# Some useful implementation examples

## Table of Contents
1. Core Implementation
2. Asset Journey Examples
3. Phase Transition Scenarios
4. Threshold Calculations
5. Governance Flows
6. Implementation Considerations

## 1. Core Implementation

### Base Structure
```haskell
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

```haskell
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

```haskell
-- 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

```haskell
-- 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
```haskell
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
```haskell
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

```haskell
-- 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
```haskell
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
```haskell
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
```haskell
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.