[{"type":"report","id":"BLC-STUDY-1277","title":"New Opcode to check if a chainID is part of the history of chainIDs","author":[{"literal":"Ronan Sandford"}],"issued":{"date-parts":[[2019]]},"publisher":"Ronan Sandford","URL":"https://github.com/ethereum/EIPs/blob/master/EIPS/eip-1959.md","note":"Rights status: Licensed for redistribution. Not a licence to republish the paper."}]