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  <xs:element name="NonRule10b51ArrangementAdoptedFlag" type="xbrli:booleanItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_NonRule10b51ArrangementAdoptedFlag"/>
  <xs:element name="ScheduleOfPotentiallyAntiDilutiveSharesAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_ScheduleOfPotentiallyAntiDilutiveSharesAbstract"/>
  <xs:element name="ScheduleOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_ScheduleOfAssetsAndLiabilitiesMeasuredAtFairValueOnARecurringBasisAbstract"/>
  <xs:element name="ScheduleOfFixedAssetsAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_ScheduleOfFixedAssetsAbstract"/>
  <xs:element name="ScheduleOfWarrantActivityAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_ScheduleOfWarrantActivityAbstract"/>
  <xs:element name="ScheduleOfAssumptionsUsedAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_ScheduleOfAssumptionsUsedAbstract"/>
  <xs:element name="ScheduleOfReconciliationOfChangesInTheCompanySLevel3WarrantLiabilityAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_ScheduleOfReconciliationOfChangesInTheCompanySLevel3WarrantLiabilityAbstract"/>
  <xs:element name="ScheduleOfDigitalAssetBalanceAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_ScheduleOfDigitalAssetBalanceAbstract"/>
  <xs:element name="ScheduleOfDigitalAssetsAtFairValueAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_ScheduleOfDigitalAssetsAtFairValueAbstract"/>
  <xs:element name="ScheduleOfSegmentInformationAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_ScheduleOfSegmentInformationAbstract"/>
  <xs:element name="ReconciliationOfNetLossAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_ReconciliationOfNetLossAbstract"/>
  <xs:element name="ReceivableRelatedToEmployeeEquityAwards" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="ndra_ReceivableRelatedToEmployeeEquityAwards"/>
  <xs:element name="DigitalAssetStakingCompensation" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="ndra_DigitalAssetStakingCompensation"/>
  <xs:element name="StockIssuedDuringPeriodValueFairValueOfVestedRestrictedStockUnits" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="ndra_StockIssuedDuringPeriodValueFairValueOfVestedRestrictedStockUnits"/>
  <xs:element name="StockIssuedDuringPeriodSharesFairValueOfVestedRestrictedStockUnitsinShares" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_StockIssuedDuringPeriodSharesFairValueOfVestedRestrictedStockUnitsinShares"/>
  <xs:element name="ReceivableRelatedEmployeeEquityAwards" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="ndra_ReceivableRelatedEmployeeEquityAwards"/>
  <xs:element name="ProceedsFromIssuanceOfCommonStockForCashPrivateFundraising" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="ndra_ProceedsFromIssuanceOfCommonStockForCashPrivateFundraising"/>
  <xs:element name="CommonStockOptionsAndRestrictedDisclosureTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_CommonStockOptionsAndRestrictedDisclosureTextBlock"/>
  <xs:element name="CommonStockWarrantsDisclosureTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_CommonStockWarrantsDisclosureTextBlock"/>
  <xs:element name="DigitalAssetsPolicyPolicyTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_DigitalAssetsPolicyPolicyTextBlock"/>
  <xs:element name="MeasurementOfDigitalAssetsPolicyPolicyTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_MeasurementOfDigitalAssetsPolicyPolicyTextBlock"/>
  <xs:element name="DigitalAssetStakingPolicyPolicyTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_DigitalAssetStakingPolicyPolicyTextBlock"/>
  <xs:element name="CustodyAndSafeguardingPolicyPolicyTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_CustodyAndSafeguardingPolicyPolicyTextBlock"/>
  <xs:element name="PresentationPolicyPolicyTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_PresentationPolicyPolicyTextBlock"/>
  <xs:element name="ReceivableRelatedToEmployeeEquityAwardsPolicyTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_ReceivableRelatedToEmployeeEquityAwardsPolicyTextBlock"/>
  <xs:element name="GoingConcernPolicyTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_GoingConcernPolicyTextBlock"/>
  <xs:element name="ScheduleOfDigitalAssetBalanceTableTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_ScheduleOfDigitalAssetBalanceTableTextBlock"/>
  <xs:element name="SummaryofSignificantAccountingPoliciesScheduleofAssetsandLiabilitiesMeasuredatFairValueonaRecurringBasisDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="ndra_SummaryofSignificantAccountingPoliciesScheduleofAssetsandLiabilitiesMeasuredatFairValueonaRecurringBasisDetailsTable"/>
  <xs:element name="SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm1" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm1"/>
  <xs:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageExercisePrice" type="dtr:perShareItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="ndra_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageExercisePrice"/>
  <xs:element name="ShareBasedCompensationArrangementsByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantedInPeriodWeightedAverageExercisePrice" type="dtr:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_ShareBasedCompensationArrangementsByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantedInPeriodWeightedAverageExercisePrice"/>
  <xs:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingGrantedWeightedAverageRemainingContractualTerms" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingGrantedWeightedAverageRemainingContractualTerms"/>
  <xs:element name="ShareBasedCompensationArrangementsByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisedInPeriodWeightedAverageExercisePrice" type="dtr:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_ShareBasedCompensationArrangementsByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisedInPeriodWeightedAverageExercisePrice"/>
