feat: implement emergency migration system and migrate project to ESM

contracts/migration/EmergencyMigration.ts

@@ -0,0 +1,134 @@
+import { MigrationStatus } from './interfaces/IEmergencyMigration';
+import type { IEmergencyMigration, IMigrationAnalytics } from './interfaces/IEmergencyMigration';
+import { MigrationLib } from './libraries/MigrationLib';
+import { StatePreserver } from './preservation/StatePreserver';
+import { RapidMigrator } from './execution/RapidMigrator';
+import { MigrationVerifier } from './verification/MigrationVerifier';
+
+/**
+ * EmergencyMigration is the main entry point and facade for the migration ecosystem.
+ * Integrates triggers, state preservation, execution, and verification.
+ */
+export class EmergencyMigration implements IEmergencyMigration {
+    private statePreserver: StatePreserver;
+    private migrator: RapidMigrator;
+    private verifier: MigrationVerifier;
+
+    private status: MigrationStatus = MigrationStatus.IDLE;
+    private analytics: IMigrationAnalytics | undefined;
+    private multiSigThreshold: number = 2; // Required approvals
+
+    // Mock for current contract state (for simulation)
+    private currentContractState: Record<string, any> = {
+        'totalPowerGenerated': 1500,
+        'activeMeters': 42,
+        'daoBalance': 1000000,
+        'configs': { 'version': '1.0.0', 'emergencyMode': false }
+    };
+
+    constructor() {
+        this.statePreserver = new StatePreserver();
+        this.migrator = new RapidMigrator(this.statePreserver);
+        this.verifier = new MigrationVerifier(this.statePreserver);
+    }
+
+    /**
+     * Triggers an emergency migration. Requires multi-sig approval.
+     */
+    public async triggerMigration(reason: string, approvers: string[]): Promise<void> {
+        if (this.status !== MigrationStatus.IDLE && this.status !== MigrationStatus.ROLLED_BACK) {
+            throw new Error(`Cannot trigger migration from current status: ${this.status}`);
+        }
+
+        if (!MigrationLib.validateApprovals(approvers, this.multiSigThreshold)) {
+            throw new Error(`Insufficient multi-sig approvals. Required: ${this.multiSigThreshold}, Got: ${approvers.length}`);
+        }
+
+        console.log(`[EmergencyMigration] Triggered by reason: ${reason}`);
+        this.status = MigrationStatus.TRIGGERED;
+
+        this.analytics = {
+            startTime: Date.now(),
+            triggerReason: reason,
+            approvedBy: approvers
+        };
+
+        // Standard protocol: Capture state immediately upon trigger (within 5 mins target)
+        this.statePreserver.captureState(this.currentContractState);
+    }
+
+    /**
+     * Executes the rapid migration process.
+     */
+    public async executeMigration(targetContractAddress: string): Promise<boolean> {
+        if (this.status !== MigrationStatus.TRIGGERED) {
+            throw new Error('Migration must be triggered before execution.');
+        }
+
+        console.log('[EmergencyMigration] Beginning rapid migration execution...');
+        try {
+            const success = await this.migrator.migrate(targetContractAddress);
+            if (success) {
+                this.status = MigrationStatus.IN_PROGRESS; // Internally handled by migrator, but we update status
+                return true;
+            }
+            return false;
+        } catch (error) {
+            this.status = MigrationStatus.FAILED;
+            throw error;
+        }
+    }
+
+    /**
+     * Verifies the migration and updates final analytics.
+     */
+    public async verifyMigration(): Promise<boolean> {
+        if (this.status !== MigrationStatus.IN_PROGRESS && this.migrator.getStatus() !== MigrationStatus.COMPLETED) {
+            throw new Error('Migration must be completed before verification.');
+        }
+
+        // Simulating the target contract's state (which should match the preserved state)
+        const migratedStateMock = { ...this.currentContractState }; 
+
+        const integrityOk = this.verifier.verifyIntegrity(migratedStateMock);
+        const functionalOk = await this.verifier.verifyFunctionality();
+
+        const endTime = Date.now();
+        const duration = endTime - (this.analytics?.startTime || endTime);
+        const gasUsed = MigrationLib.estimateMigrationGas(JSON.stringify(migratedStateMock).length);
+
+        const performanceOk = this.verifier.verifyPerformance(duration, gasUsed);
+
+        if (integrityOk && functionalOk && performanceOk) {
+            this.status = MigrationStatus.COMPLETED;
+            if (this.analytics) {
+                this.analytics.endTime = endTime;
+                this.analytics.duration = duration;
+                this.analytics.gasUsed = gasUsed;
+            }
+            console.log('[EmergencyMigration] Verification successful. Migration finalized.');
+            return true;
+        } else {
+            console.warn('[EmergencyMigration] Verification failed! Recommend rollback.');
+            return false;
+        }
+    }
+
+    /**
+     * Rolls back the migration.
+     */
+    public async rollback(): Promise<void> {
+        console.log('[EmergencyMigration] Initiating rollback protocol...');
+        // In a real scenario, this would restore the old contract pointers
+        this.status = MigrationStatus.ROLLED_BACK;
+        console.log('[EmergencyMigration] Rollback completed. State restored to previous stable version.');
+    }
+
+    public getStatus(): MigrationStatus {
+        return this.status;
+    }
+
+    public getAnalytics(): IMigrationAnalytics | undefined {
+        return this.analytics;
+    }
+}

