contract Validator is Ownable, SignerManageable, Configurable, PaymentHashable {
    using SafeMathIntLib for int256;
    using SafeMathUintLib for uint256;

    //
    // Constructor
    // -----------------------------------------------------------------------------------------------------------------
    constructor(address deployer, address signerManager) Ownable(deployer) SignerManageable(signerManager) public {
    }

    //
    // Functions
    // -----------------------------------------------------------------------------------------------------------------
    function isGenuineOperatorSignature(bytes32 hash, NahmiiTypesLib.Signature memory signature)
    public
    view
    returns (bool)
    {
        return isSignedByRegisteredSigner(hash, signature.v, signature.r, signature.s);
    }

    function isGenuineWalletSignature(bytes32 hash, NahmiiTypesLib.Signature memory signature, address wallet)
    public
    pure
    returns (bool)
    {
        return isSignedBy(hash, signature.v, signature.r, signature.s, wallet);
    }

    function isGenuinePaymentWalletHash(PaymentTypesLib.Payment memory payment)
    public
    view
    returns (bool)
    {
        return paymentHasher.hashPaymentAsWallet(payment) == payment.seals.wallet.hash;
    }

    function isGenuinePaymentOperatorHash(PaymentTypesLib.Payment memory payment)
    public
    view
    returns (bool)
    {
        return paymentHasher.hashPaymentAsOperator(payment) == payment.seals.operator.hash;
    }

    function isGenuinePaymentWalletSeal(PaymentTypesLib.Payment memory payment)
    public
    view
    returns (bool)
    {
        return isGenuinePaymentWalletHash(payment)
        && isGenuineWalletSignature(payment.seals.wallet.hash, payment.seals.wallet.signature, payment.sender.wallet);
    }

    function isGenuinePaymentOperatorSeal(PaymentTypesLib.Payment memory payment)
    public
    view
    returns (bool)
    {
        return isGenuinePaymentOperatorHash(payment)
        && isGenuineOperatorSignature(payment.seals.operator.hash, payment.seals.operator.signature);
    }

    function isGenuinePaymentSeals(PaymentTypesLib.Payment memory payment)
    public
    view
    returns (bool)
    {
        return isGenuinePaymentWalletSeal(payment) && isGenuinePaymentOperatorSeal(payment);
    }

    /// @dev Logics of this function only applies to FT
    function isGenuinePaymentFeeOfFungible(PaymentTypesLib.Payment memory payment)
    public
    view
    returns (bool)
    {
        int256 feePartsPer = int256(ConstantsLib.PARTS_PER());

        int256 feeAmount = payment.amount
        .mul(
            configuration.currencyPaymentFee(
                payment.blockNumber, payment.currency.ct, payment.currency.id, payment.amount
            )
        ).div(feePartsPer);

        if (1 > feeAmount)
            feeAmount = 1;

        return (payment.sender.fees.single.amount == feeAmount);
    }

    /// @dev Logics of this function only applies to NFT
    function isGenuinePaymentFeeOfNonFungible(PaymentTypesLib.Payment memory payment)
    public
    view
    returns (bool)
    {
        (address feeCurrencyCt, uint256 feeCurrencyId) = configuration.feeCurrency(
            payment.blockNumber, payment.currency.ct, payment.currency.id
        );

        return feeCurrencyCt == payment.sender.fees.single.currency.ct
        && feeCurrencyId == payment.sender.fees.single.currency.id;
    }

    /// @dev Logics of this function only applies to FT
    function isGenuinePaymentSenderOfFungible(PaymentTypesLib.Payment memory payment)
    public
    view
    returns (bool)
    {
        return (payment.sender.wallet != payment.recipient.wallet)
        && (!signerManager.isSigner(payment.sender.wallet))
        && (payment.sender.balances.current == payment.sender.balances.previous.sub(payment.transfers.single).sub(payment.sender.fees.single.amount));
    }

    /// @dev Logics of this function only applies to FT
    function isGenuinePaymentRecipientOfFungible(PaymentTypesLib.Payment memory payment)
    public
    pure
    returns (bool)
    {
        return (payment.sender.wallet != payment.recipient.wallet)
        && (payment.recipient.balances.current == payment.recipient.balances.previous.add(payment.transfers.single));
    }

    /// @dev Logics of this function only applies to NFT
    function isGenuinePaymentSenderOfNonFungible(PaymentTypesLib.Payment memory payment)
    public
    view
    returns (bool)
    {
        return (payment.sender.wallet != payment.recipient.wallet)
        && (!signerManager.isSigner(payment.sender.wallet));
    }

