staking

var (
	//contract address, 10000
	StakingContractAddress = [20]byte{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x27, 0x10}
	/*------selector------*/
	/*interface Staking {
		// following methods can only be called by EOA
		//0x24d1ed5d
		function createValidator(address rewardTo, bytes32 introduction, bytes32 pubkey) external;
		//0x9dc159b6
		function editValidator(address rewardTo, bytes32 introduction) external;
		//0xa4874d77
		function retire() external;
		//0xf2016e8e
		function increaseMinGasPrice() external;
		//0x696e6ad2
		function decreaseMinGasPrice() external;
		//30326c17
		function proposal(uint target) external;
		//0121b93f
		function vote(uint target) external;
		//373058b8
		function executeProposal() external;
		//8d337b81
		function getVote(address validator) external view returns (uint)

		// sumVotingPower can only be called by other smart contracts
		//9ce06909
		function sumVotingPower(address[] calldata addrList) external override returns (uint summedPower, uint totalPower)
	}*/
	SelectorCreateValidator     = [4]byte{0x24, 0xd1, 0xed, 0x5d}
	SelectorEditValidator       = [4]byte{0x9d, 0xc1, 0x59, 0xb6}
	SelectorRetire              = [4]byte{0xa4, 0x87, 0x4d, 0x77}
	SelectorIncreaseMinGasPrice = [4]byte{0xf2, 0x01, 0x6e, 0x8e}
	SelectorDecreaseMinGasPrice = [4]byte{0x69, 0x6e, 0x6a, 0xd2}
	SelectorProposal            = [4]byte{0x30, 0x32, 0x6c, 0x17}
	SelectorVote                = [4]byte{0x01, 0x21, 0xb9, 0x3f}
	SelectorExecuteProposal     = [4]byte{0x37, 0x30, 0x58, 0xb8}
	SelectorGetVote             = [4]byte{0x8d, 0x33, 0x7b, 0x81}
	SelectorSumVotingPower      = [4]byte{0x9c, 0xe0, 0x69, 0x09}

	//slot
	SlotStakingInfo               = strings.Repeat(string([]byte{0}), 32)
	SlotAllBurnt                  = strings.Repeat(string([]byte{0}), 31) + string([]byte{1})
	SlotMinGasPrice               = strings.Repeat(string([]byte{0}), 31) + string([]byte{2})
	SlotLastMinGasPrice           = strings.Repeat(string([]byte{0}), 31) + string([]byte{3})
	SlotMinGasPriceProposalTarget = strings.Repeat(string([]byte{0}), 31) + string([]byte{4})
	SlotVoters                    = strings.Repeat(string([]byte{0}), 31) + string([]byte{5})

	// slot in hex
	SlotMinGasPriceHex = hex.EncodeToString([]byte(SlotMinGasPrice))
)

var (
	/*------param------*/
	//staking
	InitialStakingAmount = uint256.NewInt(0)
	MinimumStakingAmount = uint256.NewInt(0)
	SlashedStakingAmount = uint256.NewInt(0)

	GasOfValidatorOp   uint64 = 400_000
	GasOfMinGasPriceOp uint64 = 50_000

	//minGasPrice
	DefaultMinGasPrice          uint64 = param.DefaultMinGasPrice //10gwei
	MinGasPriceDeltaRateInBlock uint64 = 16
	MinGasPriceDeltaRate        uint64 = 5               //gas delta rate every proposal can change
	MinGasPriceUpperBound       uint64 = 500_000_000_000 //500gwei
	MinGasPriceLowerBoundOld    uint64 = 1_000_000_000   //1gwei
	MinGasPriceLowerBound       uint64 = 10_000_000      //0.01gwei
	DefaultProposalDuration     uint64 = 60 * 60 * 24    //24hour
)

