ssz(struct_behaviour = "container")]`: encodes and decodes the `struct` as an SSZ
//! "container".
//! - `#[ssz(struct_behaviour = "transparent")]`: encodes and decodes a `struct` with exactly one
//! non-skipped field as if the outermost `struct` does not exist.
//!
//! The following field attributes are available:
//!
//! - `#[ssz(with = "module")]`: uses the methods in `module` to implement `ssz::Encode` and
//! `ssz::Decode`. This is useful when it's not possible to create an `impl` for that type
//! (e.g. the type is defined in another crate).
//! - `#[ssz(skip_serializing)]`: this field will not be included in the serialized SSZ vector.
//! - `#[ssz(skip_deserializing)]`: this field will not be expected in the serialized
//! SSZ vector and it will be initialized from a `Default` implementation.
//!
//! ## Examples
//!
//! ### Structs
//!
//! ```rust
//! use ssz::{Encode, Decode};
//! use ssz_derive::{Encode, Decode};
//!
//! /// Represented as an SSZ "list" wrapped in an SSZ "container".
//! #[derive(Debug, PartialEq, Encode, Decode)]
//! #[ssz(struct_behaviour = "container")] // "container" is the default behaviour
//! struct TypicalStruct {
//! foo: Vec<u8>
//! }
//!
//! assert_eq!(
//! TypicalStruct { foo: vec![42] }.as_ssz_bytes(),
//! vec![4, 0, 0, 0, 42]
//! );
//!
//! assert_eq!(
//! TypicalStruct::from_ssz_bytes(&[4, 0, 0, 0, 42]).unwrap(),
//! TypicalStruct { foo: vec![42] },
//! );
//!
//! /// Represented as an SSZ "list" *without* an SSZ "container".
//! #[derive(Encode, Decode)]
//! #[ssz(struct_behaviour = "transparent")]
//! struct WrapperStruct {
//! foo: Vec<u8>
//! }
//!
//! assert_eq!(
//! WrapperStruct { foo: vec![42] }.as_ssz_bytes(),
//! vec![42]
//! );
//!
//! /// Represented as an SSZ "list" *without* an SSZ "container". The `bar` byte is ignored.
//! #[derive(Debug, PartialEq, Encode, Decode)]
//! #[ssz(struct_behaviour = "transparent")]
//! struct WrapperStructSkippedField {
//! foo: Vec<u8>,
//! #[ssz(skip_serializing, skip_deserializing)]
//! bar: u8,
//! }
//!
//! assert_eq!(
//! WrapperStructSkippedField { foo: vec![42], bar: 99 }.as_ssz_bytes(),
//! vec![42]
//! );
//! assert_eq!(
//! WrapperStructSkippedField::from_ssz_bytes(&[42]).unwrap(),
//! WrapperStructSkippedField { foo: vec![42], bar: 0 }
//! );
//!
//! /// Represented as an SSZ "list" *without* an SSZ "container".
//! #[derive(Encode, Decode)]
//! #[ssz(struct_behaviour = "transparent")]
//! struct NewType(Vec<u8>);
//!
//! assert_eq!(
//! NewType(vec![42]).as_ssz_bytes(),
//! vec![42]
//! );
//!
//! /// Represented as an SSZ "list" *without* an SSZ "container". The `bar` byte is ignored.
//! #[derive(Debug, PartialEq, Encode, Decode)]
//! #[ssz(struct_behaviour = "transparent")]
//! struct NewTypeSkippedField(Vec<u8>, #[ssz(skip_serializing, skip_deserializing)] u8);
//!
//! assert_eq!(
//! NewTypeSkippedField(vec![42], 99).as_ssz_bytes(),
//! vec![42]
//! );
//! assert_eq!(
//! NewTypeSkippedField::from_ssz_bytes(&[42]).unwrap(),
//! NewTypeSkippedField(vec![42], 0)
//! );
//! ```
//!
//! ### Enums
//!
//! ```rust
//! use ssz::{Encode, Decode};
//! use ssz_derive::{Encode, Decode};
//!
//! /// Represented as an SSZ "union".
//! #[derive(Debug, PartialEq, Encode, Decode)]
//! #[ssz(enum_behaviour = "union")]
//! enum UnionEnum {
//! Foo(u8),
//! Bar(Vec<u8>),
//! }
//!
