jiminy-anchor 0.16.0

Adapter for reading Anchor-framework accounts from Jiminy programs. Provides Anchor discriminator utilities and account header translation.
Documentation

jiminy-anchor

Adapter for reading Anchor-framework accounts from Jiminy programs (and vice versa). No dependency on anchor-lang. Operates purely on raw byte layouts.

#![no_std] / no_alloc / BPF-safe

[dependencies]

jiminy-anchor = "0.16"

What's in here
anchor_disc Compute the 8-byte Anchor discriminator at compile time
check_anchor_disc Validate an Anchor discriminator on raw account data
AnchorHeader Zero-copy overlay for the 8-byte Anchor discriminator
anchor_body / anchor_body_mut Get the body slice ([8..]) from Anchor account data
check_and_body Discriminator check + body slice in one call
check_and_overlay / check_and_overlay_mut Disc check + Pod overlay on the body
check_anchor_with_layout_id Verify both Anchor disc and Jiminy layout_id

Example

use jiminy_anchor::{anchor_disc, check_anchor_disc, anchor_body};
use jiminy_core::account::{pod_from_bytes, Pod, FixedLayout};

const VAULT_DISC: [u8; 8] = anchor_disc("Vault");

#[repr(C)]
#[derive(Clone, Copy)]
struct AnchorVaultBody {
    balance: [u8; 8],
    authority: [u8; 32],
}
unsafe impl Pod for AnchorVaultBody {}
impl FixedLayout for AnchorVaultBody { const SIZE: usize = 40; }

fn read_anchor_vault(data: &[u8]) -> Result<&AnchorVaultBody, jiminy_core::ProgramError> {
    check_anchor_disc(data, &VAULT_DISC)?;
    pod_from_bytes::<AnchorVaultBody>(&data[8..])
}

About

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License

Apache-2.0