  <xs:element name="ShareBasedCompensationArrangementsByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresInPeriodWeightedAverageExercisePrice" type="dtr:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_ShareBasedCompensationArrangementsByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresInPeriodWeightedAverageExercisePrice"/>
  <xs:element name="ShareBasedCompensationArrangementsByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpirationsInPeriodWeightedAverageExercisePrice" type="dtr:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_ShareBasedCompensationArrangementsByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpirationsInPeriodWeightedAverageExercisePrice"/>
  <xs:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsExercisableNumberNumberOfOptionsOutstandingExercisable" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherThanOptionsExercisableNumberNumberOfOptionsOutstandingExercisable"/>
  <xs:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisableWeightedAverageExercisePrice" type="dtr:perShareItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="ndra_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisableWeightedAverageExercisePrice"/>
  <xs:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingExercisableWeightedAverageRemainingContractualTerms" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingExercisableWeightedAverageRemainingContractualTerms"/>
  <xs:element name="CommonStockWarrantsScheduleofAssumptionsUsedDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="ndra_CommonStockWarrantsScheduleofAssumptionsUsedDetailsTable"/>
  <xs:element name="WarrantLiabilitiesOfExercises" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="ndra_WarrantLiabilitiesOfExercises"/>
  <xs:element name="DigitalAssetsScheduleofDigitalAssetBalanceDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="ndra_DigitalAssetsScheduleofDigitalAssetBalanceDetailsTable"/>
  <xs:element name="CostOfTokensSold" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="ndra_CostOfTokensSold"/>
  <xs:element name="DigitalAssetsStakingCompensation" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="ndra_DigitalAssetsStakingCompensation"/>
  <xs:element name="LesseeOperatingLeaseLiabilityPaymentsDueAfterYearOne" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="ndra_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearOne"/>
  <xs:element name="OtherSegmentItems" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="ndra_OtherSegmentItems"/>
  <xs:element name="NetLossConsolidated" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="ndra_NetLossConsolidated"/>
  <xs:element name="NatureoftheBusinessDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="ndra_NatureoftheBusinessDetailsTable"/>
  <xs:element name="ExchangeShares" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_ExchangeShares"/>
  <xs:element name="Votes" type="xbrli:integerItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_Votes"/>
  <xs:element name="SummaryofSignificantAccountingPoliciesDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="ndra_SummaryofSignificantAccountingPoliciesDetailsTable"/>
  <xs:element name="CumulativeNetLossFromInception" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="ndra_CumulativeNetLossFromInception"/>
  <xs:element name="WorkingCapital" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="ndra_WorkingCapital"/>
  <xs:element name="DepositAmount" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="ndra_DepositAmount"/>
  <xs:element name="CapitalStockDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="ndra_CapitalStockDetailsTable"/>
  <xs:element name="PreferredStockSharesUndesignated" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="ndra_PreferredStockSharesUndesignated"/>
  <xs:element name="RestrictedStockSharesAwardedButNotReleased" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_RestrictedStockSharesAwardedButNotReleased"/>
  <xs:element name="AggregateNetProceeds" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="ndra_AggregateNetProceeds"/>
  <xs:element name="CompensationPaid" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="ndra_CompensationPaid"/>
  <xs:element name="CommonStockOptionsRestrictedStockUnitsandRestrictedStockDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="ndra_CommonStockOptionsRestrictedStockUnitsandRestrictedStockDetailsTable"/>
  <xs:element name="CommonStockOptionsRestrictedStockUnitsandRestrictedStockDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_CommonStockOptionsRestrictedStockUnitsandRestrictedStockDetailsLineItems"/>
  <xs:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantDateFairValuePerShare" type="dtr:perShareItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="ndra_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantDateFairValuePerShare"/>
  <xs:element name="FairPricePerShare" type="dtr:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_FairPricePerShare"/>
  <xs:element name="IncrementalCompensation" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="ndra_IncrementalCompensation"/>
  <xs:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsUnrecognizedCompensationExpense" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="ndra_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsUnrecognizedCompensationExpense"/>
  <xs:element name="RestrictedCommonStockFairValue" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="ndra_RestrictedCommonStockFairValue"/>
  <xs:element name="SharebasedCompensationsArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="ndra_SharebasedCompensationsArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1"/>
  <xs:element name="CommonStockWarrantsDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="ndra_CommonStockWarrantsDetailsTable"/>
  <xs:element name="CommonStockWarrantsDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_CommonStockWarrantsDetailsLineItems"/>
  <xs:element name="PurchasePriceOfPrefundedWarrants" type="dtr:perShareItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="ndra_PurchasePriceOfPrefundedWarrants"/>
