📒@hsuite/smart-ledgers - Multi-Ledger Management

🌐 Comprehensive multi-blockchain ledger management with unified API interface

Advanced ledger management system providing unified access to multiple blockchain networks including Hedera Hashgraph, Ripple/XRP Ledger, and other supported networks with standardized operations and error handling.

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Table of Contents

• Quick Start

• Architecture

• API Reference

• Guides

• Examples

• Integration

---

Quick Start

Installation

npm install @hsuite/smart-ledgers

Basic Setup

import { SmartLedgersModule } from '@hsuite/smart-ledgers';
import { ChainType, LedgerNetwork } from '@hsuite/smart-ledgers';

@Module({
  imports: [
    SmartLedgersModule.forRootAsync({
      useFactory: () => ({
        defaultChain: ChainType.HASHGRAPH,
        networks: {
          [ChainType.HASHGRAPH]: {
            network: LedgerNetwork.HEDERA_TESTNET,
            endpoint: 'https://testnet.hedera.com'
          },
          [ChainType.RIPPLE]: {
            network: LedgerNetwork.RIPPLE_TESTNET,
            endpoint: 'wss://s.altnet.rippletest.net:51233'
          }
        }
      })
    })
  ]
})
export class AppModule {}

Basic Usage

@Injectable()
export class LedgerService {
  constructor(private smartLedgersService: SmartLedgersService) {}

  async getAccountBalance(chainType: ChainType, accountId: string) {
    return await this.smartLedgersService.getBalance(chainType, accountId);
  }
}

---

Architecture

Core Multi-Ledger Framework

🌐 Unified Blockchain Interface

• Multi-Ledger Support - Hedera Hashgraph and Ripple (XRP) networks with unified API

• Service-Oriented Architecture - Specialized services for tokens, accounts, storage, and transactions

• Adapter Pattern - Extensible design for adding new blockchain networks

• Plugin System - Abstract base class for building blockchain-specific operations

🔧 Specialized Service Layer

• Account Management - Account creation, updates, balance queries, and lifecycle management

• Token Operations - Complete fungible and non-fungible token support with transfers

• Transaction Processing - Full transaction lifecycle with query, execute, and validation

• Cryptographic Operations - Key management, signing, verification, and secure operations

🏛️ Network & Configuration Management

• Network Abstraction - Seamless switching between mainnet and testnet environments

• Configuration Management - Centralized configuration with validation and defaults

• Connection Pooling - Efficient network connection management and retry mechanisms

• Type Safety - Comprehensive TypeScript interfaces and runtime validation

📊 Monitoring & Integration

• Real-time Status - Network status monitoring and connection health checks

• NestJS Integration - Full dependency injection and modular design patterns

• Documentation - JSDoc documentation with Compodoc support

• Error Handling - Comprehensive error handling with detailed error types

Service Architecture

ILedger (Main Interface)
├── IClient              # Network and client operations
├── IAccounts            # Account management operations
├── IFungibleToken       # Fungible token operations  
├── INonFungibleToken    # NFT operations
├── ITransactions        # Transaction management
├── IStorage             # Storage operations (HCS for Hedera)
├── ILedgerCryptography  # Cryptographic operations
└── ILedgerContainer     # Container facade for all services

Module Structure

src/
├── smart-ledgers.module.ts            # NestJS module configuration
├── smart-ledgers.service.ts           # Core service implementation
├── interfaces/                        # Service interfaces
│   ├── ledger.interface.ts           # Core ledger interface
│   ├── ledger-adapter.interface.ts   # Adapter interface
│   ├── accounts.interface.ts         # Account operations
│   ├── token.interface.ts            # Token operations
│   ├── transactions.interface.ts     # Transaction operations
│   ├── client.interface.ts           # Client operations
│   ├── storage.interface.ts          # Storage operations
│   └── cryptography.interface.ts     # Cryptographic operations
├── types/                            # TypeScript type definitions
│   ├── network.types.ts              # Network and configuration types
│   └── ledger.types.ts               # Transaction and operation types
├── ledgers/                          # Blockchain implementations
│   ├── hashgraph/                    # Hedera Hashgraph implementation
│   │   ├── hashgraph.adapter.ts     # Hedera adapter
│   │   ├── hashgraph.ledger.ts      # Hedera ledger
│   │   ├── hashgraph-container.ts   # Service container
│   │   └── services/                # Specialized services
│   │       ├── hashgraph-accounts.service.ts
│   │       ├── hashgraph-fungible-token.service.ts
│   │       ├── hashgraph-non-fungible-token.service.ts
│   │       ├── hashgraph-transactions.service.ts
│   │       ├── hashgraph-client.service.ts
│   │       ├── hashgraph-storage.service.ts
│   │       └── hashgraph-cryptography.service.ts
│   └── ripple/                       # Ripple (XRP) implementation
│       ├── ripple.adapter.ts         # Ripple adapter
│       ├── ripple.ledger.ts          # Ripple ledger
│       ├── ripple-container.ts       # Service container
│       └── services/                 # Specialized services
└── plugins/                          # Plugin system
    └── plugin.abstract.ts            # Abstract plugin base class

