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https://github.com/logos-blockchain/lez-programs.git
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fe4c7a96da
Add an optional mint authority to fungible tokens for controlled supply:
create with a designated minter, mint additional supply, rotate the
authority to a new key, or permanently revoke it to fix the supply.
The authority is stored inline on `TokenDefinition::Fungible` as
`authority: Option<AccountId>` (`Some(id)` = mintable by `id`, `None` =
fixed supply). Keeping it a plain `Option<AccountId>` rather than a custom
wrapper type leaves account state decodable by `spel inspect`; the
require/rotate/revoke guard logic lives inline in the handlers.
LEZ rejects a transaction that lists the same account id twice, so one
instruction cannot statically express both "the definition account is the
authority and signs" (self/PDA authority) and "a distinct rotated account
signs" (external authority) — they need opposite signer markers. Each
privileged operation is therefore split into a self and an external
variant:
- `Mint` / `SetAuthority` — the definition account is the signer.
- `MintWithAuthority` / `SetAuthorityWithAuthority` — a distinct authority
account is the signer; the definition account does not sign.
Creation via `NewFungibleDefinition { mint_authority, .. }`; an all-zero
authority id is rejected. The AMM's LP token uses self/PDA authority — its
stored authority is the LP definition PDA, minted only by the pool via
chained calls.
Covered by token unit tests and zkVM integration tests: creation with and
without an authority, self- and external-authority mint, rotation, and
external rotate/revoke. IDLs regenerated.
106 lines
3.1 KiB
Rust
106 lines
3.1 KiB
Rust
use nssa_core::{
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account::{AccountWithMetadata, Data},
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program::AccountPostState,
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};
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use token_core::{TokenDefinition, TokenHolding};
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pub fn burn(
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definition_account: AccountWithMetadata,
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user_holding_account: AccountWithMetadata,
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amount_to_burn: u128,
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) -> Vec<AccountPostState> {
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assert!(
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user_holding_account.is_authorized,
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"Authorization is missing"
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);
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let mut definition = TokenDefinition::try_from(&definition_account.account.data)
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.expect("Token Definition account must be valid");
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let mut holding = TokenHolding::try_from(&user_holding_account.account.data)
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.expect("Token Holding account must be valid");
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assert_eq!(
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definition_account.account_id,
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holding.definition_id(),
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"Mismatch Token Definition and Token Holding"
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);
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match (&mut definition, &mut holding) {
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(
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TokenDefinition::Fungible {
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name: _,
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metadata_id: _,
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total_supply,
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authority: _,
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},
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TokenHolding::Fungible {
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definition_id: _,
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balance,
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},
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) => {
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*balance = balance
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.checked_sub(amount_to_burn)
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.expect("Insufficient balance to burn");
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*total_supply = total_supply
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.checked_sub(amount_to_burn)
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.expect("Total supply underflow");
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}
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(
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TokenDefinition::NonFungible {
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name: _,
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printable_supply,
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metadata_id: _,
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},
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TokenHolding::NftMaster {
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definition_id: _,
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print_balance,
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},
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) => {
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*printable_supply = printable_supply
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.checked_sub(amount_to_burn)
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.expect("Printable supply underflow");
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*print_balance = print_balance
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.checked_sub(amount_to_burn)
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.expect("Insufficient balance to burn");
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}
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(
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TokenDefinition::NonFungible {
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name: _,
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printable_supply,
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metadata_id: _,
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},
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TokenHolding::NftPrintedCopy {
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definition_id: _,
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owned,
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},
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) => {
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assert_eq!(
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amount_to_burn, 1,
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"Invalid balance to burn for NFT Printed Copy"
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);
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assert!(*owned, "Cannot burn unowned NFT Printed Copy");
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*printable_supply = printable_supply
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.checked_sub(1)
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.expect("Printable supply underflow");
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*owned = false;
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}
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_ => panic!("Mismatched Token Definition and Token Holding types"),
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}
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let mut definition_post = definition_account.account;
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definition_post.data = Data::from(&definition);
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let mut holding_post = user_holding_account.account;
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holding_post.data = Data::from(&holding);
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vec![
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AccountPostState::new(definition_post),
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AccountPostState::new(holding_post),
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]
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}
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