MCP Crypto Wallet EVM

Instructions

Implementation Reference

• src/handlers/wallet.ts:729-744 (handler)

  The handler function getBlockNumberHandler that executes the tool logic: retrieves the Ethereum provider and calls getBlockNumber() to return the current block number.

  export const getBlockNumberHandler = async (input: any): Promise<ToolResultSchema> => {
    try {
      const provider = getProvider();
      if (!provider) {
        return createErrorResponse("Provider is required to get block number, please set the provider URL");
      }
      const blockNumber = await provider.getBlockNumber();
  
      return createSuccessResponse(
      `Block number retrieved successfully
        Block number: ${blockNumber.toString()}
      `);
    } catch (error) {
      return createErrorResponse(`Failed to get block number: ${(error as Error).message}`);
    }
  };

• src/tools.ts:534-542 (schema)

  Tool schema definition including name, description, and input schema (no parameters required).

  {
    name: "network_get_block_number",
    description: "Get the current block number",
    inputSchema: {
      type: "object",
      properties: {},
      required: []
    }
  },

• src/tools.ts:602-604 (registration)

  Registration of the network_get_block_number tool handler in the handlers dictionary, mapping the tool name to getBlockNumberHandler.

  "network_get_network": getNetworkHandler,
  "network_get_block_number": getBlockNumberHandler,
  "network_get_fee_data": getFeeDataHandler,

• src/tools.ts:1-36 (registration)

  Import statement that brings in the getBlockNumberHandler from the handlers/wallet.ts file.

  import {
    createWalletHandler,
    fromPrivateKeyHandler,
    fromMnemonicHandler,
    fromEncryptedJsonHandler,
    encryptWalletHandler,
    getAddressHandler,
    getPublicKeyHandler,
    getPrivateKeyHandler,
    getBalanceHandler,
    getChainIdHandler,
    getGasPriceHandler,
    getTransactionCountHandler,
    callHandler,
    sendTransactionHandler,
    signTransactionHandler,
    populateTransactionHandler,
    signMessageHandler,
    signTypedDataHandler,
    verifyMessageHandler,
    verifyTypedDataHandler,
    getBlockHandler,
    getTransactionHandler,
    getTransactionReceiptHandler,
    getCodeHandler,
    getStorageAtHandler,
    estimateGasHandler,
    getLogsHandler,
    getEnsResolverHandler,
    lookupAddressHandler,
    resolveNameHandler,
    getNetworkHandler,
    getBlockNumberHandler,
    getFeeDataHandler,
    createMnemonicPhraseHandler,
    setProviderHandler