---

API Reference

SmartLedgersModule

Static Methods

forRootAsync(options: SmartLedgersAsyncOptions): DynamicModule

• Purpose: Configure module with async dependencies and multiple ledgers

• Parameters: Configuration options with ledger credentials and network settings

• Features: Multi-blockchain support, connection pooling, retry mechanisms

• Returns: Configured dynamic module with all adapters and services

SmartLedgersService

Core Methods

getAdapter(chain: ChainType): ILedgerAdapter

• Purpose: Get specific blockchain adapter for operations

• Parameters: Chain type (HASHGRAPH, RIPPLE)

• Returns: Configured adapter with full service access

• Usage: Primary method for accessing blockchain-specific functionality

initializeLedger(type: ChainType, config: ILedgerConfig): Promise<void>

• Purpose: Initialize ledger with configuration

• Parameters: Chain type and configuration object

• Process: Validates configuration, establishes connections, initializes services

• Error Handling: Throws configuration or connection errors

getTransaction(type: ChainType, transactionId: string): Promise<any>

• Purpose: Retrieve transaction details from any supported blockchain

• Parameters: Chain type and transaction identifier

• Returns: Transaction details with status and metadata

• Cross-chain: Unified interface across different blockchain formats

getNetworkStatus(type: ChainType): Promise<any>

• Purpose: Get current network status and connection health

• Parameters: Chain type to check

• Returns: Network status with connection details and health metrics

• Monitoring: Real-time network monitoring capabilities

ILedgerAdapter

Core Interface

getLedger(): ILedger

• Purpose: Get the main ledger interface for operations

• Returns: Configured ledger with all specialized services

• Usage: Gateway to all blockchain operations

initialize(config: ILedgerConfig): Promise<void>

• Purpose: Initialize adapter with configuration

• Parameters: Complete ledger configuration object

• Process: Validates config, establishes connections, prepares services

getType(): ChainType

• Purpose: Get the blockchain type this adapter handles

• Returns: Chain type enumeration value

• Usage: Runtime type checking and routing

Specialized Services

IAccounts - Account Management

create(initialBalance: number, publicKey?: string): Promise<AccountResult>

• Purpose: Create new blockchain account

• Parameters: Initial balance and optional public key

• Returns: Account creation result with account ID and transaction details

• Blockchain-specific: Handles different account creation patterns

getInfo(accountId: string): Promise<AccountInfo>

• Purpose: Retrieve comprehensive account information

• Parameters: Account identifier

• Returns: Account details including balance, keys, and properties

• Cross-chain: Unified account information format

getBalance(accountId: string): Promise<BalanceInfo>

• Purpose: Get account balance for native and token assets

• Parameters: Account identifier

• Returns: Balance information with native and token breakdowns

• Multi-asset: Supports multiple token types per account

IFungibleToken - Token Operations

create(tokenConfig: TokenConfig): Promise<TokenResult>

• Purpose: Create new fungible token

• Parameters: Complete token configuration with supply, keys, properties

• Returns: Token creation result with token ID and metadata

• Features: Configurable supply, freeze, wipe, and admin keys

mint(tokenId: string, amount: number, supplyKey: string): Promise<MintResult>

• Purpose: Mint additional tokens to treasury

• Parameters: Token ID, amount to mint, supply key for authorization

• Returns: Mint transaction result with new total supply

• Authorization: Requires valid supply key signature

transfer(fromAccountId: string, toAccountId: string, tokenId: string, amount: number, senderPrivateKey: string): Promise<TransferResult>

• Purpose: Transfer tokens between accounts

• Parameters: From/to accounts, token ID, amount, sender's private key

• Returns: Transfer transaction result with updated balances

• Validation: Validates balances and authorization before transfer

INonFungibleToken - NFT Operations

mint(tokenId: string, metadata: string, supplyKey: string): Promise<NFTMintResult>

• Purpose: Mint new NFT with metadata

• Parameters: Token ID, metadata URI/hash, supply key for authorization

• Returns: NFT mint result with serial number and transaction details

• Metadata: Supports IPFS hashes and URI formats

transfer(tokenId: string, serialNumber: number, fromAccountId: string, toAccountId: string, senderPrivateKey: string): Promise<NFTTransferResult>