//! assert_eq!(
//! UnionEnum::Foo(42).as_ssz_bytes(),
//! vec![0, 42]
//! );
//! assert_eq!(
//! UnionEnum::from_ssz_bytes(&[1, 42, 42]).unwrap(),
//! UnionEnum::Bar(vec![42, 42]),
//! );
//!
//! /// Represented as only the value in the enum variant.
//! #[derive(Debug, PartialEq, Encode)]
//! #[ssz(enum_behaviour = "transparent")]
//! enum TransparentEnum {
//! Foo(u8),
//! Bar(Vec<u8>),
//! }
//!
//! assert_eq!(
//! TransparentEnum::Foo(42).as_ssz_bytes(),
//! vec![42]
//! );
//! assert_eq!(
//! TransparentEnum::Bar(vec![42, 42]).as_ssz_bytes(),
//! vec![42, 42]
//! );
//! ```
use darling::{FromDeriveInput, FromMeta};
use proc_macro::TokenStream;
@@ -13,11 +153,18 @@ use syn::{parse_macro_input, DataEnum, DataStruct, DeriveInput, Ident};
/// extensions).
const MAX_UNION_SELECTOR: u8 = 127;
const ENUM_TRANSPARENT: &str = "transparent";
const ENUM_UNION: &str = "union";
const NO_ENUM_BEHAVIOUR_ERROR: &str = "enums require an \"enum_behaviour\" attribute with \
a \"transparent\" or \"union\" value, e.g., #[ssz(enum_behaviour = \"transparent\")]";
#[derive(Debug, FromDeriveInput)]
#[darling(attributes(ssz))]
struct StructOpts {
#[darling(default)]
enum_behaviour: Option<String>,
#[darling(default)]
struct_behaviour: Option<String>,
}
/// Field-level configuration.
@@ -31,40 +178,87 @@ struct FieldOpts {
skip_deserializing: bool,
}
const ENUM_TRANSPARENT: &str = "transparent";
const ENUM_UNION: &str = "union";
const ENUM_VARIANTS: &[&str] = &[ENUM_TRANSPARENT, ENUM_UNION];
const NO_ENUM_BEHAVIOUR_ERROR: &str = "enums require an \"enum_behaviour\" attribute, \
e.g., #[ssz(enum_behaviour = \"transparent\")]";
enum EnumBehaviour {
Transparent,
Union,
enum Procedure<'a> {
Struct {
data: &'a syn::DataStruct,
behaviour: StructBehaviour,
},
Enum {
data: &'a syn::DataEnum,
behaviour: EnumBehaviour,
},
}
impl EnumBehaviour {
pub fn new(s: Option<String>) -> Option<Self> {
s.map(|s| match s.as_ref() {
ENUM_TRANSPARENT => EnumBehaviour::Transparent,
ENUM_UNION => EnumBehaviour::Union,
other => panic!(
"{} is an invalid enum_behaviour, use either {:?}",
other, ENUM_VARIANTS
),
})
enum StructBehaviour {
Container,
Transparent,
}
enum EnumBehaviour {
Union,
Transparent,
}
impl<'a> Procedure<'a> {
fn read(item: &'a DeriveInput) -> Self {
let opts = StructOpts::from_derive_input(item).unwrap();
match &item.data {
syn::Data::Struct(data) => {
if opts.enum_behaviour.is_some() {
panic!("cannot use \"enum_behaviour\" for a struct");
}
match opts.struct_behaviour.as_deref() {
Some("container") | None => Procedure::Struct {
data,
behaviour: StructBehaviour::Container,
},
Some("transparent") => Procedure::Struct {
data,
behaviour: StructBehaviour::Transparent,
},
Some(other) => panic!(
"{} is not a valid struct behaviour, use \"container\" or \"transparent\"",
other
),
}
}
syn::Data::Enum(data) => {
if opts.struct_behaviour.is_some() {
panic!("cannot use \"struct_behaviour\" for an enum");
}
match opts.enum_behaviour.as_deref() {
