Some useful implementation examples

Table of Contents 
 
 Core Implementation 
 Asset Journey Examples 
 Phase Transition Scenarios 
 Threshold Calculations 
 Governance Flows 
 Implementation Considerations 
 
 1. Core Implementation 
 Base Structure 
 data RealWorldAsset = RealWorldAsset {
 assetId :: AssetId,
 assetType :: AssetType,
 assetValue :: Integer, 
 assetMetadata :: AssetMetadata, 
 custodialInfo :: CustodianInfo,
 verificationData :: VerificationInfo,
 requirementSet :: [Requirement]
}

-- Extensible asset types to accommodate any real-world asset
data AssetType = 
 ArtPiece ArtDetails
 | RealEstate PropertyDetails
 | PreciousMetals MetalDetails
 | Commodity CommodityDetails
 | CustomAsset CustomDetails

-- Requirement system that handles any type of requirement
data Requirement = Requirement {
 requirementType :: RequirementType,
 description :: Text,
 validationMethod :: ValidationMethod,
 verificationFrequency :: Frequency,
 requirementStatus :: RequirementStatus,
 lastVerified :: Maybe POSIXTime
}

data RequirementType =
 Legal
 | Physical
 | Operational
 | Environmental
 | Financial
 | Custom Text
 
 Agora Governance Integration 
 data AgoraPhase = 
 LockPhase LockPhaseInfo
 | VotingPhase VotingPhaseInfo
 | ExecutionPhase ExecutionPhaseInfo

data GovernanceConfig = GovernanceConfig {
 thresholds :: AgoraThresholds,
 phaseDurations :: PhaseDurations,
 votingPowerStrategy :: VotingStrategy,
 effectValidators :: Map EffectType EffectValidator
}

data AgoraThresholds = AgoraThresholds {
 creation :: Percentage, -- e.g., 5%
 start :: Percentage, -- e.g., 10%
 vote :: Percentage, -- e.g., 15%
 execution :: Percentage, -- e.g., 51%
 cosigning :: Percentage -- e.g., 25%
}

data PhaseDurations = PhaseDurations {
 lockPhaseDuration :: POSIXTime,
 votingPhaseDuration :: POSIXTime,
 executionPhaseDuration :: POSIXTime
}
 
 2. Asset Journey Examples 
 Example 1: Fine Art Tokenization 
 -- Picasso painting tokenization example
artExample :: RealWorldAsset
artExample = RealWorldAsset {
 assetId = "art_001",
 assetType = ArtPiece {
 artist = "Pablo Picasso",
 title = "Example Painting",
 year = 1937,
 medium = "Oil on canvas",
 dimensions = Dimensions 349.3 776.6,
 authenticity = [Certificate1, Certificate2]
 },
 assetValue = 10_000_000_000_000, -- 10M ADA
 requirementSet = [
 Requirement {
 requirementType = Physical,
 description = "Temperature control 20-22°C",
 validationMethod = TemperatureSensorValidation,
 verificationFrequency = Hourly,
 requirementStatus = Active
 },
 Requirement {
 requirementType = Legal,
 description = "Insurance coverage",
 validationMethod = InsuranceDocValidation,
 verificationFrequency = Monthly,
 requirementStatus = Active
 }
 ]
}

-- Art-specific proposal example
proposeMoveToNewGallery :: ProposalParams
proposeMoveToNewGallery = ProposalParams {
 description = "Move artwork to Modern Gallery",
 effect = PhysicalLocationChange {
 newLocation = "Modern Gallery, NY",
 transportMethod = "Specialized Art Transport",
 insuranceCoverage = "Extended Transit Insurance"
 },
 requiredCosigners = [
 galleryCurator,
 insuranceProvider,
 securityProvider
 ]
}
 
 Example 2: Commodity Batch Management 
 -- Coffee batch tokenization example
commodityExample :: RealWorldAsset
commodityExample = RealWorldAsset {
 assetId = "coffee_batch_001",
 assetType = Commodity {
 type = "Arabica Coffee",
 grade = "Premium",
 origin = "Colombia",
 harvest = "2024",
 quantity = MetricTons 100
 },
 assetValue = 1_000_000_000_000, -- 1M ADA
 requirementSet = [
 Requirement {
 requirementType = Environmental,
 description = "Storage humidity 60-65%",
 validationMethod = HumiditySensorValidation,
 verificationFrequency = Daily,
 requirementStatus = Active
 }
 ]
}

-- Storage condition change proposal
proposeStorageChange :: ProposalParams
proposeStorageChange = ProposalParams {
 description = "Update storage conditions",
 effect = StorageConditionChange {
 newHumidity = Percentage 62,
 newTemperature = Celsius 20,
 implementation = "Automated climate control"
 },
 requiredCosigners = [
 warehouseManager,
 qualityInspector
 ]
}
 
