OP: Optimism Upgrade 21 proposes L1 contract changes for interop: ETHLockbox on every chain, permissionless proof deleti

OP: Optimism Upgrade 21 proposes L1 contract changes for interop: ETHLockbox on every chain, permissionless proof deleti | Hanami

OP: Optimism Upgrade 21 proposes L1 contract changes for interop: ETHLockbox on every chain, permissionless proof deletion, bridge hardening