Some("union") => Procedure::Enum {
data,
behaviour: EnumBehaviour::Union,
},
Some("transparent") => Procedure::Enum {
data,
behaviour: EnumBehaviour::Transparent,
},
Some(other) => panic!(
"{} is not a valid enum behaviour, use \"container\" or \"transparent\"",
other
),
None => panic!("{}", NO_ENUM_BEHAVIOUR_ERROR),
}
}
_ => panic!("ssz_derive only supports structs and enums"),
}
}
}
fn parse_ssz_fields(struct_data: &syn::DataStruct) -> Vec<(&syn::Type, &syn::Ident, FieldOpts)> {
fn parse_ssz_fields(
struct_data: &syn::DataStruct,
) -> Vec<(&syn::Type, Option<&syn::Ident>, FieldOpts)> {
struct_data
.fields
.iter()
.map(|field| {
let ty = &field.ty;
let ident = match &field.ident {
Some(ref ident) => ident,
_ => panic!("ssz_derive only supports named struct fields."),
};
let ident = field.ident.as_ref();
let field_opts_candidates = field
.attrs
@@ -93,21 +287,17 @@ fn parse_ssz_fields(struct_data: &syn::DataStruct) -> Vec<(&syn::Type, &syn::Ide
#[proc_macro_derive(Encode, attributes(ssz))]
pub fn ssz_encode_derive(input: TokenStream) -> TokenStream {
let item = parse_macro_input!(input as DeriveInput);
let opts = StructOpts::from_derive_input(&item).unwrap();
let enum_opt = EnumBehaviour::new(opts.enum_behaviour);
let procedure = Procedure::read(&item);
match &item.data {
syn::Data::Struct(s) => {
if enum_opt.is_some() {
panic!("enum_behaviour is invalid for structs");
}
ssz_encode_derive_struct(&item, s)
}
syn::Data::Enum(s) => match enum_opt.expect(NO_ENUM_BEHAVIOUR_ERROR) {
EnumBehaviour::Transparent => ssz_encode_derive_enum_transparent(&item, s),
EnumBehaviour::Union => ssz_encode_derive_enum_union(&item, s),
match procedure {
Procedure::Struct { data, behaviour } => match behaviour {
StructBehaviour::Transparent => ssz_encode_derive_struct_transparent(&item, data),
StructBehaviour::Container => ssz_encode_derive_struct(&item, data),
},
Procedure::Enum { data, behaviour } => match behaviour {
EnumBehaviour::Transparent => ssz_encode_derive_enum_transparent(&item, data),
EnumBehaviour::Union => ssz_encode_derive_enum_union(&item, data),
},
_ => panic!("ssz_derive only supports structs and enums"),
}
}
@@ -132,6 +322,13 @@ fn ssz_encode_derive_struct(derive_input: &DeriveInput, struct_data: &DataStruct
continue;
}
let ident = match ident {
Some(ref ident) => ident,
_ => panic!(
"#[ssz(struct_behaviour = \"container\")] only supports named struct fields."
),
};
if let Some(module) = field_opts.with {
let module = quote! { #module::encode };
field_is_ssz_fixed_len.push(quote! { #module::is_ssz_fixed_len() });
@@ -219,6 +416,82 @@ fn ssz_encode_derive_struct(derive_input: &DeriveInput, struct_data: &DataStruct
output.into()
}
/// Derive `ssz::Encode` "transparently" for a struct which has exactly one non-skipped field.
///
/// The single field is encoded directly, making the outermost `struct` transparent.
///
/// ## Field attributes
///
/// - `#[ssz(skip_serializing)]`: the field will not be serialized.
