v0.8.0

StarkNet

• Support paying fees for transactions
• System calls:
  • Add transaction hash and chain id to the TxInfo struct. See here
• API:
  • estimate_fee
  • get_transaction_trace - shows the internal calls executed by the transactions in a tree structure. See here
  • get_transaction returns a new field max_fee and the calldata field was changed from decimal to hex
• Add an option to cancel an L1->L2 message. See here
• Testing framework:
  • Add replace_abi() function (useful for the proxy pattern)
• Technical changes:
  • Add version and max_fee fields to the transaction hash
  • Account contracts should have an __execute__ function. To compile a contract with such an external function, you should pass the --account_contract flag to the compiler.

Cairo:

• Syntax:
  • Add new operator. See here
  • Add named tuple types. See here
  • Add type aliases. See here
  • Support escape sequences in short strings (currently, only \x**)
  • Add codeoffset type for labels
  • Support negative values in dw statements
  • Forbid using nondet in references (since it may lead to unexpected behavior)
• Standard library:
  • Add blake2s to the common library. See here
  • New functions: horner_eval and usort
  • Rename small_merkle_tree to small_merkle_tree_update
• Other:
  • Support including local variables and arguments in error messages. See here