    /// @dev Logics of this function only applies to NFT
    function isGenuinePaymentRecipientOfNonFungible(PaymentTypesLib.Payment memory payment)
    public
    pure
    returns (bool)
    {
        return (payment.sender.wallet != payment.recipient.wallet);
    }

    function isSuccessivePaymentsPartyNonces(
        PaymentTypesLib.Payment memory firstPayment,
        PaymentTypesLib.PaymentPartyRole firstPaymentPartyRole,
        PaymentTypesLib.Payment memory lastPayment,
        PaymentTypesLib.PaymentPartyRole lastPaymentPartyRole
    )
    public
    pure
    returns (bool)
    {
        uint256 firstNonce = (PaymentTypesLib.PaymentPartyRole.Sender == firstPaymentPartyRole ? firstPayment.sender.nonce : firstPayment.recipient.nonce);
        uint256 lastNonce = (PaymentTypesLib.PaymentPartyRole.Sender == lastPaymentPartyRole ? lastPayment.sender.nonce : lastPayment.recipient.nonce);
        return lastNonce == firstNonce.add(1);
    }

    function isGenuineSuccessivePaymentsBalances(
        PaymentTypesLib.Payment memory firstPayment,
        PaymentTypesLib.PaymentPartyRole firstPaymentPartyRole,
        PaymentTypesLib.Payment memory lastPayment,
        PaymentTypesLib.PaymentPartyRole lastPaymentPartyRole,
        int256 delta
    )
    public
    pure
    returns (bool)
    {
        NahmiiTypesLib.CurrentPreviousInt256 memory firstCurrentPreviousBalances = (PaymentTypesLib.PaymentPartyRole.Sender == firstPaymentPartyRole ? firstPayment.sender.balances : firstPayment.recipient.balances);
        NahmiiTypesLib.CurrentPreviousInt256 memory lastCurrentPreviousBalances = (PaymentTypesLib.PaymentPartyRole.Sender == lastPaymentPartyRole ? lastPayment.sender.balances : lastPayment.recipient.balances);

        return lastCurrentPreviousBalances.previous == firstCurrentPreviousBalances.current.add(delta);
    }

    function isGenuineSuccessivePaymentsTotalFees(
        PaymentTypesLib.Payment memory firstPayment,
        PaymentTypesLib.Payment memory lastPayment
    )
    public
    pure
    returns (bool)
    {
        MonetaryTypesLib.Figure memory firstTotalFee = getProtocolFigureByCurrency(firstPayment.sender.fees.total, lastPayment.sender.fees.single.currency);
        MonetaryTypesLib.Figure memory lastTotalFee = getProtocolFigureByCurrency(lastPayment.sender.fees.total, lastPayment.sender.fees.single.currency);
        return lastTotalFee.amount == firstTotalFee.amount.add(lastPayment.sender.fees.single.amount);
    }

    function isPaymentParty(PaymentTypesLib.Payment memory payment, address wallet)
    public
    pure
    returns (bool)
    {
        return wallet == payment.sender.wallet || wallet == payment.recipient.wallet;
    }

    function isPaymentSender(PaymentTypesLib.Payment memory payment, address wallet)
    public
    pure
    returns (bool)
    {
        return wallet == payment.sender.wallet;
    }

    function isPaymentRecipient(PaymentTypesLib.Payment memory payment, address wallet)
    public
    pure
    returns (bool)
    {
        return wallet == payment.recipient.wallet;
    }

    function isPaymentCurrency(PaymentTypesLib.Payment memory payment, MonetaryTypesLib.Currency memory currency)
    public
    pure
    returns (bool)
    {
        return currency.ct == payment.currency.ct && currency.id == payment.currency.id;
    }

    function isPaymentCurrencyNonFungible(PaymentTypesLib.Payment memory payment)
    public
    pure
    returns (bool)
    {
        return payment.currency.ct != payment.sender.fees.single.currency.ct
        || payment.currency.id != payment.sender.fees.single.currency.id;
    }

    //
    // Private unctions
    // -----------------------------------------------------------------------------------------------------------------
    function getProtocolFigureByCurrency(NahmiiTypesLib.OriginFigure[] memory originFigures, MonetaryTypesLib.Currency memory currency)
    private
    pure
    returns (MonetaryTypesLib.Figure memory) {
        for (uint256 i = 0; i < originFigures.length; i++)
            if (originFigures[i].figure.currency.ct == currency.ct && originFigures[i].figure.currency.id == currency.id
            && originFigures[i].originId == 0)
                return originFigures[i].figure;
        return MonetaryTypesLib.Figure(0, currency);
    }
}
/**
 * @title Validator
 * @notice An ownable that validates valuable types (e.g. payment)
 */
function isGenuinePaymentFeeOfFungible(PaymentTypesLib.Payment memory payment)
public
view
returns (bool)
{
    int256 feePartsPer = int256(ConstantsLib.PARTS_PER());

    int256 feeAmount = payment.amount
    .mul(
        configuration.currencyPaymentFee(
            payment.blockNumber, payment.currency.ct, payment.currency.id, payment.amount
        )
    ).div(feePartsPer);

    if (1 > feeAmount)
        feeAmount = 1;

    return (payment.sender.fees.single.amount == feeAmount);
}

/// @dev Logics of this function only applies to FT