fn ssz_encode_derive_struct_transparent(
derive_input: &DeriveInput,
struct_data: &DataStruct,
) -> TokenStream {
let name = &derive_input.ident;
let (impl_generics, ty_generics, where_clause) = &derive_input.generics.split_for_impl();
let ssz_fields = parse_ssz_fields(struct_data);
let num_fields = ssz_fields
.iter()
.filter(|(_, _, field_opts)| !field_opts.skip_deserializing)
.count();
if num_fields != 1 {
panic!(
"A \"transparent\" struct must have exactly one non-skipped field ({} fields found)",
num_fields
);
}
let (ty, ident, _field_opts) = ssz_fields
.iter()
.find(|(_, _, field_opts)| !field_opts.skip_deserializing)
.expect("\"transparent\" struct must have at least one non-skipped field");
let output = if let Some(field_name) = ident {
quote! {
impl #impl_generics ssz::Encode for #name #ty_generics #where_clause {
fn is_ssz_fixed_len() -> bool {
<#ty as ssz::Encode>::is_ssz_fixed_len()
}
fn ssz_fixed_len() -> usize {
<#ty as ssz::Encode>::ssz_fixed_len()
}
fn ssz_bytes_len(&self) -> usize {
self.#field_name.ssz_bytes_len()
}
fn ssz_append(&self, buf: &mut Vec<u8>) {
self.#field_name.ssz_append(buf)
}
}
}
} else {
quote! {
impl #impl_generics ssz::Encode for #name #ty_generics #where_clause {
fn is_ssz_fixed_len() -> bool {
<#ty as ssz::Encode>::is_ssz_fixed_len()
}
fn ssz_fixed_len() -> usize {
<#ty as ssz::Encode>::ssz_fixed_len()
}
fn ssz_bytes_len(&self) -> usize {
self.0.ssz_bytes_len()
}
fn ssz_append(&self, buf: &mut Vec<u8>) {
self.0.ssz_append(buf)
}
}
}
};
output.into()
}
/// Derive `ssz::Encode` for an enum in the "transparent" method.
///
/// The "transparent" method is distinct from the "union" method specified in the SSZ specification.
@@ -367,24 +640,20 @@ fn ssz_encode_derive_enum_union(derive_input: &DeriveInput, enum_data: &DataEnum
#[proc_macro_derive(Decode, attributes(ssz))]
pub fn ssz_decode_derive(input: TokenStream) -> TokenStream {
let item = parse_macro_input!(input as DeriveInput);
let opts = StructOpts::from_derive_input(&item).unwrap();
let enum_opt = EnumBehaviour::new(opts.enum_behaviour);
let procedure = Procedure::read(&item);
match &item.data {
syn::Data::Struct(s) => {
if enum_opt.is_some() {
panic!("enum_behaviour is invalid for structs");
}
ssz_decode_derive_struct(&item, s)
}
syn::Data::Enum(s) => match enum_opt.expect(NO_ENUM_BEHAVIOUR_ERROR) {
match procedure {
Procedure::Struct { data, behaviour } => match behaviour {
StructBehaviour::Transparent => ssz_decode_derive_struct_transparent(&item, data),
StructBehaviour::Container => ssz_decode_derive_struct(&item, data),
},
Procedure::Enum { data, behaviour } => match behaviour {
EnumBehaviour::Union => ssz_decode_derive_enum_union(&item, data),
EnumBehaviour::Transparent => panic!(
"Decode cannot be derived for enum_behaviour \"{}\", only \"{}\" is valid.",
ENUM_TRANSPARENT, ENUM_UNION
),
EnumBehaviour::Union => ssz_decode_derive_enum_union(&item, s),
},
_ => panic!("ssz_derive only supports structs and enums"),
}
}
@@ -409,6 +678,13 @@ fn ssz_decode_derive_struct(item: &DeriveInput, struct_data: &DataStruct) -> Tok
let mut fixed_lens = vec![];
for (ty, ident, field_opts) in parse_ssz_fields(struct_data) {
let ident = match ident {
Some(ref ident) => ident,
_ => panic!(
"#[ssz(struct_behaviour = \"container\")] only supports named struct fields."
),
};
field_names.push(quote! {
#ident
});
@@ -545,6 +821,90 @@ fn ssz_decode_derive_struct(item: &DeriveInput, struct_data: &DataStruct) -> Tok
output.into()
}
/// Implements `ssz::Decode` "transparently" for a `struct` with exactly one non-skipped field.
///
/// The bytes will be decoded as if they are the inner field, without the outermost struct. The
/// outermost struct will then be applied artificially.
///
/// ## Field attributes
///
/// - `#[ssz(skip_deserializing)]`: during de-serialization the field will be instantiated from a
/// `Default` implementation. The decoder will assume that the field was not serialized at all
/// (e.g., if it has been serialized, an error will be raised instead of `Default` overriding it).
