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  <xsd:element id="hypd_ProceedsOfStockIssuedDuringPeriodGross" name="ProceedsOfStockIssuedDuringPeriodGross" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" abstract="false" />
  <xsd:element id="hypd_PrepaidExpensesAndOtherCurrentAssetsDisclosureTextBlock" name="PrepaidExpensesAndOtherCurrentAssetsDisclosureTextBlock" nillable="true" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element name="PayrollTaxesReceivable" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" nillable="true" id="hypd_PayrollTaxesReceivable" substitutionGroup="xbrli:item" xbrli:balance="debit" />
  <xsd:element name="ExercisePriceOneMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="hypd_ExercisePriceOneMember" substitutionGroup="xbrli:item" />
  <xsd:element name="ExercisePriceTwoMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="hypd_ExercisePriceTwoMember" substitutionGroup="xbrli:item" />
  <xsd:element name="ExercisePriceThreeMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="hypd_ExercisePriceThreeMember" substitutionGroup="xbrli:item" />
  <xsd:element name="ExercisePriceFourMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="hypd_ExercisePriceFourMember" substitutionGroup="xbrli:item" />
  <xsd:element id="hypd_ScheduleOfWarrantsOutstandingTableTextBlock" name="ScheduleOfWarrantsOutstandingTableTextBlock" nillable="true" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="hypd_OperatingLossCarryForwardsExpirationTerm" name="OperatingLossCarryForwardsExpirationTerm" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="hypd_OmnibusStockIncentivePlan2018Member" name="OmnibusStockIncentivePlan2018Member" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="hypd_NetOperatingLossAnnualUtilizationLimitAsPerInternalRevenueCode" name="NetOperatingLossAnnualUtilizationLimitAsPerInternalRevenueCode" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <xsd:element id="hypd_DeferredIncomeTaxExpenseBenefitBeforeAdjustmentsForChangeInValuationAllowance" name="DeferredIncomeTaxExpenseBenefitBeforeAdjustmentsForChangeInValuationAllowance" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <xsd:element id="hypd_NumberOfMonthlyPayments" name="NumberOfMonthlyPayments" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" abstract="false" />
  <xsd:element id="hypd_PurchaseOfInsurancePremiumFinancedByShortTermNotePayable" name="PurchaseOfInsurancePremiumFinancedByShortTermNotePayable" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <xsd:element id="hypd_NotesPayableDisclosureTextBlock" name="NotesPayableDisclosureTextBlock" nillable="true" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="hypd_ScheduleOfNotesPayableTableTextBlock" name="ScheduleOfNotesPayableTableTextBlock" nillable="true" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="hypd_ShareBasedCompensationArrangementByShareBasedPaymentAwardCashFeePaid" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardCashFeePaid" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <xsd:element id="hypd_BauschLicenseAgreementMember" name="BauschLicenseAgreementMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="hypd_ArcticVisionLicenseAgreementMember" name="ArcticVisionLicenseAgreementMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="hypd_ClassOfWarrantsOrRightsOutstandingRollforward" name="ClassOfWarrantsOrRightsOutstandingRollforward" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" abstract="true" />
  <xsd:element id="hypd_ClassOfWarrantOrRightExercised" name="ClassOfWarrantOrRightExercised" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="hypd_ClassOfWarrantOrRightExercisable" name="ClassOfWarrantOrRightExercisable" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" />
  <xsd:element id="hypd_ClassOfWarrantsOrRightsWeightedAverageExercisePriceRollforward" name="ClassOfWarrantsOrRightsWeightedAverageExercisePriceRollforward" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" abstract="true" />
  <xsd:element id="hypd_ClassOfWarrantOrRightOutstandingWeightedAverageExercisePrice" name="ClassOfWarrantOrRightOutstandingWeightedAverageExercisePrice" nillable="true" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" />
  <xsd:element id="hypd_ClassOfWarrantOrRightExercisedWeightedAverageExercisePrice" name="ClassOfWarrantOrRightExercisedWeightedAverageExercisePrice" nillable="true" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="hypd_ClassOfWarrantOrRightExercisableWeightedAverageExercisePrice" name="ClassOfWarrantOrRightExercisableWeightedAverageExercisePrice" nillable="true" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" />
  <xsd:element id="hypd_ClassOfWarrantOrRightOutstandingWeightedAverageRemainingLife" name="ClassOfWarrantOrRightOutstandingWeightedAverageRemainingLife" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="hypd_ClassOfWarrantOrRightExercisableWeightedAverageRemainingLife" name="ClassOfWarrantOrRightExercisableWeightedAverageRemainingLife" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <xsd:element id="hypd_WarrantsAtExercisePriceOneMember" name="WarrantsAtExercisePriceOneMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="hypd_WarrantsAtExercisePriceTwoMember" name="WarrantsAtExercisePriceTwoMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="hypd_WarrantsAtExercisePriceThreeMember" name="WarrantsAtExercisePriceThreeMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="hypd_WarrantsAtExercisePriceFourMember" name="WarrantsAtExercisePriceFourMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="hypd_IncreaseDecreaseInLicenseFeeAndExpenseReimbursementsReceivables" name="IncreaseDecreaseInLicenseFeeAndExpenseReimbursementsReceivables" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <xsd:element