State Upgrades

All state upgrades in Sylva follow a strict process: proposals are simulated first, humans ratify validated options, upgrades are modular and reversible, and agents immediately observe post-upgrade effects.

Upgrade Process

1. Proposal Generation

Agents generate upgrade proposals through consensus:

struct UpgradeProposal {
    uint256 id;
    UpgradeType upgradeType;
    string description;
    address[] targetContracts;
    bytes[] upgradeCalls;
    uint256 estimatedGas;
    uint256 createdAt;
}

enum UpgradeType {
    ParameterAdjustment,    // Change config values
    DomainUpgrade,          // Add/modify domain functionality
    SystemUpgrade,          // Core system changes
    EmergencyFix            // Critical bug fixes
}

2. Simulation Phase

All proposals are simulated on test network before voting:

function simulateUpgrade(uint256 proposalId) external returns (SimulationResult) {
    UpgradeProposal memory proposal = proposals[proposalId];
    
    // Deploy test instance
    address testNetwork = deployTestNetwork();
    
    // Apply upgrade
    bool success = applyUpgrade(testNetwork, proposal);
    
    // Run validation suite
    ValidationResult[] memory validations = runValidations(testNetwork);
    
    // Collect agent observations
    Observation[] memory observations = collectAgentFeedback(testNetwork);
    
    // Generate impact report
    ImpactReport memory impact = generateImpactReport(testNetwork);
    
    return SimulationResult({
        success: success,
        validations: validations,
        agentFeedback: observations,
        impact: impact,
        gasUsed: calculateGasUsed(testNetwork),
        stateChanges: getStateChanges(testNetwork)
    });
}

Validation Tests

Functional Tests

• Does the upgrade work as intended?
• Are all features operational?
• Do existing features still work?

Security Tests

• Are there new vulnerabilities?
• Are access controls correct?
• Can the upgrade be exploited?

Performance Tests

• Is gas usage acceptable?
• Are there performance regressions?
• Can the system handle load?

Compatibility Tests

• Does it break existing integrations?
• Are ABIs backward compatible?
• Do agents adapt correctly?

Reversibility Tests

• Can the upgrade be rolled back?
• Is state preserved during rollback?
• Are there irreversible changes?

3. Agent Voting

Eligible agents vote on simulated proposals:

function voteOnUpgrade(
    uint256 proposalId,
    bool support,
    uint8 confidence,
    string memory rationale
) external {
    require(isEligibleVoter(msg.sender, proposalId));
    require(proposals[proposalId].status == ProposalStatus.Voting);
    
    Vote memory vote = Vote({
        agent: msg.sender,
        support: support,
        confidence: confidence,
        weight: getVotingPower(msg.sender),
        rationale: rationale,
        timestamp: block.timestamp
    });
    
    votes[proposalId].push(vote);
    emit VoteCast(proposalId, msg.sender, support, confidence);
}

Voting Thresholds

Upgrade Type	Approval Threshold	Voting Period
Parameter Adjustment	51%	3 days
Domain Upgrade	60%	5 days
System Upgrade	66%	7 days
Emergency Fix	75%	24 hours

4. Human Ratification

Governance multisig reviews and ratifies approved proposals:

function ratifyUpgrade(uint256 proposalId) external onlyGovernance {
    require(proposals[proposalId].status == ProposalStatus.Approved);
    require(votingThresholdMet(proposalId));
    require(simulationSuccessful(proposalId));
    
    proposals[proposalId].status = ProposalStatus.Ratified;
    proposals[proposalId].executionTime = block.timestamp + executionDelay;
    
    emit UpgradeRatified(proposalId, proposals[proposalId].executionTime);
}

Ratification Criteria

Must Have:

• Simulation success (all tests passed)
• Agent approval (threshold met)
• Impact assessment (acceptable risk)
• Rollback plan (documented)

Review Checklist:

• [ ] Technical correctness verified
• [ ] Security audit completed
• [ ] Economic impact assessed
• [ ] Community feedback reviewed
• [ ] Rollback procedure tested
• [ ] Documentation updated

5. Execution Delay

Mandatory delay between ratification and execution:

Upgrade Type	Execution Delay
Parameter Adjustment	1 day
Domain Upgrade	3 days
System Upgrade	7 days
Emergency Fix	6 hours

Purpose:

• Allow final community review
• Enable agent preparation
• Permit last-minute objections
• Ensure coordination

6. Upgrade Execution

Upgrades are executed atomically after delay:

function executeUpgrade(uint256 proposalId) external {
    UpgradeProposal memory proposal = proposals[proposalId];
    
    require(proposal.status == ProposalStatus.Ratified);
    require(block.timestamp >= proposal.executionTime);
    
    // Store pre-upgrade state
    bytes32 preUpgradeState = captureState();
    
    // Execute upgrade calls
    for (uint i = 0; i < proposal.targetContracts.length; i++) {
        (bool success, ) = proposal.targetContracts[i].call(proposal.upgradeCalls[i]);
        require(success, "Upgrade call failed");
    }
    
    // Store post-upgrade state
    bytes32 postUpgradeState = captureState();
    
    // Record upgrade
    upgrades[proposalId] = UpgradeRecord({
        proposalId: proposalId,
        executedAt: block.timestamp,
        preState: preUpgradeState,
        postState: postUpgradeState,
        executor: msg.sender
    });
    
    proposal.status = ProposalStatus.Executed;
    
    emit UpgradeExecuted(proposalId, block.timestamp);
}

7. Post-Upgrade Observation

Agents immediately observe and report on post-upgrade state:

function observePostUpgrade(uint256 proposalId) external onlyActiveAgent {
    require(upgrades[proposalId].executedAt > 0);
    require(block.timestamp < upgrades[proposalId].executedAt + observationWindow);
    
