Chain-Agnostic Architecture

interface IBlockchainProvider {
  // Network Information
  getChainId(): Promise<number>;
  getNetworkName(): string;
  getNativeCurrency(): CurrencyInfo;

  // Account Operations
  getBalance(address: string, tokenAddress?: string): Promise<BigNumber>;
  getTransactionCount(address: string): Promise<number>;

  // Transaction Operations
  sendTransaction(transaction: Transaction): Promise<TransactionResponse>;
  waitForTransaction(hash: string): Promise<TransactionReceipt>;
  estimateGas(transaction: Transaction): Promise<BigNumber>;

  // Contract Interactions
  callContract(
    address: string,
    abi: any[],
    method: string,
    params: any[]
  ): Promise<any>;

  // Event Monitoring
  subscribeToEvents(
    address: string,
    eventName: string,
    callback: EventCallback
  ): Promise<EventSubscription>;
}

interface IDEXAdapter {
  getName(): string;
  getSupportedChains(): number[];

  // Unified trading interface
  getPrice(tokenA: string, tokenB: string): Promise<Price>;
  executeSwap(
    tokenA: string,
    tokenB: string,
    amount: string,
    slippage: number
  ): Promise<SwapResult>;

  // Liquidity operations
  addLiquidity(
    tokenA: string,
    tokenB: string,
    amountA: string,
    amountB: string
  ): Promise<LiquidityResult>;
}

// Implementation examples
class UniswapV3Adapter implements IDEXAdapter {
  supportedChains = [1, 137, 42161]; // Ethereum, Polygon, Arbitrum
  // Implementation...
}

class SushiSwapAdapter implements IDEXAdapter {
  supportedChains = [1, 137, 56]; // Ethereum, Polygon, BSC
  // Implementation...
}

class CrossChainWorkflowState {
  private chainStates: Map<number, ChainState> = new Map();

  async getBalance(chainId: number, address: string): Promise<string> {
    const provider = this.getProvider(chainId);
    return await provider.getBalance(address);
  }

  async executeAcrossChains(
    operations: CrossChainOperation[]
  ): Promise<ExecutionResult[]> {
    const results: ExecutionResult[] = [];

    for (const operation of operations) {
      const provider = this.getProvider(operation.chainId);
      const result = await provider.executeOperation(operation);
      results.push(result);

      // Update state for dependent operations
      await this.updateChainState(operation.chainId, result);
    }

    return results;
  }
}

@Block({
  name: "Token Transfer",
  description: "Transfer tokens on any supported blockchain",
  category: "Web3 Operations",
  supportedChains: ["ethereum", "polygon", "arbitrum", "bsc"],
})
export class TokenTransferBlock {
  @BlockConfig()
  config: {
    chainId: number;
    tokenAddress: string;
    recipientAddress: string;
    amount: string;
  };

  async execute(): Promise<TransferResult> {
    // Get chain-specific provider
    const provider = this.getChainProvider(this.config.chainId);

    // Execute transfer using unified interface
    const transaction = await provider.transferToken({
      token: this.config.tokenAddress,
      to: this.config.recipientAddress,
      amount: this.config.amount,
    });

    // Wait for confirmation with chain-specific parameters
    const receipt = await provider.waitForTransaction(
      transaction.hash,
      this.getConfirmationRequirement(this.config.chainId)
    );

    return {
      transactionHash: receipt.transactionHash,
      blockNumber: receipt.blockNumber,
      gasUsed: receipt.gasUsed.toString(),
      chainId: this.config.chainId,
    };
  }

  // Chain-specific confirmation requirements
  private getConfirmationRequirement(chainId: number): number {
    const requirements = {
      1: 12, // Ethereum - 12 confirmations
      137: 3, // Polygon - 3 confirmations
      42161: 1, // Arbitrum - 1 confirmation
      56: 5, // BSC - 5 confirmations
    };
    return requirements[chainId] || 1;
  }
}

// Example: Cross-chain arbitrage workflow
const crossChainArbitrage = {
  name: "Cross-Chain Arbitrage",
  description: "Buy low on one chain, sell high on another",

  steps: [
    {
      blockType: "PriceMonitor",
      config: {
        tokenPair: "USDC/ETH",
        chains: [1, 137], // Ethereum and Polygon
        threshold: 0.5, // 0.5% price difference
      },
    },
    {
      blockType: "ConditionalExecution",
      config: {
        condition: "priceSpread > threshold",
      },
    },
    {
      blockType: "TokenSwap",
      config: {
        chainId: "{{ lowerPriceChain }}",
        fromToken: "USDC",
        toToken: "ETH",
        amount: "1000",
      },
    },
    {
      blockType: "BridgeTransfer",
      config: {
        fromChain: "{{ lowerPriceChain }}",
        toChain: "{{ higherPriceChain }}",
        token: "ETH",
        amount: "{{ swapResult.outputAmount }}",
      },
    },
    {
      blockType: "TokenSwap",
      config: {
        chainId: "{{ higherPriceChain }}",
        fromToken: "ETH",
        toToken: "USDC",
        amount: "{{ bridgeResult.outputAmount }}",
      },
    },
  ],
};