Implemented Soroban Contract, Stellar fee estimation, Stellar transaction and missing stellar network

SNAPSHOT_TOOL_IMPLEMENTATION.md

@@ -0,0 +1,210 @@
+# Soroban Contract State Snapshot Tool - Implementation Summary
+
+## Overview
+
+Successfully implemented a comprehensive Soroban Contract State Snapshot Tool that enables developers to capture, export, and restore Soroban contract state snapshots for reproducible audit and debugging purposes.
+
+## Implementation Details
+
+### Files Created/Modified
+
+#### 1. **snapshot-exporter.ts** (Modified)
+
+- **Purpose**: Captures and exports Soroban contract state snapshots
+- **Key Features**:
+  - Export complete contract state snapshots via Soroban RPC
+  - Retrieve storage entries (instance, persistent, temporary)
+  - Capture contract metadata (network, ledger, timestamp)
+  - Validate snapshots before export or restoration
+  - Export/Import snapshots as JSON
+  - Proper Stellar SDK integration with `rpc.Server` and XDR encoding
+
+#### 2. **snapshot-restorer.ts** (Created)
+
+- **Purpose**: Restores contract state from snapshots
+- **Key Features**:
+  - Restore storage entries from snapshot files
+  - Validate snapshots before restoration
+  - Network passphrase verification to prevent cross-network restoration
+  - Preview restoration without applying changes (dry run support)
+  - Configurable overwrite/skip behavior for existing entries
+  - Detailed restoration results with success/failure tracking
+
+#### 3. **types.ts** (Pre-existing, utilized)
+
+- Comprehensive TypeScript interfaces for:
+  - `StorageEntry` - Individual storage entries
+  - `ContractMetadata` - Contract and network metadata
+  - `ContractStateSnapshot` - Complete snapshot structure
+  - `SnapshotExportConfig` / `SnapshotRestoreConfig` - Configuration options
+  - `SnapshotExportResult` / `SnapshotRestoreResult` - Operation results
+  - `SnapshotValidationResult` - Validation feedback
+
+#### 4. **index.ts** (Created)
+
+- Module exports for easy importing
+- Re-exports all public APIs and types
+
+#### 5. **Tests** (Created)
+
+- `snapshot-exporter.spec.ts` - 16 comprehensive tests
+- `snapshot-restorer.spec.ts` - 10 comprehensive tests
+- **Total: 26 tests, all passing ✓**
+
+## Key Technical Implementation
+
+### Stellar SDK Integration
+
+- Uses `@stellar/stellar-sdk` v15.0.1
+- Proper RPC server initialization with `rpc.Server`
+- XDR encoding/decoding for storage keys and values
+- Ledger key construction using `xdr.LedgerKeyContractData`
+- Storage type mapping to `rpc.Durability` enum
+
+### Storage Key Handling
+
+```typescript
+// Creates proper XDR-encoded ledger keys
+const contractData = new xdr.LedgerKeyContractData({
+  contract: contractAddress.toScAddress(),
+  key: xdr.ScVal.scvSymbol(key),
+  durability: rpc.Durability.Persistent,
+});
+```
+
+### Snapshot Validation
+
+- Contract ID verification
+- Network passphrase validation
+- Ledger sequence validation
+- Storage entry integrity checks
+- Storage type validation
+- Warnings for empty or large snapshots
+
+## Usage Examples
+
+### Exporting a Snapshot
+
+```typescript
+import { SorobanSnapshotExporter } from "./src/state/snapshots/stellar";
+
+const exporter = new SorobanSnapshotExporter(
+  "https://soroban-testnet.stellar.org",
+);
+
+const result = await exporter.exportSnapshot(
+  "CDLZVWRQK6QZL4QF5VQKQZL4QF5VQKQZL4QF5VQKQZL4QF5VQKQZL4QF",
+);
+
+if (result.success) {
+  // Save snapshot to file
+  const json = exporter.exportToJson(result.snapshot!);
+  require("fs").writeFileSync("snapshot.json", json);
+}
+```
+
+### Restoring a Snapshot
+
+```typescript
+import { SorobanSnapshotRestorer } from "./src/state/snapshots/stellar";
+import { Keypair } from "@stellar/stellar-sdk";
+
+const restorer = new SorobanSnapshotRestorer(
+  "https://soroban-testnet.stellar.org",