id="hypd_PrepaidGeneralAndAdministrativeExpenses" name="PrepaidGeneralAndAdministrativeExpenses" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <xsd:element id="hypd_AmortizationOfDebtDiscount" name="AmortizationOfDebtDiscount" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <xsd:element id="hypd_PeriodAxis" name="PeriodAxis" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="hypd_PeriodTypeDomain" name="PeriodTypeDomain" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="hypd_AtMarketOfferingMember" name="AtMarketOfferingMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="hypd_PercentageOfGrossSalesOnCommonStock" name="PercentageOfGrossSalesOnCommonStock" nillable="true" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" />
  <xsd:element id="hypd_PrepaidPatentExpense" name="PrepaidPatentExpense" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" abstract="false" />
  <xsd:element name="ProceedsFromIssuanceOfCommonStockNetOfIssuanceCosts" id="hypd_ProceedsFromIssuanceOfCommonStockNetOfIssuanceCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="StockIssuedAtMarketOfferingDuringPeriodValueNewIssues" id="hypd_StockIssuedAtMarketOfferingDuringPeriodValueNewIssues" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="StockIssuedAtMarketOfferingDuringPeriodSharesNewIssues" id="hypd_StockIssuedAtMarketOfferingDuringPeriodSharesNewIssues" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="RestrictedStockIssuedDuringPeriodValueNewIssues" id="hypd_RestrictedStockIssuedDuringPeriodValueNewIssues" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="RestrictedStockIssuedDuringPeriodSharesNewIssues" id="hypd_RestrictedStockIssuedDuringPeriodSharesNewIssues" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="IssuanceOfCommonStockRelatedToVestedRestrictedStockUnits" id="hypd_IssuanceOfCommonStockRelatedToVestedRestrictedStockUnits" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ProceedsFromIssuanceOfCommonStockAtMarketOffering" id="hypd_ProceedsFromIssuanceOfCommonStockAtMarketOffering" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ArcticVisionLicenseAgreementPolicyTextBlock" id="hypd_ArcticVisionLicenseAgreementPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="BauschLicenseAgreementPolicyTextBlock" id="hypd_BauschLicenseAgreementPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="PrefundedWarrantsMember" id="hypd_PrefundedWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="InvestorWarrantsMember" id="hypd_InvestorWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="PercentageOfRoyaltyToBeTransferredRange1" id="hypd_PercentageOfRoyaltyToBeTransferredRange1" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="StateJurisdictionMember" id="hypd_StateJurisdictionMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="NotesPayableCurrentNetOfDebtDiscountCurrentCurrentPortion" id="hypd_NotesPayableCurrentNetOfDebtDiscountCurrentCurrentPortion" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="December2021SalesAgreementMember" id="hypd_December2021SalesAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsOutstandingWeightedAverageExercisePriceRollforward" id="hypd_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsOutstandingWeightedAverageExercisePriceRollforward" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsNonVestedOutstandingWeightedAverageExercisePrice" id="hypd_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsNonVestedOutstandingWeightedAverageExercisePrice" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsGrantsInPeriodWeightedAverageExercisePrice" id="hypd_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsGrantsInPeriodWeightedAverageExercisePrice" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsVestedInPeriodWeightedAverageExercisePrice" id="hypd_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsVestedInPeriodWeightedAverageExercisePrice" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsForfeitedInPeriodWeightedAverageExercisePrice" id="hypd_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsForfeitedInPeriodWeightedAverageExercisePrice" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedRSUsUndeliveredNumber" id="hypd_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedRSUsUndeliveredNumber" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsVestedRSUsUndeliveredWeightedAverageExercisePrice" id="hypd_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsVestedRSUsUndeliveredWeightedAverageExercisePrice" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ProceedsFromSaleOfCommonStockAndWarrantsInRegisteredDirectOffering" id="hypd_ProceedsFromSaleOfCommonStockAndWarrantsInRegisteredDirectOffering" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="IncreaseDecreaseInDeferredClinicalSupplyCosts" id="hypd_IncreaseDecreaseInDeferredClinicalSupplyCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="AtMarketOfferingProgramMember" id="hypd_AtMarketOfferingProgramMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AccountingPoliciesDisclosureTable" id="hypd_AccountingPoliciesDisclosureTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AccountingPoliciesDisclosureLineItems" id="hypd_AccountingPoliciesDisclosureLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ScheduleOfNotesPayableTable" id="hypd_ScheduleOfNotesPayableTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