 3. Phase Transition Scenarios 
 Lock Phase Implementation 
 data LockPhaseInfo = LockPhaseInfo {
 startTime :: POSIXTime,
 endTime :: POSIXTime,
 requiredStake :: Integer,
 currentStake :: Integer,
 lockedTokens :: Map PubKeyHash Integer
}

startLockPhase :: ProposalId -> Contract w s Text ()
startLockPhase proposalId = do
 proposal <- getProposal proposalId
 currentTime <- getCurrentTime
 
 let lockInfo = LockPhaseInfo {
 startTime = currentTime,
 endTime = currentTime + proposal.lockDuration,
 requiredStake = calculateRequiredStake proposal,
 currentStake = 0,
 lockedTokens = Map.empty
 }
 
 validateLockPhaseStart proposal
 updateProposalPhase proposalId (LockPhase lockInfo)
 emitLockPhaseStarted proposalId

validateLockPhaseStart :: Proposal -> Bool
validateLockPhaseStart proposal =
 hasMinimumCreationStake &&
 notInActivePhase &&
 allRequirementsValid
 
 Voting Phase Implementation 
 data VotingPhaseInfo = VotingPhaseInfo {
 votes :: Map PubKeyHash Vote,
 totalVotingPower :: Integer,
 usedVotingPower :: Integer,
 voteDistribution :: VoteDistribution
}

data Vote = Vote {
 direction :: VoteDirection,
 power :: Integer,
 timestamp :: POSIXTime,
 metadata :: VoteMetadata
}

startVotingPhase :: ProposalId -> Contract w s Text ()
startVotingPhase proposalId = do
 proposal <- getProposal proposalId
 
 -- Verify lock phase completion
 unless (isLockPhaseComplete proposal) $
 throwError "Lock phase incomplete"
 
 -- Verify start threshold
 unless (meetsStartThreshold proposal) $
 throwError "Insufficient stake for voting start"
 
 let votingInfo = VotingPhaseInfo {
 votes = Map.empty,
 totalVotingPower = calculateTotalPower proposal,
 usedVotingPower = 0,
 voteDistribution = initializeVoteDistribution
 }
 
 updateProposalPhase proposalId (VotingPhase votingInfo)
 emitVotingPhaseStarted proposalId
 
 4. Threshold Calculations 
 Practical Examples 
 -- Example: Art piece worth 10M ADA
calculateThresholds :: AssetValue -> AgoraThresholds
calculateThresholds assetValue = AgoraThresholds {
 creation = Percentage 5, -- 500k ADA to create proposal
 start = Percentage 10, -- 1M ADA to start voting
 vote = Percentage 15, -- 1.5M ADA for valid vote
 execution = Percentage 51, -- 5.1M ADA to execute
 cosigning = Percentage 25 -- 2.5M ADA for cosigning
}

-- Example: Calculating voting power
calculateVotingPower :: TokenAmount -> VotingStrategy -> Integer
calculateVotingPower amount strategy = case strategy of
 Linear ->
 amount
 Quadratic ->
 floor $ sqrt $ fromIntegral amount
 WeightedByTime holdingTime ->
 amount * (1 + (holdingTime `div` 30)) -- Bonus for longer holds
 
 5. Governance Flows 
 Complete Proposal Lifecycle 
 data ProposalLifecycle = ProposalLifecycle {
 proposal :: Proposal,
 currentPhase :: AgoraPhase,
 history :: [PhaseTransition],
 votes :: Map PubKeyHash Vote,
 effects :: [Effect],
 status :: ProposalStatus
}

executeProposalLifecycle :: ProposalId -> Contract w s Text ()
executeProposalLifecycle proposalId = do
 -- Initialize proposal
 proposal <- createProposal proposalId
 
 -- Lock phase
 startLockPhase proposalId
 awaitLockPhaseCompletion proposalId
 
 -- Voting phase
 startVotingPhase proposalId
 collectVotes proposalId
 
 -- Execution phase
 validateVotingResults proposalId
 collectCosignatures proposalId
 executeEffects proposalId
 
 6. Implementation Considerations 
 Security Measures 
 data SecurityMeasures = SecurityMeasures {
 accessControl :: AccessControl,
 thresholdValidation :: ThresholdValidation,
 timelock :: TimelockConfig,
 emergencyProcedures :: EmergencyProcedures
}

validateSecurityMeasures :: SecurityMeasures -> ScriptContext -> Bool
validateSecurityMeasures measures ctx =
 validateAccess measures.accessControl ctx &&
 validateThresholds measures.thresholdValidation ctx &&
 validateTimelock measures.timelock ctx
 
 Error Handling 
 data GovernanceError =
 InsufficientStake Text
 | InvalidPhaseTransition Text
 | ThresholdNotMet Text
 | ValidationFailed Text
 | TimelockNotExpired Text

handleGovernanceError :: GovernanceError -> Contract w s Text a
handleGovernanceError = \case
 InsufficientStake msg ->
 logError $ "Stake requirement not met: " <> msg
 InvalidPhaseTransition msg ->
 logError $ "Invalid phase transition: " <> msg
 ThresholdNotMet msg ->
 logError $ "Threshold not met: " <> msg
 ValidationFailed msg ->
 logError $ "Validation failed: " <> msg
 TimelockNotExpired msg ->
 logError $ "Timelock not expired: " <> msg
 
 This implementation guide demonstrates how the Agora governance protocol can be used effectively with various real-world assets, providing both technical implementation details and practical examples that engineers can follow.