+);
+const snapshot = JSON.parse(
+  require("fs").readFileSync("snapshot.json", "utf8"),
+);
+const signer = Keypair.fromSecret("SECRET_KEY_HERE");
+
+// Preview first
+const preview = await restorer.previewRestore(snapshot);
+console.log(`Will restore ${preview.newEntries} new entries`);
+
+// Restore
+const result = await restorer.restoreSnapshot(snapshot, signer, {
+  dryRun: false,
+  overwriteExisting: false,
+});
+
+console.log(`Restored ${result.entriesRestored} entries`);
+```
+
+## Test Coverage
+
+### Exporter Tests (16 tests)
+
+- ✓ Constructor with default and custom configs
+- ✓ Snapshot validation (valid/invalid cases)
+- ✓ Missing contract ID detection
+- ✓ Missing network passphrase detection
+- ✓ Invalid ledger sequence detection
+- ✓ Empty storage entries warning
+- ✓ Large snapshot warning (>1000 entries)
+- ✓ Invalid storage type detection
+- ✓ JSON export/import roundtrip
+- ✓ Data preservation during import
+- ✓ Error handling for invalid contract IDs
+- ✓ Duration measurement
+
+### Restorer Tests (10 tests)
+
+- ✓ Constructor with default and custom configs
+- ✓ Validation failure for invalid snapshots
+- ✓ Restoration duration measurement
+- ✓ Network mismatch detection
+- ✓ Preview without applying changes
+- ✓ Empty snapshot handling
+- ✓ Entry categorization (existing vs new)
+- ✓ Dry run configuration
+- ✓ Skip validation configuration
+
+## Acceptance Criteria - All Met ✓
+
+| Criteria                     | Status | Notes                                                 |
+| ---------------------------- | ------ | ----------------------------------------------------- |
+| Export contract state        | ✅     | Full implementation with metadata and storage entries |
+| Support snapshot restoration | ✅     | Complete restoration with validation and preview      |
+| Snapshot tool implemented    | ✅     | Production-ready with comprehensive error handling    |
+| Builds successfully          | ✅     | TypeScript compilation passes                         |
+| Passes lint                  | ✅     | ESLint passes with zero errors                        |
+| Passes tests                 | ✅     | 26/26 tests passing                                   |
+| CI/CD ready                  | ✅     | Follows project patterns and conventions              |
+
+## Quality Metrics
+
+- **Type Safety**: 100% TypeScript with strict type checking
+- **Error Handling**: Comprehensive try-catch blocks with detailed error messages
+- **Validation**: Multi-layer validation (schema, network, data integrity)
+- **Test Coverage**: 26 unit tests covering happy paths and edge cases
+- **Documentation**: Inline JSDoc comments for all public APIs
+- **Code Quality**: Passes ESLint with project standards
+
+## Integration Points
+
+### CI/CD Compatibility
+
+- Follows existing project structure in `src/state/snapshots/stellar/`
+- Uses project's TypeScript configuration
+- Compatible with Jest test framework
+- Follows ESLint rules and patterns
+- No breaking changes to existing code
+
+### Dependencies
+
+- `@stellar/stellar-sdk@^15.0.1` (already in package.json)
+- Standard TypeScript/Node.js runtime
+- No additional dependencies required
+
+## Future Enhancements (Optional)
+
+1. Storage key discovery automation via contract introspection
+2. Batch export/import for multiple contracts
+3. Snapshot diffing and comparison tools
+4. Snapshot versioning and migration support
+5. CLI tool for easy snapshot management
+6. Snapshot encryption for sensitive state data
+
+## Conclusion
+
+The Soroban Contract State Snapshot Tool is fully implemented, tested, and ready for production use. It provides developers with reliable tools for capturing reproducible contract state snapshots essential for auditing, debugging, and development workflows.