• Purpose: Transfer specific NFT between accounts

• Parameters: Token ID, serial number, from/to accounts, sender key

• Returns: Transfer result with ownership confirmation

• Ownership: Validates current ownership before transfer

burn(tokenId: string, serialNumber: number, supplyKey: string): Promise<BurnResult>

• Purpose: Permanently burn NFT from circulation

• Parameters: Token ID, serial number, supply key for authorization

• Returns: Burn transaction result with confirmation

• Permanent: Irreversible operation reducing total supply

ITransactions - Transaction Management

getTransaction(transactionId: string): Promise<TransactionDetails>

• Purpose: Get detailed transaction information

• Parameters: Transaction identifier

• Returns: Complete transaction details with status and effects

• History: Access to historical transaction data

executeOfflineTransaction(transaction: any): Promise<ExecutionResult>

• Purpose: Execute pre-signed transaction

• Parameters: Serialized transaction object

• Returns: Execution result with confirmation

• Offline: Supports offline transaction preparation

ILedgerCryptography - Cryptographic Operations

generateKeyPair(): Promise<KeyPair>

• Purpose: Generate new cryptographic key pair

• Returns: Public and private key pair for blockchain operations

• Security: Uses blockchain-specific cryptographic standards

sign(privateKey: string, message: string): Promise<Signature>

• Purpose: Sign message with private key

• Parameters: Private key and message to sign

• Returns: Digital signature for verification

• Standards: Follows blockchain-specific signature formats

verify(publicKey: string, message: string, signature: string): Promise<boolean>

• Purpose: Verify signature against message and public key

• Parameters: Public key, original message, signature to verify

• Returns: Boolean indicating signature validity

• Verification: Cryptographic signature verification

IStorage - Consensus Storage (Hedera HCS)

createTopic(topicConfig: TopicConfig): Promise<TopicResult>

• Purpose: Create new consensus topic for message storage

• Parameters: Topic configuration with keys and properties

• Returns: Topic creation result with topic ID

• Consensus: Hedera Consensus Service integration

submitMessage(topicId: string, message: string): Promise<MessageResult>

• Purpose: Submit message to consensus topic

• Parameters: Topic ID and message content

• Returns: Message submission result with sequence number

• Ordering: Messages are consensus-ordered and timestamped

Error Types

Error Type	Description	Resolution
LedgerNotInitializedError	Ledger not properly initialized	Initialize ledger with valid configuration
InvalidChainTypeError	Unsupported blockchain type	Use supported chain types (HASHGRAPH, RIPPLE)
NetworkConnectionError	Network connectivity issues	Check network settings and connectivity
InsufficientBalanceError	Insufficient funds for operation	Ensure account has sufficient balance
InvalidCredentialsError	Invalid account credentials	Verify account ID and private key
TransactionFailedError	Transaction execution failed	Check transaction parameters and retry

---

📖 Guides

Multi-Blockchain Setup Guide

Complete guide to setting up and configuring multiple blockchain networks. Comprehensive setup instructions covering multi-chain architecture, adapter configuration, network-specific settings, consensus mechanisms, and unified blockchain operations with seamless cross-chain interoperability.

Plugin Development Guide

Advanced guide to creating custom blockchain plugins and extensions. Detailed development guide covering plugin architecture, adapter interface implementation, blockchain-specific customizations, API extensions, and integration patterns for enterprise blockchain solutions.

Token Operations Guide

Comprehensive guide to fungible and non-fungible token operations across blockchains. Advanced token management covering multi-chain token creation, cross-chain transfers, metadata standards, supply management, and enterprise-grade token lifecycle operations.

Security Best Practices Guide

Security recommendations and best practices for blockchain operations. Enterprise security guide covering private key management, transaction signing, access control, audit trails, and secure blockchain integration patterns for production deployments.

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Examples

Enterprise Multi-Blockchain Service

import { SmartLedgersService, ChainType, LedgerNetwork } from '@hsuite/smart-ledgers';
import { Injectable, Logger } from '@nestjs/common';

@Injectable()
export class EnterpriseBlockchainService {
  private readonly logger = new Logger(EnterpriseBlockchainService.name);

  constructor(private readonly smartLedgers: SmartLedgersService) {}

  async deployTokenAcrossChains(tokenConfig: any) {
    try {
      const chains = [ChainType.HASHGRAPH, ChainType.RIPPLE];
      const deploymentResults = [];

      for (const chain of chains) {
        try {
          const adapter = this.smartLedgers.getAdapter(chain);
          const tokenService = adapter.getLedger().getTokenService();

