46 lines
1.5 KiB
Rust
46 lines
1.5 KiB
Rust
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//! @brief Example Rust-based BPF program that exercises instruction introspection
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extern crate solana_sdk;
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use solana_sdk::{
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account_info::next_account_info, account_info::AccountInfo, entrypoint,
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entrypoint::ProgramResult, info, program_error::ProgramError, pubkey::Pubkey,
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sysvar::instructions,
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};
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entrypoint!(process_instruction);
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fn process_instruction(
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_program_id: &Pubkey,
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accounts: &[AccountInfo],
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instruction_data: &[u8],
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) -> ProgramResult {
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if instruction_data.is_empty() {
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return Err(ProgramError::InvalidAccountData);
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}
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let secp_instruction_index = instruction_data[0];
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let account_info_iter = &mut accounts.iter();
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let instruction_accounts = next_account_info(account_info_iter)?;
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assert_eq!(*instruction_accounts.key, instructions::id());
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let data_len = instruction_accounts.try_borrow_data()?.len();
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if data_len < 2 {
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return Err(ProgramError::InvalidAccountData);
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}
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let instruction = instructions::get_instruction(
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secp_instruction_index as usize,
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&instruction_accounts.try_borrow_data()?,
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)
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.map_err(|_| ProgramError::InvalidAccountData)?;
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let current_instruction =
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instructions::get_current_instruction(&instruction_accounts.try_borrow_data()?);
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let my_index = instruction_data[1] as u16;
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assert_eq!(current_instruction, my_index);
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info!(&format!("id: {}", instruction.program_id));
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info!(&format!("data[0]: {}", instruction.data[0]));
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info!(&format!("index: {}", current_instruction));
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Ok(())
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}
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