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use super::*;
pub const MAX_EDITION_MARKER_SIZE: usize = 32;
pub const EDITION_MARKER_BIT_SIZE: u64 = 248;
#[repr(C)]
#[cfg_attr(feature = "serde-feature", derive(Serialize, Deserialize))]
#[derive(BorshSerialize, BorshDeserialize, PartialEq, Eq, Debug, Clone, ShankAccount)]
pub struct EditionMarker {
pub key: Key,
pub ledger: [u8; 31],
}
impl Default for EditionMarker {
fn default() -> Self {
Self {
key: Key::EditionMarker,
ledger: [0; 31],
}
}
}
impl TokenMetadataAccount for EditionMarker {
fn key() -> Key {
Key::EditionMarker
}
fn size() -> usize {
MAX_EDITION_MARKER_SIZE
}
}
impl EditionMarker {
fn get_edition_offset_from_starting_index(edition: u64) -> Result<usize, ProgramError> {
Ok(edition
.checked_rem(EDITION_MARKER_BIT_SIZE)
.ok_or(MetadataError::NumericalOverflowError)? as usize)
}
fn get_index(offset_from_start: usize) -> Result<usize, ProgramError> {
let index = offset_from_start
.checked_div(8)
.ok_or(MetadataError::NumericalOverflowError)?;
if index > 30 {
return Err(MetadataError::InvalidEditionIndex.into());
}
Ok(index)
}
fn get_offset_from_right(offset_from_start: usize) -> Result<u32, ProgramError> {
Ok(7 - offset_from_start
.checked_rem(8)
.ok_or(MetadataError::NumericalOverflowError)? as u32)
}
pub fn get_index_and_mask(edition: u64) -> Result<(usize, u8), ProgramError> {
let offset_from_start = EditionMarker::get_edition_offset_from_starting_index(edition)?;
let index = EditionMarker::get_index(offset_from_start)?;
let my_position_in_index_starting_from_right =
EditionMarker::get_offset_from_right(offset_from_start)?;
Ok((index, u8::pow(2, my_position_in_index_starting_from_right)))
}
pub fn edition_taken(&self, edition: u64) -> Result<bool, ProgramError> {
let (index, mask) = EditionMarker::get_index_and_mask(edition)?;
let applied_mask = self.ledger[index] & mask;
Ok(applied_mask != 0)
}
pub fn insert_edition(&mut self, edition: u64) -> ProgramResult {
let (index, mask) = EditionMarker::get_index_and_mask(edition)?;
self.ledger[index] |= mask;
Ok(())
}
}
#[cfg(test)]
mod tests {
use borsh::BorshSerialize;
use solana_program::account_info::AccountInfo;
use solana_sdk::{signature::Keypair, signer::Signer};
use crate::{
error::MetadataError,
state::{EditionMarker, Key, Metadata, TokenMetadataAccount},
ID,
};
#[test]
fn successfully_deserialize() {
let expected_data = EditionMarker::default();
let mut buf = Vec::new();
expected_data.serialize(&mut buf).unwrap();
EditionMarker::pad_length(&mut buf).unwrap();
let pubkey = Keypair::new().pubkey();
let owner = &ID;
let mut lamports = 1_000_000_000;
let mut data = buf.clone();
let account_info = AccountInfo::new(
&pubkey,
false,
true,
&mut lamports,
&mut data,
owner,
false,
1_000_000_000,
);
let data = EditionMarker::from_account_info(&account_info).unwrap();
assert_eq!(data.key, Key::EditionMarker);
assert_eq!(data, expected_data);
}
#[test]
fn deserializing_wrong_account_type_fails() {
let wrong_type = Metadata::default();
let mut buf = Vec::new();
wrong_type.serialize(&mut buf).unwrap();
Metadata::pad_length(&mut buf).unwrap();
let pubkey = Keypair::new().pubkey();
let owner = &ID;
let mut lamports = 1_000_000_000;
let mut data = buf.clone();
let account_info = AccountInfo::new(
&pubkey,
false,
true,
&mut lamports,
&mut data,
owner,
false,
1_000_000_000,
);
let error = EditionMarker::from_account_info(&account_info).unwrap_err();
assert_eq!(error, MetadataError::DataTypeMismatch.into());
}
}