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// Copyright (c) Subzero Labs, Inc.
// SPDX-License-Identifier: Apache-2.0
use quote::quote;
use syn::FnArg;
use crate::{
codegen::accounts::{bumps, constraints, generics, ParsedGenerics},
AccountField, AccountsStruct,
};
// Generates the `Accounts` trait implementation.
pub fn generate(accs: &AccountsStruct) -> proc_macro2::TokenStream {
let name = &accs.ident;
let ParsedGenerics {
combined_generics,
trait_generics,
struct_generics,
where_clause,
} = generics(accs);
// Deserialization for each field
let deser_fields: Vec<proc_macro2::TokenStream> = accs
.fields
.iter()
.map(|af: &AccountField| {
match af {
AccountField::CompositeField(s) => {
let name = &s.ident;
let ty = &s.raw_field.ty;
quote! {
#[cfg(feature = "sol-debug")]
::rialo_s_program::log::rlo_log(stringify!(#name));
let #name: #ty = rialo_sol_lang::Accounts::try_accounts(__program_id, __accounts, __ix_data, &mut __bumps.#name, __reallocs)?;
}
}
AccountField::Field(f) => {
// `init` and `zero` accounts are special cased as they are
// deserialized by constraints. Here, we just take out the
// AccountInfo for later use at constraint validation time.
if is_init(af) || f.constraints.zeroed.is_some() {
let name = &f.ident;
// Optional accounts have slightly different behavior here and
// we can't leverage the try_accounts implementation for zero and init.
if f.is_optional {
// Thus, this block essentially reimplements the try_accounts
// behavior with optional accounts minus the deserialization.
let empty_behavior = if cfg!(feature = "allow-missing-optionals") {
quote!{ None }
} else {
quote!{ return Err(rialo_sol_lang::error::ErrorCode::AccountNotEnoughKeys.into()); }
};
quote! {
let #name = if __accounts.is_empty() {
#empty_behavior
} else if __accounts[0].key == __program_id {
*__accounts = &__accounts[1..];
None
} else {
let account = &__accounts[0];
*__accounts = &__accounts[1..];
Some(account)
};
}
} else {
quote!{
if __accounts.is_empty() {
return Err(rialo_sol_lang::error::ErrorCode::AccountNotEnoughKeys.into());
}
let #name = &__accounts[0];
*__accounts = &__accounts[1..];
}
}
} else {
let name = f.ident.to_string();
let typed_name = f.typed_ident();
quote! {
#[cfg(feature = "sol-debug")]
::rialo_s_program::log::rlo_log(stringify!(#typed_name));
let #typed_name = rialo_sol_lang::Accounts::try_accounts(__program_id, __accounts, __ix_data, __bumps, __reallocs)
.map_err(|e| e.with_account_name(#name))?;
}
}
}
}
})
.collect();
let constraints = generate_constraints(accs);
let accounts_instance = generate_accounts_instance(accs);
let bumps_struct_name = bumps::generate_bumps_name(&accs.ident);
let ix_de = match &accs.instruction_api {
None => quote! {},
Some(ix_api) => {
let strct_inner = &ix_api;
let field_names: Vec<proc_macro2::TokenStream> = ix_api
.iter()
.map(|arg: &FnArg| match arg {
FnArg::Typed(pat_type) => {
let field = &pat_type.pat;
quote! {
#field
}
}
_ => panic!("Invalid instruction declaration"),
})
.collect();
quote! {
let mut __ix_data = __ix_data;
#[derive(rialo_sol_lang::SolSerialize, rialo_sol_lang::SolDeserialize)]
struct __Args {
#strct_inner
}
let __Args {
#(#field_names),*
} = __Args::deserialize(&mut __ix_data)
.map_err(|_| rialo_sol_lang::error::ErrorCode::InstructionDidNotDeserialize)?;
}
}
};
quote! {
#[automatically_derived]
impl<#combined_generics> rialo_sol_lang::Accounts<#trait_generics, #bumps_struct_name> for #name<#struct_generics> #where_clause {
#[inline(never)]
fn try_accounts(
__program_id: &rialo_sol_lang::rialo_s_program::pubkey::Pubkey,
__accounts: &mut &#trait_generics [rialo_sol_lang::rialo_s_program::account_info::AccountInfo<#trait_generics>],
__ix_data: &[u8],
__bumps: &mut #bumps_struct_name,
__reallocs: &mut std::collections::BTreeSet<rialo_sol_lang::rialo_s_program::pubkey::Pubkey>,
) -> rialo_sol_lang::Result<Self> {
// Deserialize instruction, if declared.
#ix_de
// Deserialize each account.
#(#deser_fields)*
// Execute accounts constraints.
#constraints
// Success. Return the validated accounts.
Ok(#accounts_instance)
}
}
}
}
pub fn generate_constraints(accs: &AccountsStruct) -> proc_macro2::TokenStream {
let non_init_fields: Vec<&AccountField> =
accs.fields.iter().filter(|af| !is_init(af)).collect();
// Deserialization for each pda init field. This must be after
// the initial extraction from the accounts slice and before access_checks.
let init_fields: Vec<proc_macro2::TokenStream> = accs
.fields
.iter()
.filter_map(|af| match af {
AccountField::CompositeField(_s) => None,
AccountField::Field(f) => match is_init(af) {
false => None,
true => Some(f),
},
})
.map(|f| constraints::generate(f, accs))
.collect();
// Constraint checks for each account fields.
let access_checks: Vec<proc_macro2::TokenStream> = non_init_fields
.iter()
.map(|af: &&AccountField| match af {
AccountField::Field(f) => constraints::generate(f, accs),
AccountField::CompositeField(s) => constraints::generate_composite(s),
})
.collect();
quote! {
#(#init_fields)*
#(#access_checks)*
}
}
pub fn generate_accounts_instance(accs: &AccountsStruct) -> proc_macro2::TokenStream {
let name = &accs.ident;
// Each field in the final deserialized accounts struct.
let return_tys: Vec<proc_macro2::TokenStream> = accs
.fields
.iter()
.map(|f: &AccountField| {
let name = match f {
AccountField::CompositeField(s) => &s.ident,
AccountField::Field(f) => &f.ident,
};
quote! {
#name
}
})
.collect();
quote! {
#name {
#(#return_tys),*
}
}
}
fn is_init(af: &AccountField) -> bool {
match af {
AccountField::CompositeField(_s) => false,
AccountField::Field(f) => f.constraints.init.is_some(),
}
}