In 2018, @expede made efforts to standardize status codes for L1 contracts using erc-1066, akin to HTTP status codes. Hexadecimal codes were preferred there too for their neutrality and parsing simplicity compared to strings. The future evolution of L2 platforms may diverge from current practices. The primary objective was to enhance contract interface understanding of inter-contract message statuses. Is there an opportunity to unify L2 and L1 statuses under a single standard? ERC-1066: Ethereum Status Codes (ESC)