2021-01-14 15:16:27 -08:00
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use crate::{Program, Rpc};
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2020-12-31 15:48:06 -08:00
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use heck::CamelCase;
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use quote::quote;
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pub fn generate(program: Program) -> proc_macro2::TokenStream {
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let mod_name = &program.name;
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let instruction_name = instruction_enum_name(&program);
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let dispatch = generate_dispatch(&program);
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2021-01-20 17:13:02 -08:00
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let handlers_non_inlined = generate_non_inlined_handlers(&program);
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2020-12-31 15:48:06 -08:00
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let methods = generate_methods(&program);
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let instruction = generate_instruction(&program);
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2021-01-14 15:16:27 -08:00
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let cpi = generate_cpi(&program);
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2020-12-31 15:48:06 -08:00
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quote! {
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2021-01-09 22:03:14 -08:00
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// Import everything in the mod, in case the user wants to put types
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2020-12-31 15:48:06 -08:00
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// in there.
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use #mod_name::*;
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2021-01-14 15:16:27 -08:00
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#[cfg(not(feature = "no-entrypoint"))]
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2021-01-15 20:10:24 -08:00
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anchor_lang::solana_program::entrypoint!(entry);
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2021-01-14 15:16:27 -08:00
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#[cfg(not(feature = "no-entrypoint"))]
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2020-12-31 15:48:06 -08:00
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fn entry(program_id: &Pubkey, accounts: &[AccountInfo], instruction_data: &[u8]) -> ProgramResult {
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let mut data: &[u8] = instruction_data;
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2021-01-20 17:13:02 -08:00
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let ix = __private::instruction::#instruction_name::deserialize(&mut data)
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2020-12-31 15:48:06 -08:00
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.map_err(|_| ProgramError::Custom(1))?; // todo: error code
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#dispatch
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}
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2021-01-20 17:13:02 -08:00
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// Create a private module to not clutter the program's namespace.
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mod __private {
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use super::*;
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#handlers_non_inlined
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#instruction
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}
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2020-12-31 15:48:06 -08:00
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2021-01-20 17:13:02 -08:00
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#methods
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2021-01-14 15:16:27 -08:00
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#cpi
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2020-12-31 15:48:06 -08:00
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}
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}
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pub fn generate_dispatch(program: &Program) -> proc_macro2::TokenStream {
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let dispatch_arms: Vec<proc_macro2::TokenStream> = program
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.rpcs
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.iter()
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.map(|rpc| {
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let rpc_arg_names: Vec<&syn::Ident> = rpc.args.iter().map(|arg| &arg.name).collect();
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2021-01-14 15:16:27 -08:00
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let variant_arm = generate_ix_variant(program, rpc);
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2020-12-31 15:48:06 -08:00
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let rpc_name = &rpc.raw_method.sig.ident;
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2021-01-20 17:13:02 -08:00
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quote! {
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__private::instruction::#variant_arm => {
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__private::#rpc_name(program_id, accounts, #(#rpc_arg_names),*)
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}
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}
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})
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.collect();
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quote! {
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match ix {
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#(#dispatch_arms),*
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}
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}
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}
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// Generate non-inlined wrappers for each instruction handler, since Solana's
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// BPF max stack size can't handle reasonable sized dispatch trees without doing
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// so.
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pub fn generate_non_inlined_handlers(program: &Program) -> proc_macro2::TokenStream {
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let program_name = &program.name;
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let non_inlined_handlers: Vec<proc_macro2::TokenStream> = program
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.rpcs
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.iter()
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.map(|rpc| {
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let rpc_params: Vec<_> = rpc.args.iter().map(|arg| &arg.raw_arg).collect();
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let rpc_arg_names: Vec<&syn::Ident> = rpc.args.iter().map(|arg| &arg.name).collect();
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let rpc_name = &rpc.raw_method.sig.ident;
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2020-12-31 15:48:06 -08:00
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let anchor = &rpc.anchor_ident;
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quote! {
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2021-01-20 17:13:02 -08:00
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#[inline(never)]
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pub fn #rpc_name(
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program_id: &Pubkey,
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accounts: &[AccountInfo],
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#(#rpc_params),*
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) -> ProgramResult {
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2021-01-14 15:16:27 -08:00
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let mut remaining_accounts: &[AccountInfo] = accounts;
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let mut accounts = #anchor::try_accounts(program_id, &mut remaining_accounts)?;
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2020-12-31 15:48:06 -08:00
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#program_name::#rpc_name(
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2021-01-14 22:35:50 -08:00
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Context::new(program_id, &mut accounts, remaining_accounts),
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2020-12-31 15:48:06 -08:00
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#(#rpc_arg_names),*
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)?;
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2021-01-14 15:16:27 -08:00
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accounts.exit(program_id)
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2020-12-31 15:48:06 -08:00
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}
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}
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})
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.collect();
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quote! {
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2021-01-20 17:13:02 -08:00
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#(#non_inlined_handlers)*
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2020-12-31 15:48:06 -08:00
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}
