What's Changed
- BURN: Skip zero-amount changes and clear empty asset slots by @Dentosal in #1008
- Do not write to storage when minting zero tokens by @Dentosal in #1009
- Storage cache: Use HashMap, group by ContractId by @Dentosal in #1010
- Rename default_gas_costs to default_gas_costs_for_tests by @Dentosal in #1011
- Release v0.66.4 by @Dentosal in #1012
Full Changelog: v0.66.3...v0.66.4