#heap #invoke #solana #compute #replace #better #instructions

solana-invoke

A drop-in replacement for solana_program::program::invoke* with better compute and heap efficiency

2 unstable releases

0.2.0 Oct 7, 2024
0.1.0 May 9, 2024

#19 in #invoke

Download history 9/week @ 2024-09-22 16/week @ 2024-09-29 235/week @ 2024-10-06 38/week @ 2024-10-13 10/week @ 2024-10-20

299 downloads per month

MIT/Apache

11KB
142 lines

solana-invoke

A drop-in replacement for solana_program::program::invoke* with better compute and heap efficiency

Summary

The current CPI functions solana_program::program::invoke* perform unnecessary copies and allocations. This crate removes these inefficiencies in a manner that is 100% backwards compatible.

The compute and heap savings scale with the amount of accounts and data passed in on CPI. Even in the test program featured in test-program/, which passes in only two accounts and O(16 bytes) of data, a significant saving is observed (overhead reduced from 536 cus -> 197 cus).

// test-program schematic. logs and asserts are redacted.

// A simple solana program that transfers 1 lamport twice
fn process_instruction(
    _program_id: &Pubkey,
    accounts: &[AccountInfo],
    _data: &[u8],
) -> ProgramResult {
    // Send from account zero to account one, thrice.
    // 1) First with standard invoke.
    // 2) Then with our invoke
    // 3) Then with our invoke_signed_unchecked
    let transfer =
        solana_program::system_instruction::transfer(accounts[0].key, accounts[1].key, 1);

    // 1) First with standard invoke_signed.
    solana_program::program::invoke(&transfer, &accounts[..2])?;

    // 2) Then with our invoke_signed
    solana_invoke::invoke(&transfer, &accounts[..2])?;

    // 3) Then with our invoke_signed
    solana_invoke::invoke_unchecked(&transfer, &accounts[..2])?;

    Ok(())
}

Output:

Program 1111111QLbz7JHiBTspS962RLKV8GndWFwiEaqKM invoke [1]
Program log: invoking system program via solana_program::program::invoke
Program 11111111111111111111111111111111 invoke [2]
Program 11111111111111111111111111111111 success
Program log: invoked system program via solana_program::program::invoke successfully: 536 cus
Program log: invoking system program via our invoke
Program 11111111111111111111111111111111 invoke [2]
Program 11111111111111111111111111111111 success
Program log: invoked system program via our invoke successfully: 392 cus
Program log: invoking system program via our invoke
Program 11111111111111111111111111111111 invoke [2]
Program 11111111111111111111111111111111 success
Program log: invoked system program via our invoke successfully: 197 cus
Program 1111111QLbz7JHiBTspS962RLKV8GndWFwiEaqKM consumed 7864 of 200000 compute units
Program 1111111QLbz7JHiBTspS962RLKV8GndWFwiEaqKM success

Dependencies

~11–19MB
~267K SLoC