fn ssz_decode_derive_struct_transparent(
item: &DeriveInput,
struct_data: &DataStruct,
) -> TokenStream {
let name = &item.ident;
let (impl_generics, ty_generics, where_clause) = &item.generics.split_for_impl();
let ssz_fields = parse_ssz_fields(struct_data);
let num_fields = ssz_fields
.iter()
.filter(|(_, _, field_opts)| !field_opts.skip_deserializing)
.count();
if num_fields != 1 {
panic!(
"A \"transparent\" struct must have exactly one non-skipped field ({} fields found)",
num_fields
);
}
let mut fields = vec![];
let mut wrapped_type = None;
for (i, (ty, ident, field_opts)) in ssz_fields.into_iter().enumerate() {
if let Some(name) = ident {
if field_opts.skip_deserializing {
fields.push(quote! {
#name: <_>::default(),
});
} else {
fields.push(quote! {
#name: <_>::from_ssz_bytes(bytes)?,
});
wrapped_type = Some(ty);
}
} else {
let index = syn::Index::from(i);
if field_opts.skip_deserializing {
fields.push(quote! {
#index:<_>::default(),
});
} else {
fields.push(quote! {
#index:<_>::from_ssz_bytes(bytes)?,
});
wrapped_type = Some(ty);
}
}
}
let ty = wrapped_type.unwrap();
let output = quote! {
impl #impl_generics ssz::Decode for #name #ty_generics #where_clause {
fn is_ssz_fixed_len() -> bool {
<#ty as ssz::Decode>::is_ssz_fixed_len()
}
fn ssz_fixed_len() -> usize {
<#ty as ssz::Decode>::ssz_fixed_len()
}
fn from_ssz_bytes(bytes: &[u8]) -> std::result::Result<Self, ssz::DecodeError> {
Ok(Self {
#(
#fields
)*
})
}
}
};
output.into()
}
/// Derive `ssz::Decode` for an `enum` following the "union" SSZ spec.
fn ssz_decode_derive_enum_union(derive_input: &DeriveInput, enum_data: &DataEnum) -> TokenStream {
let name = &derive_input.ident;

215
consensus/ssz_derive/tests/tests.rs Normal file
View File

@@ -0,0 +1,215 @@
use ssz::{Decode, Encode};
use ssz_derive::{Decode, Encode};
use std::fmt::Debug;
use std::marker::PhantomData;
fn assert_encode<T: Encode>(item: &T, bytes: &[u8]) {
assert_eq!(item.as_ssz_bytes(), bytes);
}
fn assert_encode_decode<T: Encode + Decode + PartialEq + Debug>(item: &T, bytes: &[u8]) {
assert_encode(item, bytes);
assert_eq!(T::from_ssz_bytes(bytes).unwrap(), *item);
}
#[derive(PartialEq, Debug, Encode, Decode)]
#[ssz(enum_behaviour = "union")]
enum TwoFixedUnion {
U8(u8),
U16(u16),
}
#[derive(PartialEq, Debug, Encode, Decode)]
struct TwoFixedUnionStruct {
a: TwoFixedUnion,
}
#[test]
fn two_fixed_union() {
let eight = TwoFixedUnion::U8(1);
let sixteen = TwoFixedUnion::U16(1);
assert_encode_decode(&eight, &[0, 1]);
assert_encode_decode(&sixteen, &[1, 1, 0]);
assert_encode_decode(&TwoFixedUnionStruct { a: eight }, &[4, 0, 0, 0, 0, 1]);
assert_encode_decode(&TwoFixedUnionStruct { a: sixteen }, &[4, 0, 0, 0, 1, 1, 0]);
}
#[derive(PartialEq, Debug, Encode, Decode)]
struct VariableA {
a: u8,
b: Vec<u8>,
}
#[derive(PartialEq, Debug, Encode, Decode)]
struct VariableB {
a: Vec<u8>,
b: u8,
}
#[derive(PartialEq, Debug, Encode)]
#[ssz(enum_behaviour = "transparent")]
enum TwoVariableTrans {
A(VariableA),
B(VariableB),
}
#[derive(PartialEq, Debug, Encode)]
struct TwoVariableTransStruct {
a: TwoVariableTrans,
}
#[derive(PartialEq, Debug, Encode, Decode)]
#[ssz(enum_behaviour = "union")]