          // Create token on each blockchain
          const tokenResult = await tokenService.create({
            name: tokenConfig.name,
            symbol: tokenConfig.symbol,
            decimals: tokenConfig.decimals,
            initialSupply: tokenConfig.initialSupply,
            supplyKey: tokenConfig.supplyKey,
            adminKey: tokenConfig.adminKey
          });

          deploymentResults.push({
            chain,
            success: true,
            tokenId: tokenResult.tokenId,
            transactionId: tokenResult.transactionId,
            totalSupply: tokenResult.totalSupply
          });

          this.logger.log(`Token deployed on ${chain}: ${tokenResult.tokenId}`);

        } catch (error) {
          deploymentResults.push({
            chain,
            success: false,
            error: error.message
          });

          this.logger.error(`Failed to deploy token on ${chain}:`, error);
        }
      }

      // Cross-chain verification
      const verificationResults = await this.verifyTokenDeployments(deploymentResults);

      return {
        success: deploymentResults.some(r => r.success),
        deployments: deploymentResults,
        verification: verificationResults,
        crossChainMapping: this.createCrossChainMapping(deploymentResults),
        deployedAt: new Date().toISOString()
      };

    } catch (error) {
      this.logger.error('Multi-chain token deployment error:', error);
      throw error;
    }
  }

  async performCrossChainNFTOperations(nftConfig: any) {
    try {
      // Select primary and secondary chains
      const primaryChain = ChainType.HASHGRAPH;
      const secondaryChain = ChainType.RIPPLE;

      // Create NFT collection on primary chain
      const primaryNFT = await this.createNFTCollection(primaryChain, nftConfig);

      // Mirror NFT information on secondary chain
      const secondaryNFT = await this.mirrorNFTCollection(secondaryChain, nftConfig, primaryNFT);

      // Mint NFTs across chains
      const mintResults = await this.mintNFTsAcrossChains([
        { chain: primaryChain, tokenId: primaryNFT.tokenId },
        { chain: secondaryChain, tokenId: secondaryNFT.tokenId }
      ], nftConfig.initialMints);

      return {
        success: true,
        primaryChain: {
          chain: primaryChain,
          tokenId: primaryNFT.tokenId,
          mintedCount: mintResults.filter(r => r.chain === primaryChain).length
        },
        secondaryChain: {
          chain: secondaryChain,
          tokenId: secondaryNFT.tokenId,
          mintedCount: mintResults.filter(r => r.chain === secondaryChain).length
        },
        crossChainOperations: mintResults,
        timestamp: new Date().toISOString()
      };

    } catch (error) {
      this.logger.error('Cross-chain NFT operations error:', error);
      throw error;
    }
  }

  async monitorNetworkHealth() {
    try {
      const chains = [ChainType.HASHGRAPH, ChainType.RIPPLE];
      const healthStatus = [];

      for (const chain of chains) {
        try {
          const networkStatus = await this.smartLedgers.getNetworkStatus(chain);
          const adapter = this.smartLedgers.getAdapter(chain);
          const clientService = adapter.getLedger().getClientService();

          const detailedStatus = await clientService.getNetworkStatus();

          healthStatus.push({
            chain,
            healthy: true,
            status: networkStatus,
            details: detailedStatus,
            lastChecked: new Date().toISOString()
          });

        } catch (error) {
          healthStatus.push({
            chain,
            healthy: false,
            error: error.message,
            lastChecked: new Date().toISOString()
          });
        }
      }

      const overallHealth = healthStatus.every(status => status.healthy);

      return {
        overallHealth,
        chainStatus: healthStatus,
        totalChains: chains.length,
        healthyChains: healthStatus.filter(s => s.healthy).length,
        monitoredAt: new Date().toISOString()
      };

    } catch (error) {
      this.logger.error('Network health monitoring error:', error);
      throw error;
    }
  }

  private async verifyTokenDeployments(deployments: any[]): Promise<any> {
    // Implementation would verify token deployments across chains
    const successfulDeployments = deployments.filter(d => d.success);
    
    return {
      verified: successfulDeployments.length > 0,
      verifiedChains: successfulDeployments.map(d => d.chain),
      consistency: successfulDeployments.length === deployments.length
    };
  }

  private createCrossChainMapping(deployments: any[]): any {
    // Implementation would create mapping between chain-specific token IDs
    const mapping = {};
    deployments.filter(d => d.success).forEach(deployment => {
      mapping[deployment.chain] = deployment.tokenId;
    });
    return mapping;
  }

  private async createNFTCollection(chain: ChainType, config: any): Promise<any> {
    const adapter = this.smartLedgers.getAdapter(chain);
    const nftService = adapter.getLedger().getNftService();

    return await nftService.create({
      name: config.name,
      symbol: config.symbol,
      maxSupply: config.maxSupply,
      supplyKey: config.supplyKey,
      adminKey: config.adminKey
    });
  }

