MCP Crypto Wallet EVM

Instructions

Implementation Reference

• src/handlers/wallet.ts:496-517 (handler)

  The handler function that implements the core logic for 'provider_get_block' tool. It uses the provider to fetch the block by hash or tag, optionally including transactions, and returns formatted success or error response.

  export const getBlockHandler = async (input: any): Promise<ToolResultSchema> => {
    try {
      if (!input.blockHashOrBlockTag) {
        return createErrorResponse("Block hash or block tag is required");
      }
  
      const provider = getProvider();
      // In ethers.js v5, getBlock can take includeTransactions as a second parameter
      // but TypeScript definitions might not reflect this
      const block = await (provider as any).getBlock(input.blockHashOrBlockTag, input.includeTransactions);
  
      return createSuccessResponse(
      `Block retrieved successfully
        Block hash: ${block.hash}
        Block number: ${block.number?.toString() ?? "Not specified"}
        Block timestamp: ${block.timestamp?.toString() ?? "Not specified"}
        Block transactions: ${block.transactions?.length ?? "Not specified"}
      `);
    } catch (error) {
      return createErrorResponse(`Failed to get block: ${(error as Error).message}`);
    }
  };

• src/tools.ts:391-402 (schema)

  The schema definition for the 'provider_get_block' tool, specifying input parameters and validation.

  {
    name: "provider_get_block",
    description: "Get a block by number or hash",
    inputSchema: {
      type: "object",
      properties: {
        blockHashOrBlockTag: { type: "string", description: "Block hash or block tag (latest, pending, etc.)" },
        includeTransactions: { type: "boolean", description: "Whether to include full transactions or just hashes" }
      },
      required: ["blockHashOrBlockTag"]
    }
  },

• src/tools.ts:590-590 (registration)

  The registration of the 'provider_get_block' tool name to its handler function in the handlers dictionary.

  "provider_get_block": getBlockHandler,