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}
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2021-01-14 15:16:27 -08:00
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pub fn generate_ix_variant(program: &Program, rpc: &Rpc) -> proc_macro2::TokenStream {
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let enum_name = instruction_enum_name(program);
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let rpc_arg_names: Vec<&syn::Ident> = rpc.args.iter().map(|arg| &arg.name).collect();
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let rpc_name_camel = proc_macro2::Ident::new(
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&rpc.raw_method.sig.ident.to_string().to_camel_case(),
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rpc.raw_method.sig.ident.span(),
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);
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if rpc.args.len() == 0 {
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quote! {
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#enum_name::#rpc_name_camel
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}
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} else {
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quote! {
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#enum_name::#rpc_name_camel {
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#(#rpc_arg_names),*
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}
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}
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}
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}
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2020-12-31 15:48:06 -08:00
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pub fn generate_methods(program: &Program) -> proc_macro2::TokenStream {
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let program_mod = &program.program_mod;
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quote! {
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#program_mod
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}
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}
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pub fn generate_instruction(program: &Program) -> proc_macro2::TokenStream {
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let enum_name = instruction_enum_name(program);
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let variants: Vec<proc_macro2::TokenStream> = program
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.rpcs
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.iter()
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.map(|rpc| {
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let rpc_name_camel = proc_macro2::Ident::new(
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&rpc.raw_method.sig.ident.to_string().to_camel_case(),
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rpc.raw_method.sig.ident.span(),
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);
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let raw_args: Vec<&syn::PatType> = rpc.args.iter().map(|arg| &arg.raw_arg).collect();
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// If no args, output a "unit" variant instead of a struct variant.
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if rpc.args.len() == 0 {
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quote! {
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#rpc_name_camel
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}
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} else {
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quote! {
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#rpc_name_camel {
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#(#raw_args),*
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}
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}
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}
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})
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.collect();
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quote! {
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pub mod instruction {
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use super::*;
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#[derive(AnchorSerialize, AnchorDeserialize)]
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pub enum #enum_name {
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#(#variants),*
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}
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}
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}
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}
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fn instruction_enum_name(program: &Program) -> proc_macro2::Ident {
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proc_macro2::Ident::new(
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2021-01-20 17:13:02 -08:00
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&format!("{}Instruction", program.name.to_string().to_camel_case()),
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2020-12-31 15:48:06 -08:00
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program.name.span(),
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)
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}
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2021-01-14 15:16:27 -08:00
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fn generate_cpi(program: &Program) -> proc_macro2::TokenStream {
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let cpi_methods: Vec<proc_macro2::TokenStream> = program
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.rpcs
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.iter()
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.map(|rpc| {
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let accounts_ident = &rpc.anchor_ident;
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let cpi_method = {
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let ix_variant = generate_ix_variant(program, rpc);
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let method_name = &rpc.ident;
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let args: Vec<&syn::PatType> = rpc.args.iter().map(|arg| &arg.raw_arg).collect();
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quote! {
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pub fn #method_name<'a, 'b, 'c, 'info>(
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ctx: CpiContext<'a, 'b, 'c, 'info, #accounts_ident<'info>>,
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#(#args),*
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) -> ProgramResult {
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let ix = {
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2021-01-20 17:13:02 -08:00
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let ix = __private::instruction::#ix_variant;
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2021-01-14 15:16:27 -08:00
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let data = AnchorSerialize::try_to_vec(&ix)
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.map_err(|_| ProgramError::InvalidInstructionData)?;
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2021-01-20 17:13:02 -08:00
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let accounts = ctx.accounts.to_account_metas(None);
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2021-01-15 20:10:24 -08:00
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anchor_lang::solana_program::instruction::Instruction {
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2021-01-14 15:16:27 -08:00
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program_id: *ctx.program.key,
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accounts,
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data,
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}
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};
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let mut acc_infos = ctx.accounts.to_account_infos();
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acc_infos.push(ctx.program.clone());
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2021-01-15 20:10:24 -08:00
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anchor_lang::solana_program::program::invoke_signed(
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2021-01-14 15:16:27 -08:00
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&ix,
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&acc_infos,
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ctx.signer_seeds,
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)
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}
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}
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};
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cpi_method
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})
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.collect();
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quote! {
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2021-01-14 17:09:15 -08:00
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#[cfg(feature = "cpi")]
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2021-01-14 15:16:27 -08:00
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pub mod cpi {
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use super::*;
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#(#cpi_methods)*
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}
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}
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}
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