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fix(token): size accounts for mint-required extensions - #442
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Aursen
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Oct 20, 2026
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CreateAccountfails for Token-2022 mints with required account extensions because it allocates the base account size from an always-empty extension list.Use the SPL interface's
try_calculate_account_len_from_mint_datahelper to derive the required account size before calculating rent and buildinginitialize_account3. Remove the unused private extension list and preserve the explicit classic-token program path.Missing or malformed Token-2022 mint data now returns an error before transaction submission. These invalid inputs therefore have default metadata and incur no transaction fee.
Add regressions for TransferFeeConfig, TransferHook, and NonTransferable mints; supplied account keys and separate owners; minting and checked fee transfers; explicit classic SPL use with Token-2022 enabled; and invalid/missing mints without account creation. The extended-mint regression fails on the base and passes with this fix.
Fixes #440.
Validation on local macOS:
cargo test -p litesvm-token --locked: 5 passed.cargo test -p litesvm-token --features token-2022 --locked: 10 passed.cargo test -p litesvm-token --no-default-features --features token-2022 --locked: 10 passed.cargo clippy -p litesvm-token --all-targets --features token-2022 --locked -- -D warnings: passed.cargo +nightly fmt --all -- --check: passed.git diff --check: passed.