  private async mirrorNFTCollection(chain: ChainType, config: any, primaryNFT: any): Promise<any> {
    // Implementation would create corresponding NFT collection on secondary chain
    return await this.createNFTCollection(chain, {
      ...config,
      name: `${config.name} Mirror`,
      symbol: `${config.symbol}M`
    });
  }

  private async mintNFTsAcrossChains(collections: any[], mintConfigs: any[]): Promise<any[]> {
    const results = [];

    for (const collection of collections) {
      for (const mintConfig of mintConfigs) {
        try {
          const adapter = this.smartLedgers.getAdapter(collection.chain);
          const nftService = adapter.getLedger().getNftService();

          const mintResult = await nftService.mint(
            collection.tokenId,
            mintConfig.metadata,
            mintConfig.supplyKey
          );

          results.push({
            chain: collection.chain,
            tokenId: collection.tokenId,
            serialNumber: mintResult.serialNumber,
            success: true
          });

        } catch (error) {
          results.push({
            chain: collection.chain,
            tokenId: collection.tokenId,
            success: false,
            error: error.message
          });
        }
      }
    }

    return results;
  }
}

Advanced Plugin Development System

import { SmartLedgerPluginAbstract, ChainType } from '@hsuite/smart-ledgers';
import { Injectable, Logger } from '@nestjs/common';
import { SmartConfigService } from '@hsuite/smart-config';

/**
 * Chain-specific handlers for complex operations
 */
class HashgraphAdvancedHandler {
  private readonly logger = new Logger(HashgraphAdvancedHandler.name);

  async executeComplexTransaction(operations: any[]): Promise<any> {
    // Hedera-specific complex transaction logic
    this.logger.log(`Executing ${operations.length} operations on Hedera`);
    
    // Implementation would handle Hedera-specific transaction batching
    return {
      transactionId: `0.0.123@${Date.now()}.${Math.random() * 1000000000}`,
      operations: operations.length,
      status: 'success'
    };
  }

  async optimizeGasCosts(transactions: any[]): Promise<any> {
    // Hedera-specific gas optimization
    return {
      originalCost: transactions.length * 0.0001,
      optimizedCost: transactions.length * 0.00008,
      savings: 0.00002 * transactions.length
    };
  }
}

class RippleAdvancedHandler {
  private readonly logger = new Logger(RippleAdvancedHandler.name);

  async executeComplexTransaction(operations: any[]): Promise<any> {
    // Ripple-specific complex transaction logic
    this.logger.log(`Executing ${operations.length} operations on Ripple`);
    
    // Implementation would handle XRP Ledger-specific transaction features
    return {
      transactionId: `${Math.random().toString(36).substring(2, 15).toUpperCase()}`,
      operations: operations.length,
      status: 'success'
    };
  }

  async optimizeGasCosts(transactions: any[]): Promise<any> {
    // Ripple-specific fee optimization
    return {
      originalCost: transactions.length * 0.000012,
      optimizedCost: transactions.length * 0.00001,
      savings: 0.000002 * transactions.length
    };
  }
}

/**
 * Advanced operations plugin demonstrating complex chain-agnostic logic
 */
@Injectable()
export class AdvancedOperationsPlugin extends SmartLedgerPluginAbstract {
  protected handlers: Record<string, any>;
  private readonly logger = new Logger(AdvancedOperationsPlugin.name);

  constructor(
    protected readonly smartConfigService: SmartConfigService,
    protected readonly smartLedgersService: SmartLedgersService
  ) {
    super(smartConfigService, smartLedgersService);
    
    // Initialize chain-specific handlers
    this.handlers = {
      [ChainType.HASHGRAPH]: new HashgraphAdvancedHandler(),
      [ChainType.RIPPLE]: new RippleAdvancedHandler()
    };
  }

  async executeAtomicOperations(operations: any[]) {
    try {
      const handler = this.getChainHandler();
      
      // Validate operations before execution
      const validationResult = await this.validateOperations(operations);
      if (!validationResult.valid) {
        throw new Error(`Operation validation failed: ${validationResult.reason}`);
      }

      // Optimize operations for current chain
      const optimizedOperations = await this.optimizeOperations(operations);

      // Execute complex transaction
      const result = await handler.executeComplexTransaction(optimizedOperations);

      // Post-execution verification
      const verification = await this.verifyExecution(result);

      return {
        success: true,
        chain: this.chain,
        originalOperations: operations.length,
        optimizedOperations: optimizedOperations.length,
        executionResult: result,
        verification,
        completedAt: new Date().toISOString()
      };

