jiminy-core

Account layout, zero-copy IO, validation, PDA, sysvar access, lifecycle, math, time checks. Everything your pinocchio program needs before it touches a token.

#![no_std] / no_alloc / BPF-safe

[dependencies]

jiminy-core = "0.12"

What's in here


`account`	8-byte header, `AccountReader`, `AccountWriter`, `SliceCursor`, lifecycle (close/realloc), pod, `zero_copy_layout!`, `ZeroCopySlice`, list, bitflags
`check`	Owner / signer / key checks, PDA derivation and verification
`instruction`	Transaction introspection via the Instructions sysvar
`math`	Checked arithmetic, BPS helpers, scaling with u128 intermediates
`sysvar`	Clock and Rent readers (syscall-based + account-based)
`state`	State-machine transition validation
`time`	Deadline, cooldown, slot-staleness checks
`event`	Zero-alloc event emission via `sol_log_data`
`programs`	Well-known program IDs (feature-gated)

New in 0.12

zero_copy_layout! macro: declare #[repr(C)] structs that overlay directly onto account bytes. No proc macros.
ZeroCopySlice / ZeroCopySliceMut: length-prefixed arrays in account data. Zero-copy iteration, indexing, mutation.
pod_read<T>(): alignment-safe owned copy via read_unaligned. Works everywhere.
clock_timestamp(), clock_slot(), clock_epoch(): syscall-based sysvar access. No account slot needed.
rent_lamports_per_byte_year(): same, for Rent.

Usage

use jiminy_core::prelude::*;

let reader = AccountReader::new_checked(data, EXPECTED_DISC, EXPECTED_VER)?;
let owner = reader.pubkey_at(0)?;
let amount = reader.u64_at(32)?;

programs feature is on by default. log feature adds sol_log wrappers.

About

Built by MoonManQuark / Bluefoot Labs.

Donations: solanadevdao.sol (F42ZovBoRJZU4av5MiESVwJWnEx8ZQVFkc1RM29zMxNT)

License