var (
	/*------error info------*/
	InvalidCallData                   = errors.New("invalid call data")
	InvalidSelector                   = errors.New("invalid selector")
	BalanceNotEnough                  = errors.New("balance is not enough")
	NoSuchValidator                   = errors.New("no such validator")
	ValidatorNotActive                = errors.New("validator not active")
	OperatorNotValidator              = errors.New("minGasPrice operator not validator or its rewardTo")
	MinGasPriceTooBig                 = errors.New("minGasPrice bigger than allowed highest value")
	MinGasPriceTooSmall               = errors.New("minGasPrice smaller than allowed lowest value")
	InvalidArgument                   = errors.New("invalid argument")
	CreateValidatorCoinLtInitAmount   = errors.New("validator's staking coin less than init amount")
	MinGasPriceExceedBlockChangeDelta = errors.New("the amount of variation in minGasPrice exceeds the allowable range")
	StillInProposal                   = errors.New("still in proposal")
	NotInProposal                     = errors.New("not in proposal")
	TargetExceedChangeDelta           = errors.New("minGasPrice target exceeds the allowable range")
	ProposalHasFinished               = errors.New("proposal has finished")
	ProposalNotFinished               = errors.New("proposal not finished")
)

var (
	SlotValidatorsMap   = strings.Repeat(string([]byte{0}), 31) + string([]byte{134})
	SlotValidatorsArray = strings.Repeat(string([]byte{0}), 31) + string([]byte{135})

	CoindayUnit = uint256.NewInt(0).Mul(uint256.NewInt(24*60*60), uint256.NewInt(Uint64_1e18))
)

var ABI = ethutils.MustParseABI(`
[
	{
		"inputs": [
			{
				"internalType": "address",
				"name": "rewardTo",
				"type": "address"
			},
			{
				"internalType": "bytes32",
				"name": "introduction",
				"type": "bytes32"
			},
			{
				"internalType": "bytes32",
				"name": "pubkey",
				"type": "bytes32"
			}
		],
		"name": "createValidator",
		"outputs": [],
		"stateMutability": "nonpayable",
		"type": "function"
	},
	{
		"inputs": [],
		"name": "decreaseMinGasPrice",
		"outputs": [],
		"stateMutability": "nonpayable",
		"type": "function"
	},
	{
		"inputs": [
			{
				"internalType": "address",
				"name": "rewardTo",
				"type": "address"
			},
			{
				"internalType": "bytes32",
				"name": "introduction",
				"type": "bytes32"
			}
		],
		"name": "editValidator",
		"outputs": [],
		"stateMutability": "nonpayable",
		"type": "function"
	},
	{
		"inputs": [],
		"name": "increaseMinGasPrice",
		"outputs": [],
		"stateMutability": "nonpayable",
		"type": "function"
	},
	{
		"inputs": [],
		"name": "retire",
		"outputs": [],
		"stateMutability": "nonpayable",
		"type": "function"
	},
    {
      "inputs": [
        {
          "internalType": "address[]",
          "name": "addrList",
          "type": "address[]"
        }
      ],
      "name": "sumVotingPower",
      "outputs": [
        {
          "internalType": "uint256",
          "name": "summedPower",
          "type": "uint256"
        },
        {
          "internalType": "uint256",
          "name": "totalPower",
          "type": "uint256"
        }
      ],
      "stateMutability": "nonpayable",
      "type": "function"
    },
	{
		"inputs": [],
		"name": "executeProposal",
		"outputs": [],
		"stateMutability": "nonpayable",
		"type": "function"
	},
	{
		"inputs": [
			{
				"internalType": "address",
				"name": "validator",
				"type": "address"
			}
		],
		"name": "getVote",
		"outputs": [
			{
				"internalType": "uint256",
				"name": "",
				"type": "uint256"
			}
		],
		"stateMutability": "view",
		"type": "function"
	},
	{
		"inputs": [
			{
				"internalType": "uint256",
				"name": "target",
				"type": "uint256"
			}
		],
		"name": "proposal",
		"outputs": [],
		"stateMutability": "nonpayable",
		"type": "function"
	},
	{
		"inputs": [
			{
				"internalType": "uint256",
				"name": "target",
				"type": "uint256"
			}
		],
		"name": "vote",
		"outputs": [],
		"stateMutability": "nonpayable",
		"type": "function"
	}
]
`)