    } catch (error) {
      this.logger.error('Atomic operations execution error:', error);
      throw error;
    }
  }

  async optimizeCostsAcrossChains(transactions: any[]) {
    try {
      const allChains = [ChainType.HASHGRAPH, ChainType.RIPPLE];
      const optimizationResults = [];

      for (const chainType of allChains) {
        // Switch context to different chain
        const handler = this.handlers[chainType];
        
        if (handler) {
          const optimization = await handler.optimizeGasCosts(transactions);
          optimizationResults.push({
            chain: chainType,
            ...optimization
          });
        }
      }

      // Find most cost-effective chain
      const bestChain = optimizationResults.reduce((best, current) => 
        current.optimizedCost < best.optimizedCost ? current : best
      );

      return {
        optimizations: optimizationResults,
        recommendation: {
          bestChain: bestChain.chain,
          estimatedCost: bestChain.optimizedCost,
          potentialSavings: optimizationResults[0].originalCost - bestChain.optimizedCost
        },
        analyzedAt: new Date().toISOString()
      };

    } catch (error) {
      this.logger.error('Cross-chain cost optimization error:', error);
      throw error;
    }
  }

  async monitorAndBalance(thresholds: any) {
    try {
      const currentChain = this.chain;
      const ledger = this.ledger;
      
      // Monitor current chain performance
      const performance = await this.monitorChainPerformance(ledger);

      // Check if rebalancing is needed
      const rebalanceNeeded = await this.assessRebalanceNeed(performance, thresholds);

      if (rebalanceNeeded.required) {
        // Execute rebalancing operations
        const rebalanceResult = await this.executeRebalancing(
          rebalanceNeeded.operations
        );

        return {
          monitored: true,
          rebalanced: true,
          currentChain,
          performance,
          rebalanceResult,
          timestamp: new Date().toISOString()
        };
      }

      return {
        monitored: true,
        rebalanced: false,
        currentChain,
        performance,
        status: 'within_thresholds',
        timestamp: new Date().toISOString()
      };

    } catch (error) {
      this.logger.error('Monitor and balance error:', error);
      throw error;
    }
  }

  private async validateOperations(operations: any[]): Promise<any> {
    // Implementation would validate operations for current chain
    return {
      valid: operations.length > 0,
      reason: operations.length === 0 ? 'No operations provided' : null
    };
  }

  private async optimizeOperations(operations: any[]): Promise<any[]> {
    // Implementation would optimize operations for current chain
    return operations.filter(op => op.type !== 'redundant');
  }

  private async verifyExecution(result: any): Promise<any> {
    // Implementation would verify transaction execution
    return {
      verified: result.status === 'success',
      transactionId: result.transactionId,
      timestamp: new Date().toISOString()
    };
  }

  private async monitorChainPerformance(ledger: any): Promise<any> {
    // Implementation would monitor blockchain performance metrics
    return {
      throughput: 95,
      latency: 3.2,
      errorRate: 0.1,
      gasPrice: 0.0001
    };
  }

  private async assessRebalanceNeed(performance: any, thresholds: any): Promise<any> {
    // Implementation would assess if rebalancing is needed
    const needsRebalance = performance.errorRate > thresholds.maxErrorRate;
    
    return {
      required: needsRebalance,
      operations: needsRebalance ? ['switch_chain', 'redistribute_load'] : []
    };
  }

  private async executeRebalancing(operations: any[]): Promise<any> {
    // Implementation would execute rebalancing operations
    return {
      operations: operations.length,
      success: true,
      newDistribution: 'balanced'
    };
  }
}

Complete Account and Transaction Management

import { SmartLedgersService, ChainType } from '@hsuite/smart-ledgers';
import { Injectable, Logger } from '@nestjs/common';

@Injectable()
export class ComprehensiveBlockchainService {
  private readonly logger = new Logger(ComprehensiveBlockchainService.name);

  constructor(private readonly smartLedgers: SmartLedgersService) {}

  async createAndFundAccount(chain: ChainType, initialBalance: number) {
    try {
      const adapter = this.smartLedgers.getAdapter(chain);
      const accountService = adapter.getLedger().getAccountService();
      const cryptoService = adapter.getLedger().getCryptographyService();

      // Generate new key pair
      const keyPair = await cryptoService.generateKeyPair();

      // Create account with initial balance
      const accountResult = await accountService.create(
        initialBalance,
        keyPair.publicKey
      );

      // Verify account creation
      const accountInfo = await accountService.getInfo(accountResult.accountId);

      return {
        success: true,
        account: {
          accountId: accountResult.accountId,
          publicKey: keyPair.publicKey,
          privateKey: keyPair.privateKey, // Store securely in production
          initialBalance,
          createdAt: new Date().toISOString()
        },
        verification: {
          verified: accountInfo.accountId === accountResult.accountId,
          currentBalance: accountInfo.balance,
          status: accountInfo.status
        },
        transactionId: accountResult.transactionId
      };

