1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
use {
crate::{AccountField, AccountsStruct, Ty},
heck::SnakeCase,
quote::quote,
std::str::FromStr,
};
// Generates the private `__client_accounts` mod implementation, containing
// a generated struct mapping 1-1 to the `Accounts` struct, except with
// `Pubkey`s as the types. This is generated for Rust *clients*.
pub fn generate(
accs: &AccountsStruct,
program_id: proc_macro2::TokenStream,
) -> proc_macro2::TokenStream {
let name = &accs.ident;
let account_mod_name: proc_macro2::TokenStream = format!(
"__client_accounts_{}",
accs.ident.to_string().to_snake_case()
)
.parse()
.unwrap();
let account_struct_fields: Vec<proc_macro2::TokenStream> = accs
.fields
.iter()
.map(|f: &AccountField| match f {
AccountField::CompositeField(s) => {
let name = &s.ident;
let docs = if let Some(ref docs) = s.docs {
docs.iter()
.map(|docs_line| {
proc_macro2::TokenStream::from_str(&format!(
"#[doc = r#\"{docs_line}\"#]"
))
.unwrap()
})
.collect()
} else {
quote!()
};
let symbol: proc_macro2::TokenStream = format!(
"__client_accounts_{0}::{1}",
s.symbol.to_snake_case(),
s.symbol,
)
.parse()
.unwrap();
quote! {
#docs
pub #name: #symbol
}
}
AccountField::Field(f) => {
let name = &f.ident;
let docs = if let Some(ref docs) = f.docs {
docs.iter()
.map(|docs_line| {
proc_macro2::TokenStream::from_str(&format!(
"#[doc = r#\"{docs_line}\"#]"
))
.unwrap()
})
.collect()
} else {
quote!()
};
if f.is_optional {
quote! {
#docs
pub #name: Option<Pubkey>
}
} else {
quote! {
#docs
pub #name: Pubkey
}
}
}
})
.collect();
let account_struct_metas: Vec<proc_macro2::TokenStream> = accs
.fields
.iter()
.map(|f: &AccountField| match f {
AccountField::CompositeField(s) => {
let name = &s.ident;
quote! {
account_metas.extend(self.#name.to_account_metas(None));
}
}
AccountField::Field(f) => {
let is_signer = match f.ty {
Ty::Signer => true,
_ => f.constraints.is_signer(),
};
let is_signer = match is_signer {
false => quote! {false},
true => quote! {true},
};
let meta = match f.constraints.is_mutable() {
false => quote! { anchor_lang::solana_program::instruction::AccountMeta::new_readonly },
true => quote! { anchor_lang::solana_program::instruction::AccountMeta::new },
};
let name = &f.ident;
if f.is_optional {
quote! {
if let Some(#name) = &self.#name {
account_metas.push(#meta(*#name, #is_signer));
} else {
account_metas.push(anchor_lang::solana_program::instruction::AccountMeta::new_readonly(#program_id, false));
}
}
} else {
quote! {
account_metas.push(#meta(self.#name, #is_signer));
}
}
}
})
.collect();
// Re-export all composite account structs (i.e. other structs deriving
// accounts embedded into this struct. Required because, these embedded
// structs are *not* visible from the #[program] macro, which is responsible
// for generating the `accounts` mod, which aggregates all the generated
// accounts used for structs.
let re_exports: Vec<proc_macro2::TokenStream> = {
// First, dedup the exports.
let mut re_exports = std::collections::HashSet::new();
for f in accs.fields.iter().filter_map(|f: &AccountField| match f {
AccountField::CompositeField(s) => Some(s),
AccountField::Field(_) => None,
}) {
re_exports.insert(format!(
"__client_accounts_{0}::{1}",
f.symbol.to_snake_case(),
f.symbol,
));
}
re_exports
.iter()
.map(|symbol: &String| {
let symbol: proc_macro2::TokenStream = symbol.parse().unwrap();
quote! {
pub use #symbol;
}
})
.collect()
};
let struct_doc = proc_macro2::TokenStream::from_str(&format!(
"#[doc = \" Generated client accounts for [`{name}`].\"]"
))
.unwrap();
quote! {
/// An internal, Anchor generated module. This is used (as an
/// implementation detail), to generate a struct for a given
/// `#[derive(Accounts)]` implementation, where each field is a Pubkey,
/// instead of an `AccountInfo`. This is useful for clients that want
/// to generate a list of accounts, without explicitly knowing the
/// order all the fields should be in.
///
/// To access the struct in this module, one should use the sibling
/// `accounts` module (also generated), which re-exports this.
pub(crate) mod #account_mod_name {
use super::*;
use anchor_lang::prelude::borsh;
#(#re_exports)*
#struct_doc
#[derive(anchor_lang::AnchorSerialize)]
pub struct #name {
#(#account_struct_fields),*
}
#[automatically_derived]
impl anchor_lang::ToAccountMetas for #name {
fn to_account_metas(&self, is_signer: Option<bool>) -> Vec<anchor_lang::solana_program::instruction::AccountMeta> {
let mut account_metas = vec![];
#(#account_struct_metas)*
account_metas
}
}
}
}
}