="NotesPayableLineItems" id="hypd_NotesPayableLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DebtInstrumentFinalPayment" id="hypd_DebtInstrumentFinalPayment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="RelatedPartyTransactionsTable" id="hypd_RelatedPartyTransactionsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="RelatedPartyTransactionsLineItems" id="hypd_RelatedPartyTransactionsLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AvenueNotePayableMember" id="hypd_AvenueNotePayableMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AvenueConvertibleNotePayableMember" id="hypd_AvenueConvertibleNotePayableMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="StockholdersEquityTable" id="hypd_StockholdersEquityTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="StockholdersEquityLineItems" id="hypd_StockholdersEquityLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="NotesPayableUnamortizedDiscountCurrent" id="hypd_NotesPayableUnamortizedDiscountCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ConvertibleNotesPayableUnamortizedDiscountCurrent" id="hypd_ConvertibleNotesPayableUnamortizedDiscountCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="NotesPayableUnamortizedDiscountNoncurrent" id="hypd_NotesPayableUnamortizedDiscountNoncurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="PaymentsOfStockIssuanceCostsAtMarketOffering" id="hypd_PaymentsOfStockIssuanceCostsAtMarketOffering" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="LoanAndSecurityAgreementWithAvenueVentureOpportunitiesFundL.p.AndAvenueVentureOpportunitiesFundL.p.IiMember" id="hypd_LoanAndSecurityAgreementWithAvenueVentureOpportunitiesFundL.p.AndAvenueVentureOpportunitiesFundL.p.IiMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AvenueVentureOpportunitiesFundL.p.AndAvenueVentureOpportunitiesFundL.p.IiMember" id="hypd_AvenueVentureOpportunitiesFundL.p.AndAvenueVentureOpportunitiesFundL.p.IiMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AvenueVentureOpportunitiesFundL.p.IiMember" id="hypd_AvenueVentureOpportunitiesFundL.p.IiMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="InitialTrancheOfAvenueLoanMember" id="hypd_InitialTrancheOfAvenueLoanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DebtInstrumentIncrementalFinalPaymentInterestRate" id="hypd_DebtInstrumentIncrementalFinalPaymentInterestRate" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="DebtInstrumentMonthlyInterestOnlyPaymentTerm" id="hypd_DebtInstrumentMonthlyInterestOnlyPaymentTerm" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="DeferredTaxAssetsCapitalizedResearchAndDevelopmentCosts" id="hypd_DeferredTaxAssetsCapitalizedResearchAndDevelopmentCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="LicenseAgreementsUpfrontPaymentsReceived" id="hypd_LicenseAgreementsUpfrontPaymentsReceived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="LicenseAgreementRegulatoryApprovals" id="hypd_LicenseAgreementRegulatoryApprovals" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="RoyaltyRevenuePayments" id="hypd_RoyaltyRevenuePayments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="LicenseAgreementsMaximumAdditionalPaymentsReceivable" id="hypd_LicenseAgreementsMaximumAdditionalPaymentsReceivable" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="WrittenNoticePeriodForTerminationOfAgreement" id="hypd_WrittenNoticePeriodForTerminationOfAgreement" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="StockIssuedDuringPeriodSharesWarrantsExercised" id="hypd_StockIssuedDuringPeriodSharesWarrantsExercised" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="StockIssuedDuringPeriodValueWarrantsExercised" id="hypd_StockIssuedDuringPeriodValueWarrantsExercised" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="LicenseAgreementFilingOfMarketingAuthorizationApplications" id="hypd_LicenseAgreementFilingOfMarketingAuthorizationApplications" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="DebtInstrumentExtensionOfInterestPeriod" id="hypd_DebtInstrumentExtensionOfInterestPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="FormosaPharmaceuticalsIncMember" id="hypd_FormosaPharmaceuticalsIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="UpfrontPayment" id="hypd_UpfrontPayment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="UpfrontPaymentPaidInCash" id="hypd_UpfrontPaymentPaidInCash" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="AccruedReworkOfClinicalSupplyReturnsCurrent" id="hypd_AccruedReworkOfClinicalSupplyReturnsCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="StockIssuedDuringPeriodValueLicensingAgreements" id="hypd_StockIssuedDuringPeriodValueLicensingAgreements" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="StockIssuedDuringPeriodSharesLicensingAgreements" id="hypd_StockIssuedDuringPeriodSharesLicensingAgreements" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="LegalExpensesCapitalized" id="hypd_LegalExpensesCapitalized" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="MaximumAmountPayableUponAchievementOfCertainSalesMilestones" id="hypd_MaximumAmountPayableUponAchievementOfCertainSalesMilestones" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="EquityOfferingAugust2023Member" id="hypd_EquityOfferingAugust2023Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ClassOfWarrantOrRightOldRepriced" id="hypd_ClassOfWarrantOrRightOldRepriced" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ClassOfWarrantOrRightNewRepriced" id="hypd_ClassOfWarrantOrRightNewRepriced" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ClassOfWarrantOrRightOldRepricedWeightedAverageExercisePrice" id="hypd_ClassOfWarrantOrRightOldRepricedWeightedAverageExercisePrice" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ClassOfWarrantOrRightNewRepricedWeightedAverageExercisePrice" id="hypd_ClassOfWarrantOrRightNewRepricedWeightedAverageExercisePrice" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="MonthlyRetainer" id="hypd_MonthlyRetainer" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="DirectorsAndOfficersInsurancePolicyLoanMember" id="hypd_DirectorsAndOfficersInsurancePolicyLoanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ExecutiveChairmanMember" id="hypd_ExecutiveChairmanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="NewAccountingPronouncementsIssuedPolicyPolicyTextBlock" id="hypd_NewAccountingPronouncementsIssuedPolicyPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="AdditionalTrancheOfAvenueLoanMember" id="hypd_AdditionalTrancheOfAvenueLoanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="OperatingLeasesRentalExpense" id="hypd_OperatingLeasesRentalExpense" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="PercentageOfProductApprovedByFda" id="hypd_PercentageOfProductApprovedByFda" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="AccrualForIntangibleAssetsMilestoneObligation" id="hypd_AccrualForIntangibleAssetsMilestoneObligation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="InitialDevelopmentMilestonePaymentTriggerForFdaApproval" id="hypd_InitialDevelopmentMilestonePaymentTriggerForFdaApproval" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="RegisteredDirectOffering2024Member" id="hypd_RegisteredDirectOffering2024Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="LossContingencyReceivableUponCompletionOfMilestone" id="hypd_LossContingencyReceivableUponCompletionOfMilestone" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ReacquisitionOfLicenseRights" id="hypd_ReacquisitionOfLicenseRights" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="LossContingencyPurchasedUponCompletionOfMilestone" id="hypd_LossContingencyPurchasedUponCompletionOfMilestone" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ReclassificationOfDeferredClinicalSupplyCostsToInventories" id="hypd_ReclassificationOfDeferredClinicalSupplyCostsToInventories" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="StockIssuedValueReacquisitionOfLicensingAgreement" id="hypd_StockIssuedValueReacquisitionOfLicensingAgreement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="StockIssuedDuringPeriodValueReacquisitionOfLicensingAgreement" id="hypd_StockIssuedDuringPeriodValueReacquisitionOfLicensingAgreement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="StockIssuedDuringPeriodSharesReacquisitionOfLicensingAgreement" id="hypd_StockIssuedDuringPeriodSharesReacquisitionOfLicensingAgreement" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="PriorWarrantsMember" id="hypd_PriorWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights2" id="hypd_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights2" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="MaximumAmountPayableUponAchievementOfCertainDevelopmentMilestones" id="hypd_MaximumAmountPayableUponAchievementOfCertainDevelopmentMilestones" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="ChangeInFairValueOfEquityConsiderationPayable" id="hypd_ChangeInFairValueOfEquityConsiderationPayable" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="NonCashExpensesOnReacquisitionOfLicenseRights" id="hypd_NonCashExpensesOnReacquisitionOfLicenseRights" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ClassOfWarrantOrRightNumberOfAdditionalSecuritiesCalledByAdditionalWarrantsOrRights" id="hypd_ClassOfWarrantOrRightNumberOfAdditionalSecuritiesCalledByAdditionalWarrantsOrRights" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="PlacementAgentFees" id="hypd_PlacementAgentFees" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ClassOfWarrantOrRightPriceOfWarrantsOrRights" id="hypd_ClassOfWarrantOrRightPriceOfWarrantsOrRights" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="JulyOfferingMember" id="hypd_JulyOfferingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="StockIssuedDuringPeriodSharesOfferings" id="hypd_StockIssuedDuringPeriodSharesOfferings" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="ProceedsFromIssuanceOfCommonStockAndWarrants" id="hypd_ProceedsFromIssuanceOfCommonStockAndWarrants" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="StockIssuedDuringPeriodValueLoanModification" id="hypd_StockIssuedDuringPeriodValueLoanModification" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="StockIssuedDuringPeriodSharesLoanModification" id="hypd_StockIssuedDuringPeriodSharesLoanModification" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="StockValueAdjustmentForEquipmentReceivedUnderLicenseAgreement" id="hypd_StockValueAdjustmentForEquipmentReceivedUnderLicenseAgreement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="StockIssuedForLoanModification" id="hypd_StockIssuedForLoanModification" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="ImpairmentOfPropertyPlantAndEquipment" id="hypd_ImpairmentOfPropertyPlantAndEquipment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ImpairmentOfEquipmentDeposits" id="hypd_ImpairmentOfEquipmentDeposits" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="LicenseAgreementUpfrontPaymentPaid" id="hypd_LicenseAgreementUpfrontPaymentPaid" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="ValueOfStockIssuedForReacquisitionOfLicenseRightsOnTransferDate" id="hypd_ValueOfStockIssuedForReacquisitionOfLicenseRightsOnTransferDate" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="ExistingWarrantsMember" id="hypd_ExistingWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ClassOfWarrantsOrRightsNumberOfWarrantsIssued" id="hypd_ClassOfWarrantsOrRightsNumberOfWarrantsIssued" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="GrossProceedsFromWarrantExercises" id="hypd_GrossProceedsFromWarrantExercises" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="UntilCompanyRaisesThresholdProceedsInOfferingMember" id="hypd_UntilCompanyRaisesThresholdProceedsInOfferingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ThresholdAggregateNetProceedsFromIssuanceOfStock" id="hypd_ThresholdAggregateNetProceedsFromIssuanceOfStock" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="PercentageOfProceedsToBeRemittedToLender" id="hypd_PercentageOfProceedsToBeRemittedToLender" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="AfterCompanyRaisesThresholdProceedsInOfferingMember" id="hypd_AfterCompanyRaisesThresholdProceedsInOfferingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AmendedAndRestatedSalesAgreementMember" id="hypd_AmendedAndRestatedSalesAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="RepaymentsOfNotesPayableAsPercentageOfNetProceedsFromOffering" id="hypd_RepaymentsOfNotesPayableAsPercentageOfNetProceedsFromOffering" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="PrepaidRegulatoryExpensesWriteOff" id="hypd_PrepaidRegulatoryExpensesWriteOff" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="MedicalExpertiseAndConsultationServicePeriod" id="hypd_MedicalExpertiseAndConsultationServicePeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="OphthalmicTechnologySegmentMember" id="hypd_OphthalmicTechnologySegmentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ResearchAndDevelopmentExpenseSalariesAndBenefits" id="hypd_ResearchAndDevelopmentExpenseSalariesAndBenefits" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ResearchAndDevelopmentExpenseDirectClinicalAndNonClinicalExpenses" id="hypd_ResearchAndDevelopmentExpenseDirectClinicalAndNonClinicalExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ResearchAndDevelopmentExpenseSuppliesAndMaterials" id="hypd_ResearchAndDevelopmentExpenseSuppliesAndMaterials" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ResearchAndDevelopmentExpenseDepreciationExpense" id="hypd_ResearchAndDevelopmentExpenseDepreciationExpense" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ResearchAndDevelopmentExpenseFacilitiesExpenses" id="hypd_ResearchAndDevelopmentExpenseFacilitiesExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ResearchAndDevelopmentExpenseNonCashStockBasedCompensationExpense" id="hypd_ResearchAndDevelopmentExpenseNonCashStockBasedCompensationExpense" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="NumberOfVotesPerCommonShare" id="hypd_NumberOfVotesPerCommonShare" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="September2024OfferingMember" id="hypd_September2024OfferingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="November2024OfferingMember" id="hypd_November2024OfferingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="December2024OfferingMember" id="hypd_December2024OfferingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="VolumeWeightedAveragePriceThresholdTradingDays" id="hypd_VolumeWeightedAveragePriceThresholdTradingDays" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="WarrantsAtExercisePriceSevenMember" id="hypd_WarrantsAtExercisePriceSevenMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DeferredTaxAssetsLeaseLiabilities" id="hypd_DeferredTaxAssetsLeaseLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="UsTreasuryBillSecurities" id="hypd_UsTreasuryBillSecurities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="PaymentsForWarrantsIssuanceCosts" id="hypd_PaymentsForWarrantsIssuanceCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="ReverseStockSplitSettlementOfFractionalShares" id="hypd_ReverseStockSplitSettlementOfFractionalShares" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="WarrantsModificationIncrementalCosts" id="hypd_WarrantsModificationIncrementalCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ReductionInExercisePriceOfWarrantsIfInvestorImmediatelyExercisedWarrantsMember" id="hypd_ReductionInExercisePriceOfWarrantsIfInvestorImmediatelyExercisedWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ModificationOfDebtFairValueAtModificationDate" id="hypd_ModificationOfDebtFairValueAtModificationDate" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="WarrantsAssumptionsUsedForValuationBeforeModificationMember" id="hypd_WarrantsAssumptionsUsedForValuationBeforeModificationMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="WarrantsAssumptionsUsedForValuationAfterModificationMember" id="hypd_WarrantsAssumptionsUsedForValuationAfterModificationMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="NetProceedsFromWarrantExercises" id="hypd_NetProceedsFromWarrantExercises" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="CryptoAssetNumberOfUnitsPurchased" id="hypd_CryptoAssetNumberOfUnitsPurchased" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="AccruedFormerLicenseObligationCurrent" id="hypd_AccruedFormerLicenseObligationCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="StockIssuedDuringPeriodValueInducedExerciseOfWarrants" id="hypd_StockIssuedDuringPeriodValueInducedExerciseOfWarrants" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="StockIssuedDuringPeriodSharesInducedExerciseOfWarrants" id="hypd_StockIssuedDuringPeriodSharesInducedExerciseOfWarrants" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="StockIssuedDuringPeriodValueNewIssuesPrivatePlacement" id="hypd_StockIssuedDuringPeriodValueNewIssuesPrivatePlacement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="StockIssuedDuringPeriodSharesNewIssuesPrivatePlacement" id="hypd_StockIssuedDuringPeriodSharesNewIssuesPrivatePlacement" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="PaymentsForStockIssuanceCostsWarrantsExercises" id="hypd_PaymentsForStockIssuanceCostsWarrantsExercises" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="DebtRestructuringPrincipalAmountRepaid" id="hypd_DebtRestructuringPrincipalAmountRepaid" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="DebtRestructuringInterestAmountRepaid" id="hypd_DebtRestructuringInterestAmountRepaid" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="DebtRestructuringNegotiatedAdjustment" id="hypd_DebtRestructuringNegotiatedAdjustment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="DebtConversionDiscountOnConversion" id="hypd_DebtConversionDiscountOnConversion" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="DebtConversionThresholdPercentageOnBeneficialOwnership" id="hypd_DebtConversionThresholdPercentageOnBeneficialOwnership" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="DebtConversionNoticePeriodForEffectiveBeneficialOwnership" id="hypd_DebtConversionNoticePeriodForEffectiveBeneficialOwnership" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="DebtConversionEliminationOfConversionOptionOriginalDebtAmount" id="hypd_DebtConversionEliminationOfConversionOptionOriginalDebtAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="DebtInstrumentCancellationOfFinalPayment" id="hypd_DebtInstrumentCancellationOfFinalPayment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="LenderWarrantsMember" id="hypd_LenderWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ProceedsFromIssuanceOfPreferredStockAndWarrantsPrivatePlacement" id="hypd_ProceedsFromIssuanceOfPreferredStockAndWarrantsPrivatePlacement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="PaymentsOfStockIssuanceCostsPrivatePlacement" id="hypd_PaymentsOfStockIssuanceCostsPrivatePlacement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="ProceedsFromInducedExerciseOfWarrants" id="hypd_ProceedsFromInducedExerciseOfWarrants" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="PaymentsOfCostsOnInducedExerciseOfWarrants" id="hypd_PaymentsOfCostsOnInducedExerciseOfWarrants" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="WarrantsIssuedForDebtModification" id="hypd_WarrantsIssuedForDebtModification" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="PlacementAgentWarrantsMember" id="hypd_PlacementAgentWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ClassOfWarrantOrRightIssued" id="hypd_ClassOfWarrantOrRightIssued" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ClassOfWarrantOrRightExpired" id="hypd_ClassOfWarrantOrRightExpired" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ClassOfWarrantOrRightIssuedWeightedAverageExercisePrice" id="hypd_ClassOfWarrantOrRightIssuedWeightedAverageExercisePrice" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ClassOfWarrantOrRightExpiredWeightedAverageExercisePrice" id="hypd_ClassOfWarrantOrRightExpiredWeightedAverageExercisePrice" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ClassOfWarrantOrRightOutstandingAggregateIntrinsicValue" id="hypd_ClassOfWarrantOrRightOutstandingAggregateIntrinsicValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ClassOfWarrantOrRightExercisableAggregateIntrinsicValue" id="hypd_ClassOfWarrantOrRightExercisableAggregateIntrinsicValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="LiquidityPlanAbstract" id="hypd_LiquidityPlanAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="LiquidityPlanDisclosureTextBlock" id="hypd_LiquidityPlanDisclosureTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="WorkingCapitalDeficit" id="hypd_WorkingCapitalDeficit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="DigitalAssetsMember" id="hypd_DigitalAssetsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="NonCashLeaseExpense" id="hypd_NonCashLeaseExpense" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="DigitalAssetsPolicyPolicyTextBlock" id="hypd_DigitalAssetsPolicyPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="GainLossOnExtinguishmentOfLiability" id="hypd_GainLossOnExtinguishmentOfLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="CryptoAssetStakingIncome" id="hypd_CryptoAssetStakingIncome" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="PaymentsToAcquireProductiveIntangibleAssets" id="hypd_PaymentsToAcquireProductiveIntangibleAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="DigitalAssetsDisclosureTextBlock" id="hypd_DigitalAssetsDisclosureTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="CryptoAssetReceiptAndAccrualFromNativeStakingActivities" id="hypd_CryptoAssetReceiptAndAccrualFromNativeStakingActivities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="OtherDigitalAssetsMember" id="hypd_OtherDigitalAssetsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="IndefiniteLivedIntangibleAssetsNumberOfUnits" id="hypd_IndefiniteLivedIntangibleAssetsNumberOfUnits" type="xbrli:decimalItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="IndefiniteLivedIntangibleAssetsExcludingGoodwillGross" id="hypd