    } catch (error) {
      this.logger.error('Account creation error:', error);
      throw error;
    }
  }

  async performCompleteTokenWorkflow(chain: ChainType, accountCredentials: any) {
    try {
      const adapter = this.smartLedgers.getAdapter(chain);
      const tokenService = adapter.getLedger().getTokenService();
      const nftService = adapter.getLedger().getNftService();

      // Step 1: Create fungible token
      const fungibleToken = await tokenService.create({
        name: 'Enterprise Token',
        symbol: 'ENT',
        decimals: 8,
        initialSupply: 1000000,
        supplyKey: accountCredentials.privateKey,
        adminKey: accountCredentials.privateKey
      });

      // Step 2: Create NFT collection
      const nftCollection = await nftService.create({
        name: 'Enterprise NFTs',
        symbol: 'ENFT',
        maxSupply: 10000,
        supplyKey: accountCredentials.privateKey,
        adminKey: accountCredentials.privateKey
      });

      // Step 3: Mint some NFTs
      const nftMints = [];
      for (let i = 0; i < 5; i++) {
        const mintResult = await nftService.mint(
          nftCollection.tokenId,
          `https://metadata.example.com/nft/${i}`,
          accountCredentials.privateKey
        );
        nftMints.push(mintResult);
      }

      // Step 4: Get final balances and info
      const accountInfo = await adapter.getLedger().getAccountService()
        .getInfo(accountCredentials.accountId);

      return {
        success: true,
        workflow: {
          fungibleToken: {
            tokenId: fungibleToken.tokenId,
            name: 'Enterprise Token',
            symbol: 'ENT',
            totalSupply: fungibleToken.totalSupply
          },
          nftCollection: {
            tokenId: nftCollection.tokenId,
            name: 'Enterprise NFTs',
            symbol: 'ENFT',
            mintedCount: nftMints.length
          },
          nftMints: nftMints.map(mint => ({
            tokenId: nftCollection.tokenId,
            serialNumber: mint.serialNumber,
            transactionId: mint.transactionId
          }))
        },
        accountStatus: {
          accountId: accountCredentials.accountId,
          balance: accountInfo.balance,
          tokenAssociations: accountInfo.tokenAssociations || []
        },
        completedAt: new Date().toISOString()
      };

    } catch (error) {
      this.logger.error('Complete token workflow error:', error);
      throw error;
    }
  }

  async demonstrateStorageOperations(chain: ChainType, accountCredentials: any) {
    try {
      if (chain !== ChainType.HASHGRAPH) {
        return {
          supported: false,
          message: 'Storage operations are currently only supported on Hedera Hashgraph',
          chain
        };
      }

      const adapter = this.smartLedgers.getAdapter(chain);
      const storageService = adapter.getLedger().getStorageService();

      // Create a topic for message storage
      const topic = await storageService.createTopic({
        memo: 'Enterprise Application Messages',
        adminKey: accountCredentials.privateKey,
        submitKey: accountCredentials.privateKey
      });

      // Submit messages to the topic
      const messages = [
        'System initialization complete',
        'User authentication successful',
        'Transaction processing started',
        'Data backup completed',
        'System status: operational'
      ];

      const messageResults = [];
      for (const message of messages) {
        const result = await storageService.submitMessage(
          topic.topicId,
          message
        );
        messageResults.push(result);
      }

      // Get topic information
      const topicInfo = await storageService.getTopicInfo(topic.topicId);

      return {
        success: true,
        storage: {
          topicId: topic.topicId,
          messagesSubmitted: messageResults.length,
          topicInfo: {
            memo: topicInfo.memo,
            sequenceNumber: topicInfo.sequenceNumber,
            runningHash: topicInfo.runningHash
          }
        },
        messages: messageResults.map((result, index) => ({
          content: messages[index],
          sequenceNumber: result.sequenceNumber,
          transactionId: result.transactionId,
          consensusTimestamp: result.consensusTimestamp
        })),
        demonstratedAt: new Date().toISOString()
      };

    } catch (error) {
      this.logger.error('Storage operations demonstration error:', error);
      throw error;
    }
  }
}

---

Integration

Required Dependencies

{
  "@nestjs/common": "^10.4.2",
  "@nestjs/core": "^10.4.2",
  "@hashgraph/sdk": "^2.62.0",
  "xrpl": "^2.14.0",
  "@hsuite/smart-config": "^2.1.1",
  "@hsuite/helpers": "^2.0.8"
}

Environment Configuration

# Hedera Hashgraph Configuration
HEDERA_ACCOUNT_ID=0.0.123456
HEDERA_PRIVATE_KEY=302e020100300506032b657004220420...
HEDERA_PUBLIC_KEY=302a300506032b6570032100...
HEDERA_NETWORK=testnet
HEDERA_MAX_QUERY_PAYMENT=1
HEDERA_MAX_TRANSACTION_FEE=2

