Staking Manager (PoS Manager)

function stake(uint256 amount, uint256 heimdallFee, bool acceptDelegation, bytes calldata signerPubkey) public;
function stakeFor(address user, uint256 amount, uint256 heimdallFee, bool acceptDelegation, bytes memory signerPubkey) public;

function unstakeClaim(uint256 validatorId) public;

function restake(uint256 validatorId, uint256 amount, bool stakeRewards) public;

function withdrawRewards(uint256 validatorId) public;

function updateSigner(uint256 validatorId, bytes memory signerPubkey) public;

function topUpForFee(uint256 validatorId, uint256 heimdallFee) public;

function claimFee(uint256 validatorId, uint256 accumSlashedAmount, uint256 accumFeeAmount, uint256 index, bytes memory proof) public;

function startAuction(uint256 validatorId, uint256 amount) external;

function confirmAuctionBid(uint256 validatorId, uint256 heimdallFee, bool acceptDelegation, bytes calldata signerPubkey) external;

function checkSignatures(uint256 blockInterval, bytes32 voteHash, bytes32 stateRoot, bytes memory sigs) public;

struct State { int256 amount; int256 stakerCount; }
mapping(uint256 => State) public validatorState;