contracts/migration/execution/RapidMigrator.ts

@@ -0,0 +1,82 @@
+import { MigrationStatus } from '../interfaces/IEmergencyMigration';
+import { StatePreserver } from '../preservation/StatePreserver';
+
+/**
+ * RapidMigrator orchestrates the migration execution, ensuring minimal disruption.
+ * Manages the transition from old to new contract instance.
+ */
+export class RapidMigrator {
+    private statePreserver: StatePreserver;
+    private status: MigrationStatus = MigrationStatus.IDLE;
+    private targetContractAddress: string | null = null;
+
+    constructor(statePreserver: StatePreserver) {
+        this.statePreserver = statePreserver;
+    }
+
+    /**
+     * Executes the rapid migration process.
+     * @param targetContractAddress The address of the new contract instance.
+     * @returns True if migration completed successfully.
+     */
+    public async migrate(targetContractAddress: string): Promise<boolean> {
+        this.status = MigrationStatus.IN_PROGRESS;
+        this.targetContractAddress = targetContractAddress;
+
+        try {
+            console.log(`[RapidMigrator] Initiating migration to ${targetContractAddress}...`);
+
+            // 1. Snapshot the current state (this would be from the original contract)
+            // For simulation, we assume state is already captured by StatePreserver in the Trigger phase
+            const state = this.statePreserver.restoreState();
+
+            // 2. Pause the old contract (Minimal Disruption Protocol: < 10 mins)
+            await this.pauseOldContract();
+
+            // 3. Deploy/Initialize the new contract with the restored state
+            await this.initializeNewContract(targetContractAddress, state);
+
+            // 4. Update DAO pointers to the new contract
+            await this.updateDaoPointers(targetContractAddress);
+
+            // 5. Unpause the new contract
+            await this.unpauseNewContract(targetContractAddress);
+
+            this.status = MigrationStatus.COMPLETED;
+            console.log('[RapidMigrator] Migration completed successfully.');
+            return true;
+        } catch (error: any) {
+            this.status = MigrationStatus.FAILED;
+            console.error(`[RapidMigrator] Migration failed: ${error.message}`);
+            throw error;
+        }
+    }
+
+    private async pauseOldContract(): Promise<void> {
+        console.log('[RapidMigrator] Pausing old contract...');
+        // Simulation: wait for 100ms
+        await new Promise(resolve => setTimeout(resolve, 100));
+    }
+
+    private async initializeNewContract(address: string, state: Record<string, any>): Promise<void> {
+        console.log(`[RapidMigrator] Initializing new contract at ${address} with preserved state...`);
+        // Simulation: wait for 200ms
+        await new Promise(resolve => setTimeout(resolve, 200));
+    }
+
+    private async updateDaoPointers(address: string): Promise<void> {
+        console.log(`[RapidMigrator] Updating DAO pointers to point to ${address}...`);
+        // Simulation: wait for 50ms
+        await new Promise(resolve => setTimeout(resolve, 50));
+    }
+
+    private async unpauseNewContract(address: string): Promise<void> {
+        console.log(`[RapidMigrator] Unpausing new contract at ${address}...`);
+        // Simulation: wait for 50ms
+        await new Promise(resolve => setTimeout(resolve, 50));
+    }
+
+    public getStatus(): MigrationStatus {
+        return this.status;
+    }
+}

contracts/migration/interfaces/IEmergencyMigration.ts

@@ -0,0 +1,61 @@
+/**
+ * Enumeration of migration statuses to track the lifecycle of an emergency migration.
+ */
+export enum MigrationStatus {
+    IDLE = 'IDLE',
+    TRIGGERED = 'TRIGGERED',
+    IN_PROGRESS = 'IN_PROGRESS',
+    COMPLETED = 'COMPLETED',
+    ROLLED_BACK = 'ROLLED_BACK',
+    FAILED = 'FAILED'
+}
+
+/**
+ * Metadata for tracking migration performance and audit trails.
+ */
+export interface IMigrationAnalytics {
+    startTime: number;
+    endTime?: number;
+    duration?: number; // in milliseconds
+    gasUsed?: number;
+    triggerReason: string;
+    approvedBy: string[]; // List of multi-sig addresses
+}
+
+/**
+ * Core interface for the Emergency Migration system in the CurrentDao ecosystem.
+ */
+export interface IEmergencyMigration {
+    /**
+     * Triggers an emergency migration. Requires multi-sig approval.
+     * @param reason The reason for the emergency migration.
+     * @param approvers List of addresses that approved the migration.
+     */
+    triggerMigration(reason: string, approvers: string[]): Promise<void>;
+
+    /**
+     * Executes the rapid migration process.
+     * @param targetContractAddress The address of the new contract instance.
+     */
+    executeMigration(targetContractAddress: string): Promise<boolean>;
+
+    /**
+     * Verifies the integrity and functionality of the migrated state.
+     */
+    verifyMigration(): Promise<boolean>;
+
+    /**
+     * Rolls back the migration to the previous stable state if possible.
+     */
+    rollback(): Promise<void>;
+
+    /**
+     * Returns the current status of the migration.
+     */
+    getStatus(): MigrationStatus;
+
+    /**
+     * Returns analytics for the migration.
+     */
+    getAnalytics(): IMigrationAnalytics | undefined;
+}

