39 lines
1.1 KiB
Rust
39 lines
1.1 KiB
Rust
//! This account contains the serialized transaction instructions
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use crate::{instruction::Instruction, sanitize::SanitizeError, sysvar::Sysvar};
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pub type Instructions = Vec<Instruction>;
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crate::declare_sysvar_id!("Sysvar1nstructions1111111111111111111111111", Instructions);
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impl Sysvar for Instructions {}
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pub fn load_current_index(data: &[u8]) -> u16 {
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let mut instr_fixed_data = [0u8; 2];
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let len = data.len();
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instr_fixed_data.copy_from_slice(&data[len - 2..len]);
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u16::from_le_bytes(instr_fixed_data)
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}
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pub fn store_current_index(data: &mut [u8], instruction_index: u16) {
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let last_index = data.len() - 2;
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data[last_index..last_index + 2].copy_from_slice(&instruction_index.to_le_bytes());
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}
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pub fn load_instruction_at(index: usize, data: &[u8]) -> Result<Instruction, SanitizeError> {
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crate::message::Message::deserialize_instruction(index, data)
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn test_load_store_instruction() {
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let mut data = [4u8; 10];
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store_current_index(&mut data, 3);
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assert_eq!(load_current_index(&data), 3);
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assert_eq!([4u8; 8], data[0..8]);
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}
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}
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