function newAnchor(
    bytes32 root,
    uint height,
    uint[] memory signers,
    uint8[] memory vs,
    bytes32[] memory rs,
    bytes32[] memory ss
) public {
    require(height > _anchorHeight + _tAnchor, "Next anchor height not reached");
    bytes32 message = keccak256(abi.encodePacked(root, height, _nonce, _contractId, "R"));
    validateSignatures(message, signers, vs, rs, ss);
    _anchorRoot = root;
    _anchorHeight = height;
    _nonce += 1;
    emit anchorEvent(root, height);
}