_IndefiniteLivedIntangibleAssetsExcludingGoodwillGross" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="KinetiqResearchPteAndPierTwoPtyLtdMember" id="hypd_KinetiqResearchPteAndPierTwoPtyLtdMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AggregateOfferingPrice" id="hypd_AggregateOfferingPrice" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="DepositsOfCryptoAssetIntoLiquidStakingActivities" id="hypd_DepositsOfCryptoAssetIntoLiquidStakingActivities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="NoncashRealizedGainLossOnCryptoAsset" id="hypd_NoncashRealizedGainLossOnCryptoAsset" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="HypeDigitalAssetsMember" id="hypd_HypeDigitalAssetsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DigitalIntangibleAssetsMember" id="hypd_DigitalIntangibleAssetsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="CryptoAssetImpairment" id="hypd_CryptoAssetImpairment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="CryptoAssetsFairValue" id="hypd_CryptoAssetsFairValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="MarketRevenuesPercentage" id="hypd_MarketRevenuesPercentage" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="CryptoAssetHypeAssetUseServiceAgreementInitialTerm" id="hypd_CryptoAssetHypeAssetUseServiceAgreementInitialTerm" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="CryptoAssetHypeAssetUseServiceAgreementAutomaticRenewable" id="hypd_CryptoAssetHypeAssetUseServiceAgreementAutomaticRenewable" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="CryptoAssetHypeAssetUseServiceAgreementTerminatedNotice" id="hypd_CryptoAssetHypeAssetUseServiceAgreementTerminatedNotice" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="HypeAssetUseServiceAgreementMember" id="hypd_HypeAssetUseServiceAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ScheduleOfShareBasedPaymentAwardOptionsOtherThanEquityInstrumentsValuationAssumptionsTableTextBlock" id="hypd_ScheduleOfShareBasedPaymentAwardOptionsOtherThanEquityInstrumentsValuationAssumptionsTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="NumberOfExecutiveOfficersEnteredIntoEmploymentAgreements" id="hypd_NumberOfExecutiveOfficersEnteredIntoEmploymentAgreements" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="NumberOfTranchesInWhichMarketBasedGrantsVest" id="hypd_NumberOfTranchesInWhichMarketBasedGrantsVest" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="HyperionAndFelixMember" id="hypd_HyperionAndFelixMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="CryptoAssetDispositions" id="hypd_CryptoAssetDispositions" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="AccruedResearchAndDevelopmentExpensesCurrent" id="hypd_AccruedResearchAndDevelopmentExpensesCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="PlacementAgentCommissionFeePercentage" id="hypd_PlacementAgentCommissionFeePercentage" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="Rule10b51ArrangementModifiedFlag" id="hypd_Rule10b51ArrangementModifiedFlag" type="xbrli:booleanItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="NonRule10b51ArrangementModifiedFlag" id="hypd_NonRule10b51ArrangementModifiedFlag" type="xbrli:booleanItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="CryptoAssetsReceivableAfterUnamortizedNonrefundableUpfrontFeeAndAllowanceForCreditLossNonCurrent" id="hypd_CryptoAssetsReceivableAfterUnamortizedNonrefundableUpfrontFeeAndAllowanceForCreditLossNonCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="GainLossOnCoveredCallOption" id="hypd_GainLossOnCoveredCallOption" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="CryptoAssetsReceivableProvisionForCreditLoss" id="hypd_CryptoAssetsReceivableProvisionForCreditLoss" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="NonCashCommissionPaidToCoValidators" id="hypd_NonCashCommissionPaidToCoValidators" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="CryptoAssetsReceivableUnamortizedNonrefundableUpfrontFee" id="hypd_CryptoAssetsReceivableUnamortizedNonrefundableUpfrontFee" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="RedemptionOfLiquidStakingTokensForCryptoAssets" id="hypd_RedemptionOfLiquidStakingTokensForCryptoAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="TransferOfCryptoAssetsToDigitalAssetReceivable" id="hypd_TransferOfCryptoAssetsToDigitalAssetReceivable" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="AccruedDividendPayable" id="hypd_AccruedDividendPayable" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="TreasuryStockHeldForEmployeePayrollTaxes" id="hypd_TreasuryStockHeldForEmployeePayrollTaxes" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="IntangibleAssetsLicenseObligationsPayable" id="hypd_IntangibleAssetsLicenseObligationsPayable" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="CryptoAssetNumberOfUnitsStaked" id="hypd_CryptoAssetNumberOfUnitsStaked" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="DigitalAssetsReceivableMember" id="hypd_DigitalAssetsReceivableMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="CryptoAssetsReceivableRealizedCreditLosses" id="hypd_CryptoAssetsReceivableRealizedCreditLosses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="CryptoAssetPurchasedFromLiquidStaking" id="hypd_CryptoAssetPurchasedFromLiquidStaking" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="CryptoAssetCommissionExpense" id="hypd_CryptoAssetCommissionExpense" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="CryptoAssetReceivablePurchases" id="hypd_CryptoAssetReceivablePurchases" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="HihypeLiquidStakingTokenMember" id="hypd_HihypeLiquidStakingTokenMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="KhypeLiquidStakingTokenMember" id="hypd_KhypeLiquidStakingTokenMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="KmhypeLiquidStakingTokenMember" id="hypd_KmhypeLiquidStakingTokenMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AccruedFranchiseTax" id="hypd_AccruedFranchiseTax" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="MerentiManagementGmbhMember" id="hypd_MerentiManagementGmbhMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="IncomeTaxReconciliationTaxExemptIncomeOrNondeductibleExpenseAmount" id="hypd_IncomeTaxReconciliationTaxExemptIncomeOrNondeductibleExpenseAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="EffectiveIncomeTaxReconciliationTaxExemptIncomeOrNondeductibleExpensePercent" id="hypd_EffectiveIncomeTaxReconciliationTaxExemptIncomeOrNondeductibleExpensePercent" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="NewYorkCityMember" id="hypd_NewYorkCityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="WarrantsAtExercisePriceNineMember" id="hypd_WarrantsAtExercisePriceNineMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="WarrantsAtExercisePriceTenMember" id="hypd_WarrantsAtExercisePriceTenMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="CredoCaymanMember" id="hypd_CredoCaymanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="CryptoAssetNumberOfUnitsAllocatedToMultiSignatureWallet" id="hypd_CryptoAssetNumberOfUnitsAllocatedToMultiSignatureWallet" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="CryptoAssetTemporaryUseAgreementInitialTerm" id="hypd_CryptoAssetTemporaryUseAgreementInitialTerm" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="CryptoAssetTemporaryUseAgreementAutomaticRenewable" id="hypd_CryptoAssetTemporaryUseAgreementAutomaticRenewable" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="CryptoAssetTemporaryUseAgreementThresholdNoticePeriodForNonRenewal" id="hypd_CryptoAssetTemporaryUseAgreementThresholdNoticePeriodForNonRenewal" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="NativeMarketsIncMember" id="hypd_NativeMarketsIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="CryptoAssetNumberOfUnitsInitiatedForStake" id="hypd_CryptoAssetNumberOfUnitsInitiatedForStake" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="CryptoAssetJointValidatorAgreementInitialTerm" id="hypd_CryptoAssetJointValidatorAgreementInitialTerm" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="CryptoAssetJointValidatorAgreementThresholdPriorNoticePeriod" id="hypd_CryptoAssetJointValidatorAgreementThresholdPriorNoticePeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="March2022SecuritiesPurchaseAgreementMember" id="hypd_March2022SecuritiesPurchaseAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="January2025InducementOfferingMember" id="hypd_January2025InducementOfferingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="RepaymentOfNotesPayableInterestPayment" id="hypd_RepaymentOfNotesPayableInterestPayment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="WarrantModificationAndAdditionalWarrantsIncrementalValue" id="hypd_WarrantModificationAndAdditionalWarrantsIncrementalValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="EffectiveIncomeTaxRateReconciliationUnusableTaxCreditsAmount" id="hypd_EffectiveIncomeTaxRateReconciliationUnusableTaxCreditsAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="CorporateAndReconcilingItemsMember" id="hypd_CorporateAndReconcilingItemsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="OtherAssetImpairmentLoss" id="hypd_OtherAssetImpairmentLoss" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="EffectiveIncomeTaxRateReconciliationUnusableTaxCreditsPercent" id="hypd_EffectiveIncomeTaxRateReconciliationUnusableTaxCreditsPercent" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="OperatingIncomeLossExcludingReconcilingItems" id="hypd_OperatingIncomeLossExcludingReconcilingItems" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="DeferredTaxAssetsOtherImpairedAssets" id="hypd_DeferredTaxAssetsOtherImpairedAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="CryptoAssetNumberOfUnitsRewardReceived" id="hypd_CryptoAssetNumberOfUnitsRewardReceived" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="ClassOfWarrantsOrRightOutstanding" id="hypd_ClassOfWarrantsOrRightOutstanding" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="ClassOfWarrantsOrRightExercisable" id="hypd_ClassOfWarrantsOrRightExercisable" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="CryptoAssetsUnrealizedGainLossOperating" id="hypd_CryptoAssetsUnrealizedGainLossOperating" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="NonCashRealizedGainOnCryptoAsset" id="hypd_NonCashRealizedGainOnCryptoAsset" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="EffectiveIncomeTaxRateReconciliationOtherAdjustmentsRelatedToPriorPeriodDeferredAmount" id="hypd_EffectiveIncomeTaxRateReconciliationOtherAdjustmentsRelatedToPriorPeriodDeferredAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="EffectiveIncomeTaxRateReconciliationOtherAdjustmentsRelatedToPriorPeriodDeferredPercent" id="hypd_EffectiveIncomeTaxRateReconciliationOtherAdjustmentsRelatedToPriorPeriodDeferredPercent" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ValuationAllowancesDeferredTaxAssetIncreaseDecreaseAmount" id="hypd_ValuationAllowancesDeferredTaxAssetIncreaseDecreaseAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
</xsd:schema>