contracts/migration/libraries/MigrationLib.ts

@@ -0,0 +1,49 @@
+import crypto from 'node:crypto';
+
+/**
+ * Utility library for emergency migration tasks, focusing on checksums and gas/performance tracking.
+ */
+export class MigrationLib {
+    /**
+     * Generates a unique checksum for a given file or metadata object.
+     * @param data The data to be hashed.
+     * @returns SHA-256 hash.
+     */
+    static generateChecksum(data: any): string {
+        const str = typeof data === 'string' ? data : JSON.stringify(data);
+        return crypto.createHash('sha256').update(str).digest('hex');
+    }
+
+    /**
+     * Estimates gas equivalence for a migration operation.
+     * In this TS-based ecosystem, we simulate gas cost based on data volume.
+     * @param dataSize Size of the state in bytes.
+     * @returns Estimated gas equivalent.
+     */
+    static estimateMigrationGas(dataSize: number): number {
+        const baseGas = 50000;
+        const gasPerByte = 10;
+        return baseGas + (dataSize * gasPerByte);
+    }
+
+    /**
+     * Validates that a migration trigger has sufficient multi-sig approvals.
+     * @param approvers List of addresses that approved the migration.
+     * @param required Threshold for approval.
+     * @returns True if valid.
+     */
+    static validateApprovals(approvers: string[], required: number): boolean {
+        return approvers.length >= required;
+    }
+
+    /**
+     * Formats duration in a human-readable format.
+     * @param ms Duration in milliseconds.
+     * @returns Formatted string.
+     */
+    static formatDuration(ms: number): string {
+        const minutes = Math.floor(ms / 60000);
+        const seconds = ((ms % 60000) / 1000).toFixed(0);
+        return `${minutes}m ${seconds}s`;
+    }
+}

contracts/migration/preservation/StatePreserver.ts

@@ -0,0 +1,68 @@
+import { MigrationLib } from '../libraries/MigrationLib';
+
+/**
+ * StatePreserver handles capturing, storing, and restoring the contract state.
+ * Ensuring 100% data integrity during emergency migration.
+ */
+export class StatePreserver {
+    private capturedState: Record<string, any> | null = null;
+    private stateChecksum: string | null = null;
+
+    /**
+     * Captures the current state of a contract provided as a key-value object.
+     * @param state The state object to preserve.
+     * @returns True if state was successfully captured and validated.
+     */
+    public captureState(state: Record<string, any>): boolean {
+        // Deep copy the state to prevent accidental mutations
+        this.capturedState = JSON.parse(JSON.stringify(state));
+        this.stateChecksum = MigrationLib.generateChecksum(this.capturedState);
+
+        console.log(`[StatePreserver] State captured. Checksum: ${this.stateChecksum}`);
+        return true;
+    }
+
+    /**
+     * Restores the captured state to a new contract instance.
+     * @returns The restored state object.
+     * @throws Error if no state was captured or if checksum fails.
+     */
+    public restoreState(): Record<string, any> {
+        if (!this.capturedState) {
+            throw new Error('No state captured to restore.');
+        }
+
+        const currentChecksum = MigrationLib.generateChecksum(this.capturedState);
+        if (currentChecksum !== this.stateChecksum) {
+            throw new Error('State integrity compromised! Checksum mismatch.');
+        }
+
+        console.log('[StatePreserver] State restored successfully.');
+        return JSON.parse(JSON.stringify(this.capturedState));
+    }
+
+    /**
+     * Verifies the integrity of a state object against the captured checksum.
+     * @param state The state object to verify.
+     * @returns True if integrity is maintained.
+     */
+    public verifyIntegrity(state: Record<string, any>): boolean {
+        const verifyChecksum = MigrationLib.generateChecksum(state);
+        return verifyChecksum === this.stateChecksum;
+    }
+
+    /**
+     * Returns the checksum of the captured state.
+     */
+    public getChecksum(): string | null {
+        return this.stateChecksum;
+    }
+
+    /**
+     * Clears the preserved state.
+     */
+    public clear(): void {
+        this.capturedState = null;
+        this.stateChecksum = null;
+    }
+}