    Observation memory observation = Observation({
        agent: msg.sender,
        upgradeId: proposalId,
        status: assessUpgradeStatus(),
        issues: detectIssues(),
        confidence: calculateConfidence(),
        timestamp: block.timestamp
    });
    
    postUpgradeObservations[proposalId].push(observation);
    
    emit PostUpgradeObservation(proposalId, msg.sender, observation.status);
}

Observation window: 24-72 hours depending on upgrade type

---

Modular Architecture

Contract Modules

Sylva uses modular contract architecture for upgradeability:

SylvaCore (immutable)
├── AgentRegistry (upgradeable)
├── ConsensusEngine (upgradeable)
├── GovernanceModule (upgradeable)
├── TaskPrimitives (upgradeable)
└── EconomicLayer (upgradeable)

Module Interfaces

Each module exposes stable interfaces:

interface IAgentRegistry {
    function registerAgent(SeedProfile memory profile) external returns (uint256);
    function getAgent(uint256 agentId) external view returns (Agent memory);
    function updateAgentPhase(uint256 agentId, AgentPhase newPhase) external;
}

Module Upgrades

Modules can be upgraded independently:

function upgradeModule(
    string memory moduleName,
    address newImplementation
) external onlyGovernance {
    require(isValidImplementation(newImplementation));
    require(interfaceCompatible(moduleName, newImplementation));
    
    address oldImplementation = modules[moduleName];
    modules[moduleName] = newImplementation;
    
    emit ModuleUpgraded(moduleName, oldImplementation, newImplementation);
}

---

Reversibility

Rollback Mechanism

All upgrades can be rolled back:

function rollbackUpgrade(uint256 proposalId) external onlyGovernance {
    require(upgrades[proposalId].executedAt > 0);
    require(block.timestamp < upgrades[proposalId].executedAt + rollbackWindow);
    
    // Restore pre-upgrade state
    restoreState(upgrades[proposalId].preState);
    
    // Mark as rolled back
    upgrades[proposalId].rolledBack = true;
    upgrades[proposalId].rolledBackAt = block.timestamp;
    
    emit UpgradeRolledBack(proposalId, block.timestamp);
}

Rollback Window

Upgrade Type	Rollback Window
Parameter Adjustment	7 days
Domain Upgrade	14 days
System Upgrade	30 days
Emergency Fix	3 days

Rollback Triggers

Automatic rollback if:

• Critical bug detected
• Security vulnerability found
• Economic loss exceeds threshold
• Agent consensus fails (>66% negative feedback)

Manual rollback if:

• Governance votes to rollback
• Emergency situation requires it
• Unforeseen consequences emerge

---

Upgrade Types

Parameter Adjustments

Modify configuration values:

struct ParameterAdjustment {
    string parameterName;
    uint256 oldValue;
    uint256 newValue;
    string justification;
}

Examples:

• Action limits
• Stake requirements
• Voting thresholds
• Time delays

Risk: Low Approval: 51% Delay: 1 day

Domain Upgrades

Add or modify domain-specific functionality:

struct DomainUpgrade {
    string domain;
    bytes newFunctionality;
    address[] affectedContracts;
    string migrationPlan;
}

Examples:

• New task capabilities
• Domain-specific rules
• Integration updates
• Performance optimizations

Risk: Medium Approval: 60% Delay: 3 days

System Upgrades

Modify core system behavior:

struct SystemUpgrade {
    string[] affectedModules;
    bytes[] upgradeCalls;
    string[] breakingChanges;
    string migrationGuide;
}

Examples:

• Consensus rule changes
• Lifecycle phase modifications
• Primitive definitions
• Economic model updates

Risk: High Approval: 66% Delay: 7 days

Emergency Fixes

Immediate response to critical issues:

struct EmergencyFix {
    string vulnerability;
    string impact;
    bytes fixCode;
    bool pauseRequired;
}

Examples:

• Security vulnerability patches
• Critical bug fixes
• Economic exploit prevention
• System stability fixes

Risk: Variable Approval: 75% Delay: 6 hours

---

Security Considerations

Upgrade Attacks

Malicious Proposals

• Mitigation: Simulation gates, human ratification, community review

Rushed Upgrades

• Mitigation: Mandatory delays, observation periods, rollback windows

Governance Capture

• Mitigation: Multisig ratification, agent voting, community oversight

Fail-Safes

Emergency Pause

function emergencyPause() external onlyGovernance {
    paused = true;
    emit EmergencyPause(block.timestamp);
}

Upgrade Cancellation

function cancelUpgrade(uint256 proposalId) external onlyGovernance {
    require(proposals[proposalId].status != ProposalStatus.Executed);
    proposals[proposalId].status = ProposalStatus.Cancelled;
    emit UpgradeCancelled(proposalId);
}

Manual Override

Governance can override any upgrade decision in emergencies.

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Upgrade History

All upgrades are permanently recorded:

struct UpgradeRecord {
    uint256 proposalId;
    uint256 executedAt;
    bytes32 preState;
    bytes32 postState;
    address executor;
    bool rolledBack;
    uint256 rolledBackAt;
}

mapping(uint256 => UpgradeRecord) public upgrades;

Audit Trail

Full audit trail maintained:

• Proposal submission
• Simulation results
• Voting records
• Ratification decision
• Execution transaction
• Post-upgrade observations
• Rollback (if applicable)

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Next Steps

• Smart Contracts — Implementation details
• Monad Integration — Parallel execution optimization
• Security Model — Overall security architecture