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use move_binary_format::{
errors::{PartialVMError, PartialVMResult},
file_format::AbilitySet,
};
use move_core_types::{
account_address::AccountAddress,
identifier::Identifier,
language_storage::{StructTag, TypeTag},
value::{MoveStructLayout, MoveTypeLayout},
vm_status::StatusCode,
};
use serde::{Deserialize, Deserializer, Serialize, Serializer};
use std::convert::TryInto;
#[derive(Debug, Clone, Copy)]
pub(crate) struct WrappedAbilitySet(pub AbilitySet);
impl Serialize for WrappedAbilitySet {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: Serializer,
{
self.0.into_u8().serialize(serializer)
}
}
impl<'de> Deserialize<'de> for WrappedAbilitySet {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: Deserializer<'de>,
{
let byte = u8::deserialize(deserializer)?;
Ok(WrappedAbilitySet(AbilitySet::from_u8(byte).ok_or_else(
|| serde::de::Error::custom(format!("Invalid ability set: {:X}", byte)),
)?))
}
}
#[derive(Debug, Clone, Serialize, Deserialize)]
pub(crate) struct FatStructType {
pub address: AccountAddress,
pub module: Identifier,
pub name: Identifier,
pub abilities: WrappedAbilitySet,
pub ty_args: Vec<FatType>,
pub layout: Vec<FatType>,
}
#[derive(Debug, Clone, Serialize, Deserialize)]
pub(crate) enum FatType {
Bool,
U8,
U64,
U128,
Address,
Signer,
Vector(Box<FatType>),
Struct(Box<FatStructType>),
Reference(Box<FatType>),
MutableReference(Box<FatType>),
TyParam(usize),
}
impl FatStructType {
pub fn subst(&self, ty_args: &[FatType]) -> PartialVMResult<FatStructType> {
Ok(Self {
address: self.address,
module: self.module.clone(),
name: self.name.clone(),
abilities: self.abilities,
ty_args: self
.ty_args
.iter()
.map(|ty| ty.subst(ty_args))
.collect::<PartialVMResult<_>>()?,
layout: self
.layout
.iter()
.map(|ty| ty.subst(ty_args))
.collect::<PartialVMResult<_>>()?,
})
}
pub fn struct_tag(&self) -> PartialVMResult<StructTag> {
let ty_args = self
.ty_args
.iter()
.map(|ty| ty.type_tag())
.collect::<PartialVMResult<Vec<_>>>()?;
Ok(StructTag {
address: self.address,
module: self.module.clone(),
name: self.name.clone(),
type_params: ty_args,
})
}
}
impl FatType {
pub fn subst(&self, ty_args: &[FatType]) -> PartialVMResult<FatType> {
use FatType::*;
let res = match self {
TyParam(idx) => match ty_args.get(*idx) {
Some(ty) => ty.clone(),
None => {
return Err(
PartialVMError::new(StatusCode::UNKNOWN_INVARIANT_VIOLATION_ERROR)
.with_message(format!(
"fat type substitution failed: index out of bounds -- len {} got {}",
ty_args.len(),
idx
)),
);
}
},
Bool => Bool,
U8 => U8,
U64 => U64,
U128 => U128,
Address => Address,
Signer => Signer,
Vector(ty) => Vector(Box::new(ty.subst(ty_args)?)),
Reference(ty) => Reference(Box::new(ty.subst(ty_args)?)),
MutableReference(ty) => MutableReference(Box::new(ty.subst(ty_args)?)),
Struct(struct_ty) => Struct(Box::new(struct_ty.subst(ty_args)?)),
};
Ok(res)
}
pub fn type_tag(&self) -> PartialVMResult<TypeTag> {
use FatType::*;
let res = match self {
Bool => TypeTag::Bool,
U8 => TypeTag::U8,
U64 => TypeTag::U64,
U128 => TypeTag::U128,
Address => TypeTag::Address,
Signer => TypeTag::Signer,
Vector(ty) => TypeTag::Vector(Box::new(ty.type_tag()?)),
Struct(struct_ty) => TypeTag::Struct(struct_ty.struct_tag()?),
Reference(_) | MutableReference(_) | TyParam(_) => {
return Err(
PartialVMError::new(StatusCode::UNKNOWN_INVARIANT_VIOLATION_ERROR)
.with_message(format!("cannot derive type tag for {:?}", self)),
)
}
};
Ok(res)
}
}
impl TryInto<MoveStructLayout> for &FatStructType {
type Error = PartialVMError;
fn try_into(self) -> Result<MoveStructLayout, Self::Error> {
Ok(MoveStructLayout::new(
self.layout
.iter()
.map(|ty| ty.try_into())
.collect::<PartialVMResult<Vec<_>>>()?,
))
}
}
impl TryInto<MoveTypeLayout> for &FatType {
type Error = PartialVMError;
fn try_into(self) -> Result<MoveTypeLayout, Self::Error> {
Ok(match self {
FatType::Address => MoveTypeLayout::Address,
FatType::U8 => MoveTypeLayout::U8,
FatType::U64 => MoveTypeLayout::U64,
FatType::U128 => MoveTypeLayout::U128,
FatType::Bool => MoveTypeLayout::Bool,
FatType::Vector(v) => MoveTypeLayout::Vector(Box::new(v.as_ref().try_into()?)),
FatType::Struct(s) => MoveTypeLayout::Struct(MoveStructLayout::new(
s.layout
.iter()
.map(|ty| ty.try_into())
.collect::<PartialVMResult<Vec<_>>>()?,
)),
FatType::Signer => MoveTypeLayout::Signer,
_ => return Err(PartialVMError::new(StatusCode::ABORT_TYPE_MISMATCH_ERROR)),
})
}
}