[{"inputs":[{"internalType":"uint256","name":"n","type":"uint256"}],"name":"getBlockhash","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"n","type":"uint256"}],"name":"store","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"storeEarliest","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"n","type":"uint256"},{"internalType":"bytes","name":"header","type":"bytes"}],"name":"storeVerifyHeader","outputs":[],"stateMutability":"nonpayable","type":"function"}]