  <xs:element name="PurchaseShare" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="ndra_PurchaseShare"/>
  <xs:element name="PaymentsForRepurchaseOfCommonStockShares" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_PaymentsForRepurchaseOfCommonStockShares"/>
  <xs:element name="DigitalAssetsDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="ndra_DigitalAssetsDetailsTable"/>
  <xs:element name="ProceedsFromDigitalAssets" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="ndra_ProceedsFromDigitalAssets"/>
  <xs:element name="RelatedPartyTransactionsDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="ndra_RelatedPartyTransactionsDetailsTable"/>
  <xs:element name="CommitmentsandContingenciesDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="ndra_CommitmentsandContingenciesDetailsTable"/>
  <xs:element name="RentSpace" type="dtr:areaItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_RentSpace"/>
  <xs:element name="MonthlyRent" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="ndra_MonthlyRent"/>
  <xs:element name="RentTerm" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_RentTerm"/>
  <xs:element name="AdvisoryWarrantsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_AdvisoryWarrantsMember"/>
  <xs:element name="AlexanderTokmanMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_AlexanderTokmanMember"/>
  <xs:element name="CapitalStockMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_CapitalStockMember"/>
  <xs:element name="CommonStockWarrantsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_CommonStockWarrantsMember"/>
  <xs:element name="DigitalAssetsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_DigitalAssetsMember"/>
  <xs:element name="February2024ATMAgreementMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_February2024ATMAgreementMember"/>
  <xs:element name="HYPETokensMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_HYPETokensMember"/>
  <xs:element name="ImpactSolutionsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_ImpactSolutionsMember"/>
  <xs:element name="IncrementalRestrictedStockUnitsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_IncrementalRestrictedStockUnitsMember"/>
  <xs:element name="January12015Member" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_January12015Member"/>
  <xs:element name="MergerAgreementMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_MergerAgreementMember"/>
  <xs:element name="NobleAfricaIncMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_NobleAfricaIncMember"/>
  <xs:element name="October2025ATMAgreementMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_October2025ATMAgreementMember"/>
  <xs:element name="OmnibusPlanMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_OmnibusPlanMember"/>
  <xs:element name="OptionsToPurchaseCommonStockMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_OptionsToPurchaseCommonStockMember"/>
  <xs:element name="PlacementAgentWarrantsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_PlacementAgentWarrantsMember"/>
  <xs:element name="PreFundedWarrantsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_PreFundedWarrantsMember"/>
  <xs:element name="PrefundedWarrantsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_PrefundedWarrantsMember"/>
  <xs:element name="PrivatePlacementOfferingMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_PrivatePlacementOfferingMember"/>
  <xs:element name="PropertyLeaseholdAndCapitalizedSoftwareMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_PropertyLeaseholdAndCapitalizedSoftwareMember"/>
  <xs:element name="ReceivableRelatedToEmployeeEquityAwardsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_ReceivableRelatedToEmployeeEquityAwardsMember"/>
  <xs:element name="RestrictedStockAwardMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_RestrictedStockAwardMember"/>
  <xs:element name="RichardJacrouxMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_RichardJacrouxMember"/>
  <xs:element name="SecuritiesPurchaseAgreementMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_SecuritiesPurchaseAgreementMember"/>
  <xs:element name="SeriesAWarrantsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_SeriesAWarrantsMember"/>
  <xs:element name="SeriesBWarrantsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_SeriesBWarrantsMember"/>
  <xs:element name="SharesIssuableUponConversionOfSeriesAConvertiblePreferredStockMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_SharesIssuableUponConversionOfSeriesAConvertiblePreferredStockMember"/>
  <xs:element name="SideLetterAgreementMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_SideLetterAgreementMember"/>
  <xs:element name="SubscriptionAgreementMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_SubscriptionAgreementMember"/>
  <xs:element name="TAEUSDevelopmentAndTestingMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_TAEUSDevelopmentAndTestingMember"/>
  <xs:element name="TokenMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_TokenMember"/>
  <xs:element name="TokensMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_TokensMember"/>
  <xs:element name="TwoThousandTwentyFivePrivatePlacementMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_TwoThousandTwentyFivePrivatePlacementMember"/>
  <xs:element name="TwoThousandTwentySixPrivatePlacementMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_TwoThousandTwentySixPrivatePlacementMember"/>
  <xs:element name="WarrantLiabilityMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_WarrantLiabilityMember"/>
  <xs:element name="WarrantsToPurchaseCommonStockMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_WarrantsToPurchaseCommonStockMember"/>
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  <xs:element name="DocumentAndEntityInformationAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="ndra_DocumentAndEntityInformationAbstract"/>
</xs:schema>
