[{"type":"report","id":"BLC-STUDY-0294","title":"New opcodes: RETURNDATASIZE and RETURNDATACOPY","author":[{"literal":"Christian Reitwiessner"}],"issued":{"date-parts":[[2017]]},"publisher":"Christian Reitwiessner","URL":"https://eips.ethereum.org/EIPS/eip-211","note":"Rights status: Official external source only. Not a licence to republish the paper."}]