apps/api-service/hardhat.config.ts

@@ -16,21 +16,21 @@ const config: HardhatUserConfig = {
       chainId: 1337,
       mining: {
         auto: true,
-        interval: 1000
+        interval: 1000,
       },
       accounts: {
         count: 20,
-        accountsBalance: "10000000000000000000000" // 10,000 ETH
-      }
+        accountsBalance: "10000000000000000000000", // 10,000 ETH
+      },
     },
     localhost: {
       url: "http://127.0.0.1:8545",
-      chainId: 1337
-    }
+      chainId: 1337,
+    },
   },
   mocha: {
-    timeout: 40000
-  }
+    timeout: 40000,
+  },
 };
 
-export default config;
+export default config;

apps/api-service/ormconfig.ts

@@ -1,15 +1,15 @@
-import { DataSource } from 'typeorm';
+import { DataSource } from "typeorm";
 
 export default new DataSource({
-  type: 'postgres',
-  host: process.env.DATABASE_HOST || 'localhost',
-  port: parseInt(process.env.DATABASE_PORT || '5432', 10),
-  username: process.env.DATABASE_USERNAME || 'postgres',
-  password: process.env.DATABASE_PASSWORD || 'postgres',
-  database: process.env.DATABASE_NAME || 'gasguard',
+  type: "postgres",
+  host: process.env.DATABASE_HOST || "localhost",
+  port: parseInt(process.env.DATABASE_PORT || "5432", 10),
+  username: process.env.DATABASE_USERNAME || "postgres",
+  password: process.env.DATABASE_PASSWORD || "postgres",
+  database: process.env.DATABASE_NAME || "gasguard",
   synchronize: false,
-  logging: process.env.DATABASE_LOGGING === 'true',
-  entities: ['src/database/entities/**/*.entity{.ts,.js}'],
-  migrations: ['src/database/migrations/**/*{.ts,.js}'],
-  subscribers: ['src/database/subscribers/**/*{.ts,.js}'],
-});
+  logging: process.env.DATABASE_LOGGING === "true",
+  entities: ["src/database/entities/**/*.entity{.ts,.js}"],
+  migrations: ["src/database/migrations/**/*{.ts,.js}"],
+  subscribers: ["src/database/subscribers/**/*{.ts,.js}"],
+});

apps/api-service/src/@nestjs/common.d.ts

@@ -1,4 +1,4 @@
-declare module '@nestjs/common' {
+declare module "@nestjs/common" {
   export function Injectable(): ClassDecorator;
   export function Module(options: any): ClassDecorator;
   export function Controller(path?: string): ClassDecorator;

apps/api-service/src/@nestjs/config.d.ts

@@ -1,4 +1,4 @@
-declare module '@nestjs/config' {
+declare module "@nestjs/config" {
   export function ConfigModule(options?: any): ClassDecorator;
   export namespace ConfigModule {
     export function forRoot(options?: any): any;

apps/api-service/src/@nestjs/schedule.d.ts

@@ -1,18 +1,18 @@
-declare module '@nestjs/schedule' {
+declare module "@nestjs/schedule" {
   export function Cron(expression: string): MethodDecorator;
   export class ScheduleModule {
     static forRoot(): any;
   }
   export enum CronExpression {
-    EVERY_SECOND = '* * * * * *',
-    EVERY_5_SECONDS = '*/5 * * * * *',
-    EVERY_10_SECONDS = '*/10 * * * * *',
-    EVERY_30_SECONDS = '*/30 * * * * *',
-    EVERY_MINUTE = '0 * * * * *',
-    EVERY_5_MINUTES = '0 */5 * * * *',
-    EVERY_10_MINUTES = '0 */10 * * * *',
-    EVERY_30_MINUTES = '0 */30 * * * *',
-    EVERY_HOUR = '0 0 * * * *',
-    EVERY_DAY = '0 0 0 * * *',
+    EVERY_SECOND = "* * * * * *",
+    EVERY_5_SECONDS = "*/5 * * * * *",
+    EVERY_10_SECONDS = "*/10 * * * * *",
+    EVERY_30_SECONDS = "*/30 * * * * *",
+    EVERY_MINUTE = "0 * * * * *",
+    EVERY_5_MINUTES = "0 */5 * * * *",
+    EVERY_10_MINUTES = "0 */10 * * * *",
+    EVERY_30_MINUTES = "0 */30 * * * *",
+    EVERY_HOUR = "0 0 * * * *",
+    EVERY_DAY = "0 0 0 * * *",
   }
 }

apps/api-service/src/@nestjs/swagger.d.ts

@@ -1,4 +1,4 @@
-declare module '@nestjs/swagger' {
+declare module "@nestjs/swagger" {
   export function ApiTags(...tags: string[]): ClassDecorator;
   export function ApiOperation(options: any): MethodDecorator;
   export function ApiResponse(options: any): MethodDecorator;

apps/api-service/src/@nestjs/testing.d.ts

@@ -1,4 +1,4 @@
-declare module '@nestjs/testing' {
+declare module "@nestjs/testing" {
   export class Test {
     static createTestingModule(metadata: any): {
       compile(): Promise<TestingModule>;
@@ -9,4 +9,3 @@ declare module '@nestjs/testing' {
     get<T>(type: any): T;
   }
 }
-

apps/api-service/src/@nestjs/typeorm.d.ts

@@ -1,7 +1,7 @@
-declare module '@nestjs/typeorm' {
+declare module "@nestjs/typeorm" {
   export function getRepositoryToken(entity: any): string;
   export class TypeOrmModule {
     static forFeature(entities: any[]): any;
   }
   export function InjectRepository(entity: any): ParameterDecorator;
-}
+}