# Ripple (XRP) Configuration  
RIPPLE_ADDRESS=rUocf1ixKzTuEe34kmVhRvGqNCofY1NJzV
RIPPLE_SEED=sn3nxiW7v8KXzPzAqzyHXbSSKNuN9
RIPPLE_NETWORK=testnet
RIPPLE_TIMEOUT=30000
RIPPLE_FEE_CUSHION=1.2
RIPPLE_MAX_FEE_XRP=2

# General Configuration
SMART_LEDGERS_ENABLED=true
SMART_LEDGERS_DEFAULT_CHAIN=hashgraph
SMART_LEDGERS_RETRY_ATTEMPTS=3
SMART_LEDGERS_TIMEOUT=30000

Module Integration

import { SmartLedgersModule, ChainType, LedgerNetwork } from '@hsuite/smart-ledgers';
import { ConfigModule, ConfigService } from '@nestjs/config';

@Module({
  imports: [
    ConfigModule.forRoot(),
    SmartLedgersModule.forRootAsync({
      imports: [ConfigModule],
      useFactory: (configService: ConfigService) => ({
        ledgers: {
          [ChainType.HASHGRAPH]: {
            network: configService.get('HEDERA_NETWORK') === 'mainnet' 
              ? LedgerNetwork.HEDERA_MAINNET 
              : LedgerNetwork.HEDERA_TESTNET,
            credentials: {
              accountId: configService.get('HEDERA_ACCOUNT_ID'),
              privateKey: configService.get('HEDERA_PRIVATE_KEY'),
              publicKey: configService.get('HEDERA_PUBLIC_KEY')
            },
            options: {
              maxQueryPayment: configService.get('HEDERA_MAX_QUERY_PAYMENT', 1),
              maxTransactionFee: configService.get('HEDERA_MAX_TRANSACTION_FEE', 2),
              maxRetries: configService.get('SMART_LEDGERS_RETRY_ATTEMPTS', 3),
              timeout: configService.get('SMART_LEDGERS_TIMEOUT', 30000)
            }
          },
          [ChainType.RIPPLE]: {
            network: configService.get('RIPPLE_NETWORK') === 'mainnet'
              ? LedgerNetwork.RIPPLE_MAINNET
              : LedgerNetwork.RIPPLE_TESTNET,
            credentials: {
              address: configService.get('RIPPLE_ADDRESS'),
              seed: configService.get('RIPPLE_SEED')
            },
            options: {
              timeout: configService.get('RIPPLE_TIMEOUT', 30000),
              feeCushion: configService.get('RIPPLE_FEE_CUSHION', 1.2),
              maxFeeXRP: configService.get('RIPPLE_MAX_FEE_XRP', '2')
            }
          }
        }
      }),
      inject: [ConfigService],
      isGlobal: true
    })
  ]
})
export class BlockchainIntegrationModule {}

Usage Patterns

// Basic service injection
@Injectable()
export class MyService {
  constructor(private readonly smartLedgers: SmartLedgersService) {}

  async performOperation() {
    // Get adapter for specific chain
    const adapter = this.smartLedgers.getAdapter(ChainType.HASHGRAPH);
    
    // Access specialized services
    const accountService = adapter.getLedger().getAccountService();
    const nftService = adapter.getLedger().getNftService();
    
    // Perform operations
    const accountInfo = await accountService.getInfo('0.0.123456');
    const mintResult = await nftService.mint('0.0.789012', 'metadata', 'supplyKey');
  }
}

Plugin Development

// Create custom plugin extending base abstract class
@Injectable()
export class CustomPlugin extends SmartLedgerPluginAbstract {
  protected handlers = {
    [ChainType.HASHGRAPH]: new HashgraphHandler(),
    [ChainType.RIPPLE]: new RippleHandler()
  };

  async customOperation(data: any) {
    const handler = this.getChainHandler();
    return await handler.executeCustomLogic(data);
  }
}

Network Switching

// Switch between networks dynamically
const testnetAdapter = smartLedgers.getAdapter(ChainType.HASHGRAPH);
// Configure for mainnet operations
await smartLedgers.initializeLedger(ChainType.HASHGRAPH, {
  network: LedgerNetwork.HEDERA_MAINNET,
  credentials: mainnetCredentials
});

---

🌐 Multi-Blockchain: Unified interface for Hedera Hashgraph and Ripple (XRP) networks with extensible architecture.

🔧 Service-Oriented: Specialized services for accounts, tokens, transactions, and cryptographic operations.

🏗️ Enterprise-Ready: Full NestJS integration with comprehensive error handling and monitoring capabilities.

---

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