{"abi":[{"constant":true,"inputs":[{"internalType":"bytes32","name":"leaf","type":"bytes32"},{"internalType":"uint256","name":"index","type":"uint256"},{"internalType":"bytes32","name":"rootHash","type":"bytes32"},{"internalType":"bytes","name":"proof","type":"bytes"}],"name":"checkMembership","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"pure","type":"function"}]}