enum TwoVariableUnion {
A(VariableA),
B(VariableB),
}
#[derive(PartialEq, Debug, Encode, Decode)]
struct TwoVariableUnionStruct {
a: TwoVariableUnion,
}
#[test]
fn two_variable_trans() {
let trans_a = TwoVariableTrans::A(VariableA {
a: 1,
b: vec![2, 3],
});
let trans_b = TwoVariableTrans::B(VariableB {
a: vec![1, 2],
b: 3,
});
assert_encode(&trans_a, &[1, 5, 0, 0, 0, 2, 3]);
assert_encode(&trans_b, &[5, 0, 0, 0, 3, 1, 2]);
assert_encode(
&TwoVariableTransStruct { a: trans_a },
&[4, 0, 0, 0, 1, 5, 0, 0, 0, 2, 3],
);
assert_encode(
&TwoVariableTransStruct { a: trans_b },
&[4, 0, 0, 0, 5, 0, 0, 0, 3, 1, 2],
);
}
#[test]
fn two_variable_union() {
let union_a = TwoVariableUnion::A(VariableA {
a: 1,
b: vec![2, 3],
});
let union_b = TwoVariableUnion::B(VariableB {
a: vec![1, 2],
b: 3,
});
assert_encode_decode(&union_a, &[0, 1, 5, 0, 0, 0, 2, 3]);
assert_encode_decode(&union_b, &[1, 5, 0, 0, 0, 3, 1, 2]);
assert_encode_decode(
&TwoVariableUnionStruct { a: union_a },
&[4, 0, 0, 0, 0, 1, 5, 0, 0, 0, 2, 3],
);
assert_encode_decode(
&TwoVariableUnionStruct { a: union_b },
&[4, 0, 0, 0, 1, 5, 0, 0, 0, 3, 1, 2],
);
}
#[derive(PartialEq, Debug, Encode, Decode)]
#[ssz(enum_behaviour = "union")]
enum TwoVecUnion {
A(Vec<u8>),
B(Vec<u8>),
}
#[test]
fn two_vec_union() {
assert_encode_decode(&TwoVecUnion::A(vec![]), &[0]);
assert_encode_decode(&TwoVecUnion::B(vec![]), &[1]);
assert_encode_decode(&TwoVecUnion::A(vec![0]), &[0, 0]);
assert_encode_decode(&TwoVecUnion::B(vec![0]), &[1, 0]);
assert_encode_decode(&TwoVecUnion::A(vec![0, 1]), &[0, 0, 1]);
assert_encode_decode(&TwoVecUnion::B(vec![0, 1]), &[1, 0, 1]);
}
#[derive(PartialEq, Debug, Encode, Decode)]
#[ssz(struct_behaviour = "transparent")]
struct TransparentStruct {
inner: Vec<u8>,
}
impl TransparentStruct {
fn new(inner: u8) -> Self {
Self { inner: vec![inner] }
}
}
#[test]
fn transparent_struct() {
assert_encode_decode(&TransparentStruct::new(42), &vec![42_u8].as_ssz_bytes());
}
#[derive(PartialEq, Debug, Encode, Decode)]
#[ssz(struct_behaviour = "transparent")]
struct TransparentStructSkippedField {
inner: Vec<u8>,
#[ssz(skip_serializing, skip_deserializing)]
skipped: PhantomData<u64>,
}
impl TransparentStructSkippedField {
fn new(inner: u8) -> Self {
Self {
inner: vec![inner],
skipped: PhantomData,
}
}
}
#[test]
fn transparent_struct_skipped_field() {
assert_encode_decode(
&TransparentStructSkippedField::new(42),
&vec![42_u8].as_ssz_bytes(),
);
}
#[derive(PartialEq, Debug, Encode, Decode)]
#[ssz(struct_behaviour = "transparent")]
struct TransparentStructNewType(Vec<u8>);
#[test]
fn transparent_struct_newtype() {
assert_encode_decode(
&TransparentStructNewType(vec![42_u8]),
&vec![42_u8].as_ssz_bytes(),
);
}
#[derive(PartialEq, Debug, Encode, Decode)]
#[ssz(struct_behaviour = "transparent")]
struct TransparentStructNewTypeSkippedField(
Vec<u8>,
#[ssz(skip_serializing, skip_deserializing)] PhantomData<u64>,
);
impl TransparentStructNewTypeSkippedField {
fn new(inner: Vec<u8>) -> Self {
Self(inner, PhantomData)
}
}
#[test]
fn transparent_struct_newtype_skipped_field() {
assert_encode_decode(
&TransparentStructNewTypeSkippedField::new(vec![42_u8]),
&vec![42_u8].as_ssz_bytes(),
);
}